Technical information

Portable Chillers UGH024/1103
6-40 TROUBLESHOOTING
PLC CONTROL
ALARM
CONDITIONS
Alarm
High Discharge
Pressure 2 alarm
Possible cause
Clogged/dirty air-cooled
condenser.
Blocked air flow to air-
cooled condenser.
Low condenser water flow
or water too warm to water-
cooled condenser.
Blocked condenser water
line or valve closed.
Condenser fouled.
Fan motor not running.
Faulty liquid line solenoid
valve.
Compressor discharge valve
closed (if supplied).
Overcharged with refriger-
ant.
Faulty water regulating
valve.
Faulty pressure transducer.
Solution
Clean the coil. See Cleaning the
Air-cooled Condenser, in the
Maintenance section.
Move chiller or unblock air pas-
sageway.
Check required flow; see
Specifications in the Description
section.
Unblock line; open valve. Check
and clean filter strainer.
Clean the condenser. See Cleaning
the Air-cooled Condenser, and
Cleaning the Evaporator or Water-
cooled Condenser, in the
Maintenance section.
Check fan cycling operation set-
tings. Motor may be bad. See Drive
manual electrical information
accompanying this user guide.
Check voltage. Replace valve as
needed.
Open valve.
See Checking the Refrigerant
Charge, in the Maintenance section.
Repair or replace the valve.
See Adjusting the Pressure
Transducer, in the Troubleshooting
section.