Hitachi RAS-18G5 Service Manual page 48

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
– – – – – – – 2 times
1
2
3
4
5
( – – 0.5 second on, 0.5 second off.)
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.
Force cooling operation
Unit is under forcible operation
or under balancing after forcible
operation.
DC Fan motor - over current of
electricity
– – –– 10 times
Indoor - DC Fan motor has over
current of electricity.
IC 401 Data read wrongly
In case that data read from IC401
– – – 13 times
is wrong.
Heat exchanger thermistor
error
– – – 14 times
Heat exchanger thermistor open
or short-circuit detected.
Room thermistor error
Room thermistor error open or
– – –– 15 times
short-circuit detected.
Indication Factor
– 52 –
Estimated Break-Down Part
Check force cooling switch at
indoor electrical.
(1) Indoor - Fan is locked.
(2) Indoor - Fan motor damage.
(3) Indoor - control circuit board.
IC401 data is not in order.
(1) Thermistor
(2) Indoor - control circuit board.
(1) Thermistor
(2) Indoor - control circuit board.