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4-6
4. Service procedures
Judgment condition
Clear condition
P29
F04
F06
Alarm
contents
Judgment and correction
Recovery at restart
Recovery at restart
Recovery at restart
Recovery at restart
Recovery at restart
Current detection
circuit trouble
• AC current value is
high even when
compressor is
stopped.
Inverter stops after alarm is
detected. Alarm is output
when inverter stops (pre-trip)
consecutively 4 times.
1. Stops immediately when
restarted.
• Layer short in the
compressor
2. Check inverter control PCB.
• Wiring trouble
Compressor motor
output trouble,
Inverter compressor
trouble,
MDC trouble
Inverter stops after alarm is
detected.
1. Refrigerant cycle trouble,
overload operation
2. Loose screws and contact
failure between HIC control
PCB and radiating plate
3. Cooling failure of radiating
plate
4. Check outdoor unit PCB
wiring.
Compressor does not
run. (Overcurrent
protection circuit
activates after a certain
period of time following
compressor start.)
Inverter stops after alarm is
detected.
1. Compressor trouble (locked,
etc.)
• Replace the compressor.
2. Compressor wiring trouble
(missing phase)
Compressor
breakdown
• Starts to operate but
operating frequency
drops and
compressor stops.
Inverter stops after alarm is
detected.
1. Check power voltage: AC
2. Refrigerant cycle overload
operation
3. Check AC current detection
circuit.
Inverter control PCB
position detection
circuit trouble
Inverter stops after alarm is
detected.
Position detection circuit is
activated even when the
compressor 3P connector is
disconnected and the
compressor operated.
• Replace the inverter control
PCB.
Disconnection, open
circuit, or short circuit
in discharge temp.
sensor (TD)
Sensor detection trouble
minutes have elapsed after
compressor stopped).
(Open circuit)
Automatic recovery
Automatic recovery
1. Check discharge temp.
sensor (TD).
2. Check outdoor unit control
PCB.
Open circuit or short circuit
Disconnection, open
circuit, or short circuit
in outdoor heat
exchanger temp.
sensor (C1)
1. Check outdoor heat
exchanger temp. sensor (C1).
2. Check outdoor unit control
PCB.
Remote
controller
alarm display
Open circuit or short circuit Automatic recovery
2. Check outdoor unit control
PCB.
yrevocercitamotuAtiucrictrohsrotiucricnepO21F Disconnection, open
circuit, or short circuit
in intake temp. sensor
(TS)
1. Check intake temp. sensor
(TS).
2. Check outdoor unit control
PCB.
203 V ± 20 V or 230 V ± 23 V.
26, 36 MODEL:
42 MODEL:
Sensor defection trouble
(194°F or higher when 60
minutes have elapsed after
compressor stopped).
(Open circuit)
F07
Disconnection, open
circuit, or short circuit
in outdoor heat
exchanger temp.
sensor (C2)
1. Check outdoor heat
exchanger temp. sensor (C2).
Open circuit or short circuit Automatic recovery
2. Check outdoor unit control
PCB.
F08
Disconnection, open
circuit, or short circuit
in outdoor air temp.
sensor (TO)
1. Check outdoor air temp.
sensor (TO).
(194°F or higher when 15
4