Service; Troubleshooting The Gas Control System - Masport F33-NG1 Owners & Installation Manual

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 follow- Defective thermocouple.
ing lighting instruc- Thermopile/thermocouple
tions. grounding out.
Loose thermopile leads.
TP-THTP on valve.
Defective automatic gas
valve.
Pilot burning, no gas Valve wire connections are
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 outage Pilot flame may be too low
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)
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
Masport F33-1 Freestanding Gas Stove
TROUBLESHOOTING GUIDE
POSSIBLE
CAUSES
• Check for spark at electrode and pilot. If no spark, disconnect wire at
• 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 and
• Be sure wire connections at gas valve terminals are tight and ther-
• One of the switch wires may be grounded. May be grounded to gas
• Check thermopile with millivolt meter. Take reading at thermopile ter-
• Replace if lower than specified minimum.
• Turn valve knob to on including pilot. Take reading at TP-TPTH with
• 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
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.
thermocouple.
mopile and thermocouple are fully inserted into pilot bracket.
appliance or gas supply.
minals 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.
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.
grounding against gas appliance and/or gas supply.
grounding against gas appliance and/or gas valve.

SERVICE

19