Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 201

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-4 Error Code [4114]
1. Error code definition
Indoor unit fan motor error
2. Error definition and error detection method
When the fan motor output from the indoor unit circuit board is ON and when the rotation speed input from the fan motor cannot
be detected for 30 seconds or more
3. Cause, check method and remedy
Cause
(1) Fan motor connector contact failure
(2) Indoor unit circuit board failure
(3) Fan motor fault
7-6-5 Error Code [4115] Detail Code 101, 102
1. Error code definition
Power supply signal sync error
2. Error definition and error detection method
The frequency cannot be determined when the power is switched on.
3. Cause, check method and remedy
Cause
(1) Power supply error
(2) Coil problem
(3) Faulty wiring
(4) Wiring failure
Between TB01 and PS board CNAC
(5) PS board failure
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Check method and remedy
Check the fan motor connector CNMF for proper connection.
Remove the fan motor connector CNMF and check the voltage at the
indoor unit circuit board.
Testing point 1. 280 VDC (Between CNMF1 (+) and CNMF4 (-))
2. 15 VDC (Between CNMF5 (+) and CNMF4 (-))
Replace the indoor unit circuit board if the voltage is abnormal.
If the 4114 error persists after the indoor unit circuit board is replaced,
replace the fan motor as well.
Replace the fan motor if the voltage is normal in step (2) above.
If the 4114 error persists after the fan motor is replaced, replace the in-
door unit circuit board as well.
Check method and remedy
Check for an occurrence of a(n) (instantaneous) power failure at the
time of error detection.
Check that the power-supply voltage is 198 V or above (TB01).
Check to see if the power-supply frequency is in the range between 45
and 54 Hz (55 and 64 Hz) (TB01).
Check the power supply voltage waveform for distortion.
Check for coil burnout.
(L101 and L102 mounted on the PS board)
Check fuse F111, F121 (PS board)
Confirm that the voltage at the PS board connector CNAC (2-4 pin) is
198 V or above.
If none of the items described above is applicable, and if the trouble re-
appears even after the power is switched on again, replace the PS
board.
BS_07_M