Drain Pump Disassembly - Toshiba DWS-22A Series Service Manual

Part name
Funtion
Steps of Disassemble
1. Disconnect the power
supply to the dishwasher.
Technical Data
Nominal voltage
Resistance
Delivery height
Delivery performance
The defeat point
1. The motor coil is broken, so the drain pump can't work. It will cause the E1 error .
2. The magnetism of motor rotor is weak, so drain pump cannot work. It will cause the E1 error .
3. The connector is loose, so the drain pump can't work. It will cause the E1 error .
4. The rotor is locked by residues, so the drain can't work . It will cause the E1 error .
5. The drain pump assembly rack is loose, it will cause noise.
6. The non-return valve is bad, the remain water is too much.
Explanatory notes: failure of drain pump may cause E1, because if the water has not drained
out, in next inflow process the pressure switch will act first to cut down the inlet valve, thus
no water will get in and E1 error will occur.
Drain Pump
Drain pump consists of electrical motor, impeller, inlet and outlet.
Drain pump is a kind of pump driven by permanent magnet synchronous motor. The
rotor is made with permanent magnet material, the running inertia of rotor is very small,
the stator consist of silicon steel stack and coil. When the drain pump is on power, the
rotor will be very easy to start.
2. Disconnect 2 wiring
harnesses (mark 1).
3. Rocate pump after pushing
the snap joint (mark 2).
Frequency
2
1
AC 220-240V
50Hz
235Ω±15Ω
1M
≥17l/min(230VAC)
4. Drain Pump Assembly
is removed.
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