HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
Indoor 4 flashes (R-454B units)
Refrigerant leak detection indication (R-454B indoor units)
This code typically points to
  • Possible refrigerant leak, sensor problem, or poor connection
Next checks to confirm
  1. Inspect indoor unit
  2. Verify leak detection sensor
  3. Consult Bosch R-454B service procedures
Escalation
A2L refrigerant leak requires mitigation procedure.
Reset behavior
Requires service verification.
Safety Critical
Immediate concern
Need deeper detail?
Retrieve the subcode for this platform:
  1. Connect the IDS system in EasyAir App
  2. Use the contractor view to monitor heat pump health
  3. Review real-time alerts, fault codes, and checkpoint values
  4. For on-site work, use Bluetooth-enabled access to system data and historical fault codes
  5. Calculate superheat/subcool within the app for diagnostic verification
  6. Bluetooth access is retained on-site even without continued remote subscription
Tool required: Bosch EasyAir App
Source
Bosch R-454B FAQ
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