Specifications

MAINTENANCE VTG-IOM-2012-1001 SECTION 4

4-8

TROUBLESHOOTING

PROBLEM CAUSE CHECK

Control does not illuminate Power supply Check fuse or circuit breaker. Reset or replace as

necessary.

Fan will not start High temperature is tripped 1. Reset switch

2. Replace switch

Low gas is tripped 1. Reset switch

2. Replace switch

High gas is tripped 1. Reset switch

2. Replace switch

UT32A incorrectly set/no heat Adjust UT32A

Flame detector has detected light/scanner 1. Identify light source, remove

2. Replace  ame detector

Air switch is made when fan is not on 1. Reset switch

2. Replace switch

Blower contactor made when fan not on Replace motor contactor

Gas valve proof of closure defective Replace valve

Loose wire connection Check wiring

Pilot Fails Insu cient gas supply 1. Verify the manuals shut o valves are open

allowing gas  ow to the pilot tube.

2. Adjust incoming gas pressure to match the start

up report.

3. Adjust pilot gas pressure regulator to match the

start up report.

Pilot valve fails to open 1. Check pilot gas pressure at the burner.

2. Verify operation of the valve. If pressure does

not increase when the valve is supposed to open,

replace valve.

Air in pilot gas line Have the boiler attempt to light up to three times. If

the boiler fails to light, call Fulton.

Ignitor failure 1. Check the gap between the top of the electrode

and the pilot tube wall. The gap should be 1/16”.

Adjust the gap.

1. Check for cracked porcelain. Replace electrode.

Combustion air not su cient 1. Verify the over burner pressure matches the start

up report. Adjust the servo setting.

2. Verify there is enough make up air in the room.

3. (For direct vent only) Verify venting is not

obstructed.

Flame Detector Defective 1. Visually verify the  ame through the site glass.

2. Remove  ame detector and visually verify  ame

through the scanner tube.

3. Verify the  ame detector eye is not dirty.

4. Replace  ame detector.

Gas  lter blocked Replace gas  lter.