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Error Codes [4220, 4225] Detail Code 111 (Ykmu); Error Codes [4220, 4225] Detail Code 131 - Mitsubishi Electric PURY-HP72 Service Handbook

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[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-15

Error Codes [4220, 4225] Detail Code 111 (YKMU)

1. Error code definition
Logic error (Detail code 111)
2. Error definition and error detection method
H/W error
If only the H/W error logic circuit operates, and no identifiable error is detected.
3. Cause, Check method and remedy
In the case of 4220
Cause
(1)
External noise
(2)
INV board failure
In the case of 4225
Cause
(1)
External noise
(2)
Fan board failure
For inverter-related error codes, refer to the following page(s). [8-11 Troubleshooting Inverter Problems (YKMU)](page 298)
7-6-16

Error Codes [4220, 4225] Detail Code 131

1. Error code definition
Low bus voltage at startup (Detail code 131)
2. Error definition and error detection method
When Vdc
160 V is detected just before the inverter operation.
3. Cause, check method and remedy
(1) Inverter main circuit failure
Same as detail code 108 of 4220 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)
HWE13080
Check method and remedy
Refer to the following page(s). [8-11-2 Checking the Inverter Board Error Detec-
tion Circuit](page 300)
Check method and remedy
Refer to the following page(s).
[8-11-7 Checking the Fan Board Error Detection Circuit at No Load](page 301)
[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)
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