Error Code [4220] Detail Code 123; Error Code [4220] Detail Code 124 - Mitsubishi Electric PURY-P200YLM-A(1) Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-12

Error Code [4220] Detail Code 123

1. Error code definition
Voltage boost control error (Detail code 123)(outdoor unit)
2. Error definition and error detection method
When a drop in power supply voltage or a malfunction in the booster circuit is detected
3. Cause, check method and remedy
Cause
(1) Inverter-output-related
items
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems](page 337)
7-6-13

Error Code [4220] Detail Code 124

1. Error code definition
BUS circuit fault (Detail code 124)(outdoor unit)
2. Error definition and error detection method
When a malfunction of the relay (RY 2, 3, or 4) on the inverter board is detected
3. Cause, check method and remedy
Cause
(1) Contact failure
(2) Inverter-output-related
items
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems](page 337)
HWE1314A
Check method and remedy
Refer to the following page(s). [8-10-2 Checking the Inverter Board Error Detection
Circuit](page 339)
Refer to the following page(s). [8-10-3 Checking the Compressor for Ground Fault
and Coil Resistance Problems](page 339)
Refer to the following page(s). [8-10-4 Checking the Inverter for Damage at No-
Load](page 339)
Refer to the following page(s). [8-10-5 Checking the Inverter for Damage during
Compressor Operation](page 340)
Refer to the following page(s). [8-10-11 Checking the Installation Conditions](page
343)
Check method and remedy
Refer to the following page(s). [8-10-4 Checking the Inverter for Damage at No-
Load](page 339)
Refer to the following page(s). [8-10-5 Checking the Inverter for Damage during
Compressor Operation](page 340)
Refer to the following page(s). [8-10-2 Checking the Inverter Board Error Detection
Circuit](page 339)
Refer to the following page(s). [8-10-3 Checking the Compressor for Ground Fault
and Coil Resistance Problems](page 339)
Refer to the following page(s). [8-10-4 Checking the Inverter for Damage at No-
Load](page 339)
Refer to the following page(s). [8-10-5 Checking the Inverter for Damage during
Compressor Operation](page 340)
Refer to the following page(s). [8-10-11 Checking the Installation Conditions](page
343)
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