Vacuum Mode (Se3, Vacc) - LG Multi V5 Service Manual

OTHER CONTROLS
Setting Optional Modes

Vacuum Mode (SE3, vAcc)

The vacuum mode can be used as an option for creating vacuum in
the system when the outdoor unit is first installed, if power is avail-
able, and if the system has already been auto addressed. Vacuum
mode enables the system to fully open all valves, and can help
speed up the evacuation process.
Vacuum mode can also be used when compressor and / or outdoor
unit parts are replaced, or when an indoor unit is added or replaced.
1. Turn No. 5 on the master outdoor unit PCB DIP Switch SW01 to
ON.
2.
3.
4. Press the SW01D Reset Button one (1) time to reset PCB, and
start the vacuum mode "vACC". In vacuum mode, the outdoor
unit valve is open, the outdoor unit EEV is open, and the indoor
unit(s) EEV(s) is/are open. The heat recovery unit(s) valve(s) and
EEVs are open (if system includes heat recovery units).
5. To cancel the vacuum mode, turn No. 5 on the master outdoor
unit PCB DIP Switch SW01 to OFF, and push the SW01D reset
button on the outdoor unit PCB. On a multi-frame system, push
the SW01D reset button on ALL outdoor units.
Setting Vacuum Mode
Turn Master Outdoor Unit PCB No. 5 DIP Switch to ON.
Start the Vacuum Mode "vACC."
• Outdoor Unit Valve is Fully Open.
• Outdoor Unit EEV is Fully Open.
• Indoor Unit(s) EEV(s) is/are Fully Open.
• Heat Recovery Unit(s) Valves and EEVs are
Fully Open.
80
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Figure 30: Vacuum Mode Setting Locations.
No. 5 on DIP-SW01
ON
OFF
1 2 3 4 5 6 7
Canceling Vacuum Mode
Turn on Master Outdoor Unit.
<AND>
Push the Reset Button on the Outdoor Unit PCB. On a Multi-
Frame System, Push the Reset Button on ALL Outdoor Units.
• Outdoor unit operation stops during Vacuum Mode, so the com-
pressor cannot operate.
• Limit vacuum mode to less than 48 hours of continuous operation.
If vacuum mode is not stopped, the system will continue to operate
with all EEVs and valves open on the non-vacuum mode termi-
nated slave outdoor units. The refrigerant will flood back to the
compressors on those non-vacuum mode terminated slave outdoor
units, which will result in poor operation, equipment malfunction
and / or compressor damage.
No. 5 on DIP-SW01
SSD
SW03C (
SW02C (
SW01C (