Panasonic 36PST1U6 26PEU1U6 Owner's Manual - Page 170

Judgment condition, Clear condition, Alarm, contents, Judgment and correction, Remote, controller

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4. Service procedures Remote controller alarm display Alarm contents Judgment condition Clear condition Judgment and correction P29 Current detection Inverter stops after alarm is Recovery at restart 1. Stops immediately when circuit trouble detected. Alarm is output restarted. • AC current value is when inverter stops (pre-trip) • Layer short in the high even when consecutively 4 times. compressor compressor is 2. Check inverter control PCB. stopped. • Wiring trouble Compressor motor output trouble, Inverter compressor trouble, MDC trouble Inverter stops after alarm is detected. Recovery at restart 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. Recovery at restart 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. Recovery at restart 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. Inverter control PCB position detection circuit trouble Inverter stops after alarm is detected. Recovery at restart Position detection circuit is activated even when the compressor 3P connector is disconnected and the compressor operated. • Replace the inverter control PCB. F04 Disconnection, open 26, 36 MODEL: Automatic recovery 1. Check discharge temp. circuit, or short circuit Sensor detection trouble sensor (TD). in discharge temp. sensor (TD) (194°F or higher when 15 minutes have elapsed after compressor stopped). 2. Check outdoor unit control PCB. (Open circuit) 42 MODEL: Sensor defection trouble (194°F or higher when 60 minutes have elapsed after 4 compressor stopped). (Open circuit) F06 F07 F08 F12 Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C1) Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C2) Disconnection, open circuit, or short circuit in outdoor air temp. sensor (TO) Open circuit or short circuit Open circuit or short circuit Open circuit or short circuit Disconnection, open circuit, or short circuit in intake temp. sensor (TS) Open circuit or short circuit Automatic recovery 1. Check outdoor heat exchanger temp. sensor (C1). 2. Check outdoor unit control PCB. Automatic recovery 1. Check outdoor heat exchanger temp. sensor (C2). 2. Check outdoor unit control PCB. Automatic recovery Automatic recovery 1. Check outdoor air temp. sensor (TO). 2. Check outdoor unit control PCB. 1. Check intake temp. sensor (TS). 2. Check outdoor unit control PCB. 4-6

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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.
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2
1
F
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