Electric Drive Module - Graco MP-25 Operation

Electronic Drive module – 20000046 / 47
Function
The drive module takes the input power via an isolator and breakers and supplies to the
drive motor via an adjustable frequency phase inverter. Prior to the power being provided
to the motor various additional functions have to be completed, such as water pressure
signal, and remote present / by-passed. The module runs at full speed after a 2 second
acceleration period at an operator selected speed chosen from three preconfigured
options, when the "Start" button is pressed either on the panel or on the remote. The unit
decelerates to zero RPM following the "Stop" button being pressed on either the panel or
the remote.
Whenever the reverse switch is actuated, the unit will turn in reverse, either from
stationary or from a forward running condition after decelerating to rest. Upon the unit
turning in reverse, the water solenoid is de-energized, until forward motion is reselected.
Important Note (equipment damage only):
The control module is resistant to water splashes, ONLY when the fan cowl is fitted.
Failure to keep the cowl in place allows water splashed under the machine top cover to
enter into the box allowing contact with the internal electrical components and causing
damage.
After each use and subsequent clean down, the module must be disconnected from the
electrical supply, opened and the inside inspected for debris and / or water ingress. ALL
water and debris must be removed immediately, using wipe cloths then compressed air.
The electronic drive module contains a variable speed frequency inverter to run a high
torque 3-phase gear motor. The inverter unit is rated at 7.5 HP, providing plenty of power
to run the MP-25 unit. See the Technical specifications for the input voltage for specific
models.
The module is supplied with an input plug allowing immediate wiring into your own
electrical supply (Must be carried out by an approved installer). The motor is supplied
with a pre-wired plug that fits into the 3 Phase outlet of the drive module.
The module has a main power isolator, a combined stop / start switch, a spring loaded
reverse switch, a speed control (three speed positions), a series of indicator lights, an
inverter drive, internal breakers for each input phase, a water pump motor switch /
contactor, a water pressure switch relay, and a large capacity cooling fan, with removable
shroud and filter enclosure, in addition to the fan fitted to the inverter, a water pump
connection socket, a water pressure switch socket and a water solenoid socket, a remote
socket providing the optional capability for remote operation.
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