Procom ML1PHG Owner's Operation And Installation Manual page 20

Problem
ODS/pilot lights but flame
goes out when control
knob is released.
Burner(s) does not light
after ODS/pilot is lit.
Delayed ignition of
burner(s).
Burner backfiring during
combustion.
Burner plaque(s) does
not glow.
High yellow flame during
burner combustion
20
TROUBLESHOOTING
Possible Cause
1. Control knob is not fully
pressed in.
2. Control knob is not pressed
in long enough.
3. Equipment shutoff valve is
not fully open.
4. Thermocouple connection is
loose at control valve.
5. Pilot flame not touching
thermocouple, which allows
thermocouple to cool, caus-
ing pilot flame to go out. This
problem could be caused by
one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
6. Thermocouple damaged.
7. Control valve damaged.
1. Burner orifice is clogged.
2. Burner orifice diameter is too
small.
3. Inlet gas pressure is too low.
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Burner orifice is clogged or
damaged.
2. Burner is damaged.
3. Gas regulator is damaged.
1. Plaque is damaged.
2. Inlet gas pressure is too low.
3. Control knob set between
locked positions.
1. Not enough air.
2. Gas regulator is defective.
3. Inlet gas pressure is too low.
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Corrective Action
1. Press in control knob fully.
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds.
3. Fully open equipment shutoff
valve.
4. Hand tighten until snug, and
then tighten 1/4 turn more.
5. A) Contact local natural or
propane gas company
B) Clean ODS/pilot (see
Care and Maintenance,
page 18) or replace ODS/
pilot assembly
6. Replace thermocouple
7. Replace control valve.
1. Clean burner orifice (see
Care and Maintenance,
page 18) or replace burner
orifice.
2. Replace burner orifice.
3. Contact local gas supplier.
1. Contact local gas supplier.
2. Clean burner (see Care and
Maintenance, page 18) or
replace burner orifice.
1. Clean burner orifice (see
Care and Maintenance,
page 18) or replace burner
orifice.
2. Replace burner.
3. Replace gas regulator.
1. Replace burner.
2. Contact local gas company.
3. Turn control knob until it
locks at desired setting.
1. Check burner for dirt and
debris. If found, clean burner
(see Care and Maintenance,
page 18).
2. Replace gas regulator.
3. Contact local gas supplier.
200314-01D