Unit installation

72 ACZ / AGZ-BM IOMM ACZ/AGZ-3
Troubleshooting Tips
The table below lists typical symptoms and the corresponding solution(s).
Symptom Condition Probable Cause Solution
• Is the frequency command source A_01 parameter
setting correct?
• Is the Run command source A-02 parameter setting
correct?
• Make sure the parameter setting A-01 is correct.
• Make sure the parameter setting A-02 is correct.
• Is power being supplied to terminals [L1], [L2], and
[L3/N]? If so, the POWER lamp should be ON.
• Check terminals [L1], [L2], and [L3/N], then [U/T1],
[V/T2], and [W/T3].
• Turn ON the power supply or check fuses.
• Is there an error code E X X displayed? • Press the Func. key and determine 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 C_01 – C_05 are
correct.
• Turn ON Run Command enable.
• Supply 24V to {FW] or [RV] terminal, if configured.
• Has the frequency setting for F_01 been set greater
than zero?
• Are the control circuit terminals [H], [O], and [L]
connected to the potentiometer?
• Set the parameter for F_01 to a safe, non-zero
value.
• If the potentiometer is the frequency setting source,
verify voltage at [O] > 0V.
The inverter
outputs [U], [V],
[W] are not
supplying voltage.
• 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, and test the motor independently.
The motor
will not run.
The optional
remote operator is
used (SRW).
• Are the operational settings between the remote
operator and the inverter unit correct?
• Check the operator type setting.
• Are the connections of output terminals [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.
The direction of the motor is
reversed.
• Are the control terminals [FW] and [RW] wired
correctly?
• Is parameter F_04 properly set?
• Use terminal [FW] for forward, and [RV] for reverse.
• Set motor direction in F_04.
• If using the analog input, is the current or voltage at
[O] or [OI]?
• Reduce the load.
• Heavy loads activate the overload restriction feature
(reduces output as needed).
• Is the load too heavy? • Reduce the load
• Heavy loads activate the overload restriction feature
(reduces output as needed).
The motor speed will not reach
the target frequency (desired
speed).
• Is the inverter internally limiting the output frequency? • Check max frequency setting (A_04).
• Check frequency upper limit setting (A_61).
The RPM of the motor does not
match the inverter output
frequency setting.
• Is the maximum frequency setting A_04 correct?
• Does the monitor function D_01 display the expected
output frequency?
• Verify the V/f settings match motor specification.
• Make sure all scaling (such as A_11 to A_14) is
properly set.
• Was power turned OFF after a parameter edit but
before pressing the Store key?
• Edit the data and press the Store key once.
No downloads
have occurred.
• Edits to data are permanently stores at power down.
Was the time from power OFF to power ON less than
six seconds?
• Wait six seconds or more before turning power OFF
after editing data.
Inverter data
is not correct.
A download to
the inverter was
attempted.
• Was the power turned OFF within six seconds after
the display changed from REMT to INV?
• Copy data to the inverter again, and keep power ON
for six seconds or more after copying.
True for certain
parameters.
• Is the inverter in Run Mode? Some parameters
cannot be edited during Run Mode.
• Put inverter in Stop Mode (press the Stop/reset
key). Then edit the parameter.
A parameter
will not
change after
an edit
(reverts to old
setting).
True for all
parameters.
• If you’re using the [SFT] intelligent input (software lock
function)is the [SFT] input ON?
• Change the state of the SFT input, and check the
B_31 parameter (SFT mode).