Groen TDH, Operator'S Manual

Page: 19 / 36

19
OM-TDH
OM-TDH
SYMPTOM WHO WHAT TO CHECK
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indicates items which must be performed by an authorized technician.
19
Spark is present but the pilot
will not light.
Auth
Service
Rep Only
a. That the pilot valve is securely connected to terminals.
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b. For 24 VAC at terminals PV and PV/MV. If 24V is not present,
replace the ignition control module.
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b. That gas pressure is at least 3.5" W.C.(8.7818
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b).
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c. For gas at the pilot. If it is not flowing:
(1) Check the pilot gas line for kinks and obstructions.
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(2) Clean orifice, if necessary.
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(3) Check magnetic operator for pilot valve on gas valve. Repair
or replace as necessary.
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d. That the pilot spark gap is located in the pilot gas stream. If not,
adjust or replace the pilot burner.
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e. For drafts. Shield the pilot burner, if necessary.
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Pilot lights, but main burner
will not come on and spark
does not stay on.
Auth
Service
Rep Only
a. For 24 V between terminals PV and PV/MV. If 24V is not present,
replace the ignition control module.
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b. That gas pressure is at least 3.5" W.C.(8.7818
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b).
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c. Electrical connections of the main valve to terminals, to assure that
they are securely attached. Check magnetic operator for pilot valve
on gas valve. Repair or replace as necessary.
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Pilot lights, but main burner
will not come on, the spark
stays on.
Auth
Service
Rep Only
a. Check for bad burner ground. If necessary, repair with high
temperature wire.
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b. Pilot burner ceramic insulator for cracks.
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c. That cable is not grounded out. If it is, correct the ground-out
condition or replace cable.
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d. For proper gas pressure.
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e. Clean pilot assembly, or replace if necessary.
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f. Tighten all mechanical and electrical connections.
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g. If the pilot flame is weak, increase pilot orifice size.
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h. Replace ignition control module.
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Main burner comes on but
will not stay on.
Auth
Service
Rep Only
a. Check burner ground for bad wire or connection. Replace if
necessary with high temperature wire.
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b. Check for low gas supply pressure. If necessary, replace ignition
control module.
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