Omron RX2 Series User Manual page 768

12 Troubleshooting
E020 Temperature Error from Cooling Fan Rotation Speed Reduc-
tion
If the temperature of inverter gets high due to deterioration of cooling ability resulted from decrease in
fan rotation speed, the inverter turns OFF its output. Refer to E021 also.
Occurrence
Cooling fan stopped.
The cooling fan is
working.
E021 Temperature Error
When the temperature of inverter gets high, the inverter turns OFF its output.
Occurrence
Error occurred
during operation.
Error occurred
during stop.
E024 Input Open-phase Error
When [bb-65] input phase loss selection is set to 01, when a missing phase is detected in input line, the
inverter turns OFF its output.
Occurrence
Error occurred after
power was turned
ON.
Error occurred after
long hours of use.
12 - 14
Estimated cause(s)
If there is a foreign object stuck in the fan, the inverter may
A foreign object is stuck.
recover by removing it.
It is the end of cooling
The cooling fan needs to be replaced.
fan life.
Cooling fan is approach- The cooling ability has been deteriorated. The cooling fan
ing the end of its life. needs to be replaced.
Estimated cause(s)
The higher the carrier frequency is, the more the temperature
Carrier frequency is high. inside the inverter tends to increase. Lower the carrier fre-
quency setting.
There is clogging in the The cooling ability is deteriorated. Cleaning the fin may
fin. improve the situation.
• Used in high tempera-
ture environment.
Enhancing the use environment or cooling environment may
• Cooling of the
improve the situation.
surroundings is insuffi-
cient.
Improper installation of the inverter may results in the inverter
The formal installation
failure. Install the inverter properly in accordance with the
condition is not satisfied.
instruction manual.
The temperature detector circuit is broken down if the error is
The temperature detec-
generated consecutively even after a reset. A repair is
tor circuit broke down.
required.
Estimated cause(s)
You need to turn OFF the power supply and check the input
An input line or the motor
lines and the wiring condition of breaker. This error may also
has a loose connection
occur due to PS voltage defect, contact defect, screw tighten-
or is disconnected.
ing failure, etc.
Single-phase input is
For input lines, use three-phase connection.
used.
An input line or breaker
The situation may be improved by mending loose connections
has a loose connection
due to loosening of screws or the breaker problems.
or is disconnected.
High-function General-purpose Inverter RX2 Series User's Manual
Exemplar measures to be taken
Exemplar measures to be taken
Exemplar measures to be taken