Manual Door intercom devices a / b series 20 / 30 / 40 / 50 / 20-0028A/-0028B
Error table
GB
87
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Beeps
Error
Possible causes
3
EEprom error
▸
EEprom is not correctly installed in dedicated base
▸
EEprom faulty
4
Key matrix
error
▸
connected key, configuration button or number keypad is stuck
or faulty
▸
Connection cable for button or number keypad is damaged
▸
Interference
▸
Moisture on board or in connector
5
Busy tone
decoder error
Busy tone decoder is faulty
6
DTMF tone
decoder error
DTMF tone decode component is faulty
7
1kb-EEprom
from V1.30 or
later
Wrong EEprom, only 2kb EEproms are permitted for V1.30 or later
8
Microphone
error
Compact device: the polarity of the connected microphone is
inverted
Universal device: the polarity of the microphone connected to the
integrated MLM is inverted
9
Microphone
error
the polarity of the microphone connected to the MLM-A of an
universal device is inverted
10
Microphone
error
the polarity of the microphone connected to the MLM-B of an
universal device is inverted
11
Microphone
error
the polarity of the microphone connected to the MLM-C of an
universal device is inverted
7.
error taBle
During initialisation, the function of the most important electronics components is verified. If an
error occurs, a sequence of beeps allocated to a particular error will be audible, rather than the
normal high-pitch initialisation beep. You can find the allocations in the following table:
