Osburn Cordova Series Installation And Operating Instructions Manual page 33

SYMPTOM
II Pilot will not stay lit
after following the
lighting instructions
(continued)
f i r e - p a r t s . c o m
III. Main burner will not
light
SYMPTOM
POSSIBLE CAUSE
Thermocouple/valve (continued)
5. Defective valve
B. Defective safety circuit
1. Improperly wired
2. Loose or defective connections
3. Defective electromagnet power unit (EPU)
4. Defective spill switch
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
9. Defective valve
POSSIBLE CAUSE
5. 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
metre 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
4. Check continuity & replace if
defective
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
uired
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
CORRECTIVE ACTION
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