Miele COFFEE SYSTEM CVA 4068, Technical Information, Page: 29 / 118

Technical Information
29
CVA 4062/CVA 4066/CVA 4068 Coffee Systems
2 Function
2.1 Optical Interface (MDU)
The appliance has an optical interface for diagnostic support or program updating; see
Figure 025-1, Item 1.
Its location can be found by using the optical interface search function of the Miele
Diagnostic Support unit (MDU).
Figure 025-1:
Optical Interface for Diagnostic Support and Program Updating
2.2 Control/Display Electronic EPWZ (N5)
The control/display electronic is located in the door (Figure D-3 or D-4, Item 8).
It is connected to the power electronic EPL (N4) via a communication cable and
controls the messages in the display.
2.3 Touch Controls
Select a program using the
<
and
>
touchpads. See Figure D-1, Items 3 and 5.
Confirm selections with the
OK
touchpad (Figure D-1, Item 4).
Use
Back
to go back to the previous screen.
3 Fault Repair
3.1 Diagnostic Support Cannot Establish a Connection
Symptom:
The connection cannot be made via the optical interface.
Cause:
Diagnostic support cannot be used with a machine logged onto RemoteVision.
Remedy:
3 remedies are possible:
1. Access the service mode, or
2. Briefly disconnect the machine from the power supply, or
3. Log off the machine from the RemoteVision system.
Subsequently, diagnostic support can be connected to the machine via the optical
interface. RemoteVision cannot be used while this connection is in place.