Technical information

PLC C
ONTROL
ALARM
CONDITIONS
Alarm
Flow Fault alarm
Possible cause
The To Process and From
Process valves are closed.
The Process fluid strainer
is clogged.
Water level in reservoir is
low and float switch
failed.
The evaporator is fouled.
Pump is not running.
Pump is running back-
wards; no pump pressure
is indicated on pump dis-
charge pressure gauge.
Evaporator is frozen.
Solution
Open valve(s).
Clean the strainer.
Fill the reservoir. See Making
Process Plumbing
Connections, in the Installation
section.
Clean Evaporator. See
Cleaning the Evaporator or
Water-cooled Condenser, in the
Maintenance section.
Check the overload module.
Reset or replace as needed.
See Replacing Overload
Modules, in the
Troubleshooting section.
Switch any two of the three
main power leads.
Apply warm air to the evapo-
rator to thaw.
UGH024/1103 Portable Chillers
TROUBLESHOOTING
6-29