TROUBLESHOOTING

STANDING PILOT - MILLIVOLT

 

SYMPTOM

 

POSSIBLE CAUSE

REMEDY

1.

Spark ignitor will

A.

Wire disconnected.

Open door and check to make sure wire is connected to

 

not light pilot after

 

 

ignitor.

 

repeated triggering

 

 

 

 

of piezo.

 

 

 

 

 

B.

Defective ignitor.

Check for spark at electrode and pilot. If no spark and

 

 

 

 

electrode wire is properly connected, replace pilot assembly.

 

 

C.

No gas or low gas

Check remote/manual shut off valve from fireplace. Low

 

 

 

pressure.

pressure can be caused by bent lines, restricted lines, low

 

 

 

 

pressure line pressure. Consult with plumber or gas

 

 

 

 

supplier.

 

 

D.

No Propane/LPG in

Check Propane/LPG tank. Refill tank

 

 

 

tank

 

2. Pilot will not stay

A.

Defective Valve

If thermopile is producing more than 325 mV, replace faulty

 

lit after carefully

 

 

valve.

 

following lighting

 

 

 

 

instructions.

 

 

 

3.

Pilot burning, valve

A.

Defective switch,

Check switch and wire for proper connection. Place jumper

 

knob turned to

 

wall switch, remote

wires across terminals of switch. If burner comes on,

 

“ON”, switch is

 

control or wire

replace defective switch. If the switch is OK, repeat the

 

turned to “ON” or

 

 

same procedure on remote control. If burner comes on,

 

“RS”, but burner

 

 

replace remote control.

 

will not ignite.

 

 

Place jumper wire across wire at gas valves (terminals

 

 

 

 

 

 

 

 

marked TH and TP/TH). If burner comes on, wires are

 

 

 

 

faulty or connections are bad. Replace wire.

 

 

B.

Pilot flame too small

If pilot flame is not close enough to the thermopile, adjust

 

 

 

 

pilot flame.

 

 

C.

Defective or

Check thermopile wire connections to make sure all are

 

 

 

malfunctioning

tight and that the thermopile is fully inserted into pilot

 

 

 

thermopile

assembly.

 

 

 

 

Check thermopile with a millivolt meter. Connect leads to

 

 

 

 

TP and TP/TH terminals on the control valve. If meter

 

 

 

 

reading is below 325 mV, replace pilot assembly

 

 

D.

Defective valve

Turn valve knob to “On” and switch to “ON”. Take a

 

 

 

 

reading at the thermopile leads (TP & TP/TH) on the valve.

 

 

 

 

If the meter reads greater than 100 mV and the burner does

 

 

 

 

not light, replace defective valve

4.

Frequent pilot

A.

Pilot flame may be

Clean and adjust the pilot flame for maximum flame

 

outage problem.

 

too high or too low,

impingement on thermopile.

 

 

 

causing pilot safety to

 

 

 

 

drop out

 

 

 

 

 

 

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Image 33
Monessen Hearth 7000 Series operating instructions