Dual-Compressor Module

Troubleshooting

5.0Troubleshooting

This section offers tips for troubleshooting.

5.1Troubleshooting Guide

Refer to Table 4 for recommended solutions to typical problems.

Table 4

Troubleshooting

Problem

 

Recommended Actions

Low Inlet

 

• Closed gas inlet valve.

Gas Pressure

• Restricted or insufficient gas supply.

Fault

 

• Blocked inlet filter/screen (located internally on the Compressor Module inlet block).

 

 

 

 

• Blocked air flow across oil cooler.

High Oil

 

• Ensure cooling fans are operating when the unit is running and up to temperature; at

Temperature

approximately 180°F (82°C), fans should start to run at minimum speed.

Fault

 

• Ensure adequate oil level in first-stage separator (see 4.3 - Checking the Oil Level on

 

 

 

 

page 19).

High Discharge

• Restricted discharge and bypass valve fault.

Pressure Fault

 

VFD Fault

 

• The drive LED will display the specific fault

5.2Motor Winding Resistance

Table 5

Motor winding resistance

 

Compressor

 

 

Model

 

Motor Winding Resistance

C1A and C3A

Phase-to-phase

= 1.2 to 1.4 ohms

C2A

 

Phase-to-phase

= 0.7 ohms

All Compressor

Phase-to-ground

= Infinity

Modules

 

 

 

 

25

2006SSD-75 R4 (10/10)

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Emerson SZO56, SZO44, SZV44, SZV32 manual Troubleshooting Guide, Motor Winding Resistance, Motor winding resistance