1403BSHH_AMEN,page 27/29
Flowchart
The integrated control relay monitors the operation of the heater. If the heater fails to operate properly, review the flow chart below and see the operating sequence in
section 9.
The general troubleshooting chart on the following pages will also help you to determine the problem.
Trial for
Ignition
Call for Heat
Is the re a
spark acr oss gap at
igniter?
Does gas ignite?
Is the re minimum
flame current at the flame
sensor?
Is there
minimum flame current
at the control
module?
Re place c ontrol
module.
Check connections to flame
sensor and/or moisture in
the burner asse mbly.
Is the flame
sensor corroded?
Clean flame
sensor with emery
cloth or stee l wool.
Is the sensor
located in flame ?
Re place
flame
sensor.
Re position flame sensor.
Is gas
flowing ?
Is the
igniter position
corre ct in the gas
flow?
Check gas pressure
and supply voltage .
If eithe r are low,
correct and repeat
startup.
Reposition
spark ignite r.
Is the re
line voltage to the gas
valve?
Is there line
voltage from valve output on
control module to
chassis?
Check wiring and
connections to gas
valve.
Re place
ignition
control
module.
Replace gas
valve.
Is there
line voltage at spar k
igniter?
Check connection
at spark igniter.
_______________
Replace ignite r
Is there line voltage to
the control relay?
Re place
control
relay
Check wiring
connections
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
NO
YES
YES
NO
YES
NO
YES
NO
Is the
he ate r grounded
(earthed)?
NO
Connect ground wire (e arth)
to unit chassis.
YES
Is burner
jet opening
correct size for
gas used? (check
rating label on
heater)
Air in the
gas line?
NO
YES
Bleed air from
gas line.
Change injector
(correct size shown on
heater rating label)
NO
Yes