A10 Exhaust Gas Temperature High - Panasonic 2WAY Multi Technical & Service Manual

A10 Exhaust Gas Temperature High

Error detection method
During engine operation (complete combustion), when the exhaust gas temperature ≥ 130°C continuously for 10
seconds, the engine is stopped momentarily and an error fl ag is set.
An Exhaust Gas Temp. High error is assumed when this fl ag has shut down the engine once.
Troubleshooting
1
Exhaust gas 1-1 Measure the actual exhaust gas temperature. Is it high?
temperature
2
Is there any sign of the coolant leaking?
Coolant
• Check the base and around the base.
amount
2-1
• Check the amount in the reserve tank.
check
• Check the coolant route (detached hose, etc.)
Is the coolant pump operating normally?
• Carry out an inspection while referring to A22.
2-2 • Are there any fl uctuations in coolant pump revolutions
or repeated starts/stops, etc., when the coolant pump is
operating?
3
Exhaust
Is there heavy soiling on the inside of the exhaust gas tube on
gas heat 3-1
the exhaust gas heat exchanger?
exchanger
check
4
Measure the resistance on the exhaust gas temperature
Wiring and
4-1 sensor (see "5. Reference Document" for details on thermistor
thermistor
characteristics.)
check
● For board and Electrical Wiring Diagram, see Chapter 6.
• Outdoor main board: page VI-2
• Outdoor power board: page VI-3
• Converter board: VI-4
• Indoor control board for DC motor models: page VI-5
• Outdoor Unit Electrical Wiring Diagram: page VI-6
IV–13
Yes 2-1
No 4-1
OK 2-2
Repair the leaks and
then refi ll with coolant
NG
and perform an air
purge.
OK 3-1
There is a possibility
that air has become
NG mixed in, so refi ll with
coolant and perform an
air purge.
Replace the exhaust gas
Yes
heat exchanger
No 4-1
Outdoor unit's power
OK
board
NG Replace the sensor