SECTION 1
10
WARNING
Before opening the variable speed drive covers:
• Disconnect all power to the variable speed drive.
• Wait a minimum of 5 (five) minutes after all the
lights on the keypad are off. This allows time for
the DC bus capacitors to discharge.
• A hazard voltage may still remain in the DC bus
capacitors even if the power has been turned off.
Confirm that the capacitors have fully discharged
by measuring their voltage using a multimeter set
to measure DC voltage. Failure to follow the above
precautions may cause death or severe injury.
CAUTION
Do not perform any meggar or voltage withstand
tests on any part of the variable speed drive or its
components. Improper testing may result in
damage. Prior to any tests or measurements of
the motor or the motor cable, disconnect the
motor cable at the variable speed drive output
terminals (U, VW) to avoid damaging the variable
speed drive during motor or cable testing.
CAUTION
Do not touch any components on the circuit
boards. Static voltage discharge may damage
the components.
CAUTION
Install the variable speed drive in a well venti-
lated room that is not subject to temperature
extremes, high humidity, or condensation, and
avoid locations that are directly exposed to
sunlight, or have high concentrations of dust,
corrosive gas, explosive gas, inflammable gas,
grinding fluid mist, etc. Improper installation
may result in a fire hazard.
CAUTION
Make sure that no power correction capacitors
are connected to the variable speed drive out-
put or the motor terminals to prevent variable
speed drive malfunction and potential damage.
CAUTION
Make sure that the variable speed drive output
terminals (U, V, W) are not connected to the
utility line power as severe damage to the VSD
may occur.
NOTE
Interior electrical wiring is performed at the
factory. Required customer wiring is minimal,
but should be done by a qualified electrician
in compliance with OSHA, National Electrical
Code, and/or any other applicable State,
Federal, and local electrical codes concern-
ing isolation switches, fused disconnects,
etc. Sullair provides a wiring diagram for use
by the installer.
NOTE
Customer must provide electrical supply
power disconnect within sight of machine.
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