Hitachi SJ7002 Series Instruction Manual page 250

Sj7002 series
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Troubleshooting
Tips
Symptom/condition
The motor
will not run.
The direction of the motor is
reversed.
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The table below lists typical symptoms and the corresponding solution(s).
• Is the frequency command source
A001 parameter setting correct?
• Is the Run command source A002
parameter setting correct?
• Is power being supplied to terminals
[R], [S], and [T] ([L1], [L2], and
[L3])? If so, the POWER lamp should
be ON.
• Is there an error code
displayed?
The inverter
outputs U, V, W
are not supplying
• Are the signals to the intelligent input
voltage.
terminals correct?
• Is the Run Command active?
• Is the [FW] terminal (or [RV])
connected to P24 (via switch, etc.)
• 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?
• Is the RS (reset) function or FRS (free-
run stop) function ON?
Inverter outputs
• Is the motor load too heavy?
U, V, W are
supplying voltage.
• 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]?
• Are the control terminals [FW] and
[RV] wired correctly?
• Is parameter F004 properly set?
Probable Cause
E--.-
SJ700
Inverter
2
Solution
• Make sure the parameter setting
A001 is correct.
• Make sure the parameter setting
A002 is correct.
• 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.
• Press the FUNC. key and determine
the error type. Eliminate the error
cause, then clear the error (Reset).
• Verify the terminal functions for
C001 - C008 are correct.
• Turn ON Run command enable.
• Supply 24V to [FW] or [RV] termi-
nal, if configured.
• Set the parameter for F001 to a safe,
non-zero value.
• If the potentiometer is the frequency
setting source, verify voltage at
[O] > 0V.
• Turn OFF the command(s).
• Reduce load or test the motor
independently of the load.
• Make connections according to the
phase sequence of the motor. In
general:
FWD = U-V-W, and REV=U-W-V.
• Use terminal [FW] for forward, and
[RV] for reverse.
• Set motor direction in F004.
6–3

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Troubleshooting

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