Mitsubishi Electric PUHY-HP72 Service Handbook page 165

[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-7-11 Error Codes [5305, 5306] Detail Code 135
1. Error code definition
Current sensor fault (Detail code 135)
2. Error definition and error detection method
Detection of output current below 0.2 Arms for 10 continuous seconds while fan motor is in operation
3. Cause, check method and remedy
Cause
(1) Open output phase of fan board
(2) Fan motor error
(3) Fan board failure
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems]
7-7-12 Error Codes [5305, 5306] Detail Code 136
1. Error code definition
Current sensor/circuit fault (Detail code 136)
2. Error definition and error detection method
Detection of abnormal value by the current detection circuit before the startup of fan motor
3. Cause, check method and remedy
Cause
(1) Fan board fault
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems]
7-7-13 Error Code [5701]
1. Error code definition
Loose float switch connector
2. Error definition and error detection method
Detection of the disconnected float switch (open-phase condition) during operation
3. Cause, check method and remedy
(1) CN4F disconnection or contact failure
Check for disconnection of the connector (CN4F) on the indoor unit control board.
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Check method and remedy
Check the output wiring from the fan board for proper con-
nection.
Refer to the following page(s).
[8-9-7 Checking the Fan Motor for Ground Fault and Coil Re-
sistance Problems]
Refer to the following page(s).
[8-9-8 Checking the Fan Board Error Detection Circuit at No
Load]
[8-9-9 Checking the Fan Board for Damage at No Load]
[8-9-10 Checking the Fan Board for Damage with Load]
Check method and remedy
Refer to the following page(s).
[8-9-8 Checking the Fan Board Error Detection Circuit at No
Load]
[8-9-9 Checking the Fan Board for Damage at No Load]
[8-9-10 Checking the Fan Board for Damage with Load]
HWE18240_GB