Ato (Automatic Top-Off) Troubleshooting - Frymaster OCF30 Service & Parts Manual

1.11.1 ATO (Automatic Top-off) Troubleshooting

Problem
Frypots won't top off.
Controller displays
TOPOFF OIL
EMPTY / CONFIRM
Frypot tops off cold. Incorrect setpoint
No power to ATO board
One vat doesn't top off.
Probable Causes
A.
JIB out of oil
B.
Supply line from JIB is clogged.
C.
Probe temperature lower than setpoint.
D.
E.
Temperature in supply line or JIB is too
low.
F.
ATO board power loss
G.
Failed solenoid.
H.
ATO pump failed or over tightened.
I.
Failed transformer/harness.
J.
Failed ATO board.
K.
Top-off manifold solenoid failed closed.
L.
Jumper missing in ATO board 4 and 5
battery units
Top off system out of oil.
A.
J5 connection unplugged
B.
Fuse blown
C.
Transformer malfunction
A.
Filter error exists.
B.
Pump, loose connection, RTD or ATO
issue.
Corrective Action
A. Ensure the JIB is not out of oil and
supply line is in the JIB. Replace JIB
and press the  button when
prompted to reset top off system.
B.
Remove supply line from pump and
blow air through line towards JIB.
C.
Check to see that fryer is heating.
Fryer temperature must be at least
300°F
resistance. If probe is bad, replace the
probe.
D.
E.
Ensure oil is above 70°F (21°C).
F.
Power to the ATO board has been cut
off. Restore power to the board and
switch all controllers off and on again
to readdress system.
G.
Check solenoid to see if functioning
properly.
H.
If the solenoid is working, ensure that
the screws on the bottom of the pump
are not too tight. Loosen the screws.
If loosening the screws doesn't fix the
problem, replace the pump.
I.
Ensure transformer in ATO box is
functioning properly.
from transformer to ATO board.
Ensure all harnesses are plugged
securely into place.
J.
Check for proper voltages using the
pin position chart found on page 1-17.
If ATO found defective, replace ATO
board.
K.
A pressure switch opens in the pump
with excessive pressure in the top-off
manifold, shutting down the pump.
Clear or replace solenoid.
L.
Jumper in J4/J5 missing on ATO #2
board in pins 7 & 8.
Fill top off system with oil and press the
 (CONFIRM) button.
Ensure setpoint is correct.
A.
Check to ensure J5 on front of ATO
board is fully locked into connector.
B.
Ensure fuse below right control box is
not blown and fuse on the right side
of ATO box is not blown.
C.
Check that proper voltage is present
at transformer.
A.
Clear filter error properly.
B.
Check ATO pump, wire connections,
RTD and ATO board.
1-15
(149°C). Check probe
Check power