Lennox MMD***S6-1P Error Codes
Air handler
- 101 Indoor unit communication error
- 108 Duplicated address setting error
- 109 No response error address from indoor unit
- 116 Error indicating a short-circuit, open-circuit or fault signal in the refrigerant leak…
- 118 Indoor fan PCB over heat error
- 121 Indoor temperature sensor (open/short error)
- 122 Indoor unit Eva In sensor (Open/Short)
- 123 Indoor unit Eva Out sensor (Open/Short)
- 154 Error of Fan motor in the indoor unit
- 162 EEPROM error (Hardware)
- 163 EEPROM option error
- 198 Error on thermal fuse of indoor unit (Open)
- 202 Indoor/outdoor communication error (1 min)
- 203 Communication error between indoor/outdoor INV↔MAIN MICOM (1 min)
- 221 Outdoor temperature sensor error
- 231 COND temperature sensor error
- 251 [Inverter] Emission temperature sensor error
- 403 Detection of Indoor Freezing (when Comp. Stops)
- 404 Protection of Outdoor Overload (when Comp. Stops)
- 416 Emission temperature excessively high
- 422 High pressure blockage error (Refrigerant completely Leakage error)
- 440 Heating operation blocked
- 441 Cooling operation blocked
- 458 Outdoor fan 1 error
- 461 [Inverter] Compressor startup error
- 462 [Inverter] Total current error/PFC over current error
- 463 OLP Overheat and Comp. Stop
- 464 [Inverter] IPM over current error
- 465 Compressor V limit error
- 466 DC LINK over/low voltage error
- 467 [Inverter] Compressor rotation error
- 468 [Inverter] Current sensor error
- 469 [Inverter] DC LINK voltage sensor error
- 470 EEPROM Read/Write error
- 471 [Inverter] OTP error
- 472 AC ZERO CROSSING SIGNAL OUT error
- 473 Compressor LOCK error
- 475 Outdoor fan 2 error
- 500 IPM Overheat Error for Outdoor Unit Inverter Comp.
- 554 Gas leak error
- 556 Capacities not matched
- 557 Option code miss matching among the indoors (only for DPM)
- 601 Communication error between the indoor unit and wired remote controller
- 602 Communication error between the main and sub wired remote controllers
- 604 Error of communication down between the indoor unit and wired remote controller after…
- 606 COM1/COM2 Cross-installed error
- 607 Error of Main wired remote controller and Sub wired remote controller setting
- 665 Emergency alarm system on (Emergency Stop)
- 696 Error indicating a primary refrigerant leak detected
- 697 Error indicating a secondary refrigerant leak detected
- 698 Error indicating a malfunction of the refrigerant leak sensor
- 699 R-32 detection sensor replacement alarm
- 700 R-32 detection sensor unavailable alarm
- 797 Error indicating another indoor unit that shares the outdoor unit detects the R-32…
- E101 No communication for 2 minutes between indoor units (Communication error for more than 2…
- E102 The indoor unit receiving the communication error from the outdoor unit
- E116 Error indicating a shor/open or fault signal in the refrigerant leak sensor
- E121 Error on indoor temperature sensor (Short or Open)
- E122 Error on Eva-in sensor (Short or Open)
- E123 Error on Eva-out sensor (Short or Open)
- E126 Discharge sensor error (Short or Open)
- E153 Detection of the float switch
- E154 Error of Fan motor in the indoor unit
- E162 Error of EEPROM
- E163 Error of Option setting
- E201 When sending the communication error from the outdoor unit, the mismatching of the…
- E202 Outdoor unit tracking 3 minutes error
- E665 Emergency alarm system on (Emergency Stop)
- E696 Error indicating a primary refrigerant leak detected
- E697 Error indicating a secondary refrigerant leak detected
- E698 Error indicating a malfunction of the refrigerant leak sensor
- E699 R-32 detection sensor replacement alarm
- E700 R-32 detection sensor unavailable alarm
- E797 Error indicating another indoor unit that shares the outdoor unit detects the R-32…
- Error of Outdoor Error of Outdoor
Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.