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

NORDAC ON / ON+ (SK 3xxP) – Manual with installation instructions

6.3 FAQ operational problems

Fault
Device will not start
(all LEDs off)
Device does not react to
enabling
Motor will not start in spite of
enable being present
Device switches off without
error message when load
increases (increased
mechanical load / speed)
Motor rotates in the wrong
direction
Motor not reaching required
speed
Motor speed does not
correspond to the setpoint
specification
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

Table 3: FAQ operational problems

130
Possible cause
• No mains voltage or wrong mains
voltage
• 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)
• Motor cables not connected
• Brake not ventilating
• No setpoint specified
• Incorrect setpoint source setting
• Mains phase missing
• Motor cable: U-V-W incorrectly
connected
• Maximum frequency parameter setting
too low
• Setpoint specification via BUS IO Bit is
not correct
• Tracks A and B swapped round by
encoder (for speed feedback)
• Incorrect encoder resolution setting
• Encoder power supply missing
• Encoder faulty
Remedy
• Check connections and supply
cables
• Check switches / fuses
• 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
• Check connections and supply
cables
• Check control elements
• Check P510
• Check connections and supply
cables
• Check switches / fuses
• 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)
Check P105
•
• Check P465
Check P509 / P510
•
• Check P546
• P104/ P105 Check "Min./ max.
–frequency"
• Check encoder connections
• Check P300, P301
Monitor via P735
•
• Check encoder
BU 0800 en-4521