Is error W02 a fault or a warning?

W02 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.

How do I clear or fix error W02?

1. Check the operating status of the fan.

W02

DEYE inverter error W02

Internal Fan Warning

Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.

SUN SG01HP3/SG02HP3 Hybrid

InverterWarning

Also applies to:SUN-5K-SG01HP3-EU-AM2SUN-6K-SG01HP3-EU-AM2SUN-8K-SG01HP3-EU-AM2SUN-10K-SG01HP3-EU-AM2SUN-12K-SG01HP3-EU-AM2SUN-15K-SG01HP3-EU-AM2SUN-20K-SG01HP3-EU-AM2SUN-25K-SG01HP3-EU-AM2+9

What it means

Internal Fan Warning — FAN_IN_Warn - the inverter's internal fan is operating abnormally.

Cause: The internal fan is running abnormally, or its cable connection inside the inverter is loose or faulty.

How to fix it

Check the operating status of the fan
If the fan is running abnormally, open the cover of the inverter and check the connection of the fan.

Source: 037_BManual_SUN-5_6_8_10_12_15_20_25K-SG01HP3-EU-AM2_20260224_en_9ef2717c.pdf, p.48 · 050_BManual_SUN-29.9_30_35_40_50K-SG01HP3-EU-BM3_4_20260224_en_544e1b2f.pdf, p.49 · 062_BManual__SUN-60_70_75_80K-SG02HP3-EU-EM6_20260224_en_38cbc9f6.pdf, p.49

Frequently asked questions

What does error W02 mean on a DEYE inverter?: W02 means: Internal Fan Warning. The internal fan is running abnormally, or its cable connection inside the inverter is loose or faulty.
Is error W02 a fault or a warning?: W02 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.
How do I clear or fix error W02?: 1. Check the operating status of the fan.

Related error codes

Other codes on the SUN SG01HP3/SG02HP3 Hybrid

All SUN SG01HP3/SG02HP3 Hybrid codes

Prefer the full written guide? Read the complete DEYE inverter error-code guide

Compiled from official DEYE user manuals. Always consult your device manual and a qualified technician before performing repairs.