Nidec's 3.2MW AI cooler is on schedule; its audit is not
Nidec announced a 3.2MW in-row cooler for 800-volt AI racks the same week its auditor declined to sign its accounts and Tokyo's exchange began a listing review. The product ramp and the accounting clearance now run on different clocks, and the second one prices the stock.
Richard Tang · 3 min read
On October 27 Nidec−2.17% — Nidec, down 2.17 percent today announced two things, and only one of them was finished 1. The finished one is the NIR3.0, an in-row coolant distribution unit rated at 3.2MW for 800-volt direct current AI racks, with mass production targeted for the first half of 2027 1. The unfinished one is the company around it: auditor PwC Japan told Nidec it cannot complete the audit of its annual securities report in time, no unqualified opinion has been issued, and a Tokyo Stock Exchange listing review lies ahead 2.
The same day, the board decided to sue founder Shigenobu Nagamori and eight other former executives for damages over the suspected accounting irregularities 3, after its own outside-lawyer committee put responsibility on them 4. The product is on schedule; the clearance is not. That gap should size any position in the stock, or any order from a data-center buyer.
The product spec is the easy half
On the spec, the NIR3.0 fits where AI racks are heading: liquid cooling delivered at row scale, built for the 800VDC standard, and rated for a 3.2MW draw that smaller in-row units were not sized to carry; Nidec says the high-voltage direct current design cuts conversion and transmission losses and can help the site's power efficiency 1.
What the announcement does not carry is the demand half. That operators building in 2027 will commit to this supplier is the inference, not a disclosed fact: an announcement is not a design win, and a design win is not revenue 5. Those votes belong to hyperscale operators, who now must weigh a supplier whose accounts for the years ended March 2025 and March 2026 carry a disclaimer of opinion 5.
The gate is accounting, and it is undated
As of September 30, audit procedures still ran through 77 people spread across about 50 sites 6. Nidec had set October 28 as its target to file amended reports with an auditor's opinion and missed it; it expects to finish its part of the additional checks in November, but says that does not tell when the audit completes or when the amended reports are filed 5.
CEO Michio Kaida said systems and mechanisms are in place, but the issues the auditor raised about how they work in practice remain unresolved 5. The bill underneath is visible: up to $70.7 million of additional US customs duties, declared to US Customs by August, most of it traced to seven US sites 7.
The exchange's review sets the clock
One year after the shares were designated Security on Special Alert, Nidec filed the written confirmation of its internal management system on October 30 8. The exchange can lift the designation, keep it, or delist the shares, and past reviews have generally produced a result within two to three months 5.
For an operator ordering cooling for a 2027 build, the unit is the right product shape; the risk sits in the delivery and service commitments, which should be sized against an auditor's report that does not yet exist. For an investor, the cooling ramp and the audit resolve on different clocks, and the dates that size the position, the exchange's ruling and PwC's signature, are not yet dates at all.
A second clock opened on October 30
Japan's accounting institute, the JICPA, opened an investigation into how the audit of an industrial electronic equipment maker was conducted 9. Its release named no firm, but Nikkei and Kyodo reported the same day that the firm under examination is PwC Japan 10.
The people working in the gap between capability and clearance are PwC's auditors and Nidec's rebuilt accounting staff; until that work finishes, the cooling story is priced ahead of the evidence. What moves this stock next is a signature: PwC's on the amended accounts, then the exchange's ruling on the listing.
Get Data Center by email, free
Who is building AI's data centers, and who is paying for them. In our daily email, every weekday.
