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1. DELCOS 3100 Electronics
[Display] / Problem
Possible Cause
Remedy
27
[FAULT SR-DRIVE (18)]
Negative current conversion
through current sensor.
Motor cable incorrectly laid through current
sensor.
Check connection of motor phases at
power electronics and check for correct
installation through the current sensor.
Motor incorrectly connected.
Check cabling and plug of current
sensor as far as control board J10.
Current sensor incorrectly connected or not
connected to control board.
Make sure that current sensor is
connected to phase A of control board.
Current sensor or cabling faulty.
Control or gate drive board faulty.
Otherwise contact Gardner Denver
Service.
Motor insulation fault.
Mains voltage too high.
Make sure that the phase-to-phase
voltages do not exceed 506 V.
[FAULT SR-DRIVE (19)]
Overvoltage in intermediate
direct-current circuit
Motor insulation fault.
Otherwise contact Gardner Denver
Service.
Control or gate drive board faulty.
[FAULT SR-DRIVE (20)]
System setting(s) incorrect.
Error in basic initialisation.
Contact Gardner Denver Service.
One or more faulty electrolyte capacitor(s) or
balancing resistor.
Check connection of balancing
resistors.
[FAULT SR-DRIVE (21)]
Capacitor voltage not
symmetrical.
Control or gate drive board faulty.
Ribbon cable faulty between control board
(PCB94) and gate drive board (PCB95).
Check ribbon cable between control
board (PCB94) and gate drive board
(PCB95).
Cabling fault in intermediate circuit.
Otherwise contact Gardner Denver
Service.
Gate drive board J8 plug not connected.
Break at plug, gate drive board J8,
terminal 1 and 2.
Check connection at plug, gate drive
board J8, terminal 1 and 2.
[FAULT SR-DRIVE (22)]
Plug of measuring facility for
intermediate circuit not
connected.
Ribbon cable faulty between control board
(PCB94) and gate drive board (PCB95).
Check ribbon cable between control
board (PCB94) and gate drive board
(PCB95).
Control or gate drive board faulty.
Otherwise contact Gardner Denver
Service.
Open circuit between Delcos and emergency-
OFF.
Check connection of emergency-OFF
contact at Delcos (terminal 22 and 23).
Faulty emergency-OFF switching element.
Check emergency-OFF contacts.
[FAULT SR-DRIVE (23)]
Emergency-OFF safety input
open, however no shutdown by
Delcos 3100.
Otherwise contact Gardner Denver
Service.
[FAULT SR-DRIVE (24)] Shut-
down by safety logic (watchdog)
Control board faulty.
Contact Gardner Denver Service.
[FAULT SR-DRIVE (25)]
Main contactor monitoring
A main contactor is not installed. Occurrence
of this fault, therefore, points to a wiring fault
or a malfunction on the control or gate drive
board.
Check connections at control board
J11, terminal 3 and 6, to gate drive
board J15, terminal 4 and 5.
Otherwise contact Gardner Denver
Service.