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4. Service procedures
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2
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4
Section
– 59 –
SM830076
Wired remote
controller
display
Wireless remote
controller
display
Possible causes of troubles
Operation lamp and heat
stand-by lamp flash
alternately.
O: Operation lamp
O: Timer lamp
ⅷ:Heat stand-by
lamp
• Fault with
compressor
and its circuit
• Thermistor failure
F01
F02
F10
F04
F06
F07
F29
H01
H02
H03
H17
H18
ⅷ:Operation lamp
O: Timer lamp
ⅷ:Heat stand-by
lamp
O: flashes
ⅷ: OFF
Protective device for
compressor is activated.
Indoor coil temp. (E1) cannot be detected.
Indoor coil temp. (E2) cannot be detected.
Indoor room temperature cannot be detected.
Discharge gas temp. cannot be detected.
Outdoor coil liquid temp. (C1) cannot be detected.
Outdoor coil gas temp. (C2) cannot be detected.
• Non volatile memory IC (EEPROM) is abnormal (Indoor control panel)
Compressor motor is overloaded.
Compressor motor is locked.
Compressor current detection circuit is defective.
Power supply voltage between phases is unbalanced.
Standard comp. contactor (Mg SW)is chattering.
Indoor thermistor is either
open or short.
Outdoor thermistor is either
open or short.