2
TROUBLESHOOTING
If the system fails to operate as required, review operating
instructions again. If the equipment fails to operate as
indicated in the instructions, check the following points:
1
. ENTIRE SYSTEM DEAD:
Check 16VAC at transformer
secondary; wiring between transformer and NH201TVA
or NH201TT amplifier; connections at amplifier terminals
and for 117 VAC at transformer primary.
2. NO CALL UP BUZZER AT HANDSET:
Check for
approx. 16VAC at terminals 'II' and 'S' on handset, when
entry station pushbutton is depressed. Temporarily switch
handset with one from a functioning location. Check
wiring connections at remote handset. Check that wiring
inside handset base is not restricting movement of buzzer
clapper; temporarily switch handset to another location
that is functioning, and try again. Check that entry station
pushbutton is making contact, by shorting out the two (2)
wires on the back of the button.
3. NO VOICE ON SYSTEM:
Check volume control (poten-
tiometer) on NH201TVA (or NH201TT) amplifier (in both
directions; up and down). Check terminals 'I' and 'II' to
handsets. Check speaker/microphone connections at each
entry door station. Disconnect terminals 'I' and 'II' on
NH201TVA (or NH201TT) system amplifier, and con-
nect a single handset to those terminals. If voice is
working, amplifier and entry speaker/microphone are
O.K., so check riser wiring. If not, amplifier or speaker/
microphone could be faulty. Check by replacement.
4. UNABLE TO RELEASE DOOR STRIKE:
Check wiring
to handset terminals 'I' and 'II'. Temporarily remove door
opener wire going to amplifier terminal 'II' and touch to
terminal 'O' on amplifier. Check operating voltage of door
opener matches output from system amplifier. Check
wiring (and gauge) to door opener, from amplifier/power
supply. When using a magnetic type lock or other 'fail-
safe' type door lock, you should use a reversing relay,
such as our model# PK407A for each entrance.
5. HUM OR BUZZ:
Check system wiring installed too close
to power wiring or electrical devices or transformers;
check transformer(s) installed too close to control equip-
ment (should be at least three (3) feet away). Wiring is
being run next to wiring for other systems and/or devices.
6. SQUEALING OR HOWLING:
Check amplifier volume
control set too high; check for loose speaker/microphone
at door entry station(s).
7. UNABLE TO TALK TO DOOR STATION:
Check
terminals 'I' and 'II' going from handsets to amplifier for
continuity and shorts, grounds, etc. Check for proper
functioning of door entry station speaker. Check for
DOOR OPENER
1. Connect one wire coming from door opener to amplifier
terminal '8'.
2. Connect one wire coming from door opener to amplifier
terminal 'O'.
NOTE: use proper gauge wiring to door opener.
NOTE: POLARITY OF AC TYPE DOOR OPENER
TERMINALS IS NOT CRITICAL.
FINISH INSTALLATION
1. Install stations on housings. Do not overtighten screws.
2. Install amplifier and accessory devices as needed.
3. Plug SS105B transformer into outlet. If SS106 trans-
former is used, connect primary to 117 VAC. Observe
all local and national electrical codes.
TEST AND CHECKOUT
1. At all inside handset stations, make sure the handsets are
hung-up and seated properly on the cradle switch, and
that no wires were 'pinched' when handset covers were
affixed.
2. Check each unit in the system for operation in accor-
dance with the operating instructions.
3. If feedback occurs between stations, reduce volume.
Amplifier volume control is preset at the factory, but may
be readjusted, if necessary.
NOTE: The Alpha Communications
®
warranty is void if this
system is installed or used in any manner other than described
in this manual.
OPERATING INSTRUCTIONS
OUTSIDE DOOR STATION
TO CALL HANDSET:
Push button on outside door station
to signal inside handset. An electric buzzer will be heard at the
inside handset station. If the electric buzzer has been replaced
by the optional model R2007 AlphaTone™ unit, an electronic
chime sound will be heard at the handset station.
INSIDE HANDSET STATIONS
TO REPLY
: Lift the inside handset off of its cradle and
speak in a normal voice. Conversation is full duplex type
(simultaneous talk and listen). If satisfied with the identity of
the caller, you may depress the 'Key Symbol' push-button to
electrically open the entrance door (if so equipped). An AC
type door opener will 'buzz' while operating, indicating permis-
sion to enter. When conversation is completed, hang-up
handset on its cradle.
