Hitachi RAC-07G4, Service Manual

Page: 60 / 70

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CAUTION
Remote control is disabled while the Timer lamp is flashing.
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
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
( – – 0.5 second on, 0.5 second off.)
– – – – 15 times
– – – 14 times
– – – 13 times
– – – – – – – 2 times
5
sec.
5
sec.
5
sec.
5
sec.
!
DC Fan motor - over flow of
electricity
Indoor - DC Fan motor has over
flow of electricity.
(1) Indoor - Fan is locked.
(2) Indoor - Fan motor damage.
(3) Indoor - control circuit board.
– – – – 10 times
5
sec.