Warranty on Second-Hand Industrial Electronics: What Is Actu

Warranty on Second-Hand Industrial Electronics: What Is Actually Realistic

Warranty on a pre-owned Mitsubishi FX3U PLC, a refurbished Siemens 6ES7212-1AE40-0XB0 SIMATIC S7-1200 CPU or a used Festo SOOE-MS-R-PNLK-T solenoid valve is not a single number on a page. This desk, an independent industrial automation distributor and sourcing desk, treats warranty as a per-line, per-quote, per-condition disclosure: refurbished units carry a stated per-unit warranty tied to a bench test, used units ship as pulled with the condition photographed before dispatch, and new-surplus lines carry whatever the source channel can evidence in writing. The honest answer differs by line, by condition and by what the channel actually supports.

The question buyers actually ask before paying

Most warranty questions on second-hand electronics come from one of three people: the maintenance engineer buying a single servo amplifier for a machine that will be down at 6 a.m. tomorrow, the panel builder kitting a control cabinet for a customer who is asking for a written warranty in the contract, and the procurement officer at a Russian or CIS plant who needs to justify a non-franchised purchase to a quality system. Each one is asking the same thing in different words: if this part fails in the field, what does the paper actually say? The honest answer is: it depends on which paper you took, what condition the unit was in when the paper was written, and what the source channel can evidence.

The honest answer is also the answer that frustrates buyers who want a single number they can copy into a procurement clause. A blanket warranty would let us compete on a number, but it would also require us to commit to a position that does not reflect how the goods are sourced. A franchised distributor can publish a blanket warranty because every line comes through a single channel with a single contract behind it. This desk sources across multiple channels — surplus, refurbished, broker inventory, last-time-buy — so a single number would either overstate what a used line can support or understate what a refurbished line has earned by its bench test. Either way, the buyer loses information. Buyers searching in Russian, for example «Какие гарантии на б/у компоненты?», get the same per-line answer.

The buyer action is straightforward: send your BOM, list the quantity per line, and note the application and any certification requirements. The quotation that comes back states the condition, the warranty position and the bench-test scope line by line. That is the working document, and the entry point is the inquiry form.

Three condition states, three different warranty positions

The condition labels used on every quotation — new, new surplus, refurbished and used — are not marketing categories. Each one corresponds to a distinct sourcing path and a distinct warranty position. Per-line condition is what makes the quote useful as a working document, and per-line condition is the only way the warranty position can be stated honestly.

New items come from documented channel sourcing and carry whatever warranty the source channel provides in writing. For most of what we sell, this is not the franchised distributor; the warranty travels with what the channel can evidence rather than what a franchised contract would offer.

New surplus items are unused stock from non-franchised channels — factory over-runs, dealer cancellations, integrator liquidations. They carry whatever warranty the channel can document. Where the channel cannot document a warranty, the line is described as new surplus without a warranty claim, and the quote says so.

Refurbished units are bench-tested and the test result is recorded against the unit itself. A refurbished Mitsubishi MR-J4 servo amplifier shipped from this desk carries a stated per-unit warranty, the duration of which is given on the quotation for that specific line. The bench test covers what the unit can be exercised for without the rest of the machine — power-on, diagnostic communication with a known-good programming environment, I/O loopback where the module supports it. The warranty covers what that bench test could have detected. It does not cover weeks of continuous operation in the buyer's specific installation; no bench test can.

Used units are inspected, photographed and shipped as pulled. No test claim is made. No warranty is offered unless the quotation for that specific line states one. The pre-dispatch record exists so that the buyer can compare the condition at the point of dispatch with the condition at receipt, and so that any conversation about the unit can be referred to a specific photograph rather than a generic statement.

Why per-line disclosure is the only honest format

This is why condition is stated per line on the quote rather than summarised at the lot level. A pallet of mixed refurbished and used modules cannot be described by a single warranty statement, because the warranty position differs line by line. A buyer who takes a mixed lot of ten refurbished Mitsubishi FX5-20PG-P positioning modules and five used Yaskawa servo drives has ten warranties that read one way and five that read another, and the quotation is the only place where both positions are visible at once.

It is also why a per-line quotation cannot be replaced by a one-line statement of policy. The whole point of per-line disclosure is that it preserves the granularity the buyer needs to decide whether to commit to a particular line. A blanket statement would collapse that granularity and the buyer would lose the ability to drop or defer the lines whose warranty position does not fit the application.

What "warranty" means on a refurbished Mitsubishi unit from this desk

For a refurbished Mitsubishi FX5-20PG-P positioning module sourced through this desk, the warranty position is a concrete set of items, not a slogan:

The unit is bench-tested at this end before dispatch. The test is recorded against the serial number.
The pre-dispatch photograph shows the unit as it sits on the shelf before packing. Where the module supports it, a short video of the bench-test result is also recorded.
The per-unit warranty period is stated on the quotation line. It is consistent within a single bench-test batch but is not a blanket figure across the whole FX5 family or across all refurbished items.
The warranty covers defects the bench test could have detected. A unit that passes the bench test and fails in the buyer's installation is not covered; the bench test cannot prove the unit works in the buyer's program, I/O map, wiring, ambient conditions or duty cycle.
The warranty is conditional on the pre-dispatch record matching what is received. If the buyer reports a fault, the bench-test record and the photograph are compared with the failure mode.

The same five points apply, with the appropriate differences in scope, to any other refurbished line — a Siemens 6ES7212-1AE40-0XB0 SIMATIC S7-1200 CPU, an Omron E3ZM-T81 2M photoelectric sensor, a Sick ZL2-P2428, a Festo SOOE-MS-R-PNLK-T pneumatic component, or a Phoenix Contact QUINT4-PS/3AC/24DC/20 power supply.

What we do not warranty, and why that is not a defect

Three things are outside our warranty scope by design, and the design is the honest one:

Operation in the buyer's specific machine. A bench test confirms the unit works in isolation; it does not confirm it works in the buyer's installation, with the buyer's program, I/O map and wiring. That decision is the buyer's engineering process and the buyer's responsibility.
Manufacturer-issued warranty. We are an independent distributor and sourcing desk, not an authorised distributor for any of the brands on our catalogue. We do not pass through a manufacturer's warranty because we do not buy from the manufacturer's authorised channel. Where new-surplus stock carries the source channel's own warranty, that warranty is whatever the channel can evidence in writing.
Anything not photographed before dispatch. If the buyer did not request the pre-dispatch record and we did not provide one for a used or refurbished line, the warranty position for that line defaults to as-described at quotation. The photograph is the documentary anchor; without it, the warranty conversation reverts to whatever the buyer can evidence independently.

The pre-dispatch record exists for the warranty claim, not for marketing

The photographs and, where possible, videos of used and refurbished items sent before dispatch are not a courtesy. They are the documentary basis for any later conversation about whether the unit was as described. If a refurbished Mitsubishi module arrives and behaves in a way the bench test could not have detected, the pre-dispatch record tells both sides whether the unit was already faulty at dispatch or failed in the buyer's installation.

This is also why condition is stated per line on the quote rather than per lot. A buyer who orders three Mitsubishi servo amplifiers, two of them refurbished and one of them used, has two warranty positions that read one way and one that reads another, and the quote is the only place where all three are visible at once. The pre-dispatch record, the bench-test record and the per-line warranty term travel together because they are three views of the same line.

What a Mitsubishi, Siemens or Omron buyer can reasonably expect

For a Mitsubishi FX-series PLC sourced through this desk, the realistic expectation is:

New-surplus FX modules: warranty per source channel, stated on the quotation line.
Refurbished FX modules: per-unit warranty, duration stated on quotation, conditional on the pre-dispatch record matching the unit received.
Used FX modules: as-described at quotation, no warranty unless the line states one.

The same three-position disclosure applies to Siemens S7 modules, Omron E3Z and E3ZM sensors, Sick ZL2 sensors, Festo solenoid valves, Phoenix Contact QUINT power supplies and any other line on the catalogue. The condition, the bench-test scope and the source channel differ by line; the structure of the warranty position does not.

For a Mitsubishi FX module that the buyer has already installed and is failing, the pre-dispatch record is what determines whether the unit was already faulty at dispatch. Without that record, the conversation reverts to whether the failure is consistent with a refurbished unit that passed its bench test, which is a much weaker starting position for either side.

When the right answer is a different supplier, not a different warranty

There are cases where the warranty question is a signal that the buyer should be looking elsewhere, and we say so rather than paper over the gap:

If the application is safety-rated (a SIL or PL category, an emergency-stop circuit, a guard-door interlock, a two-hand control), the answer is not a longer warranty — it is a qualified supply chain with documented functional-safety evidence. We do not provide functional-safety qualification and we do not qualify parts for safety circuits.
If the buyer is a medical-device manufacturer subject to ISO 13485 or an equivalent quality system, this desk is not a qualified supplier for that purpose; the right answer is a supplier whose quality system matches the regulatory pathway. We do not hold ISO 13485.
If the buyer needs a manufacturer's warranty to satisfy a contractual flow-down or a regulator's expectation, an independent distributor cannot provide it. We will say so at quote stage rather than after the goods have shipped.

For everything else — a maintenance spare, a pilot-line retrofit, a machine where the part is documented and the engineering team can validate the fit — the per-line, per-condition warranty position described here is the honest one.

How to ask for warranty terms on a quote

The fastest way to get a clear warranty position is to specify, when you send your BOM or the part list, what the part is for. A line marked machine X is down at 6 a.m., need a replacement servo amplifier today is a different conversation from a line marked panel build for customer Y, written warranty terms needed for the quote we send them. Both are valid; they result in different warranty positions because the supply path differs.

Send your list, the quantity per line, the application and any certification requirements. The quotation will state the condition, the warranty position and, for refurbished lines, the bench-test scope. Anything else is conversation rather than commitment, and we will say so at quote stage rather than after the goods have shipped.

For buyers in Russia, the CIS and other regions served on a worldwide basis, the commercial term on the quotation (EXW, FCA, DAP or DDP, as stated on the quotation) sets who handles which step of the journey; the warranty term applies to the unit itself, not to the journey. We screen end users and end uses, classify before quoting, and decline transactions that cannot be screened.

The takeaway

Warranty on second-hand industrial electronics is not a single number. It is the condition stated per line, the bench test recorded against the unit for refurbished items, the pre-dispatch photograph that documents the unit as it left the shelf, and the explicit disclosure that we are an independent distributor and not the manufacturer's authorised channel. If that level of granularity is acceptable — and for most maintenance, retrofit and pilot-line work it is — the per-line position is the one we work to. If a longer or different warranty is required, the right answer is usually a different supplier, not a longer document from us. Send your list with the application noted and our sourcing desk will quote line by line, condition by condition.

FAQ

Does a refurbished industrial part come with a warranty?

Yes, when it is sold as refurbished. The per-unit warranty period is stated on the quotation for that specific line, and it is conditional on the bench test recorded against the unit and the pre-dispatch photograph matching the unit received. The warranty covers defects the bench test could have detected; it does not cover operation in the buyer's specific installation, which only the buyer's engineering process can validate.

What warranty do you give on a used part?

Used parts ship as pulled, with the condition described and photographed before dispatch. No warranty is offered unless the quotation for that specific line states one. The pre-dispatch record exists so the buyer can verify the unit was as described at the point of dispatch, not as a replacement for a warranty.

Can you pass through the manufacturer warranty?

No. We are an independent distributor and sourcing desk, not an authorised distributor for any of the brands on our catalogue. Where new-surplus stock carries the source channel's own warranty, that warranty is whatever the channel can evidence in writing, and it is stated on the quotation line by line rather than aggregated across the order.

How long is the warranty on a refurbished Mitsubishi or Siemens module?

The duration is given on the quotation for the specific line. It is consistent within a single bench-test batch but is not a blanket figure across the whole product family or across all refurbished items on the catalogue. A Mitsubishi FX5 module and a Siemens S7-1200 CPU carry their own stated durations because the bench-test scope and the source channel differ.

What happens if a refurbished part fails in the field?

Raise the reference number and the failure mode with our sourcing desk. The bench-test record and the pre-dispatch photograph are compared against the failure. Where the failure is consistent with a defect the bench test could have detected and the pre-dispatch record matches the unit received, the warranty terms on the quotation apply. Where the failure is consistent with operation in the buyer's installation rather than with a defect at dispatch, the warranty does not apply and we say so.

Is a longer warranty available if I pay more?

Sometimes. The bench-test scope and the source channel determine what the warranty position can be, and a longer warranty on a refurbished item is a real conversation when the supply path supports it. It is not a way to convert a used unit into a refurbished warranty, and it does not create manufacturer-issued coverage we do not hold.

Can I get a written warranty document before I order?

Yes. For refurbished and, where the line warrants it, new-surplus stock, the warranty position is stated on the quotation as a per-line term. A separate warranty certificate is not issued because the warranty travels with the line and the bench-test record; a separate certificate would imply a warranty the line does not in fact carry.

Data Notes

Catalog anchors verified against aoctrl cms-agent (Mitsubishi MR-J4 family, Mitsubishi FX5-20PG-P positioning module, Mitsubishi FX3U PLC family, Siemens 6ES7212-1AE40-0XB0 SIMATIC S7-1200 CPU, Omron E3ZM-T81 2M photoelectric sensor, Sick ZL2-P2428, Festo SOOE-MS-R-PNLK-T, Phoenix Contact QUINT4-PS/3AC/24DC/20). Data through September 2026, methodology grounded in /quality, /terms-of-sale, /procurement, /mitsubishi, /about. By aoctrl sourcing desk, as of September 2026. Independent distributor; not an authorised distributor for any brand on the catalogue.