Bosch Appliances V1.0 Problem Possible cause Possible solution, Call stations / Wall Control

42 en TroubleshootingPLENA matrix

Problem	Possible cause	Possible solution
Amplifier: Fault light lit for	– This is indicating	–	The amplifier
approx. one second.	protection on that		automatically retries the
	channel (overload or		channel after this time (1
	short condition).		min).
		– Note that the amplifier
			will not detect a short-
			circuit directly without
			signal - for instance, if a
			short is on the output,
			but no signal is being
			driven, the amplifier may
			not actually be in fault
			mode. As soon as
			enough signal is present
			to activate the current
			protection the fault LED
			will light.
Amplifier: Fault LED flashes	– This indicates a thermal	– The channel will be
quickly for around 30	error on the channel.		re‑activated after it has
seconds.			cooled down.
Amplifier: Fault LEDs flash	– This indicates that the	–	Send immediately for
slowly.	PSU has failed (or		service and/or contact
	thermally cut‑out).		the Bosch authorized
			dealer or installer for
			assistance.
Call stations / Wall Control	– RS485 ID cannot be	– Check that the switches
Panel's LED keep rotating.	identified.		have been full switched
			to the appropriate
			positions, and reset
			power to the unit.
		– Check that the CAT‑5
			cable is not damaged in
			anyway.
		–	Download and connect
			with the latest version of
			PC GUI and check the
			RS485 status "Device >
			RS486 device status".

2013-06 V1.0 Operation manual Bosch Security Systems B.V.