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[8-9 Troubleshooting Inverter Problems ]
8-9-6
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.
8-9-7
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
RYFAN1. (On a model with
two fan motors, RYFAN1 cor-
responds to the right fan and
RYFAN2 corresponds to the
left fan (when seen from the
front).)
(3)
Turn on the breaker.
(4)
Operate the unit.
36
- 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, 5306: Detail code 135) is
detected during operation.
2)
Current sensor fault
Error code: 5305, 5306
Detail code: 135
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.
BS_08_M
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Troubleshooting
