Table of Contents
[8-10 Troubleshooting Inverter Problems ]
8-10-6
Checking the Converter for Damage during Compressor Operation
Items to be checked
(1)
Operate the outdoor unit.
(2)
Check the BUS voltage after the
converter circuit went into oper-
ation and the BUS voltage has
boost. *The voltage generally
boost at or above 60 rps, de-
pending on the power source
voltage.
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)
Turn off breaker.
*Turn power off without fail.
(2)
Remove fan board CNINV
and CNSNR connectors.
(3)
Turn on breaker.
(4)
Operate unit.
HWE1314A
Phenomena
1)
BUS voltage does not boost (does
not change)BUS voltage does not
boost to approximately between
650 and 750 VDC, or the following
errors are detected.
Error code : 4220
Detail code : 123
2)
An overcurrent error occurs after
converter circuit goes into opera-
tion.
Error code : 4250
Detail code : 121,122
3)
An overvoltage error occurs after
converter circuit goes into opera-
tion.
Error code : 4220
Detail code : 109,110,112
4)
No problems were found with items
1) through 3).
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)
Electrical current over load error.
Check code: 4255, 4256
Detail code: 101, 104
2)
Logic error
Check code: 4225, 4256
Detail code:111
3)
Position error on start up
Check code: 5305, 5306
Detail code: 132
- 341 -
Remedy
Replace the inverter board.
a.If the problem persists after startup, re-
place the inverter board.
b.If the problem persists after replacing
the inverter board, replace the DCL.
a.If the problem persists after startup, re-
place the inverter board.
b.If the problem persists after replacing
the inverter board, replace the DCL.
Normal
Remedy
Change fan motor.
Change fan motor.
Remedy
Change fan board.
Change fan board.
Normal
*After checking, return connector
CNINV & CNSNR.
GB
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Troubleshooting
