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SERVICE
TROUBLESHOOTING THE GAS CONTROL SYSTEM
Note:
Before troubleshooting the gas control system, be sure external gas shut off is in the "on" position.
WARNING: BEFORE DOING ANY GAS CONTROL SERVICE WORK, REMOVE THE GLASS FRONT.
PROBLEM
Spark igniter will not
Piezo wire loose
light pilot.
Defective Piezo igniter.
Piezo wire grounding out.
Electrode is grounding out
and/or wrong location.
Pilot will not stay lit
Defective thermopile.
after carefully fol-
Defective thermocouple.
lowing lighting in-
Thermopile/thermocouple
structions.
grounding out.
Loose thermopile leads.
TP-THTP on valve.
Defective automatic gas
valve.
Pilot burning, no
Valve wire connections are
gas to burner.
loose.
Valve knob is on.
Valve wires are defective.
Wall switch is on.
Spill switch has not been re-
set (B-vent F/S).
Spill switch is stuck in the
open position. (B-vent INS
- F/S).
Frequent pilot out-
Pilot flame may be too low
age problems.
or blowing high causing the
pilot safety to drop out.
Two way switch wires may
be grounding out.
Thermopile and/or thermo-
couple may be grounding
out.
Note: For service technicians only . See the Masport Troubleshooting Guide for more detailed information.
(Troubleshooting Masport Gas Products - Part # 908-439.)
ABNORMAL OPERATION
aava
If the main burner does not light but pilot stays on shut down heater and contact your dealer
If excessive carbon on logs or glass contact your dealer
22
TROUBLESHOOTING GUIDE
POSSIBLE
CAUSES
• Check for spark at electrode and pilot. If no spark, disconnect wire
• Bend electrode into pilot so gas may be able to contact spark.
• Check pilot flame, must impinge on thermopile and thermocouple.
• Clean and/or adjust pilot so pilot is enveloped around thermopile
• Be sure wire connections at gas valve terminals are tight and ther-
• One of the switch wires may be grounded. May be grounded to
• Check thermopile with millivolt meter. Take reading at thermopile
• Replace if lower than specified minimum.
• Turn valve knob to on including pilot. Take reading at TP-TPTH
• Check two way switch/wall switch for proper connections. Jumper
• If okay, jumper wire at valve at TH-THTP. If unit turns on, replace
• Clean and/or adjust pilot for maximum flame impingement on
• Trace wires from valve to two way switch/wall switch for possible
• Trace thermopile wires from valve to thermopile for possible
• Follow same steps for thermocouple.
CORRECTIVE ACTION
at electrode and put wire to ground and try igniter again. If still no
spark follow Piezo wire to Piezo igniter to see where grounding
may be occurring.
and thermocouple and correct millivolt reading is set.
mopile and thermocouple are fully inserted into pilot bracket.
gas appliance or gas supply.
terminals of valve TP-TPTH. Should read 250 millivolts minimum
while holding valve knob in pilot position with pilot on and wall
switch/two way switch off.
with on/off switch in the on position. Reading should be 100mv or
greater. If reading is okay and pilot does not hold, replace gas valve.
wire across terminals at two way switch/wall switch. If burner comes
on, replace switch.
wires and/or check where loose wires are.
thermopile and/or thermocouple and correct millivolt reading is
set.
grounding against gas appliance and/or gas supply.
grounding against gas appliance and/or gas valve.
Masport I43 NEW YORK / ULTIMATE Gas Inbuilt Fireplace
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