Mitsubishi MELDAS MDS-C1 Instruction Manual page 253

Power supply alarm
LED
No. Alarm name
display
60 Instantaneous power failure
61 Power module overcurrent
62 Frequency error
63 Auxiliary regeneration error
65 Rush relay error
67 Phase failure
68 Watch dog
69 Ground fault
6A External contactor melting
6B Rush relay melted
6C Main circuit error
6D Parameter error
6E Memory error
6F Power supply error
71 Instantaneous power failure/
external emergency stop
73 Over-regeneration
74 Regenerative resistor
overheat
75 Overvoltage
76 External emergency stop
setting error
77 Power module overheat
(Note 1) If a power supply alarm (60 to 77) occurs, all servos will stop with the dynamic brakes.
(Note 2) CV indicates an alarm that occurs with the MDS-C1-CV unit, and CR indicates an alarm that occurs with the MDS-A-CR
unit.
(Note 3) "b", "C" and "d" displayed on the power supply unit's LED as a solid light (not flickering) do not indicate an alarm.
6. Troubleshooting
CV CR
A drop in the 24VDC power was detected.
The power module's overcurrent protection function activated.
The input power frequency exceeded the specified range.
The auxiliary regenerative transistor is still ON.
The rush resistance short-circuit relay does not turn ON.
There is a phase failure in the input power.
The system is not operating normally.
The motor power cable is contacting FG (ground).
The external contactor's contact has melted.
The rush resistance short-circuit relay does not turn OFF.
An abnormality was detected in the main circuit capacitor's charging
operation.
The power supply unit's capacity is not appropriate for the regenerative
resistor type set with the parameters.
An error was detected in the internal memory.
The power supply is not connected, or an error was detected in the
power supply's A/D converter.
This is detected simultaneously if another power supply alarm occurs.
An instantaneous power failure occurred.
The over-regeneration detection level exceeded 100%. The
regenerative resistor is in the overload state.
The temperature protection function in the regenerative resistor
activated.
The main circuit PN bus voltage exceeded the tolerable value.
The rotary switch setting for the external emergency stop does not
match the parameter setting.
The power module's temperature protection function activated.
6 - 8
Alarm details Reset
PR
PR
PR
PR
PR
PR
AR
PR
PR
PR
PR
PR
AR
AR
NR
PR
PR
NR
AR
AR