Alarm Conditions - Process Technology LUFRAN Instruction

Alarm Conditions:

The following section describes each of the alarm conditions that may occur on the
Lufran fluoropolymer inline water heater.
Alarms Alarm History Menu
Menu
Gnd Fault Ground Fault
Proc o/t Process Overtemp
Humistat # Humidistat Fault
(1 thru 4) – Htr 1 thru Htr 4
H2O Flow
Low Flow Condition
(Low Flow)
Cab Leak Leak Detect
Inlet t/c Inlet T/C Open
L. Level # Liquid Level fault
(1 thru 4) – Htr 1 thru Htr 4
M-43-01
Revision - Date: 08 – 04/06/15
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 outlet water temperature has risen above the HIGH
PROCESS SETPOINT value. This setting is located in
the SYSTEM PARAMETERS MENU.
caused by a sudden and drastic decrease in flow rate or
a failed SSR.
When the outlet temperature falls below the value of this
setting, the unit can be reset.
There is moisture detected in the humidistat connected to
the purge gas outlet of this particular heating column.
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.
The flow rate through the unit has dropped below the
LOW FLOW SETPOINT. This setting is located in the
SYSTEM PARAMETERS menu. This may be caused by
shutting off the water supply to the unit.
This is not an alarm event that requires a manual reset.
Once the flow rate through the heater increases to a level
higher than the LOW FLOW SETPOINT, the heater will
automatically return to normal operation.
The cabinet leak detector has detected a leak inside the
cabinet. This may be caused by a leaking plumbing
connection or one of the heating columns.
Any leaking plumbing fitting should be repaired and the
leak pan must be drained before the fault can be reset.
A leaking heating column must be replaced.
The inlet process temperature sensor has failed (open).
The process temperature sensor must be replaced. This
may also be caused by a disconnected sensor
connection.
The liquid level sensor at the top of heating column does
not detect liquid in the outlet tube of that column. The
system is disabled until the liquid level sensor detects
liquid in the outlet tube of the heating column. This may
be caused by a lack of water to the unit.
This safety will prevent catastrophic overheat damage to
the heating column. The cause of the liquid level fault
must be identified and corrected before the unit can be
reset.
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Lufran Single Outlet Manual