Friedrich MR18Y3H - Manual (Page 18)

E R R O R D E T E C T I O N
Error Operation
LED
Timer LED
Serial signal error Normal
2 flash
3 flash
4 flash
5 flash
Serial signal (reverse) error, at operation start up
Serial signal (reverse) error, during oeration
Serial signal (forward) error, at operation start up
Serial signal (forward) error, during operation
Indoor unit thermistor error 2 flash
8 flash
2 flash
Outdoor unit thermistor error 3 flash
3 flash
2 flash
3 flash
4 flash
8 flash
Indoor unit control error 4 flash
2 flash
3 flash
7 flash
4 flash
8 flash
Display
Error
Outdoor unit control error 5 flash
2 flash
3 flash
5 flash
Indoor fan motor error 6 flash
2 flash
3 flash
Abnormal lock
Abnormal rotation
CT abnormal
Outdoor unit fan drive system abnormal
2 flash
2 flash
Refrigerant cycle error 7 flash 3 flash
5 flash
Optional function error
Model information error
8 flash 3 flash
0.1 sec on/off 0.1 sec on/off
4 flash
6 flash
Current trip error
Main relay welded
Wired remote controller error
Compressor temperature thermistor open / short
Outdoor temperature thermistor open / short
Indoor temperature thermistor open / short
Heat exchanger thermistor open
Heat exchanger middle thermistor open / short
Discharge thermistor open / short
VDD permanent stop protection
reverse VDD permanent stop protection
Forced automatic SW welded
Power interruption error
Compressor location detection error
Model information error
Discharge Temperature abnormal
Cooling high pressure abnormal rise
Pressure switch trouble
Active filter voltage trouble (first time)
Active filter voltage trouble (second time)
PFC circuit error
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