Add Bleach Led; Delta Variable Frequency; Delta Vfd Dynamic Braking; Cooling Fan - Dexter Laundry T-300 Service Procedures And Parts Data

Machine Electrical & Wiring Schematics
Add-Bleach LED
This LED light indicates to the user the correct time to add bleach. This LED is polarity sensitive
and must be connected correctly.
Delta Variable Frequency Drive:
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.
The voltage should measure 208 Volts to 240 Volts A.C. between phases and connected to if
connected to 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 and quantities), are connected in parallel and attached to the drive at terminals B1
and B2. These resistors allow voltage, which is generated by the motor when decelerating, to be
dissipated. They will become hot while the motor is slowing 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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