What basic programming changes are required when replacing an ATV66 with an ATV630 in a Trane unit?

When replacing an ATV66 drive with an ATV630 in a Trane unit, you must update the wiring assignments and key parameters to match the new drive’s configuration. These are the Key Programming and Wiring Changes:

1. Digital Inputs (DI) Reassignment

• Run Forward command:
  • ATV66: LI2 → Run Forward
  • ATV630: Move LI2 wire to DI1 (Run Forward)
• Run Permissive (Enable):
  • ATV66: LI1 → Run Permissive
  • ATV630: Move LI1 wire to DI2 (nSt / Stop)

2. Stop Configuration

• Go to: Complete Settings → Generic Functions → Stop Configuration
• Assign Freewheel Stop to DI2

3. Reverse Command

• Go to: Complete Settings → Command and Reference
• Set Reverse Assignment = NO

4. Analog Input (AI)

• ATV66 had a temperature sensor (resistive type) assigned to AI2. This input is not used on ATV630
• Configure AI1 as Frequency Reference:
  • Path: 5. Complete Settings → 5.5 Command and Reference → Ref Frequency 1 Config = AI1

5. Hand/Auto Switching

• ATV66: LI3 used for Hand/Auto selection
• ATV630:
  • Set DI3 to “Ref 1B Switching”
  • Path: 5. Complete Settings → 5.5 Command and Reference → Ref 1B Switching = DI3

6. Fault Reset

• ATV66: LI4 used for fault reset
• ATV630:
  • Assign DI4 as Fault Reset
  • Path: 5. Complete Settings → 5.12 Error/Warning Handling → Fault Reset → Fault Reset Assign = DI4

These changes ensure that the ATV630 replicates the original ATV66 control logic while aligning with updated parameter structure and input mapping. Always verify wiring and test operation after programming.