Computer Control - Vulcan-Hart GR Series Service Manual

GR Series Gas Fryers with NCC Controls (formerly Tridelta / Built after 3/05) - TROUBLESHOOTING
Alarms
When drain valve is opened, the DVI switch contacts open, and the 24VAC input to the
controller is removed. The heat demand (heat on) and basket lift outputs are disabled. Any
cooking in progress is canceled, and all operator buttons are disabled. The display will show
"drn" (drain).
When the drain valve is closed, the DVI switch contacts close, and the 24VAC input to the
Drain Valve Interlock
controller is restored. The heat demand (heat on) and all operator buttons will remain
(DVI)
disabled, and the display will show "FiLL TanH" (fill tank).
To resume operation, complete the filtering sequence as follows: Press and hold Filter key
for 3 seconds to start the pump motor. When all shortening is returned to the fry tank, press
Filter key to stop pump motor. The display alternates in a continuous loop "TanH FULL," "Hlt
TEEP" (tank full, hit temp). Press the Temp key. Fryer is now ready for operation.
The following alarms take precedence over any other controller mode or function.
Alarms
If an open probe is detected, the heat demand (heat on) and basket lift outputs are disabled.
Any cooking in progress is canceled, and all operator buttons are disabled. The display
Open Probe
shows "PROBE OPEN," and the electronic alarm will sound continuously.
NOTE: A temperature of less than 40°F is an open probe equivalent.
If a shorted probe is detected, the heat demand (heat on) and basket lift outputs are disabled.
Any cooking in progress is canceled, and all operator buttons are disabled. The display
Shorted Probe
shows "PROBE SHORT," and the electronic alarm will sound continuously.
NOTE: A temperature of 460°F or greater is a shorted probe equivalent.
If the temperature is greater than or equal to 415°F, the heat demand (heat on) is disabled.
Any cooking in progress is canceled, and all operator buttons are disabled. The display
Hi Temperature
shows "HIGH TMP," and the electronic alarm will sound continuously. Normal fryer operation
resumes when the temperature drops below the high temperature alarm level.
If this input is not active (24VAC = active), the display will show "PILOT OUT" (for gas pilot
out). If the input remains inactive for greater than 90 seconds, the display will show
Ignition Status
"IGNITION LOCKOUT," the electronic alarm will sound continuously, and the controller will
be disabled (all output, including heat demand off) until power is cycled.
When drain valve is opened, the DVI switch contact open, and the 24VAC input to the
controller is removed. The heat demand (heat on) and basket lift outputs are disabled. Any
cooking in progress is canceled, and all operator buttons are disabled. The display will show
"DRAINING FILTER." If the filter prompt is active (flashing), "DRAINING FILTER" is
displayed; if the dispose prompt is active (flashing), "DRAINING DISPOSE" is displayed.
Drain Valve Interlock When the drain valve is closed, the DVI switch contacts close, and the 24VAC input to the
(DVI) controller is restored. The heat demand (heat on) and all operator buttons will remain
disabled, and the display will show "FILL TNK FILTER."
To resume operation, complete the filtering sequence as follows: Press and hold Filter key
for 3 seconds to start the pump motor. When all shortening is returned to the fry tank, press
Filter key to stop te pump motor. Display shows "TNK FULL HIT TEMP." Press the Oil Temp
key. Fryer is now ready for operation.
Description

COMPUTER CONTROL

Description
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F35660 Rev. A (0717)