6–3

SJ300 Inverter

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

Tips
Symptom/conditionProbable CauseSolution

 

 

 

 

 

 

 

 

 

 

 

 

 

• Is the frequency command source

• Make sure the parameter

 

 

 

A001 parameter setting correct?

setting A001 is correct.

 

 

 

• Is the Run command source A002

• Make sure the parameter

 

 

 

parameter setting correct?

setting A002 is correct.

 

 

 

 

 

 

 

 

• Is power being supplied to terminals

• Check terminals [R], [S], and

 

 

 

[R], [S], and [T] ([L1], [L2], and

[T] ([L1], [L2], and [L3]), then

 

 

 

[L3])? If so, the POWER lamp should

[U], [V], and [W] ([T1], [T2],

 

 

 

be ON.

and [T3]).

 

 

 

 

• Turn ON the power supply or

 

 

 

 

check fuses.

 

 

 

 

 

 

 

 

• Is there an error code EXX.X displayed?

• Press the FUNC. key and deter-

 

 

The inverter

 

mine the error type. Eliminate

 

 

 

the error cause, then clear the

 

 

outputs U, V, W

 

error (Reset).

 

 

are not supplying

 

 

The motor

 

• Are the signals to the intelligent input

• Verify the terminal functions

 

voltage.

will not run.

 

terminals correct?

for C001 - C008 are correct.

 

 

 

• Is the Run Command active?

• Turn ON Run command

 

 

 

 

enable.

 

 

 

• Is the [FW] terminal (or [RV])

• Supply 24V to [FW] or [RV]

 

 

 

connected to P24 (via switch, etc.)

terminal, if configured.

 

 

 

 

 

 

 

 

• Has the frequency setting for F001

• Set the parameter for F001 to a

 

 

 

been set greater than zero?

safe, non-zero value.

 

 

 

• Are the control circuit terminals [H],

• If the potentiometer is the

 

 

 

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

frequency setting source, verify

 

 

 

ometer?

voltage at [O] > 0V.

 

 

 

 

 

 

 

 

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

• Turn OFF the command(s).

 

 

 

run stop) function ON?

 

 

 

 

 

 

 

 

Inverter outputs

• Is the motor load too heavy?

• Reduce load or test the motor

 

 

U, V, W are

 

independently of the load.

 

 

supplying voltage.

 

 

 

 

 

 

 

 

 

 

• Are the connections of output termi-

• Make connections according to

 

 

 

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

the phase sequence of the

 

 

 

correct?

motor. In general:

The direction of the motor is

• Is the phase sequence of the motor

FWD = U-V-W, and REV=U-

forward or reverse with respect to

W-V.

 

reversed.

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

 

 

 

 

 

 

 

 

 

 

 

 

 

• Are the control terminals [FW] and

• Use terminal [FW] for forward,

 

 

 

[RV] wired correctly?

and [RV] for reverse.

 

 

 

• Is parameter F004 properly set?

• Set motor direction in F004.

 

 

 

 

 

Troubleshooting Maintenance and