TROUBLESHOOTING INSTRUCTIONS

PROBLEM

POSSIBLE CAUSE

SOLUTION

Pilot will not

Air in gas lines

Refer to Item #1 of the Set-Up Guide.

light.

Defective spill switch.

Check for continuity across spill switch leads. Replace spill switch if

 

 

excessive resistance is present or if circuit is electrically open.

 

Wrong Inlet Pressure.

Refer to Item #2 of the Set-Up Guide.

 

Defective piezo spark

Replace electrode if the insulator is cracked or the tip is corroded. Verify that

 

electrode.

the spark gap between the pilot and the electrode is correct.

 

Defective piezo wire.

Replace piezoelectric igniter if its wire insulation is damaged or the wire is

 

 

broken or corroded.

 

Safety interlock function

Allow the thermocouple to cool until the mV drops below the hold-in

 

engaged.

requirements of the safety magnet, (30 seconds or less). Re-light pilot.

Pilot will not

Wrong inlet pressure

Refer to Item #2 of the Set-Up Guide.

hold.

Pilot adjustment screw not

Refer to Item #7 in the Set-Up Guide.

 

adjusted properly.

 

 

Thermocouple or thermopile

Refer to Item #3 in the Set-Up Guide.

 

not properly inserted into

 

 

the pilot housing.

 

 

Thermocouple or thermopile

With the thermocouple and thermopile tips cool, clean the upper 3/8” with a

 

has film build-up on tip.

very fine emery cloth.

 

Electrical resistance too

Using a very fine emery cloth, clean thermopile and thermocouple

 

high.

connections at valve. Tighten thermocouple into valve hand tight, plus ¼ turn

 

 

with a wrench.

 

Defective thermocouple.

Verify that thermocouple is not kinked or damaged. Check open circuit

 

(mV Plus systems)

voltage of thermocouple. Voltage should be between 18mV and 28mv. If

 

 

voltage is less than 14mV, replace thermocouple.

 

Defective thermopile.

Refer to Item #7 in the Set-Up Guide.

 

(Millivolt system)

 

 

Defective safety magnet.

Verify operation of safety magnet in the following manner.

 

(mV Plus systems)

Depress and hold pilot button.

 

 

Verify open-circuit thermocouple voltage as described in previous step.

 

 

Reconnect thermocouple to valve.

 

 

Measure the voltage between the solder button on the base of the safety

 

 

magnet, and the valve body. If the mV reading is above 6mV for vented

 

 

appliances, or 8.5mV for un-vented appliances and the safety magnet does not

 

 

hold, replace the valve.

 

 

If closed circuit mV reading is the same as the open circuit reading, the coil is

 

 

electrically open. Replace the valve.

 

Defective Safety Magnet

Verify operation of safety magnet in the following manner.

 

(Millivolt system)

Remove all wires from the terminals of the main operator.

 

 

Measure the electrical voltage between the terminals TPTH and TP. If the

 

 

voltage is above 110mV and the safety magnet does not hold, replace the

 

 

valve.

 

Pilot orifice blocked.

Replace orifice with a new orifice of the exact size and type.

Pilot light

Wrong pilot orifice installed

Replace the orifice with a new orifice supplied specifically for the appliance

drops out.

in pilot light.

and gas type in question.

 

Spill switch activated.

Examine the venting system. Repair as necessary.

 

 

 

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