Sinclair SDV 6 Service Manual page 129

8.1.59 J55 - Speed control mode setting error
Error display
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
126
Digital display
The faulty IDU stops. Other IDUs of the same system: operate normally.
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
to the constant air flow control mode.
Automatic recovery
 The IDU model is set incorrectly.
 The IDU main control board is damaged.
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?
Note 1: For specialized tooling and instructions, please contact your local dealer or technical
support personnel.
Panel or display box
Spot check interface
J55
No
Yes
Fault cleared
Display position
Wired controller
Error code is not
query displayed
Replace the main control
board of the IDU