Sterlco GP Series 20-60 HP Packaged Chillers - Manual (Page 59)

GP Series Portable Chillers Chapter 6: Troubleshooting 59 of 93
CC = Compressor Critical SC = System Critical PC = Process Critical W = Warning
Alarm Name # Type Possible Cause Solution
Pump Flow Sensor Failure 34 W Optional flow sensor failed
Verify wiring of flow sensor at
sensor and terminal block of
controller
Pump Pressure Sensor Failure 35 W
Sensor wires loose from
controller terminal block
Verify wiring of sensor at
sensor and terminal block of
controller
Sensor wires broke between
sensor and controller terminal
block.
Refrig Liquid Temp Sensor
Failure
36 W
Sensor wires loose from
controller terminal block Verify wiring of sensor at
sensor and terminal block of
controller
Sensor wires broke between
sensor and controller terminal
block.
Refrig Suction Temp Sensor
Failure
37 W
Sensor wires loose from
controller terminal block Verify wiring of sensor at
sensor and terminal block of
controller
Sensor wires broke between
sensor and controller terminal
block.
Tank Level Sensor Failure 38 W
Sensor wires loose from
controller terminal block Verify wiring of sensor at
sensor and terminal block of
controller
Sensor wires broke between
sensor and controller terminal
block.
Water make-up failure 40 W
Make up solenoid failure
Verify wiring of solenoid valve
at valve and at terminal block.
Insufficient water pressure
Increase water pressure to be
above 5 psig (0.3 bar)
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