Learning Protection Features
6.3.1 Fan Fault Detection
Cooling fan fault selection
Fan Fault Detection Setting Details
Set the cooling fan fault mode.
The inverter output is blocked and the fan trip is
displayed when a cooling fan error is detected.
When OU.33 (Q1 Define) and OU.31 (Relay1) are set
to 8 (FAN Warning), the fan error signal is output
and the operation continues.
OU.31 Relay1
When the code value is set to 8 (FAN Warning), the fan error signal is output and
operation continues. However, when the inverter inside temperature rises
above a certain level, output is blocked due to activation of overheat protection.
6.3.2 Lifetime diagnosis of components
Registering a capacitance reference for inspection
To perform a capacitor diagnosis, a capacitance reference must be measured and registered by setting
Pr-61 (CAP Diag) to 1 (Ref Diag) when the inverter is used for the first time. The measured reference
value is saved at Pr-63 and is used asthe reference for the capacitor life diagnosis.
Refer to the following instructions to measure a reference capacitance.
1 Set an appropriate capacitor diagnosis current based on the inverter’s rated output at Pr-60
(CAP DiagCurr).
• The capacitor diagnosis current is a direct current that is applied to the capacitor for
inspection, and is defined asin a percentage of the rated inverter output. Because the value
is defined based on the inverter output, set an appropriate value if the motor has smaller
rated current.
2 At Pr-62 (CAP Exchange Level), set the capacitor replacement warning level to a value
between 50.0% and 95.0%