Step-Hear CALL-HEAR CH-105-F, User Manual, Page: 14 / 76

USING CALL-HEAR
®
For the bell push version Call Unit (CH-100/CH-104)
simply push the bell push.
This will trigger the Call Unit to send a signal to the
Indoor Unit (IDU). While the Call Unit is transmitting a
signal, the LED will light up (red).
When the Indoor Unit (IDU) receives the signal from the
Call Unit, an alarm will be heard and the light at the top
of the unit will flash brightly. This alerts you to the fact
that someone needs assistance. The alarm and flash
will stop after 4 seconds.
The volume of the Indoor Unit’s (IDU) alarm sound can
be controlled by the volume control switch. The alarm
can be switched off using this switch.
If the batteries run low in the Indoor Unit (IDU), the red
LED will flash.
If the batteries run low in the Call Unit– the LED will
flash; replace the 23A battery as follows:
Open the two screw covers and undo the two screws
(the screw covers must be replaced after the battery
has been inserted to ensure that the unit is correctly
water resistant.). Slide the battery compartment cover
open and insert the 23A battery. Ensure correct polarity
is observed. Slide the battery compartment cover back
into position.
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