Fulton Endura (EDR) Condensing Hydronic Boiler - Manual (Page 58)

© The Fulton Companies 2014
MAINTENANCE
EDR-IOM-2014-0318
SECTION 4
4-6
PROBLEM CAUSE CHECK
Control does not illuminate 24 VAC Power Supply Check fuse or circuit breaker. Reset or replace as
necessary.
Fan will not start High temperature is tripped 1. Check sensor wiring connector.
2. Check resistance.
3. Replace sensor if faulty.
Low gas is tripped 1. Reset switch, making sure to listen for audible
click.
2. Replace switch if setting is below actual pressure.
High gas is tripped 1. Reset switch, makiing sure to listen for audible
click.
2. Replace switch if setting is above actual pressure.
Flame detector has detected light/scanner 1. Identify light source, remove
2. Replace fl ame detector
Air switch is made when fan is not on 1. Adjust, if necessary.
2. Reset switch
3. 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
Interrupted Air Switch Not
Made Interrupted Air Switch is annunciated if the airfl ow
switch detects low airfl ow during purge.
The air switch has been factory set and should not
be adjusted in the fi eld.
An extended low air indicaƟ on does not mean that
the low air switch is defecƟ ve.
1. Check that current seƫ ng matches factory set-
Ɵ ng.
2. Check that the burner is clean. Check the blower
purge speed and low fi re speed is correctly dis-
played on the touch screen.
3. Check for obstrucƟ ons in the air inlet path.
High Back Pressure Switch
trip/boiler shutdown Excessive Vent Pressure This condiƟ on will automaƟ cally recycle, so the
boiler will try to relight. The venƟ ng exchanger
should be checked for obstrucƟ ons and cleaned.
Check switch seƫ
ng.
Main fl ame failure during
fi ring period Main gas control valve is de-energized and the con-
trol goes into “lockout” mode. Flame failure occurs
and the indicator is illuminated. The programmer must be manually reset. Check
wire connecƟ ons.
IgniƟ on Failure If UV scanner does not detect the fl ame during the
4-second trial-for-igniƟ on period, the gas valve and
spark igniƟ on are de-energized. At this Ɵ me a safety
lockout occurs. IdenƟ fy and correct.