York YK Fault Code E1
York YK Fault Code E1 is a warning alarm indicating: Compressor motor over-temperature. The most common causes include Motor bearing failure. Estimated repair time: 1-2 hours. This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Compressor motor over-temperature
Brand: York | Model: YK (Centrifugal Chiller (Water-Cooled)) | Code: E1 | 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:
Probable Causes
- Motor bearing failure
- Motor cooling insufficient
- High load condition
- Voltage imbalance
Recommended Inspection Steps
- Check motor temperature sensor
- Verify motor cooling
- Measure current and voltage balance
- Inspect motor bearings
Required Tools & Equipment
- Clamp-on ammeter
- Digital multimeter
- Infrared thermometer or calibrated temperature probe
- 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:
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 E1 mean?
Fault code E1 on a York YK chiller indicates: Compressor motor over-temperature. This is a warning alarm that requires diagnostic attention.
What causes York YK alarm code E1?
Common causes include: Motor bearing failure; Motor cooling insufficient; High load condition
How do I fix York YK error code E1?
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.