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Symptom
II
Pilot will not stay lit
after following the
lighting instructions
(continued)
III. Main burner will not
light
Possible Cause
6.
Defective valve
B.
Defective safety Circuit
1.
Improperly wired
2.
Loose or defective connections
3.
Defective electromagnet power unit (EPU)
A.
Valve/Switches
1.
Valve control off
2.
Blockage at the burner (line, orifice, or ports)
3.
Defective wall switch or thermostat
4.
Defective wiring or connections
5.
Excessive length of thermostat wire from
valve to wall switch or thermostat
6.
Wall switch or thermostat incorrectly wired
7.
Defective remote control
8.
Mismatched remote control frequencies
A.
Valve/Switches (continued)
9.
Defective valve
10. Thermopile may not be generating sufficient
voltage 325 mV Robertshaw/Honeywell
Corrective Action
6.
Connect the millivolt meter probes to
the thermopile terminals on the gas
valve. Turn the valve to the "PILOT"
position, depress and light. If the
meter reading is greater than 250
millivolts after 30 seconds, the
thermopile is good. If the pilot does
not stay lit, the valve is defective.
Check section "B" below, before
replacing valve.
1.
Rewire correctly.
2.
Check continuity, tighten wiring or
connections and repair.
3.
Check and replace if required.
1.
Turn to "ON" position.
2.
Check and clean.
3.
Conduct a continuity test or jumper
wire test and replace if defective.
4.
Conduct a test with a jumper wire and
repair as required.
5.
Reduce wire length to less than 100
feet, or increase wire size.
6.
Wire correctly.
7.
Check batteries and replace if required
8.
Match frequencies
9.
Turn valve and "ON/OFF" switch to
the "ON" position. Check with
millivolt meter at terminals TP-TH.
Millivolt meter should read greater
than 100 millivolts, if the reading is
OK and the burner does not come on,
replace the gas valve.
10. Recheck using the millivolt meter. The
pilot flame may not be high enough for
the flame to properly engulf the
thermopile. If so, adjust and reset. If
voltage is still insufficient, replace
thermopile.
/34
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