Desa VRL30PR - Manual (Page 29)

www.desatech.com 110021-01M 29
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
ODS/pilot lights but flame goes
out when control knob is re-
leased
One or more burners do not light
after ODS/pilot is lit
Delayed ignition of one or more
burners
Burner backfiring during com-
bustion
REMEDY
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. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 26) or replace ODS/pilot
assembly
6. Hand tighten until snug, then
tighten 1/4 turn more
7. Replace pilot assembly
8. Replace control valve
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner(s) (see Cleaning
and Maintenance, page 26) or
replace burner orifice(s)
3. Contact qualified service person
4. Reconnect leads (see Wiring
Diagram, page 33)
5. Replace battery in transmitter
and receiver
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner(s) (see Cleaning
and Maintenance, page 26) or
replace burner orifice(s)
3. Contact qualified service person
1. Clean burner (see Cleaning
and Maintenance, page 26) or
replace burner orifice
2. Replace damaged burner
3. Replace gas regulator
POSSIBLE CAUSE
1. Control knob not fully pressed in
2. Control knob not pressed in
long enough
3. Safety interlock system has
been triggered (Thermostat-
Controlled Models only)
4. Equipment shutoff valve not
fully open
5. 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
6. Thermocouple connection
loose at control valve
7. Thermocouple damaged
8. Control valve damaged
1. Inlet gas pressure is too low
2. Burner orifice(s) clogged
3. Mislocated crossover tube
4. Thermopile leads disconnected
or improperly connected (Re-
mote-Ready Models Only)
5. Burners will not come on in
remote position (Remote-
Ready Models Only)
1. Manifold pressure is too low
2. Burner orifice(s) clogged
3. Mislocated crossover tube
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective