Mitsubishi Electric PURY-EP200YLM-A, Service Handbook, Page: 260 / 434

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
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7-6-16 Error Code [4230] Detail Code 126
1. Error code definition
DCL temperature fault (Detail code 126)(outdoor unit)
2. Error definition and error detection method
When DCL temperature that equals or exceeds 170°C is detected (applicable to INV30YC only)
3. Cause, check method and remedy
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems](page 337)
7-6-17 Error Code [4240]
1. Error code definition
Overload protection
2. Error definition and error detection method
If the output current of "(Iac) >Imax (Arms)" or "THHS > TOL" is continuously detected for 10 minutes during inverter operation.
refer to the following page(s). [7-1 Error Code and Preliminary Error Code Lists](page 225)
3. Cause, check method and remedy
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems](page 337)
Cause Check method and remedy
(1) Fan inverter board fault Refer to the following page(s). [8-10-8 Checking the Fan Board Error Detection Cir-
cuit at No Load](page 341)
Refer to the following page(s). [8-10-9 Checking the Fan Inverter for Damage at No
Load](page 342)
Refer to the following page(s). [8-10-10 Checking the Fan Inverter for Damage with
Load](page 343)
(2) Outdoor unit fan fault Check the outdoor unit fan for proper operation.
If there is a problem with fan operation, check the fan motor. Refer to the following
page(s). [8-10-7 Checking the Fan Motor for Ground Fault and Coil Resistance
Problems](page 341)
(3) DCL temperature sen-
sor connector contact
failure
Check the connector (CNTH) on the inverter board for proper connection.
(4) DCL error If the problem persists after restart, replace the DCL.
Cause Check method and remedy
(1) Air passage blockage Check that the heat sink cooling air passage is not blocked
(2) Power supply environment Power supply voltage is 342 V or above.
(3) Inverter failure Refer to the following page(s). [8-10 Troubleshooting Inverter Problems](page
337)
(4) Compressor failure Check that the compressor has not overheated during operation.
→ Check the refrigerant circuit (oil return section).
Refer to the following page(s). [8-10-3 Checking the Compressor for Ground
Fault and Coil Resistance Problems](page 339)
(5) The model selection switches
(SW5-3 - 5-8) on the outdoor
unit are set incorrectly.
Check the setting for the model selection switch on the outdoor unit (Dipswitches
SW5-3 - 5-8 on the outdoor unit control board).
For switch settings, refer to the following page(s). [7-9-2 Error Code [7101]](page
286)