Miele G 7881 Service Manual

							2.2 Program Sequence Plans - EGPL 081
For program sequence plans for G 7882 CD and G 7883 CD, see 070 2.7
Software Index Versions, Program Sequence Plans.
2.3 Programming Mode - Programming Levels E 01 to E 34
(Programming Mode)
See 070 2.8 Programming Mode - Programming LevelsE 01toE 34.
2.4 Service Mode 2 - Service Levels S 21 to S 27
See 070 2.9 Service Mode 2 - Service LevelsS 21toS 27.
Descriptive Technical Documentation
DTD no. 62-7881 072-5
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							080 Electrical Installations
x
Descriptive Technical Documentation
DTD no. 62-7881 080-1
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							2 Function
2.1 Electronic (2N1) Plug Allocation
2.1.1 Electronic EZL (031) 081
x
Fig. 1:Electronic EZL (031) 081 Plug Allocation
1 Plug connection ST 4 - I
2C bus (internal interface)
2 Plug connection ST 3 - One output with supply voltage and two
inputs (digital)
3 Plug connection ST 2 - Four outputs with supply voltage
4 Plug connection ST 1 - Three outputs with supply voltage and one
input (digital)
2.1.2 Terminal Allocation of Individual Plugs on Electronic EZL (031) 081
Individual plugs (see 080 Fig. 1, Pos. 5-14) may be vacant or missing depending
on model.
Plug 5(I
2C, internal interface)
–Contact 4, +8V
–Contact 1, GND
Plug 6(level switch 2B1/7, level indicator for external detergent container)
The leads are connected to the DOS module dispenser (DOS 4) connections on
the rear of the machine, D Layout of Electrical Components 1.
–Contact 12, GND
–Contact 11, DOS 4 (2B1/7)
Plug 7
–Contact 10, XOR - Signal
–Contact 9, GND
Plug 8
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							–Contact 8, AD (demineralized water) - GND
–Contact 7, AD (demineralized water) - Signal
–Contact 6, KW (cold water) - Signal
–Contact 5, KW (cold water) - GND
Plug 9
–Contact 4, WW (hot water) - GND
–Contact 3, DK WW (steam condenser hot water) - Signal
–Contact 2, condensate pump (M13)
–Contact 1, N
Plug 10(solenoid valve, steam condenser, cold)
–Contact 7, solenoid valve 1Y22
–Contact 6, GND
Plug 11(solenoid valve, steam condenser, cold)
–Contact 5, solenoid valve 2Y22
–Contact 4, GND
Plug 12(CD models only)
–Contact 3, TA EIN (drying unit on)
–Contact 2, TA Reg. (drying unit heating, heater bank control load)
–Contact 1, N
Plug 13
–Contact 11, TA GL, (drying unit heating, heater bank base load (for CD
models))
–Contact 10, N
–Contact 9, GND
–Contact 8, float switch, acidic agent (B8/6), DOS 3
–Contact 7, dispenser pump, acidic agent (M9/3), DOS 3
–Contact 6, N
–Contact 5, N
–Contact 4, N
–Contact 3, L1, voltage supply for EZL additional module via main switch S2
and door contact switch 1S4
Plug 14(external dispenser pump)
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							The leads are connected to the DOS module dispenser (DOS 4) connections on
the back of the machine, D Layout of Electrical Components 1.
–Contact 2, M9/7, DOS 4
–Contact 1, N
2.2 Dispensing Monitor EZQ 081
2.2.1 EZQ 081 Function
Auxiliary electronic EZQ 081 (dispenser relay check)interrupts the neutral
conductor of the voltage supplyto all dispensing systems if the maximum
dispensing time of 7 minutes has been exceeded by one dispensing system.
2.2.2 Plug Allocation EZQ 081
x
Fig. 2:EZQ 081 Electronic
Connector ST 1
–Contact 1–Neutral conductor
–Contact 2–Neutral conductor DOS
–Contact 3–Neutral conductor DOS
–Contact 4–Neutral conductor DOS
–Contact 5–DOS 1
–Contact 6–DOS 4
–Contact 7–DOS 3
Connector ST 2(I
2C, internal interface)
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							–Contact 1–GND
–Contact 2–Data link to I
2C bus
–Contact 3–Data link to I
2C bus
–Contact 4–(+) 8VDC
2.3 Wiring Diagram and Legend
2.3.1 Wiring Diagrams
G 7881
The following wiring diagrams are applicable for the G 7881.
x
Diagram no. Description
05746271 Without dispensing check or EZQ 081
(dispensing relay check) module.
06000381 Without dispensing check or EZQ 081
(dispensing relay check) module. New wiring
for solenoids Y20 and Y1 (demineralized and
cold water intakes).
06869610 With dispensing check (B8).
07061880 With dispensing check, module 4N1, and
dispensing relay check module EZQ 081.
Table 1:G 7881 Wiring Diagrams
2.3.2 Wiring Diagram Legend
x
Component Description
B1/1 Water intake level switch
B1/7 Detergent dispenser level switch
B1/10 Heating level switch
1B3/4 Flow meter
2B3/4 Flow meter
B3/9 Speed sensor
B8 Float switch (dispensing check)
B8/1 Rinse aid dispenser float switch (reed switch)
B8/2 Reactivation salt float switch (reed switch)
B8/3 Overflow float switch
B8/6 Acidic acid float switch
C6 Circulation pump capacitor
EZQ 081 Dispensing relay check (G 7881 only)
F2 Temperature limiter (thermostat)
1F3 Circulation pump winding protection
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							2F3 Drain pump winding protection
F7 Fine-wire fuse
1K1/1 Heater relay (water/pulsed drying)
2K1/1 Heater relay (water only)
M6 Circulation pump
M8 Drain pump
M9/3 Acidic acid dispenser pump
M9/5 Detergent dispenser pump
M13 Condensate drain pump
1N1 Electronic
2N1 Electronic
3N1 Electronic
7N1 Electronic
8N1 Electronic
N2 Speed selector
R1 Heater element 1 (water + drying)
R2 Heater element 2 (water)
R3 Heater element 3 (water)
1R30 NTC temperature sensor (water)
2R30 NTC temperature sensor (water)
3R30 NTC temperature sensor (air) (G 7883 CD only)
S2 On/Off switch
1S4 Door switch (positioning)
2S4 Door switch (open door)
T1 Transformer
X1/2 Dispenser unit socket
X3/1 Main terminal block
X3/2 Heating terminal block
X5 Coupling
X5/2 Drying-unit coupling
Y1 Double solenoid valve (WPS) - cold-water intake
Y12 Double solenoid valve (WPS) - hot-water intake
Y20 Double solenoid valve (WPS) - demineralized water intake
Y38 Reactivation solenoid valve
Y50 Liquid dispenser
Y51 Powder dispenser
Y53 Door release magnet
Z1 Interference suppression filter
Table 2:Wiring Diagram Legend
Descriptive Technical Documentation
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							2.4 Power Supply Connection Conversion Possibilities
These machines are supplied as standard for connection to 3 AC 208V 60Hz.
Connection to one or two phases is possible but this results in a heating power
reduction; see C Table 2. If a heater rating of 6kW is to be achieved with
connection to a single phase, then the connection of the heater elements and
power supply should be modified in accordance with the following diagram.
x
Fig. 3:Heating Connection (6kW) with 208VAC
Warning!
Connection of the phase terminals isonlypermitted when in accordance with
080 Fig. 3. For details, see Heater Element Connection Conversion From 3 N
AC 400 V To 230VAC, 080 4.1.
2.5 Heater Control, Heater Relays
Both heater relays, solenoid voltage 6VDC, are positioned together with the
overflow level switch on a mounting bracket on the connecting strip, 010 Fig. 8,
Pos. B. In cleaning stages both relays are operated but the second one is
switched on approximately 100 milliseconds after the first. In the drying phase
relay 1K1/1 only is operated with pulsed power. The neutral conductor of the star
connection is also laid via this relay. For heating water the relays are only
switched on after the heating level switch, 050 2.6.2 Heater Level Switch B1/10,
has remained switched on for 2 seconds without a break.
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							3 Fault Repair
3.1 No Voltage for Relay Solenoid 1K1/3 in Drying Unit (TA)
G 7882 CD, G 7883 CD
Cause
No voltage between contacts 3 (TA on) and 1 (N) of plug 12 on ELZ 081
electronic.
Remedy
ADisconnect plug 12 and check output 16 via the service mode, 070 2.9.4S 24,
Checking Outputs 12 - 19.
AIf no voltage is present, check the voltage supply for EZL 081 via main switch
S2 and door contact switch 1S4 at plug 13, contact 3 (L1) and 4 (N).
AIf voltage is present, replace the electronic; see Electronic Module EZL 081
Removal, 070 4.5.
3.2 Suds Warm Up Too Slowly/Wash Cycles Take Longer to Heat
Water
Cause
Heater element defective.
Remedy
ACheck the heater elements for continuity; see Checking the Heater Element,
030 4.1.
AReplace the faulty heater element; see Heater Element Replacement, 030
4.5.
Cause
Heater relay 2K1/1 or 1K1/1 do not switch.
Remedy
ACheck solenoid voltage (6VDC).
ACheck plug connections.
ACheck solenoid for continuity.
ACheck contacts for continuity.
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							3.3 Load Does Not Dry
Cause
Heater relay 1K1/1 does not switch.
Remedy
ASee also Suds Warm Up Too Slowly/Wash Cycles Take Longer to Heat
Water, 080 3.2.
Cause
Heater element R1 defective.
Remedy
ACheck heater element R1 for continuity; see Checking the Heater Element,
030 4.1.
AIf necessary, replace the heater element; see Heater Element Replacement,
030 4.5.
Descriptive Technical Documentation
DTD no. 62-7881 080-9
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