Improper Temperature Control; Controller Malfunctions; Filtration Malfunctions - Welbilt Frymaster FilterQuick easyTouch FQG120T Service Manual

Burners lighting on the left side only may be caused by a trailing pilot problem (four- and five-tube frypots) or improper
burner manifold pressure.
Fluctuating flame intensity is normally caused by either improper or fluctuating incoming gas pressure but may also be the
result of variations in the kitchen atmosphere. Verify incoming gas pressure in the same way as for "popping," discussed in
the preceding paragraphs. Variations in the kitchen atmosphere are usually caused by air conditioning and/or ventilation
systems starting and stopping during the day. As air conditioning/ventilation systems start and stop, the pressure in the
kitchen may change from positive or neutral to negative, or vice versa. Changes in airflow patterns may affect flame
intensity.
Flames "rolling" out of the fryer are usually an indication of negative pressure in the kitchen and make up air blowing down
the flue. Air is being sucked out of the fryer enclosure and the flames are literally following the air. If negative pressure is
not the cause, check for high burner-manifold gas pressure in accordance with the procedures in Section 1.13. An
obstructed flue, which prevents the fryer from properly exhausting, may also be the cause.
Excessively noisy burners may indicate that the burner gas pressure is too low, the tube diffusers are defective or burned
out, or it may simply be that the gas valve vent-tube is blocked (if applicable). If the gas pressure is correct, the tube
diffusers are intact and in good condition, and the vent-tube is unobstructed (if applicable), the gas valve regulator is
probably defective.
1.16.3

Improper Temperature Control

Temperature control, including the melt cycle, is a function of several interrelated components, each of which must operate
correctly. The principal component is the temperature probe. Ensure the temperature probe is parallel to the tube and
not touching the tube. Depending upon the specific configuration of the fryer, other components may include the smart
interface board, the controller itself, and the ignition module.
Improper temperature control problems can be categorized into melt cycle and failure to control at setpoint problems.
MELT CYCLE PROBLEMS
Initiation of the melt cycle with FQ4000 controllers is automatic. Problems may originate from the controller itself, the
temperature probe, float switch, or a malfunctioning heat relay on the SIB (Smart Interface Board) or the SIB (Smart
Interface Board).
FAILURE TO CONTROL AT SETPOINT
Problems in this category may be caused by the temperature probe, the SIB (Smart Interface Board), or the controller.
1.16.4

Controller Malfunctions

RECOVERY TIME
Recovery time – is a method of measuring a fryer's performance. Put simply, it is the time required for the fryer to increase
the oil temperature from 250ºF to 300ºF (121ºC to 149ºC). This range is used as a standard since ambient kitchen
temperatures can affect the test if lower ranges are used.
The FQ4000 controller performs the recovery test each time the fryer warms up. An operator can view the results of the
test any time the fryer is above the 300ºF (149ºC) point by pressing the
when the fryer is on. The test results will be displayed in minutes and seconds. The maximum acceptable recovery time
for FQG120T Series gas fryers is four minutes (4:00).
1.16.5

Filtration Malfunctions

Most filtration problems arise from operator error. One of the
most common errors is placing the filter envelope on the
bottom of the filter pan rather than over the filter screen.
Whenever the complaint is "the pump is running, but no oil is
being filtered," check the installation of the filter envelope,
including that the correct size is being used. While you are
checking the filter envelope, verify that the O-rings on the filter
pan suction tube and pre-filter are present and in good
condition. Missing or worn O-rings will allow the pump to suck
?
button and then pressing the recovery button
Figure 34
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Figure 35 Figure 36