Troubleshooting; Electronic Control Fault Indications - Duke HCSS-48 Operator's And Service Manual

DRIVE THRU SOUP STATION HOLDING UNIT

Troubleshooting

There are no user serviceable parts on the Duke Dry Channel Holding Unit. If a malfunction occurs, then
check all switches and circuit breakers. Check rating label and confirm that unit is operating at the
proper voltage. If the malfunction still exists, contact your Duke Manufacturing Company authorized
service agent or call 1-800-735-3853.

Electronic Control Fault Indications

The control will display a Heating Error under certain conditions. It provides an indication to alert the
operator to failures in the heater circuit. A buzzer will sound for one second every 30 seconds. The
operator can cancel the alarm with the push of any button. The alarm will reactivate after twenty
minutes. When a Heating Error is displayed, the affected well should not be used until a qualified service
technician corrects the cause of the fault. The control will automatically shut down the affected well.
The fault conditions that could cause the control to display a heating error are as follows:
Over – Temperature Fault - An over-temperature fault occurs when the control senses that the well
1.
temperature is higher than the specified factory preset temperature. This occurs when the power is
not removed from the heating element after the channel has achieved the preset temperature,
causing the control to display the error "HIX" where "X" is the zone with the fault. (1 – 4). The
auxiliary thermostat prevents the temperature from exceeding safe levels by regulating the
temperature to a maximum of 375 F.
2. Under – Temperature Fault - An under-temperature fault occurs when the control senses that the
well temperature is lower than the specified factory preset temperature for more than 30 minutes
continuously. This occurs when heating element circuit opens or the RTD Feedback signal is faulty.
The display will read "LOX" where "X" is the zone with the fault (1 – 4).
3. Sensor Failure - A temperature sensor fault occurs when the control senses a short circuit or open
circuit condition in the temperature sensor circuit. The display will read "PRX" where "X" is the zone
with a bad probe (1 - 4). The control will display "000" for the temperature of the channel in a fault
condition.
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