[Roller shutter] Inspect the motor this way after install
The motor is the most important part of a roller shutter. After buying and installing, check it by the steps below.
Inspect the motor’s looks:
1. The housing should be complete, with no missing corners, no clear cracks or deformation.
2. Coated surfaces should be smooth, with no clear bubbles, wrinkles, spots, or sags.
3. No flammable or combustible materials should be used in the motor parts.
4. The control device should suit the operator’s use.
Inspect the basic functions:
1. The rated output torque should match the design. The maker should supply a pass certificate.
2. The brake should be safe and reliable. Brake force must be at least 1.5 times the weighted output torque at rated value. Slide travel must not exceed 20 mm.
3. The motor should have a manual device, flexible and reliable, placed for easy reach. Using it to open or close the shutter, no slide or bump.
4. The motor should open and close electrically and let the shutter slide down steadily by its own weight. The electric and gravity speeds should meet 6.4.5. The arm force to start gravity descent should not exceed 70 N.
5. The motor should have auto limit devices. At upper and lower limits it stops by itself. Repeated positioning error under 20 mm.
Inspect the running performance:
1. Mechanical life: under rated torque with weight, cycles should not be under 2000 (one cycle: closed to fully open to fully closed).
2. Noise: no-load running noise under 65 dB.
3. Power: with AC voltage swing within +10% / -15% of rated, the motor should run normally.
4. Safety: insulation resistance of electric parts should be above 20 MΩ in normal air.
5. The live parts to housing should withstand 1760V, 50Hz for 1 min with no breakdown, surface arc, or sweep. After the test, specs should meet A.1.2.
6. Climate stability: the motor should pass the climate tests in table A.1. After, specs should meet A.1.2.