Mitsubishi FR-F800-E - Causes and Corrective Actions; Precautions for Maintenance and Inspection

Causes and corrective actions
86
PROTECTIVE FUNCTIONS
4.4 Causes and corrective actions
Alarm
Fault
Operation panel
indication
FN2
Name
Internal-circulation fan alarm
Description
FN2 appears on the operation panel when the internal air circulation fan stops due to a fault or low rotation
speed.
Check point
Check the internal air circulation fan for a failure.
Corrective action
The fan may be faulty. Please contact your sales representative.
Operation panel
indication
Abnormal Intnl Temp
Name
Abnormal internal temperature
Description
The inverter trips when the inverter internal temperature reaches the specified value or higher.
Check point
• Check for too high surrounding air temperature.
• Check if the internal air circulation fan or the cooling fan stops due to a fault.
Corrective action
• Install an inverter suitable for the installation environment. (Refer to page 21.)
• Replace the internal air circulation fan or the cooling fan.