Alarms - Process Technology Lufran LUF Series Manual

Engineering Information (Continued):

Alarms:

The following section describes each of the alarm conditions that may occur on the LUF-series Lufran
fluoropolymer inline water heater.
Alarms Alarm History Menu
Menu
Ground Fault Ground Fault
Col #
Overtemp Column # Overtemp
(1-4)
Element #
Overtemp Element # Overtemp
(1-4)
Outlet TC Process Sensor
Open Circuit Disconnected
Element #
TC Open Element # Sensor
Circuit Disconnected
(1-4)
PLC Battery
PLC Battery Fault
Fault
PLC Comm.
Communication Error
Fault
PRV Fault Pressure Relief Valve
Column # TC
Column # Sensor
Open Circuit
Disconnected
(1-4)
Humidity
Humidity Fault
Fault
M-43-25
Revision - Date 03-01-04-18
Description
A ground fault has occurred somewhere in the unit. This may
be caused by a failed component. The cause of the ground
fault must be identified and corrected before the heater is reset.
The water temperature inside the heating column has risen
above the setting of the associated SLC module in the SLC
CONFIGURATION display. This may be caused by lack of
water flow, a failed SSR or a failed sensor.
When the element temperature falls below the setting of the
SLC module, the unit can be reset.
The element temperature has risen above the setting of the
associated SLC module in the SLC CONFIGURATION display.
This may be caused by lack of water flow to the unit, a failed
SSR or a failed t/c sensor.
When the element temperature falls below the setting of the
SLC module, the unit can be reset.
The outlet process temperature sensor has failed (open). The
process temperature sensor must be replaced. This may also
be caused by a disconnected sensor connection.
The element over-temperature sensor has failed (open). The
sensor must be replaced.
disconnected sensor connection.
The backup battery for the PLC is measuring low-voltage or has
lost it's charge. The battery must be replaced.
PLC communications to the ADAM module, TC1 module or
SLC modules has been interrupted. Check modules for power
or disconnected wiring.
The liquid sensor mounted in the pressure relief valve (PRV)
discharge tube has detected liquid in the discharge tube. This
is caused by high water pressure applied to the unit. This may
be caused by inlet water pressure exceeding 6.9 bar (100 psi).
When the water pressure drops to an acceptable level and the
PRV closes, the unit can be reset.
One of the column TC sensors has failed (open). The sensor
must be replaced. This may also be caused by a disconnected
sensor connection.
There is moisture detected in the humidistat connected to the
purge gas outlet of the heater. This may be caused by a
ruptured tube or a leaking seal in the heating column, or a
normal heater response following an extended shutdown
period.
In most cases this leak can not be repaired and the heating
column must be replaced. If restarting the heater following an
extended shutdown period, exhaust the purge gas for 8-hours
before attempting to reset the unit.
30
This may also be caused by a
LUF-Series Lufran Manual
Standard outlet, Standard Interface