Alarm
Code
Abnormal Transmitting between Outdoor Units
ϥ
“RUN” light is flashing and “ALARM” are indicated on the
wired
remote control switch.
ϥ
The unit No., alarm code and the unit code are alternately indicated on the set temperature section,
and the unit No. and alarm code are indicated on the display of the outdoor unit PCB1.
★
This alarm is indicated when the following condition occurs after normal transmitting between outdoor
unit and outdoor unit is maintained;
Abnormality is maintained for 30 seconds.
Abnormality is maintained for 30 seconds even after micro-computer reset (automatically).
Is LED1 turned ON on PCB1
of outdoor unit B and C?
Is operating line between
outdoor unit and outdoor unit
loosened or disconnected?
No
No
Turn ON the power supply.
Replace the PCB1 of
outdoor unit B or C.
Correctly connect the
operating line between
outdoor unit and outdoor
unit. Also, reset
the power supply.
Replace the PCB1 of
outdoor unit B or C.
Inspect the cause and
replace the fuse.
Yes
Yes
Yes
No
Check the power supply
of outdoor unit.
Is fuse of outdoor unit
PCB1 blown out?
Good
Faulty
Unit A
(Main)
Unit B
(Sub)
Unit C
(Sub)
Outdoor Unit
PCB1: Control PCB in Outdoor Unit
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