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MELSEC-A
14 TROUBLESHOOTING
Error
code
Servo
amplifier
LED display
Name and definition Occurrence factor
SSCNET cable is disconnected.
SSCNET cable fault.
Printed board fault
2036 36
Transfer error
Command cable fault
The terminal connector is disconnected.
1. Parameter data corrupted.
2037 37 Parameter error
2. Parameter data mis-setting
1. Servo amplifier faulty (rated output exceeded).
2. Power ON/OFF repeated in overload state.
2045 45 Main circuit device overheat
3. Cooling fault.
1. Servomotor overloaded.
2. Servomotor ambient temperature exceeded the operating
temperature of 40°C.
3. Thermal protector built in the encoder is faulty.
2046 46 Servomotor overheat
4. Cooling fan faulty.
1. Current exceeded the continuous output current of the servo
amplifier.
2. Servo system is instable to cause hunting.
3. Machine struck something.
4. Servomotor mis-wiring.
Servo amplifier terminals U, V, W do not match servomotor
terminals U, V, W.
2050 50
Overload 1
About 200% of overload current flew
continuously.
5. Encoder faulty.
1. Machine struck something.
2. Servomotor mis-wiring.
Servo amplifier terminals U, V, W do not match servomotor
terminals U, V, W.
3. Servo system is instable to cause hunting.
4. Bus voltage in the servo amplifier low.
2051 51
Overload 2
Max. current flew for several seconds.
5. Encoder faulty.
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