Superior MNF24ONM Installation And Operation Instructions Manual page 20

OBSERVED PROBLEM
ODS/pilot lights but fl ame goes out
when control knob is released
Burner does not light after pilot is lit
Delayed ignition of burner
Burner backfi ring during combustion
20
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
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. Pilot fl ame not touching thermo-
couple, which allows thermo-
couple to cool, causing pilot fl ame
to go out. This problem could be
caused by one or both of the fol-
lowing:
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 orifi ce(s) clogged
3. Thermopile leads disconnected
or improperly connected.
4. Remote selector in OFF position
5. Wire disconnected from gas con-
trol
1. Manifold pressure is too low
2. Burner orifi ce clogged
3. Mislocated crossover tube
1. Burner orifi ce is clogged or dam-
aged
2. Damaged burner
3. Gas regulator defective
SuperiorFireplaces.us.com
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep control
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 pro-
pane/LP gas company
5 B) Clean ODS/pilot (see Cleaning
and Maintenance, Page 16) 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 propane/
LP gas company
2. Clean burner (see Cleaning and
Maintenance, Page 16) or replace
burner orifi ce(s)
3. Reconnect leads see wiring diagram,
Page 18
4. Put remote selector in ON posi-
tion
5. See Wiring Diagram, Page 18
1. Contact local natural or propane/
LP gas company
2. Clean burner (see Cleaning and
Maintenance, Page 16) or replace
burner orifi ce(s)
3. Contact qualifi ed service person
1. Clean burner (see Cleaning and
Maintenance, Page 16) or replace
burner orifi ce
2. Replace damaged burner
3. Replace gas regulator
900465-01A