Shark HNG-3530, Operator'S Manual, Page: 18 / 44

97-610, 97-6152 • REV. 7/04
PRESSURE
W
ASHER
T
ro
u
b
leshooting Guide
18
TROUBLESHOOTING
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 oriface.
Improper alignment of sensor in pilot flame Adjust alignment - see figure 6, page 15.
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 oriface.
Improper alignment of sensor in pilot flame Adjust alignment - see figure 6, page 15.
Faulty main gas operator in gas control Test gas valve - repair/replace.
Faulty flame sensor Test sensor, wiring - repair/replace.
LOW OPERATING
PRESSURE Faulty pressure gauge Install new gauge.
Insufficient water supply Use larger garden hose. Clean filter washer at water inlet.
Old, worn or incorrect spray nozzle Match nozzle number to machine and/or replace with new
nozzle.
Belt slippage Tighten or replace. Use correct belt.
Plumbing or hose leak Check plumbing system for leaks. Retape leaks with teflon
tape.
Faulty or misadjusted unloader valve (where
applicable)
Adjust unloader for proper pressure. Install repair kit when
needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet or discharge valves in
pump Clean inlet and discharge valve.
Worn inlet or discharge valves Replace with valve kit.
Obstruction in spray nozzle Remove obstruction.
Leaking pressure control valve (where
applicable)
Rebuild or replace as needed.
Detergent metering valve left open sucking air
or faulty metering valve
Close and/or replace metering valve.
Slow motor RPM Check incoming voltage.
LOW WATER
TEMPERATURE
Improper size of gas lines See page 8 for sizing of gas lines.
Low gas pressure Increase gas pressure to machine.
Improper pressure regulator Specify BTU, building gas pressure 11 w.c.i. to machine for
correct sizing of regulator.
Low gas pressure Increase gas pressure as described on page 10.
Soot buildup on coils not allowing heat
transfer
Clean coils.
Improper burner nozzle See serial plate.