49
Fault Contact
output
Error causes Action to be taken
Non Operation
Input voltage drop
Check the main circuit DC voltage in Un-xx. If the voltage is
low, adjust the input voltage.
Non Operation
Input voltage rise
Check the main circuit DC voltage in Un-xx. If the voltage is
high, adjust the input voltage.
Non Operation
Overload
Cooling fan fault
Ambient temperature rise
Clogged filter
Replace the cooling fan and clean the filter.
Ambient temperature:
104℉ (40℃) or less for enclosed type
122℉ (45℃) or less for open chassis
Non Operation
Motor current exceeded the set value because of machine
fault or overload.
Check the driven machine and correct the cause of the fault or
set to a higher value.
Non Operation
Insufficient power for accel/decel
Overload
Phase loss
Set proper accel/decel time for smooth operation.
For stall prevention during normal operation lighten the
load or increase inverter capacity.
Non Operation
Operation sequence error
3-wire/2-wire selection error
Recheck the control sequence.
Recheck system constant (Sn-15 to -18)
Non Operation
External fault conditions set-up
Take appropriate measurement for the cause of external fault
input.
Non Operation
Transmission between the inverter and digital operator
cannot be established 5 seconds after supplying power.
Insert the operator connector again.
Check the wiring of control circuit.
Replace the control board or operator.
Transmission between the inverter and digital operator is
established once after supplying power, but later
transmission fault continued for more than 2 seconds.
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