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12
TROUBLESHOOTING
12.3 Error Code List  
12.3.3  Error code list (1000 to 1999)
12
 - 24
9
EM
C AN
D
 L
O
V
O
LT
AG
DI
RE
C
T
IV
E
S
10
LO
A
D
ING A
ND 
INS
TA
LLA
T
ION
11
M
A
INT
E
NANCE
 AND 
IN
SP
ECT
IO
N
12
T
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G
 A
PPE
NDICES
 INDEX
 
 
Error
Code
(SD0)
Error Contents and Cause
Corrective Action
Corresponding
CPU
1000
Runaway or failure of the main CPU
• Malfunctioning due to noise or other 
reason
• Hardware fault
• Take noise reduction measures.
• Reset the CPU module and RUN it 
again.If the same error is displayed 
again, this suggests a CPU module 
hardware fault.(Please consult your 
local Mitsubishi representative.)
QS
1001
1002
1003
1004
1006
1009
• The power supply module detected 
an incorrect power waveform.
• A failure is detected on the power 
supply module, CPU module, or base 
unit.
• Correct the power waveform applied 
to the power supply module.
• Reset the CPU module and RUN it 
again.If the same error is detected 
again, it is considered that the power 
supply module, CPU module, or base 
unit is failure. (Please consult your 
local Mitsubishi representative.)
1010
Entire program was executed without 
the execution of an END instruction.
• When the END instruction is 
executed it is read as another 
instruction code, e.g. due to noise.
• The END instruction has been 
changed to another instruction code 
somehow.
• Take noise reduction measures.
• Reset the CPU module and RUN it 
again. If the same error is displayed 
again, this suggests a CPU module 
hardware fault. (Please consult your 
local Mitsubishi representative.)
QS
1030
Run mode suspended or failure of main 
CPU
• Malfunctioning due to noise or other 
reason
• Hardware fault
• Take noise reduction measures.
• Reset the CPU module and RUN it 
again. If the same error is displayed 
again, this suggests a CPU module 
hardware fault. (Please consult your 
local Mitsubishi representative.)
QS
1031