Commonly Used Tools; Troubleshooting; Service Instructions; Possible Causes - Midea CD400 Service Manual

Commonly Used Tools

For the sake of safe and efficient manipulation, you should prepare and learn to
use the following tools prior to servicing the dishwater: plus screwdriver, minus
screwdriver, H screwdriver, torque spanner, OTK caliper and universal meter.
Attention: never measure the resistance of live cord. Otherwise, you measuring
device may be damaged.
Trouble Shooting
Phenomena
1. Dishwater does not work when
turned ON (No power indication).
2. Small or no incoming
water.
3. Overflowing incoming water.
4. Drainage activates again and
again without washing.
5. Timer does not work.
6. Incomplete drainage.
7. Leakage.
8. Dishwater powder retained in
the powder trough.
9. No brightness liquid from
dispenser.
10. Bad dispenser sealing

Possible Causes

Power socket defect.
Power cord defect.
Broken timer cord.
L o c k m a l f u n c t i o n .
Power switch failure.
Twisted inlet hose.
Excessive lower water pressure or
blocked water tap.
Inlet valve malfunction or blocked valve
filter.
Working pressure switch failure.
W o r k i n g a n d p r o t e c t i o n
pressure switches failure.
Inlet valve core will not close.
Timer failure.
Protection or working pressure
switch failure.
Incorrect cord connection.
Timer cord failure.
Timer failure.
Heating element failure (for heated
washing).
Thermostat failure.
Insufficient water.
Twisted or blocked drain hose.
Pump motor failure.
Tilted dishwater.
Unlocked door.
Broken connecting hose in
dishwasher.
Aged gasket.
Loose or defect inlet valve
connector.
Damaged pump.
Pump gasket failure.
Caked dishwater powder.
Dishes block the water flow to the
dishwasher powder.
No brightness liquid in dispenser.
Electromagnetic valve does not
work.
Sealing cap failure.
Broken dispenser case.
1

Service Instructions

Check socket.
See power cord.
See timer.
See door lock assembly.
See option switch and power switch.
Straighten up the inlet hose.
Check the water tap.
Check the inlet valve.
S e e p r o t e c t i o n a n d w o r k i n g
p r e s s u r e s w i t c h e s a n d c h e c k
appropriate connecting wires.
S e e p r o t e c t i o n a n d w o r k i n g
pressure switches.
See inlet valve.
See timer.
S e e p r o t e c t i o n a n d w o r k i n g
pressure switches.
See inner connecting wires.
See connecting wires.
See timer.
See heating element.
See thermostat.
See 2.
Check drain hose.
See water pump motor assembly.
Adjust the machine foot.
Lock the door.
Replace connecting hose.
Replace gasket.
Tighten the inlet valve. See inlet valve.
Reconnect the pump and the sump,
add gasket at the connector and
tighten the wedge.
See water pump motor assembly.
See dishwater powder and
brightness liquid.
See loading of dishes.
See dispenser and inner
connecting wires.
Replace dispenser.