Table 25 - RS485 Bus Problems
Fault Description Solution
DEVICE FAIL xxx
xxx = ROX
xxx = RIX
xxx = Kpd
xxx = Trd
xxx = Pnl
Wired Device on the RS485 bus has been lost.
Each Device is recognised by its own name such
as the following:
Output expander = ROX
Input expander= RIX
Keypad = Kpd Reader = Trd
Control panel = Pnl
Identify device.
Check device addressed correctly to match
programming.
Check connections at device, and cabling to it. If
above correct, re-boot device, followed by
reboot of End Station.
485/COMMS LOST Displayed on keypad that has not yet
established communications with the control
panel (End Station).
Part of routine initialisation procedure.
If persists, check display at other keypad(s) to
confirm if device failure is at keypad or complete
system BUS failure.
Temporarily install additional keypad.
Keypad display is
blank
Keypad address does not match any keypad
enabled in the panel.
Check keypad address by pressing and holding
d until the security code is required. Enter 2000
and set the keypad address. The primary keypad
address MUST be always set to [00]. Make sure
in the Install Keypads and Readers menu in
Engineer mode that the keypad address set up
correctly.
Keys locked out a) More than one device connected at the same
address.
b) Too many incorrect key presses have been
entered to create Code Guessing condition.
a) Correct addressing so that no overlaps. Then
power system down and up again to correctly
reinitialise.
b) Wait 120 seconds for keypad to be
reintroduced onto the system.
Table 26 - Detection Faults
Fault Description Solution
BELL TAMPER Tamper fault detected on connection from SAB Ensure terminal TR is at or near 0V. If not, check
that the Bell Tamper switch is closed. Ensure fuse
F1 is intact, and check the connections to SAB.
CASE TAMPER Case tamper switch open Ensure the switch is closed.
Code Guessing Up to 13 Invalid key presses have been entered
or 3 invalid tags have been presented.
After 120 seconds the keypad will unlock, then
enter a valid code.
Table 27 - Power Supply Problems
Fault Description Solution
BATTERY FAULT xxx Battery not present or Battery volts low This indication should be expected during
recharge after a mains failure.
BAT LOAD FAIL Battery Load Test has failed Only displays if option selected. Battery
uncharged or capacity below specification may
need replacing.
BAT CRITICAL Battery being disconnected Protects battery from deep discharge damage
during extended mains failure.
The system is about to be powered down.
PS O/P FAULT xxx Power issue on a powered output expander Check all the fuses and the battery in the
powered output expander.
PCX Installation Guide 102017852 - V01 77
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