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E59

E59 - Compressor startup failure

Mitsubishi Heavy Industries · Air Conditioners

What does E59 mean?

The remote control displays E59 (while the indoor unit's green LED keeps flashing and red LED stays off). This indicates a failure of the compressor to start properly.

Common Causes

  • Anomalous compressor startup
  • A defective compressor
  • A defective outdoor unit control PCB

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner at the main power breaker, wait for 15-30 minutes, and then turn it back on.

  2. 2

    Ensure there are no external factors like low voltage affecting the compressor's ability to start.

  3. 3

    If the compressor still fails to start, contact a service technician for further diagnosis and potential replacement of the compressor or outdoor unit PCB.

Browse all codes in this manual (110)
Verified technical data. Last updated: April 2026

Related Faults

01Power source faulty — RUN LED OFF, TIMER LED flashes 1 time05Wired remote control wiring error — RUN LED OFF, TIMER LED flashes 5 times35Cooling high pressure control activated — RUN LED flashes 3 times, TIMER LED flashes 5 times
Source: Mitsubishi Heavy Industries Air Conditioners
Open Manual (Page 120)Search more codes in this manual