HD7870/80 /
HD7870/81
7-12
SENSOR AND LED TEST
To validate the assembly and electrical correctness of an
appliance, especially during testing and debugging phase,
a sensor and LED test is very useful. Please keep in mind
that it is not an automated test and only intended as
indication.
Service-step 0 Entry to test mode:
1. Connect mains;
2. After 0.5 second and before 1.5 second operate the
2-cup button.
3. Release all switches.
4. All LEDs will be ON for 1.0 seconds and after that
switch to OFF again.
Service-step 1 Sensor identifi cation:
1. Manually operate a button or sensor.
The related LED - refer to the table on p.4 -
will be ON.
2. Release the button or sensor.
The related LED - refer to the table on p.4 -
will be OFF.
Service-step 2 End test
1. Disconnect mains
end test program
PCBA REPLACEMENT
When there is the need for a PCBA replace-
ment the default setting of the PCBA will be:
• Boiler empty flag = SET
• ME/HE selection = Mid end
• Country selection = General version
Please follow below way of working.
Start
End
Manual pump
calibration
(see previous page)
Country
selection
(see previous page)
ME / HE
selection
(see previous page)
(HD7872 / HD7873 only)
*) you can enable the Personal coffee
memory function on a HD7870
appliance, but the LED on the User
Interface will not be visible.
Sets the default
Regular coffee cup
volume
Sets the
corresponding
Strong coffee cup
volume
Enables the Personal
coffee memory
function
*
!
REPAIR INSTRUCTION
