Troubleshooting; Intellifire® Plus With Ods Ignition System - Monessen Hearth Mojo Series Installation & Owner's Manual

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Troubleshooting

Turn appliance OFF and allow to cool before servicing. Only a qualified service person should service and
repair the heater.
With proper installation, operation, and maintenance your gas appliance will provide years of trouble-free service. If you do
experience a problem, this troubleshooting guide will assist a qualified service technician in the diagnosis of a problem and
the corrective action to be taken. This troubleshooting guide can only be used by a qualified service technician. Contact
your dealer to arrange a service call by a qualified service technician.
A. IntelliFire® Plus with ODS Ignition System
Symptom
1. Pilot won't light. A. Incorrect wiring.
The ignitor/module
makes noise, but no
B. Loose connections or electrical
spark.
C. Ignitor gap is too large.
2. Pilot won't light, A. Depleted batteries or batteries
there is no noise or
spark.
B. A shorted or loose connection in
C. Improper wall switch wiring.
D. Module not grounded.
3. Pilot sparks, but A. Gas supply is off or lacking pres-
pilot will not light.
B. Ignitor gap is too large.
C. Module is not grounded.
D. Pilot valve solenoid voltage is out
4. Shortened battery A. Thermopile wires hooked up back-
life
B. Using flame adjustment feature
Possible Cause
shorts in the wiring.
installed incorrectly.
wiring configuration or wiring har-
ness.
sure.
of spec.
wards
frequently on the RC300
Monessen • Mojo Installation/Owner's Manual • 4623-900 Rev. D • 04/21
WARNING
Verify "S" wire (white) for sensor and "I" wire (orange) for ignitor are
connected to correct terminals on module and pilot assembly.
Verify no loose connections or electrical shorts in wiring from mod-
ule to pilot assembly. Verify connections underneath pilot assembly
are tight; also verify igniter and flame sense wires are not grounding
out to metal chassis, pilot burner, pilot enclosure, mesh screen if
present, or any other metal object.
Verify gap of ignitor to thermocouple (natural gas models) or ignitor
to pilot barrel (propane models). The gap should be approximately
.095 in. (2.41 mm) to .135 in. (3.43 mm).
Battery power supply voltage must be at least 4.9 volts. If less than
4.9 volts, replace batteries.
Remove and reinstall the wiring harness that plugs into module.
Verify there is a tight fit. Verify pilot assembly wiring to module. Re-
move and verify continuity of each wire in wiring harness. Replace
any damaged components.
Verify that 110-120 VAC power is "ON" to junction box.
Verify black ground wire from module wire harness is grounded to
metal chassis of appliance.
Verify that incoming gas line ball valve is "open." Verify that inlet
pressure reading is within acceptable limits.
Verify gap of ignitor to thermocouple (natural gas models) or ignitor
to pilot barrel (propane models). The gap should be approximately
.095 in. (2.41 mm) to .135 in. (3.43 mm).
Verify module is securely grounded to metal chassis of appliance.
Verify that 1.5 to 1.8 VDC is supplied to pilot solenoid from module.
If below 1.5 volts, replace module. If 1.5 volts or greater, replace
valve.
Verify white and red wires from thermopile are in correct location on
control module.
Battery life will be shortened if the flame adjustment feature is used
frequently on the RC300 remote control. Reduce the number of
times flame height is adjusted to increase battery life.
Corrective Action
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