Copeland-Scroll-Compressor-Large-Zx

Copeland Scroll™ Compressor Large ZX Condensing Unit & EMP Rack for Refrigeration Applications

User Manual

Copeland Scroll™ Large ZX Condensing Unit and EMP Rack

Emerson is pleased to offer Copeland Scroll Large ZX Condensing Unit and EMP Rack for Refrigeration Applications.

In addition to 2-9 HP condensing unit, Emerson expands Next Generation ZX platform to 12-20 HP medium temperature and low temperature condensing unit and rack, configuring with digital modulation for best in class energy efficiency and food safety.

Emerson ZX series has been highly successful in global market and enjoys proven success with its energy savings and customer-friendly electronic features. Table of contents

Overview 4

Nomenclature 7

Bill of material 8

Envelope 9

Technical data 11

Physical layout 13

CoreSense™ controller 17

Network wiring 26

Installation 29

Electrical connection 29

Refrigeration piping installation 29

Location and fixing 32

Start up and operation 35

Vacuuming 35

Charging procedure 35

Check before starting & during operation 37

Alarm codes 39

Troubleshooting 41

Temperature sensor resistance table 48

Wiring diagrams 49

Contact lists 52

Overview

Disclaimer

Thanks for purchasing Copeland Scroll™ Large ZX Condensing Unit and EMP Rack from Emerson. Large ZX Condensing Unit and EMP Rack exhibit market-leading quality in terms of cooling capacity and operating range, as part of product extension for Next Generation ZX platform in larger capacity range and installation variants. The product is designed to operate reliably and to deliver high operating efficiencies in medium and low temperature refrigeration applications. It also provides constant monitoring of the compressor operating conditions and displays the running or fault conditions of the condensing unit or rack.

In order to ensure the safe and reliable operation of the unit and rack, the installation of Large ZX Condensing Unit and EMP Rack must comply with industry standards. The selection, installation and maintenance of Large ZX Condensing Unit and EMP Rack must be carried out by professionals. This user manual does not include all industry guidelines for the installation of refrigeration equipment. For loss caused by inexperienced or untrained personnel or due to wrong installation design, it will not as a reasonable reason for responsibility.

If you have any questions, please contact the local sales office for unit or rack type and serial number on the nameplate for consultation. For example, the wiring diagram supplied with each unit or rack takes precedence over the wiring diagram in this manual if any discrepancy occurs, please refer to the attached wiring diagram in the unit or rack. ZX condensing unit introduction

ZX series condensing units have gained market popularity and have achieved great success in the Asian market with their energy-saving and friendly control experience. ZX/ZXB/ZXD/ZXL/ZXLD units in Asia are used on-site by famous end-users and cold chain retailers. ZX platform products have been widely recognized in the global market. Specially developed models have been exported to the United States, Latin America, Europe and the Middle East markets. Receiving your unit

All units are filled with dry nitrogen at a positive pressure before transportation. The unit and package are clearly labeled. The unit shut-off valve is equipped with a maintenance interface to check the unit pressure maintenance.

4 Caution!

When you receive a unit from Emerson or an authorized representative, it is very important to check the pressure of each unit. If it is found that packing pressure has disappeared, please contact Emerson or an authorized representative. Failure to report this may cause subsequent failure reports to be unobstructed.

Damage to the unit caused by the transport process should fall within the category of insurance claims and not be a manufacturing defect. It is also advisable to inspect the rest of the unit for obvious physical damage and inform us or our authorized representative in case any is discovered.

ZX Platform Condensing Unit and EMP Rack were designed based on three factors demanded by industry users:

Intelligent Store Solutions - A most innovative approach to enterprise facility management, Emerson Intelligent Store™ architecture integrates hardware and services, to provide retailers a single view into their entire work of facilities and understand what facilities actually cost to operate and maintain.

The Intelligent Store architecture transforms data from store equipment and controls into actionable insights. Designed to deliver value in both new and existing stores, Emerson aims to help the retailers:

• Make better decisions on recources investment for greatest impact • Gain accurate feedback and customized service to your specific needs • Reduce operational costs and boost the profitability at most convenience

Energy Efficiency - Utilizing Copeland Scroll™ compressor technology, variable speed fan motor, large capacity condenser coil and advanced control algorithms, energy consumption is significantly reduced. End-users can save more than 20% on annual energy costs rather than using hermetic reciprocating units.

Reliability - Combining the proven reliability of Copeland Scroll compressors with advanced electronics controller and diagnostics, equipment reliability is greatly enchanced. Fault code alerts and fault code retrieval capabilities provide information to help improve speed and accuracy of system diagnostics. Integrated electronics provide protection against over-current, over-heating, incorrect phase rotation, compressor cycling, high pressure resets, low pressure cut-outs. It can also send out a warning message to an operator when there is liquid floodback, which can prevent critical damage on the unit.

Intelligent Store Better decision making

Highest efficiency Lower enery bills

Reliability Lower maintenance cost

5 Large ZX Condensing Unit and EMP Rack features

Copeland Scroll™ Compressor Technology Highly efficient, ultra-quiet and highly reliable Configured with CoreSense™ Controller • Provides electronic diagnosis, protection and communication modules for energy-saving and reliable unit control • Provides digital modulation control

Emerson Unique Digital Technology • Proven reliable modulation technology for end user energy saving, accurate temperature control and best food safety

Enhanced Vapor Injection • High efficient solution for refrigeration application

Design features • Real-time monitoring of compressor operating conditions • Compressor reverse rotation protection • Compressor over current protection • Compressor internal motor protector trip • Discharge gas over heat protection • Over voltage protection • Under voltage protection • High pressure protection • Low pressure cut-out • Refrigerant floodback warning • Compressor minimum off time • Internal thermal sensor failure warning • Compressor oil shortage protection • Intelligent Store Solution: Communication and retail store monitoring

6 Nomenclature

Large ZX Condensing Unit

ZX D 160 B E - TFD - 551 Generation E = Ester Oil E = Ester 12 to 20 HP 12 to 5XX = Without Door 5XX = Without LD = Digital low temp LD = Digital low Condensing Unit Family Condensing D = Digital medium temp D = Digital medium TFD = 380V/420V- 3ph- 50 Hz TFD = 380V/420V-

Base model Electrical Code Bill of Material

EMP Scroll Rack

EMP D 160 E - TFD - 110 E = Ester Oil E = Ester 12 to 20 HP 12 to Scroll Rack Family Rack Scroll 110 = With Canopy LD = Digital low temp LD = Digital low 120 = Without Canopy 120 = Without D = Digital medium temp D = Digital medium TFD = 380V/420V- 3ph- 50 Hz TFD = 380V/420V-

Base model Electrical Code Bill of Material

7 Bill of material

Large ZX / Scroll Rack Model ZXD ZXLD EMPD EMPLD

BOM 551 581 551 581 110 120 110 120 Liquid Line Filter Drier /         Moisture Indicator Liquid Receiver         Oil Separator (w/ Reservoir)         Oil Filter         Accumulator     Low Pressure Transducer         High Pressure Transducer         Fixed LP Switch     Fixed HP Switch         CoreSense™         Intelligent Store Solution         Fan Speed Control         Circuit Breaker         Sound Jacket         Low Ambient Kit  

Electronic Oil Level         Protective Control

Service Valves         Discharge Line Check Valve         Suction Line Header     Discharge Line Header     Oil Return Line Header     Chassis Canopy      

8 Envelope

Large ZX Condensing unit

43 R404A ZXD Digital medium temperature

RGT 18°C SH 10 K Ambient temperature °C temperature Ambient Fan speed control function for lower than 10°C ambient

10 -20 -15 -10 Evaporating temperature °C 0 5

43 R404A ZXLD Digital low temperature

Maximum suction gas temperature 20°C Ambient temperature °C temperature Ambient Fan speed control function for lower than 10°C ambient

10 -40 Evaporating temperature °C 0

9 EMPD/EMPLD Envelope

55 R404A EMPD Digital medium temperature

Return gas temperature 20°C Condensing temperature °C temperature Condensing

10 -20 -15 -10 -4 Evaporating temperature °C

55 R404A EMPLD Digital low temperature

Return gas temperature 20°C Condensing temperature °C temperature Condensing

5 -40 -35 Evaporating temperature °C -10 -4

10 Technical Data

Large ZX condensing Unit ZXD160BE-TFD ZXLD160BE-TFD

Nominal horsepower HP 16

No of compressors 2

Compressor 3PH-380V-50Hz Powered by Fan 1PH-220V-50Hz

ET/AT/RGT °C -6.7/32/18.3 -32/32/5

Capacity KW 29 15.5 Performance R404A COP W/W 2.4 1.3

Sound Pressure Level @1m dB(A) 69

Rated load ampere A 11.1 + 11.1 14.6 + 14.6

Locked totor ampere A 74 102 Compressor Oil type POE

Oil charge volume L 1.9+1.9

Number of fan 2

Fan diameter mm 590

Fan motor Fan speed rpm 850

Air flow m3/h 19280

Total fan motor power W 950

Oil separator oil charge L 2.5

Receiver volume L 17

Suction pipe OD inch 1 3/8

Other Liquid line pipe OD inch 3/4

Dimension (W x D x H) mm 1619 x 1010 x 1124

Weight (net) kg 308 312

Weight (gross) kg 408 412

11 Technical Data

Product Series EMP Rack

Nominal HP 12 HP MT 16 HP MT 12 HP LT 16 HP LT

Model Name EMPD120E EMPD160E EMPLD120E EMPLD160E

-8/45/18.3/ -8/45/18.3/0 -32 /45 /5 /Max SC ET/AT/RGT/SC °C Max SC

Capacity kW 21.8 30 12.4 17 Performance R404A COP 2.3 2.8 1.5 1.5

Sound Pressure Level @1m dB(A) 67 66 66 70

Rated Load Ampere A 21.1 23.8 22.2 29.2

Locked Rotor Ampere A 74 100 74 102 Compressor Oil Type POE

Oil Charge L 1.9+1.9 1.9+1.9 1.9+1.9 1.9+1.9

Oil Separator Charge L 3 3 3 3

Receiver Volume (at 32°C) L 40 40 40 40

Dimension, W×D×H mm 1619×1010×1124 Others Weight (Net) kg 244 258 254 262

Weight (Gross) kg 324 338 334 342

Mounting Hole mm 1090×980 (4 - Φ12.0)

Sub-cooled Liquid Pipe inch 3/4 3/4 3/4 3/4 OD (Evap In)

Suction Pipe inch 1 3/8 1 3/8 1 3/8 1 3/8 OD (Evap Out) Piping size Discharge Pipe inch 3/4 3/4 3/4 3/4 OD (Cond In)

Liquid Pipe OD inch 3/4 3/4 3/4 3/4 (Cond Out)

12 Physical layout

The following picture shows the outline of the Large ZX condensing unit.

CoreSense™ controller view window

Moisture indicator observation port Oil observation ports

Figure 1. Large ZX layout

The normal oil level should be lower than the upper observation port, but higher than the lower observation port. If the oil level is lower than the lower observation port, replenish oil immediately. When the unit is running, replenish from the unit's suction service valve using a high pressure oil gun. Reference oil recharge volume: 0.70 liters. If the oil level is higher than the upper observation port, keep the unit running but observe it closely.

Liquid receiver Filter drier Accumulator Digital compressor (LT unit only) Fixed compressor Oil separator (reservoir) Electronic oil control

Oil filter

Check valve Discharge check valve PHE

Moisture indicator

Upper oil sight glass EXV valve Solenoid valve Lower oil sight glass

Service valve

Figure 2. Main components of Large ZX

13 Circuit Circuit Fan speed 24V CoreSense™ breaker 1 breaker 2 control Transformer controller

Customer Contactor 1 Contactor 2 Capacitor Internal 24V terminals terminals Transformer

Figure 3. Electrical module of Large ZX

Service valves

Figure 4. Service valves of Large ZX

14 The following picture shows the outline of EMP Scroll Rack.

Liquid level alarm CoreSense™ controller view window

Moisture indicator observation port Oil observation ports High/Low pressure gauge

Figure 5. EMP Rack layout

Pressure safety valve

Liquid receiver

Dischage line check valve Fix speed compressor Digital compressor Suction accumulator (Low temp model only)

Electronic oil control Suction header Oil filter drier

Upper oil sight glass Lower oil sight glass Discharge header Moisture indicator Electronic expansion valve Suction header Plate heat exchanger (except EMPD120E)

Core type liquid filter drier

Figure 6. Main components of EMP Rack

15 Circuit Circuit Fan speed Alarm 24V CoreSense™ breaker 1 breaker 2 control LED Transformer controller

Customer Contactor 1 Contactor 2 Relay Internal 24V terminals Terminals Transformer

Figure 7. Electrical module of EMP Rack

Service valves

Sub-cooled liquid pipe (Evap in) Suction pipe (Evap out) Liquid pipe (Cond Out) Discharge pipe (Cond in)

Figure 8. Service valves of EMP Rack

16 CoreSense™ controller

LED descriptions

LED Status Description LED Status Description Compressor 1 Browsing the On On is running service menu 1 Compressor 1 Browsing the Flashing Flashing is ready to start fast access menu Compressor 2 On On A new alarm happened is running 2 ! Compressor 2 Browsing the Flashing Flashing is ready to start alarm menu Condensing fan On On An alarm is occuring is running1 !

Digital compressor Liquid line On On is unloading solenoid valve on On Display with C _ Reserved Flashing Programmable mode

On Low liquid level2 On Liquid level normal2

Note:

1This function is available in Large ZX as standard offering. For EMP rack, this function is available only when customer has connected air cooled condenser fans to rack controller. 2 This function is available on EMP Rack only when customer has connected liquid level switch as per wiring diagram on liquid receiver

17 Keyboard descriptions - Single button

Displays target set point; In programming mode, select a parameter Set or confirm an operation.

Hold for 5 seconds to reset any lockouts if the current state of the Reset Start controller allow for it to be reset.

Enter the fast access menu; In programming mode, browse the Up parameter codes or increases the displayed value.

In programming mode it browses the parameter code Down or decreases the displayed value

Service Enter the service and alarm menu.

Hold for 3 seconds to start a manual defrost or terminate an active Defrost defrost (Not available at the moment).

Keyboard descriptions - Combined buttons

Press and hold for about 3 seconds to lock (Pon) or unlock (Pof) the keyboard.

Pressed together to exit programming mode or menu; under rtC and PAr, this combination allows the user to go back to previous level.

Pressed together for 3 seconds allows access to first level of programming mode.

Pressed together for 3 seconds allows access to EXV manual setting.

Controller display upon start-up

Step Action Phenomenon and description

1 Power on controller All LEDs will light up for 3 seconds.

2 Firmware version will be displayed for 3 seconds.

Parameter setting file (bin file) identifier will be displayed for 3 3 seconds.

4 Normal display (actual suction temperature will be displayed)

18 Bin files number range

Bin number range Family

1-200 ZX

201-300 ZXB

301-500 ZXL

501-600 ZXD/ZXLD

601-620 EMPD

621-640 EMPLD

After installation and initial power on, it is critical to double check the parameters below:

RTC (Real Time Clock) setting

Step Action Phenomenon and description

1 Enter menu to select PAr (parameter) or rtC

2 Select rtC

n01, minute n02, hour 3 Press n03, day n04, month n05, year (last two digits)

4 Press Display actual value

5 Press Modify the value

Press SET: the value will flash for 3 seconds, then move to the next 6 Press value

7 Press Exit to rtC

8 Press Exit to main menu (or wait for 120 seconds and exit automatically)

19 Refrigerants

Step Action Phenomenon and description

1 Press Enter menu to select PAr (parameter) or rtC

2 Press Select PAr (parameter)

3 Press Confirm selection

4 Press Browse to parameter C07

5 Press Confirm selection

6 Press Select refrigerant to be used

The number will flash for 3 seconds and confirm the refrigerant 7 Press selection

8 Press Exit (or exit automatically after waiting for 120 seconds)

Evaporating temperature

Step Action Phenomenon and description

Press SET button for more than 3 seconds, the measurement units 1 Press > 3 seconds (°C) will flash together

2 Press Modify the number for target evaporating temperature

Press SET to confirm, the number wil flash for 2 seconds (or wait for 3 Press about 10 seconds to confirm)

20 Pr1 parameter (1st level) browse and modification

Step Action Phenomenon and description

1 Press Enter menu to select PAr (parameter) or rtC

2 Press Select PAr (parameter)

3 Press Confirm, select, and browse Pr1 parameters

4 Press Browse to Pr1 parameters

5 Press View the actual number of the Pr1 parameters

6 Press Modify the actual number of the Pr1 parameters

Press SET: the number will flash for 3 seconds and confirm the 7 Press modifications; Will go to the next Pr1 parameter

8 Press Exit (or exit automatically after waiting for 120 seconds)

21 Quick access menu browse - Sensor status and actual values

Step Action Phenomenon and description

Enter quick access menu, will display P1P (Press Up or Down to view 1 Press other sensors)

2 Press View the actual value of P1P

3 Press Change to next sensor code

4 Press Exit (or exit automatically after waiting for 60 seconds)

P1P Suction pressure sensor

P2P Condensing pressure sensor

P3t Digital compressor discharge line temperature sensor

P4t PHE vapor inlet temperature sensor

P5t PHE vapor outlet temperature sensor

P6t Ambient temperature sensor

P7t ON-OFF compressor discharge line temperature sensor

5H PHE superheat

oPP EXV opening percentage Sensor code and values descriptions LL5 Solenoid valve status (not used) (nP, noP, or nA means that the sensor does not exist; Std Condensing temperature set point Err means that the sensor fails, out of range, disconnected, Aoo Fan's analog output signal percentage or does not configure properly) Percentage of PWM output driving the valve of the Digital dso Scroll compressor Lt Minimum cold room temperature (unused)

Ht Maximum cold room temperature (unused)

tU1 #1 voltage sensor

tU2 #2 voltage sensor

tU3 #3 voltage sensor

tA` #1 current sensor

TA2 #2 current sensor

Hm Time menu

22 Access alarm code (Maximum of 50 record)

Step Action Phenomenon and description

1 Press Display SEC

2 Press Display A01

3 Press Display alarm code in A01

4 Press Display A02

5 Press Display alarm code in A02

6 ......

7 Press Exit (or exit automatically after waiting for 15 seconds)

23 Exact timing of the alarm

Step Action Phenomenon and description

1 Press Display SEC

2 Press Display A01

3 Press Display alarm code in A01

4 Press Display Hr

5 Press Display the alarm exact timing: hour

6 Press Display Min

7 Press Display the alarm exact timing: minute

8 Press Display dAy

9 Press Display the alarm exact timing: day

10 Press Display Mon

11 Press Display the alarm exact timing: month

12 Press Display yEA

13 Press Display the alarm exact timing: year

14 Press Exit (or exit automatically after waiting for 15 seconds)

24 Upload the program from the controller to Hot-Key

Step Action Phenomenon and description

Insert Hot-key when the 1 controller is on The uPL message will appear followed by a flashing End label (Note: 2 Press If Err is displayed, it means it failed to upload the program to hot- key. Please restart the process.)

3 Press End will stop flashing

Turn off the controller 4 and remove the Hot-key

5 Turn on the controller

Download the program from Hot-key to controller

Step Action Phenomenon and description

1 Turn off the controller

2 Insert Hot-key

The doL message will blink followed by a flashing End label (Note: 3 Turn on the controller If Err is displayed, it means it failed to download the program to Hot-key. Please restart the process.) Controller will restart working with the new parameters after 10 4 seconds

5 Remove Hot-key

25 Network wiring

Dixell XWEB300D serial address

• Connect to the ModBUS network using cable with 2 or 3 shielded wires, minimum section 0.5mm2 (e.g. BELDEN8772). • Do not connect shield to ground. • Do not connect the "Gnd" terminal. • Remember to draw a map of the line. This will help you to find an error if something is wrong. • RS485 devices are polarity sensitive.

Figure 9. Correct network wiring

Figure 10. Incorrect network wiring

26 Dixell XWEB300D Configuration

XWEB300D is compatible with CDU/Rack if XWEB has the library of Large ZX and EMP Rack CoreSense™ controller. Login into XWEB

• Go to Information Information • If this is not present, follow the steps below: • Open Dixell website (https://dixell.com/xweb300d-xweb500-xweb500d/eng/), then login (registration required) - Go to support System sw update XWEB300D XWEB500 XWEB500D - Download the upgrade package with your web browser, then login into XWEB - Go to information System Update Menu

Provide the XW5 patch file

Once the file has been selected wait until the upgrade procedure ends (XWEB reboots) Verify the installation ended succesfully by checking into the menu • Go to Information Information for string

• Go to Configuration Devices (drop down menu) • Go to Actions New • Enter the device name in the Name field (e.g. ZX CDU) • Select "XCM25D" in the Model field • Enter the ModBUS address in the RS485 Address field - Refer to setting of paramater "t01" in pr2 level in CoreSense™, default setting is "1" • Click New Termination resistor for XWEB300D

If XWEB300D is placed at the beginning or end of the line, please install its termination resistor by adding a jumper in position 2 (JMP2 on the back side of the unit). Do not add the jumper if XWEB300D is placed in the middle of the RS485 line.

27 Large ZX CDU / EMP Rack connected to XWEB300D

Large ZX CDU/EMP Rack connected to the Dixell XWEB300D with the Intelligent Store Solution module using RS485 Modbus.

Connect the ZX CDU to the ModBUS network as shown on figure 11.

Connect the network cable to the three-terminal connector on the XWEB300D port that has been configured as ModBUS port (COM 12, 13, 14).

Connect port "13" of XWEB300D to port "D0485 +" of CoreSense™ and port "12" of XWEB300D to port "D1485 -" of CoreSense for RS485 communication.

Figure 11. XWEB300D connected to the Intelligent Store Solution module

28 Installation

Large ZX CDU/EMP Rack are delivered with a holding charge of neutral gas. The condensing unit should be located in such a place to prevent any dirt, plastic bag, leaves, or papers from covering the condenser and its fins. The unit must be installed without restricting the airflow. A clogged condenser will increase the condensing temperature, thus reducing the cooling capacity, which leads to a high-pressure switch tripping. Clean the condenser fins on a regular basis. Electrical connection

Power supply

Large ZX CDU/EMP Rack electrical connection to the power supply must be made by qualified technicians, who should refer to the electrical diagrams located inside the electric connection panel. The units are designed for below power supply at ± 10% voltage tolerance. The circuit breaker must be switched off before opening the front panel.

Electrical wiring

Before commissioning, ensure the neutral "N" wire is connected to the terminal block ("N" furthest to the right). After proper connection of the ZX condensing unit, the control LED on the power board and control board will light up (see wiring diagrams for more details). Customers' wire size needs to be selected to allow for the maximum operation current of each unit.

Refrigeration piping installation

All interconnecting pipes should be of refrigeration grade, clean, dehydrated and must remain capped at both ends until installation. Even during installation, if the system is left for any reasonable period of time (e.g. two hours), pipes should be re-capped to prevent moisture and contaminants from entering the system.

Do not assume that the service connection sizes on the unit (at the service valves) are the correct size to run your interconnecting refrigeration pipes. The service valve sizes have been selected for convenience of installation, and in some cases (larger units), these may be considered too small. However, for the very short pipes within our units, these service connection sizes are adequate. All interconnecting pipes should be sized to satisfy the duty required.

The suction line of condensing unit or rack must be well insulated. Large ZX and EMP Rack are featured with vapor injection, thus the liquid line must be insulated too, because the liquid line can pick up additional heat from the ambient and adversely affect the sub-cooling desirable for the liquid refrigerant before it enters the expansion valve.

The pipe should be sized to ensure optimum performance and good oil return. The sizing must also take into account the full capacity range through which this particular unit will need to operate.

29 Pipe runs should be kept as short as possible, using the minimum number of directional changes. Use large radius bends and avoid trapping of oil and refrigerant. This is particularly important for the suction line. The suction line should ideally slope gently towards the unit. Recommendation slope is 1/200~1/250. P traps, double risers and reduced pipe diameters may be required for suction lines where long vertical risers cannot be avoided.All pipes should be adequately supported to prevent sagging which can create oil traps.

The recommended pipe clamp support distance is shown below:

Tube size Max distance between two clamp supports

12.7 mm (1/2 inch) 1.20 mm

16.0 mm (5/8 inch) 1.50 mm

22.0 mm (7/8 inch) 1.85 mm

28.5 mm (1 1/8 inch) 2.20 mm

34.93 mm (1 3/8 inch) 2440 mm

Suction filter

When brazing, the system should be protected with an inert gas such as nitrogen at a very low pressure. Only materials and components approved for refrigeration engineering are suitable.

It is necessary that all impurities (dirt, brazing scale, flux, etc.) are removed from the system before operation to avoid breakdowns. Many of these impurities are so small that they can pass through a filter and enter the suction side of the compressor. Other blockages can occur in the suction filter, and a high pressure drop can cause damage. For this reason, it is strongly recommended the usage of a large suction filter (which causes only a minimal drop of pressure) on all installations which are to be assembled on site in cases where the required cleanliness cannot be guaranteed. The suction filter core is highly recommended to be changed after first time 72 hours commissioning.

For selection of Emerson flow controls STAS filter drier for Large ZX or EMP Rack please contact Application Engineering in your region. STAS Series Liquid line insulation

Large ZX and EMP Rack are featured with vapor injection, the liquid line must be insulated with at least 19 mm thick, to avoid sub-cooling loss through heat absorption from ambient.

30 Brazing recommendations

Maintain a flow of oxgen-free nitrogen through the system at a very low pressure during brazing. Nitrogen displaces the air and prevents the formation of copper oxides in the system. If copper oxidization is allowed to form, the copper oxide material can be swept later through the system and block screens such as those protecting capillary tubes, thermal expansion valves, and accumulator oil return holes. This minimizes any entry of contaminants and moisture.

• Remove the liquid line connetion cap.

• Then remove the suction connection cap. OUTSIDE INSIDE UNIT • Open both valves midway. Care should be taken to avoid the holding charge from releasing too quickly. • Be sure that tube fitting inner diameter and tube outer diameter are clean prior to assembly. End of Tube • Since both tubes are extended from the condensing unit housing, we recommend insulating the housing During brazing During brazing by using a wet cloth on the copper tubing. pull back fire protect housing with insulation • Recommended brazing materials: damp cloth a copper/ phosphorous or copper/phosphorous/ silver alloy rod should be used for joining copper to copper whereas to join dissimilar or ferric metals, use a silver allloy rod, either flux coated or seperate. • Use a double tip torch.

Expansion valve selection for low ambient application

For systems expected to operate in varying ambient conditions - namely summer and winter temperatures - the expansion valve (TXV or EXV) sizing should take into consideration the maximum expected saturated condensing temperature at high ambient conditions (summer) and the minimum expected saturated condensing temperature during low ambient conditions (winter).

The chosen expansion valve's operating capacities should all be well within these limits to ensure satisfactory system performance

The liquid refrigerant from the low temperature ZXLD and EMPLD unit / rack in liquid line is subcooled to very low temperature when it goes through PHE, so system expansion valve selection should take it into consideration. The table below lists the reference liquid line temperature.

Standard supply temperature °C R404A

Ambient temperature °C Evaporation temperature °C 20 27 32 38 43 48

-40 -8 -1 3 8 13 19

-35 -4 2 6 11 15 21

-30 0 6 9 13 18 23

-25 5 10 13 17 21 26

-20 9 14 17 20 24 30

-15 13 18 21 24 28 34

31 Location and fixing

Large ZX and EMP Rack should always be installed in a location free of other source of heat radiation and not be blown by wind in winter time. The place should have clean air circulation. The minimum operating space for unit or rack are described in below figures. Where multiple units or racks are to be installed in the same location, the contractor needs to consider space for each equipment carefully. The installation location should avoid the affecting to surrounding residents, without air blows directly to residents’ windows.

The units or racks should be mounted on a solid concrete slab with anti-vibration pads between unit/rack feet and concrete. When the installation location is easy of water accumulation, the mounting base should have a certain height of cement base station at about 300 mm. At snowy areas, there should be additional cover be installed on top of the unit/rack besides a cement base in the bottom. The snow cover should be mounted at least 1500 mm higher than top of the unit/rack. >1500mm

Air flow direction

Power connection side 1120mm

1620 mm

>400 m

>800 m >800 m 950 mm 980 mm

>400 m

1090 mm

Figure 12. Large ZX Fixing

32 >1500 mm

Power connection side 1040 mm

1640 mm

>400m

>800m >800m 950mm 980mm

>400m

1090mm

Figure 13. EMP Rack Fixing

33 Lifting of Unit/Rack

Condensing unit and rack should always be kept vertical during transportation or operation. Refer to the figures below for the lifting method.

Center line

Center of gravity 70 mm 1620 mm

Center line

46 mm

Center of gravity

1640 mm

34 Start Up and Operation

Before commissioning, make sure that all valves in condensing unit or rack are fully opened. Make sure that each protector's wiring is normal and in working condition.

Leak detection and pressure holding

During pressure holding, the high pressure should be less than 18 barg, and the low pressure should be less than 12 barg. Vacuum method is also allowed to detect leaks.

Vacuuming

Do not use the compressor to vacuum the system!

The evacuation procedure is based upon achieving an actual system vacuum standard and is not time dependent. Before the installlation is put into commission, it has to be evacuated with a vacuum pump. Proper evacuation reduces residual moisture to 50ppm. The installation of adequately sized access valves at the furthest point from the compressor in the suction and liquid lines is advisable. To achieve undisturbed operation, the compressor valves are closed and the system is evacuated down to 0.3 mbar/0.225 Torr. Pressure must be measured using a vacuum pressure (Torr) gauge on the access valves and not on the vacuum pump; this is done to avoid incorrect measurements resulting from the pressure gradient along the connecting lines to the pump.

Before vacuuming, make sure the manual valves are opened. Please refer to the figure on the right, vacuum Point Point Point operation must be performed separately from points A, A B C B and C.

Refrigerant charging procedure

The scroll compressor design requires system charging as quickly as possible with liquid refrigerant into the liquid line. This will avoid running the compressor under conditions where there is insufficient suction gas. Sufficient gas is available to cool not only the motor but also the scrolls. Temperature builds up very quickly in the scrolls if this is not done. Do not charge vapor refrigerant into Large ZX condensing unit or EMP Rack. The suction service valves must be fully opened at any time while the compressor is running.

Refrigerant should be fully charged before start-up. The best filling port is at the liquid line service valve. If one-time charge from liquid line is not enough, charging the refrigerant at compressor running may cause to multiple pressure cut off and delayed restart, during which by-pass the low-pressure control and low-pressure protection are prohibited.

For charging adjustment, it is recommended to check the liquid sight glass just before the expansion valve.

For Large ZX unit and EMP rack, configured with PHE sub-cooler, please charge liquid refrigerant from point C. After starting up, you can continue to charge liquid refrigerant from point A. When there is insufficient refrigerant charge, there is gas in the moisture indicator, the controller will show E47 (electronic expansion fully open) or E48 (injection shortage) warnings. After there is no gas bubble in the moisture indicator, please continue to charge about 1 kg of refrigerant.

35 Oil charging procedure

Emerson Large ZX and EMP Rack are supplied with oil charge in compressor at the factory. Please confirm the oil level in the oil sight glass of the compressor after a short period of trial operation. If the oil level is above half of the sight glass, it can be considered sufficient oil. If oil charging is needed, charge oil through the needle valve port on the suction service valve.

When the length of one-way pipeline exceeds 20m, it is necessary to add appropriate quantity of lubricating oil, refer to the following table:

Pipe outer diameter Refueling (ml/m)

12.7 mm (1/2 inch) 10

15.9 mm (5/8 inch) 20

19.0 mm (3/4 inch) 30

22.0 mm (7/8 inch) 40

25.4 mm (1 inch) 50

Qualified refrigerant and oil

Refrigerant Oil

Emkarate RL 32 3MAF R404A Mobil EAL Arctic 22 CC

Maximum compressor cycle

Maximum permitted starts per hour is 10

36 Check before starting & during operation

• Check all the valves are fully opened, to prevent trapping liquid. • After starting and running stable, it is recommended to check the compressor oil level to confirm whether it is necessary to refuel the oil (halfway up the sight glass). • Discharge line temperature should be lower than 125°C, discharge pressure should be lower than 28 barg, and the operating current is within the normal range. • The oil sump temperature at the bottom of the compressor should be within the safe range shown in the figure below:

Evaporation temperature (°C) -20 -15 -10 -5 0 5 10 100

90 30 80

Safe Area Feasible Oil sump temperature (°C) 70 20

50 10

40 Insecure area 0 30

Oil sump temperature (°C) temperature sump Oil (Excessive cooling diluent)

20 -10 10

0 -10 0 10 20 30 40 50 Evaporation temperature (°C)

37 Alarm Codes

Level Description The unit (including the compressor) will keep running, but some status & data is already in an Warning unsafe range; alarm dry-contact will not close; reset automatically The unit (including the compressor) may run not with full functions; alarm dry-contact will Alarm not close; reset automatically The unit (including the compressor) stops working; alarm dry-contact will close; manual reset Lock is needed

Code Description Possible Reasons Action Reset

Suction pressure Digital compressor Reset automatically when E01 Sensor failure or overrange sensor failure alarm operates in preset mode the sensor is working

Condensing pressure Function: fan speed Reset automatically when E02 Sensor failure or overrange sensor failure alarm control is disabled the sensor is working Digital compressor Function: discharge Reset automatically when E03 discharge line temperature Sensor failure or overrange temperature protection is the sensor is working sensor failure alarm disabled PHE vapor inlet Function: PHE superheat Reset automatically when E04 temperature probe Sensor failure or overrange control is disabled the sensor is working failure alarm PHE vapor outlet Function: PHE superheat Reset automatically when E05 temperature probe Sensor failure or overrange control is disabled the sensor is working failure alarm Ambient temperature Reset automatically when E06 Sensor failure or overrange Related functional disabled probe failure alarm the sensor is working Fixed-speed compressor Fixed-speed compressor discharge line Reset automatically when E07 discharge line temperature Sensor failure or overrange temperature protection the sensor is working sensor failure alarm function disabled 1# current sensor Current protection Reset automatically when E09 Current overrange fault alarm function disabled the sensor is working 2# current sensor Current protection Reset automatically when E10 Current overrange fault alarm function disabled the sensor is working 1# voltage sensor Voltage protection Reset automatically when E11 Voltage overrange fault alarm disabled the sensor is working 2# voltage sensor Voltage protection Reset automatically when E12 Voltage overrange fault alarm disabled the sensor is working 3# voltage sensor Voltage protection Reset automatically when E13 Voltage overrange fault alarm disabled the sensor is working One or two phases of the compressor power supply The compressor will be Automatically E20 Missing phase alarm are missing or the tripped with time delay voltage sensor is working abnormally The compressor will be Missing phase alarm Press "Start" > 5 seconds L20 Missing phase lock tripped and the unit happened frequently or manually power cycle will be locked The compressor will be Wrong phase sequence Compressor power supply Press "Start" > 5 seconds L21 tripped and the unit lock has wrong sequence or manually power cycle will be locked

38 Code Description Possible Reasons Action Reset

Three-phase 3-Ph voltages are E22 no no imbalance warning not balanced Digital compressor over Digital compressor current The compressor Automatically E23 current alarm is larger than settings will be tripped with time delay Digital compressor over The compressor will be Digital compressor over Press "Start" > 5 seconds L23 current alarm happens tripped and the unit current lock or manually power cycle frequently will be locked Voltage is lower than The compressor Automatically E26 Low voltage alarm settings; or voltage will be tripped with time delay sensors do not work The compressor will be Low voltage alarm Press "Start" > 5 seconds L26 Low voltage lock tripped and the unit happens frequently or manually power cycle will be locked Voltage is higher The compressor Automatically E27 Over voltage alarm than settings will be tripped with time delay The compressor will be Over voltage alarm Press "Start" > 5 seconds L27 Over voltage lock tripped and the unit happens frequently or manually power cycle will be locked Digital compressor built-in Digital compressor The digital compressor Automatically E28 protector opens alarm built-in protector opens will be tripped with time delay Fix speed compressor Fix speed compressor over The compressor Automatically E31 current is larger current alarm will be tripped with time delay than settings Fix compressor The compressor will be Fixed speed compressor Press "Start" > 5 seconds L31 over current alarm tripped and the unit over current lock or manually power cycle happens frequently will be locked Fix speed compressor Fixed speed compressor The digital compressor will Automatically E32 built-in protector built-in protector opens be tripped with time delay opens alarm High pressure The digital compressor Automatically when HP E40 High pressure switch alarm switch is open will be tripped switch closes The compressor will be High pressure switch alarm Press "Start" > 5 seconds L40 High pressure switch lock tripped and the unit happens frequently or manually power cycle will be locked Automatically when Low pressure The digital compressor E41 Low pressure switch alarm LP switch closes and switch is open will be tripped time delay Automatically when Digital compressor Digital compressor The digital compressor will discharge temperature is E44 discharge line temperature Discharge temperature is be tripped lower than settings and overheating alarm higher than settings time delay Digital compressor Digital compressors high The compressor will be Press "Start" > 5 seconds L44 discharge temperature discharge temperature tripped and the unit or manually power cycle overheating lock alarm happens frequently will be locked Automatically when High condensing Condensing temperature E46 no condensing temperature temperature warning is higher than settings is lower than settings Less refrigerant charge or Automatically reset when E47 EXV full-open warning no leakage the EXV is not fully open Automatically when Less refrigerant charge or E48 Less injection warning no PHE super heat is leakage smaller than settings Automatically when the difference of discharge High side liquid back Suction liquid back or temperature and E50 no warning injection too much condensing temperature is higher than settings and time delay

39 Code Description Possible Reasons Action Reset

Automatically when Fix speed compressor Fix speed compressor The digital compressor discharge temperature E55 discharge line temperature Discharge temperature is will be tripped is lower than settings overheating alarm higher than settings and time delay

Fix speed compressors Fix speed compressor The compressor will high discharge tem- Press "Start" > 5 seconds L55 discharge temperature be tripped and the unit perature alarm happens or manually power cycle overheating lock will be locked frequently

Compressor oil The digital compressor Automatically with E56 Compressor lack of oil shortage alarm will be tripped time delay

The compressor will Compressor oil Compressor lack of oil Press "Start" > 5 seconds L56 be tripped and the unit shortage lock alarm happens frequently or manually power cycle will be locked

The time is configured for Automatically when finish E80 RTC warning no the new controller time configuration

Communication error Automatically when the E81 RTF warning between MCU and no communication recovers unit clock

Automatically when Probe configuration The same probes E82 no the probes are error alarm are configured configured correctly

Automatically when Digital inputs The same digital inputs E83 Related functional failure the digital inputs are configuration error alarm are configured configured correctly

Digital compressor Manually power off Compressor and solenoid valve The compressor and power on after E84 configuration error alarm configuration does will not work the compressor not match configuration is right

Automatically when Injection probe EXV and injection E85 EXV will not work injection probe is configuration error alarm configuration dnot match configured correctly

Hold “start” button for 5s or manual power off and The compressor EEPROM read/write Write/read error on, alarm will disappear L86 will tripped and the unit error lock into EEPROM when the communica- will be locked tion between MCU and EEPROM is success.

40 Troubleshooting

1 Digital compressor 2 Fixed-speed compressor

Fault phenomenon Direct cause Inspection analysis and adjustment

Before the following troubleshooting, first of all ensure the correctness, robustness and reliability of all wiring.

Check whether the low pressure reaches the low pressure set point Check terminal No. 3 and NEUTRAL neutral line for 220VAC The controller did not receive a start signal Check whether the wiring of terminal block No. 3 to controller input DI1 is reliable Normal shutdown will not start within 3 minutes, waiting time exceeds 3 minutes Check whether the contactor coil A1 has 220V AC. If there is 220VAC, check the virtual connection of the compressor Contactor failure or wiring failure terminal and the contactor coil terminal or replace the contactor; if no 220VAC, check if the controller C2 FireWire is connected properly Controller failure Replace the controller Need to confirm that the power supply voltage and Electricity failure waveform are normal 1 The fuse is blown Replace the fuse and monitor the current after restart Compressor Need to confirm whether over current, whether leakage, does not start Air switch trip grounding is normal, whether the air switch itself is faulty Need to confirm whether the contact is stuck, whether the Contactor failure 1 starting voltage is insufficient Unit control is in protection status Check whether it is a true protection action or a malfunction (alarm code display) due to a fault code Not bright / flashing, Power supply phase error (L21) Refer to Article 14 [Phase of three phases] Related Content Compressor does not start Power Phase Loss (E20 or L20) Refer to Article 13 [Three-phase phase loss] Related content Need to confirm whether there is a virtual connection of Three-phase voltage imbalance the power line, whether it is used in a phase of high-power single-phase lectrical appliances Compressor Overcurrent 1 (E23/L23: Digital Compressor, E31/L31: Refer to Article 15 [Overcurrent Errors] Related Content Constant Speed Compressor) Long bright, Exhaust pressure too high protection Refer to Article 2[Exhaust Pressure High Protection] Related But the compressor (E40 or L40) Content does not start Inspiratory pressure too low protection Refer to Sections 3, 4 [Insufflation Pressure Protection] (E41) Related Content Excessive exhaust temperature protection Refer to Article 5 [Exhaust temperature protection is too (E44/L44: digital compressor, high] Related content E55/L55: fixed speed compressor) Need to confirm whether it has reached the temperature set User-side temperature controller instruction point, whether it enters the defrost program, whether the shutdown thermostat is faulty Need to confirm the controller display is on replace the Controller failure or transformer failure controller to see if the fault still exists Built-in compressor protection (E28: digital Refer to Article 15 [Controller Output Run Command but compressor, E32: fixed speed compressor) No Compressor Current Detected] A) Check whether the power supply voltage deviation meets Power supply voltage is too low the unit usage requirements A) Confirm that the capacitor wiring and specifications are Capacitor failure correct (refer to the unit wiring diagram) B) Check if the capacitor is damaged

41 Fault phenomenon Direct cause Inspection analysis and adjustment

If the high pressure is high (high pressure protection value 30 kg): Shutoff valve or other system valve One-by-one confirmation of system processes forgot to open Improve ventilation and ensure that the return air The ambient temperature is too high temperature of the condenser is equal to the ambient or the air intake channel is blocked temperature outside the building, ensure sufficient airflow space before and after the unit. Reference No. 12 [Condensing fan does not operate, or Condensing fan is working abnormally operates abnormally Dirty condenser surface Sweep condenser For non-azeotropic refrigerants, such as R404A, release 2 some of the refrigerant from the stop valve of the Too much refrigerant Code "E40 or L40" liquid tube, and use slow release to prevent excessive Discharge pressure loss of the lubricant. High protection There may be intermittent air bubbles in the sight or lock Air inside the system glass. If it is confirmed that air is in system, need to remove air (re-vacuum and add refrigerant) A) Check throttling device is normally open Over-throttle B) Choosing throttling device is too small Short-circuit the two ends of the controller directly High pressure switch failure to connect the high pressure switch, and confirm whether the high pressure switch is damaged If the "E40 or L40" is reported at the same time the fan is not working, please check: FireWire to C2 port is open all the way 1. If the two fuses next to the contactor are damaged; 2. Check the terminal block and the controller under the line wiring for loose or wrong connection Controller failure Controller shows error, replace controller 3 The controller for medium tempearure unit ZXD and Code "E41" Wrong controller the low temperature unit ZXLD must be used in one- suction pressure to-one correspondence. Low protection Ensure that the low pressure switch should be closed (limited to medium Low pressure switch and wiring fault temperature unit) (turned on) when the low pressure is greater than 1 kg Shutoff valves in the system does not Check the system valves one by one open properly Need to confirm whether the charge is insufficient, System lack of refrigerant whether the system leaks. If the system leaks, need to find leak point and handle properly Need to confirm whether the evaporator fan and the motor are abnormal, whether it is defrosting, Abnormal evaporator, heat exchanger defrosting is not clean, whether the drainage is not is too small smooth, and whether the sundries obstruct the airflow 4 passage. Suction pressure is too low Whether the expansion valve is blocked or if the Expansion valve opening is too small expansion valve is improperly adjusted. Whether temperature package leaks Need to confirm whether filter is dirty, if it is blocked Filter plugging, suction pipe pressure by ice, if it needs to be replaced, replace the filter or drop too high replace the filter core Evaporator selection is too small, or the expansion valve selection is too small, or the unit selection is too Part selection deviation large. Recheck the load and select the model. Whether medium temperature units are used for low temperature applications

42 Fault phenomenon Direct cause Inspection analysis and adjustment

Measure operating low pressure. Need to confirm whether the low pressure set in controller is correctly, whether the controller or low pressure switch is faulty. Low pressure during normal operation If there is a fault, replace the corresponding device. Also refer to [3. suction pressure Low protection ] Related Content

To measure the operating high pressure, make sure that the high pressure switch is working properly. If High pressure during normal operation there is a fault, replace the corresponding device. Also refer to [2. Discharge pressure High protection Or lock]

Need to confirm whether there is lack of refrigerant, whether the opening of the expansion valve is too Suction superheat is too high small, whether insufficient insulation of the suction pipe 5 A) The need to confirm whether the electronic Code "E44/L44" expansion valve failure: coil damage, dirty or ice Digital compressor blocking. discharge B) Need to confirm if the filter before the electronic gas overheating expansion valve is blocked. alarm or locked C) It is necessary to confirm whether the inlet/ temperature sensor for PHE is faulty or missing. Injection system failure Code "E55/L55" Refer to the sensor temperature-resistance Fixed speed characteristics table in this manual. compressor discharge D) It is necessary to confirm whether insufficient gas overheating charging leads to gas-liquid two-phase in the liquid alarm or locked pipe, so that the injection circuit cannot take liquid properly. E) Need to confirm if the controller is faulty. Refrigerant mixed with impurities, Re-evacuation and charge of qualified refrigerant refrigerant composition changes 1, the sight glass should be full glass status. 2, the liquid pipe should have sufficient subcooling. System lacks of refrigerant Need to confirm whether the charge is insufficient, whether the system leaks. If leaks need to find leak point and handle properly

It is necessary to confirm whether the compressor Compressor failure current corresponds to operating high and low pressure. If not, the compressor may have worn

Discharge temperature sensor and Check if the sensor fails and check if the sensor falls wiring fault (measured discharge out. Refer to the sensor temperature-resistance temperature is less than 125 degrees) characteristics table in this manual Need to confirm whether the expansion valve is Expansion valve opening too large 6 oversized and whether it is excessive opening The system continues Need to confirm whether the evaporator fan and the to have liquid, back motor are abnormal, whether it is defrosting, Abnormal evaporator, Suction superheat defrosting is not clean, whether the drainage is not heat exchanger is too small less than 5K smooth, and whether the sundries obstruct the airflow (such as frost o passage. compressor body For non-azeotropic refrigerants, such as R404A, release in medium some of the refrigerant from the stop valve of the Too much refrigerant tempearature unit ) liquid tube, and release slowly to prevent excessive loss of the lubricant.

43 Fault phenomenon Direct cause Inspection analysis and adjustment

If the compressor starts frequently during the defrosting process: Need to confirm whether the unit selection is too Operating suction pressure large, the expansion valve selection is too small. low due to low load Consider taking all indoor evaporator synchronization defrosting procedures Check if the low pressure rises during stop, replace the Leakage of liquid line solenoid valve corresponding equipment (coil or valve body) when confirming the failure of the solenoid valve. Measure the pressure change at compressor suction and evaporator outlet during the shutdown process. Too much pressure drop in suction It may be that the compressor suction pressure has piping decreased to the stop setting and the evaporator side liquid refrigerant has not completely evaporated. Need to improve piping design If the compressor is frequently started during normal operation: 7 Frequent It is normal phenomenon. At first time start after compressors power on or over 1 hour shut off, the unit is in initial start up The unit is at initial startup start procedure, during which the compressor will strat up 3 times with 3 seconds running in each time, each time with 20 seconds interval. Refer to [Compressor overcurrent], [Discharge Frequent compressor protection pressure high pressure], [Suction pressure too low (alarm code display) protection], [Discharge gas overheating] related content for detailed system check Check if the temperature difference between the start and stop of the thermostat is too small, and whether Thermostat failure the thermostat fault frequently issues a stop command. If there is a fault, replace the corresponding device Controller failure Try to replace the controller and see if the fault persists Measure operating low pressure. Need to confirm whether the low pressure set is correctly, whether the Low pressure during normal operation low pressure switch is faulty? If there is a fault, replace the corresponding device. Also refer to the relevant content of Article 3 [suction pressure Low protection]

44 Fault phenomenon Direct cause Inspection analysis and adjustment

Compressor reverse running Swap any two-phase wiring Check if the high-pressure pressure is running high, The compressor is overloaded whether the low-pressure pressure is low, and whether the pressure ratio is too large. The compressor oil level is Confirm the oil level and perform too low or too high oil drain or replenishment Release some of the refrigerant from the Too much refrigerant stop valve liquid line slowly to prevent excessive loss of lubricating oil Continuous liquid back Check if compressor oil tank temperature is low Check whether the compressor crankcase System with liquid start heater is working during compressor stops and whether the liquid solenoid valve leaks. Check if the compressor current corresponds 8 to operating high and low pressure. Compressor internal failure Abnormal noise If it is too high, it may indicate that the inside of the compressor may have worn Try to press each pipe, bracket, housing, condenser, etc., and observe if the noise Unit resonance changes. After confirming the source of noise, reinforce, separate, or add sponge cushions to the corresponding parts. Ensure that the space around the unit is clean and Unit contacts surrounding objects open, and that the unit body does not touch other objects (such as wires, sundries, etc.) Re-confirm that the feet of the unit are Unit installation is loose firmly installed, no nuts in loose and no feet are impending Low Ambient Kit (BOM-*81) should be Low condensing pressure selected in extremely low ambient areas, check if the fan speed control is normal Check if the unit operating is normal by checking if high pressure, low pressure, current, discharge temperature, return gas temperature, The unit is operating normally oil temperature are within a normal range. If yes, it is possible that the outdoor or indoor equipemnt selection is too small, and the system needs to be redesigned. Refer to above related content Unit protection for detailed system check The compressor itself is Refer to section 1[Compressor does not start] working abnormally for detailed system check] 9 The liquid line should be full of liquid Cooling capacity Flash gas before system before expansion valve (sight glass should cannot meet load expansion valve demand be installed before the expansion valve) Liquid supply pipe insulation The liquid supply pipe should be for units with PHE well insulated for units with PHE 1, the sight glass should be full glass liquid 2, (for units with PHE) The liquid pipe should have sufficient subcooling, check whether the charge is System lack of refrigerant insufficient and whether the system is leaking. If the system leaks, need to find leaking point and fix it Check the working status of the evaporator, Abnormal application status check if the cooler's door is closed, check the goods temperature when putting into the cooler

45 Fault phenomenon Direct cause Inspection analysis and adjustment

Circuit breaker cannot be When the breaker is closed, the breaker has turned on after closing 380V input voltage and output voltage Natural wiring error Any line-to-neutral voltage is 220VAC 10 Whether the two fuses next to Broken fuse Controller has the contactor are damaged no display Measure whether the transformer input has 220V voltage and whether the output has Transformer damage 24V voltage. If the output is abnormal, replace the transformer. Power off and power on the unit, after Controller code does not 11 re-start the controller, if the fault change or garbled Controller does disappears, the fault can be ignored. not work Controller failure If the fault continues, replace the controller Check if the fan blade is damaged Check if the fan blade is damaged Fan should be connected to fan capacitor Check if fan motor malfunctions and wired to 220VAC; check if fan motor failure or fan capacitor failure 12 Fan should be connected to fan capacitor The condenser fan Check if the fan capacitor is damaged and wired to 220VAC; check if fan motor is not running, failure or fan capacitor failure or in abnormal Note: The condensing fan speed control is based operation on the condensing temperature collected, when condensing temperature sensor failures, will use If above causes are excluded, ambient temperature sensor for speed control, replace the controller if both sensors fail, the fan will be fully open. Refer to the sensor temperature-resistance characteristics table in this manual Check the label of the unit and check whether the 13 parameters of the controller H25 are set correctly. Code "E20" or "L20" Controller H25 parameter setting error The three-phase power is set to Yes and the three-phase phase single-phase is No. Please pay special attention missing to this after replacing the controller Check the three-phase incoming line The phase sequence of the unit of the unit and exchange the two phases incoming 3-ph lines is incorrect 14 of the breaker input line. Code "L21" Check whether the three-phase input of R, S, T in the three-phase lower left corner of the controller is consistent with phase Fault Controller three-phase error the phase sequence on the terminal of the compressor (U, V, W). Take special attention when replacing a new controller.

46 Fault phenomenon Direct cause Inspection analysis and adjustment

Measure the resistance between the terminals of the compressor to determine if the resistance is infinite and whether the three-phase resistance is balanced. After the compressor is fully cooled, try to start again. Built-in compressor protection If normal operation can be performed again, please refer to [Compressor overcurrent], [Discharge pressure high protection], [Suction pressure low protection] and [Discharge gas overheating] to perform detailed 15 system checks. Code "E28" Measure the resistance between the terminals of the controller outputs compressor. If it is confirmed that the compressor is digital compressor faulty, replace the compressor.After restarting, you operation Compressor motor burned must refer to [Compressor overcurrent], [Discharge instructions, pressure high protection], [suction pressure low No current detected protection], [Discharge gas overheating] to perform detailed system checks. Code "E32" Need to confirm whether the current is too high, controller outputs whether the noise is high, with or without abnormal fix speed compressor noise. If it is confirmed that the compressor is faulty, operation command, replace the compressor. After restarting, you must No current detected Compressor mechanical failure refer to[Compressor overcurrent], [Discharge pressure high protection], [suction pressure low protection], [Discharge gas overheating] to perform detailed system checks. Check the three-phase voltage at the lower end of the Contactor and wiring fault contactor to determine whether there is loose or virtual connection, and replace the contactor. Controller failure Replace the controller. Check whether the controller H07/H09 (digital compressor) and H27/H28 (fix speed compressor) 16 Controller current protection setting parameter values are consistent with the unit label. Code "E23/L23" wrong Especially when replacing a new controller, adjust the Digital Compressor controller parameters to match the unit's labeling Over current alarm requirements. or lock Check the three-phase voltage at the lower end of the contactor to determine whether there is loose or Contactor failure Code "E31/L31" virtual, resulting in excessive current due to missing Fix Speed Compressor phase. Over current alarm Measure the actual operating current of the or lock compressor, and determine whether the operating Internal damage to the compressor current is too high by refering to the high and low pressures. 17 Code "E03"(digital Discharge line temperature sensor Check if the temperature sensor is out or the heat compressor), "E07" falls out or is not heat insulated well insulation is not good (fix speed compressor) discharge line It is recommended to replace the temperature sensor temperature The sensor itself fails directly sensor error Find out why the pressure is abnormal, like if there is Actual suction pressure exceeds the no refrigerant in the system, or if the refrigerant is too transducer measuring range 18 much, so the pressure in the suction is too high. Code "E01" Suction pressure transducer Check if the sensor wiring is normal and there is no failure Pressure is normal, sensor blockage in the pressure tube where the sensor is connection or sensor itself fails located. Try replacing the sensor to see if it can eliminate the fault.

47 Fault phenomenon Direct cause Inspection analysis and adjustment

Check whether the external device has remote communication with the controller, and whether there is any abnormality in the remote communication 19 wiring and signal transmission. If the signal continues Code "L86" Controller to be written into the controller, it will cause its Controller internal memory is abnormal internal memory memory to be damaged, and each writing requires a EEPROM is abnormal write completion instruction. Try to restart the controller if it can be solved. After the above troubleshooting, if the controller is still abnormal, replace the controller.

Temperature Sensor Resistance Table

Temperature ( °C) -30 -10 25 60 80 100 120

Discharge line temperature 1522k 457k 86k 21k 11k 5.8k 3.4k sensor resistance (Ω)

Condensing tempreature, PHE vapor inlet and outlet temeprature and ambient 111k 67.7k 42.5k 27.3k 17.9k 10k 5.82k temperature sensor resistance (Ω)

48 Wiring diagram

ZXD/ZXLD Condensing Unit

49 EMPD/EMPLD Rack 2

40V A WH BU 24VAC 2

0 P3 40V A 24VAC &86720(5&211(&7,21 WH BU

2 IL LEVEL 2 N30 Transformer 2 2 BK OG OM 3O CONTROLLE R2 N Transformer 1

23 YE 1 BK OG AL 2

5A BU 1 22 DO 5 ALAR M

250VAC

F5 N

AL 1 0 21 P3

DO 1 R TRANSDUCE P. SUCTION AI 1 20 1 IL LEVEL C1

19 N30

DISCHARGE P. TRANSDUCE P. DISCHARGE

R 2 AI 2 1 BN

DO 2 18

BU CONTROLLE R1 OM 3O

RD BU DIGITAL COMP. DLT SENSOR DLT COMP. DIGITAL 1 AI 3 17 DO 3

2 BN

PHE VAPOR-IN SENSOR VAPOR-IN PHE YE 5 AI 4

DO 4C

4 PHE VAPOR-OUT SENSOR VAPOR-OUT PHE WHITE NC AI 5 DI 1 14

BN BK AMBIENT SENSOR AMBIENT 2 13 AI 6

LEVEL SWITCH

3 K BLAC

2 BU

FIXED COMP. DLT SENSOR DLT COMP. FIXED

AI 7 BN

1 11

2 P CONTROLLE R BU NEUTRA L 1

P ONLY ZXD

PW M DI 3

HP Switch BK

9 1 LP BK -

LP Switch + BU SOLENOID VALVE 8

VN R TO 2 RD

+ - YE

2 6 COPACITOR

RS485 G TO 1 BU

RD 2 T T1 T2

COMMUNICATE

EXV OG

4 YE EXV S EV

RD BU 3 R H- K M2

N r Transforme FAN MOTOR N E

1 CAPACITOR

BU 1

) F4(4A OG

RD BU

) F3(4A M1

2 RD ) F2(4A

FAN MOTOR

YE E

) F1(4A BK

YE 2 FN BN 2

56 FAN CONTROLLE R RD NO *5((1 5HOD\ K not shown in harnesses for clarity. 2.Neutral "N" and Earth "E" wirings ar ATTENTION:Unit NOTES: 1.Dashed line " is wired by installer . Must Be Grounded! 1 1250$/ /(9(/ Crankcase Heater 5('

722/2: /(9(/

A1 A2 BK YE

21N/C 22N/C OG

YE 2 PHE COIL 2

2018-09-20 14/NO

13 RD 052-3198-01 RD

2 2 E

5/L3 6/T3

RD RD

RD 2 T3(W )

3/L2 4/T2

YE YE YE 2

T2(V)

MC 2

COMP' R

FIXED

1/L1 2/T1

BU BU 2

2 Breaker Circuit

T1(U ) 2 2 Contactor E AL 1 DO 5 1 AL 2

E GNYE

E BK NP

RD A1 A2 BK

h RD WN

Crankcase Heater

21N/C YE 22N/C OG

RD PHE COIL 1 1 L3

14/NO 13 YE RD

1 RD 1 V E

5/L3 6/T3 RD RD RD YE 1 T3(W ) VW L2

3/L2 4/T2

YE YE YE BU 1

T2(V)

MC 1

1/L1 2/T1

BU BU BU

BU 1 COMP' R DIGITA UU L1

Circuit Breaker Breaker Circuit T1(U ) 1 Contactor E TFD- 380/420V, 50Hz, 3P EMPD/EMPLD Rack Wiring Diagram

50 General information

Technical data are correct at the time of printing. Updates may occur, and should you need confirmation of a specific value, please contact Emerson clearly stating the information required. Emerson cannot be held responsible for errors in capacities, dimensions, etc., stated herein. Products, specifications and data in this literature are subject to change without notice. The information given herein is based on data and tests which Emerson believes to be reliable and which are in accordance with today’s technical knowledge. It is intended for use by persons having the appropriate technical knowledge and skill, at their own discretion and risk. Our products are designed and adapted for fixed locations. For mobile applications, failures may occur. The suitability for this has to be assured from the plant manufacturer, which may include making appropriate tests.

Note: The components listed in this catalogue are not released for use with caustic, poisonous or flammable substances. Emerson cannot be held responsible for any damage caused by using these substances.

About Emerson

Emerson (NYSE: EMR), headquartered in St. Louis, Missouri (USA), is a global technology and engineering company providing innovative solutions for customers in industrial, commercial, and residential markets. Our Emerson Automation Solutions business helps process, hybrid, and discrete manufacturers maximize production, protect personnel and the environment while optimizing their energy and operating costs. Our Emerson Commercial and Residential Solutions business helps ensure human comfort and health, protect food quality and safety, advance energy efficiency, and create sustainable infrastructure. For more information visit Emerson.com.

51 Contact lists

Asia Pacific Headquarters India - Pune Saudi Arabia Suite No. 2503-8, 25/F, Plot No. 23, Rajiv Gandhi Infotech Park, PO Box 34332 - 3620 Building 7874 Exchange Tower, 33 Wang Chiu Road, Phase - II, Hinjewadi, Unit 1, 67th street 2nd Industrial City Kowloon Bay, Kowloon, Hong Kong Pune 411 057, Maharashtra, India Dammam, Saudi Arabia Tel: (852) 2866 3108 Tel: (9120) 4200 2000 Toll Free: 800 844 3426 Fax: (9120) 4200 2099 Fax: (852) 2520 6227 Tel: +966 3 8147560 Fax: +966 3 8147570 Indonesia Australia BSD Taman Tekno 8 356 Chisholm Road South Korea Jl. Tekno Widya Blok H10 No 2 & 3 3F, The Pinnacle Gangnam Auburn NSW 2144, Australia Tangerang Selatan 15314 343, Hakdong-ro, Gangnam-gu, Tel: (612) 9795 2800 Indonesia Seoul 06060, Republic of Korea Fax: (612) 9738 1699 Tel: (6221) 2966 6242 Fax: (6221) 2966 6245 Tel: (822) 3483 1500 China - Beijing Fax: (822) 592 7883 Beijing Sales Office Japan Room 1017 JianWei Building, Shin-yokohama Tosho Building Taiwan 66 Nan Lishi Road, XiCheng District, No. 3-9-5 Shin-Yokohama, Kohoku-ku 3F No. 122 Lane 235, Pao Chiau Rd., XinDianv Dist., Beijing, PRC Yokohama 222-0033 Japan New Taipei City 23145, Taiwan (R.O.C.) Tel: (8610) 5763 0488 Tel: (8145) 475 6371 Fax: (8145) 475 3565 Tel: (8862) 8912 1360 Fax: (8610) 5763 0499 Fax: (8862) 8912 1890 Malaysia China - Guangzhou Level M2, Blk A, Menara PKNS-PJ Thailand Guangzhou Sales Office 34th Floor, Interlink Tower, 508-509 R&F Yinglong Plaza, Jalan Yong Shook Lin 1858/133, Bangna Trad, No. 76 Huangpu Road West, 46050 Petaling Jaya, Selangor, Malaysia Bangkok 10260, Thailand Guangzhou, PRC Tel: (603) 7949 9222 Tel: (662) 716 4700 Tel: (8620) 2886 7668 Fax: (603) 7949 9333 Fax: (662) 751 4241 Fax: (8620) 2886 7622 Middle East & Africa United Arab Emirates China - Shanghai PO Box 26382 Jebel Ali Free Zone Shanghai Sales Office Jebel Ali Free Zone - South PO Box 26382 7F, Emerson Building, 1582 Gumei Dubai, UAE Dubai UAE Rd, Shanghai, PRC Tel: (9714) 811 8100 Toll Free: 800 441 3428 Tel: (8621) 3338 7333 Fax: (9714) 886 5465 Tel: +971 4 811 8100 Fax: +971 4 886 5465 India - Mumbai Philippines Delphi B-Wing, 601-602, 6th Floor Vietnam 10/F SM Cyber West Avenue, EDSA cor. Central Avenue, Hiranandani Business Park, Level 6, Melinh Point Tower, 2 Ngo Due Ke, West Avenue, Barangay Bungad, Diliman, Powai, Mumbai 400076 District 1, Ho Chi Minh City Quezon City 1105 Philippines Tel: (9122) 6786 0793 Vietnam Fax: (9122) 6662 0500 Tel: (632) 689 7200 Tel: (84) 908 009 189

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