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Siemens
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SE25M575GB series
Repair Instructions
67 pgs1.45 Mb0

Siemens SE25M575GB series Repair Instructions

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Dishwasher
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1 SAFETY
DANGER
Repairs may be carried out by a qualified electrician only!
The user may be put at risk and injured by improper repairs!
To prevent electric shocks, always comply with the following instructions:
► If the appliance is faulty, the housing or frame may be live!
► Electric shock may occur if live components are touched
inside the appliance!
► Before commencing repairs, disconnect the appliance from
the power supply!
► If tests have to be performed while the appliance is live,
always use a residual-current-operated circuit-breaker!
► The protective conductor resistance must never exceed the
values specified in the standard! The protective conductor is crucial for personal safety and appliance function.
► When repairs are complete, conduct a test in accordance with
VDE 0701 or the corresponding national regulations!
► When repairs are complete, perform a function and leak test.
WARNING
Comply with the following instructions:
If conducting the test in accordance with VDE 0701 via the connector, the heater (instantaneous water heater) must be tested directly for insulation faults due to all-pole disconnection (relays; pressure switch) or the differential current must be measured on the appliance!
If replacing the dispensing device and the pump sump, beware of sharp edges in the area of the stainless-steel modules.
Before commencing repairs, always disconnect the appliance from the power supply! If tests have to be performed while the appliance is live, always use a residual-current-operated circuit-breaker!
Sharp edges: Wear protective gloves.
Electrostatic sensitive devices! Please observe handling regulations.
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2 INSTALLATION
2.1 Aligning the appliance
To ensure a perfect locking function and prevent leaks in the area of the door, the appliance must be aligned precisely via the height­adjustable feet. If the appliance is integrated, the middle rear height­adjustable foot can be adjusted from the front.
When installing the appliance, please note:
► Using the height-adjustable feet, raise the appliance
until the housing touches the worktop.
► The installation instructions (drilling template) are
required for attaching the furniture front to integrated and fully integrated appliances.
► The tensile force of the door springs in integrated
and fully integrated appliances can be adjusted to the weight of the furniture door (See Door spring point).
► To prevent injury, a side cover 481271 can be fitted
near the hinges of appliances which are fitted to the end, built in or under or are free-standing.
2.2 Electrical connection
Connect the appliance to a correctly installed earthed socket only. Comply with the specifications on the rating plate.
2.3 Water connection
If the appliance is connected to the drain with the standard hose length, the max. permitted height from the floor is 90 cm. If the drainage hose is extended, a max. height of 80 cm must not be exceeded. The water connection (3/4 inch) requires a conventional water line with a water pressure of at least 0.5 bar (0.5 at.) (when the tap is turned on, the water flow rate must be more than 8 l/min.). If the water pressure is more than 10 bar (10 at.), a pressure reducing valve must be installed.
The appliances can be connected to warm water up to 60 °C. However, it is recommended to connect the appliance to cold water (better drying
and washing results).
Connection dimensions for all 60 cm dishwashers
a 1.3 m d 1.2 m (3.4 m with extension set)
b 1.6 m e 1.6 m (3.6 m with extension set)
c 1.4 m (3.6 m with extension set) f 1.2 m (3.2 m with extension set)
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3 OPERATION
3.1 Module view
3.2 Display
The display consists of a 3-digit 7-segment display. The expected re­maining running time is displayed in hours and minutes.
The remaining running time is recalculated at the end of the heating positions. If deviations occur on account of the aqua sensor decisions, water supply temperature, number of utensils, etc., the indicated remaining running time is corrected in these positions. Time jumps of up to 60 minutes may occur. At the start of the programme the remaining running time is displayed which was required by this programme the last time.
3.3 Pushbuttons / Additional functions
3.3.1 Timer programming (TP)
The timer programming button enables the start time to be delayed by up to 24 h
3.3.2 Soaking (optional)
The “soaking” button can also be selected for any rinse programme. If the button is pressed, an additional prerinse occurs and the bottom basket is heated to 55°. This causes the running time to be extended by approx. 20 min. Recommended for mixed utensils (top basket: fragile utensils / bottom basket: very dirty non-fragile utensils).
3.3.3 Top basket (optional)
The top basket button must be pressed if only the top basket is to be rinsed. The water points are positioned for top basket rinsing through­out the rinse cycle. However, the programme sequence is the same as for alternate rinsing.
3.3.4 Time reduction (optional)
The time reduction button can also be selected for any programme. When the button is pressed, the circulation and drying times and therefore the rinsing and drying performance are reduced
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3.3.5 Half load (optional)
The “Half Load” function reduces water consumption and the running time. Basically this is achieved by passing over the prerinse and the second intermediate rinse cycle.
3.3.6 Vario speed (optional)
The Vario speed function reduces the programme running time with a higher water and energy consumption. This is achieved by using more water in the rinse cycle and with water points with two-basket function.
3.4 Pushbuttons / Programme selection
3.4.1 Intensive 70°
The programme consists of a prerinse at 50°, wash cycle at 70°, two intermediate rinse cycles, final rinse at 70° and a drying cycle. Please ensure that the utensils are washed in the bottom basket only until the temperature is reached.
3.4.2 Auto 55°–65° (depending on model)
In the auto programme the Aqua sensor decides not only on a water change after the prerinse, but it also specifies the temperature of the wash cycle and the number of intermediate rinse cycles. If clean water is detected in the prerinse, the water from the prerinse is also used in the wash cycle, a wash cycle at 65°, one intermediate rinse cycle and a drying cycle. If dirty water is detected in the prerinse, the prerinse cycle runs, a wash cycle at 51°, two intermediate rinse cycles and a drying cycle.
3.4.3 ECO 50°
The programme consists of a wash cycle at 50°, one intermediate rinse cycle, final rinse at 66° and a drying cycle. The Aqua sensor is not active in this programme. Please ensure that the utensils are washed in the bottom basket only until the temperature is reached.
3.4.4 Gentle 40°
The programme consists of a prerinse cycle, a wash cycle at 40°, one intermediate rinse cycle, final rinse at 55° and a drying cycle.
3.4.5 Quick 35°
The programme consists of a wash cycle at 35°, one intermediate rinse, final rinse at 55° without drying. The Aqua sensor is not active in this programme.
3.4.6 Prerinse
The programme consists of a prerinse only. The Aqua sensor is not active in this programme.
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3.5 Special functions
3.5.1 Setting the hardness range
Hold down the S5 button and switch on the appliance. The set value is indicated on the digital display. The set value increases by one each time the S5 button is pressed. When the value H:07 is reached, the display jumps back to H:00. While the hardness range is being set, the L5 LED flashes. If the appliance is switched off, the value is saved. (Table below)
°dH °fH °Clarke mmol / l Salt
consumption in
g per rinse cycle
Set value
0–3 0–6 0–4 0–0.6 0 H 00 4–6 7–11 5–8 0.7–1.1 2 H:01
7–9 12–16 9–11 1.2–1.6 4 H:02 10–12 17–21 12–15 1.7–2.1 6 H:03 13–16 22–29 16–20 2.2–2.9 9 H:04 17–21 30–37 21–26 3.0–3.7 14 H:05 22–30 38–54 27–38 3.8–5.4 27 H:06 31–50 55–89 39–62 5.5–8.9 54 H:07
Standard setting = H:04
3.5.2 Setting intensive drying
Hold down the S4 button and switch on the appliance.
S:00
is indicated
on the digital display. If the S4 button is pressed again,
S:01
is displayed and intensive drying is switched on. When the appliance is switched off, the value is saved. If intensive drying is activated, the temperature is in­creased by 3 K in the final rinse to improve the drying result.
3.5.3 De-activating the low rinse-aid indicator
Hold down the S0 button and switch on the appliance. I:01 is indicated on the digital display. If the S0 button is pressed again, I:00 is dis­played and the rinse-aid refill indicator is de-activated.
I:00 = switched off
I:01 = switched on
When the appliance is switched off, the setting is saved. If the low rinse aid indicator is de-activated, the temperature is increased by 3 K in the final rinse to improve the drying result. (see also 3 in 1
detergent detection)
3.5.4 Programme reset
When the appliance is switched on, press the S4 and S6 buttons for 3 sec. The programme is reset (3x intermittent pumping, then pumping for approx. 30 sec.).
Then close the detergent dispenser to reset the dispenser.
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3.5.5 Button lock (optional)
The button lock prevents a programme from being unintentionally selected.
► Activation:
Switch on appliance and select programme
Hold down S5 button for at least 4 sec.
CL is displayed
If a button is pressed while the programme is running, CL is displayed. The programme cannot be reset.
► Deactivation:
Hold down S5 button for at least 4 sec. until CL goes out
► When the programme ends, the button lock is
deactivated. If there is a power failure, the button lock is activated
► Whenever a programme is started, the button lock
must be re-activated
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4 COMPONENTS
4.1 Module
4.1.1 Filling logic
4.1.1.1 Tap turned off
If the level is not reached in the filling position within 6 minutes (f1 is not actuated), the programme is terminated (1 min. pumping → restart). This process can be repeated a total of 3x. If the filling level is still not
reached, the filler valve continues to be actuated until the level switch is actuated.
The display stops 6 min. after the start of the programme until the level is reached.
4.1.1.2 Level switch is not actuated
If the level switch (f1) does not switch over in the filling position, the filler valve is actuated until the safety level is reached. The safety switch switches the detergent-solution pump on and switches the filler valve off. When the safety switch has switched back, the filler valve is re-actuated. This results in a switchover between pumping and filling.
If the level switch (f1) does not switch over within 6 min., the pro­gramme is terminated (1 min. pumping). The filling step is then restarted. This process can be repeated a total of 3x. As a result, an attempt is made to get the level switch moving again. If the filling level is still not reached, the filler valve continues to be actuated until the
safety level is reached again (filling / pumping / filling / pumping ....).
The display stops 6 min. after the start of the programme until the level is reached.
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4.1.2 Regeneration electronics
The electronics determine, in comparison with the water hardness set on the appliance, the volume of water which is possible until the softening system is exhausted.
The number of rinse cycles is counted. Regeneration then takes place once the maximum possible number of rinse cycles has been reached.
The sequence characteristics of the regeneration electronics are described under Initial start-up / Replacing the electronics.
4.1.3 Warm water detection
If the water running into the final rinse cycle is hotter than 45 °C, the temperature in the final rinse cycle is increased to 72 °C in order to increase the inherent heat of the dishes. The heat exchanger is not filled.
4.1.4 Memory electronics
The electronics module has its own memory which remembers the programme last selected. If no new selection is made at the start of the programme, the programme last selected will run.
4.1.5 Power failure
The electronics module has a power failure memory function which ensures that the current rinse programme continues in the event of a power failure or programme interruption.
4.1.6 Sensors
All outgoing signals from the door switch, the level switch, the NTC sensor and the refill switches are recorded and evaluated by the microprocessor at the required time.
4.1.7 Consumers
The consumers such as the valves, the detergent and rinse aid dis­pensers and the circulation pump are actuated by triacs (see listing of triacs). The drainage pump and the instantaneous water heater are switched on by relays.
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4.1.8 Listing the triacs
Before replacing a module, always start the customer service test programme.
Before replacing a module, follow the ESD instruc­tions.
Before replacing a module due to a defective triac, test the actuated component.
A Heat exchanger outlet valve E Circulation pump B Regeneration valve F Raw water valve
C Filler valve G Dispenser actuator D Water points
H Switch controller / power supply unit
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4.1.9 Initial start-up / Replacing the electronics
The following programme sequence must be taken into consideration during the initial start-up or when replacing the electronics. ( Programme counter = 0 ! )
Programme sequence during the initial start-up with heat exchanger
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4.2 Actuator
The thermohydraulic system consists of a metal cylinder with plunger. The cylinder is filled with a substance which expands greatly when heated. The heat source is a PTC (positive temperature coefficient) (1) which is in direct contact with the metal cylinder (4). A strong pressure spring (3) returns the plunger (6) back to its original position when the heat source is switched off.
When voltage is applied to the PTC (1), the PTC heats up and transfers the heat to the wax-filled metal cylinder (4). The wax expands and forces the plunger (6) out of the cylinder. The plunger (6) transfers the mechanical movement to the release mechanism for dispensing the detergent and rinse-aid. If the heat source is switched off, the volume of wax is reduced by the cooling process. The pressure spring (3) returns the plunger (6) back to its original position.
Technical specifications: Designation Value Unit
Nominal voltage 110–240 V
Frequency 50 / 60 Hz
Resistor
0.5–1.5
kΩ
Actuation time approx. 2 min.
Reset time approx. 3 min.
1
PTC
5
Contact
2
Contact
6
Plunger
3
Pressure spring
X
Plunger travel
4
Wax-filled cylinder
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4.3 Aqua sensor (optional)
The infrared light-emitting diode (B) and the photodiode (A) are located opposite each other in a U-shaped translucent housing on a board. The infrared diode (B) transmits infrared light through the water flowing between the U to the light-sensitive base of the photodiode which then becomes conductive.
If the water is turbid, the light emitted by the infrared diode can no longer reach the photodiode. The absent voltage signal is detected by the microcomputer. Depending on the programme type, the water is changed after the prerinse or even the washing temperature is changed. If the turbidity value is not reached, the water remains in the rinsing tank for the wash cycle. In each programme sequence in which the Aqua sensor is active the sensor is also calibrated. If a calibration cannot be implemented successfully, a permanently stored programme is executed and an error is saved in the module.
A Photodiode C Detergent solution
B Infrared diode
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4.4 Aqua Stop valve
The Aqua Stop valve consists of two solenoid valves (A) in a row, the filler and safety valves. These valves are actuated in parallel. There are two filters on the screw connection for the tap. Under the filters is the flow limiter.
4.4.1 Safety function
The safety function may be actuated via the safety level chamber or via the float in the base pan.
The Aqua Stop valve is enclosed by a housing. The housing is connected to the bottom pan by a leakage water hose (sleeve of the inlet hose) (D). The inlet hose (C) and the electric control cable (B) for the solenoid valve are situated in the leakage water hose (D). If leaks occur in the area of the valve or inlet hose, these are conveyed into the base pan via the leakage water hose.
4.4.2 Technical specifications Designation Value Unit
Nominal voltage 230 - 240 V
Frequency 50 Hz
Resistor approx. 2
kΩ
Flow rate 2.75 l/min
Water pressure 0.5 - 10 bar
A
Solenoid valve
C
Inlet hose
B
Control cable
D
Leakage-water hose
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4.5 NTC
The utilised temperature safety switch (>85 °C) is combined with the NTC sensor. If a fault occurs, the heater is switched off at a water temperature of 85 °C (operates in switching mode).
Temperature in °C Resistance in kW Tolerance +/– °C
25 48.4 7.9
30 38.5 7.1
50 16.5 6.2
60 11.0 5.6
65 9.1 5.5
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4.6 Regeneration / drainage valve
The regeneration valve (B) and the drainage valve (C) are situated in the water softening system. If the regeneration valve (B) is actuated, the water stored in the regeneration chamber is conveyed through the water softening system (A). If the drainage valve (C) is actuated, the water stored in the heat exchanger is conveyed into the rinsing tank via the water softening system (A).
Technical specifications: Designation Value Unit
Nominal voltage 230 - 240 V
Frequency 50 Hz
Resistance 2.45
kΩ
4.7 Raw water valve
The raw water valve (D) is located at the rear on the water softening system (A) and is responsible for admixing hard water.
The raw or soft water valve (D) is actuated via the electronics module which calculates how frequently and how long the valve is to be actuated for. As a result, a constant water hardness of approx. 5° dH is obtained. For this reason it is important to set the hardness range precisely.
If the valve is actuated (open), the raw water is conveyed through the water softening system and softened. If the valve is not actuated (closed), the inlet to the water softening system is sealed and the raw water flows directly into the heat exchanger via the water inlet.
Technical specifications: Designation Value Unit
Nominal voltage 230 - 240 V
Frequency 50 Hz
Resistance 2.45
kΩ
A Water softening system C Heat exchanger outlet valve
B Regeneration valve D Raw water valve
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4.8 Salt and rinse-aid indicators (optional)
The dispenser contains a float with an integrated permanent magnet (A). The magnetic field actuates a reed switch on the outside of the dispenser. The lamps of the refill indicators in the control panel are switched on via this reed switch.
A Permanent magnet
B Reed switch open
C Reed switch closed
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4.9 Optical low rinse-aid sensor (optional)
The optical low rinse-aid sensor consists of a transmitter diode and a receiver diode.
A light beam is transmitted from the transmitter diode (A) to the receiver diode (B) via a prism (C). If the dispenser is full, the light beam in the prism is scattered. The received signal is weaker than the transmitted one.
If the dispenser is empty, the light beam in the prism is reflected. The received signal is the same as the transmitted signal.
The module evaluates the received signal and the refill indicator LED is actuated.
A
Transmitter diode
B
Receiver diode
C
Prism
A
Transmitter diode
B
Receiver diode
C
Prism
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4.10 Dispenser
The release mechanism is activated by an actuator (C). When the actuator is actuated for the first time, the detergent-dispenser cover is opened. At the same time the release pawl engages with the switching core (B) of the rinse-aid lever so that when the actuator (C) is activated again, the dosing plunger (A) is lifted off the rinse aid.
Technical specifications Value Unit
Rinse aid capacity 120 ml
Setting 1–6 1 each ml
Detergent capacity max. 45 g
See Actuator for additional technical specifications.
A
Dosing plunger
D
Magnetic float
B
Switching core
E
Reed contact (optional)
C
Actuator
F
Optical sensor (optional)
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4.11 Instantaneous water heater
The instantaneous water heater is installed in the water circuit for the spray arms. When the detergent solution flows through the instan­taneous water heater, a rubber membrane (B) attached to the flange actuates the safety pressure switch (D) for the heating element (C). If the pressure drops, the heater switches off. The heating position is overtravelled, preventing dry heating.
Technical specifications: Designation Value Unit
Nominal voltage 230–240 V
Frequency 50 Hz
Power 2150 W
Resistor approx. 22
Ω
A “Clicking” safety device / NTC; 85 °C safety switch E From the circulation pump B Membrane F To the lower spray arm C Heating element G To the upper spray arm
D Safety pressure switch
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