Kerbl CowCleaner 18700, Operating Instructions Manual

Page: 48 / 196

48
Fault Cause Corrective measure
Display indicator: A02
- Maximum run time exceeded
The control unit has not swit-
ched off for 20 minutes (sen-
sor faulty/incorrectly set)
The motor turns continuously
for 20 minutes (with brief pauses bet-
ween the work cycles).
The display then shows
alarm "A02".
• Check the setting of the contact switch. The contact pin must
be pushed into the rest position. If necessary, adjust the contact
switch or bracket and restart the machine.
Main board in control unit defective. • Replace the main board.
Motor cable broken.
• All wires of the motor cable have continuity?
• External insulation intact?
• Replace motor cable if damaged.
Display indicator: A03
– Brushes blocked repeatedly
The unit reverses its direction
of rotation several times in
succession and then remains
stationary.
The motor has been stopped mechani-
cally or blocked by a foreign body.
• Remove the foreign body.
Main board in control unit faulty. • Replace the main board.
Gears faulty or contain braking mecha-
nical parts. (e.g. gear wheel breakage
due to a lack of oil)
• Contact the manufacturer.
• Replace the motor and gears.
Capacitor faulty.
• Have the capacitor checked by a qualified electrician and re-
placed if necessary.
Motor cable broken.
• All wires of the motor cable have continuity?
• External insulation intact?
• Replace motor cable if damaged.
Display indicator: A05
– Overheating of the circuit
board in the control unit (>
60 °C)
Control unit exposed to direct sunlight. • Protect the control unit from sunlight.
Motor cable broken.
• All wires of the motor cable have continuity?
• External insulation intact?
• Replace motor cable if damaged.
Capacitor faulty.
• Have the capacitor checked by a qualified electrician and re-
placed if necessary.
Display indicator: A06
– Low temperatures of the cir-
cuit board in the control unit
(< -30 °C)
Low temperature on the circuit board
in the control unit.
• Take the unit out of operation and switch it on again when the
outside temperature rises again.
Display indicator: A08
– Motor temperature switch
tripped
The motor temperature switch has trip-
ped. (not present on all types!)
• Disconnect the unit from the mains, let it cool down and restart
it.
• Check that the bridge or plug on the main board is seated pro-
perly. (Fig. 7)
Display indicator: - - -
Control unit ready for ope-
ration
Unit does not start the brus-
hing cycle.
Contact switch faulty.
• Check the contact switch (Fig. 10; item 4 + Fig. 13; item 6.5).
• Is the contact switch's contact pin pushed into the rest position?
• If the contact pin is audibly released when the brush is raised:
• Check the motor cable and replace if necessary
• Check the motor
Motor cable broken.
• All wires of the motor cable have continuity?
• External insulation intact?
• Replace motor cable if damaged.
Motor faulty. • Have the motor checked by a qualified electrician.
The brush does not reverse its
direction of rotation when it is
placed under load.
The brush resistance setting is not
correct.
• Adjust the cut-off resistance, see Section 6.
• If the unit does not switch off with an appropriate load with any
of the settings, the main board is defective.
Main board defective. • Replace the main board.