Huawei storage fan modules and cooling units (26 P/Ns)

A short list where every part is model-specific

This group has 26 part numbers, which is small, and it is small for a reason: a fan module is qualified to an enclosure, not to a product family. There is no such thing as a general-purpose Huawei storage fan. The split here is Assistant cooling module 7, Controller enclosure fan 7, Fan module 5, Disk enclosure fan 5, Fan box 2.

The practical consequence is that a fan cannot be cross-referenced by size or by connector. Two modules with the same frame dimensions can differ in speed curve, in tachometer signalling and in which way the blades are oriented.

Four component types that look alike

The catalogue distinguishes them, and so should you:

• Fan module — a replaceable fan tray for a server or a 2U enclosure, usually hot-swappable.
• Fan box — a framed assembly marked with its airflow direction, used in controller enclosures.
• Controller enclosure fan — matched to a specific controller chassis generation.
• Assistant cooling module — an auxiliary unit used on high-end configurations, not a main fan.

Only the first is a routine field replacement. The others involve opening a chassis that is not designed to be opened in production, and should be treated as service actions.

Airflow direction is printed on the part

Where a fan box is described as front-to-back or back-to-front, that is the direction of air travel through the chassis, and it is part of the part number. Two fan boxes that look identical and differ only in blade orientation will both fit, and one of them will push air against the chassis design. In a fully populated cabinet this shows up as a drive or controller running hotter than its neighbours, not as an immediate failure.

Frame size tells you which chassis, not which part

The 4056 and 8080 codes in the descriptions are fan frame sizes in millimetres. They are a useful first filter and a poor second one: 40.56 mm 3, 80.80 mm 1.

• The same frame size appears in several chassis generations with different speed curves.
• Connector and tachometer wiring differ between generations even at the same frame size.
• Do not substitute a server fan for a storage fan on frame size alone.

High-end configurations add auxiliary cooling

Several rows are marked assistant cooling or auxiliary heat dissipation, and some are marked for high-end only. These are not redundant fans: they are additional cooling units that high-end controller configurations require because the thermal envelope of the populated chassis exceeds what the main fan tray can move. Fitting a standard fan tray where an auxiliary unit is required will let the system run and will let it throttle.

Full part-number list, 26 P/Ns

Descriptions are the official catalogue text. Where a part is restricted to high-end configurations, the description says so.

Before you order a fan

• Identify the chassis the fan goes into, not the system model.
• Confirm airflow direction against the rest of the chassis.
• Check whether the configuration requires an auxiliary cooling unit rather than a fan tray.
• Confirm hot-swap support; not every fan in this list is field-replaceable live.
• Send us the chassis model if the description does not settle it.

Frequently asked questions

Can I use a fan from a different Huawei system?

Not on frame size alone. Speed curve, connector and tachometer signalling are all part of the part.

Why do two identical-looking fans have different part numbers?

Usually airflow direction or the chassis generation they were qualified for.

Is every fan in this list hot-swappable?

No. Fan modules usually are; fan boxes and auxiliary cooling units are service actions.

What is an assistant cooling module?

An auxiliary cooling unit required by high-end controller configurations, not a replacement fan tray.

Does a wrong airflow fan fail immediately?

No, and that is the problem. It creates a hot spot that shows up later as throttling or drive faults.