Kaysun KCT-03 SR, Installation And Owner'S Manual

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27
Troubleshooting
Error code and
description
Possible Causes Possible Solutions
No display on the
wired controller
IDU is not powered on Power on the IDU.
Wired controller connection error
First power off the IDU, and then check
if the wired controller connection is
correct. See Section 3.4 on the wiring
requirements.
Wired controller damaged Replace the wired controller.
Power supply failure of the IDU main PCB Replace the IDU main PCB.
E9
Wired controller
and IDU
communication
fault
IDU has no address or IDU address duplicated
Set an address for the IDU; duplicated
IDU addresses are not allowed in the
same system.
Wired controller damaged Replace the wired controller.
IDU main PCB fault Replace the IDU main PCB.
Some functions
of the indoor
unit cannot be
controlled, such
as ON/OFF,
temperature, mode,
fan speed and wired
controller lock.
The " " icon in the wired controller is always
on.
Check if the indoor unit has been locked
by the centralized controller.