Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

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[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
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- chapter 7 BS_07_E
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7-7-10 Error Code [5301] Detail Code 115
1. Error code definition
ACCT sensor fault (Detail code 115)
2. Error definition and error detection method
When the formula "output current < 1.8 Arms" remains satisfied for 10 seconds while the inverter is in operation.
When the formula "output current < 0.2 Arms" remains satisfied for 10 seconds while the inverter is in operation. (Hydro unit)
3. Cause, check method and remedy
Hydro unit
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
Cause Check method and remedy
(1) Contact failure Check the connector (CNCT2) on the INV board for proper connection.
(2) INV output phase loss Check the output wire for proper connection.
(3) ACCT sensor failure Refer to the following page(s).
[8-10-18 Simple Check on Inverter Circuit Components]
(4) Compressor failure Refer to the following page(s).
[8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Prob-
lems]
(5) INV board failure Replace the INV board if the problem persists after the operation is resumed.
Cause Check method and remedy
(1) INV output phase loss Check the output wire for proper connection.
(2) ACCT sensor failure Refer to the following page(s).
[8-10-18 Simple Check on Inverter Circuit Components]
(3) Pump failure Refer to the following page(s).
[8-10-11 Checking the Pump Motor for Ground Fault and Coil Resistance Prob-
lems]
(4) INV board failure Replace the INV board if the problem persists after the operation is resumed.
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