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12 Troubleshooting
High-function General-purpose Inverter RX2 Series User’s Manual
12-2 Error No. and Its Measure
12
12-2-2 Details about Errors
A decrease of the main power supply of inverter results in a circuit breakage. To prevent this, the
inverter turns OFF its output. When P-N voltage falls below approx. 160Vdc (200V class) or approx.
320VDC (400V class), the output is turned OFF. By setting the parameter, you can perform retries for a
fixed number of times without generating an error. Furthermore, undervoltage error during stop can be
disabled by setting.
If the built-in current detector has problems, the inverter turns OFF its output.
When a malfunction or problem occurs in the built-in CPU, the inverter turns OFF its output and then
displays the error.
If the inverter doesn’t recover by re-turning ON the power, the CPU is likely to be broken.
E009 Undervoltage Error
Occurrence Estimated cause(s) Exemplar measures to be taken
There was a power
failure.
PS voltage decreased.
If the internal power supply hasn’t been fully turned OFF, it is
possible to re-start the inverter after the power supply is recov-
ered, by setting the retry function while it is still on.
Error occurred with
the start of opera-
tion.
• PS voltage decreased.
• PS capacity is insuffi-
cient.
When power supply voltage decreases or power supply
capacity is insufficient, re-examination of power supply envi-
ronment is required.
The inverter doesn’t
start.
PS voltage is insufficient.
Perform power supplying in accordance with the inverter volt-
age class.
Error occurred after
long hours of use.
• System environment
changes
• Capacitor deterioration
• Circuit failure
If an undervoltage occurs frequently, the inverter may have
reached its end of life or be broken down. A repair is required.
E010 Current Detector Error
Occurrence Estimated cause(s) Exemplar measures to be taken
Error occurred after
power was turned
ON.
Current detector circuit is
broken.
If the error recurs after a reset operation, the current detector
circuit may be broken down. A repair is required.
A noise source is nearby.
When there is a noise source nearby, the situation may be
improved by taking a noise countermeasure such as keeping
the noise source away or placing a shielding plate.
Error occurred after
long hours of use.
Current detector circuit is
broken.
If the error recurs after a reset operation, the current detector
circuit may be broken down. A repair is required.
E011 CPU Error
Occurrence Estimated cause(s) Exemplar measures to be taken
Error occurred
abruptly.
The internal CPU is bro-
ken.
• The inverter may recover by a reset operation, re-turning
ON the power, or initialization operation. When the inverter
recovered, an initialization must be executed.
• If the inverter doesn’t recover, the CPU may be broken
down. A repair is required.
A noise source is nearby.
Where there is a noise source nearby, the situation may be
improved by taking a noise countermeasure such as keeping
the noise source away or placing a shielding plate.
Error occurred
during data writing.
Data is inconsistent.
The inverter may recover by a reset operation, re-turning ON
the power, or initialization operation. When the inverter recov-
ered, an initialization must be executed. See 6-1-2 Inverter Ini-
tialization on page 6-5.
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