LG ARUM072BTE5 Installation Manual page 168

ERROR CODE TABLES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Table 81: Error Codes, continued.
Error Code
C +
Capacity of indoor units connected to the heat
No.
- 5 1
of HR
recovery unit exceeds allowable limits.
Unit
2 0 0 1 Auto pipe search failure.
Heat recovery unit liquid sensor error. (C = Heat
2 0 1 recovery unit + Heat recovery unit
number).
Heat recovery unit subcooling pipe inlet sensor
2 0 2 error. (C = Heat recovery unit + Heat recovery unit
number).
Heat recovery unit subcooling pipe outlet sensor
2 0 3 error. (C = Heat recovery unit + Heat recovery unit
number).
Communication error between outdoor unit and
2 0 4 heat recovery unit. (C = Heat recovery unit + Heat
C +
recovery unit number)
No.
Communication error between heat recovery unit
of HR
(2A Series) and the 485 modem. The 2A Series heat
Unit
recovery unit applies only to heat recovery systems
2 0 5
communicating at a baud rate of 9,600 bps.
• The 485 modem is the communications style on
the bus that is 1e outdoor unit to many indoor units.
Duplicate address error of the heat recovery unit
(2A Series).
• The 2A Series heat recovery unit applies only to
2 0 6 heat recovery systems communicating at a baud
rate of 9,600 bps.
• The 485 modem is the communications style on the
bus that is 1e outdoor unit to many indoor units.
2 4 2 * Network error of central controller.
For detailed information on how to troubleshoot each error, see the Multi V Service Manual on www.lghvac.com.
168
Description
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Details
The amount of nominal cooling capacity of indoor units con-
nected to a heat recovery unit, or a heat recovery unit port, or
capacity of grouped heat recovery unit port is excessive. 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, but >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, or >162 Mbh total of multiple indoor
units connected.
• If the total connected indoor unit nominal capacity exceeds
192 Mbh for a single heat recovery unit.
• Error code displays on the outdoor unit SSD, the heat recov-
ery unit SSD, or in LGMV.
Auto piping procedure did not complete properly.
Disconnection or short circuit of heat recovery unit liquid pipe
sensor.
Disconnection or short circuit of heat recovery unit subcooling
pipe inlet sensor.
Disconnection or short circuit of heat recovery unit subcooling
pipe outlet sensor.
Outdoor unit does not receive signal from heat recovery unit.
• Communication problem occurred between the heat recovery
unit PCB and the connection to the communications bus.
• Error displays if the outdoor unit signal is not received for
three (3) minutes. The error clears after the signal is received
from the modem. (2A Series Heat Recovery Units.)
• A heat recovery unit address is duplicated for 485 communi-
cation.
• There are two heat recovery units with one or more HEX
addresses that are the same.
• Adjust the hex address dial found on the heat recovery units.
Inability of the central controller to receive information from the
outdoor unit.