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GP Series Portable Chillers Chapter 6: Troubleshooting 53 of 90
system fault
Chiller too small for load
Verify with sales representative
the sizing of the chiller for the
application.
Low Condenser Differential
Pressure Warning
18 W
Low discharge pressure or
high suction pressure
Contact customer service
Condenser Inlet Temp Sensor
Failure (optional with sensor
pack)
19 W
Sensor wires loose from
controller terminal block
Verify wiring at terminal block.
.
Sensor wires broke between
sensor and controller terminal
block.
Replace temperature sensor
Chiller In Fluid Temp Sensor
Failure
20 W
Sensor wires loose from
controller terminal block
Verify wiring at terminal block.
.
Sensor wires broke between
sensor and controller terminal
block.
Replace temperature sensor
Evaporator Differential Pressure 21 W
Blocked evaporator
Backflush evaporator
Blocked Y-strainer
Blow down y-strainer by
opening blow-down valve or
clean internal strainer.
High Discharge Pressure Warning 22 W
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
High Fluid Temp Warning 23 W
Fluid temperature higher than
parameter.
Verify parameter and adjust if
necessary.
Refrigeration system fault
Check for any refrigeration
system fault
Chiller too small for load
Verify with sales representative
the sizing of the chiller for the
application.
CC = Compressor Critical SC = System Critical PC = Process Critical W = Warning
Alarm Name
#
Type
Possible Cause
Solution
High Level Fault 24 W
Fluid level higher than
parameter setting.
Verify value in parameter
Too much fluid in system
Open drain valve and remove
some fluid from system so that
level is below high level fault.
Tank sensor failure
Replace sensor
High Level Warning 25 W
Fluid level higher than
parameter setting.
Verify value in parameter
Too much fluid in system
Open drain valve and remove
some fluid from system so that
level is below high level
warning.
Tank sensor failure
Replace sensor
Compressor Differential Pressure
Fault
26 CC
Low discharge pressure or
high suction pressure
Contact customer service
High Suction Pressure Warning 27 W
From Process fluid
temperature too high
Verify flow through system.
Make corrections as necessary.
Low Discharge Pressure Warning
28
W
Ambient air or condenser
Verify ambient air temperature