Error Contents; Error Signals - Friedrich MW18C3F Service Manual

E RR O R CON TEN T S
Model : MW18C3F
Error
Serial signal error
Indoor unit thermistor error
Outdoor unit thermistor error
Indoor unit control error
Outdoor unit control error
Indoor fan motor error
Refrigerant cycle error
Optional function error
Model information error
2006.04.07
Display
Error
Operation
Timer LED
LED
2 flash Serial signal (reverse) error, at operation start up
3 flash Serial signal (reverse) error, during oeration
Normal
4 flash Serial signal (forward) error, at operation start up
5 flash Serial signal (forward) error, during operation
2 flash Indoor temperature thermistor open / short
2 flash
3 flash Heat exchanger middle thermistor open / short
2 flash Discharge thermistor open / short
3 flash 3 flash Heat exchanger thermistor open
4 flash Outdoor temperature thermistor open / short
2 flash Forced automatic SW welded
3 flash Main relay welded
4 flash 4 flash Power interruption error
7 flash VDD permanent stop protection
8 flash reverse VDD permanent stop protection
2 flash Current trip error
3 flash CT abnormal
5 flash
5 flash Compressor location detection error
6 flash Outdoor unit fan drive system abnormal
2 flash Abnormal lock
6 flash
3 flash Abnormal rotation
2 flash Discharge Temperature abnormal
7 flash
3 flash Cooling high pressure abnormal rise
8 flash 4 flash PFC circuit error
0.1 sec on/off 0.1 sec on/off Model information error
10