Hitachi RAS-07BH1 - Error Diagnosis; Timer Lamp Blinking Codes

– 43 –
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)
Outdoor unit operating by
compulsion
Outdoor unit is under forcible
operation or under balancing after
forcible operation.
Outdoor electrical goods.
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
5
sec.
5
sec.
5
sec.
5
sec.
( –– 0.5 second on, o.5 second off.)
5
sec.
–– 15 times
–– 14 times
–––––– 2 times
–––––––– 1 time
5
sec.
–– 13 times
IC 401 Data read wrongly
In case that data read from IC401
is wrong.
IC401 is not in order.