LMN248HVT Installation Guide

44
Multi F Standard Wall-Mounted Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
MA
X
MUL
TI
F
MUL
TI
F
ELECTRICAL WIRING
Additional screens can be accessed by tabs on the main screen.
Additional screens include the following:
1. Cycleview (Figure 63): Graphic of internal components including:
• Compressors showing actual speeds
• EEVs
• IDUs
• Temperature and pressure sensors
• Four-way reversing valve
2. Graph: Full screen graph of actual high and low pressures and high
and low pressure limits. A sliding bar enables user to go back in
time and view data.
3. Control FTN: Enables user to turn on IDUs in 1.8°F increments.
4. Useful Tab
• Unit Conversion: Converts metric values to imperial values.
• Actual inverter compressor speed
• Target inverter compressor speed
• Actual outdoor fan speed
• Target outdoor unit fan speed
• Actual superheat
• Target superheat
• Actual subcooler circuit superheat
• Target subcooler circuit superheat
• Main EEV position
• Subcooling EEV position
• Inverter compressor current transducer
value
• Outdoor air temperature
• Actual high pressure/saturation
temperature
• Actual low pressure/saturation
temperature
• Suction temperature
• Inverter compressor discharge
temperature
• Front outdoor coil pipe temperature
• Back outdoor coil pipe temperature
• Liquid line pipe temperature
• Subcooler inlet temperature
• Subcooler outlet temperature
• Average indoor
unit (IDU) pipe
temperature
• Inverter compres-
sor operation
indicator light
• Liquid injection
valves’ operation
indicator lights
• Hot gas bypass
valve operation
indicator light
• Four-way
reversing valve
operation
indicator light
• Pressure graph showing actual low
pressure and high pressure levels
• Error code display
• Operating mode indicator
• Target high pressure
• Target low pressure
• Printed circuit board (PCB) version
• Software version
• Installer name
• Model number of IDUs
• Site name
• Total number of connected IDUs
• Communication indicators
• IDU capacity
• IDU operating mode
• IDU fan speed
• IDU EEV position
• IDU room temperature
• IDU inlet pipe temperature
• IDU outlet pipe temperature
• IDU error code
LG Monitoring View (LGMV) Diagnostic Software
LGMV software (PRCTSL1 and PRCTFE1) allows the service technician or commissioning agent to connect a computer USB port to the
outdoor unit’s main printed circuit board (PCB) using an accessory cable. The monitoring screen for LGMV allows the user to view the
following real time data on one screen (Figure 62):
Figure 62: MV Real-time Data Screen
Figure 63: MV Cycleview
Note:
Images on these pages are examples of LGMV screenshots. Actual images
may differ depending on the version of the software and the unit installed.
Self Diagnosis Functions