Harmar owner documentation
Count the beeps. The SL600 tells you what is wrong.
The current owner’s manual for the Harmar Pinnacle Premium SL600 stairlift, hosted here so you are not hunting a dealer portal for it. Below is the fault chart, what the armrest light means, and how to get someone off the lift if it stops mid-flight.
Download the owner’s manual (PDF)
20 pages · Harmar · document 76016 rev. H, April 2026
The short version
- Weight capacity350 lb
- Seat swivelUp to 85°, with a latch at 45°
- One short beepHit an obstruction — clear it
- Manual override1/4″ or 7 mm socket, model depending
Why is my SL600 beeping?
Note that three different beeps mean three completely different things, and telling them apart saves you a service call.
One short beep while you are moving
The lift has touched something on the stairs. Clear whatever is in the way and carry on, because nothing has actually failed.
Intermittent beeping while parked at the charge station
The lift is sitting on the charge strip but the power supply is not getting mains power. So check the charger connection, then confirm the outlet is live. This one is worth checking before you call anyone, because a switched outlet or a tripped breaker looks exactly like a dead stairlift.
A repeating pattern of beeps
That is a major fault, and the number of beeps in the pattern identifies it. Count them.
| Beeps | What the lift has detected |
|---|---|
| 1 | Runaway |
| 2 | No power |
| 3 | Footrest up and footrest down switches conflicting |
| 4 | Obstruction up and obstruction down switches conflicting |
| 5 | Footrest down and obstruction up conflicting |
| 6 | Footrest up and obstruction down conflicting |
| 7 | Both stop switches reading as triggered at once |
| 8 | Neither stop switch reading at all |
Meanwhile, codes 3 through 8 are all the same family of problem: two safety switches are telling the controller contradictory things, so it refuses to move. Therefore that is usually a sensor or wiring fault rather than anything you can clear yourself.
One long beep
That is a minor fault, and it clears itself once the cause is gone. The manual lists five: the seat swivelled out of its riding position, the edge safety triggering, a footrest fault, a current overload, and low battery voltage. However, check the seat sits square to the stairs first, because that trips the fault far more often than the other four.
What the light on the armrest is telling you
| Light | Meaning |
|---|---|
| Green | Ready to run in either direction |
| Amber | Touching an obstruction |
| Flashing amber | Parked off the charge strip. Beeps for 30 seconds and repeats every 5 minutes until you move it back |
| Red | Fault. Switch the lift off and back on once; if it stays red it needs a service call |
The flashing amber is a reminder, not a fault. However, if you leave the chair parked mid-rail, it will not charge, and therefore the batteries flatten over a few days. Park it on the charge strip every time and the nagging stops.
If the lift stops with someone on it
There is a manual override that lets you wind the carriage to a landing. Depending on your model it takes either a 1/4″ or a 7 mm socket and wrench, and you will find the instructions on the safety flap underneath the lift itself. However, switch the lift off before you start.
Also, keep the right socket near the stairs rather than in the garage. The one time you need it, you will not want to be hunting for it.
Related pages
In short, the SL600 is our narrow-staircase specialist — see the Pinnacle Premium product page. Its smaller sibling has its own guide: Harmar Pinnacle SL300 manual. The full range is on our stair lifts page.
Stairlift service in Tyler and Waco
Because we are a Harmar dealer, we stock batteries and we service stairlifts across East Texas — including lifts we did not install. So if the chart above has not sorted it, or the light is staying red, call us before it strands someone upstairs.
Looking for a different document? All 114 we keep on file are on the owner manuals page.