Step1: Disconnect all electrical power at the breaker and check zero voltage before opening the unit.
Step2: Remove the access panel to place the existing micro switch on the actuator path.
Step3: Label and disconnect the SPDT terminals for correct reinstallation.
Step4: Remove mounting screws and take out the old roller lever switch from its bracket.
Step5: Install the new switch in the same position, ensuring the roller aligns with the actuator movement.
Step6: Reconnect wiring securely, restore power, and test door or equipment actuation for proper switching response.