Carrier 23XRV Fault Code 44

44
High discharge pressure
Warning
SAFETY WARNING: Commercial chillers contain high-pressure refrigerants and high-voltage electrical components (208V-4160V). Only EPA Section 608 certified technicians should perform diagnostic work. Always follow lockout/tagout procedures and wear appropriate PPE. Do not attempt repairs without proper training and equipment.
AI Summary

Carrier 23XRV Fault Code 44 is a warning alarm indicating: High discharge pressure. The most common causes include Condenser water flow low. Estimated repair time: 1-2 hours. This alarm requires immediate attention by a certified HVAC technician.

Alarm Description

High discharge pressure

Brand: Carrier  |  Model: 23XRV (Variable Speed Screw Chiller (AquaForce))  |  Code: 44  |  Severity: Warning

Observable Symptoms

  • Controller displays alarm code and description
  • Chiller may be locked out or running in degraded mode
  • Alarm indicator light is illuminated on control panel

What to Check First

Before diving into detailed diagnostics, start with this quick first check:

Quick Start: Verify water flow

Probable Causes

  • Condenser water flow low
  • Non-condensables
  • Refrigerant overcharge
  • Condenser fouled

Recommended Inspection Steps

  1. Verify water flow
  2. Vent non-condensables
  3. Verify charge
  4. Clean condenser

Required Tools & Equipment

  • Coil cleaning brush and coil cleaner
  • PT chart for refrigerant type
  • Refrigerant manifold gauge set
  • Safety PPE (gloves, safety glasses, face shield)

Estimated Repair Time

1-2 hours

When to Call a Professional

  • If the fault persists after completing all recommended inspection steps
  • If you observe unusual noises, vibrations, or oil leaks from the compressor
  • If refrigerant charge levels are outside OEM specifications and EPA-certified recovery is needed
  • If electrical measurements show voltage imbalance greater than 2% between phases
  • If the fault recurs immediately after reset, indicating an unresolved safety condition
  • Contact an authorized Carrier service representative for warranty-covered repairs

Related Fault Codes

Other Carrier 23XRV codes that may be related:

17145468

OEM Service Manual Reference

OEM Reference: Carrier 23XRV AquaForce Variable Speed Screw Chiller Service Manual. Available through Carrier Commercial Systems.

Frequently Asked Questions

What does Carrier 23XRV fault code 44 mean?

Fault code 44 on a Carrier 23XRV chiller indicates: High discharge pressure. This is a warning alarm that requires diagnostic attention.

What causes Carrier 23XRV alarm code 44?

Common causes include: Condenser water flow low; Non-condensables; Refrigerant overcharge

How do I fix Carrier 23XRV error code 44?

Follow the recommended inspection steps below. Start with the quick check, then proceed through each step. If the fault persists after all steps, contact an authorized Carrier service representative.

Disclaimer: All lookup data is for reference only. Do not use this information to replace certified professional HVAC technician judgment. Always refer to original OEM official service manual for Carrier 23XRV service procedures.