DC INVERTER U-MATCH AIR CONDITION MAINTENANCE
100
Trouble
Code
Trouble
Name
Origin of
Trouble Signal
Control Description
under heating mode, all of the loads except the 4-way valve will be
stopped, while the indicator will blink or display the fault code F4
and the buzzer will alarm. After the fault is eliminated, the system
can automatically resume to operation and clear the fault code.
F5
Malfunction Of
Indoor
Environment
Sensor at Wire
Controller
Wired controller
If the wired controller is detected of open circuit or short circuit for 5
seconds successively, the indoor room temperature will forcibly set
to 24 . In this case, the system will not perform any treatment, only ℃
the indicator will blink or display the fault code. The system can
automatically resume to operation after the failure is eliminated.
Under fan mode, only the fault will be displayed, but the indoor unit
will run normally. The fault disappears after it is eliminated.
FF
All of The
Terminal Air
Valve Colsed
System The air valve on end will be fully closed.
CC
Wire Controller
Invalid
(not failure)
wire controller
the units is remotely monitored or controlled by centralized
controller and the wire controller’s functions are invalidated (not
failure)
EE
Keys Locked
(not failure)
wire controller keys on wire controller are locked (not failure)
Table2.Cassette Type Indoor Unit’s Error Indicating
LED No error
Flash times
every two
seconds
Error description
once the indoor ambient temperature
sensor error
twice the evaporator temperature sensor
error
three times the condenser temperature senor
error
four times the outdoor ambient temperature
senor error
yellow: Timing
indicating lamp
It goes on as per the set time, And
it flashes when the temperature
sensor error occurs
five times the discharge air temperature
sensor error
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