In short. A generator service or AMC enquiry moves fastest when it names the machine, the symptom and the site. Send the nameplate details, running hours, the controller alarm as displayed, the last service date and a note on access and urgency. With that, Reddy Generators can tell you whether the job is a breakdown visit, a scheduled service or an annual contract, and what the scope should contain before anyone commits to a date.
Send your enquiry
Why the first message decides the quality of the response
Most delays in generator service do not happen on site. They happen beforehand, when a technician arrives without the right filters or controller cable, or without knowing that the set sits on a rooftop behind a locked door. Each of those delays traces back to information the customer already had and nobody asked for.
An enquiry is therefore the first engineering step, not an administrative one. It lets us match the technician, tools and parts to the machine, and it lets you receive a scope and estimate that will survive contact with the site.
Three kinds of service enquiry
Breakdown or fault
The set will not start, starts and trips, carries load badly, or shows an alarm. The priority is the exact alarm text, the sequence of events, and whether the site currently has any supply at all. A photo of the controller screen is worth more than a paragraph of description.
Scheduled service
The set is running but is due by hours or by calendar. The priority is the engine and alternator identity, the hours since the last oil change, and the consumables already fitted, so the correct filter and oil grades arrive with the technician.
Annual maintenance contract
You want planned cover for one or more sets over a year. The priority is the list of machines, their duty (standby or prime), their annual hours, and what you expect the contract to include: visits only, visits plus consumables, or visits plus consumables plus breakdown response. See Generator AMC for how we structure contract scope.
Information checklist by enquiry type
| Information | Breakdown | Scheduled service | AMC | Why it matters |
|---|---|---|---|---|
| Nameplate photos (set, engine, alternator) | Essential | Essential | Essential, per set | Fixes make, model, kVA, serial and parts family |
| Controller make and alarm text or photo | Essential | Useful | Useful | Points to the fault and the diagnostic tool needed |
| Running hours and last service date | Useful | Essential | Essential | Sets the service interval and consumable list |
| Duty: standby, prime, hours per month | Useful | Useful | Essential | Decides visit frequency and spares holding |
| Site address, access hours, lifting constraints | Essential | Useful | Essential | Plans travel, permits and equipment |
| Is the load currently without supply? | Essential | Not needed | Not needed | Sets urgency and whether rental backup is needed |
| Photos of the set, fuel tank, battery and panel | Essential | Useful | Useful | Reveals leaks, corrosion, wiring and installation issues |
A diesel set carries three identities: the set builder’s plate with kVA, voltage and set serial; the engine plate with the engine model and serial, which is what filters, injectors and gaskets are ordered against; and the alternator plate with frame size and excitation type, which is what an AVR or bearing problem needs. Photograph all three. If a plate is painted over, photograph the controller’s information screen and any sticker inside the panel door. Whatever the make, the engine serial is the single most useful number you can send.
Describing the symptom so it can be diagnosed remotely
A good fault description follows the sequence of events. For example: the set cranked for about ten seconds, did not fire, and the controller showed a fail-to-start alarm; the batteries were replaced three months ago; the fuel gauge shows half a tank; the set last ran on load two weeks ago during a mains failure. That description already narrows the investigation to fuel delivery or air in the system rather than batteries or starter.
- State what the operator did and what the machine did, in order.
- Quote the alarm exactly as shown, including any code number.
- Say whether the fault repeats every time or only sometimes, and under what load.
- Mention anything that changed recently: a service, a new battery, a fuel delivery, building works, heavy rain.
- Note whether the fault appears only in afternoon heat or during the monsoon.
If the set trips on load rather than failing to start, add the approximate load at the time, whether a large motor or UPS was starting, and whether the trip was on overcurrent, under-frequency, high coolant temperature or low oil pressure. These point in very different directions, as explained in Breakdown Diagnostics.
What an AMC enquiry should settle before signing
An annual maintenance contract is only as good as the scope written into it. In our experience the disputes that arise during the year come from items that were assumed rather than listed. Before asking for a price, decide where you stand on each of the following.
- Number of planned visits per set per year, and whether they are hour-based or calendar-based.
- Whether oil, filters, coolant and belts are included, excluded, or supplied at agreed rates.
- Whether breakdown attendance is included, how many calls, and what response is realistic given the site’s distance from Secunderabad.
- Whether a periodic load test or load-bank test is part of the scope, which matters for standby sets that rarely see real load. See Load-Bank Testing.
- Whether the AMF or ATS panel, batteries and charger are inside the contract or only the engine and alternator.
- What report you receive after each visit: readings, observations, recommendations and the next due date.
A standby set in a Hyderabad office running 60 hours a year needs a different contract from a prime-rated set at a Nalgonda quarry running 2,500 hours a year. Our thinking on intervals is set out in Preventive Maintenance.
Common mistakes
- Sending only the kVA rating and the brand name, which leaves the engine model unknown; the technician then arrives with the wrong filters and a second visit is needed.
- Describing the fault as the generator not working, without the alarm text, which forces a diagnostic visit before a repair visit and doubles the downtime.
- Asking for an AMC price before deciding whether consumables and breakdowns are included, which produces quotations that cannot be compared with each other.
- Forgetting to mention rooftop locations, night-only work windows or permit requirements, which can turn a two-hour job into a two-day one.
- Raising the enquiry only after the set has failed during an outage, when the controller event log had been signalling the problem for weeks.
What to send us
Send clear photos of the set, engine and alternator nameplates, a photo of the controller screen with any alarm visible, the current hour-meter reading, the date and content of the last service, and three or four photos of the installation showing the fuel tank, batteries, panel and surroundings. For a breakdown, add the sequence of events and whether the site is currently without supply. For an AMC, add the list of sets, their duty and the inclusions you expect. Use the enquiry form on this page or write to us through Contact Reddy Generators and we will reply with the scope, the information still needed and the next step.
Questions engineers ask
Do you service generators you did not supply?
Yes. We service diesel sets of all makes, including Cummins, Kirloskar, Mahindra, Perkins, CAT, FG Wilson, Greaves and Eicher powered units. What matters is the engine and alternator identity, which is why the nameplate photos are the first thing we ask for.
How quickly can someone attend a breakdown in Hyderabad?
Attendance depends on the time of day, the site location and the technicians already committed, so we confirm it per call rather than publishing a promise. Sending the alarm photo and site address in the first message is the biggest thing you can do to shorten the response.
What should a standby set’s AMC include if it runs only a few hours a year?
Low-hour standby sets fail from inactivity rather than wear: flat batteries, degraded fuel, stuck injectors and perished hoses. The contract should include battery and charger checks, fuel condition checks, a monthly or quarterly run on load, and at least one annual load test, rather than only the hour-based oil change.
Can you diagnose a fault from the controller alarm alone?
Often we can narrow it to one or two causes. A fail-to-start alarm with good cranking speed points to fuel or air; a slow crank points to batteries or starter; a high-temperature shutdown under load points to cooling, airflow or overload. The site visit then confirms and repairs rather than investigates from zero.
Should the AMF or ATS panel be covered by the same contract as the engine?
We recommend it. A healthy engine that does not transfer the load is still a failed backup. Including the panel brings timer settings, contactor condition, sensing relays and the battery charger into the same inspection schedule.
Technical content reviewed by Srinivas Reddy, Managing Partner, Reddy Generators. Last updated 19 October 2026.