Panasonic 2WAY Multi - A06 Engine Start Failure

IV–9
A06 Engine Start Failure
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Error detection method
When the engine will not start despite cranking being carried out 30 times (revolution speed detected) during
engine start-up (cranking = 5 seconds ON, 10 seconds OFF.)
* Enforced pauses of 3 minutes every 5 cranks and 10 minutes every 15 cranks are in effect.
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Troubleshooting
1
Engine
1-1
Has the fuel gas pressure dropped? Is the fuel empty? Measure the
pressure at the gas pressure measuring port during cranking.
OK 2-1
NG 1-2
1-2
Is the gas solenoid valve SW (S002 on the outdoor unit’s main board)
set at NORM?
Yes 4-1
No Set SW at NORM
2
Plug
2-1
Are spark emissions normal? (Remove plug and check outside. Or,
check with a timing light.)
Yes 3 -1
No 2-2
2-2
Are there any poor connections, poor contacts, poor crimping or
severed wires between the ignition wiring and the outdoor unit’s main
board connector 6P (white) CN010 and 6P (black)/CN011?
Yes Repair Wiring
No 2-3
2-3 Inspect ignition plug.
OK 7-1
NG Replace plug
3
Zero
governor
3-1 Inspect zero governor.
OK 5-1
NG Restore
4
Gas
solenoid
valve/Gas
adjustment
valve
4-1
Is DC180V being applied between the fuel gas solenoid valve relay
connector 4P-1 (white) No. 1 (+) and No. 2 (–) and between No. 3 (+)
and No. 4 (–) during cranking?
Yes 4-2
No 6-1
4-2
Is DC180V or more being applied between the fuel gas solenoid
valve coil terminals during cranking?
(See 4-4 for gas-type C models.)
Yes 4- 4
No 4-3
4-3
Are there any poor wiring connections, crimping or severed wires
between the fuel gas solenoid valve relay connector 4P-1 (white) and
the solenoid valve?
Yes Repair Wiring
No 4-4
4-4
Are fuel gas solenoid valve operations malfunctioning?
(Check for coil breakage, foreign matter, fuel gas passage blockages,
etc.)
OK 4-5
NG
Repair
(or replace)
4-5
Are the throttle (step motor) and fuel gas regulating valves operating
normally?
OK 5-1
NG Replace
5
Engine
5-1 Measure compression.
OK 5-3
NG 5-2
5-2
Check 6-1 again after washing the valve and adjusting the valve
clearance. Any problem with compression?
OK 5-3
NG
Replace engine
head
5-3 Is the air cleaner soiled? (Visual inspection)
OK 5-4
NG Clean/replace
5-4 Has the ignition timing been adjusted?
Yes 6 -1
No Adjust
6
Solenoid
valve wiring/
circuit board
6-1
Is 180V DC being applied between the outdoor unit’s power board
connector 7P (white) CN041 pin 1 (+) and pin 3 (–) and between pin 5
(+) and pin 7 (–) during cranking?
Yes 6 -2
No 6-3
6-2
Are there any poor connections, contacts, crimping or severed wires
between the outdoor unit’s power board connector 7P (white) CN041
and the fuel gas solenoid valve relay connector 4P-1 (white)?
Yes Repair Wiring
No 6-3
6-3
Is 200V AC being applied between the outdoor unit’s power board
connector 3P (white) CN002 No. 1 to No. 3?
Yes
Replace the
outdoor unit’s
power board
No 6-4
GHPtroubleshooting.indbIV‒9GHPtroubleshooting.indbIV‒9 2012/11/2611:20:062012/11/2611:20:06