ER SERIES FRYER SERVICE MANUAL SUPPLEMENT- SERVICE PROCEDURES AND ADJUSTMENTS
F24696 (May 2001) Page 8 of 56
SERVICE PROCEDURES AND ADJUSTMENTS
COMPUTER CONTROL BOARD
DIAGNOSTICS
The computer control is 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" under
"TROUBLESHOOTING".
Diagnostics are divided into two areas, "OPERATION" and "SERVICE". Operation mode is the standard mode of
fryer operation. Service mode is intended to give the service technician more information regarding the nature of
a problem encountered. In either mode the fryer operates normally until an error occurs.
If an error occurs, the information displayed will be different. The chart below shows what is displayed for both
"OPERATION" and "SERVICE" modes.
The "SERVICE" mode can only
be entered while an error is occurring. To enter the service mode, press and hold
the product 3 and 4 keys and turn the power switch ON. To exit, turn the power switch OFF.
The following displays/computer responses will be given for the noted conditions.
CONDITION
OPERATION MODE
DIAGNOSTICS
DISPLAY
SERVICE MODE
DIAGNOSTICS
DISPLAY
COMPUTER RESPONSE
No input on
pins
3, 4, 5, or 6
IGN FAILURE
IGN FAILURE on
left side or right side
for split vat only
HEAT OFF
Low
Temperature
(lack of heat)
LOW TEMP LO TEMP XXXF
HEAT OFF
Temperature is below the lowest operational set point. Refer
to "COMPUTER CONTROL" under
"TROUBLESHOOTING".
High
Temperature
Alarm
HIGH TEMP HI TEMP XXX F
HIGH TEMP DISPLAYED
Output at pin 15 and/or 16 (split vat) should already be OFF
unless there is a problem with computer. Vat temperature is
410°F or higher which is well above the highest operational
set point. Refer to "COMPUTER CONTROL" under
"TROUBLESHOOTING".
High
Temperature
(high limit)
OFF OFF
OFF DISPLAYED
Mechanical high limit is OPEN (435°F), heat OFF and input is
removed from pin 1 and/or pin 2 which indicates to the
computer --- VAT TURNED OFF.
Tilt Switch
OPEN
OFF OFF
OFF DISPLAYED
Heaters raised or problem with the tilt switch. Heat is OFF
and input is removed from pin 1 and/or pin 2 which indicates
to the computer --- VAT TURNED OFF.
Drain Valve
Switch
(if installed)
DRAIN OPEN DRAIN OPEN
DRAIN OPEN DISPLAYED
, HEAT OFF
Input is removed from pin 10. Drain valve is OPEN or there is
a problem with switch.
Probe
Open or Short
CALL SERVICE
PROBE OPEN R or
L for split vat
PROBE SH R or L
for split vat
HEAT OFF
No input on
pin 11
CLOSE DOOR CLOSE DOOR HEAT OFF
Not passing
Self Check
CALL SERVICE MICRO FAIL System will operate in backup mode
