Aiphone LEF Series Installation & Operation Manual page 11

Problem
Solution
5. LED lights don't light up when Station LEDs only light when a sub station calls. A responding master
calling master-to-master. answers handsfree, therefore not having to select a station number.
6. Occupied light is always on. Make sure all masters are in the OFF (standby) position. The station whose
LED above the OFF button is lit is the one that's on,, Check "R" wire for a
short to ground. Take R wire off of unit. If Occupied light remains lit, the unit
is damaged and needs repair.
7. Call tone and LED from subs work Check E and - wires from sub for proper connection to master. See # 2
fine, but no communication, or vice solution above.
versa.
8. When sub calls in, multiple LED Make sure station number wires are not shorted together. F^emove all
lights come on. jumpers between E & Test master station by taking wires off of affected
station #'s, then touch a jumper wire between a station number and negative.
If multiple LEDs light up, the unit has sustained power surge damage and
must be sent in for repair.
9. Door release doesn't work. RY-PA relay is required for each door to be released. Connect black wires to
L & For selective door release, connect RY-PA between K#(matching
station # that door is on) and L, L which provides 12V DC when "key" button
is pressed.
10. All Call from LEF-10S doesn't work. All Call requires the BG-10C Adaptor with PS-12F power supply.
11. Chime from door station doesn't BG-10C must be installed. Wire from door station must connect to BG-10C,
work. "1" of door to DA/DB/DC of BG-10C. Neg. (-) must be connejcted from LEF to
BG-10C.
12. Chime from door works, but Door station should be wired directly to BG-1OC or first master. Make sure
electronic call tone in LEF masters the A/B switch on the back of the LEF master is in the "A" position. Make
also is heard. sure "R" line is connected between LEF master and BG-10C.
13. All Call doesn't work, but BG-10C is Check connection from PI, P2, P3 terminals from LEF-10S to BG-10C. PI
included in system. should be 10V DC or higher when All Call button is engaged. P2 and P3
carry the voice signal from the initiating master to the BG-10C. Be sure to
press TALK while making an All Call announcement, and press All Call
button when finished.
14. All Call pretone and voice volume Adjust volume levels on front panel of BG-10C.
are too loud or too soft.
15. When an All Call is Initiated, all of Make sure jumpers between E & - are removed. When using the BG-10C for
the LEDs corresponding to sub All Call in a system with sub stations, a non polarized capacitor (NP-25V)
station channels light up. must be installed in series on each station # line that a sub staiton is on
between the BG-10C and LEF-10S.
16. Feedback is heard between Intercom stations should not be mounted back to back on the same wall. If
intercom stations in adjacent rooms, they are, they must be installed at least two feet, 60cm apart with insulation
isolating them. Adjust voice volume control downward to eliminate feedback.
17. Communication to another station is Adjust "Voice Vol." upward. Make sure the "1 and terminals from sub to
very weak. master are not reversed.
18. LEF system has AC hum when System wiring must be run at least 20", 50cm away from AC wiring,
listening to another station from a fluorescent lights, or dimmer switches. Wires can cross AC at 90 degrees. If
master station. shielded wire was used, tie ail of the shields together and ground one end to
an earth ground. If noise persists, isolate source of the noise and separate
i
the Intercom from the source.
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