T Roubleshooting; Troubleshooting Guide; Motor Winding Resistance; Table 4 Troubleshooting - Emerson Copeland Scroll SZV32 Installation, Operation & Maintenance Manual

Dual-Compressor Module
5.0 t
roubleshootiNg
This section offers tips for troubleshooting.
5.1

Troubleshooting Guide

Refer to Table 4 for recommended solutions to typical problems.
Table 4 Troubleshooting
Problem
Low Inlet
Gas Pressure
Fault
High Oil
Temperature
Fault
High Discharge
Pressure Fault
VFD Fault
5.2

Motor Winding Resistance

Table 5 Motor winding resistance
Compressor
Model
C1A and C3A
C2A
All Compressor
Modules
Recommended Actions
• Closed gas inlet valve.
• Restricted or insufficient gas supply.
• Blocked inlet filter/screen (located internally on the Compressor Module inlet block).
• Blocked air flow across oil cooler.
• Ensure cooling fans are operating when the unit is running and up to temperature; at
approximately 180°F (82°C), fans should start to run at minimum speed.
• Ensure adequate oil level in first-stage separator (see 4.3 - Checking the Oil Level on
page 19).
• Restricted discharge and bypass valve fault.
• The drive LED will display the specific fault
Motor Winding Resistance
Phase-to-phase = 1.2 to 1.4 ohms
= 0.7 ohms
Phase-to-phase
Phase-to-ground = Infinity
25
Troubleshooting
2006SSD-75 R4 (10/10)