Hitachi RAS-5182CH Service Seite 84

[Self diagnosis by indoor indicator lamp]
Flashing made of Timer lamp
Reasons of indication
(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
1C301 and micro computer.
Total stop when heat exchanger
thermistor is short-circuited or
open circuited. (Reset)
(1) Total stop when room
temperature thermistor is
short-circuited or open
circuited. (Reset)
(2) Total stop when over-current
is detected at indoor fan motor.
Remote control is disabled while the Timer lamp is flashing.
To check operation, turn off the power switch and turn it on again.
- 88 -
~ Check parts
(1) Reversing valve (outdoor)
(2) Reversing valve relay
(3) 10701 5 . sad oes
(4) Heat excharger thermistor
(1) 1C3014
(1) Heat exchanger thermistor
(2) Check the continuity CN12
(1) Room temperature thermistor
(2) Indoor fan motor