TROUBLESHOOTING
SERVICE MANUAL – QL Servo S3-T
MITSUBISHI ALARMS CAUSE AND SOLUTIONS
Display
Error name
Definition
Cause
Action
AL.10
Undervoltage
Power supply
voltage dropped.
MR J2S-CP:160V
or less
MR J2S-CP1:83V
or less
1. Power supply voltage is low
Review the power supply
2. There was an instantaneous
control power failure of 60 ms or
longer
3. Shortage of power supply
capacity caused the power
supply voltage to drop at start,
etc.
4. Faulty parts in the amplifier
Replace the amplifier
AL.12
Memory error 1
RAM, memory fault
Faulty parts in the amplifier
Replace the amplifier
AL.13
Clock error
Printed board fault
Faulty parts in the amplifier
Replace the amplifier r
AL.15
Memory error 2
EEP-ROM fault
Faulty parts in the amplifier
Replace the amplifier
AL.16
Encoder error 1
Communication
error occurred
between encoder
and servo amplifier
1. Encode connector (CN2)
disconnected
Connect correctly
2. Encoder fault
Replace the servo motor
3. Encoder cable faulty
Replace the cable
AL.17
Board error
CPU/parts fault
Faulty parts in the amplifier
Replace the amplifier
AL.19
Memory error 3
ROM memory error Faulty parts in the amplifier
Replace the amplifier
AL.1A
Motor
combination
error
Combination error
between the motor
and the amplifier
Combination error between the
motor and the amplifier
Use a correct
combination
AL.20
Encoder error 2
Communication
error between the
motor and the
amplifier
1. Encode connector (CN2)
disconnected
Connect correctly
2. Encoder error
Replace the servo motor
3. Encoder cable faulty
Replace the cable
AL.24
Main circuit
error
Ground fault
occurred at the
servo
motor outputs (U,V
and W phases) of
the
servo amplifier.
1. Power input wires and servo
motor output wires are in contact
at main circuit terminal block
(TE1).
Connect correctly
2. Sheathes of servo motor
power cables deteriorated,
resulting in ground fault.
Replace the cable
3. Main circuit of servo amplifier
failed.
Checking method
AL.24 occurs if the servo is
switched on after disconnecting
the U, V, W power cables from
the servo amplifier.
Replace the amplifier
AL.25
Absolute
position erase
Absolute position
data in error
1. Reduced voltage of super
capacitor in encoder
After leaving the alarm
occurring for a few
minutes, switch power
off, then on again.
Always make home
position setting again.
2. Battery voltage low
Change battery.
Always make home
position setting again.
3. Battery cable or battery is
faulty.
Summary of Contents for QUICK LOAD SERVO S3 T BARFEED
Page 2: ...GENERAL SERVICE MANUAL QL Servo S3 T ...
Page 6: ...GENERAL SERVICE MANUAL QL Servo S3 T ...
Page 42: ...MECHANICAL EQUIPMENT SERVICE MANUAL QL Servo S3 T ...
Page 46: ...PNEUMATIC EQUIPMENT SERVICE MANUAL QL Servo S3 T ...
Page 64: ...ELECTRICAL EQUIPMENT SERVICE MANUAL QL Servo S3 T ...
Page 96: ...TECHNICAL CHARACTERISTICS SERVICE MANUAL QL Servo S3 T ...
Page 98: ...DISPOSAL SERVICE MANUAL QL Servo S3 T ...
Page 103: ...TROUBLESHOOTING SERVICE MANUAL QL Servo S3 T SEQUENCE DIAGRAM ...
Page 104: ...TROUBLESHOOTING SERVICE MANUAL QL Servo S3 T SEQUENCE LISTING ...
Page 105: ...TROUBLESHOOTING SERVICE MANUAL QL Servo S3 T ...
Page 122: ...APPENDICES 121 SERVICE MANUAL QL Servo S3 T WIRING DIAGRAM 021 40 620F CE MRJ 4 ...
Page 123: ...122 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 124: ...APPENDICES 123 SERVICE MANUAL QL Servo S3 T ...
Page 125: ...124 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 126: ...APPENDICES 125 SERVICE MANUAL QL Servo S3 T ...
Page 127: ...126 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 128: ...APPENDICES 127 SERVICE MANUAL QL Servo S3 T ...
Page 129: ...128 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 130: ...APPENDICES 129 SERVICE MANUAL QL Servo S3 T ...
Page 131: ...130 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 132: ...APPENDICES 131 SERVICE MANUAL QL Servo S3 T WIRING DIAGRAM 021 40 650F CE DCS MRJ4 ...
Page 133: ...132 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 134: ...APPENDICES 133 SERVICE MANUAL QL Servo S3 T ...
Page 135: ...134 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 136: ...APPENDICES 135 SERVICE MANUAL QL Servo S3 T ...
Page 137: ...136 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 138: ...APPENDICES 137 SERVICE MANUAL QL Servo S3 T ...
Page 139: ...138 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 140: ...APPENDICES 139 SERVICE MANUAL QL Servo S3 T ...
Page 141: ...140 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 142: ...APPENDICES 141 SERVICE MANUAL QL Servo S3 T ...
Page 143: ...142 APPENDICES SERVICE MANUAL QL Servo S3 T WIRING DIAGRAM 021 40 622C CE MRJ4 QLSIII MI ...
Page 144: ...APPENDICES 143 SERVICE MANUAL QL Servo S3 T ...
Page 145: ...144 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 146: ...APPENDICES 145 SERVICE MANUAL QL Servo S3 T ...
Page 147: ...146 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 148: ...APPENDICES 147 SERVICE MANUAL QL Servo S3 T ...
Page 149: ...148 APPENDICES SERVICE MANUAL QL Servo S3 T ...
Page 150: ...APPENDICES 149 SERVICE MANUAL QL Servo S3 T ...
Page 151: ...150 APPENDICES SERVICE MANUAL QL Servo S3 T PNEUMATIC DIAGRAM ...