Alarm
Code
Abnormality Transmitting between Main Unit and Sub Unit(s)
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 outdoor unit PCB1.
★
This alarm is indicated when transmission to outdoor unit B or C
,D
is NOT maintained for 30 seconds.
(Alarm code “31” will be indicated when transmission to all the outdoor units connected to O.U.~O.U.
transmission terminal is NOT maintained.)
Is LED1 turned ON on PCB1
of outdoor unit B and C
,D
?
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
O.U.: Outdoor Unit
225
