Operation; Maintenance And Service - Bosch Professional GAL 12V-20 Manual

OBJ_BUCH-3476-001.book Page 5 Tuesday, December 12, 2017 12:08 PM
Technical Data
Battery Charger
Article number
Battery charging voltage (automatic
voltage detection)
Charging current
Allowable charging temperature
range
Charging time for battery capacity,
approx.
– 1.5 Ah
– 2.0 Ah
– 3.0 Ah
– 6.0 Ah
Number of battery cells
Weight according to EPTA-
Procedure 01:2014
Protection class

Operation

Starting Operation
 Observe the mains voltage! The voltage of the power
supply must correspond with the data given on the name-
plate of the battery charger. Battery chargers marked with
230 V can also be operated with 220 V.
Charging Procedure
The charging procedure starts as soon as the mains plug of
the battery charger is plugged into the socket outlet and the
battery 1 is inserted into the charging compartment 3.
Due to the intelligent charging method, the charging condi-
tion of the battery is automatically detected and the battery is
charged with the optimum charging current, depending on
battery temperature and voltage.
This gives longer life to the battery and always leaves it fully
charged when kept in the charger for storage.
Note: The charging procedure is only possible when the bat-
tery temperature is within the allowable charging tempera-
ture range, see "Technical Data" section.
Meaning of the Indication Elements
Flashing Battery Charge Indicator 2
The charging procedure is signalled by a flash-
ing battery charge indicator 2.
Continuous Lighting of the Battery Charge Indicator 2
Continuous lighting of the battery charge in-
dicator 2 indicates that the battery is fully
charged or that the temperature of the battery
is not within the allowable charging tempera-
ture range, and cannot be charged for this reason. The battery
is charged as soon as the allowable charging temperature
range is reached.
Bosch Power Tools
When the battery is not inserted, continuous lighting of the
battery charge indicator 2 indicates that the mains plug is in-
GAL 12V-20
serted in the socket and that the battery charger is ready for
2 607 226 ...
operation.
Troubleshooting – Causes and Corrective
V 3.6 – 12
Measures
mA 2000
Cause
°C 0 – 45
Continuous lighting of the battery charge indicator 2
No charging procedure possible
(80%) 100%
Battery not (properly)
inserted
min (35) 50
Battery contacts
min (50) 65
contaminated
min (70) 95
min (145) 185
1 – 6
Battery pack defective
Battery charge indicator 2 does not light up
kg 0.25
Mains plug of battery charger
/ II
not plugged in (properly)
Socket outlet, mains cable or
battery charger defective
Working Advice
With continuous or several repetitive charging cycles without
interruption, the charger can warm up. This is not meaningful
and does not indicate a technical defect of the battery charg-
er.
A significantly reduced working period after charging indi-
cates that the battery is used and must be replaced.

Maintenance and Service

If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
After-sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch's application service team will gladly answer questions
concerning our products and their accessories.
In all correspondence and spare parts orders, please always
include the 10-digit article number given on the nameplate of
the product.
English | 5
Corrective Measure
Properly insert battery into
battery charger
Clean the battery contacts
(e.g. by inserting and remov-
ing the battery several times)
or replace the battery
Replace the battery
Insert mains plug (fully) into
the socket outlet
Check the mains voltage; have
the battery charger checked
by an authorised after-sales
service agent for Bosch power
tools
1 609 92A 48G | (12.12.17)