Hitachi WJ200-001S Instruction Manual page 312

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