Tips and tricks

EWA 10 – EWA 16 / EZW 64

Drive not running:

  • Check power supply directly on drive unit.
  • Check limit switch setting and adjust if necessary.
  • Check motor connection: Tighten down contacts.
  • Check motor protection switch, check setting (refer to type plate for nominal current).
  • On drives with single-phase motors, the temperature monitoring function (WSK) on the motor may have responded / tripped: Give the motor time to cool down.

Run across the limit position:

  • Check rotational field.
  • Check that actuator rings are firmly seated and that limit switches are set correctly.
  • Check electrical switch function of switches HI and HII, and if necessary also for additional switches SI and SII.
  • Limit switch roller must not be tilted, see assembly instructions, Point 10.3.
  • Check switch function of control unit.
  • You will find an END 20 animation on our homepage.

Oil loss

  • Check assembly position of bleed screw.

RMA 20

Drive only rotates in one direction

  • Line N swapped with line L.
  • WSK coil protection contact activated (standby mode).

LSR 20

No temperature reading on display panel

  • Check power supply at ventilation controller.
  • Check fuses.
  • Check temperature sensor (see operating instructions, Annex B).
  • Temperature sensor connected?

Position of ventilation does not match parameter in operating menu 1

  • Check run-time recording function, and run it if necessary (see operating instructions 8.2).

Ventilation fails to open completely

  • Check Max. limit position.

Ventilation fails to close completely during rainfall

  • Check Min. limit position.

Ventilation fails to close during rainfall

  • Check rain sensor.

For other faults, refer to Annex A of operating instructions.


LSR 05

No temperature reading on display panel

  • Check power supply at ventilation controller.
  • Check fuses.
  • Check temperature sensor (see operating instructions 7.2).
  • Temperature sensor connected?

Ventilation fails to close during rainfall

  • Check rain sensor.

Rack and pinion units and gear units

  • Use the special lubricant specified by the manufacturer.
  • Depending on application, lubricate rack at least once a year.
  • ZSG clamping ring tightening torque 25 Nm.

All the work described must be carried out by skilled and trained personnel. Skilled and trained personnel‘ are people whose education, experience and training (e.g. installation fitters certified by Lock) as well as knowledge of applicable standards and stipulations, work safety specifications and on-site conditions at the company authorize them to be responsible for the safety of the system, to carry out the activities required in each case and, in that process, to identify and to be able to prevent potential hazards.