Reviewed by Lukasz Zelezny for the Sigma Elevator range. This page covers Sigma Elevator passenger and goods lifts installed in UK commercial and residential buildings. It is a facilities-manager resource, not a service manual: all work on commercial lifts is engineer-only. Its value is in helping you describe the Sigma Elevator symptom clearly, cite the correct warning message, and cut down the time to first fix.
Quick Diagnosis
Answer up to three questions. We'll point you at the most likely Sigma Elevator fault on this page — full detail stays visible below either way.
Common Sigma Elevator Faults
The sigma elevator lift problems reported most often to UK service desks — expanded in the order owners typically encounter them. Several are resolved by routine Sigma Elevator maintenance rather than a call-out, and the rest are far quicker to fix when you can describe the symptom precisely to whoever handles your Sigma Elevator repair.
Sigma Elevator lift shows Out of Service and won't accept calls
Engineer onlyThe Sigma Elevator commercial lift has fault-locked itself and the car display reads Out of Service.
Most people arriving at Sigma Elevator troubleshooting pages describe the problem in roughly these words. A Sigma Elevator commercial lift showing Out of Service has fault-locked from the controller — an issue the drive.
Brake, door or safety circuit has flagged and refuses to clear without engineer authority. Facilities staff should note the exact wording on the Sigma Elevator display.
The time of day, whether the car is stopped at a floor and level with the sill, and any noise or vibration that preceded the fault.
All of that goes to the Sigma Elevator service desk on first call; nothing on a fault-locked lift is appropriate for building staff to touch.
Do not reset the mains isolator to the Sigma Elevator lift. That clears the controller's own fault log and makes the underlying cause materially harder to trace on the first engineer visit.
Write down what you saw and when. Regular Sigma Elevator servicing catches most of these early, and good Sigma Elevator maintenance notes shorten the engineer's diagnosis.
Sigma Elevator lift doors keep reopening and won't leave the floor
Engineer onlyThe Sigma Elevator car doors close, then reopen without any command and the lift does not depart.
Before you phone anyone about a Sigma Elevator repair, work through the description below. Repeating door-reopen cycles on a Sigma Elevator lift are a safety-edge or light-curtain fault.
The full-height infra-red curtain across the Sigma Elevator car opening detects anything from a shopping trolley left in the doorway to a strip of dust on the vertical lens.
Facilities staff can safely wipe the vertical rails of the Sigma Elevator door opening with a soft cloth, remove any obvious obstruction from the sill, and see if the doors seat cleanly.
If they still reopen, log a call to the Sigma Elevator service line. Do not force the doors closed and do not hold the door-close button.
The reopening behaviour is the safety-edge doing its job and defeating it is not appropriate.
If it becomes a repeat event, treat it as a Sigma Elevator servicing question rather than a one-off Sigma Elevator repair; recurring symptoms usually trace back to a missed maintenance interval.
Sigma Elevator lift stops slightly above or below the floor
Engineer onlyThe Sigma Elevator car floor comes to rest 10–40 mm above or below the landing sill.
This symptom accounts for a steady share of the Sigma Elevator repair enquiries we see each month.
Levelling errors on a Sigma Elevator lift are a trip hazard and must be reported the same day, ideally with the car out of service until an engineer attends.
On modern Sigma Elevator traction lifts the drive re-levels the car automatically once passengers step in or out; when the re-level begins to drift or fails, it points to encoder feedback loss, brake wear, or drive gain adjustment.
On older hydraulic Sigma Elevator fittings. The car sinking below the floor after a load steps out is a valve or seal issue. Building staff should not try any Sigma Elevator isolator reset.
The correct action is to sign the car out of service on the Sigma Elevator lift log and log the fault with the manufacturer's callout time in mind.
Keep the Sigma Elevator maintenance paperwork with the lift. Whoever attends the Sigma Elevator repair will want to see when the last service was done.
Sigma Elevator display shows a warning message
Engineer onlyA status message or warning indicator has appeared on the Sigma Elevator car operating panel display.
This is one of the most common reasons UK owners look up Sigma Elevator troubleshooting in the first place.
Any message on the Sigma Elevator car display beyond the floor indicator and direction arrows is a controller status intended to be read and logged.
The useful discipline for building staff is the same regardless of brand: photograph the display, note the time, note whether the Sigma Elevator lift kept running or stopped, and pass all three to the service desk on the first call.
Do not clear the message by cycling the Sigma Elevator mains isolator. That erases the controller's own log and materially delays the engineer's diagnosis on the next visit.
Repeated instances of the same Sigma Elevator warning within a short window show a component drifting toward failure and should be treated as urgent.
Faults in this family are largely prevented by keeping to the Sigma Elevator servicing schedule, so check the date of your last Sigma Elevator maintenance visit while the paperwork is out.
Sigma Elevator lift alarm rings but the intercom is silent
Engineer onlyPassengers press the alarm on the Sigma Elevator car and get no voice response.
Of every Sigma Elevator troubleshooting question sent to us. This symptom is among the most frequent. Since 2018 every new commercial passenger lift in the UK, including Sigma Elevator fittings.
Has been needed to have two-way voice communication from the car to a 24/7 monitored line.
When the alarm rings on a Sigma Elevator lift and nobody answers, the emergency line is either not configured, the SIM in the Sigma Elevator auto-dialler has expired, or the telecoms line into the machine room is down.
The auto-dialler unit on a Sigma Elevator lift lives in the machine room and needs a monthly test call.
This is a building-owner compliance need and one of the most common items to fail a LOLER report.
Log the fault as urgent; a car with a non-working intercom must not be left in service. Add it to the log. Planned Sigma Elevator maintenance is always cheaper than reactive Sigma Elevator repair.
The log is what turns a vague complaint into a booked servicing job.
Sigma Elevator lift ride is rough or noisy
Engineer onlyThe Sigma Elevator car judders, vibrates or is markedly noisier than usual in travel.
Read this through before booking any Sigma Elevator repair. The answer is often simpler than it looks.
A Sigma Elevator passenger lift developing a rougher ride than normal is a mechanical wear indicator: brake pads glazing, guide-shoe roller wear, rope wear, or bearing noise on the Sigma Elevator traction machine.
Building staff should not diagnose any of these.
The intent of noting the change is to raise it with the Sigma Elevator service contractor at the next planned visit rather than waiting for the ride to degrade to a fault-lock.
Describing the change ("noise now audible from floor 4 upward". "vibration on down travel only") is more useful than a generic complaint.
All mechanical work on the Sigma Elevator lift is engineer-only and off-limits to building staff.
Where the checks do not settle it, describe the symptom in your own words when you ask for Sigma Elevator repair. A plain description helps far more than a guessed diagnosis.
Sigma Elevator repair
A genuine Sigma Elevator repair starts with an accurate description of the fault, not with a part number. Record the error shown on the display or keypad, when it appears, and whether the commercial elevator behaves differently on the way up than on the way down. Engineers quote far more accurately from that detail, and you avoid paying for a diagnostic visit that only repeats what you already know.
Anything behind a cover or panel, in the pit or shaft, or involving doors, gates and interlocks is engineer-only work. Your part of a Sigma Elevator repair is to check and report: mains power on, isolator on, emergency stop out, nothing in the door threshold, and a written note of the fault code.
On a commercial installation, repair also has a paper trail. Log the fault with building management the same day, keep the reference, and make sure the report reaches the company holding the maintenance contract rather than a general facilities inbox.
What Noise Is Your Sigma Elevator Lift Making?
Lifts talk. Not eloquently — but a grind, a beep or an ominous silence each means something. Press play, compare, and pick the closest match.
Example sounds are synthesized approximations to help you compare — not recordings of Sigma Elevator equipment.
Grinding — likely causes on a Sigma Elevator lift
⚠️ Engineer only- Traction sheave or brake pad wear on a geared or gearless machine
- Guide-shoe wear against the rail
- Roller-guide bearing failure
Grinding from a Sigma Elevator passenger lift is never a building-manager job.
Put the lift on Fireman's or Independent service if you can, or place a barrier at the landing, and open a priority ticket with your service company today.
Note the floor at which the noise is worst. Whether it is loudest on the up-run or the down-run. How long the sound has been present.
Do not enter the shaft, the pit or the machine room. Do not try to move the lift by hand. Building maintenance duty here is limited to reporting, barriering and logging.
What Light Is Your Sigma Elevator Lift Showing?
Lifts also talk in light. Pick what you can see.
Steady red — on a Sigma Elevator lift
⚠️ Engineer only- Fault-latched shutdown on the controller
- Fireman's or Independent service engaged and locking the car out
- Door-fault indicator held until service reset
A red lamp that stays on rather than blinking on a Sigma Elevator lift points to an interrupted safety circuit or a fault the controller is holding.
Most of the time the cause is mundane rather than mechanical. Start with the owner-safe checks — watch the car and landing doors close cleanly. Check nothing is holding a door edge.
Confirm no car-stop or emergency switch has been left operated. Where the light clears you can use the lift again once it moves normally. Where it does not, book service.
Leave the isolator alone and describe the indicator precisely when you email.
Is It Safe to Keep Using It?
Three questions. Ten seconds. Answer honestly.
When to Call an Engineer
Owner checks finish where the safety systems start on a Sigma Elevator lift. Call your service provider — or use the form below — if you notice:
- Repeat faults within minutes of each reset.
- Burning smell, smoke, or visible damage to cables or controls.
- Water ingress in the pit, machine area or car.
- A car that has run outside its normal range or landing level.
- Doors, gates or interlocks that behave differently trip to trip.
- Any mechanical fault on a commercial elevator — DIY scope is limited to checking mains power, noting what the display shows, and reporting to building management.
If this lift is in a workplace or managed building, see our LOLER thorough examination guide for the statutory inspection duties that sit alongside repair.
Sigma Elevator servicing
Ask any provider quoting for Sigma Elevator servicing what is actually included: number of visits, whether the alarm and emergency lowering are tested each time, whether batteries and consumables are covered, and what the response time is when something fails between visits. Two quotes at the same price often describe very different contracts.
Keep every service sheet. A dated history of Sigma Elevator servicing tells the next engineer which parts have already been changed, supports any warranty claim, and is the first thing a buyer's surveyor asks for when the property changes hands.
Servicing is not the same as a statutory thorough examination. In a workplace or managed building the two run alongside each other — see our LOLER thorough examination guide for how the duties differ.
About Sigma Elevator
Reviewed by Lukasz Zelezny for the Sigma Elevator range. This page covers Sigma Elevator passenger and goods lifts installed in UK commercial and residential buildings. It is a facilities-manager resource, not a service manual: all work on commercial lifts is engineer-only. Its value is in helping you describe the Sigma Elevator symptom clearly, cite the correct warning message, and cut down the time to first fix.
Lift Troubleshooting is an independent resource and is not affiliated with or endorsed by Sigma Elevator. See our full disclaimer.
Sigma Elevator maintenance
Day-to-day Sigma Elevator maintenance is mostly housekeeping, and all of it is safe from outside the equipment: keep charge points and landings clear, keep the commercial elevator on power rather than isolating it between uses, and keep the door threshold free of grit, rugs and packaging.
Nothing in owner-level Sigma Elevator maintenance involves removing covers, entering the pit or shaft, or adjusting doors, gates or interlocks. If a check cannot be done from the landing with the equipment behaving normally, it belongs to a qualified engineer.
In a managed building, maintenance records and fault reports should sit in the same log. When you report a defect, record who you told, when, and what they said — that log is what proves the equipment was kept in a safe condition.
Frequently Asked Questions
Is my own Sigma Elevator lift covered by this page?
Sigma Elevator equipment appears in UK buildings across the commercial lifts segment. Confirm your exact Sigma Elevator model from the rating plate before quoting anything to an engineer.
The fault behaviour below is written around what these machines share, not around a single model number.
Where does a Sigma Elevator lift show its fault code?
Sigma Elevator indications vary by model and control board. No single code list covers the range. Photograph whatever the Sigma Elevator unit is displaying along with the rating plate, then report both.
Read the sign only — never open a panel or controller to investigate it.
Which Sigma Elevator problem comes up most often?
The fault this page opens with is "Sigma Elevator lift shows Out of Service and won't accept calls". The Sigma Elevator commercial lift has fault-locked itself and the car display reads Out of Service.
The next most reported Sigma Elevator symptom is "Sigma Elevator lift doors keep reopening and won't leave the floor".
Work through the safe checks listed against each one, note what you observe, and pass that to a competent lift engineer.
All on this page stops at check-and-report: nothing here asks the building manager to force a door, move a stalled car, remove a panel or enter a pit or shaft.
Is there an official Sigma Elevator source for fault information?
Ask your maintenance contractor to supply the Sigma Elevator document that covers your fitting. Makers publish service paperwork to registered trade accounts rather than openly.
Treat this page as orientation and the Sigma Elevator manual as the authority.
Who is the dutyholder for a Sigma Elevator lift under LOLER?
For a Sigma Elevator passenger or goods lift in a workplace, the dutyholder is normally the building owner or their appointed managing agent: they arrange thorough examination by a competent person, keep the reports, and act on defects.
Your Sigma Elevator maintenance contractor usually coordinates the inspection. However, the duty does not transfer to them.