COZY W255GPPR Instructions D'installation Et D'utilisation page 31

TROUBLESHOOTING CHART ( FOR QUALIFIED SERVICE TECHNICIAN )
SYMPTOM POSSIBLE CAUSES
Failure to 1. Main gas off.
Ignite
2. Defective gas valve.
3. Defective pilot assembly.
4. Battery is low.
5. Control module is defective.
6. Manual reset blocked
flue switch tripped.
7. Tubing hasn't filled with
enough gas to light the pilot.
(This issue can occur if the furnace
has not been used recently).
Condensation 1. Improper venting.
of Water Vapor
Burner Won't 1. Defective or the automatic valve
is sticking.
Turn Off
2. Excessive gas pressure
3. Control module is defective
1. Gas input not checked.
Incorrect
Gas Input
2. Clogged orifice.
1. Appliance undersized.
Not
Enough
Heat
2. Temperature dial set too low.
(Bulb type valves).
3. Incorrect supply pressure.
Too Much 1. Temperature dial set too high.
Heat
2. Combination control
valve sticks open.
Burner 1. Pilot flame too large or too small.
Won't Turn
2. Dirt in pilot orifice.
On
3. Defective automatic pilot section in
combination control valve.
4. Defective pilot generator.
5. Defective combination control valve.
6. Manual reset blocked flue switch
tripped.
MAIN BURNER
Please follow the following corrective actions in order.
1. Open all manual gas valves.
2. Replace gas valve.
3. Inspect pilot assembly for loose or broken components or wires. Replace. Refer to parts list.
4. Turn thermostat off and replace batteries.
5. Replace the control module. Refer to the parts list.
6. Reset switch, see Page 7.
7. Refill the line with gas. Initial startup of the Pilot Pro system may take several minutes due
to air in the gas line. The ignition control module will time out after 1 minute of sparking.
See step 2 on page 20.
1. See "Venting" on page 7.
1. Clean or replace valve.
2. To correct this situation contact the utility supplying the gas.
See page 5 for gas pressure.
3. Replace the control module. Refer to the parts list.
1. Re-check 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 information. If appliance is undersized, replace with correct size unit.
2. Raise setting of Temperature Dial.
See "Lighting & Shutting Down Instructions" on page 23.
3. See page 5 for gas pressure.
1. Lower setting of temperature dial.
See "Lighting & Shutting Down Instructions" on page 23.
2. Replace combination control valve.
1. Check or clean the pilot orifice. See page 5 for gas pressure.
2. Clean pilot orifice with air or solvent, do not ream.
3. Replace entire combination control valve.
4. Replace pilot generator.
5. Replace valve.
6. Reset switch, see Page 8 (Fig. 4-A).
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CORRECTIVE ACTION
1018454-E