L100 Inverter

6–3

Troubleshooting Tips

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

Symptom/condition

Probable Cause

 

 

 

 

Solution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the frequency command source

Make sure the parameter

 

 

A01 parameter setting correct?

setting A01 is correct.

 

 

Is the Run command source A02

Make sure the parameter

 

 

parameter setting correct?

setting A02 is correct.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is power being supplied to termi-

Check terminals L1, L2, and

 

 

nals L1, L2, and L3(N)? If so, the

L3(N), then U/T1, V/T2,

 

 

POWER lamp should be on.

and W/T3.

 

 

 

 

 

 

 

 

 

Turn on the power supply or

 

 

 

check fuses.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there an error code EXX

Press the Func. key and

 

The inverter

displayed?

determine the error type.

 

 

Then clear the error (Reset).

 

outputs U, V, W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

are not supply-

Are the signals to the intelligent

Verify the terminal functions

 

ing voltage.

input terminals correct?

for C01 - C05 are correct.

 

 

Is the Run Command active?

Turn on Run Command.

 

 

Is the [FW] terminal (or [RV])

Supply 24V to [FW] or [RV]

The motor

 

connected to P24 (via switch, etc.)

terminal, if configured.

will not run.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Has the frequency setting for F01

Set the parameter for F01 to

 

 

 

 

been set greater than zero?

a 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,

 

 

ometer?

verify voltage at “O” > 0V.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the RS (reset) function or FRS

Turn off the command(s).

 

 

(free-run stop) function on?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inverter outputs

Is the motor load too heavy?

Reduce load, and test the

 

U, V, W are

 

motor independently.

 

 

supplying

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voltage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The optional

Are the operational settings

Check switches 1 and 2 on

 

remote operator

between the remote operator and

the optional remote operator

 

is used (DR/W)

the inverter unit correct?

(copy unit).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

1

2

 

 

3

4

 

 

1: Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2: On

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Are the connections of output

Make connections according

 

 

terminals U/T1, V/T2, and W/T3

to the phase sequence of the

 

 

correct?

motor. In general:

 

 

 

Is the phase sequence of the motor

FWD = U-V-W, and

 

The direction of the motor is

forward or reverse with respect to

REV=U-W-V.

 

reversed.

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Are the control terminals [FW] and

Use terminal [FW] for

 

 

[RV] wired correctly?

forward, and [RV] is reverse.

 

 

Is parameter F04 properly set?

Set motor direction in F04.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Troubleshooting and Maintenance

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Hitachi L100 instruction manual Troubleshooting Tips, Symptom/condition Probable Cause Solution, Rev=U-W-V

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