HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
E5
High/low voltage protection
This code typically points to
  • Power supply ≥270V or <172V
  • Control-board issue
Next checks to confirm
  1. Verify supply voltage
  2. Check DC bus condition
Escalation
U** is the limited-condition family tied to this protection state.
Reset behavior
Self-clears when voltage normalizes.
Urgent
Fix now
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 IDS 2.0 service documentation
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