Code Fault Possible cause Suggested solution Resetting
61 Overspeed • Overspeed situation detected
• Interference in speed signal
connected to ENC1A
• Check supply voltage
•
Check load measurement
operation and calibration
• Check sensor cable
grounding and inverter PE-
connections
• Check/replace speed sensor
connected to ENC1A
A
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
R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
32/34
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
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