User`s manual

Troubleshooting Error code list
11 – 36
1500
AC DOWN
A momentary power supply interruption has
occurred.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
Always
Check the power supply.
ON OFF Continue )
1510
SINGLE PS. DOWN
Die Versorgungsspannung eines redundanten
Netzteils auf einem redundanten Baugruppenträ-
ger ist eingebrochen.
 Collateral information

Common Information: Base No. / Nr. des
Netzteils
 Individual Information: —
 Diagnostic Timing
Always
Check the power supplied to the redundant
power supply modules mounted on the redun-
dant base unit.
ON ON Continue Qn(H) (first 5
digits of serial
No. is 04101 or
later)
QnPH (first 5
digits of serial
No. is 04101 or
later)
QnPRH
QnU (except
Q00UJ-, Q00U-
and Q01UCPU)
1520
SINGLE PS. ERROR
Ein redundantes Netzteils auf einem redundanten
Baugruppenträger ist defekt.
 Collateral information

Common Information: Base No. / Nr. des
Netzteils
 Individual Information: —
 Diagnostic Timing
Always
Hardware fault of the redundant power supply
module.
Contact your local Mitsubishi representative.
1600
BATTERY ERROR
– The battery voltage in the CPU module has
dropped below stipulated level.
– The lead connector of the CPU module battery
is not connected.
 Collateral information

Common Information: Drive Name
 Individual Information: —
 Diagnostic Timing
Always
– Change the battery.
– If the battery is for program memory, stand-
ard RAM or for the back-up power function,
install a lead connector.
– Check the lead connector of the CPU module
for looseness. Firmly engage the connector if
it is loose.
NOTE:
When this error occurs, the BAT. LED of the CPU
module is lit too.
ON OFF Continue )
1601
BATTERY ERROR
Voltage of the battery on memory card has drop-
ped below stipulated level.
 Collateral information

Common Information: Drive Name
 Individual Information: —
 Diagnostic Timing
Always
Change the battery.
NOTE:
When this error occurs, the BAT. LED of the CPU
module is lit too.
1610
FLASH ROM ERROR]
The number of writing to flash ROM (standard
ROM and system securement area) exceeds
100,000 times.
(Number of writings = 100,000 times max.)
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
When writing to ROM
Change the CPU module.
ON ON Continue QnU
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
Tab. 11-3: Error code list (1000 to 1999) for PLC CPUs of MELSEC System Q