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23
Maintenance
Troubleshooting
PROBLEM
POSSIBLE CAUSE
SOLUTION
NO SPARK -- NO
PILOT GAS
No main power
Restore power.
Faulty limit switch
Test/replace.
Faulty wiring
Test wiring.
NO PILOT
LIGHT
No gas supplied to pilot valve
Check for availability of gas.
Manual valves in “OFF” position
Turn manual valve and gas cock to full “ON”. Check
pilot key adjustment.
Faulty pilot valve
Test gas valve.
Faulty wiring
Test wiring.
Restricted pilot line or clogged
pilot orifice
Clean pilot tubing and orifices.
PILOT LIT,
BUT MAIN
BURNER WON’T
COME ON
Faulty wiring
Test wiring.
Low pilot flame
Check inlet pressure, pilot orifice position. Adjust
with pilot key.
Faulty main gas operator in gas
control
Test gas valve. Repair/replace.
PILOT CYCLES
OFF AND ON
BY ITSELF
Faulty pilot valve
Test pilot valve.
Faulty wiring
Test wiring.
MAIN BURNER SHUTS
DOWN
Low pilot flame
Check inlet pressure, pilot orifice position. Adjust
pilot.
Faulty main gas operator in gas
control
Test gas valve. Repair/replace.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Содержание NG-3000
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