Procom ML300HGA - Manual (Page 14)

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TROUBLESHOOTING
Note : All troubleshooting
items are listed in order of
operation. WARNING: Only a qualified
service person should service and
repair heater.
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot. This can damage
ODS/pilot unit.
OBSERVED PROBLEM
When ignitor button is pressed in,
there is no spark at ODS/pilot.
When ignitor button is pressed in,
there is a spark at ODS/pilot but no
ignition.
ODS/pilot lights but flame goes out
when control knob is released.
POSSIBLE CAUSE
1. Ignitor electrode is positioned
wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode is not connected
to ignitor cable.
4. Ignitor cable pinched or wet.
5. Broken ignitor cable.
6. Bad piezo ignitor.
1 . G a s s u p p l y t u r n e d o f f o r
equipment shutoff valve is closed.
2. Control knob not fully pressed in
while pressing ignitor button.
3. Air in gas lines when installed.
4. ODS/pilot is clogged.
5. Gas regulator setting is not correct.
6. Control knob not in PILOT position.
7. Depleted gas supply.
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 loose
at control valve.
5 P i l o t f l a m e i s n o t t o u c h i n g
t h e r m o c o u p l e . T h i s a l l o w s
thermocouple to cool, causing 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.
REMEDY
1. Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by
any metal or tubing. Keep
ignitor cable dry.
5. Replace ignitor cable.
6. Replace piezo ignitor.
1. Turn on gas supply of open
equipment shutoff valve.
2. Fully press in control knob
while pressing ignitor button.
3. Continue holding down control
knob. Repeat igniting operation
until air is removed.
4. Clean ODS/pilot (see Cleaning
and Maintenance. Page 13) or
replace ODS/pilot assembly.
5. Replace gas regulator.
6. Turn control knob to pilot position.
7. Contact local propane/LP gas
campany.
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, then
tighten 1/4 turn more.
5. A) Contact local propane/LP gas
company.
B) Clean ODS/pilot (see Cleaning
and Maintenance. Page 13) or
replace ODS/pilot assembly.
6. Replace thermocouple.
7. Replace control valve.