Troubleshooting; Servo Amplifier; Alarm Codes; Alarm Corrective Actions - Mitsubishi Electric Melservo-H Series Specifications And Instruction Manual

6. TROUBLESHOOTING

6. TROUBLESHOOTING

6.1 Servo amplifier

6.1.1 Alarm codes

(Note)
Indication Alarm Code
ZSP
AL.1b 0
Note. 0: Corresponding terminal-SG off (open)
1: Corresponding terminal-SG on (short)

6.1.2 Alarm corrective actions

Indication Name
AL.10 Under Power supply
voltage voltage dropped.
160V or less
Al.1b Converter Servo on (SON)
RD off signal switched on
when the ready
signal (RD) of the
converter was off.
AL.33 Over Converter bus
voltage voltage exceeded
400V.
POINT
• This section provides the alarms which are different in definition from
those of the servo amplifiers of 22kW and less.
PF RD D003
1 0 0
Parameter Unit Screen Display
Current Alarm
Definition
(name and
definition)
Under volt
Converter RD
off
Over volt.
(Note)
MR-H-DO1 Alarm Code
D002 D001 D000
0 1
Alarm
Occurrence
Factor
Power Volt 1. Power supply voltage is low.
under 160V
15 ms IPF
Power Volt 2. Power failed instantaneously.
under 160V
Main circuit power supply: 10ms or less
15ms IPF
Control circuit power supply: 100ms or less
Insuf. Power 3. Shortage of power supply capacity
capacity caused the power supply voltage to
drop at start, etc.
4. Power switched on within 5s after it
had switched off.
5. Faulty parts in the servo amplifier
Alarm (AL.10) occurs if power is
switched on after all connectors
are disconnected.
Converter RD 1. Bus voltage is low.
off
2. Alarm occurred in the converter.
Reg. Resist. Has 1. Lead of regenerative brake option is
trouble open or disconnected.
Reg. Tr. 2. Regenerative brake transistor failed.
damaged
Reg. Resist has 3. Wire breakage of built-in
trouble regenerative brake resistor or
regenerative brake option
Power volt 4. Capacity of regenerative brake
exceeded option is insufficient.
5. Power supply voltage high.
6 - 1
Function Name
0 Converter RD off
Cause
Checking method
Parameter Unit
Screen Display
Converter RD off
Action
Review the
power supply.
Change the
Servo amplifier.
Remove the
cause of the
converter alarm
and deactivate
the alarm.
1. Change lead.
2. Connect
correctly.
Increase
regenerative
brake option
capacity.
Review the
power supply.