If Error Code Is Displayed On Indoor Or Outdoor Led, Check As Follows - Samsung AJ009JNNDCH Service Manual

If Error code is displayed on indoor or outdoor LED, check as follows;

- Manaul address setting
Q1 Turn on the system. But outdoor units PCB displayed E201 or E101 Error code.
Step 1 Check to Number of indoor unit's SW01.
Check to power cable to indoor units.
Step 2
Check to communication cable indoor units.
Q2 Turn on the system. But outdoor units PCB displayed E203 Error code.
Outdoor communication error between the outdoor main
Guidance
Step 1 Check to sub PCB wire and replace it.
Q3
Turn on the indoor units. But indoor unit displayed E121/122/123/154 Error code.
Error code
Indoor unit room temperature sensor error (open/short)
E121
Indoor unit heat exchanger in temperature sensor error (open/short)
E122
Indoor unit heat exchanger out temperature sensor error (open/short)
E123
Indoor unite fan error
E154
Please, all units turn off and check to indoor unit's PCB and wire connection. E121/122/123 error detected, replace
Guidance
related sensor.
Q4
Turn on the system. But indoor unit displayed E162/163 Error code.
Error code
Indoor unit EEPROM Error.
E162
Indoor unit EEPROM Option Error.
E163
Please, all units turn off and follow guidance.
E163 : Please reset indoor Option code.
Guidance
E163 : If you don't know about that, replace indoor unit PCB which is related.
E162 : Please replace indoor unit PCB which is related.
Q5 Turn on the system. But outdoor unit displayed E221/237/251/320 Error code.
Error code
Outside temperature sensor error (open/short)
E221
Indoor unit heat exchanger in temperature sensor error (open/short)
E237
Condenser temperature sensor error (open/short)
E251
Compressor Discharge temperature sensor error (open/short)
E251
Compressor OLP sensor error (open/short)
E320
Please, The System turn off and replace sensor which is related.
Guidance
4-20
Contents
Check point
Contents
Check point
PCB and sub PCB.
Contents
Contents
Contents
Remarks
Outdoor PCB
Wire connect
Remarks
Outdoor PCB
Wire connect
Explanation
Explanation
Explanation
SW01
SW01
Samsung Electronics