LG Multi V5 Service Manual

200
MULTI V 5 Outdoor Unit Service Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. Description Details Causes
&1RRI
Heat Recovery Unit
Capacity of indoor
units connected to
the heat recovery
unit exceeds
allowable limits.
Total capacity of indoor unit(s)
connected to each heat recovery
unit port exceeds allowable limits.
Error code displays on the outdoor
unit SSD, the heat recovery unit
SSD, or in LGMV.
After auto-pipe detection is complete, wait 5 minutes, then
verify connected capacity. System will display error if:
• The heat recovery unit port addresses are all unique,
then >54 Mbh single indoor unit connected; >54 Mbh total
of multiple indoor units connected.
• If 2 heat recovery unit port addresses are the same and
the ports are twinned; >108 Mbh total of multiple indoor
units are connected.
• If 3 heat recovery unit port addresses are the same and
the ports are all connected, >162 Mbh total of multiple
indoor units connected.
• If the total connected indoor unit nominal capacity ex-
ceeds 192 Mbh for a single heat recovery unit.
1. Communication cable or piping is not connected prop-
erly.
2. Heat recovery PCB DIP switch is not set correctly.
3. The indoor unit connected on the heat recovery unit port
exceeds the allowable capacity limit.
1. Check if the communication cable and piping between the heat recovery unit(s) and the indoor unit(s) installed correctly.
2. Check if the DIP switches are set correctly for each connection condition between the heat recovery unit(s) and the indoor unit(s).
3. ,IWKHLQGRRUXQLWFRQQHFWHGWRWKHKHDWUHFRYHU\XQLW,6LQDJURXSFRQWURODSSOLFDWLRQFKHFNLIWKHFRUUHVSRQGLQJFDSDFLW\LVN%WX
4. ,IWKHLQGRRUXQLWFRQQHFWHGWRWKHKHDWUHFRYHU\XQLW,6127LQDJURXSFRQWURODSSOLFDWLRQFKHFNLIWKHFRUUHVSRQGLQJFDSDFLW\LV
kBtu (including zoning control).
5. If the error occurs again even after following Steps 1 through 4 above, replace the corresponding heat recovery unit PCB.
6. When Steps 1 through 4 (or Steps 1 through 5 if the heat recovery unit PCB needs to be replaced) are completed successfully, perform
the auto addressing and piping detection procedures.
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1. If viewed from the master outdoor units SSD: The display shows “51c” where “c” is the heat recovery unit count number of the overcon-
nected device assigned by auto-pipe detect.
2. If viewed from the heat recovery unit PCB board display that is overconnected: The display will show “CH51”.
3. If viewed from an heat recovery unit that is not overconnected: The display will show nothing.
4. If viewed from any indoor unit zone controller: Nothing will be displayed.
5. If viewed from LGMV maintenance software on a PC: The screen will show CH51h where “h” is the heat exchanger address of the over-
connected heat recovery unit.

LG Multi V5 Specifications

General

Compressor Type	Inverter Scroll
Refrigerant	R410A
Energy Efficiency	High
Heat Recovery	Available
Smart Diagnosis	Yes
Type	VRF (Variable Refrigerant Flow)
Control	Centralized Control
Power Supply	380-415V / 3Ph / 50Hz