Samsung AF HV Series User & Installation Manual page 61

Failure diagnosis
When error occurs during operation, error mode will appear on the outdoor unit MAIN PCB display and inverter PCB display.
Error
NO Description
code
Indoor room
1 E121
temperature sensor
Error on IN temperature
2 E122 sensor of the indoor
unit heat exchanger
Error on OUT
temperature sensor of
3 E123
the indoor unit heat
exchanger
4 E154 Error on indoor fan
Communication error
E202 or between outdoor unit
MAIN PCB and indoor
5
No
unit MAIN PCB
display
No display: Abnormal
Communication error
between outdoor unit
6 E203
MAIN PCB and inverter
Outdoor unit suction
7 E221 temperature sensor
E231
Outdoor unit
8
Condenser sensor error
E246
E251
Discharge temperature
9
sensor error
E261
10 E320 OLP sensor error
Freezing detected in
indoor unit
11 E403
(When compressor is
stopped)
Outdoor unit overload
protection control
12 E404
(When compressor
Compressor discharge
temperature protection
13 E416 control
(When compressor
Measures to be taken by installer
1. Re-connect the connector
1. Re-connect the connector
1. Re-connect the connector
1. Check the short-circuit and
connection of the communication
cable between indoor and
outdoor unit
2. Check outdoor unit power
3. Check the power and
communication cable for
misconnection
PCB
1. Re-connect the connector
error
1. Re-connect the connector
1. Re-connect the connector
1. Re-connect the connector
1. Check for any blockage on air inlet
of indoor unit
1. Change the location or direction of
the outdoor unit
stops)
1. Check for leakage on connected
part between the product and
pipe, and pipe and extended pipe
2. Change the location or direction of
stops)
the outdoor unit
ENGLISH-61
Measures to be taken by service
1. Re-connect the connector
2. Replace the sensor
1. Re-connect the connector
2. Replace the sensor
1. Re-connect the connector
2. Replace the sensor
1. Re-connect the connector of indoor fan
- 2. Replace the motor
3. Replace the PBA
1. Re-connect the communication cable and
check for short-circuit
2. Check the power of outdoor unit
3. Check/Replace the indoor unit PBA
4. Check/Replace the outdoor unit PBA
1. Check for any problem on outdoor unit
motor
-
2. Replace the outdoor unit PBA
1. Re-connect the connector
2. Replace the sensor
1. Re-connect the connector
2. Replace the sensor
1. Re-connect the connector
2. Replace the sensor
1. Re-connect the connector
2. Replace the sensor
1. Check for any blockage on air inlet of
indoor unit
2. Check for indoor fan operation
1. Re-install the outdoor unit
1. Find and block the leaking part and re-
charge the refrigerant
2. Re-install the outdoor unit
technician