Technical data

Table Of Contents
FAULTS
6 720 803 687 (2012/11)60
10.2.6 EXTERNAL UNIT FAULTS EXTERNAL UNIT LED DISPLAY
Fig. 64 LED position at the external unit
When a fault display is shown, observe the following:
When a fault occurs, the fault code will be signalled by two LEDs
flashing on the external unit.
The fault code will be indicated (P1, E6 etc.) if troubleshooting is
carried out using the service tool.
For description, cause and remedy of a fault, see the following table.
DANGER: Risk to life through accumulated charges.
With the power supply switched off, electronic
components may still hold an electric charge that is
maintained after switching off and isolation from the
power supply. Contact with such components can result
in severe or fatal injuries.
Once the green LED on the PCB of the external unit
has extinguished, wait at least a further 10 minutes.
External unit faults are signalled by LED1 (green) and
LED2 (red) on the PCB in the external unit.
LED Colour Description
2Red Voltage
1 Green Requirement
Table 36 LED colour assignment
6720803687-08.1Wo
2
1
Operating state Indication on the PCB of the external unit Service tool (7-716-161-051)
LED green LED red Code Display indication
If the external unit is switched on - <---> - Alternately flashing display
If the external unit stops 00, ... Operating mode
If the compressor in the external unit
heats up
08, ...
If the external unit operates C5, H7, ...
Table 37 LED display of the external unit (
= LED illuminates,
= LED does not illuminate)
The cause, remedy or checking of the codes in table 38
are explained in detail in the following table 39. Use the
service tool (7-716-161-051) for a more detailed
diagnosis.