Nord Drivesystems SK 300P Series - FAQ Operational Problems; Table 3: FAQ Operational Problems

NORDAC ON / ON+ (SK 3xxP) – Manual with installation instructions
130 BU 0800 en-4521
6.3 FAQ operational problems
Fault Possible cause Remedy
Device will not start
(all LEDs off)
• No mains voltage or wrong mains
voltage
• Check connections and supply
cables
• Check switches / fuses
Device does not react to
enabling
• Control elements not connected
• Incorrect control word source setting
• Right and left enable signals present
simultaneously
• Enable signal present before device
ready for operation (device expecting a
0  1 edge)
• Reset enable
• Change over P428 if
necessary: "0" = device
expecting a 01 edge for
enable / "1" = device reacts to
"Level" 
Danger: Drive can start up
independently!
• Check control connections
• Check P509
Motor will not start in spite of
enable being present
• Motor cables not connected
• Brake not ventilating
• No setpoint specified
• Incorrect setpoint source setting
• Check connections and supply
cables
• Check control elements
• Check P510
Device switches off without
error message when load
increases (increased
mechanical load / speed)
• Mains phase missing
• Check connections and supply
cables
• Check switches / fuses
Motor rotates in the wrong
direction
• Motor cable: U-V-W incorrectly
connected
• Motor cable: Change 2 phases
• Alternative:
– Check motor phase
sequence (P583)
– Change Enable right/left
functions (P420)
– Change control word Bit
11/12 (for bus control)
Motor not reaching required
speed
• Maximum frequency parameter setting
too low
• Check P105
Motor speed does not
correspond to the setpoint
specification
•
Setpoint specification via BUS IO Bit is
not correct
• Check P465
• Check P509 / P510
• Check P546
• P104/ P105
Check “Min./ max.
–frequency”
Motor generating a
considerable amount of
noise (at the current limit)
and "OFF" signal is
implemented at slow speed
with little or no control,
possibly with error message
3.0
• Tracks A and B swapped round by
encoder (for speed feedback)
• Incorrect encoder resolution setting
• Encoder power supply missing
• Encoder faulty
• Check encoder connections
• Check P300, P301
• Monitor via P735
• Check encoder
Table 3: FAQ operational problems