4. Service procedures
1
1
2
3
4
5
IV - 8
SM830080
Wired remote
controller
display
Wireless remote
controller
display
Possible causes of troubles
•
Thermistor failure
Operation lamp
and heat stand-by
lamp flash
alternately.
O
: Operation
lamp
O
: Timer lamp
v
:Heat stand-
by lamp
Indoor thermistor is either
open or short.
Outdoor thermistor is either
open or short.
Indoor coil temp. (E1 = TH2) cannot be detected.
Indoor coil temp. (E2 = TH3) cannot be detected.
Indoor room temperature cannot be detected.
Discharge gas temp.A (PC compressor=TH0A) cannot be detected.
Outdoor coil liquid temp. (C1 = TH0E) cannot be detected.
Outdoor coil gas temp. (C2 = TH0C) cannot be detected.
v
:Operation
lamp
O
: Timer lamp
v
:Heat stand-
by lamp
Protective device for
compressor is activated.
PC compressor motor is overloaded.
PC compressor motor is locked.
Compressor current detection circuit is defective.
Low-pressure protector is activated.
(Low pressure switch or low pressure prevention.)
Standard comp. contactor (Mg SW)is chattering.
F01
F02
F10
F04
F06
F07
H01
H02
H03
H06
H18
•
Fault with
compressor
and its circuit
O
: flashes
v
: OFF