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GP Series Portable Chillers Chapter 6: Troubleshooting 55 of 90
Auxilliary Alarm
41
SC/W
This alarm is configurable
Low Suction Pressure at Startup 42 CC
Parameter set too short for
remote condenser installation
Adjust parameter for length of
time to build suction pressure
Refrigerant amount too low
Contact Customer Service
For Units with a Tempered Loop
To ProcTemperature Sensor
Failure
43 PC Loose or broken sensor wire
Verify wiring of temperature
sensor at sensor and terminal
block of controller
Process High Temp Fault 44 W
Process heater on
Verify heater contactor
operation
Process cooling valve off
Verify cooling valve operation
Process High Temp Warning 46 W
Process heater on
Verify heater contactor
operation
Process cooling valve off
Verify cooling valve operation
Process Low Temp Fault 48 W
Process heater off
Verify heater contactor
operation
Process cooling valve on
Verify cooling valve operation
Process Low Temp Warning 50 W
Process heater off
Verify heater contactor
operation
Process cooling valve on
Verify cooling valve operation
Pump 2 No Flow 52 SC/W
Optional process flow switch
failure
Verify operation of flow switch.
Process valves closed
Verify operation of process
valves and adjust as necessary
CC = Compressor Critical SC = System Critical PC = Process Critical W = Warning
Alarm Name
#
Type
Possible Cause
Solution
Pump 2 Overload 53 SC/W
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 Temp Safety Switch 54 PC
Heater failure
Verify operation of heater and
cooling valve. .
Cooling Valve failure
Verify wiring at cooling valve
and at terminal bloc
Sensor failure
Replace sensor if necessary.
Phase Monitor Fault 55 SC
Unit wired incorrectly
Reverse two wires at line-side
of power switch on electrical
panel.
Loss of phase during
operation
Verify sensor wiring at sensor
and at terminal bloc.
Sensor failure
Replace sensor if necessary.
From Proc Sensor Failure 56 W
Sensor wires loose from
controller terminal block
Verify wiring at sensor and at
terminal block. y.
Sensor wires broke between
sensor and controller terminal
block.
Replace sensor if necessar
Non-Controller Related Issues
Problem
Possible cause
Solution
Unit does not run.
No power.
Check main disconnect, fuses, wiring,
and power lead to unit.
Wrong voltage supplied to unit.
Voltage must be within plus or minus
10% of nameplate rating.