Vib (Valve Interface Board) Troubleshooting - Frymaster FilterQuick easyTouch FQG60T Service Manual

1.22.1 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.
Should read 24VDC. Check 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 return and J5 for
drain).
C. Check the DC voltage with the actuator
plugged in on the connector of the problem
actuator while trying to manually open or
close an actuator.
ACTUATOR
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).
either voltage is missing, the VIB board or
FIB board is likely bad. Test the actuator by
plugging into another connector.
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).
ACTUATOR
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.
The voltage is out of 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 and actuator doesn't operate
reset power to the fryer. If it still doesn't
operate, replace the actuator.
A. Ensure the actuator is plugged into correct
connection (J7 for return and J5).
1-43
Corrective Action
DO NOT CHECK WITH
UNPLUGGED
If the
DO NOT CHECK WITH
UNPLUGGED
AS
If
AS