Fault Messages And Troubleshooting - Graf ONE2CLEAN Manual

FAULT MESSAGES AND TROUBLESHOOTING

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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:
A. Power failure (system is de-energised)
B. Power returned (system is supplied with power again)
C. Compressor has overcurrent
D. Compressor power supply too low
E. 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**
Manual operation
Possible cause Remedy
• Power failure • Check the power supply to the system and to the control system
• System turned off • Turn system back on
• There is no voltage • Check supply to the control cabinet
at the control cabinet • Wait for resumption of power supply
• Turn system off and back on again after 10 seconds
• Power available
again
• Internal clock/date • Set date and time via menu item
not set
• Short-circuit • Check supply to the control cabinet
• Compressor does not • Check the compressor in manual mode
work / is not
receiving power
• System was
activated manually
in manual mode
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