Appendix; Troubleshooting - Samsung AC BXAP G Series Installation Manual

Appendix

Troubleshooting

The table below list the self-diagnostic routines. For some of error codes, you must contact an authorized service centre.
If an error occurs during the operation, it is displayed on the outdoor unit PCB LED, both MAIN PCB and INVERTER PCB.
No. Error Code
1 E108 Error due to duplicated communication address
Error on room temperature sensor of indoor unit (Short or
2 E121
Open)
3 E122 Error on EVA IN sensor of indoor unit (Short or Open)
4 E123 Error on EVA OUT sensor of indoor unit (Short or Open)
5 E153 Error on float switch (2nd detection)
6 E154 Indoor fan error
7 E198 Error on thermal fuse of indoor unit (Open)
Communication error between the indoor unit and outdoor
unit (Pre-tracking failure or when the actual number of indoor
units are different from the indoor unit quantity setting on the
8 E201
outdoor unit)
Error due to communication tracking failure after initial power
is supplied (The error occurs regardless of the number of units.)
Communication error between indoor unit and outdoor unit
9 E202 (When there is no response from indoor units after tracking is
completed)
Communication error between the outdoor unit and main
10 E203 micom (For PF #4 to #6 controllers, error will be determined
from the time when the compressor is turned on.)
11 E221 Error on outdoor temperature sensor (Short or Open)
12 E231 Error on outdoor COND OUT sensor (Short or Open)
Error on discharge temperature sensor of compressor 1 (Short
13 E251
or Open)
14 E320 Error on OLP sensor (Short or Open)
15 E321 Error on ESC IN temperature sensor (Short or Open)
16 E322 Error on ESC OUT temperature sensor (Short or Open)
17 E403 Compressor down due to freeze protection control
18 E404 System stop due to overload protection control
19 E416 System stop due to discharge temperature
Blockage detected on high pressure pipe during cooling
20 E422
operation
21 E425 Reverse phase or open phase
Meaning Remarks
Check on repeated indoor unit main address
Indoor unit Room Thermistor Open/Short
Indoor unit EVA_IN Thermistor Open/Short
Indoor unit EVA_OUT Thermistor Open/Short
Indoor unit Float Switch Open/Short Drain Pump operation
Check
Check on indoor unit indoor Fan operation
Thermal Fuse Open Check of indoor unit Terminal Block
Check indoor quantity setting in outdoor
Check electrical connection and setting between indoor unit
and outdoor unit
Check electrical connection and setting between outdoor
unit MAIN PBA - INVERTER PBA
Check Outdoor sensor Open / Short
Check Cond-Out sensor Open / Short
Check Discharge sensor Open / Short
Check OLP sensor Open / Short
Check ESC IN sensor Open / Short
Check ESC OUT sensor Open / Short
Check Outdoor Cond.
Check Comp. when it starts
-
1. Check if the service valve is open
2. Check for refrigerant leakage (pipe connections, heat
exchanger) and charge refrigerant if necessary
3. Check if there's any blockage on the refrigerant cycle
(indoor unit/outdoor unit)
4. Check if additional refrigerant has been added after pipe
extension
Check whether 3 phase is reversed or opened.
English 35