Midea V8 VRF Series

V8 VRF Indoor Units
102
Midea
V8
Series VRF Indoor Units
6.1.54 J52 - Motor blocking protection
Error display
Digital display
Display position
Panel or display box
Wired controller
Spot check interface
query
Error code is not
displayed
Error impact
The faulty IDU stops. Other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
Error trigger
The motor is blocked.
Error recovery
Automatic recovery
Possible cause
 The motor shaft gets stuck.
 The fan drive board is damaged.
 The IDU main control board is damaged.
Troubleshooting
J52
Cause 1: The motor shaft is clogged by
foreign material
Replace the motor
Cause 2: The fan drive board is
damaged
Replace the fan drive
board (1)
Cause 3: If the error cannot be cleared
after causes 1/2/3 have been
eliminated, the main control board of
IDU is damaged
Replace the main
control board of the
IDU
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.