Outdoor Unit - Samsung AC026RN1DKG Service Manual

Troubleshooting

4-2-4 Outdoor Unit

No. Error Code
1 E108 Error due to duplicated communication address Check on repeated indoor unit main 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) 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)
6 E154 Indoor fan error
Error due to connecting outdoor units that do
7 E164
not 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
8 E201 from the indoor 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
9 E202 outdoor 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,
10 E203
error will be determined from the time when
the compressor is turned on.)
Error on outdoor temperature sensor (Short or
11 E221
Open)
12 E231 Error on outdoor COND OUT sensor (Short or Open) Check Cond-Out sensor Open / Short
Error on discharge temperature sensor of
13 E251
compressor 1 (Short or Open)
14 E320 Error on OLP sensor (Short or Open)
15 E403 Compressor down due to freeze protection control Check Outdoor Cond.
16 E404 System stop due to overload protection control Check Comp. when it starts
High Pressure Switch Error or High Pressure
17 E407
Switch Connector Open
18 E416 System stop due to discharge temperature
19 E422 Blockage detected on high pressure pipe
4-16
Meaning Remarks
Indoor unit Room 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 Discharge sensor Open / Short
Check OLP sensor Open / Short
Check Comp Pressure or Check the Connection
of the CN003 on the MAIN-OUT PBA
(Error that only covers an outdoor unit capacity
of 7.1 KW or less)
-
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
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