Control Power Reset; Testing Ato Rtd Probes; Replacing Ato Probe - Frymaster FootPrint OCF30G Service & Parts Manual

1.13.6 Control Power Reset Switch
The control power reset switch, is a momentary rocker switch located
below the left control box (see Figures 6), that resets all power to all the
controllers and boards in the fryer. It is necessary to reset all power after
replacing any controller or board. Press and hold the switch for at least
ten seconds when resetting the control power to ensure power has
sufficiently drained from boards.

1.13.7 Testing ATO RTD Probes.

The controller features a quick way to compare the temperature of the ATO RTD to the vat temperature. This
is useful for diagnosing ATO issues.
With the controller OFF, press and hold the TEMP button. The controller will display AIF and ----- followed
by ATO and current resistance temperature. Ignore the AIF display. It shows ---- if not installed. Compare
the resistance of the ATO probe against the controller reading. If the values differ greatly a harness issue may
exist.

1.13.8 Replacing ATO Probe

See steps 1.9.2 on page 1-8.
1.14 Controller Service Procedures
1.14.1 Controller Troubleshooting
Problem
No Display on
Controller.
Controller displays
filter busy.
Probable Causes
A. Controller not turned on.
B. No power to the fryer.
C. Controller has failed.
D. Damaged controller wiring harness.
E. Power supply component or interface
board has failed.
A. Another filtration cycle is still in
process.
Figure 6
Corrective Action
A. Press the ON/OFF switch to turn
the controller on.
B. Verify controller power cord is
plugged in and that circuit breaker
is not tripped.
C. Swap the controller with a
controller known to be good. If
controller functions, replace the
controller.
D. Swap with a harness known to be
good. If controller functions,
replace the harness.
E. If any component in the power
supply
transformer and interface board)
fail, power will not be supplied to
the controller and it will not
function.
A. Wait until the previous filtration
cycle ends to start another filtration
cycle. This may take up to one
minute.
displayed with no activity, remove
and restore ALL power to the fryer.
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system (including the
If filter busy is still