VS-MKII Control System
Chubb Fire & Security Pty Ltd
Technical Manual
Page 33 of 63
2. Maintenance isolate
This switch performs the same function as the “Isolate” link of the MKII module. The switch isolates
the actuation, auxiliary alarm and shutdown outputs from the control module and illuminates the
ISOLATED LED on the display and the audible alarm unit will beep once per minute. All inputs
remain enabled along with the audible alarm unit output, fault output and display panel LED’s. This
switch allows testing of manual release and detection inputs as well as fault conditions without
causing discharge of the system, initiating equipment shutdown or auxiliary alarm outputs (if
configured - see Channel b).
Function
Switch Number
State
Setting
Maintenance Isolate
7
OFF
Normal (default)
ON
Isolated
Table 21 - Display maintenance isolate
3. Shutdown override (bypass)
This switch performs the same function as the “Shutdown bypass” button on the MKII module. The
switch returns the shutdown relay output to a normal condition to allow temporary movement of
equipment after an alarm for safety or maintenance purposes. To initiate, change switch from off
(default) to on then off again. In this condition the audible alarm unit will beep once per minute to
provide audible indication the overridden condition until the panel is reset
.
Function
Switch Number
State
Setting
Shutdown Override
8
OFF
Normal (default)
ON
Overridden
Table 22 - Display shutdown override
Display controls and indicators
Figure 42 - Display controls and indicators