Sterlco GP Series 5-15 HP Portable Chillers - Manual (Page 57)

GP Series Portable Chillers Chapter 6: Troubleshooting 57 of 93
CC = Compressor Critical SC = System Critical PC = Process Critical W = Warning
Alarm Name # Type Possible Cause Solution
Pump Overload 16 SC
Motor circuit protector open
Verify motor circuit protector
operation. Verify motor wiring
and amp draw while under load.
Pump flow rate in excess of
capacity
Verify system valves are
operational and properly set.
Contact customer service or
sales if pump is sized too small
for application.
High Fluid Temp Fault 17 SC/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.
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.