Heatilator LEGACY42-IFT Owners Manual Care And Operation page 20

Intellifire™ Touch - (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, Control
Module 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.
20
Possible Cause
No gas supply.
Control Module 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) Fault.
Shorted or loose connection in
flame detection circuit.
Poor flame rectification or
contaminated sense rod.
Logs are set up wrong.
Damaged pilot assembly.
Heatilator • Legacy42-IFT Owner's Manual • 4095-900 Rev. A • 9/17
Corrective Action
Verify incoming gas line ball valve is 'Open'. Verify inlet pres-
sure is within requirement for gas type used. Contact gas sup-
plier.
Verify wiring, check valve harness black wire is securely
grounded to metal chassis.
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.
Check if white sense lead is securely connected to 'S' terminal
of Control Module. Check resistance of sense lead between
sense rod tip and connector to Control Module, 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).
Verify pilot flame is engulfing flame sense rod on pilot assem-
bly. Verify inlet gas pressure is correct for gas type. Polish
flame sense rod with fine steel wool to remove any contami-
nants 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 fault - check wiring to AC Module, check
if blower is working. Check if Blower Control Module is con-
nected to brown and black wire in 6-pin valve wire harness.
Check if High Limit Switch is open (tripped).
Note: Some PV Faults require that the Blower Control Module
be reset before the appliance may be returned to service.
Check if white sense lead is securely connected to 'S' terminal
of Control Module. Check resistance of sense lead between
sense rod tip and connector to Control Module, 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).
Verify pilot flame is engulfing flame sense rod on pilot assem-
bly. Verify inlet gas pressure is correct for gas type. Polish
flame sense rod with fine steel wool to remove any contami-
nants 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 resis-
tance between tip of sense rod and Control Module connector,
should be less than 1 ohm. Replace pilot assembly if damage
is detected.