No Drain - Samsung DMT SERIES Service Manual

#2. No Drain

2-1. No Drain
Symptom
ㆍDishwasher doesn't drain.
Causes
ㆍDrain hose blocked
ㆍWater level sensor defective
ㆍDrain pump defective
ㆍMain PBA defective
Check Point
Step 1 : Drain Hose
Check if the drain hose is fold or kinked.
Check if drain hose is clogged or restricted
Step 2 : Water Level Sensor
Check the connections for the Water-level sensor.
Check for the operation of the Water-level sensor.
If it is faulty, replace the assembly case sensor and
remove foreign material from the float
If it is normal, replace the Main PBA assembly.
Step 3 : Drain Pump
Check the connections of the Drain Pump.
Check the resistance of the drain pump coils.
Drain Resistance : approximately 25Ω
If the value is not normal, replace the Drain pump.
Step 4 : Main PBA
Check the operation of the Drain Pump Relay.
→ Check for the operating voltage between the yellow wire of the Main PBA CN101
connector and the orange wire of the CN202 connector.
The Voltage : AC 120V (while operating)
If the value is not normal, replace main PBA.
Drain hose, water level sensor, drain pump, main PBA
0 7269#0