719S 2 Door Switching Unit
PD-008 Iss 6
Installation & Operation Manual
Page 9 of 20
Troubleshooting
Test Button
There are two Test buttons on the PCB marked 'TEST 1' and 'TEST 2'. Pressing the
appropriate button will force entrance 1 or 2 into an active state (green LED on, 12V at
the B terminal) for a fixed period (speech active time). Telephone models with ‘privacy
of speech’ (801P, 801PS and BS-LX) must also be buzzed to enable speech. This
feature is provided to assist in fault diagnosis during installation and commissioning.
LED Status Indicators
To assist in testing and fault diagnosis there are 4 LED Indicators on the 719S PCB
which can be interpreted as follows: -
LED 1 (GREEN)
- Speech Active / Call in progress on Door 1
LED 2 (RED)
- Lock Release Active Door 1
LED 3 (GREEN)
- Speech Active / Call in progress on Door 2
LED 4 (RED)
- Lock Release Active Door 2
Problem and Cause
The Voltages below are AC or DC depending on the power supply used.
PROBLEM
COMMON CAUSE AND ACTION
Low speech volume.
'Vol A' or 'Vol B' adjustment required on the
Speech Unit.
Speech Unit is not tight against the panel
grill.
Panel grill is blocked.
Speech Unit supply voltage low. Check
11.5V-15V across 'C' and 'H' on unit.
More than one telephone is off the hook (801
or 801S only).
Constant tone/feedback
when in use.
'Vol A' or 'Vol B' adjustment required on the
Speech Unit.
Missing 'O' connection on the telephone.
Speech Unit is not tight against the panel
grill.
Entrance panel and telephone to close
together.
Reflecting walls surround the entrance panel.
Panel grill is blocked.
Alarm cable has been used.
