8
Installation and Operation of: 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 Manufac-
turing 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 re-
activate 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:
1. Over – Temperature Fault
- An over-temperature fault occurs when the control senses
that the well 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
0
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 tem-
perature of the channel in a fault condition.
