Bosch WTA34 Series Repair Instructions - Page 7

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TUMBLE DRYER
V.
REPAIRS
1.
Troubleshooting
When implementing troubleshooting procedures, please comply with the following:
All test programmes should be run.
If "Test component" is indicated in the Procedures column of the troubleshooting
table the components are to be tested in accordance with their electrical specification.
To test the component, remove the plug from the power module.
Check that the plug-and-socket connections are properly attached.
If electronic modules are replaced, note down the result of the test programs on the
appropriate label.
When handling electronic modules, comply with the EGB handling regulations.
Put the replaced electronic modules back into the original packaging.
Error
Error display
no.
1
"Drying" LED flashes
in the progress
indicator = NTC fault
(NTC R4)
2
"Iron dry" LED
flashes in the
progress indicator =
NTC fault (NTC R2)
3
"Cupboard dry" LED
flashes in the
progress indicator =
NTC fault (NTC R2)
4
"Extra dry" LED
flashes in the
progress indicator =
overheating
r120085e -15/7
04.99
Possible cause
A
Appliance ambient
temperature < 0 C.
B
NTC R4, cable or plug-and-
socket connection defective.
C
Power module defective.
NTC R3, cable or plug-and-
socket connection defective. See Error number 1.
NTC R2, cable or plug-and-
socket connection defective. See Error number 1.
A
Fluff filter blocked.
Test / Procedure
Customer instruction:
Do not operate the
appliance below 0 C.
Remove the cable from the
power module. Test NTC,
cable and plug-and-socket
connection.
If 1 A and 1 B are o.k., start
"BW cupboard dry" test
program. If LED in the
progress indicator displays
NTC fault, replace the
power module.
Clean the fluff filter.