Daewoo KUD-UD122RF, Service Manual, Page: 48 / 86

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4-1 Load operation test mode
: You can easily check the operational status of each load and PCB assy.
1) How to enter
: Power S/W on -> While holding down the washing button, turn on the spin button three times -> The custom LED
window displays ‘Ld’. –> Each time you press the water temperature button, the load operates as follows.
MICOM version -> L C (lock close) _> run -> b1,b2,b3,b4,b5,b6,b7 -> F (fan motor) -> H (Hot v/v) ->C (Cold v/v) ->
P (Pre-washing v/v) -> d ( dry v/v) -> bb (bubble) ->L1 (Liquid detergent auto injection device’s sync motor) -> L2
(softener auto injection device’s sync motor) ->dr (water discharge sync motor) -> L O (Lock S/W open)
**Motor error related items
1. b1: Hole sensor signal not received
2. b2: IPM FAULT (overcurrent) error
3. b3: Motor start
4. b4: Motor align error (RPM not equal to zero one minute after the motor brake starts operating.)
5. b5: The difference between the target RPM and the current RPM is greater than 120 RPM.
6. b6: Overvoltage error (detects more than 450V)
7. b7: Undervoltage error (detects more than 140V)
2) Characteristics
1. All the electrical components can operate when MICOM successfully detects the closed door (LC, Lock Close) and the
custom LED’s Lock lamp is on.
It takes 0.5 to 1 seconds until the MICOM detects the closed door since it is actually closed.
2. While operating the load, it checks various sensors such as washing, drying temperature and water level. If any defect
is found, an error message is displayed.
3. The main BLDC motor is not inspected. To inspect the main motor, a spin or washing cycle should be selected.
4. If the water level sensor, main motor hall IC, drying temperature sensor or washing temperature sensor malfunctions,
an error message will be shown in test mode.
5. Motor operation is omitted. To check motor operation, you need to select a washing or spin cycle.
4. Test Mode