Step 4.3 Performing Final Check And Trial Operation - Samsung MV Series User & Installation Manual

Step 4.3 Performing final check and trial
operation
1. Check the following:
• Strength of the installation site
• Tightness of pipe connection to detect gas leak
• Electric wiring connection
• Heat-resistant insulation of the pipe
• Drainage
• Grounding conductor connection
• Correct operation (Take the following steps.)
2. Press the (Power) button on the remote
control to check the following:
• The indicator on the indoor unit lights up.
• The airflow blade opens and the fan gears up for
operation.
3. Press the (Mode) button to select Cool mode.
Then take the following sub-steps:
• In Cool mode, use the Temperature button to set the set
temperature to 16 °C.
• Check whether, approximately 3 to 5 minutes later, the
outdoor unit starts, and a cool air blows out.
• After 12 minutes of stationary condition, check the
indoor unit air treatment.
4. Press the (Air swing) button to check
whether the airflow blades work properly.
5. Press the (Power) button to stop the trial
operation.
Pumping down refrigerant
Pump-down is an operation intended to collect all the system
refrigerant in the outdoor unit. This operation must be carried
out before disconnecting the refrigerant tubing in order to avoid
refrigerant loss to the atmosphere.
WARNING
• After installing the product, be sure to perform leak
tests on the piping connections. Before pumping down
refrigerant to inspect or relocate the outdoor unit,
be sure to stop the compressor and then remove the
connected pipes.
– Do not operate the compressor while a valve is
open due to refrigerant leakage from a pipe or
an unconnected or incorrectly connected pipe.
Failure to do so may cause air to flow into the
compressor and too a high pressure to develop
inside the refrigerant circuit, leading to an
50 English
explosion or product malfunction.
1. Shut off the liquid valve with the Allen wrench.
2. Turn on the air conditioner in cooling with fan
operating at high velocity. (Compressor will
immediately start, provided 3 minutes have
elapsed since the last stop.)
3. After 2 minutes of operation, shut the suction
valve with the same wrench.
4. Turn off the air conditioner and switch mains
supply off.
5. Disconnect tubing. After disconnection, protect
valves and tubing ends from dust.
CAUTION
• Compressor damage may occur if the compressor is run at a
negative suction pressure.
Pumping down for removing the product
1. Hold down the (Power) button on the indoor
unit for 5 seconds. Beep sounds immediately
to indicate that the product is ready for pump
down procedure.
2. Let the compressor run for more than 5 minutes.
3. Release the valve caps on High and Low
pressure side.
4. Use L-wrench to close the valve on the high
pressure side.
5. After approximately 1 minute, close the valve
on the low pressure side.
6. Stop operation of the air conditioner by
pressing the (Power) button on the indoor
unit or remote control.
7. Disconnect the pipes.