Process Technology LUFRAN Instruction page 57

Alarm Conditions (Continued):
Alarms Alarm History
Menu
Col # MB SSR Board Fault
(1 thru 4) – Htr 1 thru Htr 4
PLC PLC Fault
H2O PSI
Low Water Pressure
(Pres SW)
Col # o/t Column OT –
(1 thru 4) Htr 1 thru Htr 4 (slc)
M-43-01
Revision - Date: 08 – 04/06/15
Menu
One of the SSR monitor boards has detected an open or
shorted SSR. This may be caused by a failed SSR or a
tripped power fuse in the unit.
The tripped fuse or the failed SSR must be replaced before
the unit can be reset.
A problem has occurred with the PLC itself, and the system
is unable to operate normally. Inspect the PLC unit itself
and correct any open or broken connections.
Try cycling main power to clear this fault.
If the PLC Fault alarm will not clear, contact PROCESS
TECHNOLOGY for assistance.
The water supply pressure has dropped below the setting
for the pressure switch. This may be caused by shutting off
the water supply to the unit.
The water pressure must increase to a level above the
pressure switch setting in order for the unit to return
automatically to normal operation.
The water temperature inside the heating column has risen
above the setting of the control system.
caused by lack of water flow, a failed SSR or a failed t/c
sensor.
The values of these temperature settings are an internal
adjustment that is not accessible by the operator. It may
only be adjusted by qualified personnel.
When the element temperature falls below the setting of the
slc, the unit can be reset. NOTE: this alarm can not be
reset through the PLC. Rather, this alarm must be reset
by shutting down the unit and then powering up the
unit. Refer to the SHUTDOWN section on page 53 of
this manual for the appropriate procedure.
Description
- 57 -
This may be
Lufran Single Outlet Manual