Huawei (FusionSolar) · A major brand in the UK. 24 codes across 1 product family, each taken from the manufacturer’s manuals. Huawei technical support ↗
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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.
24 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 2001 | PV string open-circuit voltage exceeds max operating voltage (Major). | Yes | Yes |
| 2002 | PV string power cables arc or are in poor contact (Major). | Yes | Yes |
| 2011 | PV string reversely connected (Major). | Yes | Yes |
| 2021 | AFCI self-check fails (Major). | Yes | Yes |
| 2032 | Power grid outage or AC circuit disconnected / AC breaker OFF (Major). | Yes | Yes |
| 2033 | Grid voltage below threshold or LVRT duration exceeded (Major). | Yes | Yes |
| 2034 | Grid voltage above threshold or HVRT duration exceeded (Major). | Yes | Yes |
| 2036 | Grid frequency above standard (Major). | Yes | Yes |
| 2037 | Grid frequency below standard (Major). | Yes | Yes |
| 2038 | Grid frequency change rate out of standard (Major). | Yes | Yes |
| 2039 | Transient output current above threshold after grid voltage dip or short circuit (Major). | Yes | Yes |
| 2040 | DC component of output current above limit (Major). | Yes | Yes |
| 2051 | Input-side insulation impedance to PE decreases during operation (Major). | Yes | Yes |
| 2062 | PV array short to ground or damp/poor insulation (Major). | Yes | Yes |
| 2063 | Poor ventilation or ambient above limit (Minor). | Partly | Yes |
| 2064 | Unrecoverable fault on an internal circuit (Major); Cause IDs 1-12 (boost short, control circuit, RCD sensor, EEPROM, relay, DC bus...). | Yes | Yes |
| 2065 | Upgrade did not complete / software mismatch (Minor). | Partly | Yes |
| 2067 | Smart power sensor (meter) disconnected (Major). | Partly | Yes |
| 2068 | Battery faulty, disconnected or battery breaker OFF while running (Minor). | Partly | Yes |
| 2070 | Inverter detects islanding during AC outage (Major). | Yes | Yes |
| 2080 | PV/optimizer configuration invalid, reversed or short-circuited (Major). | Yes | Yes |
| 2081 | An optimizer is faulty (Warning). | No | Yes |
| 2082 | Inverter cannot communicate with Smart Backup Box, or backup box circuit fault (Major). | Yes | Yes |
| 61440 | Flash memory insufficient/bad sectors (Minor). | No | Yes |