Kollmorgen AKD Fault Card

Fault
(“F”)
Warning
(“n”)
Message/Warning Cause Remedy Drive
Respons-
e to Fault
F501
n501
Bus over voltage. Bus voltage too high.
Usually, this problem is
load related.
Reduce load or change
motion profile. Check sys-
tem regen capacity; add
capacity if needed. Check
mains voltage.
Disable
power
stage
F502 Bus under voltage. Warn-
ing issued prior to fault.
Bus voltage below
threshold value.
Check mains voltage. Controlled
stop
F503 Bus capacitor over-
loaded.
Single phase AC input
on a drive only rated for
three-phase input or
excessive single-phase
power load.
Check mains voltage. Controlled
stop
F504-
F518
Internal supply voltage
fault
Internal supply voltage
fault detected
Check wiring for elec-
tromagnetic compatibility
(EMC). If issue persists
exchange drive.
F519 Regen short circuit. Regen resistor short cir-
cuit.
Regen IGBT short circuit.
Contact technical support.
Disable
power
stage
F521
n521
Regen over power. Too much power stored
in regen resistor.
Either get larger regen res-
istor or use DC bus sharing
to dissipate power.
Disable
power
stage
F523 Bus over voltage FPGA. Bus over voltage hard
fault.
Check mains voltage and
check system brake capa-
city.
Disable
power
stage
F524
n524
Drive Foldback. Maximum drive power
has been exceeded.
The power has been lim-
ited to protect the drive.
Motion requires too much
power. Change profile to
reduce load .
Controlled
stop
F525 Output over current. Current exceeds drive
peak.
Check for short or feed-
back faults.
Disable
power
stage
F526 Current sensor short cir-
cuit.
1. Current sensor short
circuit. 2. Motor cable
plugged in upside down
1. Restart drive. If issue
persists, contact technical
support. 2. Plug in cable
right-side up.
Disable
power
stage
F527 Iu current AD converter
stuck.
Hardware failure detec-
ted.
Restart drive. If issue per-
sists, contact technical
support.
Disable
power
stage
F528 Iv current AD converter
stuck.
Hardware failure detec-
ted.
Restart drive. If issue per-
sists, contact technical
support.
Disable
power
stage
AKD Fault Card | 2 Fault and Warning Messages
Kollmorgen | kdn.kollmorgen.com | November 2019 22

Kollmorgen AKD Specifications

General

Control Modes	Torque, Velocity, Position
Communication Interfaces	EtherCAT, CANopen
Feedback Options	Resolver
Safety	STO (Safe Torque Off), SS1 (Safe Stop 1)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature
Operating Temperature Range	0°C to 55°C
Humidity	5% to 95% non-condensing