719S 2 Door Switching Unit
PD-008 Iss 6
Installation & Operation Manual
Page 11 of 20
the time.
connected to 'FAIL SECR' output. If the lock
is a 'fail secure' type it has been connected to
'FAIL SAFE' output. Check to see if the
release is inactive when the lock button is
pressed or try swapping the connections
over.
'EXIT' inputs permanently shorted together.
Check any exit button used is wired for ‘Push
to make’.
Lock operates as soon as
called, short talk time.
Lock button stuck down. Disconnect the ‘Z’
wire (lock button) from the 719S and check.
'Z' and 'O' lines permanently shorted
together. Disconnect the ‘Z’ wire from the
719S and check.
Supply voltage low (less
than 10V, any system
component).
Short circuit. Disconnect power supply loads
and check the output is 11.5V-15V.
Systematically disconnect components one at
a time or isolate floors, etc. until the voltage is
11.5V-15V. Start with connections around the
Switching Unit.
Cable voltage drop too high. Try doubling up
with spare cores. Refer to the CABLE
REQUIREMENTS section.
