HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
88-27
VFD reprogramming failure
This code typically points to
  • Failed firmware update to VFD
  • Corrupted VFD firmware
Next checks to confirm
  1. Retry firmware update per Carrier/Bryant procedure
  2. Escalate to factory support if reprogramming continues to fail
Escalation
Factory support involvement may be required.
Reset behavior
Clears after successful reprogramming.
Urgent
Fix now
Need deeper detail?
Retrieve the subcode for this platform:
  1. From the main screen, touch Menu
  2. Touch and hold the Service icon for at least 10 seconds until it turns green
  3. Open Service Information
  4. Use View Diagnostics for the most recent fault's top three likely root causes
  5. Use Last 10 System Events for timestamped recent events
  6. Use Run/Fault History for resettable fault counters, cycle counters, and run times
Source
186CNV/284ANV service manual
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