Sinclair SDV 6 Service Manual page 66

8.1.5 A72 - The error of the linked humidifying IDU is transmitted to the master IDU
Error display
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
Digital display
Master IDU: operates normally. Humidifying IDUs: stop. Other IDUs of the same system: operate
normally.
ODU of the same system: operate normally.
The error of the linked humidifying IDU is transmitted to the master IDU
Automatic recovery
 The humidifying IDU is faulty.
The master IDU's main control board is damaged.

Obtain the linked error code
(1) of the humidifying IDU,
and refer to the
corresponding error handling
method in the maintenance
manual of the humidifying
IDU for troubleshooting
humidifying IDU
After troubleshooting, is the
master IDU error code
Yes
Fault cleared
Note:
1. The error code can be queried after the humidifying IDU is connected to the wired controller or
the display box.
Panel or display box
Spot check interface
A72
Error in
No
cleared?
Display position (master IDU)
Wired controller
Error code is not
query displayed
Replace the the main control
board of the master IDU
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