1.13 AIF (Automatic Intermittent) Filtration Service Procedures
The AIF (Automatic Intermittent Filtration) board controls the actuators that open and close the drain and return valve. The AIF boards are located inside a protective housing under each frypot (see Figure 13).
Figure 13
1.13.1 AIF Troubleshooting
Problem | Probable Causes |
| A. No power to the AIF board. |
| B. Actuator is unplugged. |
Actuator doesn’t | C. AIF board failure. |
function. | |
| D. Actuator readings are out of tolerance. |
| E. Actuator is bad |
Actuator functions on | A. | Actuator plugged into wrong connector. |
wrong vat. | B. | Locator pin is in wrong position. |
Corrective Action
A.Check pins 5 and 6 of J2 at the MIB board. Should read 24VDC. Check voltage on pins 5 and 6 at the other end of harness and ensure 24VDC is present. Continue to check pins 5 and 6 for 24VDC on plugs J4 and J5 on the AIF boards.
B.Ensure the actuator is plugged into the proper connection (J1 for FV return, J3 for DV return and J6 for FV drain and J7 for DV drain).
C.Check power on the connector of the problem actuator while trying to manually open or close an actuator. Pins 1 (Black) and 4 (White) should read +24VDC when the actuator is opening. Pins 2 (Red) and 4 (White) should measure
D.Check resistance of the potentiometer between pin 3 (purple wire) and pin 4 (gray/white wire). Closed should read
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 (J1 for FV return, J3 for DV return and J6 for FV drain and J7 for DV drain).
B. Ensure the locator pin is in proper position in plug J2. See table B on page
