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5612 / 5613 / 27

Alarm code 27 — Current on IGBT too high, check coil

Bosch · Alarm List A/W Split (8754) 2018 01 10

What does 5612 / 5613 / 27 mean?

A PSC fault has been detected, indicating excessively high current on the IGBT. The outdoor unit will attempt to restart every 3 minutes; repeated errors will block restarts.

Common Causes

  • High current on IGBT
  • Faulty coil

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to separate error handling instructions for Split outdoor unit, error code 27.

  2. 2

    Inspect the coil for damage.

  3. 3

    Contact a qualified technician.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

1001 / A21/A22/A23/A24Alarm A21/A22/A23/A24 — No communication between system controller and remote control1010 / A11Alarm A11 — No communication via EMS BUS connection1037Alarm 1037 — Outdoor temperature sensor faulty, heating standby mode active
Source: Alarm List A/W Split (8754) 2018 01 10
Open Manual (Page 26)Search more codes in this manual