Technical data

0803UDSA-2GBEN, Pag. 34/36
YES
YES
YES NO
YES
NO YE S NO
YES
NO
YES
NO
Trial for ignition
Call for heat
Is there a
spark across
gap at igniter?
Does gas
ignite?
Is there min.
flame current at
the flam e
sensor?
Is there min.
flame current at
the control
module?
Check connections to flame
sensor and/or moisture in
the burner assembly
Replace control module
Is the flame
sensor
corroded?
Clean flame sensor
with emery cloth or steel
wool
Is the sensor
located in flame?
Reposition flame
sensor
Is the heater
grounded
(earthed)?
Replace flame sensor
Connect ground wire (earth)
to unit chassis
YES
NO
NO YES
NO
YES NO YES
NO
YES
YES
YES
NO
NO
Trial for ignition
Call for heat
I
s there a
spark across
gap at igniter?
Does gas
ignite?
Is gas flowing?
Is there line
voltage to the gas
valve ?
Replace gas valve
Is burner jet opening
correct size for gas
used
(check rating label
on heater)
Change injector (correct
size shown on heater
rating label)
Air in the gas line
Bleed air from gas
line
Is the igniter
position correct
in the gas flow?
Check gas pressure & supply
voltage. If either are low, correct and
repeat startup
Reposition spark igniter
Is there line
voltage from
valve output on
control module
to chassis?
Replace ignition
control module
Check wiring &
connection to gas valve