Samsung AC026MN1DKH/EU - Troubleshooting for Outdoor Unit

4-22 Samsung Electronics
4-3-5 Troubleshooting for outdoor unit
No. Error Code Meaning Remarks
1 E121 Error on r oom temperature sensor of indoor unit (Short or Open) Indoor unit Room Thermistor Open/Short
2 E122 Error on EVA IN sensor of indoor unit (Short or Open) Indoor unit EVA_IN Thermistor Open/Short
3 E123 Err or on EVA OUT sensor of indoor unit (Short or Open) Indoor unit EVA_OUT Thermistor Open/Short
4 E153 Err or on float switch (2nd detection)
Indoor unit Float Switch Open/Short Drain
Pump operation Check.
5 E154Indoor fan error
Check on indoor unit indoor Fan oper-
ation
6E198 Error on thermal fuse of indoor unit (Open)
Thermal Fuse Open Check of indoor unit
Terminal Block
7 E201
Communication error between indoor unit and outdoor unit
(Pre tracking failure or when actual number of indoor units are
different from
the indoor unit quantity setting on the outdoor
unit) Error due to communication traking failure after initial
power is supplied. (The error occurs regardless of the number
of units.)
Check indoor quantity setting in out-
door
8 E202
Communication error between indoor unit and out door unit
(When there is no response from indoor units after tracking is
completed)
Check electrical connection and set-
ting between indoor unit and outdoor
unit
9 E203
"Communication error between outdoor unit inv - main micom
'PS1'_DPOUSPMMFSFSSPSXJMMCFEFUFSNJOFEGSPNUIFUJNF
when compressor is turned on)"
Check electrical connection and set-
ting between indoor unit MAIN PBA -
INVERTER PBA
10 E221 Error on outdoor temperature sensor (Short or Open) Check Outdoor sensor Open / Short
11 E231Error on outdoor COND OUT sensor (Short or Open)
Check Cond-Out sensor Open / Short
12 E251
Error on discharge temperature sensor of compressor 1 (Short or
Open)
Check Discharge sensor Open / Short
13 E320
Error on OLP sensor (Short or Open) Check OLP sensor Open / Short
14 E403 Compressor down due to freeze protection control Check Outdoor Cond.
15 E404
System stop due to overload protection control Check Comp . when it start
16 E416 System stop due to discharge temperature -
17 E422 Blockage detected on high pressure pipe
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
refrigerant cycle(indoor unit/
outdoor
unit)
4. Check if additional refrigerant has
been added after pipe extension
18 E425Reverse phase or open phase
Check whether 3 phase is reversed or
opened.
19 E440
Heating operation restricted at out door temperature over
Theat_high value (default: 30
C)
HEATING
20 E441
Cooling operation restricted at outdoor temperature below
Tcool_low value (default: 0 C)
COOLING
21 E458 Fan speed error FAN1 ERROR
22 E461 Error due to operation failure of inverter compressor -
23 E462 System stop due to full
curr en t control-