Connecting To Power - AKG WMS400 CU 400 User Instructions

1. Check that the AC mains voltage stated on the included power supply is identical to the AC
mains voltage available where you will use your system. Using the power supply with a differ-
ent AC voltage may damage the unit.
Do not use any power supply other than the AC adapter supplied with the charger.
Never connect the CU 400 charger to the PSU 4000 central power supply because the output
voltage of the PSU 4000 is incompatible with the CU 400.
2. Connect the DC cable of the supplied AC adapter to the DC 5 V jack on the charger rear panel.
3. Connect the AC adapter to a convenient power outlet.
4. The charger is ready to operate. Note that both STATUS LEDs remain dark.
Rechargeable batteries (those included or those you may buy later) are delivered uncharged or
partially charged. Therefore, you will need to charge each new battery before using it.
Each charging slot features a tricolor STATUS LED that indicates the current operating status of the
respective charging slot (">...<" marks an LED flashing in the respective color):
STATUS LED
---
orange
red
green
>red<
1. Check that a rechargeable battery is inside the transmitter battery compartment.
Do not try to charge a dry battery.
If there is no battery inside the battery compartment, do not place the transmitter in a charging slot
before you inserted a rechargeable battery into the transmitter.
2. Make sure to switch the transmitter OFF before placing it in a charging slot.
This is the only way to guarantee optimum charging.
3. Insert the transmitter into the charging slot so that the display on the transmitter faces the LEDs on
the charger. The charger will automatically power the transmitter via the charging contacts.
4. Never switch the transmitter ON during the charging cycle. This may cause the charger to false-
ly indicate a completed charging cycle before charging is actually completed.
If the transmitter has been switched ON by accident during the charging cycle,
1. Remove the transmitter from the charger.
2. Switch the transmitter OFF.
3. Insert the transmitter into the charger.
The charging cycle will start automatically as soon as you insert a transmitter with a rechargeable battery
into the charger.
STATUS LED
orange
red
green
1. You may safely remove the transmitter at any time before the charging cycle is completed.
2. You may safely charge the battery inside the transmitter at any time, even before the battery is com-
pletely discharged.
3. At ambient temperatures above +40°C, the charger may overheat. As a result, the charging cycle may
take considerably longer or stop altogether (STATUS LED flashing red).
As soon as the ambient temperature drops below +40°C, the charging cycle will be resumed auto-
matically (STATUS LED will be lit red).
4. If the battery heats up to more than +60°C during a charging cycle (e.g., due to high ambient tem-
perature), the charging cycle will be stopped automatically (STATUS LED flashing red). Most batteries
will be unusable after being heated up to more than +60°C.
5. Excessive vibrations may cause the charging cycle to be stopped (STATUS LED flashing red), restart-
ed (STATUS LED is lit orange), or appear completed (STATUS LED lit green) ahead of time. Make sure
CU 400
The charger is ready to operate, no transmitter is inserted in the
charging slot.
The battery inside the inserted transmitter is being checked.
The battery is being charged.
The battery is fully charged; the charging cycle is completed.
Error.
The voltage and temperature of the battery are being checked.
The battery is being charged.
Charging time is approx. 1.5 hours for a completely discharged bat-
tery and proportionately less for a partially discharged battery.
Charging two batteries simultaneously will extend the charging time
to 3 to 4 hours.
The battery is fully charged; the charging cycle is completed. The
charger has switched to trickle charging mode.
You may remove the transmitter from the charger.
Due to the charging process, the battery may heat up to +60°C. This
is normal.

3 Connecting to Power

Status
Status
Important!
Important!
Refer to fig. 1.
4 Charging
Important!
4.1 STATUS LEDs
Table 1: STATUS LED indica-
tions
4.2 Inserting a Transmitter
with a Battery Inside
Refer to fig. 2.
Note:
4.3 Charging Cycle
Table 2: Charging cycle
4.4 Important Notes
7