CodeRegistry
Brands
  1. Home
  2. Carrier
  3. Pro-Dialog Control
  4. A1-01
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

A1-01

A1-01 — Maintenance alert: service number nn

Carrier · Pro-Dialog Control

What does A1-01 mean?

The scheduled preventive maintenance date has passed. This is a reminder to perform necessary servicing.

Common Causes

  • Preventive maintenance schedule has expired.
  • Service interval has been reached.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Consult the maintenance schedule or manual for required service tasks.

  2. 2

    Perform the necessary maintenance procedures.

  3. 3

    Reset the maintenance alert through the control panel.

  4. 4

    Log the maintenance performed.

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

Related Faults

CT-01CT-01 — Contactor stuck, circuit ACT-02CT-02 — Contactor stuck, circuit BCT-03CT-03 — Contactor stuck, circuit C
Source: Carrier Pro-Dialog Control
Open Manual (Page 36)Search more codes in this manual