Auxilliary Alarm

41

SC/W

This alarm is configurable

 

 

 

Low Suction Pressure at Startup

42

CC

Parameter set too short for

Adjust parameter for length of

 

 

remote condenser installation

time to build suction pressure

 

 

For Units with a Tempered Loop

 

 

Refrigerant amount too low

Contact Customer Service

 

 

 

 

 

 

 

 

 

To ProcTemperature Sensor

 

 

 

 

 

 

 

 

43

PC

Loose or broken sensor wire

Verify wiring of temperature

 

 

Failure

sensor at sensor and terminal

 

 

 

 

 

 

block of controller

 

 

Process High Temp Fault

44

W

Process heater on

operation

 

 

 

 

 

 

 

Verify heater contactor

 

 

 

 

 

Process cooling valve off

Verify cooling valve operation

 

 

Process High Temp Warning

46

W

Process heater on

operation

 

 

 

 

 

 

 

Verify heater contactor

 

 

 

 

 

Process cooling valve off

Verify cooling valve operation

 

 

Process Low Temp Fault

48

W

Process heater off

operation

 

 

 

 

 

 

 

Verify heater contactor

 

 

 

 

 

Process cooling valve on

Verify cooling valve operation

 

 

Process Low Temp Warning

50

W

Process heater off

operation

 

 

 

 

 

 

 

Verify heater contactor

 

 

 

 

 

Process cooling valve on

Verify cooling valve operation

 

 

 

 

 

Optional process flow switch

Verify operation of flow switch.

 

 

Pump 2 No Flow

52

SC/W

failure

 

 

 

 

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

 

 

 

 

 

Motor circuit protector open

Verify motor circuit protector

 

 

 

 

 

operation. Verify motor wiring

 

 

Pump 2 Overload

53

SC/W

 

 

and amp draw while under load.

 

 

 

 

Verify system valves are

 

 

 

 

 

Pump flow rate in excess of

operational and properly set.

 

 

 

 

 

Contact customer service or

 

 

 

 

 

capacity

 

 

 

 

 

 

 

sales if pump is sized too small

 

 

 

 

 

 

 

for application.

 

 

 

 

 

Heater failure

cooling valve. .

 

 

 

 

 

 

 

Verify operation of heater and

 

 

High Temp Safety Switch

54

PC

 

 

 

 

 

Cooling Valve failure

Verify wiring at cooling valve

 

 

 

 

 

and at terminal bloc

 

 

 

 

 

Sensor failure

Replace sensor if necessary.

 

 

 

 

 

Unit wired incorrectly

Reverse two wires at line-side

 

 

 

 

 

of power switch on electrical

 

 

Phase Monitor Fault

55

SC

 

 

panel.

 

 

Loss of phase during

Verify sensor wiring at sensor

 

 

 

 

 

operation

and at terminal bloc.

 

 

 

 

 

Sensor failure

Replace sensor if necessary.

 

 

 

 

 

Sensor wires loose from

Verify wiring at sensor and at

 

 

From Proc Sensor Failure

56

W

controller terminal block

terminal block. y.

 

 

Sensor wires broke between

Replace sensor if necessar

 

 

 

 

 

sensor and controller terminal

 

 

 

 

 

 

block.

 

 

 

Non-Controller Related Issues

Problem

Possible cause

Solution

 

No power.

 

 

 

Check main disconnect, fuses, wiring,

Unit does not run.

 

and power lead to unit.

Wrong voltage supplied to unit.

Voltage must be within plus or minus

 

 

 

10% of nameplate rating.

GP Series Portable Chillers

Chapter 6: Troubleshooting

55 of 90

Page 55
Image 55
Sterling 882.93092.01 manual Non-Controller Related Issues, Problem Possible cause Solution

882.93092.01 specifications

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