J52 Motor Blocking Protection - Midea V8 VRF Series Service Manual

V8 VRF Indoor Units
6.1.54 J52 - Motor blocking protection
Error display
The faulty IDU stops. Other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
Error trigger
The motor is blocked.
Error recovery
Automatic recovery
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Possible cause
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Troubleshooting
Note 1: Please observe the following rule when replacing the fan drive board: For units whose fan
drive board is welded onto the main control board, if either the fan drive board or main control
board becomes faulty, the whole control board has to be replaced.
102
Digital display
The motor shaft gets stuck.
The fan drive board is damaged.
The IDU main control board is damaged.
Cause 1: The motor shaft is clogged by
J52
Cause 3: If the error cannot be cleared
eliminated, the main control board of
Panel or display box
Spot check interface
query
foreign material
Cause 2: The fan drive board is
damaged
after causes 1/2/3 have been
IDU is damaged
Display position
Wired controller
Error code is not
displayed
Replace the motor
Replace the fan drive
board (1)
Replace the main
control board of the
IDU