Error 23 (Ff): Fan Failure; Error 24 (Pdr): Pump Dry; Error 25 (Col -): Command Value Lost; Error 26 (Sto-R): Sto Request - Bosch rexroth EFC 610 Series Operating Instructions Manual

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Diagnosis

13.4.10 Error 23 (FF): Fan Failure

Possible reason
Fan defect

13.4.11 Error 24 (Pdr): Pump Dry

Possible reason
PID feedback is excessively low while con-
verter is running at output frequency high
limit

13.4.12 Error 25 (CoL -): Command Value Lost

Possible reason
Panel potentiometer frequency setting
command value lost

13.4.13 Error 26 (StO-r): STO request

Possible reason
STO function is activated correctly in run-
ning mode, after re-energized input chan-
nels and reset the device, the device goes
to normal state

13.4.14 Error 27 (StO-E): STO error

Possible reason
STO function is activated incorrectly, it
happens if one channel is energized but
the other is deenergized
Bosch Rexroth AG R912005854_Edition 09
Rexroth Frequency Converter EFC x610
Solution
Check if the fan is blocked
●
Clear the fan or replace it
Fan control circuit error
●
Replace the circuit board or converter, contact with
service
Solution
● Check if the feedback signal is valid
● If the PID control is used for controlling a water pump,
check if the pump is running without water
Solution
Check if the panel is installed stably
●
Reinstall the panel
Check if the extended line for the panel is broken
●
Replace the extended line for the panel
The panel is broken
●
Contact with service
Solution
Check the signal of STO input terminal
Solution
Check the signal of STO input terminal
Series