Code
Fault
Possible cause
Suggested solution
Resetting
62
Speed difference
• Speed difference situation
detected
• Load measured too low in
ESR use
• Mechanical failure e.g. in
gear
• Interference or missing
signal in ENC1A
• Sensor channels ENC2A-B
connected wrong way
• Interference or missing
signal in ENC2A-B
• Check supply voltage
• Check load measurement
operation and calibration
• Check hoist operation
without load
• Check sensor cable
grounding and inverter PE-
connections
• Check/replace speed sensor
connected to ENC1A
• Swap connections between
ENC2A and ENC2B
• Check/replace speed sensor
connected to ENC2A-B
A
63
Stall
• Motor does not run.
Mechanical failure e.g. in
gear
• Missing signal in ENC1A
• Check/replace motor
• Check/repair motor wiring
• Check hoist operation
without load
• Check/replace speed sensor
connected to ENC1A
A
64
Relay
• Error detected in ROB1
relay, test circuit or the main
contactor
• Check main contactor circuit
wiring
• If problem recurs replace
inverter
A
71
Brake control
• Error detected in brake
control circuit
• Check/repair brake control
circuit wiring
• Check brake coil resistance
• Replace brake if not ok
• If problem recurs replace
inverter
A
73
Both
Direction
Commands Active
• S1 and S2 controls active at
the same time
• Fault in control circuit/
controller
• Check/repair control circuit
wiring
• Check/replace pendant
controller
C
77
CRC
• Internal safety parameter
fault
• Switch off supply voltage
• If problem recurs, replace
inverter
B
020145en / Revision D / 2015-04-29
29/31
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reproduced, disclosed to other parties, altered or otherwise employed in any manner whatsoever without the express written consent of Konecranes Plc.
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(2014) Konecranes Plc. All rights reserved.
