Mitsubishi QJ71LP21 Reference Manual page 271

8 TROUBLESHOOTING
Error
Code Error Contents and Cause
*1
(SD0)
• A momentary power supply
1500 interruption has occurred.
• The power supply went off.
The power supply voltage (100 to
240VAC) of either of the two power
supply modules on the power supply
duplexing extension base unit dropped
to or below 85% of the rated voltage.
1510
The voltage of one power supply
module dropped on the redundant
base unit.
The voltage(100 to 240VAC) of the
power supply module on the extension
base unit dropped to or below 85% of
the rated voltage.
1520
A fault of one redundant power supply
module was detected in the redundant
power supply system.
The 24 VDC power supplied to the
system management module AS92R
1530
has dropped below 90% of the rated
voltage.
• The battery voltage in the CPU
module has dropped below
1600 stipulated level.
• The lead connector of the CPU
module battery is not connected.
Voltage of the battery on memory card
1601
1 has dropped below stipulated level.
Voltage of the battery on memory card
1602
2 has dropped below stipulated level.
*1 Characters in parentheses ( ) indicate the special register numbers where individual information is being
:
stored.
*18 Serial No.(with the first 5 digits : 07032 or later) is applicable.
:
8 - 60
Corrective Action
Check the power supply.
Check the supply voltage of the power
supply module. If the voltage is
abnormal then replace the power
supply module.
Check the power supplied to the
redundant power supply modules
mounted on the redundant base unit.
Check the supply voltage of the power
supply module. If the voltage is
abnormal then replace the power
supply module.
Hardware fault of the redundant power
supply module. (Contact your local
Mitsubishi representative, explaining a
detailed description of the problem.)
Check the 24VDC power supplied to
the system management module
AS92R.
• Change the battery.
• If the battery is for program memory,
standard RAM or for the back-up
power function, install a lead
connector.
Change the battery.
Change the battery.
MELSEC-Q
Corresponding
CPU
Rem
Q4AR
*18
Qn(H)
*18
QnPH
QnPRH
Rem
Q4AR
*18
Qn(H)
*18
QnPH
QnPRH
Rem
Q4AR
QnA
Qn(H)
QnPH
QnPRH
QnA
8 - 60