Troubleshooting
4-2 Samsung Electronics
4-2 Outdoor Trouble shooting
The table below give indication about self diagnostic routine. Some of error code requires activities exclusively
for Authorized Service Center.
Outdoor unit
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 Meaning Remarks
1 E108
Error due to repeated address setting(when 2 or more devices has
same address within the network)
Check on repeated indoor unit main address
2 E121 Error on indoor temperature sensor of indoor unit(Short or Open) Indoor unit Room Thermistor Open/Short
3 E122 Error on EVA IN sensor of indoor unit(Short or Open) Indoor unit EVA_IN Thermistor Open/Short
4 E123 Error on EVA OUT sensor of indoor unit(Short or Open) Indoor unit EVA_OUT Thermistor Open/Short
5 E153 Error on float switch (2nd detection)
"Indoor unit Float Switch Open/Short Drain Pump
operation Check"
6 E154 RPM feedback error of indoor unit Check on indoor unit indoor Fan operation
7 E162 Outdoor unit EEPROM Read/Write error (H/W) Check Outdoor EEPROM PBA
8 E163 Outdoor unit EEPROM Read/Write error (Option) Check Outdoor EEPROM Data
9 E198 Error on thermal fuse of indoor unit (Open)
Thermal Fuse Open Check of indoor unit Terminal
Block
10 E201
"Communication error between indoor and outdoor
unit(Installation number setting error repeated
indoor unit address,indoor unit communication cable error)"
Check indoor quantity setting in outdoor
11 E202
"Communication error between indoor and outdoor
unit(Communication error on all indoor unit,
outdoor unit communication cable error)"
Check electrical connection and setting between
indoor unit and outdoor unit
12 E205
Communication error on all PBA within the outdoor unit
C-Box,communication cable error
-
13 E206
E206-C002 : Fan PBA communication error, E206-C003 : INV PBA
communication error
-
14 E221 Error on outdoor temperature sensor (Short or Open) Check Outdoor sensor Open / Short
15 E231 Error on outdoor COND OUT sensor (Short or Open) Check Cond-Out sensor Open / Short
16 E251
Error on discharge temperature sensor of compressor 1 (Short or
Open)
Check Discharge sensor Open / Short
17 E320 Error on OLP sensor (Short or Open) Check OLP sensor Open / Short
18 E346 Error due to operation failure of Fan2 FAN2 error
19 E347 Motor wire of Fan2 is not connected FAN2 error
20 E348 Lock error on Fan2 of outdoor unit FAN2 error
21 E353 Error due to overheated motor of outdoor unit's Fan2 FAN2 error
22 E355 Error due to overheated IPM of Fan2 FAN2 error
23 E378 Error due to overcurrent of Fan2 FAN2 error
24 E386 Over-voltage/low-voltage error of Fan2 FAN2 error
25 E387 Hall IC connection error of Fan2 FAN2 error
26 E389 V-limit error on Fan2 of compressor FAN2 error
27 E391 Error due to DataFlash of Fan2 FAN2 error
28 E393 Output current sensor error of Fan2 FAN2 error
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