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6.1.55 J55 - Speed control mode setting error
Error display
The faulty IDU stops. Other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
The IDU is non constant air flow control, but its main control program sets the fan speed according
Error trigger
to the constant air flow control mode.
Error recovery
Automatic recovery
Possible cause
Troubleshooting
Note 1: For specialized tooling and instructions, please contact your local dealer or technical
support personnel.
Digital display
The IDU model is set incorrectly.
The IDU main control board is damaged.
J55
Use the dedicated tooling (1)
to set the model code for the
main control board of IDU,
and power on the unit again
Is the fault cleared?
Yes
Fault cleared
V8 VRF Indoor Units
Display position
Panel or display box
Spot check interface
query
No
Replace the main control
board of the IDU
Wired controller
Error code is not
displayed
103
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