Owner's Manual

25
Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Owner’s Manual • 9/20
IntelliFire Touch Ignition System - (continued)
Symptom Possible Cause Corrective Action
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90 sec, 3 Red/1 Green Lockout.
No gas supply.
Verify incoming gas line ball valve is ‘Open’. Verify inlet pres-
sure is within requirement for gas type used. Contact gas sup-
plier.
ECM 2.0 has poor ground.
Verify wiring, check valve harness black wire is securely
grounded to metal chassis.
Gas valve defective.
Check pilot valve solenoid kick and hold voltages during igni-
tion cycle. Kick V should be >1 V, hold V minimum 0.26 V. If
voltages are OK, replace gas valve.
Pilot lights but main burner does
not light. Pilot continues to spark
for 90 sec then goes into 3 Red/1
Green Lockout.
Check if white sense lead is securely connected to ‘S’ termi-
nal of
IFT-ECM 2.0. Check resistance of sense lead between
sense rod tip and connector to
IFT-ECM 2.0, 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).
rod contamination.
wool to remove any contaminants that may have accumulated.
burner does not light.
Main valve solenoid.
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.
Pilot and main do not light, ECM
2.0 goes into 5 Red/1 Green
Lockout.
Power Vent (PV) Failure.
Power Vent blower defective - check wiring to
IFT-PACM 2.0,
check if blower is working. Check if PV pressure switch is con-
nected 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.
Appliance lights and runs for a few
minutes then shuts down and/or
appliance cycle ON and OFF with
less than 90 sec of ON time.
Shorted or loose connection in
Check if white sense lead is securely connected to ‘S’ termi-
nal of
IFT-ECM 2.0. Check resistance of sense lead between
sense rod tip and connector to
IFT-ECM 2.0, 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).
contaminated sense rod.
wool to remove any contaminants that may have accumulated.
Verify no soot deposits are in sense rod to pilot hood gap.
Logs are set up wrong. Remove and re-install logs per the log placement instructions.
Damaged pilot assembly.
sensing rod is not cracked, damaged or loose. Check resis-
tance between tip of sense rod and
IFT-ECM 2.0 connector,
should be less than 1 ohm. Replace pilot assembly if damage
is detected.
Troubleshooting (continued)