Start-Up and Service Instructions for Carrier 19XRV and 23XRV with Eaton LCX9000 VFD

Quick guide from the manual

This document provides essential start-up and service procedures for Carrier 19XRV and 23XRV centrifugal liquid chillers equipped with Eaton LCX9000 Variable Frequency Drives (VFD). It is intended for trained and qualified service personnel. Key safety requirements include discharging DC bus capacitors for at least 5 minutes before touching internal components and verifying zero voltage with an isolated multimeter.

Safety considerations

Strict adherence to safety protocols is mandatory to prevent severe injury or death:

• Electrical Safety: High voltage is present on motor leads even when the motor is not running. Always lock out and tag electrical circuits before servicing.
• Refrigerant Safety: Never vent refrigerant relief devices indoors. Use only refrigerant or dry nitrogen for leak testing. Avoid skin and eye contact with liquid refrigerant.
• Mechanical Safety: Use appropriate mechanical equipment (hoists, cranes) for lifting heavy components. Do not step on refrigerant lines.

Commissioning the unit

The commissioning procedure must be performed by a certified technician:

1. If stored outdoors, allow 24 hours for temperature stabilization.
2. Enter parameters in the ICVC VFD_CONF screen.
3. Install surge suppression if required.
4. Verify power wiring and grounding.
5. Visually inspect the drive enclosure for corrosion, moisture, or debris.
6. Measure and record incoming line voltages (Vab, Vbc, Vca).

Troubleshooting the drive

The drive displays error codes on the ICVC screen. Alerts indicate a warning condition, while Alarms indicate a shutdown. Faults can be identified using the VFD_HIST screen. Common corrective actions include checking motor loading, verifying cable integrity, and ensuring proper parameter settings in the VFD_CONF screen.

Service and maintenance

Periodic inspection of all valves, fittings, and piping for corrosion or leaks is required. When removing the drive from the enclosure, ensure lifting equipment is properly rated for the specific drive weight (CH72: 198 lb, CH63: 264 lb, CH74: 617 lb). Always close refrigerant cooling isolation valves before disconnecting refrigerant lines.

Technical support

For assistance, contact the Eaton Care HVAC OEM Support Team at 1-800-752-5495 or the dedicated drives tech support at 800-322-4986. Have the Eaton General Order number, Carrier part number, and Eaton serial number ready.