Outdoor Unit - Samsung AC026RN1DKG Service Manual

Troubleshooting

4-2-4 Outdoor Unit

No. Error Code
1 E108 Error due to duplicated communication address
Error on room temperature sensor of indoor unit
2 E121
(Short or 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) Indoor unit EVA_OUT Thermistor Open/Short
5 E153 Error on float switch (2nd detection)
6 E154 Indoor fan error
Error due to connecting outdoor units that do not
7 E164
support the Wind-Free function
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
8 E201 unit quantity setting on the 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
9 E202 unit (When there is no response from indoor units after
tracking is completed)
Communication error between the outdoor unit and
main micom (For PF #4 to #6 controllers, error will
10 E203
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
13 E251
(Short or Open)
14 E320 Error on OLP sensor (Short or Open)
15 E403 Compressor down due to freeze protection control
16 E404 System stop due to overload protection control
High Pressure Switch Error or High Pressure Switch
17 E407
Connector Open
18 E416 System stop due to discharge temperature
19 E422 Blockage detected on high pressure pipe
20 E425 Reverse phase or open phase
Heating operation restricted at outdoor temperature
21 E440
over Theat_high value (default:30°C)
4-16
Meaning Remarks
Check on repeated indoor unit main address
Indoor unit Room Thermistor Open/Short
Indoor unit EVA_IN Thermistor Open/Short
Indoor unit Float Switch Open/Short Drain Pump
operation Check
Check on indoor unit indoor Fan operation
Check outdoor main PBA S/W, Check outdoor EEPROM
data
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 Outdoor Cond.
Check Comp. when it starts
Check Comp Pressure or Check the Connection of the
CN003 on the MAIN-OUT PBA
-
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.
1. Check the range of temperature limited for heating
operation
2. Check the outdoor temperature sensor
Samsung Electronics