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62

Error 62 (6 Green, 2 Red Flashes) — Outdoor unit main PCB error

Fujitsu · Air to Water Heat Pumps

What does 62 mean?

The hydraulic unit's green LED flashes six times and the red LED flashes twice. This indicates a fault with the main Printed Circuit Board (PCB) in the outdoor unit.

Common Causes

  • Component failure on the outdoor unit's main PCB.
  • Power surge or electrical fault damaging the PCB.
  • Software or firmware issue requiring a reset or update.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power cycle the entire heat pump system by turning off the main breaker for 60 seconds, then switching it back on.

  2. 2

    Check for any obvious loose connections or signs of burning around the outdoor unit's main PCB (only if you are a qualified technician).

  3. 3

    Ensure the power supply to the outdoor unit is stable and free from voltage fluctuations.

  4. 4

    If the error persists, it is highly likely that the main PCB needs to be replaced by a qualified service technician.

  5. 5

    Avoid attempting to repair the PCB yourself, as this can cause further damage or personal injury.

Browse all codes in this manual (59)
Verified technical data. Last updated: April 2026

Related Faults

1 Flash (Outdoor Unit)Outdoor Unit LED 1 Flash — Serial forward transfer error10Fault 10 — Outdoor sensor error11Error 11 (1 Green, 1 Red Flash) — Communication error between Hydraulic and Outdoor unit
Source: Fujitsu Air to Water Heat Pumps
Open Manual (Page 6)Search more codes in this manual