When The Auto Shutter Does Not Operate(“E2” Error Mode) - Samsung APH180HD Service Manual

Troubleshooting
5-3-8 When the auto shutter does not operate("E2" error mode)
1) Trouble cause
1 Disconnection of the motor harness wire or bad contact.
2 Disconnection or bad contact of sensor PCB connection harness.
3 Sensor PCB defect.
4 Main PCB defect: CN02, RY79, RY80 defect.
5 Defect by the structural interfere n c e .
6 Main PCB defect.
2) Check items
1 Is the power voltage normal?(AC 187V ~ A C 2 5 3 V )
2 Is the shutter motor connector(CN77) good?
3 Is the sensor PCB connection harness good?
4 Is the resistance of relay RY78, RY80 400l?
3) Sequence of check
1 In operating(Opening the door)
Tu rn off the power, and then turn it on in 5 seconds.
P ress the start/stop button.
Is the voltage across the relay (RY81) coil approximately 12V?
(Check while the door is being opened.)
Is it "high" when check the output wave of MICOM pin no. 10?
(Check while the door is being opened.)
Is it "low" when check the output wave of MICOM pin no. 10?
(Check while the door is being opened.)
Is the voltage across thd door motor(CN17#1, #3)(187V~253V)?
(Check while the door is being opened.)
Check the door motor and replace it.
5-10
Y
Y
Y
Y
N
Check the relay and replace it.
N
Check MICOM(IC01) and replace it.
Y
Check IC03 and replace it.
N
Check the relay and connection wire harness disconnection.
Samsung Electronics