63
ED250
08-2018
DL4614-070
dormakaba ED250 IG Installation Instructions
Chapter 19
19.1 Set power fail closing speed
19 Power fail closing speed
1
Power switch
2
Power fail closing
speed potentiometer
3
PCB bracket
assembly
Fig. 19.1.1 Power fail closing speed potentiometer
19.1.1 Power fail closing speed
potentiometer.
• Single turn
• Factory setting: fully CCW
• CCW increases closing speed.
• CW decreases closing speed.
• 3/32" [2-3 mm] flat blade screwdriver
required for adjustment.
19.1.2 Setting door closing speed upon
power failure.
1. Turn ED250 power switch OFF.
2. Manually open door to 90° angle and let
it close.
3. If door closes in less than 3 seconds, turn
potentiometer 1/4 turn CW and retry
test.
TIPS AND RECOMMENDATIONS
Total door closing time from full
open to fully closed should not be
less than 5 seconds.
NOTICE
It is imperative that this door closing
time be set.
If door closes in less than three
seconds, error message
E 73
(System error 3, braking circuit) will
be displayed.
Reference Service manual, Chapter
18, Troubleshooting.
1
2
3