Fault Code Lookup

HVAC Sales Master
11
Loss of Communication (Inverter Internal)
This code typically points to
  • Internal inverter communication harness fault
  • Inverter board failure

Next checks to confirm
  1. Inspect inverter internal harnesses
  2. Verify inverter power

Escalation
Internal inverter failure likely if harnesses check good.
Reset behavior
Manual reset via J4 Test pins.
Urgent
Fix now
Source
iQ Drive Table 7