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14
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Disposal
14.3 To start and stop forced cooling
14.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch
14.3.2 To start and stop forced cooling using the indoor unit user interface
Installer reference guide
60
NOTICE
During pump down operation, stop the compressor before removing the refrigerant
piping. If the compressor is still running and the stop valve is open during pump
down, air will be sucked into the system. Compressor breakdown or damage to the
system can result due to abnormal pressure in the refrigerant cycle.
Pump down operation will extract all refrigerant from the system into the outdoor
unit.
1 Remove the valve cap from the liquid stop valve and the gas stop valve.
2 Carry out forced cooling. See
3 After 5 to 10 minutes (after only 1 or 2 minutes in case of very low ambient
temperatures (<−10°C)), close the liquid stop valve with a hexagonal wrench.
4 Check on the manifold if the vacuum is reached.
5 After 2-3 minutes, close the gas stop valve and stop forced cooling.
c
e
a
a Gas stop valve
b Closing direction
c Hexagonal wrench
d Valve cap
e Liquid stop valve
There are 2 methods to perform forced cooling.
▪
Method 1. Using the indoor unit ON/OFF switch (if present on the indoor unit).
▪
Method 2. Using the indoor unit user interface.
1 Press the ON/OFF switch for at least 5 seconds.
Result: Operation will start.
INFORMATION
Forced cooling stops automatically after 15 minutes.
2 To stop operation sooner, press the ON/OFF switch.
1 Set the operation mode to cooling. Refer to "To perform a test run" in the
installation manual of the indoor unit.
"14.3 To start and stop forced
b
d
d
4
cooling" [
60].
R32 split series
4P751614-2 – 2023.09
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