Shark HNG • 9.801-195.0 • Rev. 4/14
21
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
PROBLEM
POSSIBLE CAUSE
SOLUTION
NO SPARK -
NO PILOT GAS
No main power
Restore power.
Faulty limit switch
Test/replace.
Faulty wiring
Test wiring.
SPARK -
BUT 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 GAS -
BUT NO SPARK
Broken or shorted electrode
assembly
Test/replace.
PILOT LIT - BUT
MAIN BURNER
WON'T COME ON
Faulty wiring
Test wiring.
Low pilot flame
Check inlet pressure, pilot orifice.
Improper alignment of sensor in
pilot flame
Adjust alignment - see figure 7, page 14.
Faulty main gas operator in gas
control
Test gas valve - repair/replace.
Faulty flame sensor
Test sensor, wiring - repair/replace.
PILOT CYCLES
OFF AND ON
BY ITSELF
Faulty pilot valve
Test gas valve.
Faulty wiring
Test wiring.
MAIN BURNER
SHUTS DOWN
Low pilot flame
Check inlet pressure, pilot orifice.
Improper alignment of sensor in
pilot flame
Adjust alignment - see figure 7, page 14.
Faulty main gas operator in gas
control
Test gas valve - repair/replace.
Faulty flame sensor
Test sensor, wiring - repair/replace.
TROUBLESHOOTING
