McQuay Air Conditioner Error Codes

For models:

 

MDB 150/200/250

 

300/350/400/500 BR

 

E01 - Manual restart required

 

E02 - high temperature of compressor 1 (overload)

 

E03 - increased temperature of compressor 2 (overload)

 

E04 - compressor temperature 3 (overload)

 

E05 - compressor temperature 4 (overload)

 

E06 - activation of the compressor high pressure switch 1 / thermal contact activation

 

E07 - actuation of the compressor high pressure switch 2 / thermal contact activation

 

E08 - activation of the compressor high pressure switch 3 / thermal contact activation

 

E09 - activation of the compressor high pressure switch 4 / thermal contact activation

 

E10 - activation of the compressor pressure switch 1 / shortage of refrigerant / anomalous outdoor temperature

 

E11 - activation of the compressor pressure switch 2 / shortage of refrigerant / anomalous outdoor temperature

 

E12 - activation of the compressor pressure switch 3 / shortage of refrigerant / anomalous outdoor temperature

 

E13 - activation of the compressor pressure switch 4 / shortage of refrigerant / anomalous outdoor temperature

 

E14 - the room temperature sensor is shorted

 

E15 - the room temperature sensor is open

 

E16 - Evaporator temperature sensor 1 short-circuited

 

E17 - Evaporator temperature sensor 2 short-circuited

 

E18 - Evaporator temperature sensor 3 short-circuited

 

E19 - Evaporator temperature sensor 4 short-circuited

 

E20 - evaporator temperature sensor 1 open

 

E21 - evaporator temperature sensor 2 open

 

E22 - evaporator temperature sensor 3 open

 

E23 - evaporator temperature sensor 4 open

 

E24 - condenser temperature sensor 1 shorted

 

E25 - condenser temperature sensor 2 shorted

 

E26 - condenser temperature sensor 3 short-circuited

 

E27 - condenser temperature sensor 4 short-circuited

 

E28 - Condenser temperature sensor 1 open

 

E29 - Condenser temperature sensor 2 open

 

E30 - Condenser temperature sensor 3 open

 

E31 - Condenser temperature sensor 4 open

 

E32 - Compressor 1 defrost cycle activated

 

E33 - Compressor 2 defrost cycle activated

 

E34 - Compressor 3 defrost cycle activated

 

E35 - Compressor 4 defrost cycle activated

For models:

 

MCK 20-50 A / AR

 

MCM 20-50 D / DR

 

MCC 10-60 C / CR

 

E1 - the room temperature sensor is short-circuited or torn

 

E2 - the evaporator heat exchanger temperature sensor is short-circuited or interrupted

 

E3 - the condenser heat exchanger temperature sensor is short-circuited or broken

 

E4 - compressor overload

 

E5 - refrigerant leak (freon)

 

E6 - the pump (pump) is faulty