Knowledge & Answers

An electronic lift attendant is a system that continuously monitors the safe operating condition of a lift and thus replaces the regular manual checks by an appointed person (the “lift attendant”) required under the German technical rule TRBS 3121. AWM+ permanently monitors, among other things, readiness for operation, door function and the emergency call system, and reports deviations immediately – instead of a snapshot every two weeks.

The AWM+ meets all the requirements for an electronic lift attendant as set out in TRBS 3121 and VDMA Standard Sheet 15319; it is type-tested and certified.

The designated person – commonly called the lift attendant – has always existed. The revised TRBS 3121 of February 2025 defines this role more precisely: it sets out twelve inspection points for the regular check, requires defects to be reported immediately and the lift to be taken out of service in case of a dangerous condition, and demands documented instruction and qualification of the designated person. Only this person may enter the machine room and take a controller out of service. In addition, operators must appoint and instruct trained helpers and release the lift after every emergency rescue.

According to section 3.3.2 of TRBS 3121, the check for obvious defects must in particular verify that

1. access to the shaft, machine room and switchgear is clear and safe,
2. the car cannot start while a landing door is open,
3. a landing door cannot be opened while the car is outside the unlocking zone,
4. the car cannot start while the car door is open,
5. the required levelling accuracy at the landings is maintained,
6. the emergency call system or means of summoning help works,
7. a legible, up-to-date emergency plan is displayed where no emergency service exists,
8. emergency stop switches and protective devices at the car entrances are effective,
9. for cars without car doors, the shaft wall on the entrance side is undamaged,
10. the car lighting works,
11. car and shaft walls and doors are not mechanically damaged, and
12. the lift is used as intended and safely.

With AWM+, the safety-relevant inspection points are monitored electronically and continuously. The complete check of all twelve points is carried out anyway by the maintenance company as the designated person at every maintenance visit; access routes are also covered by the regular safety inspection of the premises.

Yes. TRBS 3121 expressly permits a remote diagnostic system to take over the checks of the designated person in whole or in part. The prerequisite is proof of which tasks the system covers. For AWM+, this proof is provided by the type examination according to TRBS 3121 and VDMA 15319 by TÜV Rheinland.

Under the German technical rule TRBS 3121, a qualified person must check the lift’s proper condition at regular intervals – in practice usually every two weeks. With AWM+, these on-site inspections and the regular training of that person are no longer required, because monitoring is carried out continuously and electronically.

For everyone who bears operator responsibilities for lifts – from a single residential building to a large portfolio: the housing industry, property management companies, facility management and public buildings. From the very first installation, the regular inspection rounds and training are no longer needed; with several installations, the central dashboard and complete documentation across the entire portfolio come on top.

Yes, AWM+ is manufacturer-independent. Depending on the installation, it is connected directly to the lift controller or as a retrofit solution; older existing lifts can be connected as well.

Sensor boxes are installed in addition to the lift – usually on the car roof – and derive statistics from motion and vibration data. AWM+ reads its data directly from the lift controller and therefore knows the actual condition of the installation – faults, door errors, readiness for operation – instead of approximate values. You can find details on our comparison page.

No. AWM+ takes over the duties of the lift attendant under the German technical rule TRBS 3121 and adds real-time fault reporting to your operations. Maintenance by your lift company and the two-way emergency call system remain unchanged – AWM+ works together with both instead of replacing them.

AWM+ detects faults immediately and reports them in the dashboard as well as to everyone involved – operators, service providers and customers. Via interfaces, additional connected systems can be informed, for example tenants through a tenant app or customers through a customer app. This shortens downtimes, and entrapments are detected faster – without waiting for someone to report the fault.

Installation takes an average of 1.5 hours per lift, and the lift largely remains in service during that time. Afterwards, monitoring is active immediately and the dashboard is enabled.

Installation of the AWM+ module takes an average of 1.5 hours and is carried out in close consultation with your maintenance service. The lift can continue to operate during most of the work. Any interruptions will be communicated in advance and kept to a minimum.

The costs consist of a one-off installation and a monthly service fee. We prepare a specific quote on request – depending on the number of installations and the type of connection.

Under Section 2 No. 7 of the German Operating Costs Ordinance (BetrKV), the running costs of lift operation are generally part of the apportionable operating costs; this also applies to the supervision of the installation.

No. AWM+ Connect relies on data from the electronic lift attendant.

AcoBeSmart stores all data on servers in Germany, uses end-to-end encryption and ensures that only authorised persons have access. Compliance with the GDPR is regularly reviewed.