Trouble shooting
16
Fault
Possible Cause
Remedy
Pilot won’t light.
No gas supply or gas isolation
valve is OFF.
Ensure gas isolation valve is turned on, and
that gas tanks are not empty.
Pilot injector is clogged or partially
blocked.
Check the pilot injector if clogged or
partially blocked, and clean if necessary.
Follow the pilot injector removal procedure.
Pilot tube is kinked and gas cannot
pass through.
Check if the pilot tube is kinked. Remove
the kink and check for possible gas leak. If
gas leak is found, turn off the main gas
valve and replace the pilot tube.
Pilot goes out when
gas control knob
released.
Releasing the knob before
the thermocouple has
heated.
Hold the knob in for at least 10~20
seconds following ignition of the pilot.
Gas pressure too low.
Check the pressure of the main line if within
standard. Adjust the pressure if necessary.
NG – 1.0KPa and LPG – 2.75KPa.
Partially blocked pilot injector.
Clean the pilot injector or replace the pilot
injector if necessary. Follow the pilot
injector removal procedure.
Thermocouple connection to the
combination valve is loose.
Tighten the thermocouple
connection.
Faulty thermocouple.
Check if the thermocouple is producing
20~30 millivolts. Otherwise, replace the
FDS. Follow the FDS removal procedure.
Faulty combination valve.
Replace the combination valve. Follow the
combination valve removal procedure.
Main burner won’t
light
Burner injector is clogged or
partially blocked.
Check the burner injector if clogged or
partially blocked, and clean if necessary.
Follow the burner injector removal
procedure.
Faulty combination valve.
Replace the combination valve. Follow the
combination valve removal procedure.
Main burner flame
color is yellow or
orange.
Insufficient air supply.
Check if there is anything blocking the air
passages of the fryer.
Wrong type of gas used.
Check the name plate and injector’s orifice
# used and compare with gas used on the
unit.
Partially block orifice or dirty
orifice.
Clean the orifice. Follow the orifice removal
procedure.
Blowing or lifting of
flames
Too much primary air.
Check the primary air and reduce if
necessary. When reducing primary air, make
sure yellow tipping does not occur.
Appliance input rate is lower
than the supply input rate.
Check the appliance input rate and reduce if
necessary.
The orifice size of the burner not
the same as the other burners
and it is operating above the
rated input rate.
Check the orifice size of that burner against
the others to make sure the burner is not
operating over the rated input.
