Troubleshooting - Graco ThermoLazer 200TC Repair Manual

Troubleshooting

Problem
Kettle pilot burner does
not ignite or does not
remain ignited
Kettle burners shut off
before material is melted
ProMelt Only
3A1320L
Cause
Low or empty LP-gas tank
Gas supply hose not connected to tank
LP-gas tank shut-off valve closed
Manual gas shut-off valve closed
Gas lines leaking or disconnected
Kettle gas safety valve knob not in correct posi-
tion
Not providing adequate time for thermopile to
heat up
Kettle pilot igniter has weak battery
Kettle pilot electrode gap incorrect
Incorrect flame length and/or gas pressure
Strong wind blowing flame out
Burner and/or gas lines plugged
Kettle gas safety valve not functioning correctly
Thermopile not functioning correctly
Kettle pilot electrode ground wire not correctly
connected
Kettle pilot electrode lead wire has a short
Kettle pilot igniter not functioning correctly
Kettle burner regulator not functioning correctly
Material level is low
Over temperature safety switch not functioning
correctly
Solution
Replace with full tank.
Connect gas supply hose.
Open LP-gas tank shut-off valve.
Open manual gas shut-off valve.
Check for gas leaks. Connect and tighten fit-
tings.
Turn knob to "PILOT" position and fully push
in (see Operation manual).
See Operation manual.
Replace part (see Parts manual).
Adjust gap (see page 11).
Adjust flame and pressure (see Repair man-
ual).
Move ThermoLazer out of strong winds.
Make sure burner view ports are closed.
Unplug holes and lines. Isolate all gas regu-
lators if clearing line with forced air (see
page 6).
Replace part if it fails diagnostic test (see
page 6).
Replace part if it fails diagnostic test (see
page 12).
Clean connections and retighten. Replace
ground wire if damaged.
Replace part (see Parts manual).
Replace part (see Parts manual).
Replace part (see Parts manual).
Add material to kettle. Once material level is
up to thermometer, this condition will be cor-
rected.
Replace part (see Parts manual).
Troubleshooting
35