Panasonic 2WAY Multi - A27 Catalyst Temperature Error (for Only Models with Catalyst Option

IV–27
A27 Catalyst Temperature Error (for only models with catalyst option)
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Error detection method
• When a catalyst temperature exceeding 700°C is detected continuously for 10 seconds during engine
operation, the engine is stopped and an error fl ag is set.
A Catalyst Temp. Trouble is assumed when this fl ag has shut down the engine 5 consecutive times in 1 hour.
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Troubleshooting
1
Unit error
1-1 Check the wiring and connectors. Everything OK?
Yes 1-2
No Repair wiring
1-2 Thermistor operating properly?
OK 1-3
NG Replace thermistor
1-3 Inspect ignition timing. Everything OK?
Yes
Replace outdoor main
board
No Adjust
● For work procedure for replacing outdoor main board, see “5. Reference Document”.
● 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
• 1-2 Thermistor resistor values
100°C 96.0KΩ
200°C 13.5KΩ
300°C 3.3KΩ
400°C 1.15KΩ
500°C 514Ω
600°C 268Ω
650°C 198Ω
700°C 151Ω
750°C 122Ω
800°C 98Ω
• 1-3 See Chapter 5 for timing adjustment.
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