Troubleshooting - Process Technology LUFRAN Instruction

TROUBLESHOOTING:

Alarm
Gnd Fault
Process Thermocouple
Proc o/t
Humidistat
Humidistat Alarm
(1 thru 4)
Low Flow Deviation
Low Flow
Cabinet Leak Alarm
Cab Leak
Inlet Thermocouple Alarm
Inlet t/c
M-43-01
Revision - Date: 08 – 04/06/15
Description
1. Using an ohmmeter, measure each heater's power leads to earth ground
and look for a short circuit. If a short to ground is identified within a column,
it must be replaced. Consult the factory for the appropriate replacement.
Ground Fault 2. Check the flashing sequence of the LED light on the GFCI module. The
flashing sequence will indicate whether there is an actual Ground Fault
problem. The LED sequence can be verified against a label on the GFCI
component. Replace as needed. Consult the factory for the appropriate
replacement.
The outlet water temperature has risen above the HIGH PROCESS
SETPOINT value. This setting is located in the SYSTEM PARAMETERS
MENU. This may be caused by two possible problems.
1. A sudden and drastic decrease in flow rate
Overtemp
2. A failed forward 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 indicated by the alarm button located
on the Alarm screen of the OIP. 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. A visual inspection should be done on the
column when indiacted by the alarm for any external water that may be
leaking. In most cases this leak can not be repaired and the heating column
must be replaced. Consult the factory for the appropriate replacement.
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
Alarm 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. Consult the factory for the appropriate replacement.
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. Verify that the sensor is operating
properly by using an ohm meter to verify that the Thermocouple is ion good
working condition. If the The thermocouple is working properly it is possible
that the PLC input card may be damaged and need replaced. Consult the
factory for the appropriate replacement component.
Action Required
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Lufran Single Outlet Manual