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DELTA Variable Ferquency Drive POWER:
Mains power is connected to terminals L1, L2, and L3 on the Delta drive. If the
washer is connected to a three phase source, there should be voltage present on all
three terminals. If the washer is connected to single phase power, there should be
voltage present on terminals L1 and L2.
The voltage should measure 208 Volts to 240 Volts A.C. between phases and
connected to if connected between three phase). There is a tolerance of
+ 10% on the
mains voltage (187 Volts to 264 Volts).
DELTA VFD MOTOR LEADS:
The wires from the motor are connected to terminals T1, T2, and T3.
Since this drive uses pulse width modulation, an accurate current or voltage
reading is not possible. Although an accurate current reading is not possible, a
balanced current reading should be present while the motor is running.
DELTA VFD DYNAMIC BRAKING RESISTORS:
Two, 160 Ohm or 200 Ohm braking resistors (Please check your washer model
parts requirements), are connected in parallel and attached to the drive at terminals
B1 and B2. These resistors allow the voltage, which is generated by the motor
when decelerating, to be dissipated. They will become hot while the motor is slow-
ing down, so care should be taken so as not to come in contact with them. This will
prevent an electrical shock and/or a physical burn.
DELTA VFD COOLING FAN:
There is a cooling fan attached to the bottom of the Delta drive. This fan will
operate when the internal temperature of the drive reaches a predetermined level,
the same way the radiator fan in a newer car operates.
THE FAN CAN OPERATE
ANYTIME POWER IS APPLIED TO THE DRIVE! Remove power to the drive if
work is required around the fan.
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