Vermont Castings Radiance RADVT Series Installation & Operating Manual page 36

M. Troubleshooting
- (Continued)
Symptom
Pilot sparks for 60 sec, but will not light, 3
Red/1 Green Lockout.
Pilot lights but main burner does not light.
Pilot continues to spark for 60 sec then
goes into 3 Red/1 Green Lockout.
Pilot lights and rectifies, but main
burner does not light.
Pilot and main do not light, ECM goes into
5 Red/1 Green Lockout.
Appliance lights and runs for a few minutes
then shuts down and/or appliance cycle
ON and OFF with less than 60 sec of ON
time.
3636
Possible Cause
No gas supply
ECM has poor ground.
Gas valve defective.
No flame detected. Flame
rectification issue.
No flame detected or sense
rod contamination.
Main valve solenoid.
Power Vent (PV) Failure.
Shorted or loose connection
in flame detection circuit.
Poor flame rectification or
contaminated sense rod.
Logs are set up wrong.
Damaged pilot assembly.
Vermont Castings • Radiance RADVT Installation Manual_R4 • 04/19
Corrective Action
Verify incoming gas line ball valve is 'Open'. Verify inlet
pressure is within requirement for gas type used. Contact
gas supplier.
Verify wiring, check valve harness black wire is securely
grounded to metal chassis.
Check pilot valve solenoid kick and hold voltages during
ignition cycle. Kick V should be >1 V, hold V minimum 0.26
V. If voltages are OK, replace gas valve.
Check if white sense lead is securely connected to 'S'
terminal of IFT-ECM. Check resistance of sense lead
between sense rod tip and connector to IFT-ECM, should
be less than 1 ohm - if not, replace pilot assembly. Check
system ground, ensure black valve harness wire is securely
attached to metal chassis. Check wiring for damage. With
system OFF, check resistance between tip of sense rod
and pilot hood, should be resistance (>1 M-ohm).
With glass assembly installed, verify pilot flame is engulfing
flame sense rod on pilot assembly. Verify inlet gas pressure
is correct for gas type. Polish flame sense rod with fine
steel wool to remove any contaminants that may have
accumulated.
Check if green wire in valve harness is connected to green
main valve solenoid. Check main valve solenoid resistance,
nominal is 60 ohms. If open or shorted, replace valve.
Verify valve inlet pressure is correct for gas type.
Power Vent blower defective - check wiring to IFT-ACM,
check if blower is working. Check if PV pressure switch
is connected to brown and black wire in 6-pin valve wire
harness. Check if pressure switch is closed (shorted)
when PV blower is running. Refer to PV troubleshooting
instructions.
Check if white sense lead is securely connected to 'S'
terminal of IFT-ECM. Check resistance of sense lead
between sense rod tip and connector to IFT-ECM, should
be less than 1 ohm - if not, replace pilot assembly. Check
system ground, ensure black valve harness wire is securely
attached to metal chassis. Check wiring for damage. With
system OFF, check resistance between tip of sense rod
and pilot hood, should be resistance (>1 M-ohm).
With glass assembly installed, verify pilot flame is engulfing
flame sense rod on pilot assembly. Verify inlet gas pressure
is correct for gas type. Polish flame sense rod with fine
steel wool to remove any contaminants that may have
accumulated. Verify no soot deposits are in sense rod to
pilot hood gap.
Remove and re-install logs per the log placement
instructions.
Verify the pilot assembly ceramic insulator around the
flame sensing rod is not cracked, damaged or loose.
Check resistance between tip of sense rod and IFT-ECM
connector, should be less than 1 ohm. Replace pilot
assembly if damage is detected.
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