– 14 –
Symptom
Cause
Remedy
1.
Slowly
open valve.
2. Increase gas pressure.
3. Clear obstruction in vent ori
fi
ce/
line or replace if defective.
4. Check for correct installation and
voltage. Correct or replace.
5. Replace with factory required
type of gas.
6. Flame Rod - assure rod is in
fl
ame, check wiring and
fl
ame
rod.
7. Check wiring or replace ignition
control.
8. Check for power, replace if
necessary.
1. See Digital Control System User
manual.
2. Refer to following troubleshooting
guide for RTC controls.
1. Check and/or replace. See
section on troubleshooting PT-15.
2. Check wiring.
3. Install correctly. See section on
air
fl
ow station layout.
4. Check and/or replace
components. See section on
trouble shooting PT-13.
5. Check wiring.
6. Install correctly. See section
on trouble shooting PT-13 and
manufacturer’s cut sheet.
7. Check and/or replace. Contact
Factory.
8. Check wiring.
9. Check and/or replace.
10. Check and repair.
1. Manual shut-off valve closed.
2. Inlet gas pressure lower than
required gas pressure
3. No gas through main gas regulator
with inlet gas pressure ok.
4. No gas through main gas
solenoids.
5. Type of gas (natural - LP)
supplied different from factory
required type. Note: components
may change.
6. Flame detection system not
sparking or sensing
fl
ame.
(see spark rod diagram #P-001117)
7. No voltage output terminals of
ignition control.
8. Main gas valve relay open.
1. For DDC System.
2. For RTC RE-26.
1. Defective or misadjusted
transducer (PT-15).
2. Transducer (PT-15) wired
incorrectly.
3. Transducer (PT-15) tubing not
installed correctly.
4. Building Pressure Transducer
(PT-13), Damper Control
Potentiometer defective or not
calibrated.
5. Building Pressure Transducer
(PT-13), Damper Control
Potentiometer not wired correctly.
6. Building Pressure Transducer
(PT-13), Damper Control
Potentiometer not installed
correctly.
7. Unit Control Module (UC-01)
defective.
8. Unit Control Module (UC-01) not
wired correctly.
9. Damper motor defective.
10. Dampers binding and/or loose.
SECTION VII - TROUBLESHOOTING
continued
D. If burner does not light
after prepurge has
timed out (5 seconds)
and voltage is present
on ignition control input
terminals.
E. Burner will not respond
to temperature.
F. Mixing Box with Air
fl
ow
Station dampers not
functioning properly. See
Sequence of Operation
for damper control.
Heat Mode
continued
(Refer to Digital Control System User Manual for additional troubleshooting suggestions)
