Service manual

35
Service Manual for Flexible Batch Broiler Units
YESYESNO
No Gas. Ensure
incoming gas supply is
available.
Faulty igniter or
insufficient spark gap.
Ensure upper igniters
have sufficient spark
gaps and spark is not
arcing elswehere.
Faulty Controller.
Ensure Controller
signals for heat to the
upper ignition module.
Is there spark
present at both
the upper
igniters?
Is there spark
present at both
the upper igniters,
but no ignition?
YES
Is there spark and
ignition on both upper
burners, but burner(s)
do not stay lit?
NO
NO
NO
Faulty ignition cable.
Ensure continuity
through affected ignition
cable.
Dirty Flame Sensor. Clean
the affected upper flame
sensor.
Faulty ignition
module. Ensure upper
ignition module signals
to open lower gas
valve.
YES
Faulty gas valve.
Ensure gas valve
solenoid energizes and
gas is present at the
upper burners.
Consult next
page
YES
Faulty Controller. Ensure
Controller signals blower
motor relay to close.
Faulty blower motor or
relay. Ensure blower motor
energizes and there is
sufficient air traveling to the
upper burners. Heavy
accumulation of grease on
the blower wheel can have
adverse effects.
Grounding Flame Sensor.
Ensure Sensor rod is not
coming in contact with any
metal surface or ceramic tile
of burner.
Wire connection. Ensure
flame sense wire
connections are tight.
Determine flame sensor
failure. Check microamp
reading from upper ignition
module from each sensor
while burners are on. If flame
sense failure occurring, the
affected sensor should fall
below 0.7 microcamps.
Dirty orifice. Ensure
upper burner orifices
are free of debris.
Upon reaching 500 F,
do the upper infrared
burners ignite and
stay lit?