Battery warnings - MobileKey Locking cylinder (Z4)

A battery management system has been implemented in locking cylinders and transponders which warns the user in good time that the battery capacity is diminished. This prevents the batteries from becoming fully discharged. The individual battery warning levels are described below.

The locking cylinder batteries feature a redundant system. If one of the batteries fails or its capacity falls below a certain level, the system emits a battery warning.

The battery warning levels between G1 and G2 differ after Battery Warning Level 2 if the battery capacity falls under the emergency battery warning threshold values.

Warning Level 1: Low batteries
If the charged capacity falls below 25% in one of the batteries, Battery Warning Level 1 is activated. After you activate the transponder, you will hear eight brief audible signals in rapid succession before the cylinder engages. You must replace the batteries.
Warning Level 2: Extremely low batteries
If the locking cylinder batteries discharge even further, short audible signals are heard in rapid succession for about 30 seconds before the cylinder engages after the transponder is activated. The cylinder does not engage until the audible signals have finished. The batteries should be replaced as quickly as possible.
If this warning level is ignored, the locking cylinder switches to what is known as storage or freeze mode.

Emergency battery – Storage mode (G1 cylinders):
In storage mode, the cylinder can only be opened with the aid of a programming device (SmartCD).

Emergency battery – Freeze mode (G2 cylinders):
In freeze mode, an audible signal will sound if an attempt is made to open using an authorised transponder, but the cylinder will not engage.
The G2 cylinder can now only be opened using a battery replacement transponder or programming device.

Active locking devices: The system administrator can use a G2 battery replacement transponder (freeze mode transponder) for about 30 seconds to eliminate freeze mode and open the door with a user transponder to replace the batteries.
SmartCard locking devices: The system administrator can use a "G2 battery replacement card" (freeze mode card) to permanently eliminate the freeze mode (including warning levels) and open the door to change the batteries using a user identification medium.

NOTE

After using a "G2 battery replacement medium" on locking devices, change the batteries immediately. Otherwise, the locking device may fail completely due to empty batteries.

	WARNING LEVEL 1	WARNING LEVEL 2	FREEZE MODE
Active cylinder:	8 short audible signals before engaging	Eight short audible signals 30 seconds long with one second pause each time before engaging	6 audible signals (long – pause – short)
	Up to 15,000 access events or up to 9 months on standby	Up to 50 access events or up to 30 days	Battery replacement: activate with battery replacement transponder
Cylinder SC (transponder use):	8 short audible signals before engaging	Eight short audible signals 30 seconds long with one second pause each time before engaging	6 audible signals (long – pause – short)
Cylinder SC (SmartCard use):	LED flashes red briefly 8 times before engaging	LED flashes red briefly twice for 30 seconds before engaging	LED flashes red once and blue once
	Up to 300 access events or up to 30 days	Up to 200 access events or up to 20 days	Battery replacement: activate with battery replacement transponder