Samsung DMR78AHS/XAC, Service Manual

Page: 40 / 106

4. Troubleshooting
4-2
4-2. Service Inspection Mode
- Press the Delay Start + Power keys at the same time for two seconds to enter Service Inspection Mode.
- “ALL” is displayed for the first three (3) seconds and then “t1” is displayed.
- You can change the mode by pressing the Normal key. Each time the Normal key is pressed, the mode changes in the order of t1 → t2 → t3 → t4 → t5 → t6 → t7 → t8.
- If you want to activate a mode while operating the dishwasher, the door must be closed (The Door switches are ON.)
- If an “oE”, “LE” or “tE1” error occur, make sure to enter Service Inspection Mode after resolving it.
- Service Inspection Mode is described in the following table.
Mode Related parts Symptoms Note
t1
Inlet Valve
Flow Meter
Low Level Sensor
4E
9E
If you press the Delay Start key, water is drained for 45 seconds and then the water supply starts.
If the pulse count is more than 660, change the mode.
Make sure to change the mode when the pulse count is more than 660 in t1 mode.
t2 Circulation Motor
A nozzle does not inject
water.
1. Press the Delay Start key to start or stop the Circulation Motor.
2. If a low water level is detected, water is supplied again and the operation continues.
t3
Circulation Motor
Heater
Thermistor
HE
1. Press the Delay Start key to start or stop the heater and the circulation Motor.
2. If a low water level is sensed, water is supplied again and the operation continues.
3. The current temperature is shown on the display.
4. If the water temperature is more than 70ºC, the Heater does not operate.
t4 Fan Motor
The Fan Motor does not
operate.
Press the Delay Start key to start or stop the Fan Motor.
t5
Drain Pump
Low Level Sensor
5E
1. Press the Delay Start key to start the 2 parts.
2. When draining is finished, “t5” is blinking on the Display LED.
t6 Low Level Sensor
When the Micro Switch
is turned on/off, there is
no change on the display
or a symbol other than
On/OFF is displayed.
1. MICRO SWITCH On
→ The sensing state is displayed as ‘On’ on the 88 segment display.
2. MICRO SWITCH Off
→ The sensing state is displayed as ‘OFF’ on the 88 segment display.
t7 Thermistor
There is no change in the
water temperature.
The current temperature is displayed.
t8
Half Load Position of
Distributor Motor
Micro Switch
(DMR77 Model)
PE
1. If you press the Delay Start key, the parts operate just once.
2. There is no stop function.
3. While the Distributor Motor is operating, its sensing state is displayed as On/OFF on the 88 segment display.
4. When the Distributor Motor stops, the sensing state (On/OFF) of the Micro Switch is displayed.
Caution
If it has the power problem, you must check the FUSE first.
This dishwasher has the FUSE upon the Base. Refer to the 4-10 page.