Samsung AC***KX4D*H Series Installation Manual page 24

Installation Procedure
2 Check the indoor unit.
a Check that you have connected the power and
communication cables correctly. (If the power
cable and communication cables one mixed up or
connected incorrectly, the PCB will be damaged.)
b Check that the thermistor sensor, drain pump/
hose, and display are connected correctly.
3 Press K1 or K2 on the outdoor unit PCB to run the
test mode and stop.
• Press K1 button → Start Heating test mode →
Press K1 button → Stop → Heating test mode
7-seg display:
• Press K2 button → Start Cooling test mode →
Press K2 button → Stop → Cooling test mode
7-seg display:
• Press K1 button twice → Start Defrost test mode
→ Press K1 button → Stop → Defrost test mode
7-seg display:
• Press K2 button twice → Start Inverter Checker
mode → Press K2 button → Stop → Inverter
Checker mode 7-seg display:
Condition 1: The outdoor temperature is under
10°C
Condition 2: All the temperature conditions should
meet the defrost conditions
AC090/100/120/140KX4D✴H
K1
24
English
Outdoor unit
AC071KX4DKH
K1 K2 K3 K4
Outdoor unit
K2 K3 K4
4 After 12 minutes of stationary condition check each
indoor unit air treatment:
• Cooling mode (indoor unit check) → Inlet air temp.
- Outlet air temp.: From 10°C to 12°C
• Heating mode (indoor unit check) → Outlet air
temp. - Inlet air temp.: From 11°C to 14°C
• In heating mode, the indoor fan motor can remain
off to avoid cold air blown into air-conditioned
space.
5 How to reset the power supply of the outdoor unit
and deactivate the eco mode (standby mode):
• Outdoor unit types A, B, and C: Refer to Outdoor
unit dimensions on page 6.
• Press K3 button over 1 sec to reset the power
supply of the outdoor unit and deactivate the eco
mode (standby mode).
6 View mode: When the K4 switch is pressed, you can
see information about our system state as below.