Examples of deteriorated parts
♦ Door hanger
► Abnormal noise generation and rattling
► Door comes off (derailing)
► Increased running resistance puts a burden on the power section and breaks down
♦ Pulley
► Abnormal noise generation
► Shutdown due to damage
♦ Motor
► Abnormal noise generation
► Pulliness of pulley shaft
► Does not work, malfunction
♦ Sensor
► The reaction is slow and does not open
► Repeat opening and closing
► Closes suddenly
♦ Electric lock
♦ Do not open