Samsung AM072BXV Series Service Manual page 74

Troubleshooting
4-2 Service Operation (cont.)
4-2-1 Special Operation (cont.)
■ Cooling Pump Down
► Recover the refrigerant of Indoor Unit and Piping to outdoor side.
► Liquid pipe service valve and the gas pipe service valve operation, the operator manually need to close.
► If the installation of the long pipe : Any refrigerant into the outdoor unit can not be recovered, therefore should use a separate container.
► Observe low pressure using View Mode of K4 button if compressor operate.
If low pressure goes down below about 0.2 MPa.g : Immediately lock the gas side service valve, Pump Out operation is shut down.
(Pump out operation shut down : K1 button once more press or K3 button one time press)
► If operation of low pressure goes down below 0.1 MPa.g : Will be stopped automatically for the protection of the compressor.
How to Initiate
Compressor
Indoor Unit
4Way Valve
Outdoor Fan
Main EEV
Maximum Operation Time
Etc.
■ Vacuum Operation
► Operation to facilitate vacuum to open the valve after the Outdoor Unit repair.
How to Initiate
Compressor
Indoor Unit/Outdoor Fan
4Way Valve
Valves
Etc.
Samsung Electronics
Address No.1 Outdoor Unit- 60Hz (Other Outdoor Unit COMP OFF)
Whole Operation (The set temperature=3°C)
Operation side : 2000 Step , Stop side : 2000 step
Does not conduct the operation of the special operation, and protection control.
Pressure and temperature is outside normal limits :
Operation is shut down after gas pipe manually closed.
K1 Tact Switch 7 times~10 times
Open all valves of the outdoor unit
If not turn off the vacuum mode, the start of normal operation is prohibited.
K2 Tact Switch 3 times
OFF (Cooling Mode)
Maximum air flow
30 minutes
K1 Tact Switch 11 times
OFF
OFF
OFF
Open all valves of the system
(Including indoor unit and mcu)
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