The fire rated roller shutter now sits in most commercial buildings as a passive fire barrier. Small faults show up in daily use, and some you can fix without calling the maker. RHIDOOR gathered the common fire rated shutter faults below so you can diagnose them fast.
Fire Rated Roller Shutter Repairs You Can Do Yourself
Most faults below need a meter and a careful look, not a service visit. Work through them before you book a technician.
Shutter Will Not Work
Start with the power supply. Check whether the shutter’s breaker has power. If not, check the supply side. If it does, the control box power light should show solid green. A dark light means check the transformer in the box (burnt?). A blinking green light means the supply may be missing a phase. If the phase is present, the backup power board may be burnt; or both main and backup boards may be burnt.
Breaker Will Not Stay On
When closing, if the breaker will not push on, check the backup board first. Its output line resistance runs about 300 ohms. If open or shorted, check whether the motor brake is burnt or the backup board is burnt.
Buttons Not Responding
Press stop, then reset, then up or down.
All Lights Lit on the Control Box or Panel
Check whether a button wire is shorted or a button is stuck. If not, the chip on the main board may be bad. Replace the chip. Note the reverse fit — the openings face each other.
Button Only Goes Up or Only Down
Check whether the limit wire has come loose. If not, the main board may be bad.
Buttons Not Working, or Any Button Sends It Down
Check whether the row cable between the main and backup boards is loose.
Add Lock Control
Series a ~1K resistor on pins 5 and 12 of the row cable.
Tell If a Motor Is Good
The three-phase resistance should measure balanced. An imbalance may mean a bad motor.
When the Shutter Alarms
Let it auto-descend to the bottom. Press nothing on the way, then send it up.
Related Articles
- Fire Rated Shutter Control Box: Notes and Wiring
- Repair Methods for Different Roller Shutter Types
- Fire Rated Roller Shutter Fault Q&A
- Quick Repair for a Broken Roller Shutter Spring
If you’re stocking spares or planning an upgrade, we take orders from 1 pc and ship within 15 days, so you keep a backup on hand without locking cash in a big batch.
Ready to upgrade your facility? Let our experts help you find the right RHIDOOR fire rated roller shutter for your site. Contact us today: phone +86 18938501256, WhatsApp wa.me/8618938501256, email ruihua@rhidoor.com.
