Miele G 7881 Service Manual

x
Note
The pump is only being ventilated successfully when the air bubble in the hose
advances continuously. If the air bubble falls or retreats during pumping breaks,
a leak may exist in the system.
Cause
Leak in suction hose.
Remedy
ACheck the hoses and connections for porous sections, leaks and correct
positioning.
3.3 No Voltage at DOS G 60 Dispenser Module
Cause
Voltage supply interrupted or not present.
Remedy
ACheck the programming. Ensure that the DOS dispenser module is activated.
ACheck 5-pin...

4 Service
4.1 Installation and Commissioning of DOS Dispenser Module
x
Warning!
Before shipping the dispensing module, the system functions were factory-
tested with glycerin. In order to avoid faults or polluting the machine with glycerin
residue,always observethe following steps.
•Remove all caps from the dispensing hoses and the DOS module.
•After connecting the hoses and installing the dispensing module,
thoroughlyflush the entire system with warm water.
Fig. 6:DOS G 60 Dispenser Module in Base Unit...

AInstall the suction probe in the appropriate agent container and screw it tight.
AVentilate the dispenser pump; see 070 2.8.2E 02, Dispenser Settings.
x
Note
Any detergent residues in the cabinet after ventilation must be diluted and
flushed out.
ASet the quantity to be dispensedin accordance with the manufacturer's
instructions; see 070 2.9.2S 22, Setting Printer Interface (RS-232) and
Dispenser Pumps.
x
Note
If the manufacturer's instructions are not available then about2 to 3 millilitersof...

4.3 Connecting the Connection Plug for DOS Modules from Series C
to DOS Modules from Series G
x
Note
If a C-series DOS dispenser module is to be connected to a G 7881, then the
connection cable must be replaced with a connection cable with angled plug
(available from the Spare Parts department). If a straight plug is used instead of
an angled version, then it may be necessary to knock out a 1.6-inch (four-
centimeter) hole in the wall where it is contacted by the plug, as the machine has
a depth of 23.6...

092 Liquid Dispensing
x
Descriptive Technical Documentation
DTD no. 62-7881 092-1
18.09.2013, US_am This information should not be duplicated or passed on without Miele approval. All rights reserved. 

4 Service
4.1 Retrofitting Dispenser Hoses When Using MIC Carts
G 7882, G 7882 CD
x
Warning!
In order for dispensing quality to meet the special requirements for cleaning
microinstruments (e.g., in opthamology), the G 7882 dispensing systemmustbe
retrofitted withsmaller hoses (3 mm diameter)for theuse of opthamology
carts (e.g., E 429 and E 440). Machines to be retrofitted are those which were
not equipped as standard with thinner hoses (and whose hoses are missing the
ventilation hole on the dispensing...

AAfter installing the new hoses, access the“DOS fill”parameter in the
programming menu and reduce the fill amount to 35 millimeters, since the
new hoses are significantly thinner than the old ones.
Descriptive Technical Documentation
DTD no. 62-7881 092-3
18.09.2013, US_am This information should not be duplicated or passed on without Miele approval. All rights reserved. 

093 Dispenser Pump, Container
G 7882 CD, G 7883 CD
4 Service
4.1 Removing the Drawer with Drip Tray
x
Fig. 1:Drip Tray with Holding Bracket
1 Holding bracket
2 Drawer guides
3 Drip tray
ARemoving the Drying Unit Container, 095 4.3.
ALoosen the retaining clips for connection cables and hoses.
4.2 DOS 60 and/or DOS 10 Dispenser Pump Removal
ARemove the drawer; see Removing the Drawer with Drip Tray, 093 4.1
ARemove the three retaining screws from the top of the appropriate dispenser
pump.
ARemove the...

095 Drying Unit (TA) Container
G 7882 CD, G 7883 CD
2 Function
2.1 Drying Unit Air Paths
x
Fig. 1:Air Path from Drying Unit to Cabinet
1 Air path intake (angled duct piece) from drying unit fan
2 Air duct on rear of machine
3 External air temperature sensor (NTC)
4 Air path output to cabinet
5 Non-return flap
To prevent suds from entering the air path from the drying unit, a spring-loaded
non-return flap (095 Fig. 1, Pos. 5 ) is installed in the duct just before the output to
the cabinet (095 Fig. 1,...

2.3 Setting the Fan Speed (Air Throughput)
x
Fig. 2:Drying Unit with Potentiometer
1 Drying unit retaining screw
2 Potentiometer (220kΩlinear)
3 Hole for setting fan speed
4 Drying unit fascia retaining screw
Potentiometer 1R32 (see wiring diagram 096 Fig. 2) can be used to adjust the
speed of the fan motor and hence the air throughput of the drying unit within
certain preset limits. Turn the potentiometer clockwise to increase the speed and
counterclockwise to decrease the speed. The factory setting is...