ELECTRIC FRYERS - ELECTRICAL OPERATION
19
COMPUTER CONTROL
BOARD DIAGNOSTICS
NOTE:
The computer control is also used on other
equipment and is capable of displaying many
different prompts. Therefore some prompts not
applicable may display when a problem occurs in
the wiring harness. Since the computer is looking for
either 24 VAC or 24 VAC ground on particular pins,
an open connection can cause a non applicable
prompt to appear. Refer to “Computer Control
Harness Pin-outs Chart”
For operator programming and operation refer to
that section in the Instructions Manual.
Diagnostics is divided into two areas, “operation”
and “service”. Operation mode is the usual mode of
fryer operation. Service mode is intended to give
the service person more information regarding the
nature of the failure. In either mode the unit
operates normally until an error occurs. In that case
what is displayed will be different. The chart below
shows what is displayed for both “operation” and
“service” modes.
Service mode is entered by pressing the product 3
and product 4 keys while turning on the power to the
fryer computer. Once in service mode you can only
exit it by turning off the power switch.
The following displays/system responses will be
given for the noted failure conditions.
FAILURE OPERATION MODE
DIAGNOSTICS
DISPLAY
SERVICE MODE
DIAGNOSTICS
DISPLAY
SYSTEM RESPONSE
Ignition (gas
heat)
IGN FAILURE IGN FAILURE with L or R
for split vat
Heat off
Low
Temperature
(lack of heat)
LOW TEMP LO TEMP XXXF Heat off
High
temperature
(1st limit)
HIGH TEMP HI TEMP XXX F Heat off
High
Temperature
(2nd limit)
OFF OFF Hardware limit, Vat off
Tilt Switch open OFF OFF Vat off
Clogged Filter
(gas heat)
turn on AIR indicator turn on AIR indicator none
Probe CALL SERVICE PROBE OPEN R or L for
split vat
PROBE SH R or L for split
vat
Heat off
Door Open CLOSE DOOR CLOSE DOOR Heat off
Self check CALL SERVICE MICRO FAIL System to backup mode
