Operating Instructions, Comfort 220.2, 250.2, 252.2, 250.2 speed GB (#83988) 33
10.1 Malfunctions without error messages
Error Cause Solution
LED 8 does not light up. - No voltage. - Check that the mains power supply is operational.
- Check the connection to the mains power supply.
- Thermal overload protection in power
transformer was activated.
- Allow the power transformer to cool down.
- Defective control unit. - Have the operator system checked.
No reaction on impulse. - The connection terminals for the
“impulse” button were by-passed,
e.g. due to a short-circuit or flattened
terminals.
- Try temporarily disconnecting any key switches or interior
push buttons that are connected to the control unit
(Section 6.6): remove the cable from socket XB10, insert
the shorting plug and look for cabling errors.
No reaction on impulse from
hand transmitter.
- Module antenna is not plugged in. - Connect the module antenna to the control unit
(Section 8.1).
- The hand transmitter coding does not
correspond to the receiver coding.
- Activate hand transmitter again (Section 8.4).
- Hand transmitter battery is empty. - Insert new battery (Section 7.1).
- Defective hand transmitter, control
unit electronics or module antenna.
- Have all 3 components checked.
Operator reverses when
the door frame photocell is
interrupted.
- The programming of the photocell in
the door frame area was not
performed correctly.
- Carry out a reset of the control (section 9.4 / level 1 /
menu F8), repeat express programming again (section 8.4).
10. Messages
