18-17
Chapter 18
Tips/FAQ/Troubleshooting
E020 Temperature error
Cooling fan rotation speed
reduction error
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.
E021 Temperature error
When the temperature of inverter gets high, the
inverter turns OFF its output.
• The temperature
detector circuit broke
down.
Error occurred
during stop.
• The temperature detector circuit is broken down if the error is
generated consecutively even after a reset. A repair is required.
Error occurred
during operation.
• There is clogging in the
fin.
• The cooling ability is deteriorated. Cleaning the fin may improve the
situation.
• Enhancing the use environment or cooling environment may
improve the situation.
•
Used in high temperature
environment.
•
Cooling of the surroundings
is insufficient.
• The formal installation
condition is not satisfied.
• Improper installation of the inverter may results in the inverter
failure. Install the inverter properly in accordance with the instruction
manual.
• Carrier frequency is
high.
• The higher the carrier frequency is, the more the temperature inside
the inverter tends to increase. Lower the carrier frequency setting.
E020
Occurrence
Estimated cause(s)
Exemplar measures to be taken
The cooling fan is
working.
• Cooling fan is
approaching the end of
its life.
• The cooling ability has been deteriorated. The cooling fan needs to
be replaced.
Cooling fan
stopped.
• It is the end of cooling
fan life.
• The cooling fan needs to be replaced.
• A foreign object is stuck.
• If there is a foreign object stuck in the fan, the inverter may recover
by removing it.
Occurrence
Estimated cause(s)
Exemplar measures to be taken
E021
Summary of Contents for SJ Series
Page 39: ...5 4 Chapter 5 Included Items Memo ...
Page 55: ...6 16 Chapter 6 Installation Memo ...
Page 91: ...7 36 Chapter 7 Wire Connection and Optional Devices Memo ...
Page 135: ...9 40 Chapter 9 Operating Instructions Memo ...
Page 145: ...10 10 Chapter 10 Test Run Memo ...
Page 159: ...12 2 6 Chapter 12 Inverter Functions Memo ...
Page 169: ...12 3 10 Chapter 12 Inverter Functions Memo ...
Page 195: ...12 5 8 Chapter 12 Inverter Functions Memo ...
Page 217: ...12 8 12 Chapter 12 Inverter Function Memo ...
Page 287: ...12 10 32 Chapter 12 Inverter Functions Memo ...
Page 303: ...12 11 16 Chapter 12 Inverter Functions Memo ...
Page 349: ...12 15 8 Chapter 12 Inverter Function Memo ...
Page 395: ...12 17 34 Chapter 12 Inverter Functions Memo ...
Page 397: ...12 18 2 Chapter 12 Inverter Functions Memo ...
Page 415: ...12 19 18 Chapter 12 Inverter Function Memo ...
Page 581: ...15 10 Chapter 15 Optional Cassettes Memo ...
Page 591: ...16 10 Chapter 16 ProDriveNext EzSQ Memo ...
Page 642: ...18 49 Chapter 18 Tips FAQ Troubleshooting Memo ...
Page 650: ...19 8 Chapter 19 Maintenance and Inspection Memo ...
Page 781: ...Appendix 1 70 Appendix 1 List of Parameters Memo ...