Emerson COPELAND SCROLL SZO22 - Manual (Page 28)

22 2008SSD-34 (5/11)
Single-Compressor Module Maintenance
4.6 Changing the Second-Stage Separator Element
To replace the second-stage separator element:
1. Turn off and isolate the Compressor from all power sources.
2. Turn off the gas supply.
3. Vent the system to 0 psig. Follow applicable safety procedures and codes.
4. Loosen the separator element by turning it counterclockwise with a strap wrench.
5. Remove the separator element. Verify the gasket is removed with the separator.
6. Inspect the separator block for contaminants and remove any debris.
7. Apply a small amount of oil to the gasket and internal "O" ring on the new separator element.
8. Install the element on the separator block; turn clockwise to tighten.
9. Return the Compressor Package to service.
10. Check for leaks at all fittings that have been disturbed
5.0 t
roubleshootiNg
This section offers tips for troubleshooting.
5.1 Troubleshooting Guide
Refer to Table 6 for recommended solutions to typical problems.
Table 4 Troubleshooting
Problem Recommended Actions
Low Inlet
Gas Pressure
Fault
• Closed gas inlet valve.
• Restricted or insufficient gas supply.
• Blocked inlet filter/screen (located internally on the Compressor Module inlet block).
High Oil
Temperature
Fault
• 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 - Oil Service on page 19).
High Discharge
Pressure Fault
• Restricted discharge and bypass valve fault.
VFD Fault • The drive LED will display the specific fault (see Table 7).
Table 5 VFD fault codes and descriptions
Code Description
UU Insufficient voltage
OU Excessive voltage
OI.AC Excessive motor current (instantaneous condition)
It.AC Excessive motor current (overload condition)
Oh1, Oh2 Excessive heat sink temperature
Ph Loss of AC supply phase