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Installation Procedure
CAUTION
∙ Install the drain hose in a downward direction.
∙ Water leakage may occur when the drain hose is not
firmly fixed with a cable tie or tape.
∙ If there is any foreign substance in the drain pan,
it may clog the drain hose. Be sure to remove the
foreign substance after installation.
∙ Do not use the drain hose connected by multiple
drain hoses.
– Water may leak from the extension connection
part. Install the drain hose for each piece.
– If its length is too short and you cannot avoid
the connecting multiple drain hoses, be sure to
use silicone sealant or other material for water-
proofing. Do not use the insulating tape.
Step 17 Checking the earthing
Before supplying main power, use a DC 500V insulation
resistance tester to measure the resistance between the
power terminals (L, N) and the outdoor unit earthing.
Make sure that the measurement comes to 30 MΩ.
CAUTION
∙ Do not test the communication terminals with the DC
500V insulation resistance tester. Failure to do so may
damage the communication circuit.
∙ Use a common circuit tester to test the
communication terminals for open or short circuit.
Step 18 Performing the final check and
trial operation
1 Check the power supply between the outdoor unit
and the auxiliary circuit breaker.
∙ 1 phase power supply: L, N
2 Check the indoor unit.
∙ 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.
∙ Check that the thermistor sensor, drain pump/hose,
and display are connected correctly.
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English
3 Press K2 on the outdoor unit PCB to run the test
mode and stop.
∙ Press K2 button → Start Cooling test mode → Press
K2 button three times → Stop → Cooling test mode
7-seg display:
∙ Press K2 button twice → Start Inverter Checker
mode → Press K2 button twice → Stop → Inverter
Checker mode 7-seg display:
∙ Press K2 three times → Start Pump down mode →
Press K2 button → Stop → Pump down mode 7-seg
display:
AF36MV1MAEEXTC
AF48MV1MAEEXTC
K1
K2
K3
4 After 12 minutes of stationary conditions check each
indoor unit air treatment:
∙ Cooling mode (indoor unit check) → Inlet air temp. -
Outlet air temp.: From 10°C to 12°C
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: Press the K3 button
for over 1 second to reset the power supply of the
outdoor unit and deactivate the eco mode (standby
mode).
K1
K2
K3
K4
K4
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