York YK Fault Code E6

E6
Oil pressure low
Critical
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

York YK Fault Code E6 is a critical safety alarm indicating: Oil pressure low. The most common causes include Oil pump failure. Estimated repair time: 1-2 hours. This alarm requires immediate attention by a certified HVAC technician.

Alarm Description

Oil pressure low

Brand: York  |  Model: YK (Centrifugal Chiller (Water-Cooled))  |  Code: E6  |  Severity: Critical

Observable Symptoms

  • Oil sight glass shows low level or empty
  • Compressor may make unusual noise from lack of lubrication
  • Oil pressure differential alarm may also be active

What to Check First

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

Quick Start: Check oil sight glass

Probable Causes

  • Oil pump failure
  • Oil filter clogged
  • Low oil level
  • Oil pressure regulator fault

Recommended Inspection Steps

  1. Check oil sight glass
  2. Replace filter
  3. Measure pump pressure
  4. Inspect regulator

Required Tools & Equipment

  • Oil level sight glass inspection tool
  • 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 York service representative for warranty-covered repairs

Related Fault Codes

Other York YK codes that may be related:

E1E2E3E4E5

OEM Service Manual Reference

OEM Reference: York YK Centrifugal Chiller Service Manual (Form 160.60-S1). Johnson Controls Technical Literature.

Frequently Asked Questions

What does York YK fault code E6 mean?

Fault code E6 on a York YK chiller indicates: Oil pressure low. This is a critical safety alarm that requires diagnostic attention.

What causes York YK alarm code E6?

Common causes include: Oil pump failure; Oil filter clogged; Low oil level

How do I fix York YK error code E6?

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 York 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 York YK service procedures.