Self Diagnosis Function - Mitsubishi Heavy Industries SRF25ZIX-S Anwenderhandbuch

Self diagnosis function

■
We are constantly trying to do better service to our customers by installing such judges that show abnormality of each function as follows:
TIMER light ON
RUN light keeps flashing
RUN light ON
RUN light 2 time flash
RUN light 5 time flash
Downloaded from www.Manualslib.com
RUN light
1 time flash
2 time flash
3 time flash
6 time flash
7 time flash
TIMER light
1 time flash
2 time flash
4 time flash
5 time flash
1 time flash
2 time flash
3 time flash
4 time flash
5 time flash
6 time flash
7 time flash
Keep flashing
2 time flash
ON
manuals search engine
Description of trouble
• Broken heat exchanger sensor 1 wire, poor connector connection
Heat exchanger sensor 1 error
Room temperature sensor error • Broken room temperature sensor wire, poor connector connection
Heat exchanger sensor 3 error • Broken heat exchanger sensor 3 wire, poor connector connection
Indoor fan motor error • Defective fan motor, poor connector connection
• Refrigerant is insufficient, leaking
Refrigerant is insufficient
• Closed serice valve
Closed service valve
• Broken heat exchanger sensor 1 wire, poor connector connection
Heat exchanger sensor 1 error
Outdoor temperature sensor error • Broken outdoor sensor wire, poor connector connection
Outdoor heat exchanger fluid pipe sen- • Broken heat exchanger fluid pipe sensor wire, poor connector
sor error connection
Discharge pipe sensor error
• Broken discharge pipe sensor wire, poor connector connection.
Suction pipe sensor error • Broken suction pipe sensor wire, poor connector connection.
• Compressor locking, open phase on compressor output,
Current cut shortcircuit on power transistor, closed service valve
• Broken power transistor, broken compressor wire
Trouble of outdoor unit • Broken discharge pipe sensor wire, poor connector connection
• Compressor blockage
Over current • Overload operation, overcharge
• Broken power transistor
Power transistor error
• Gas shortage, defective discharge pipe sensor, closed service
Over heat of compressor
valve
• Defective power supply, Broken signal wire, defective in/outdoor
Error of signal transmission
unit boards
Outdoor fan motor error • Defective fan motor, poor connector connection
Cooling high pressure protection • Gas over charge, short circuit of outdoor unit
• Defective compressor
Rotor lock • Open phase on compressor
• Defective outdoor unit boards
Active filter voltage error • Defective power supply
– 23 –
Cause