Groen AHS-40, Operator'S Manual

Page: 15 / 23

OM-AHS
SYMPTOM WHO WHAT TO CHECK
indicates items which must be performed by an authorized technician.
15
Pressure relief valve pops open User a. For air in the jacket. See “Jacket Vacuum” in the Maintenance section.
b. Thermostat dial setting.
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c. For defective thermostat. The thermostat should click when the dial is
rotated to settings above and below the temperature of the kettle. If
defective, replace.
d. For defective pressure relief valve. If the valve pops at pressures below
29 PSI, replace.
Burners will not light. User a. That the main gas supply valve is open. (handle is in line with the gas
pipe).
b. Gas supply to the building.
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d. Thermostat operation. The thermostat should click when the dial is
rotated to settings above and below the temperature of the kettle.
System does not produce a spark Auth
Service
Rep Only
a. AC voltage between terminals on secondary side of transformer with
unit power turned on. If it is not 24 Volt, replace the transformer
b. That the high tension cable is firmly attached and in good condition. If
cracked or brittle, replace.
c. Pilot burner ceramic insulatorfor crack or break.
d. Pilot spark gap. Regap.
Spark is present but the pilot will
not light.
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a. That the pilot valve is securely connected to terminals.
b. For 24 VAC at terminals PV and PV/MV. If 24V is not present, replace
the ignition control module.
b. That gas pressure is at least 3.5" W.C.(8.7818 b).
c. For gas at the pilot. If it is not flowing:
(1) Check the pilot gas line for kinks and obstructions.
(2) Clean orifice, if necessary.
(3) Check magnetic operator for pilot valve on gas valve. Repair or
replace as necessary.
d. That the pilot spark gap is located in the pilot gas stream. If not, adjust
or replace the pilot burner.
e. For drafts. Shield the pilot burner, if necessary.
Pilot lights, but main burner will
not come on and spark does not
stay on.
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Service
Rep Only
a. For 24 V between terminals MV and PV/MV while pilot is burning. If
24V is not present, replace the ignition control module.
b. That gas pressure is at least 3.5" W.C.(8.7818 b).
c. Electrical connections of the main valve to terminals, to assure that they
are securely attached. Check magnetic operator for main valve on gas
valve. Repair or replace as necessary.
Pilot lights, but main burner will
not come on, the spark stays on.
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a. Check for bad burner ground. If necessary, repair with high
temperature wire.
b. Pilot burner ceramic insulator for cracks.
c. That cable is not grounded out. If it is, correct the ground-out condition
or replace cable.
d. For proper gas pressure.
e. Clean pilot assembly, or replace if necessary.
f. Tighten all mechanical and electrical connections.
g. If the pilot flame is weak, increase pilot orifice size.
h. Replace ignition control module.
Main burner comes on but will not
stay on.
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a. Check burner ground for bad wire or connection. Replace if necessary
with high temperature wire.
b. Check for low gas supply pressure. If necessary, replace ignition
control module.
Pressure relief valve leaks a small
amount of steam when the kettle
is operating.
User a. For contamination that prevents seating of valve. With full pressure in
the jacket, pull the lever all the way briefly to blow the valve clean, then
let the lever snap back to seat the valve.
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b. Pressure relief valve for defects. Replace any defective valve with an
identical valve.