Wascomat EXSM 230 S Operating & Maintenance Manual page 84

84
Error code/symptoms
Display blank, but machine is
working otherwise.
F2, F3
Display
1 7
X72
X172
1
7
PCB transformer T10
Trouble shooting
Fault-finding
Turn the machine's wall switch off and on again.
Fault persists.
Check glass-tube fuses F2 and F3 on program
control unit PCB. Rating: 1 A/250 V.
Fuses sound
Check that input voltages to PCB are correct. At
connector X72, measure between the following
inputs:
2316
X72:1 - 2
X72:2 - 3
X72:6 - 7
An incorrect voltage
Remove connector X172 on transformer T10.
Measure the voltages between the following
outputs on the transformer board.
5 - 6 ca 1,75 V ~
6 - 7 ca 1,75 V ~
2316
1 - 2 ca 13,5 V ~
Voltages correct
3348
Machine working
Fuse fault
ca 1,75 V ~
ca 1,75 V ~
ca 13,5 V ~
Voltages correct
An incorrect voltage
Cause/Action
Transient fault. No action
required.
Change fuse(s) and check
functioning.
Program control unit PCB
faulty. Replace PCB.
Replace transformer T10.
Fault in wiring between
transformer and circuit board.
Check wiring and replace if
necessary.