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19 Fault Code

19 Fault Code — OPEX LINK

Carrier · Energy Recovery Ventilators

What does 19 Fault Code mean?

An internal fault has been detected related to communication between the OMIO and OINT boards.

Common Causes

  • Communication-related problem between OMIO and OINT boards

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Contact Carrier support for further troubleshooting and assistance.

  2. 2

    Report the specific fault code and any observed symptoms.

  3. 3

    Ensure the unit is powered off before any inspection if instructed by support.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

1 Fault CodeFault Code 1 — OVERCURRENT10 Fault CodeFault Code 10 — PANEL LOSS11 Fault Code11 Fault Code — ID RUN FAIL
Source: Carrier Energy Recovery Ventilators
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