LOV
™
Technical Reference
3
The ATO board is positioned in a box with the transformer,
which provides power for the board. The box also may
have a power switch, which allows the system to be shut
off (switch removed in later models).
The reservoir, or JIB, rests behind the right
door of the fryer. A light on the front of the fryer
illuminates when the jug is empty.
Problem Probable Cause Fix
JIB light won’t
illuminate.
Auto top off power switch is off.
(switch removed in later models)
No three-phase power in the
contactor box/component box
supplying the ATO box.
Failed transformer in ATO box.
Loose wire.
1.
2.
3.
4.
Verify that the auto top off power switch is
switched on. The switch is located behind
the JIB on the left side of the auto top
off control box. (switch removed in later
models)
Ensure power is present
Check transformer output; replace if
necessary.
Check connection between JIB LED and J6
on ATO board.
1.
2.
3.
4.
Only one vat tops
off.
Failed solenoid.
Loose wire connection.
1.
2.
Check power to pump. A hot pump
suggests a failed solenoid.
Check wiring harnesses on ATO board and
solenoids.
1.
2.
Wrong vat tops off. Wired wrong.
Flex oil lines incorrectly
connected.
1.
2.
Check wiring.
Correct fl ex line connections.
1.
2.
Troubleshooting the Top Off System
Power
Switch
ATO
Board
Transformer
Oil trickles into the
frypot from a port
behind the elements in
electric fryers. In gas
fryers, it comes from a
port on the foam deck.
This part of the system
is not designed to fi ll
up the vat.
Port
Sensor
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