The high-speed roller shutter is the most used shutter in industry, logistics, and storage. It makes passage easy and lifts output in industry, logistics, food storage. When it will not start or loses power, what do you do? RHidoor tells you.
Why it will not start and how to fix:
After pressing open, if the industrial high-speed shutter does nothing, the causes vary. Check from these sides:
1. After pressing start, if the PVC high-speed shutter does not turn, cut power and check the lines for faults. If lines are fine, check the motor capacitor; replace a bad run capacitor. If the capacitor is fine, the overheat protection may have failed; replace it.
2. A stuck brake can also stop it. Just pull the chain by hand a few turns to recover. Also, the auto button limit switch normally-closed contact may be open; sand the contact or replace the limit switch.
3. Hardware can cause no start too: damaged, oxidized, or dirty relay coil needs a new relay or contact sanding. The bridge rectifier or electromagnetic coil can fail; a stuck brake stops the door. Replace the rectifier or coil.
4. If all the above check out, the last cause is too-long continuous run tripping thermal protection. Just wait 30 minutes for the motor to cool to room temp, then start. All back to normal.
How to open it with no power:
During use, the shutter may suddenly lose power. How to open it? First see if it has a backup supply. If yes, start it and the door opens easy. If not, go manual. See which type: crank or chain. Different methods.
a. Crank type: find the crank handle, use some force, go to the service hole and pull by hand. Slowly the door opens.
b. Chain type: pull the chain on the motor. Just pull hard; it takes a bit of time.
Note: RHidoor reminds buyers to pick an uninterruptible supply as backup, so blackouts are no worry. For any question, whether or not you bought from RHidoor, our engineers are a call away at +86 18938501256 (ruihua@rhidoor.com). We serve you with care.