6−7
18. If cable to operator is disconnected, inveter will trip or stop.
Possible Cause(s) Corrective Action
Improper setting of b165. Set ex.operator com loss action (b165) to 02.
19. No response over Modbus communication.
Possible Cause(s) Corrective Action
New parameter is not updated. If C071, C074 or C075 is changed, cycle power or reset
inverter by turning RS terminal ON and OFF.
Incorrect setting of RUN command
source (A002/A202).
Set RUN command source (A002/A202) to 03.
Incorrect setting of Frequency source
(A001/A201).
Set frequency source (A001/A201) to 03.
Incorrect setting of com. speed. Check communication speed (A071).
Incorrect setting or duplication of
Modbus address.
Check Modbus address (A072).
Incorrect setting of com. parity. Check communication parity (A074).
Incorrect setting of com. stop bit. Check communication stop bit (A075).
Incorrect wiring. Check communication wiring at SP,SN terminals.
20. When inverter starts, ECB (Earth leakage Circuit Breaker) trips.
Possible Cause(s) Corrective Action
Leak current of inverter is excessive. Reduce carrier frequency (A083).
Increase current sensor level of ECB or replace ECB with
another one having higher current sensor level.
21.DC braking doesn’t work
Possible Cause(s) Corrective Action
DC braking force for deceleration (A054)
isn’t set. (Defaults (0.))
Set DC braking force for deceleration (A054).
DC braking time for deceleration (A055)
isn’t set. (Defaults (0.0))
Set DC braking time for deceleration (A055).
22.Under-voltage error
Possible Cause(s) Corrective Action
Decrease in input voltage due to capacity
shortage of electric source.
Make capacity of electric source larger.
23.TV or radio near inverter receives noises
Possible Cause(s) Corrective Action
The radiation noise generated by the
inverter.
Put away those devices from the inverter as far as possible.
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