Vib (Valve Interface Board) Troubleshooting - Frymaster BIELA14-T Series Service Manual

1.12.1 VIB (Valve Interface Board) Troubleshooting

NOTE: DO NOT CHECK WITH HARNESSES UNPLUGGED AS SHORTING THE PINS MAY OCCUR WHICH WILL
DAMAGE THE BOARD.
Problem
Actuator doesn't
function.
Actuator functions on
wrong vat or wrong
valve.
Probable Causes
A. No power to the VIB board.
B. Actuator is unplugged.
C. VIB/FIB board failure.
D. Actuator voltage is incorrect.
E. Actuator is defective.
A. Actuator plugged into wrong connector.
A. Check pins 4 and 5 of J2 at the FIB
board.
voltage on pins 4 and 5 at the other
end of harness and ensure 24VDC is
present. Continue to check pins 4 and
5 for 24VDC on plugs J3 and J4 on the
VIB boards.
B. Ensure the actuator is plugged into the
proper connection (J7 for FV or Right
DV return, J8 for Left DV return and J5
for FV or Right DV drain and J6 for Left
DV drain).
C. Check the DC voltage with the actuator
plugged in on the connector of the
problem
manually open or close an actuator.
DO NOT CHECK WITH ACTUATOR
UNPLUGGED, AS SHORTING THE PINS
MAY OCCUR, WHICH WILL DAMAGE
THE BOARD. Pins 1 (Black) and 4
(White) should read +24VDC when the
actuator is opening. Pins 2 (Red) and 4
(White) should measure -24VDC when
the actuator is closing).
voltage is missing, the VIB board or FIB
board is likely bad. Test the actuator
by plugging into another connector. If
the actuator operates, replace the VIB
board.
D. Check the DC voltage with the actuator
plugged in between pin 3 (blue wire)
and pin 4 (white wire). DO NOT CHECK
WITH ACTUATOR UNPLUGGED, AS
SHORTING THE PINS MAY OCCUR,
WHICH WILL DAMAGE THE BOARD.
Closed = below 0.825VDC and above
4mv. Open = Below 2.475V and above
0.825VDC.
tolerance and will have failure status if
values are above 2.475VDC or less than
4mv.
E. If proper voltages are present at the
connector
operate reset power to the fryer. If it
still doesn't
actuator.
A. Ensure the actuator is plugged into
correct connection (J7 for FV or Right
DV return, J8 for Left DV return and J5
for FV or Right DV drain and J6 for Left
DV drain).
1-32
Corrective Action
Should read 24VDC. Check
actuator while trying
If either
The voltage is out of
and actuator doesn't
operate, replace
to
the