PEM SprayWand P-500, Manual

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Gas burner malfunction
Problem Probable cause Solution
Pilot will not light
(temperature light does
not turn on). 1. Gas cock dial turned off
2. Gas leak
3. Low or High gas pressure
4. Air in gas line (common
after a new LP bottle is
installed)
5. Pilot adjustment screw
needs readjustment.
6. Intermittent ignition
a.
Not working
b. Weak or no spark
c. Pilot solenoid not
working
d. Electrodes damaged or
out of adjustment
1. Turn dial on.
2. Check fittings with soapy water, and tighten any loose fittings
3. Check the pressure with a manometer. If LPG pressure is low, the
cylinder may be empty or “cold. If natural gas pressure is low, the
supply pipe may be too small or the gas supply is inadequate.
4. Vent through the open hose, and then reconnect to the burner (allow
ample time for the air to escape).
5. Adjust the flame to reasonable size.
6. (also see the table for the intermittent ignition device below)
a.
Check or replace ignition harness and electrodes, which are
located under the burner. Check voltage supply to electronic
module
b. Check power supply or voltage
c. Replace solenoid
d. Readjust or replace.
Pilot will not stay lit 1. Draft extremes
2. Defective electrode
3. Undersized gas supply pipe
or hose resulting in a wide
swing in gas pressure in
burner on/burner off
4. intermittent ignition
a. Defective ignition
electrode wire
connection or
electrode.
b. Module defective
c. Electrode out of
adjustment
1. Install a draft diverter (see the Installation section), or relocate the
machine to a less drafty area, or provide shields or walls to isolate the
burner.
2. Replace electrode
3. Install a larger gas supply hose.
4. Adjust the flame to reasonable size.
5. Fix intermittent ignition as follows:
a.
Repair
b. Replace
c. Adjust
Burner will not light 1. No fuel
2. Pilot out
3. Thermostat set too low.
4. Faulty thermostat
5. Burner control circuit dead
6. Flow or vacuum switch
faulty
1. Natural gas: open supply line valve; L.P.: open valve or install new
bottle
2. Turn burner switch off, and then back on.
3. Reset thermostat.
4. Check continuity with high-voltage tester and test light. Replace if
faulty
5. Check for loose connection or broken wires. Reestablish power.
6. Check switch for continuity. Replace if necessary.
Burner smokes 1. Inadequate draft or
combustion air
2. Dirty or clogged gas jet
3. High gas pressure
1. Contact a qualified heating expert to check for chimney draft or
combustion air.
2. Contact a certified service technician.
3. Contact a certified service technician
Burner fails to turn on
and off with operation
of wand trigger 1. Flow switch faulty
2. Faulty gas valve
1. Hold the trigger on the gun open, and shut the burner switch off and
turn pump switch off to relieve pressure. Continue to hold the
trigger until the burner extinguishes, and then turn the Pump switch
off. Contact a certified service technician
2. Contact a certified service technician.
Low temperature
output 1. Low gas supply pressure
2. Thermostat set to low
1. Contact a gas service person.
2. Increase the thermostat setting.