HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
20
Protocol Upgrade Required
This code typically points to
  • Thermostat firmware too old for one of the system devices
Next checks to confirm
  1. Update thermostat firmware
Escalation
Service urgent
Reset behavior
Clears after thermostat firmware is updated.
Urgent
Fix now
Need deeper detail?
Retrieve the subcode for this platform:
  1. On thermostat: Menu > Settings > Advanced Settings > Dealer Control Center > Notifications
  2. Review active alarms on homeowner notification screen or in Dealer Control Center > Notifications
  3. For service-app access, press the smart hub commissioning button once
  4. Connect the mobile device to the smart hub when the LED begins blinking green
  5. Use the app as a service tool after system commissioning is already complete (S30 service session auto-logs out after 30 minutes)
Tool required: iComfort Mobile Setup application for service workflow
Source
Residential Communicating Systems Alert Code Guide, p.8
Look up another codeChange brand