[8-10 Troubleshooting Inverter Problems ]
8-10-7
Checking the Fan Motor for Ground Fault and Coil Resistance Problems
Items to be checked
Remove fan motor winding. Check
insulation resistance and coil resis-
tance.
8-10-8
Checking the Fan Board Error Detection Circuit at No Load
Items to be checked
(1)
Stop the unit.
Turn off the breaker.
*Be sure to turn off the power.
(2)
Disconnect the output wiring
to the fan motor.
Disconnect connector RY-
FAN1.
(3)
Turn on the breaker.
(4)
Operate the unit.
8-10-9
Checking the Fan Board for Damage at No Load
Items to be checked
(1)
Stop the unit.
Turn off the breaker.
*Be sure to turn off the power.
(2)
To allow for the disconnection
of output wiring from the fan
motor, disconnect connector
RYFAN1.
(3)
Set SW7-2 on the control
board to ON.
(4)
Turn on the breaker.
(5)
Operate the unit
46
- chapter 8
Phenomena
1)
Fan motor insulation failure.
If < 1 MΩ, Defect.
2)
Fan motor wire failure.
Target coil resistance: Approx. 10 Ω.
(Changes with temperature)
Phenomena
1)
An error other than current sensor er-
ror (5305: Detail code 135) is detect-
ed during operation.
2)
Current sensor fault
Error code: 5305
Detail code: 135
Phenomena
1)
An error other than the current sen-
sor error (5305 Detail code 135) is
detected within 30 seconds from the
startup of operation.
2)
Inter-wire voltage imbalance of 5 V or
above
3)
No inter-wire voltage imbalance ex-
ists. A current sensor error (Detail
code 135) is detected 30 seconds af-
ter the startup of operation, and the
operation stops.
Remedy
Change fan motor.
Change fan motor.
Remedy
Replace the fan board.
Normal
*When done checking, reconnect all
connectors as they were. Unless
they are properly reconnected, cur-
rent sensor fault will not be resolved.
Remedy
Replace the fan board.
Replace the fan board.
Normal
*When done checking, reconnect all
connectors as they were. Unless
they are properly reconnected, cur-
rent sensor fault will not be resolved.
BS_08_L
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