Bosch Professional GHG 18V-50 Original Instructions Manual page 7

Battery charge indicator
The green LEDs on the battery charge indicator indicate the
state of charge of the rechargeable battery. For reasons of
safety, you can call up the state of charge only when the heat
gun is off.
Press the button for the battery charge indicator
show the state of charge. This is also possible when the re-
chargeable battery is removed.
If no LED lights up after pressing the button for the battery
charge indicator, then the rechargeable battery is defective
and must be replaced.
Battery model GBA 18V...
LED
3 × continuous green light
2 × continuous green light
1 × continuous green light
1 × flashing green light
Battery model ProCORE18V...
LED
5 × continuous green light
4 × continuous green light
3 × continuous green light
2 × continuous green light
1 × continuous green light
1 × flashing green light
Operation
Starting operation
Remove the rechargeable battery before changing ac-
u
cessories or storing the heat gun. This safety measure
prevents the heat gun from being started accidentally.
Creation of Smoke During Initial Use
A coating protects the metal surfaces from corrosion ex-
works. This protective layer evaporates during initial use.
The heat gun may display discolourations on the nozzle (1)
due to the production process. These do not count as dam-
age; the functioning of the heat gun is not affected.
Selecting a Power Setting
With the output level setting (3) you can choose between
two different output levels. The LED worklight flashes briefly
while switching:
– Setting 300 °C
With this setting, you can, for instance, thaw water pipes
or process heat shrink plastic tubes. Upon switching on,
Bosch Power Tools
this temperature is reached in less than 6 s. With a fully
charged 8 Ah rechargeable battery, the runtime is up to
21 min.
– Setting 500 °C
With this setting, you can, for instance, remove paint or
soft-solder.
or to
The specifications on heating-up time refer to measurements
at room temperature.
Switching On
To switch on, first press the unlocking switch (4) and then
the on/off switch (5). After starting, you can release the un-
locking switch (4). The unlocking switch (4) does not have
to be pressed again during operation.
Upon starting the heat gun, the LED worklight (6) switches
on and illuminates the work area.
Capacity
Switching Off
60–100 %
To switch off the tool, release the on/off switch (5).
30–60 %
Switch off the heat gun at the rechargeable battery (9) to al-
low it to cool down.
5–30 %
0–5 %
Restart Protection
If the rechargeable battery (9) is removed from the heat gun
while in operation and the on/off switch (5) is still being held
down when it is reinserted, the restart protection will activ-
ate. The LED worklight (6) flashes and the heat gun does not
start.
Release the on/off switch (5) and switch the heat gun back
Capacity
on as usual.
80–100 %
Overheat Protection for the Rechargeable Battery
60–80 %
If the rechargeable battery (9) gets too hot during operation,
40–60 %
the output is reduced. The LED worklight (6) flashes slowly
20–40 %
for as long as the on/off switch (5) is pressed.
5–20 %
If the heat gun continues to be operated and the temperat-
ure in the rechargeable battery increases further, the heat
0–5 %
gun will switch itself off.
Reduced Output
The heat gun is compatible with all available 18 V Bosch Pro-
fessional rechargeable batteries.
When operating the heat gun with rechargeable batteries
smaller than the recommended 4 Ah, however, the heat gun
will not reach full power at the 500 °C setting (the temperat-
ure is not reached and the air volume is reduced). In order to
show that the heat gun is working only with reduced output,
the LED worklight (6) flashes slowly several times upon
switching on.
LED Displays
The LED worklight (6) is also used as an LED status indic-
ator.
Feedback via LED
Brief flashing
Flashing multiple times when
starting the heat gun
English | 7
Event description
Temperature change
Reduced output (use of re-
chargeable battery < 4 Ah)
1 609 92A 6F6 | (27.08.2021)