135
Error Codes
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.
Error Code Description Details
Heat Recovery Unit
-51
&
No.
of
HR
Unit
Capacity of indoor units connected to the heat
recovery unit exceeds allowable limits.
The amount of nominal cooling capacity of indoor units con-
nected to a heat recovery unit, or a heat recovery unit port, or
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, 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 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.
2 0 0 1 Auto pipe search failure. Auto piping procedure did not complete properly.
201
&
No.
of HR
Unit
Heat recovery unit liquid sensor error. (C = Heat
UHFRYHU\XQLW+HDWUHFRYHU\XQLW
number).
Disconnection or short circuit of heat recovery unit liquid pipe
sensor.
202
Heat recovery unit subcooling pipe inlet sensor
HUURU& +HDWUHFRYHU\XQLW+HDWUHFRYHU\XQLW
number).
Disconnection or short circuit of heat recovery unit subcooling
pipe inlet sensor.
203
Heat recovery unit subcooling pipe outlet sensor
HUURU& +HDWUHFRYHU\XQLW+HDWUHFRYHU\XQLW
number).
Disconnection or short circuit of heat recovery unit subcooling
pipe outlet sensor.
204
Communication error between outdoor unit and
KHDWUHFRYHU\XQLW& +HDWUHFRYHU\XQLW+HDW
recovery unit number)
Outdoor unit does not receive signal from heat recovery unit.
205
Communication error between heat recovery unit
(2A Series) and the 485 modem. The 2A Series heat
recovery unit applies only to heat recovery systems
communicating at a baud rate of 9,600 bps.
• The 485 modem is the communications style on
the bus that is an outdoor unit to many indoor units.
• Communication problem occurred between the heat recovery
unit PCB and the connection to the communications bus (the
heat recovery unit 485 modem).
• 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.)
206
Duplicate address error of the heat recovery unit
(2A Series).
• The 2A Series heat recovery unit applies only to
heat recovery systems communicating at a baud
rate of 9,600 bps.
• The 485 modem is the communications style on the
bus that is an outdoor unit to many indoor 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.
Network
2 4 2 * Network error of central controller.
Inability of the central controller to receive information from the
outdoor unit.
ERROR CODE TABLES
Table 77: Error Codes, continued.
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
To Next Page
Loading...
Need help?
General
