Mitsubishi Electric C70 Setup Manual page 597

MITSUBISHI CNC
Appendix 2 Explanation of Alarms
Alarm No.
Power supply: Main circuit error
6C
An error was detected in charging operation of the main circuit capacitor.
Investigation details
Check the CHARGE lamp state when the
1
alarm occurs.
Disconnect the power supply unit's PN
terminal block wiring, and measure the
resistance value at 1) and 2) shown
below.
Power supply
Drive unit unit
2)
P
2
N
Note)
When disconnecting the PN wiring, turn
OFF the power, make sure the CHARGE
lamp has turned OFF at contactor OFF and
then wait at least fifteen minutes before
disconnecting. Do not disconnect
immediately after the power OFF.
Alarm No.
Parameter setting error
6D
An error was detected in the parameter sent from the drive unit.
Investigation details
1 Check the repeatability.
Check if there is any abnormality in the
2 unit's ambient environment.
(Ex. Noise, grounding, etc.)
Alarm No.
Power supply: Memory error/AD error
6E
An error was detected in the internal memory or A/D converter.
Investigation details
1 Check the repeatability.
Check if there is any abnormality in the
2 unit's ambient environment.
(Ex. Noise, grounding, etc.)
Alarm No.
Power supply error
6F
No power supply is connected to the drive unit, or a communication error was detected.
Investigation details
Check the LED display on the power supply
1
unit.
2 Check the rotary switch setting.
Check the communication cable (CN4)
3
connected with the drive unit.
(Note) Alarm 6F is detected at the same time other power supply alarms occur.
580
Investigation results
[1] The light of the lamp becomes faint.
[2] An alarm occurs when ready is turned
ON again.
The lamp turns ON instantly, but when the
alarm occurs and the contactor turns OFF,
the lamp turns OFF immediately.
The lamp never turns ON.
1)The power supply unit side is abnormal.
2)The drive unit side is abnormal.
1) and 2) are both
normal.
1)
Tester
Polarity
measure-
Normal
ment point -
+
(
P N Several 100Ω
1)
N
P ∞Ω
Several 100Ω
P N
2)
N P ∞Ω
Investigation results
The alarm occurs each time after the power
is turned ON.
The alarm occurs occasionally.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
The alarm occurs each time READY is
turned ON.
The alarm occurs occasionally.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
"F" is flickering.
Another alarm code is flickering.
"0" is displayed.
"F" is displayed.
"8" is displayed.
"b", "C", "d" is displayed.
Something else is displayed.
0 or 4 is set.
A value other than the above is set.
There is a problem with the wiring or shield. Replace the cable.
There is no problem.
Remedies
Replace the power supply unit.
Check the investigation item No. 2.
Check the investigation item No. 2.
Then replace the unit.
Replace the power supply unit.
Disconnect the PN wiring, and then check
the drive unit side.
Abnormal
Replace the power supply unit.
Short-circuit/∞Ω
Several 100Ω
Short-circuit/∞Ω
Several 100Ω
Remedies
Replace the unit.
Check the investigation item No. 2.
Remedies
Replace the unit.
Check the investigation item No. 2.
Remedies
An A/D converter error has occurred.
Check the alarm No. "6E" items.
Check items of each alarm No.
Check the investigation item No. 2.
Check the investigation item No. 2.
Check the alarm No. "68" items.
Check the investigation item No. 3.
Check the alarm No. "68" items.
Check the investigation item No. 3.
Correctly set the rotary switch.
Replace the unit.
CV
CV
CV
CV