Fujitsu AUXB04GALH Service Manual page 127

Trouble shooting 49
OUTDOOR UNIT Error Method:
Current Sensor Error
Detective Actuators:
Judgment from value sensed by current
sensor
Forecast of Cause :
1. Filter PCB to Inverter PCB current sensor wiring connector disconnection, open
2. Power supply to Filter PCB to Inverter PC wiring disconnection, open
3. Filter PCB defective (Power supply section, current sensor section)
4. Inverter PCB defective
Check Point 1 : Filter PCB to Inverter PCB
Connector and wiring connection state check
Cable open check
OK
Check Point 2 : Check the wiring (Power supply to Filter PCB to Inverter PCB)
Connector connection state check
Cable open check
OK
Check Filter PCB and INV PCB
Refer to the "service parts information 3,4"
Indicate or Display:
E. 84.1
Outdoor Unit : E. 84. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 84
Detective details:
"Protection stop by "inverter speed
for 1 min"" was generated 2 times
Sensor value while inverter stopped = maximum was detected
04-57
Filter LED Continuous Flash.
20rps and sensor value 0.5A continued