17.1 Error indication
• During normal operation the ERROR LED on the control unit is illuminated.
• An extinguished LED indicates that there is no mains.
• A flashing light on the LED indicates that the operator is out of function (see table below).
• An audible warning signal can be achieved by using the accessory board AIU. It is connected to
the 24 VDC and plugged into the EXU-SA relay output terminal.
RemedyReasonLED flash frequency
Check for short circuit or broken monitored
sensor
+ 24 V DC external error or
sensor monitoring error
One 0.3 s flash, pause etc.
Replace battery (normal operation with mains)Battery defectiveTwo 0.3 s flashes, pause etc.
Replace control unitControl unit defectiveThree 0.3 s flashes, pause etc.
Check the encoder cable.
Open and close the door manually and thereafter
check the automatic function. If the operator is
still out of function replace the drive unit.
Encoder errorFour 0.3 s flashes, pause etc.
Check for e.g. short circuit in the locking deviceLocking device defectiveFive 0.3 s flashes, pause etc.
Replace locking device
Replace EXU-SI boardEXU-SI board defective
Connect the sync cableSync cable not connected or
defective (double door only)
Six 0.3 s flashes, pause etc.
Replace the sync cable
Check the flash frequency on the secondary LED
and take necessary measures in accordance with
this table.
Secondary control unit defect-
ive (double door only)
Seven 0.3 s flashes, pause etc.
Wait for the motor to cool downMotor overheatedEight 0.3 s flashes, pause etc.
Toggle impulseBlocked door and constant
impulse
Nine 0.3 s flashes, pause etc.
1005088-en-22.0Issue 2021-02-2466
17 Troubleshooting
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