Samsung DMR57 Series, Training Manual

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No Drain Troubleshooting - Error 5E
Check to make sure the drain hose is not clogged and that the low level sensor is
good.
Check the operation of the Drain Pump Relay: Check the operating voltage between
the White wire of CN1 Pin 1 on the Main board and the Orange wire of CN14 Pin 8.
Normal: 120VAC (while operating)
- Faulty: Replace the Main PCB ASSY.
- Normal: Replace the Drain Pump.
A good drain motor should measure ~ 25 Ω
For drain problems, never assume that the drain pump is defective without checking
other items first. Make sure the drain is clear, check the drive voltage is being sent
to the pump motor. If the voltage is present at the board, check it at the pump,
there might be a wiring harness problem that ranges from an open wire to nothing
more than a loose connector. Use the service and test procedures to manually turn
on this device.