Current Sensor Error - Fujitsu Airstage J-II Service Manual

Trouble shooting 30
OUTDOOR UNIT Error Method:

Current Sensor Error

Detective Actuators:
Judgment from value sensed by current
sensor 1 (current sensor for inverter)
* Current sensor 1 is mounted on
Filter PCB (INV)
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
Indicate or Display:
Outdoor Unit : E. 84. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous 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
wiring connection state
current sensor
04-40
20rps and sensor value 0A continued