Operating instructions

Troubleshooting
44
10 Troubleshooting
10.1 Battery mode – “BATTERY ON”
Fault Possible cause Suggested remedy
Device does not cool
(“POWER” LED is lit).
Defective compressor. This can only be repaired by an
authorised repair centre.
The display shows an error
message (e.g. “Err1”) and
the device does not cool.
The device has switched
off due to an internal fault.
This can only be repaired by an
authorised repair centre.
The display remains dark
after switching on the device.
The battery monitor is
checking the power
supply.
Wait about three minutes until the test
has been completed.
The status LED (fig. 4 1,
page 4) is off during
operation on an external
power source.
No power supply
available.
Charge the external battery as needed.
The status LED
(fig. 4 1, page 4) flashes.
The external power
supply is too low.
Check the external power supply.
The charging display
(fig. 4 3, page 4) does
not show anything in
battery mode.
The control board is
defective.
This can only be repaired by an
authorised repair centre.
The first LED of the
charging display (fig. 4 3,
page 4) flashes and a
beeping signal sounds.
The internal battery
is empty.
Operate the cooler with an external
power supply instead of with the
internal battery so that the battery
can then be recharged.
The second LED on the
charging display (fig. 4 3,
page 4) starts flashing.
The internal battery
is overheated.
Check that the ventilation slots are
free and the fan is working.
The third LED on the
charging display (fig. 4 3,
page 4) starts flashing.
The internal battery
is defective.
The internal battery must be
exchanged (see “Changing the
internal battery” on page 42).
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