Guide

What happens at lift commissioning, and what is a buffer test?

Before a new lift carries anyone, it's set up, tested and tuned. Buffer tests are one of the key safety checks. Here's what's involved, with videos from real tests.

By JACO Electrical · Updated 12 November 2026

What commissioning is

Commissioning is the stage between “installed” and “handed over”. The lift's controller and drive are set up, every safety device is checked, and the ride is tuned so the car starts, travels and stops smoothly and levels accurately at each floor. Exactly which tests apply depends on the type of lift and where it is.

Typical checks

  • Electrical checks of the controller, wiring and safety circuits
  • Door operation and door locks at every landing
  • Limit switches at the top and bottom of travel
  • Overspeed and safety-gear checks
  • Buffer tests for the car and the counterweight
  • Ride quality and floor levelling, then handover documents

What a buffer test is

Buffers sit in the pit at the bottom of the shaft, under the car and under the counterweight. If either ever travelled past the bottom of its normal travel, the buffer is there to bring it to a stop. In a buffer test, the car and the counterweight are each run onto their buffers to confirm they stop them as designed.

Sound
Car buffer testThe lift car is run down onto its buffer at the bottom of the shaft.
Sound
Counterweight buffer testThe same check for the counterweight, onto its own buffer.
No sound
From the pitThe view from under the lift as the car comes down during checks.

Videos from Jake's own work. Tap to play; the two buffer tests have sound.

Who does it

Commissioning is done by qualified lift technicians trained on the equipment. Our founder trained with Hitachi, Tresa and Eltec on set-up, testing and commissioning. See our lift services or lift work in Brisbane.

FAQs

Quick answers.

How long does commissioning take?
It depends on the lift, the building and what the tests turn up. It's planned into the install program.
Is a buffer test dangerous?
It's a controlled test carried out by trained technicians, following the procedure for that lift.
Do you commission lifts for other installers?
Yes. Commissioning support and fault finding for lift companies is part of what we do.

Contact

Ask us about it.

Call 0413 501 700 or send the details and we'll get back to you.

  • Phone0413 501 700
  • Email[email protected]
  • Based inTaree, NSW
  • ElectricalTaree, Manning Valley & Mid North Coast
  • LiftsBrisbane, Newcastle, Sydney and everywhere in between

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