Important Information; Test Apparatus And Tools; Testing And Trouble-Shooting; Testing The Current Consumption At No-Load - Bosch BML 2410 Repair Instructions

1.

Important Information

These instructions are intended for qualified
electricians. We therefore assume that the
persons performing work on equipment of this
type have knowledge of and comply with the
accident prevention regulation "Electric Units
and Resources" in accordance with VDE-BGV
A2 (VBG4) as well as the regulation "Protec-
tion against Electric Shocks" in accordance
with DIN VDE 0106 or the applicable safety
regulations of the particular country.
Hazardous earthed voltages. Always use an
isolating transformer. Do not connect more
than one device to the isolating transformer.
Keep unauthorised persons away from the
device. Disconnect the device from the supply
voltage before leaving it unattended.
! Risk of injury from device sliding or falling.
Stand the charger horizontally and safely on a firm surface.
Take the weight of devices into account.
Keep work place clean and tidy.
Clear away tools, measuring equipment and cables imme-
diately after use.
After carrying out maintenance work, perform a safety test
with a tester in accordance with DIN VDE 0702, (0701)
Part 1 or in accordance with the applicable safety regulations
of the particular country.
1.1

Test Apparatus and Tools

- Multimeter e.g. Bosch Digital MMD 302 (0 684 500 302) or
another commercially available multimeter.
- Volt-ampere tester ETT 011.00 manufactured by Bosch
(0 684 101 100) or variable multiplier resistor
(load capacity: 500 ... 2000W) and ammeter
(measuring range 0 ... 200 A).
- Adjustable isolating transformer.
- Test battery: 12V / 66 Ah.
- Screwdriver for torx socket bolts (TX 10)
- Tester in accordance with DIN VDE 0702 (0701) Part 1 or in
accordance with the applicable safety regulations of the parti-
cular country
2.

Testing and Trouble-Shooting

When testing, check for loose connections, dirty and corroded
plug connections, and bent or crushed cables.
2.1

Testing the Current Consumption at No-Load

Ensure that the charger is disconnected from all
supply points before opening.
- Open the charger.
- Disconnect plug X6 of the power supply cord from connection
6 of the mains transformer.
- Connect an AC measuring instrument (e.g. MMD 302)
between connection 6 of the mains transformer and the plug X6
of the power supply cord of the charger.
! To prevent damaging the isolating transformer or the
measuring instrument, set the output voltage of the insolating
transformer to 0V.
- Connect the charger to the adjustable insolating transformer.
- Switch on the charger.
- Slowly increase the voltage at the isolating transformer up
to 230 V or until the no-load current of the charger exceeds
200 mA.
The desired value for the no-load current at 230 V~ is:
BML 2410 / BML 2410 FW / 2415
BML 2415 FW
If the no-load current exceeds the desired value either the mains
transformer or printed board is defective. In this case, the charger
must be replaced.
If the current does not flow:
- Disconnect the charger from the isolating transformer.
- Check the mains cable for continuity.
- Check the fuse F1 on the printed board.
- Check the mains switch S1 (on = 2A/3A switched)
- Replace any defective components.
- If the mains cable and fuse are OK and current still does not
flow, either the mains transformer or the printed board is
defective.
In this case, the charger must be replaced.
160 mA ±10%
175 mA ±10%
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