Hitachi SJ300-037HFE 사용자 설명서

SJ300 Inverter

T

roub

leshooting

and Maintenance

The table below lists typical symptoms and the corresponding solution(s). 

The motor 

will not run.

The inverter 

outputs U, V, W 

are not supplying 

voltage.

• Is the frequency command source 

A001 parameter setting correct?

• Is the Run command source A002 

parameter setting correct?

• Make sure the parameter 

setting A001 is correct.

• Make sure the parameter 

setting A002 is correct.

• Is power being supplied to terminals

 [R], [S], and [T] ([L1], [L2], and 
[L3])? If so, the POWER lamp should 
be ON.

• Check terminals [R], [S], and 

[T] ([L1], [L2], and [L3]), then 
[U], [V], and [W] ([T1], [T2], 
and [T3]).

• Turn ON the power supply or 

check fuses.

• Is there an error code 

EXX.X

 

displayed?

• Press the Func. key and deter-

mine the error type. Eliminate 
the error cause, then clear the 
error (Reset).

• Are the signals to the intelligent input 

terminals correct?

• Is the Run Command active?

• Is the [FW] terminal (or [RV]) 

connected to P24 (via switch, etc.)

• Verify the terminal functions 

for C001 - C008 are correct.

• Turn ON Run command 

enable.

• Supply 24V to [FW] or [RV] 

terminal, if configured.

• Has the frequency setting for F001 

been set greater than zero?

• Are the control circuit terminals [H], 

[O], and [L] connected to the potenti-
ometer?

• Set the parameter for F001 to a 

safe, non-zero value.

• If the potentiometer is the 

frequency setting source, verify 
voltage at [O] > 0V.

• Is the RS (reset) function or FRS (free-

run stop) function ON?

• Turn OFF the command(s).

Inverter outputs 
U, V, W are 
supplying voltage.

• Is the motor load too heavy?

• Reduce load or test the motor 

independently of the load.

The direction of the motor is 

reversed.

• Are the connections of output termi-

nals [U/T1], [V/T2], and [W/T3] 
correct?

• Is the phase sequence of the motor 

forward or reverse with respect to
[U/T1],[V/T2], and [W/T3]?

• Make connections according to 

the phase sequence of the 
motor. In general:
FWD = U-V-W, and REV=U-
W-V.

• Are the control terminals [FW] and 

[RV] wired correctly?

• Is parameter F004 properly set?

• Use terminal [FW] for forward, 

and [RV] for reverse.

• Set motor direction in F004.