Fujitsu AUXG45LRLB Service Instruction page 64

Trouble shooting 24
OUTDOOR UNIT E rror Method:
Heat Sink Thermistor Error
Detective Actuators:
Outdoor unit Main PCB
Forecast of C ause :
1. Main PCB failure
Indicate or Display:
Error code : 77
Detective details:
Heat sink temperature thermistor (Built-in IPM) open/short detected
If this error is displayed, replace Main PCB
Outdoor unit : Model 45.54
PUMP
POWER
DOWN
ERROR
MODE L (
2
Attention!!
This unit does not have a heat sink themistor
In this case, replace
02-26
LOW PEAK
NOISE CUT
) 1 L ( ) 2 (L3) (L4) (L5) L ( ) 6
7
7
Main PCB