M1−8 (VERSION 6.0x) INTEGRATED MODULAR CONTROL ERROR CODES To Recall Stored Errors: Set Recall and push button to recall stored errors. First error displayed is most recent. To Erase Stored Errors: Hold down pushbutton until a zero (0) is displayed. Error Problem Error Problem Error Problem NOTE: SCROLLING DISPLAY (6.0...) INDICATES NORMAL OPERATION; NO ERRORS DETECTED. 53 Gas Unit: S21 (Secondary Heat Limit 1) opened N times during a demand. N is defined by ECTO 3.04. 103 General configuration error. Reference IMC manual. Other Units: Jumper is open. A55 P111 pin 4 & 5. 1 Power loss for two cycles. May indicate unit power is low quality. 104 Reserved. 2 ECTO access error. May indicate problem with ECTO chip. Factory ECTO defaults used. 54 Gas Unit: S47 (Roll Out Switch 1) is open. Other Units: S15 (El. Heat Limit) is open. 105 configuration error. ECTO 6.26 does not agree with A56 DIP settings, or ECTO 6.26 is out of range for 3 Reserved. 55 Gas Unit: S47 (Roll Out Switch 1) opened N times during a demand. N is defined by ECTO 3.08. mode selected. No . Other Units: S15 (El. Heat Limit) opened N times during a demand. N is defined by ECTO 1.04 or 2.04. 4 A17 input indicates smoke alarm. Action defined by ECTO 5.01. Default is unit OFF. 106 A34 (Return Air Pressure sensor) error. No exhaust operation. Reference IMC manual. 56 Gas Unit: S18 (Combustion Air Proof Switch 1) is open. Other Units: S63 (El. Heat Limit) is open. 5 S52 (Air Flow Switch) Indicates no blower air 16 seconds after blower demand. 107 A30 (Discharge Air Pressure sensor) error. Unit off. Reference IMC manual. 57 Gas Unit: S18 (Combustion Air Proof Switch 1) opened N times during a demand. N is defined by ECTO 3.07. 6 S27 (Dirty Filter Switch) Indicates dirty filter. Other Units: S63 (El. Heat Limit) opened N times during a demand. N is defined by ECTO 2.04. 108 Plenum pressure exceeds ECTO 0.21 for more than 20 sec. Unit off. Reset required. 7 External EEPROM write error. 58 GV1 (Gas valve 1) not energized two minutes after demand. 109 Error 107 or 108 occurred ECTO 0.22 times since last IMC reset. Unit off. 8−9 Reserved. 59 GV1 (Gas valve 1) not energized two minutes after demand, N times. N is defined by ECTO 3.09. 110 Waiting for network sensor data. ECTO 5.27. Information only. 10 24 VAC power loss at TB35−1 on A55 (M1) board. P111 pin 11. 60 S99 (Primary Heat Limit 2) is open. 111 Internal EEPROM CRC error. 11 24 VAC power loss at TB34−1 on A55 (M1) board. P113 pin 1. 61 S99 (Primary Heat Limit 2) opened N times during a demand. N is defined by ECTO 3.04. 112 Internal EEPROM erase error. 12 S4 (High Press. 1) is open. Note: On 088S units, S4 or S5 (compr. discharge temp.) is open. 62 S100 (Secondary Heat Limit 2) is open. 113 Internal EEPROM write error. 13 S4 (High Press. 1) opened N times during a demand. N is defined by ECTO 1.12 or 4.14. Reset to restore compr. 1. 63 S100 (Secondary Heat Limit 2) opened N times during a demand. N is defined by ECTO 3.04. 14 S7 (High Press. 2) is open. 114 Internal PPL Clock error. 64 S69 (Roll Out Switch 2) is open. 15 S7 (High Press. 2) opened N times during a demand. N is defined by ECTO 1.12 or 4.14. Reset to restore compr. 2. 115 UNIT TEST switch left in test mode. 65 S69 (Roll Out Switch 2) opened N times during a demand. N is defined by ECTO 3.08. 16 S28 (High Press. 3) is open. 116 UNIT TEST switch left in test mode at reset. 66 S45 (Combustion Air Proof Switch 2) is open. 17 S28 (High Press. 3) opened N times during a demand. N is defined by ECTO 1.12 or 4.14. Reset to restore compr. 117 Hibernation mode. To insure correct voltage phasing before startup, use pressure gauges to check 3. 67 S45 (Combustion Air Proof Switch) opened N times during a demand. N is defined by ECTO 3.07. proper operation and arrow label for blower rotation. Compressor damage will be the responsibility of the installer. To wake the unit, slide bottom two (OPT2,SHIFT) MODE to the right and back. 18 S96 (High Press. 4) is open. 68 GV2 (Gas valve 2) not energized two minutes after demand. 69 GV2 (Gas valve 2) not energized two minutes after demand, N times. N is defined by ECTO 3.09. 118− 19 S96 (High Press. 4) opened N times during a demand. N is defined by ECTO 1.12 or 4.14. Reset to restore compr. Reserved. 126 4. 70−72 Reserved. 20 A42, S42, or S149 is open between TB1−6 & TB1−23. A42 is phase monitor; S42 is blower overload or inverter fault 73 Remote sensor network data not sent within 5 minutes. Clears when data is received or on IMC reset. 127 Error buffer overflow. This means multiple errors occurred and some have not been stored. output; S149 is condensate overflow switch. 128− 74 A2 (Zone sensor) problem. Check sensor and wiring. Reserved. 21 A42, S42, or S149 opened N times during a demand. N is defined by ECTO 5.08. 255 75 RT17 (Outdoor Temperature) sensor problem. Check sensor and wiring. 22 S87 (Low Press. 1) is open. 76 A91 (Relative sensor) problem. Check sensor and wiring. IMPORTANT − Check DIP switches BEFORE applying power to unit. See IMC manual 23 S87 (Low Press. 1) opened N times during a demand. N is defined by ECTO 1.13 or 4.15. Reset to restore compr. for A56 (EM1) economizer DIP settings. The IMC checks switch position on power−up 1. 77 RT6 (Discharge/Supply Air Temp Sensor) problem. No FAT (heating or cooling). In Discharge Air Control mode, operation is limited to one compressor in cooling or one heat stage in heating. and after a reset. 24 S88 (Low Press. 2) is open. 78 RT16 (Return Air Temperature Sensor) problem. No free cooling if economizer is in TMP (temperature) mode, 25 S88 (Low Press. 2) opened N times during a demand. N is defined by ECTO 1.13 or 4.15. Reset to restore compr. dampers will close. UNIT DIP SWITCH SETTINGS (A55) 2. 79 A major communication problem between the main board and add−on boards has occurred or multiple A133 (GP1) GAS/ELEC.OFF" ELEC/ELECON" HEAT PUMP 26 S98 (Low Press. 3) is open. boards are set to same mode. Main control has locked out all add−on boards. Reset control to restore POSITION POSITION 27 S98 (Low Press. 3) opened N times during a demand. N is defined by ECTO 1.13 or 4.15. Reset to restore compr. 80 A communication problem between the main board and add−on board has occurred or multiple A133 (GP1) boards 3. are set to same mode. 28 S97 (Low Press. 4) is open. 81 IMC configuration error. UNIT DIP switch setting does not match ECTO 4.24 setting. 29 S97 (Low Press. 4) opened N times during a demand. N is defined by ECTO 1.13 or 4.15. Reset to restore compr. 4. 82 Main board reset or power outage has occurred. 83 IMC configuration error. The add−on board types do not agree with the UNIT DIP switch settings. 30−31 Reserved. 84 An add−on board did not respond when polled by main control during system power−up. Problem add−on board will 1 PHASE 3 PHASE 1 PHASE 3 PHASE 1 PHASE 3 PHASE 32 S49 (Freeze stat 1) is open. have flickering heartbeat. UNITS UNITS UNITS UNITS UNITS UNITS 33 S49 (Freeze stat 1) opened N times during a demand. N is defined by ECTO 4.04. Reset to restore compr. 1. 85 Humiditrol reheat unit needs RH1 board, ECTO 4.24 is not set to 3, 5, 6, 7, or ECTO 4.25 is not set to 101. Non−re- OPT switch is not currently used. 34 S50 (Freeze stat 2) is open. heat unit ECTO 4.24 is not set to 0. 35 S50 (Freeze stat 2) opened N times during a demand. N is defined by ECTO 4.04. Reset to restore compr. 1. 86 input conflict. Simultaneous heat and cool demands. Check thermostat wiring. A61 (HP1) DIP SWITCH SETTINGS A59 (C2) DIP SWITCH SETTINGS FAN FAN SW1 36 S53 (Freeze stat 3 ) is open. 87 UNIT DIP switch has changed while unit is energized. Check UNIT DIP switch setting and reset control. 090 & 120 156, 180 units 24 64 88 Possible problem with the ECTO chip. Control will operate on factory default ECTO settings. units have have 4 fans & 37 S53 (Freeze stat 3) opened N times during a demand. N is defined by ECTO 4.04. Reset to restore compr. 1. 34 89 No address is set on unit address DIP switch SW3. 2 fans 3 38 S95 (Freeze stat 4) is open. SW1 COMP 39 S95 (Freeze stat 4) opened N times during a demand. N is defined by ECTO 4.04. Reset to restore compr. 1. 90 RAM error forces reset. LC/LG 210, 240, FAN SW1 40 RT16 (Return air temp) exceeded heating limit set in ECTO 5.06. No heating. 91 Outdoor sensor (A7) problem. 180 & 240 FAN 300S units which 92 Indoor enthalpy sensor (A52) problem. 24 64 41 RT16 (Return air temp) exceeded cooling limit set in ECTO 5.07. No cooling. units have contain 34 93 System mode was changed due to error in controlling sensor or due to loss of communication. Backup mode de- 4 fans. 4 condenser fans 42−43 Reserved. fined by ECTO 6.01. SW1 & 4 compressors. COMP 44 Gas valve 1 is energized but no demand. (GV1). Check gas control and wiring. 94 A2 (Zone sensor) setpoint out−of−range. IMC uses defaults of 65F/18C heat and 80F/27C cool. Switch #2 is not used. SC/SG 240H, 288H, 45 Gas valve 2 is energized but no demand. (GV3). Check gas control and wiring. 95 ECTO parameter has been changed by the pushbutton. Information only. 420, 480, 540, & 600, FAN SW1 46 No 24VAC relay power on A60 (E1) board, K9−5 input. 96 A138 (Four stage thermostat interface board) failure. Verify proper ECTO 6.01 setting. No heating or cooling. PUSHBUTTON LC/LG 248, 300H, 64 47 No 24VAC relay power on A58 (G1) board, TB35−1 input. 97 A138 (Four stage thermostat interface board) detected but ECTO 6.01 is not set to option 12 or equipment type is Single Push − By−pass Time Delays 360 units which set to heat pump. No heating or cooling. contain 6 condenser 34 48 No 24VAC relay power on A61 (HP1) board, TB34−1 input. Double Push − Reset Lockout Conditions 98 ECTO memory chip write error. fans, 6 condenser COMP 49 No 24VAC relay power on A59 (C2) board, TB35−1 input. Long Push − Reset Control 99 A24 (Outdoor Air Control) is open. closed to minimum position. Cleared by IMC reset. fan relays, and 50 Gas Unit S10 (Primary Heat Limit 1) is open. Other Units: Jumper is open A55 P111 pin 1 & 2. 4 compressors. 100 VAV/CAVB or exhaust fan configuration error. Affected features do not operate. Reference IMC manual. 51 Gas Unit: S10 (Primary Heat Limit 1) opened N times during a demand. N is defined by ECTO 3.04. Other Units: Jumper is open. A55 P111 pin 1 & 2. 101 MGV configuration error. Affected features (e.g. modulating heat) do not operate. Reference IMC manual. 08/08 401290S 52 Gas Unit: S21 (Secondary Heat Limit 1) is open. Other Units: Jumper is open. A55 P111 pin 4 & 5. 102 GP configuration error. Affected features do not operate. Reference IMC manual. *2P0808* *P401290S*