9
8. Programming and operation
• Set the assigned FS20 receiver into operating mode, following the
operating instructions for this device.
• Now press the doorbell button.
• If the receiver has registered the signal, it will react as described in the
device’s operating instructions.
• Now test the transmission range, whilst continuing to press the doorbell
button.
• Each time you press the doorbell button, the assigned receiver should
react in accordance with its function.
Configuration notes:
The transmitter always sends a power-on command.
The transmitter’s factory set house code is found on the back
of the device ‘FS20 TK’.
9. Battery replacement
The two LR44 (AG-13) button cells will last for up to 10 years, depending
on the amount of use.
If the signal fails to respond despite pressing the doorbell button repeatedly,
the transmitter’s battery set should be changed:
• Working from the side, lever the facing from the catch using a small
screwdriver. Place the device on a flat surface before carefully lifting the
facing off.
Make sure the pressure spring does not fall out.
• Unscrew the four fastening screws on the lid (covering the internal
electronics).