Note
Responding to a Warranty Callback: Triage, Dispatch, Close
A factory maintenance engineer calls. The inverters at a site your team commissioned fourteen months ago are showing a fault code. The factory has not changed anything. They want someone there tomorrow.
Your first question before you promise anything: is this site still under warranty callback coverage, and if so, which type applies?
If you can answer that in two minutes, the rest of the call goes smoothly. If not, you spend twenty minutes on LINE and the phone piecing together when the job closed and what terms were agreed.
Is this site still under warranty?
The basic check is a date comparison: when was the handover signed, and what is the warranty expiry for each obligation?
A 14-month-old site carries different obligations depending on what was agreed:
- A one-year workmanship warranty has already expired
- A two-year equipment warranty from the inverter supplier is still running
- A component warranty on LED drivers or switchgear may carry its own separate expiry
These are three different answers to the same incoming call, and each one points to a different person who may be responsible for the repair.
The goal is to have this visible in under two minutes: site name, handover date, each warranty expiry, and the technician who led the original work. If producing that takes longer, you are making dispatch and billing decisions while the customer waits, with incomplete information.
What kind of fault is it?
Before you dispatch anyone, spend three minutes on the phone asking the customer to describe exactly what they observe. The fault type shapes the warranty question.
A grid over-voltage fault on an inverter is typically a grid-side condition. The equipment supplier may have a view on it, but the installation contractor’s workmanship warranty does not cover how the external grid behaves.
A loose terminal or an incorrectly torqued connection is a workmanship issue regardless of how old the site is. If your team made the connection, the question of warranty expiry is separate from the question of who caused the fault.
An LED driver failure at month 18 on a two-year driver warranty is an equipment claim. The path there runs through the equipment supplier, not through your own labour.
Physical damage to conduit, panels, or equipment that clearly came from factory operations (a forklift impact, a modification made by a third party, equipment run outside its rated conditions) falls outside warranty scope by definition.
The phone triage answers a critical question before the truck moves: is this visit chargeable, covered by workmanship warranty, or an equipment claim the customer takes to the supplier? Getting that answer before dispatch saves a wasted trip and a harder conversation on site.
Running the triage: a worked example
A 250 kWp rooftop solar installation commissioned 14 months ago. One-year workmanship warranty from the contractor, two-year equipment warranty from the inverter supplier.
Customer reports: two inverters showing “grid over-voltage” fault. The system stopped generating 48 hours ago. No changes were made at the site.
The triage:
- Workmanship warranty: expired at 12 months. Not applicable.
- Equipment warranty: active until month 24.
- Fault type: over-voltage protection tripping is the inverter responding correctly to a grid-side event. The inverter is doing its job. The fault clears when grid voltage normalises.
Result: this is not a workmanship defect and not an equipment failure. The inverter manufacturer’s warranty does not cover protection trips caused by grid conditions. This visit is chargeable unless you choose otherwise for commercial reasons.
Tell the customer that before the truck moves. If your technician arrives first and you raise the billing question when they are on site, the conversation is harder and the technician is caught in the middle.
Who do you send, and what do they carry?
Warranty callbacks work best when the responding technician has been to that site before. The site register shows who led the original work. That technician knows the panel locations, the access procedure, and who to call. They start in twenty minutes instead of spending the first hour orienting themselves.
If that technician is unavailable, the site record with installation photos, configuration notes, and access details is the next best preparation.
What they carry on a warranty visit differs from a new installation:
- The original handover photos (to compare against current condition)
- The equipment datasheets and warranty terms for the relevant components
- A job order specific to this visit, separate from the original project record
Keep warranty callback records separate from the original project. Mixing them makes it impossible to see later how many callbacks a site generated, how they resolved, and whether a pattern is emerging.
What does a closed warranty job need?
A warranty callback is a job. It closes the same way any other job closes: photos of the fault observed and the work done, a written record of what was found and what was or was not covered under warranty, and a customer signature confirming the visit and its outcome.
The extra documentation a warranty visit requires:
- A written statement of whether the fault was covered under warranty and the specific reason
- If covered: what was repaired or replaced and at whose cost
- If not covered: the reason stated clearly, in writing, before any chargeable invoice goes out
This protects you if the customer later disagrees about coverage. A signed visit record stating “fault assessed as grid over-voltage event, outside workmanship and equipment warranty scope, chargeable callout agreed on site” is a document. A verbal agreement during the visit is not.
The visit also updates the site’s fault history. The next technician who visits, for an inspection or another callback, can see what occurred and how it resolved.
FAQ
What if the site is just past warranty?
A workmanship warranty that expired last week is expired. The commercial decision is separate: a goodwill visit is your call, and it does not set a precedent unless you say it does. Whatever you decide, document it before the truck moves. A WhatsApp message confirming attendance as goodwill outside warranty is enough.
What if the fault is the factory’s own doing?
Physical damage, a third-party modification, or equipment run outside rated conditions falls outside warranty coverage. Photograph the damage on arrival, before any work starts. The visit record needs to show the condition when your team arrived, not just when they left. That sequence matters if the customer disputes your assessment.
What if the customer insists the fault is covered when you believe it is not?
Document your position in writing before the technician starts any work. An email or WhatsApp message stating your triage assessment and requesting written confirmation of whether to proceed on a chargeable basis gives both parties a record. Starting work without written agreement on whether the visit is billable creates a dispute at invoice time.
A site register with handover dates and warranty expiries, combined with a job-closing process that captures fault history, makes warranty callbacks predictable work rather than reactive scrambles. To see how TRACE 30 puts this in place across your portfolio, visit /program/ or book a short call at /schedule-a-call/.