Panasonic U-26PE1U6 Technical Data & Service Manual page 250

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