Chapter 4 – Start-up Procedure
ACS 501 Installation & Start-up Manual 4-5
Keypad Control Tests
Motor Disconnected
from the ACS 501
After setting the Start-up Data parameters, test the drive as follows:
1. Disconnect and lock out power from the ACS 501, wait at least five
minutes after disconnecting power. Verify that the DC Bus voltage is at a
safe level by measuring the voltage between positive (+) and negative (-)
on Terminal Block X2, labeled “Brake.” Check for zero volts at
Terminals X50:21 – 29 before continuing.
Note: If the internal brake option is installed, measure between the input
terminal block X1 and positive (+) on terminal block X2. Meter must be
rated for 1000 VDC.
2. Disconnect the motor from the ACS 501.
3. Power up the ACS 501.
4. Press [Start/Stop] to issue a start command. The Run Status indicator on
the LCD Display displays the symbol “|”.
5. Press [ * ] to enter setting mode. Press [Up Arrow] until frequency
display shows 60 Hz, then press [ * ] to enter value.
6. Press [Up Arrow] or [Down Arrow] to scroll through and check the
Operating Data parameters. Check that Operating Data Parameter 7
(Output Voltage) is equal to the input voltage.
If the drive operates according to these steps, disconnect and lock out power
to the ACS 501 to prepare for the next test.
WARNING! Wait at least five minutes after disconnecting power from the
drive before you attempt to service the drive. Bus capacitors in the
intermediate DC circuit must discharge before servicing the drive. Check for
zero volts at Terminals X50:21 – 29 and X2:(+) and (-), or between the input
Terminal Block X1 and Terminal Block X2:(+) if an internal brake option is
installed. Meter must be rated for 1000 VDC. Failure to check voltages may
result in death or serious injury.
If the drive does not operate according to these steps, refer to Chapter 5 –
Fault Tracing.
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