A27 Catalyst Temperature Error (For Only Models With Catalyst Option - Panasonic 2WAY Multi Technical & Service Manual

A27 Catalyst Temperature Error (for only models with catalyst option)

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.
Troubleshooting
1
1-1 Check the wiring and connectors. Everything OK?
Unit error
1-2 Thermistor operating properly?
1-3 Inspect ignition timing. Everything OK?
● 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
200°C
300°C
400°C
500°C
600°C
650°C
700°C
750°C
800°C
• 1-3 See Chapter 5 for timing adjustment.
96.0KΩ
13.5KΩ
3.3KΩ
1.15KΩ
514Ω
268Ω
198Ω
151Ω
122Ω
98Ω
IV–27
Yes 1-2
No Repair wiring
OK 1-3
NG Replace thermistor
Replace outdoor main
Yes
board
No Adjust