Problem

Possible cause

 

Plugged Y-Strainer

Pump runs, compressor cycles at

 

Hot gas not coming on

short intervals.

 

 

 

Low water flow

 

 

 

Water/glycol mixture inadequate

 

for process.

 

Defective or improperly set

Water temperature is too high.

High/Low thermostat.

 

Refrigerant low pressure switch is

 

set too high.

 

Refrigerant charge is low.

 

 

Pump pressure low (refer to curves

Pump running in reverse.

for normal pressure for various

 

pumps).

 

 

Check for foreign matter.

Pump pressure is too high.

Restricted water flow.

 

 

 

Restricted condenser air.

 

 

Unit runs continuously, but not

Unit low on refrigerant.

 

 

enough cooling power.

Compressor not operating

 

 

efficiently.

 

 

 

Unit under-sized for application.

Solution

Clean

Replace relay board on control bed hot gas coil

Install bypass between to-and-from process line

Make sure that the water/glycol mixture protection is right for the process.

Adjust or replace.

Call service to adjust pressure control.

Call service to find and repair the leak, then have refrigerant added.

Verify rotation; if running in reverse rotation, reverse any two main power leads. Re-verify for correct pump rotation.

Clean the system.

Check for partially closed valves etc. Make sure that all lines are properly sized.

Clean filters. Clean condenser.

Check the refrigerant charge.

Call service.

Call sales rep.

2-40 HP Portable Chillers

Chapter 6: Troubleshooting

42 of 70

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Sterling A0554831 manual HP Portable Chillers Troubleshooting
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A0554831 specifications

The Sterling A0554831 is a versatile and powerful tool designed for a range of applications, particularly in the industrial and construction sectors. Known for its robust construction and reliability, it has gained popularity among professionals and DIY enthusiasts alike.

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