Hitachi RAC-08LH1, Service Manual, Page: 63 / 76

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CAUTION
Remote control is disabled while the Timer lamp is fl ashing.
To check operation, turn off the power switch and turn it on again.
Timer-Lamp, break-down checking in blinking sign.
Check the break-down factor from the frequency of timer-lamp blinking.
No. Mode of Timer-Lamp blinking Indication Factor Estimated Break-Down Part
4-way valve not working
Inside temperature is low in
heating operation time or inside
temperature is high in cooling
operation time.
(1) 4-way valve is not working.
(2) Heat-exchanger thermistor is
in disconnection.
(Only heating time)
Force cooling operation
Unit is under forcible operation
or under balancing after forcible
operation.
Check force cooling switch at
indoor electrical.
IC 401 Data read wrongly
In case that data read from IC401
is wrong.
IC401 data is not in order.
Heat exchanger thermistor
error
Heat exchanger thermistor open
or short-circuit detected.
(1) Thermistor
(2) Indoor - control circuit board.
Room thermistor error
Room thermistor error open or
short-circuit detected.
(1) Thermistor
(2) Indoor - control circuit board.
1
2
3
4
5
6
( – – 0.5 second on, 0.5 second off.)
– – –– 15 times
– – – 14 times
– – – 13 times
– – – – – – – 2 times
– – – – – – – – 1 time
!
DC Fan motor - over current
of electricity
Indoor - DC Fan motor has over
current of electricity.
(1) Indoor - Fan is locked.
(2) Indoor - Fan motor damage.
(3) Indoor - control circuit board.
– – – 10 times