Fault Messages And Troubleshooting - Graf one2clean Manual De Instrucciones

6. Fault Messages and Troubleshooting

Technical problems of system operation (failure of a unit) are visually displayed.
6.1 System Behaviour after switching off the Power Supply
If the system is disconnected from the mains (e.g. power failure), the control program and the counted
operating hours are retained due to the memory of the control system. The red LED will light up. When the
system is supplied with power again, it will self-start.
NOTE: If the system is disconnected from the mains for more than 24 hours, cleaning of the existing
wastewater is not or is only possible to a very limited extent.
6.2 Fault Message in the Display
Faults are shown as text or as numbered codes on the liquid crystal display. The operating control lamp
then lights up red.
The numbered fault codes are explained below:
6. Power failure (system is de-energised)
7. Power returned (system is supplied with power again)
8. Compressor has overcurrent
9. Compressor power supply too low
10. Manual operation
The displays no. 2 (power returned) and no. 5 (manual mode) are not faults in the proper sense. These
are only registered as fault messages for better time limitations of any faults that occur and for monitoring
manual activities on the control system.
Table 2: Fault Causes and Troubleshooting
Display
Mains failure
No display, no light
No display, light is green
Mains returned
Set the clock
Compressor **overcurrent**
Compressor **current too low**  Compressor does not
Manual operation
6. Fault Messages and Troubleshooting
Possible cause
 Power failure
 System turned off
 There is no voltage
at the control cabinet.
 Power available
again
 Internal clock/date
not set
 Short-circuit
work / is not receiv-
ing power
 System was activat-
ed manually in man-
ual mode
Remedy
 Check the power supply to the system and to
the control system
 Turn system back on
 Check supply to the control cabinet
 Wait for resumption of power supply
 Turn system off and back on again after 10
seconds
 Set date and time via menu item
 Check supply to the control cabinet
 Check the compressor in manual mode
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