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Bit9: 1-Fault

Fault Word 6, Bit 9 — Ckt2 BPHE anti-freeze protect

York · Air-Cooled Chillers

What does Bit9: 1-Fault mean?

The anti-freeze protection for the Brazed Plate Heat Exchanger (BPHE) in Circuit 2 has been activated.

Common Causes

  • Low water flow through Circuit 2 BPHE
  • Ambient temperature too low for Circuit 2 BPHE
  • Incorrect anti-freeze settings for Circuit 2

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm sufficient water flow through the Circuit 2 BPHE.

  2. 2

    Ensure ambient conditions are suitable for operation.

  3. 3

    Review and correct anti-freeze protection settings.

  4. 4

    Seek professional assistance if needed.

Browse all codes in this manual (23)
Verified technical data. Last updated: April 2026

Related Faults

1b Bit15: 1-FaultFault Word 2, Bit 15 — Ckt1 LPT fault2b Bit15: 1-FaultFault Word 2, Bit 15 — Ckt2 LPT fault3b Bit15: 1-FaultFault Word 2, Bit 15 — Ckt1 HPT fault
Source: York Air-Cooled Chillers
Open Manual (Page 134)Search more codes in this manual