Ceiling Type - Samsung AM007FN1DCH/AA Service Manual

Troubleshooting

- Ceiling type

■ Error detection and reoperation
●
If an error occurs during the operation, an LED flickers and the operation is stopped except the LED.
●
If you re-operate the air conditioner, it operates normally at first, then detect an error again.
■ Indoor unit LED lamp display at error detecting
Abnormal condition
Error on indoor temperature sensor (Short or Open)
1. Error on Eva-in sensor (Short or Open)
2. Error on Eva-out sensor (Short or Open)
Indoor fan error
1. Error on outdoor temperature sensor (Short or Open)
2. Error on cond sensor
3. Error on discharge sensor
1. When there is no communication between the indoor∙outdoor units for
2 minutes
2. Communication error received from the outdoor unit
3. 3 miniute tracking error on outdoor unit
4. Communication error after tracking due to unmatching number of
installed units
5. Error due to repeated communication address
Self diagnosis error display
1. Error due to opened EEV (2nd detection)
2. Error due to closed EEV (2nd detection)
3. Eva in sensor is detached
4. Eva out sensor is detached
5. Thermal fuse error (Open)
1. COND mid sensor is detached
2. Refrigerant leakage (2nd detection)
3. Abnomally high temperature on Cond (2nd detection)
4. Low pressure s/w. (2nd detection)
5. Abnomally high temperature on discharged air on outdoor unit. (2nd detection)
6. Indoor operation stop due to unconfirmed error on outdoor unit
7. Error due to reverse phase detection
8. Comp stop due to freeze detection (6th detection)
9. High pressure sensor is detached
10. Low pressure sensor is detached
11. Outdoor unit copression ration error
12. Outdoor sump down_1 prevetion control
13. Compressor down due to low pressure sensor prevention control_1
14. Simultaneous opening of cooling/heating MCU SOL valve (1st detection)
15. Simultaneous opening of cooling/heating MCU SOL valve (2nd detection)
Flowating s/w (2nd detection)
EEPROM error
EEPROM option error
Error due to incompatible indoor unit
- If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
- If you re-operate the air conditioner, it operates normally at first, then detect an error again.
4-28
Error
code
E121
E122
E123
E154
E221
E237
E251
E101
E102
E202
E201
E108
E151
E152
E128
E128
E198
E241
E554
E450
E451
E416
E559
E425
E403
E301
E306
E428
E413
E410
E180
E181
E153
E162
E163
E164
LED Display
: On : Flickering
Samsung Electronics
: Off