HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
Check Furnace
Thermostat scroll message indicating the connected furnace has an active fault requiring service lookup at equipment level
This code typically points to
  • Mirrors active furnace faults such as E0 through E9, d0, d4, b0 through b3, b7, b9
Next checks to confirm
  1. Note thermostat message
  2. Go to furnace board dual 7-segment display
  3. Read exact equipment code
  4. Troubleshoot from furnace manual
Escalation
Service-call state while active equipment fault is present
Reset behavior
Clears when the underlying furnace fault clears.
Urgent
Fix now
Need deeper detail?
Retrieve the subcode for this platform:
  1. For Daikin One+ thermostat: Enter commissioning/advanced menus
  2. Daikin One+: Go to Step 4: System Optimization > Error History
  3. Daikin One+: Review each logged error by date/time, code-equipment pairing, and description
  4. Daikin One+: Where supported, review the minor error code field
  5. Daikin One+: Use Clear Error History when needed
  6. For Goodman ComfortNet board (no Daikin thermostat): From the status menu, depress the right push button once
  7. Goodman ComfortNet: Use left or right button to review fault history
  8. Goodman ComfortNet board: recall last 6 faults from fault-history menu
Source
DC96VC/DM96VC Service Instructions troubleshooting chart, multiple entries on pp.45-48
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