Explanation Of The Display Indications; Description Of Faults And Troubleshooting - Kerbl HAPPYCOW Duo Mode D'emploi

6.3.4 Explanation of the display indications

Description of display messages:
Display indication Description
No display
--- Unit ready for operation
A00 Undervoltage
A01 Overvoltage
A02 Maximum running time exceeded - control unit has not switched off for 20 minutes (sensor faulty/incorrectly set)
A03 Brushes blocked repeatedly
A05 High temperature in control box (> 60 °C)
A06 Low temperature in control box (< -30 °C)
A08 Motor overheating

7. Description of faults and troubleshooting

Before any repair work and in particular before commissioning third parties with repair work, the manufacturer must be contacted in order to do-
cument the repair with a service number. In particular, no costs will be covered if repairs are undertaken without first contacting the manufacturer
and without a service number!
A number of functional errors are listed below which can occur as a result of wear, machine defects, particularly challenging operating conditions, incor-
rect operation or a lack of maintenance. Methods are also described which are aimed at finding and eliminating the problems:
Danger!
• Only open the control unit and carry out maintenance work on the entire machine when the mains plug is disconnected!
• Work on the control unit, sensor board, motor and electrical cables may only be carried out by a qualified electrician.
• In the event of a fault, the mains plug must be disconnected first. The fault must be eliminated only by authorised personnel.
Fault
Display without indicator
Display indicator: A00
– Undervoltage
The brush does not rotate and
the display shows the alarm
"A00".
Display indicator: A01
– Overvoltage
The brush does not rotate and
the display (briefly) shows the
alarm "A01".
No mains voltage present
Cause
The socket is not live.
Fuse 6, 3 A (Fig. 8; item 3+4) on the
circuit board has burned through or
has come loose.
Fuses trip after the unit is operated.
-> Motor short circuit or broken motor
cable
Main board in control unit defective.
Mains voltage too low.
Mains voltage too high.
Corrective measure
• Is the fuse in the sub-distribution unit intact?
• Disconnect the control unit from the mains and secure it against
being switched on again.
• Check the secure position of the fuses. Replace defective fuses.
(Fig. 8 – item 3+4)
• If there is no indication on the display when restarting with
replaced fuses, then the main board is defective.
• Have the motor and motor cable checked by a qualified elec-
trician
• Replace the main board.
• Have the mains checked by a qualified electrician.
• Check whether the mains voltage is above 200 V.
• Ensure that no other major consumers are supplied via the same
current circuit / fuse.
• Have mains voltage peaks measured by a qualified electrician.
• > 260 V, find the causes of these peaks and eliminate them.
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