Fault Code Lookup

HVAC Sales Master
Constant flash / no pause
No demand / standby
This code typically points to
  • No active Y call; normal idle state

Next checks to confirm
  1. Verify thermostat demand and low-voltage call before chasing refrigeration faults

Escalation
None
Reset behavior
Normal standby state.
Informational
No action needed
Source
38TDB Table 5