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Error Codes [5305] Detail Code 134; Error Code [5401] - Mitsubishi Electric PURY-HP72 Service Handbook

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[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-7-19

Error Codes [5305] Detail Code 134

1. Error code definition
RPM error before start up (Detail code 134)
2. Error definition and error detection method
The fan RPM will not drop to the set RPM.
3. Cause, check method and remedy
Cause
(1)
Outdoor factors
(2)
Fan board failure
(3)
Fan motor error
For inverter-related error codes, refer to the following page(s).
[8-10 Troubleshooting Inverter Problems (TKMU)](page 288)
[8-11 Troubleshooting Inverter Problems (YKMU)](page 298)
7-7-20

Error Code [5401]

1. Error Code
5401
Humidity sensor fault
2. Error definition and error detection method
A short-circuit or an open-circuit of the humidity sensor is detected during operation.
3. Cause, check method and remedy
(1)
Connector contact failure (CN30) (Loose con-
nector)
(2)
Broken or partially broken humidity sensor wire
(3)
Humidity sensor fault
(4)
Indoor unit control board (detection circuit) fault
HWE13080
Check that there is no wind (gust or strong wind).
Refer to the following page(s).
(TKMU)
[8-10-8 Checking the Fan Inverter for Damage at No Load](page 292)
[8-10-9 Checking the Fan Inverter for Damage with Load](page 293)
(YKMU)
[8-11-8 Checking the Fan Inverter for Damage at No Load](page 302)
[8-11-9 Checking the Fan Inverter for Damage with Load](page 303)
Refer to the following page(s).
(TKMU)
[8-10-6 Checking the Fan Motor for Ground Fault and Coil Resistance Problems](page
291)
(YKMU)
[8-11-6 Checking the Fan Motor for Ground Fault and Coil Resistance Problems](page
301)
Cause
Check method and remedy
Check method and remedy
1)
Check the connector for proper contact.
Reconnect the connector, and operate the unit to check for
proper operation.
2)
Check for broken humidity sensor wire.
3)
Check the output voltage across No. 1 and No. 3 pins of
connector CN30 with the connector being connected to the
indoor unit control board.
30% : 1.25V
40% : 1.52V
50% : 1.88V
60% : 2.19V
70% : 2.48V
80% : 2.79V
4)
If the above items check out okay, replace the indoor unit
control board.
- 221 -
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