A03 Engine High-Revolution Error - Panasonic 2WAY Multi Technical & Service Manual

A03 Engine High-Revolution Error

Error detection method
Engine revolution speed is,
45.0 ~ 71.0 kw models
• Engine revolution speed is more than 2,300min
• Engine revolution speed is more than 2,400min
• Engine revolution speed is more than 2,500min
85.0 kw models
• Engine revolution speed is more than 2,700min
• Engine revolution speed is more than 2,800min
• Engine revolution speed is more than 2,900min
If any of above conditions occur, the engine stops momentarily and an error fl ag is set. An Engine Speed Too
High trouble is assumed when the error fl ag has stopped the engine 5 consecutive times in 1 hour. "
Troubleshooting
1
Check Measure actual revolution speed using a revolution meter. Was there
1-1
revolution high revolution when the error occurred?
speed
2
2-1 Is the throttle valve locked or sticking?
Mixer
3
3-1 Does the compressor have any reason for abnormally low load?
Compressor
4
Ignition 4-1 Ignition coil, cam angle sensor, and crank angle sensor
pulse
5 • Any poor connections, poor contact or broken wires between
Wiring throttle (step motor) wiring and connector? (Wiring from outdoor
5-1 main board connector 6P (black) CN066 to throttle (step motor))
• In the relay part, is the wiring for the throttle (step motor) and fuel
regulating valve crossed?
6 Does the throttle (step motor) coil resistance measure about 120Ω?
Mixer 6-1 (Disconnect relay connector 6P-1, and measure between No. 1 (red)
and No. 2/No. 3, and between No. 4 (orange) and No. 5/No. 6.)
Is 4 V DC applied between control board connector 6P (black)
CN066 No. 1 (+) and No. 2 (-)/No. 3 (-) as well as between No.
6-2
4 (+) and No. 5 (-)/No. 6 (-) when turning the power ON (during
positioning)?
● 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
continuously for 30 seconds
-1
continuously for 10 seconds
-1
continuously for 1 second
-1
continuously for 30 seconds
-1
continuously for 10 seconds
-1
continuously for 1 second
IV–5
Yes 2-1
No 4-1
Yes Repair
No 3-1
OK 5-1
NG Restore
Reset the power
Yes
after repair wiring
No 6-1
Yes 6-2
No Replace mixer
Yes Replace mixer
Replace outdoor
No
main board