Service manual

4801-5159 Rev 01-2015 Technical Installation and Service Manual Page 21
13 SC-235 & SC-650 Drive Diagnostics LEDs
KB Drive Diagnostic LEDs
Door Idle
PWR LED ST LED Operating Condition Possible Causes
OFF OFF Drive is Off
No AC Power Applied
Fuse Blown
Defective Drive
Green Steady Yellow Normal Condition
Green Quick Flash
Red/Yellow
AC Input Under
voltage
Input AC=115 VAC/Drive Jumper set on
230 VAC
Green Slow Flash
Red/Yellow
AC Input Overvoltage Input AC=230 VAC/Drive Jumper set on
115 VAC
Green Steady Red Current Overload
Drive tripped due to current overload
Green Red/Yellow/Green Under voltage or
Overvoltage
Drive tripped due to out of range voltage
condition
Door Moving
PWR LED ST LED Operating Condition Possible Causes
Green Slow Flash Green Normal Condition
Green Quick Flash Red Overcurrent
Drive operating at 120%-200% of full rated
load
Green Slow Flash Red Short Circuit Two phases may be shorted
Phase may be shorted to ground
Gear motor may be defective
Status
LED
Slow Flash = LED flashes 1 second off, 1 second on
Quick Flash = LED flashes 0.25 second off,
0.25 second on
Steady = LED is constantly on