Checking The Regeneration Valve - Bosch SPS40C12GB Repair Instructions

Test
5.7

Checking the regeneration valve

5.7.1 Checking the function and tightness of the
regeneration valve
1.
If there is salt on the cover of the water-softening system,
check that it is not leaking.
Use the customer service test programme to check the regeneration valve.
2. Examine the component visually for leaks.
5.7.2 Checking the regeneration valve electrically
For measurements, see the circuit diagrams.
Prerequisite:
• Appliance is disconnected from the power supply.
• Appliance is freely accessible.
• Left-hand side panel has been removed. (Page 115)
Plug contacts may be damaged!
► Check the plug contact. (Page 40)
2016-03-02 / DIS 840_58300000176874_ara_en_c
1. Release the electrical connector to the regeneration valve (1) and unplug it (2).
2. Measure the resistance of the regeneration valve.
3. 0 If the resistance does not agree with the value given in the circuit diagram
► replace the defective regeneration valve. (Page 107)
4. 0 If the resistance does agree with the value given in the circuit diagram
► check the line resistance R at the plug-in connections
5. 0 If the line is defective (R > 0)
► replace the defective cable harness.
6. 0 If the line is intact (R = 0)
► replace the defective power module. (Page 91)
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