Install Instructions

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Multi F Ceiling Cassette Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
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ELECTRICAL WIRING
LG SIMS - Self Diagnosis Functions
LG SIMs
WLAN Module
LG SIMs App
on Smart Phone
The SIMs WLAN module and the smart phone app together provide monitoring and trouble-
shooting capability for LG Duct Free Systems. SIMs functions only with LG Duct Free products
(Figure 63).
SIMs can display and graph operational data for the air conditioner system including the indoor
unit and the outdoor unit. SIMs also displays error codes and a troubleshooting guide. A full
copy of the LG SIMs Smart Inverter Monitoring System User’s Manual is available on the www.
lghvac.com website.
To use SIMs you must be a trained HVAC service technician familiar with variable refrigerant
flow (VRF) systems in general and with LG’s Duct Free System products. You should under-
stand the inverter air conditioning operation cycle, the meaning of the data displayed by SIMs,
and how to use the data to troubleshoot the system.
Figure 64 shows a typical Multi F configuration used with the SIMs module and app.
Note:
• The Duct Free System air conditioning system must run for
at least 15–20 minutes before data collected by SIMs 2.0 is
valid for troubleshooting.
• You must have the free SIMs app correctly installed on your
smart phone before using SIMs.
• Some ODUs have an LGMV extension cable accessed by
removing the side handle cover. If the ODU does not have
this extension cable, access the LGMV connector by remov-
ing the top cover of the ODU.
High voltages capable of causing death are used in
this equipment. Outdoor unit power remains connected
during this procedure. Take extreme caution not to
touch electrical components or connections. Failure to
observe this warning can result in death or severe injury.
Figure 63: LG SIMs App and WLAN Module
Figure 64: SIMs WLAN Module to a Typical Multi F System.
Figure 65: SIMs App Main Info Screen
The main screen (Figure 65) is the first screen displayed after wireless
connection is established. Tap the Main Info tab to display current read-
ings regarding your indoor and outdoor unit(s). The Operational Info area
of the screen will show active functions or modes by illuminating the light
to the right of the function.
Additional Help information can be accessed by tapping the Help Menu
buttons at the bottom of this screen.
Operational
Information
AC Cycle
Information on
Main Info Tab
Help Menu
(File is Factory Use Only)
SIMs App Main Info Screen