Fq4000 Controller Functional Troubleshooting - Frymaster FilterQuick easyTouch FQG60T Service Manual

Problem
FQ4000 displays
E65
FQ4000 displays
E28 HEATING FAILURE.
FQ4000 displays software
version for only FQ4000,
SIB, VIB or FIB but not all
boards.
FQ4000 displays IS VAT
FULL? YES NO.

1.23.1.1 FQ4000 Controller Functional Troubleshooting

There are four (4) LED status lights on the rear of the controller which provide a quick method to verify power and touch screen
functionality on the FQ4000 controller.
To verify that the FQ4000 has power and the touch screen is functional, remove the 2 screws attaching the controller to the bezel.
Lower the controller to view the LED's on the read of the controller board. Verify that the three (3) green LED's are illuminated
which indicate that 3V, 5V and 12V power is present on the controller. These should be illuminated at all times. Pressing anywhere
on the front of the touch screen will illuminate the red LED STATUS (see photo below). The red LED will also illuminate during
power up momentarily.
12V
from SIB 5V from
3V from power
SIB supply on UIB
Probable Causes
A. Low oil
B. Dirty or stuck float switch.
Failed or closed gas valve, dirty blower,
low micro amps, defective sensor wire,
defective igniter/ignition cable,
defective ignition module, improper
gas pressure, failed SIB, or open high-
limit thermostat.
Loose or damaged harness
A. Normal operation during most at
the beginning or end of most
filtration functions.
B. If the display appears many times
during a filter it could be an
indication of slow oil return
C. A filter error has occurred due to
dirty or clogged filter pad or
paper, clogged pre-filter, clogged
filter pump, filter pump thermal
overload, improperly installed
filter pan components, worn or
missing O-rings, cold oil or an
actuator problem.
When the touch screen is
pressed the STATUS LED
illuminates RED.
The float switch does not detect oil.
1. Ensure the frypot is full of oil.
2. Float switch may be stuck up or down.
3. Clean the float switch.
Ensure the float switch moves freely up and down. Ensure
when removing the float switch that its position is clearly
marked and replaced properly. Installing the float upside
down will change the switch from N/O to N/C. This could
allow the empty frypot to ignite. If the sensor is clean, the
time delay relay board may be the issue.
Turn off the vat with the issue and back on again to see if issue
corrects itself. The error is displayed if the fryer loses its
ability to heat oil. This error comes from the alarm signal on
the ignition module. It sometimes is seen when air is in the
gas line.
Check that all harnesses between FQ4000's, SIB, VIB and FIB
are secure. Check for loose or broken pins/wires. If the
problem persists, swap out controller from one bank to
another and see if the problem follows the controller. Power
cycle the fryer.
A. Ensure the vat is full of oil and press the √ button.
B. See section 1.19.2 troubleshooting –Filter Pump runs, but
oil return is very slow.
C. Ensure the filter pad/paper is clean, pre-filter is clean; O-
rings are present and not worn; filter pump overload is not
tripped.
1-49
Corrective Action