Desa GVC35NA - Manual (Page 25)

25
100749
TROUBLE-
SHOOTING
Continued
REMEDY
1. Fully open manual
shut-off valve.
2. Press in control knob
fully.
3. After pilot lights, keep
control knob pressed in
30 seconds.
4. Wait one minute for
safety interlock system
to reset. Repeat ignition.
5. Hand tighten until
snug, then tighten 1/4
turn more.
6. A) Contact qualified
service person to
properly adjust pilot
flame
B) Contact local
natural gas company.
C) Clean pilot (see
Cleaning and Mainte-
nance, page 23) or
replace pilot assembly.
7. Replace thermocouple.
8. Replace control valve.
1. Fully depress control
knob in any position
other than pilot. Wait one
minute for safety inter-
lock system to reset. Re-
peat ignition.
2. Clean burner (see
Cleaning and Mainte-
nance, page 23) or
replace burner orifice
(see Changing Burner
Orifice, page 30).
3. Replace burner orifice
(see Changing Burner
Orifice, page 30).
4. Contact local natural
gas company.
1. Contact local natural
gas company.
2. Clean burner (see
Cleaning and Mainte-
nance, page 23) or
replace burner orifice
(see Changing Burner
Orifice, page 30).
OBSERVED
PROBLEM
Pilot lights but flame
goes out when
control knob is
released.
Burner does not light
after pilot is lit.
Delayed ignition of
burner.
POSSIBLE
CAUSE
1. Manual shutoff valve
not fully open.
2. Control knob not fully
pressed in.
3. Control knob not
pressed in long
enough.
4. Safety interlock system
has been triggered.
5. Thermocouple connec-
tion loose at control
valve.
6. Pilot flame not touching
thermocouple, which
allows thermocouple to
cool, causing pilot
flame to go out. This
problem could be
caused by any or all of
the following:
A) Improperly ad-
justed pilot flame
B) Low gas pressure
C) Dirty or partially
clogged pilot
7. Thermocouple damaged.
8. Control valve damaged.
1. Safety interlock
system has been
inadvertently trig-
gered.
2. Burner orifice is
clogged.
3. Burner orifice diameter
is too small.
4. Inlet gas pressure is
too low.
1. Manifold pressure is
too low.
2. Burner orifice is
clogged.
Continued