Troubleshooting Guides - Dean BK1814 Service & Parts Manual

HIGH EFFICIENCY DECATHLON SERIES GAS FRYERS
1.9

Troubleshooting Guides

The following troubleshooting guides are intended to assist service technicians in quickly isolating
the probable causes of equipment malfunctions by following a logical, step-by-step process.
PROBLEM
Burner will not ignite.
Light in ON/OFF switch
is not illuminated.
ON/OFF switch is on,
but the switch light is not
illuminated.
ON/OFF switch is on and
the switch light is
illuminated, but there is
no output to gas valve.
No burner flame.
Fluctuating or erratic
lighting of burner flame.
Electronic/operating
thermostat will not adjust
to correct temperature.
CHAPTER 1: SERVICE PROCEDURES
PROBABLE CAUSES
A. ON/OFF switch is off.
A. No voltage at switch.
A. Drain microswitch circuit (filter-
equipped units) is open.
B. Voltage is present at ON/OFF switch,
but continuity of the switch in ON
position is not "0."
C. Continuity of thermostat is not "0" (oil
temperature is at least 15°F below
electronic thermostat setting).
D. Gas valve is suspect.
C. Gas valve is known to be good, but
there is not 24 VAC (120VAC on
systems so equipped) at the gas valve
terminals.
A. Incoming gas supply pressures are not
within range [Natural- 6-14" W.C.
(1.49-3.49 kPa); Propane- 11-14"
W.C. (2.74-3.49 kPa)]
B. Air in gas supply lines (new
installation).
A. Electronic/operating thermostat is out
of calibration.
CORRECTIVE ACTION
A. Turn ON/OFF switch on.
A. Ensure line voltage is present at the
switch.
A. Ensure drain valve is fully closed and
microswitch is functioning. Replace
microswitch if defective.
B. ON/OFF switch is defective. Replace
switch with a known working switch.
C. Thermostat(s) is/are defective.
Replace defective thermostat with a
known working thermostat.
D. Go to "No burner flame" section.
D. Inspect electronic sensor (while still in
frypot) for damage. Replace if bent,
dented, or cracked. Inspect leads for
fraying, burning, breaks, and/or kinks.
If found, remove and replace
thermostat(s). Remove leads from
terminal block, allow oil to cool 15°F
(8°C) below thermostat setting, and
check continuity. If continuity is not
"0," then thermostat has failed.
Replace thermostat(s).
A. Inspect gas supply to fryer. Repair
and/or replace faulty components
(defective supply shut-off valves,
incorrect piping size, etc.)
B. Allow unit to cycle on and off for
approximately 30 minutes to force air
from gas manifold and lines.
A. Calibrate electronic/operating
thermostat. Replace if calibration is
not possible.
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