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[Self diagnosis by indoor indicator lamp]
You can locate the cause of trouble from the manner of flashing of the Timer lamp on the indoor unit display.
Flashing made of Timer lamp Reasons of indication Check parts
1 time
13 times
14 times
15 times
(1) In Heating, total stop when
indoor heat exchanger
temperature is low.
(2) In cooling, total stop when
indoor heat exchanger
temperature is high.
Total stop when abnormal
Exchanged signals, between
IC301/IC302 and micro computer.
Total stop when heat exchanger
thermistor is short-circuited or
open circuited. (Reset)
Total stop when room
temperature thermistor is short-
circuited or open circuited.
(Reset)
(1) Reversing valve (outdoor)
(2) Reversing valve relay
(3) IC 702
(4) Heat exchanger thermistor
(1) IC301/IC302
(1) Heat exchanger thermistor
(2) Check the continuity CN12
Room temperature thermistor
5 sec.
5 sec.
5 sec.
5 sec.
CAUTION
Remote control is disabled while the Timer lamp is flashing.
To check operation, turn off the power switch and turn it on again.
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