Mitsubishi Electric QAHV Série Manuel D'installation & D'instructions page 63

Error
code *1
Error type
(PCB *2
RC
M-NET)
Thermistor Discharge temp sensor (TH1)
5101
fault
Suction temp sensor (TH2)
5102
Heat exchanger
5103
outlet refrigerant temp sensor (TH3)
Air-side heat exchanger
5104
inlet refrigerant temp sensor (TH4)
Air-side heat exchanger
5105
outlet refrigerant temp sensor (TH5)
Outside temp sensor (TH9)
5109
Outlet water temp sensor (TH11)
5111
Inlet water temp sensor (TH12)
5112
Shell temp sensor (TH14)
5114
External water sensor1 (TH15)
5115
External water sensor2 (TH16)
5116
External water sensor3 (TH17)
5117
Secondary side water sensor (TH18)
5118
(when the
secondary
side
control is
enabled)
High-pressure sensor fault/high-pressure fault
5201
Low-pressure sensor fault/low-pressure fault
5202
Discharge temperature fault
1102
Heat exchanger outlet temperature fault
1105
Liquid refrigerant floodback
1502
Model setting error 1
7113
Model setting error 2
7117
Power supply frequency fault
4115
Open phase
4102
Cause
(Installation/Setting error)
Dip switches on the PCB were set
incorrectly during maintenance.
Power supply frequency is a frequency
other than 50 Hz or 60 Hz.
There is an open phase.
GB-63
Cause
(Parts problems)
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted thermistor wiring
Broken or shorted pressure sensor wiring
Broken or shorted pressure sensor wiring
• Water flow control valve fault
• Pump fault
• High-pressure sensor fault
• Discharge refrigerant thermistor fault
• Linear expansion valve fault (Main circuit
LEV, injection LEV)
• Refrigerant shortage (gas leakage)
• Water flow control valve fault
• Pump fault
• Fan motor error/broken motor wire
• Low-pressure sensor fault
• Discharge refrigerant temperature
thermistor fault
• Electronic expansion valve fault
• Resistor Z21 fault (connected to the Main
control board)
• Circuit board fault
Error reset *3
Unit
side Remote
(PCB)
Operation
SWS1
SW