Troubleshooting Charts - COZY 90N30A Installation And Operating Instructions Manual

SYMPTOM
lncorrect 1. Gas input not checked.
Gas Input
2. Clogged orifice.
Not Enough 1. Appliance undersized
Heat
2. Thermostat set too low.
3. lncorrect supply pressure.
1. Thermostat set too high.
Too Much
Heat
2. Combination control valve sticks open.
SYMPTOM
1. Pilot flame too large or too small.
Burner Won't
Tum On
2. Dirt in pilot orifice.
3. Defective automatic pilot section
in combination control valve.
4. Defective Thermocouple.
TROUBLESHOOTING CHART - ( Main Burner )
FOR QUALIFIED SERVICE TECHNICIAN
POSSIBLE CAUSES
TROUBLESHOOTING CHART - ( Automatic Pilot & Valve )
POSSIBLE CAUSES
CORRECTIVE ACTION
1. Recheck gas input.
2. Check orifice for clogging. If clogged, clean out the hole
carefully with a smooth wood toothpick. (DO NOT in any way
enlarge or distort it).
1. This is especially true when a dwelling or room is enlarged.
Have the heat loss calculated and compare to the appliance
output (70% of input). Your gas company or installer can supply
you with this infonnation. If appliance is undersized, replace with
correct size unit.
2. Setting of thermostat.
See "Lighting and Shutting Down Instructions."
3. Check supply pressure as outlined above.
1. Lower setting of temp. dial.
See "Lighting and Shutting Down Instructions".
2. Replace combination control valve.
CORRECTIVE ACTION
1. Readjust pilot flame using adjustment screw marked "Pilot" on
combination control valve. See Page 11.
2. Clean pilot mifice with air or solvent, do not remn.
3. Replace entire combination control valve.
4. Replace thermocouple.
Page 17
Back to Index
1017826-A