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Maintenance
2019/11
010-917_SON_EN
Temperature fault Winding temperature switch has
triggered
Self-resetting when motor has cooled down, acknowledge
fault message with alarm key, please contact Customer
Services if further temperature fault messages are issued
Undercurrent
The minimum current of the pump is
not being reached. (The cable from
the control unit to the motor could be
interrupted or damaged)
Check cable and repair if necessary
Replace pump if faulty
Overcurrent
The maximum current of the pump
has been exceeded. (e.g. blockage)
Remove blockage (heed the safety instructions)
Replace pump if faulty
Relay error
Power contactor is no longer
switching
Switch the voltage supply for the control unit off and have
the power contactor replaced by Customer Services
Messages on the “Auto Mix & Pump” control unit, system type F
Display
Cause
Action(s)
Rotary field fault Wrong rotary field for mains
connection
Connect rotary field correctly.
Actuator valve
fault
Actuator valve limit switches are not
being reached
Check limit switch connections
Check valve for blockages
Motor protection Motor protection switch has triggered.
Current value for pump not set
correctly
Set current value correctly
Motor current too high due to faulty or
blocked pump.
Remove blockage (heed the safety instructions)
Increased current due to phase failure Check the mains connection for phase failure
Phase fault
One of the phases is no longer
available
Check mains connection on the control unit
Check fault-current circuit breaker
Relay switching
cycles
Power contactor has carried out more
than 100,000 switching cycles
Message can be acknowledged. Message appears again
after a further 1,000 operating cycles. Have the power
contactor replaced by Customer Services
Temperature
fault
Winding temperature switch has
triggered
Self-resetting when motor has cooled down, acknowledge
fault message with alarm key, please contact Customer
Services if further temperature fault messages are issued
Undercurrent
The minimum current of the pump is
not being reached. (The cable from
the control unit to the motor could be
interrupted or damaged)
Check cable and repair if necessary
Operate the pump counterclockwise briefly (“Maintenance”
--> “Manual operation” --> “Counterclockwise”)
Replace pump if faulty
Overcurrent
The maximum current of the pump
has been exceeded. (e.g. blockage)
Remove blockage (heed the safety instructions)
Operate the pump counterclockwise briefly (“Maintenance”
--> “Manual operation” --> “Counterclockwise”)
Replace pump if faulty
Relay error
Power contactor is no longer
switching
Switch the voltage supply for the control unit off and have
the power contactor replaced by Customer Services
