Sinclair SDV 6 Service Manual page 127

8.1.57 J5E - Motor startup failure
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
Motor startup failure
Error recovery Automatic recovery



Possible cause



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.
124
Digital display
Motor winding
short-circuits or cuts off
The fan is blocked by foreign material or the motor is damaged and cannot rotate.
The unit's model code or capacity code are set incorrectly
Fan blade is not installed
The fan drive module is damaged.
The IDU main control board is damaged.
Cause 1: Measure the inter-turn
winding resistance between the red,
white, and black wires of the motor
power cable. If there is a short circuit or
an open circuit, the motor is damaged
Cause 2: The fan is blocked by foreign
matters and cannot rotate
J5E
Cause 3: The unit's model code or
capacity code are set incorrectly
Cause 4: The fan blades are not
Cause 5: The fan drive board is
Cause 6: If the error cannot be
cleared after all other causes have
been eliminated, the main control
board of the IDU is damaged
Panel or display box
Spot check interface
installed
damaged
Display position
Wired controller
Error code is not
query
Replace the motor
Remove foreign
matter.
Reset the code
Install the fan blade
Replace the fan drive
board (1)
Replace the main
control board of the
IDU
displayed