GP Series Portable Chillers Chapter 6: Troubleshooting 51 of 90
CC = Compressor Critical SC = System Critical PC = Process Critical W = Warning
Alarm Name
#
Type
Possible Cause
Solution
Compressor Fault 1 CC
MCP Failure
Allow the compressor to cool
down. If the compressor does
not restart, disconnect power
and verify operation of the
MCP internal module. Replace
if necessary.
Compressor module has failed
Discharge Pressure Sensor Failure 2 W
Sensor Failure
Check the wiring connection at
the sensor, and at the controller.
If necessary replace sensor.
Electrical connection at
sensor open
Electrical connection at
controller open
Fan Overload 3 CC Internal fan motor overload
tripped
Allow the fan to cool down. If
the fan does not restart when
called upon by controller,
replace fan motor.
VFD Fault 4 CC Drive has detected internal
fault
Locate the drive and write
down the fault code shown on
the display of drive. Contact
customer service for assistance.
High Discharge Pressure Fault 5 CC
Dirty air cooled condenser or
inlet filter
Clean filter or condenser
Dirty water cooled condenser
or condenser valve failure
Clean condenser or verify
operation of condenser valve
Condenser fan overload
See Fan Overload Fault
Condenser fan VFD fault
See VFD Fault
Ambient air or condenser
water temperature too high
Verify supply temperature or air
removal capacity.
Too much refrigerant in
system.
Contact Customer Service for
assistance
Liquid line valves closed.
Verify operation of valve and
wiring on controller
Discharge pressure switch
failure
See Discharge Pressure Sensor
Failure
High Discharge Pressure Switch 6 CC
Dirty air cooled condenser or
inlet filter
Clean filter or condenser
Dirty water cooled condenser
or condenser valve failure
Clean condenser or verify
operation of condenser valve
Condenser fan overload
See Fan Overload Fault
Condenser fan VFD fault
See VFD Fault
Ambient air or condenser
water temperature too high
Verify supply temperature or air
removal capacity.
Too much refrigerant in
system.
Contact Customer Service for
assistance
Liquid line valves closed
Verify operation of valve and
wiring on controller
Discharge pressure switch
failure
See Discharge Pressure Sensor
Failure
High Suction Pressure Fault
7
CC
From Process fluid
temperature too high
Verify flow through system.
Make corrections as necessary.
CC = Compressor Critical SC = System Critical PC = Process Critical W = Warning
Alarm Name
#
Type
Possible Cause
Solution
Low Discharge Pressure Fault 8 CC
Ambient air or condenser
water temperature too low
Verify ambient air temperature
and air flow or condenser inlet
water temperature.
Too little refrigerant in
system.
Contact customer service for
service call