Vulcan-Hart 126905, Service Manual Supplement

Page: 51 / 56

ER SERIES FRYER SERVICE MANUAL SUPPLEMENT - TROUBLESHOOTING
F24696 (May 2001) Page 51 of 56
COMPUTER CONTROL
NOTE: The computer control is also used in other equipment, therefore it is possible for unrelated error prompts
to appear if a problem occurs in the computer main harness plug.
SYMPTOM POSSIBLE CAUSES
Fryer does not heat. 1. Power switch OFF or inoperative.
2. Main circuit breaker(s) OFF or the fryers internal circuit
breaker(s), if applicable, OFF.
3. Control circuit fuse 1FU or 2FU OPEN.
4. Drain valve switch malfunction (if installed).
5. Malfunctioning heat control relay R2 (full vat or right side
split vat) or R4 on left side split vat only.
6. Contactor(s) malfunctioning.
7. Computer power supply board or transformer 1T or 2T
inoperative.
8. Open pins 23 or 24 (12 VDC).
9. Open 24 VAC pin 1 (full vat or right side split vat) or pin 2
on left side split vat only.
10. Open pin 15 right heat output (full vat or right side split
vat), or pin 16 left heat output on left side split vat only.
11. Computer main harness wiring problem.
12. Malfunctioning computer control.
Fryer displays "HI TEMP" alarm message. 1. Low oil.
2. Frying oil temperature above 410°F, heating elements
not turning OFF.
A.
Malfunctioning heat control relay R2 (full vat or right
side split vat) or R4 on left side split vat only.
B. Contactor(s) malfunctioning.
3. Malfunctioning computer control.
A.
Pin 15 right heat output (full vat or right side split
vat), or pin 16 left heat output on left side split vat
only, not turning OFF.
Fryer heats slowly. 1. Incoming voltage incorrect.
2. Heating element(s) malfunction.
Fryer displays "CALL SERVICE" 1. Probe malfunction.
2. Failed self-check.
3. Malfunctioning computer control.
Fryer displays "IGN FAILURE" 1. Pins 3, 4, 5 or 6 not connected to 24VAC.
Fryer displays "DRAIN OPEN" 1. Drain "ball" valve left OPEN.
2. Pin 10 not connected to 24VAC.
3. Drain valve switch malfunction (if installed).
Fryer displays "OFF" 1. Second high limit OPEN or tilt switch OPEN or tilt switch
malfunction.