Troubleshooting - Desa RFN30TA Operation And Installation Manual

WARNING: Turn off and unplug heater and let cool before servicing.
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.
Note: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM
When ignitor button is pressed,
there is no spark at ODS/pilot
When ignitor button is pressed,
there is spark at ODS/pilot but
no ignition
ODS/pilot lights but flame
goes out when control knob is
released
20

TROUBLESHOOTING

POSSIBLE CAUSE
1. Ignitor cable pinched or wet
2. Ignitor electrode not connected
to ignitor cable
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Ignitor electrode broken
6. Bad piezo ignitor
7. Ignitor electrode positioned
wrong
1. Gas supply turned off or equip-
ment shutoff valve closed
2. Control knob not in PILOT
position
3. Control knob not pressed in
while in PILOT position
4. A i r i n g a s l i n e s w h e n
installed
5. ODS/pilot is clogged
6. Gas regulator setting is not
correct
1. Control knob not fully pressed in
2. Control knob not pressed in
long enough
3. Safety interlock system has
been triggered
4. Equipment shutoff valve not
fully open
5. Thermocouple connection
loose at control valve
6. Pilot flame not touching ther-
mocouple, which allows ther-
mocouple 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
7. Thermocouple damaged
8. Control valve damaged
www.desatech.com
REMEDY
1. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry
2. Reconnect ignitor cable
3. Tighten nut holding piezo ignitor
to base panel of log set. Nut is
located behind base panel
4. Replace ignitor cable
5. Replace ignitor
6. Replace piezo ignitor
7. Replace ignitor
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while in
PILOT position
4. Continue holding down control
knob. Repeat igniting operation
until air is removed
5. Clean ODS/pilot (see Cleaning
and Maintenance, page 19) or
replace ODS/pilot assembly
6. Replace gas regulator
1. Press in control knob fully
2. After ODS/pilot lights, keep con-
trol knob pressed in 30 seconds
3. Wait one minute for safety in-
terlock system to reset. Repeat
ignition operation
4. Fully open equipment shutoff
valve
5. Hand tighten until snug, then
tighten 1/4 turn more
6. A) Contact local natural gas
company
B) Clean ODS/pilot (see Clean-
ing and Maintenance, page 19)
or replace ODS/pilot assembly
7. Replace thermocouple
8. Replace control valve
109889-01B