Error Code [4116]; Error Code [4121] - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
[HBC]
(1) Power supply environment
Find out if there was a (momentary) power failure.
Check that the power-supply voltage between L and N is 198 V or greater.
Check the power supply voltage waveform for distortion.
(2) Voltage drop
Measure the voltage across TBP and TBN on the power-supply board while the inverter is stopped. Check the following if the
voltage is below 239 V.
1) Check the wiring between FT001/FT002 (power-supply board) and ACL for proper connection.
Make sure the short-circuit pin of CN003 (power-supply board) is properly connected.
2) Turn the power back on, and if the problem persists, replace the power-supply board.
Measure the voltage across TBP and TBN on the power-supply board while the inverter is stopped. Check the following if the
voltage is 239 V or above.
1) Check the wiring between the power-supply board and the pump inverter board for proper connection.
2) Check that F001 on the pump inverter board is not blown.
3) Turn the power back on, and if the problem persists, replace the pump inverter board.
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
7-6-15 Error Code [4220, 4225, 4226] Detail Code 109
1. Error code definition
Abnormal bus voltage rise (Detail code 109)
2. Error definition and error detection method
[Outdoor unit]
If Vdc 830V is detected during inverter operation.
[HBC]
If Vdc 407V is detected during inverter operation.
3. Cause, check method and remedy
[Outdoor unit]
(1) Different voltage connection
Check the power supply voltage on the power supply terminal block (TB1).
(2) INV board failure
If the problem recurs, replace the INV board or fan board.
In the case of 4220: INV board
In the case of 4225 and 4226: Fan board
[HBC]
(1) Different voltage connection
Check the power supply voltage on the power supply terminal block (TB1).
(2) INV board failure
If the problem recurs, replace the pump INV board.
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
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- chapter 7 BS_07_M