12. Functions sequences
12
Service
manual
487 03 29 91
12.12
Faults and corrective action required
Faults indecated by flashing yellow light
Fault Possible cause Action
1. The extractor will not start. Yellow Reed element ring in the deck is Disconnect main power supply to
light flashing. defective extractor. Check that the two
connentions of the Reed ring to the
circuit board for automatic functions are
OK. If they are sound, replace the Reed
ring.
2. The extractor has switched to The Reed in the deck or the micro- Disconnect main power supply to
braking during extraction. The switch SW1 has developed a defect extractor. Check that the two connections
extractor will not restart. during extraction. of the Reed ring to the circuit board for
automatic functions are OK. If they are
sound, replace the Reed ring. Check that
the microswitch SW1 is OK.
3. The yellow light starts flashing upon The Hall element of the is Disconnect main power supply to
braking. The brake switches off and defective. extractor. Check the 3-pole connection
the extractor remains locked. to the circuit board. If this is sound,
replace the motor.
4. No signal comes from the machine´s • The microswicth of the rotation Disconnect main power supply to
mechanical rotation guard upon guard has stuck in its rest position. extractor. Remove cover of automatic
braking (at the point where the drum control unit. Open extractor lid manually
begins to rotate anticlockwise). • The motor brake pads are worn by pressing the yoke of the traction
magnet upwards.
The drum rotates anticlockwise for • The microswitch of the rotation
approx. 1 1/2 minutes and then guard has moved from its position. Connect a multimeter between
braking switches off and the yellow connections 502 AC and 503 AC (S1:2-7)
light starts to flash (time varies Turn the drum anticlockwise by
according to machine type, load and hand. If the rotation guard is sound the
frequency). meter should react.
The extractor´s lid remains locked. If the meter does not react - check the
contacts in the 4-pole connection block
X8/X9) and the 3-pole connection block
X10/X11.
If contact is correct from X10 to S1
replace the motor.
5. The signal from the machine´s The rotation guard microswitch has Disconnect main power supply to
mechanical rotation guard is burnt out in the active position. extractor. Remove cover of control unit
constantly active. Braking switches Open extractor lid manually by pressing
off immediately. The extractor lid the yoke of the traction magnet
remains locked. upwards.
The yellow light flashing after Connect a multimeter between
approx. 1 1/2 minutes. connections 502 AC and 503 AC (S1:2-7)
If the rotation guard is sound the meter
should react.
if the meter does not react - check wires
and connection blocks X8/X9 and
X10/X11 for short circuits.
If there is no short circuit in the control
unit, the microswitch in the
motor is faulty-
replace the motor.
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