Miele G 7881 Service Manual

2.6 Level Switches
2.6.1 Float Switch B8/3
If a water intake hose should leak, the leaking water flows along the outer hose
sleeve to the drip pan in the bottom of the machine. When a certain quantity of
water has collected in the drip pan, float switch B8/3 (050 Fig. 1, Pos. 8) acts to
stop the water flow by closing the WPS solenoid valves Y1, Y12 and/or Y20,
resulting in fault codeF 26(070 Table 51). At the same time, the drain pump is
activated to remove the wash water from the cabinet.The drain pump...

2.7 NTC Temperature Sensors
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NTC Sensor Resistance Values
Temperature (°F) Temperature (°C) Resistance (kΩ)
32 0 Approx. 35.9
41 5 Approx. 28.5
50 10 Approx. 22.7
59 15 Approx. 18.2
68 20 Approx. 14.7
77 25 Approx. 11.9
86 30 Approx. 9.7
95 35 Approx. 8.0
104 40 Approx. 6.6
113 45 Approx. 5.5
122 50 Approx. 4.6
131 55 Approx. 3.8
140 60 Approx. 3.2
149 65 Approx. 2.7
158 70 Approx. 2.3
167 75 Approx. 1.9
176 80 Approx. 1.7
185 85 Approx. 1.4
194 90 Approx. 1.2
199 93 Approx. 1.1
203 95 Approx. 1.0
Table...

3 Fault Repair
3.1 Heating Level Switch Does Not Switch On
Cause
Heating level switch does not react to water pressure.
Remedy
ACheck the switching point and continuity of the heating level switch.
AReplace the heating level switch, if necessary.
Cause
Excessively foaming detergent or rinse aid in the wash water. This reduces the
wash water pressure developed by the circulation pump and applied to the
heating level switch.
Remedy
AUse a different detergent or rinse aid.
3.2 Premature Failure of...

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Note
To protect seals, do not use disinfecting, alkaline detergents with a high
proportion of active chlorine at temperatures above 176°F (80°C).
3.3 Circulation Pump Does Not Start
Cause
Circulation pump motor winding too hot and the winding protection device 1F3
has tripped (it resets automatically after about 10 minutes). Foreign objects may
be blocking the pump.
Remedy
ACheck the circulation pump for correct operation; see 070 2.9.3S 23,
Checking Outputs 1 to 11.
ACheck the circulation pump...

4 Service
4.1 Speed Sensor B3/9 Check
AActivate the circulation pump in service mode 2 (070 2.9.3S 23, Checking
Outputs 1 to 11).
AIf the circulation pump starts briefly (3 start attempts) and then stops, then the
speed sensor is not providing any pulses (display flashes).
4.2 NTC Temperature Sensor Replacement
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Fig. 2:Temperature Sensor with Housing
AService Panel Removal, 022 4.2.
AToekick Removal, 010 4.6.
ARemove the holding bracket (080 Fig. 4, Pos. 2) by removing the retaining
screws (080 Fig. 4,...

4.3 Drain Pump Removal
AService Panel Removal, 022 4.2.
ARemove the left side panel (Side Panel Removal, 010 4.1), if possible.
ARemove the terminal block mounting bracket.
ATwist the pump clockwise to unlock; remove the red clip, if applicable (usually
found on older models).
ADisconnect the electrical connection.
APull the pump out of the machine.
4.4 Sump Removal
ATilt the machine onto its right side.
ARemove the bottom pan.
ARemove the heater relay mounting bracket.
ADisconnect the drain pump hose...

4.6 Circulation Pump/Speed Sensor Removal
ATilt the machine onto its right side.
ARemove the bottom pan.
ADisconnect the sump hose in front of the circulation pump.
ADisconnect all visible hoses from the pump (one is connected to the heater
pressure switch).
ADisconnect the speed sensor wiring harness (red/yellow).
ADisconnect the electrical connection from the circulation pump.
ARemove the 8mm bolt securing the circulation pump to the machine rear
panel.
ATake the pump out and unclamp a third hose....

061 Air Vent, Cabinet Ventilation
G 7882 CD, G 7883 CD
x
Descriptive Technical Documentation
DTD no. 62-7881 061-1
18.09.2013, US_am This information should not be duplicated or passed on without Miele approval. All rights reserved. 

1 Technical Data
Technical data currently not available.
Descriptive Technical Documentation
061-2 DTD no. 62-7881
This information should not be duplicated or passed on without Miele approval. All rights reserved. 18.09.2013, US_am 

062 Steam Condenser
G 7881, G 7882, G 7883
x
Descriptive Technical Documentation
DTD no. 62-7881 062-1
18.09.2013, US_am This information should not be duplicated or passed on without Miele approval. All rights reserved.