Technical data

4. Service procedures
1
12
3
4
5
IV - 8
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
䢇: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.
䢇:Operation
lamp
O: Timer lamp
䢇: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
䢇: OFF