The fire-rated roller shutter is now one of the most used fire products in daily life. Small problems can come up in use. Some you can fix yourself without calling the maker. RHidoor has gathered common faults for reference.
Shutter will not work:
First check the power. See if the shutter’s breaker has power. If not, check the power side. If it does, the control box power light should be solid green. If the light is off, check the transformer in the box (burnt?). If the light blinks green, the power may be missing a phase. If not missing a phase, 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, first check the backup board. Its output line resistance is about 300 ohms. If open or shorted, check if the motor brake is burnt, or if the backup board is burnt.
Buttons not responding:
Press stop first, then reset, then up/down.
All lights on the control box or button panel lit:
First check if 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 (openings face each other).
Button only goes up or only down:
Check if the limit wire has come loose. If not, the main board may be bad.
Buttons not working, or any button sends it down:
First check if the row cable between main and backup boards is loose.
Add lock control:
Just series a ~1K resistor on pins 5 and 12 of the row cable.
Tell if a motor is good:
The three-phase resistance is measurable and balanced. Imbalance may mean a bad motor.
When the shutter alarms, let it auto-descend to the bottom, press nothing on the way, then go up.