6.1.51 J45 - Motor and IDU unmatched
Panel, display box, and wired controller
The faulty IDU stops. Other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
If the motor code sent by the IDU main control board is not found in the fan driver
Unit model code or horsepower code is incorrectly set.
The fan drive board is wrong or damaged.
J45
Is the fault cleared?
Replace the fan drive board (2)
Fault cleared
Yes
No
Use the dedicated tooling (1) to
set the model code and capacity
code for the main control board
of IDU according to the IDU
model or nominal capacity, and
power on the unit again
Note:
1. For specialized tooling and instructions, please contact your local dealer or technical support personnel.
2. 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.
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