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5636 / 5637 / 54

Alarm code 54 — Phase sequence incorrect or a phase is missing

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

What does 5636 / 5637 / 54 mean?

The phase sequence is incorrect or a phase is missing, triggering LG error code 54.

Common Causes

  • Incorrect phase sequence
  • Missing power phase

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to separate error handling instructions for Split outdoor unit.

  2. 2

    Verify incoming power connections and phase order.

  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 27)Search more codes in this manual