Troubleshooting For Outdoor Unit - Samsung AC052MNCDKH Service Manual

4-3 Troubleshooting for outdoor unit

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
outdoor unit)
8 E201
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 E403 Compressor down due to freeze protection control
16 E404 System stop due to overload protection control
17 E416 System stop due to discharge temperature
Blockage detected on high pressure pipe
18 E422
Reverse phase or open phase
19 E425
Heating operation restricted at outdoor temperature over
20 E440
Theat_high value
Cooling operation restricted at outdoor temperature below
21 E441
Tcool_low value
Fan speed error
22 E458
Samsung Electronics
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 indoor 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
-
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.
HEATING
COOLING
FAN1 ERROR
4-13