WTC 600 LP / MP

APPENDIX

3.5Operating failures/failure messages

The control system is able to detect operating failures during OPERATION and DISINFECTION and to display them. Usually, the unit will be stopped if a failure occurs. However, operating settings exist for the failures CY EXCEEDED and HARDWATER which make it possible that such a failure is only displayed without interruption of the production. During the operating mode DISINFECTION, only a MOTOR FAILURE can be detected.

The different operating failures/failure messages as well as their reasons and consequences are as follows:

Denomination

Reason

Consequence

 

 

 

CY EXCEEDED

Cy perm> LIM

Unit switches off if ps LIM

 

 

high = switch-off

 

 

 

FORCED STOP

FORCED STOP active

Unit switches off

 

 

 

MOTOR FAILURE/HARD

MOTOR FAILURE/

Unit switches off

WATER

LIMITENT CONTACT

 

 

active

 

 

 

 

LACK OF PRESSURE

PRESSURE SWITCH active

Unit switches off

 

 

 

 

 

 

 

 

 

 

 

 

MAINTENANCE

When the preset maintenance interval is over, the LED display OPERATION starts to flash (but only if control system is in the operating conditions DISPOSAL, PRODUCTION ON, CONCENTRATE DISPLACEMENT/FLUSH or DISCONTINUOUS RINSE. This alarm message can only be switched off by a technician who has then to enter a new maintenance interval (see item 4.4.4).

Besides the above mentioned failures also other types of failure exist. These are erroneous calibration ranges (failure message on text display), internal system failures (flashing FAILURE light) and initialization failures (EEPROM fail message in text display immediately after having switched the system on or during operation). As these failures correspond to malfunctions which the user cannot repair, the supplier has to be informed immediately if such failures occur.

ATTENTION !!! As an internal system failure will interrupt program run, failures will not be monitored. Such a control system must not be used any more.

Service Handbook 08.2004

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Karcher 600 CD manual Operating failures/failure messages, Denomination Reason Consequence, Forced Stop active

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