Technical information

Portable Chillers UGH024/11036-38 TROUBLESHOOTING
PLC CONTROL
ALARM
CONDITIONS
Alarm
Evaporator Filter
Fault alarm
Possible cause
Clogged strainer.
Evaporator fouled.
A valve is closed in the
process water flow pip-
ing.
There is a PLC voltage
problem.
The differential pressure
switch is faulty.
Other piping obstruction.
Solution
Clean strainer; replace as needed.
Clean Evaporator. See Cleaning
the Evaporator or Water-cooled
Condenser, in the Maintenance
section.
Check valves; open if closed.
Check voltage (see electrical
drawings).
Check wiring and voltage;
replace switch as needed.
Check that all piping is large
enough to carry fluid. Replace
any piping or conduit that is too
small. Clean any clogs.