Graco ThermoLazer 200TC Repair Manual page 36

Troubleshooting
Problem
Kettle main burners do
not ignite or are not burn-
ing correctly
Kettle main burners do
not shut off
Kettle main burner does
not turn on
Thermometer not match-
ing material temperature
in kettle
36
Cause
Kettle gas safety valve knob not at correct posi-
tion
Kettle temperature control dial set at a lower
temperature than material temperature
Kettle gas safety valve not functioning correctly
Burner and/or gas lines plugged
Kettle temperature control not functioning cor-
rectly
Gas lines have been disconnected
Incorrect flame length and/or gas pressure
Kettle gas safety valve knob not at correct posi-
tion
Kettle temperature control dial is not turned to a
setting lower than material temperature
Kettle temperature control not functioning cor-
rectly
Kettle gas safety valve not functioning correctly
Kettle temperature control dial is not turned to a
setting higher than material temperature
Kettle temperature control not functioning cor-
rectly
Kettle gas safety valve not functioning correctly
Over temperature safety switch not functioning
correctly
Material has not reached temperature control set
point
Material not fully agitated
Cool or windy ambient conditions
Thermometer calibrated incorrectly
Kettle temperature control calibrated incorrectly
Thermometer not functioning correctly
Kettle temperature control not functioning cor-
rectly
Kettle gas safety valve not functioning correctly
Incorrect flame length and/or gas pressure
Solution
Turn knob to ON position (see Operation
manual).
Turn kettle temperature control dial to tem-
perature 25° F (13.9° C) higher than material
temperature.
See Repair manual and replace part if it fails
diagnostic testing.
Unplug holes and lines. Isolate all gas regu-
lators if clearing line with forced air (see
page 20).
Replace part (see Parts manual).
Connect and tighten hose fittings. Check for
gas leaks.
Adjust flame and pressure (see page 18).
Replace part (see Parts manual).
Turn kettle temperature control dial to a set-
ting 25° F (13.9° C) (minimum) lower than
material temperature.
Replace part (see Parts manual).
Replace part if it fails diagnostic testing (see
page 6).
Turn kettle temperature control dial to a set-
ting 25° F (13.9° C) (minimum) higher than
material temperature.
Replace part (see Parts manual).
Replace part if it fails diagnostic test (see
page 6).
Replace part (see Parts manual).
Allow time for material to reach operating
temperature.
Agitate material.
Move ThermoLazer out of cool windy condi-
tions. Discharge material and check ther-
mometer.
Calibrate thermometer (see page 10).
See Repair manual and replace part if it can
not be calibrated (see Parts manual).
Replace part (see Parts manual).
Replace part (see Parts manual).
Replace part if it fails diagnostic test (see
page 6).
Adjust flame and pressure (see page 18).
3A1320L