Causes and corrective actions
4.4
Causes and corrective actions
Alarm
Operation panel
indication
Name
Description
Check point
Corrective action
Fault
Operation panel
indication
Name
Description
Check point
Corrective action
78
PROTECTIVE FUNCTIONS
FN2
Internal-circulation fan alarm
FN2 appears on the operation panel when the internal air circulation fan stops due to a fault or low rotation
speed.
Check the internal air circulation fan for a failure.
The fan may be faulty. Please contact your sales representative.
Abnormal Intnl Temp
Abnormal internal temperature
The inverter trips when the inverter internal temperature reaches the specified value or higher.
• Check for too high surrounding air temperature.
• Check if the internal air circulation fan or the cooling fan stops due to a fault.
• Install an inverter suitable for the installation environment. (Refer to
• Replace the internal air circulation fan or the cooling fan.
page
18.)