86
MUL
TI V 5 Outdoor Unit Service Manual
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.
OTHER CONTROLS
Setting Optional Modes
Turn No. 5 on the master outdoor unit PCB
DIP switch bank SW01 to ON.
6HOHFWWKH³6YF´PRGHE\XVLQJWKH6:&IRUZDUGŹEXWWRQDQGWKH
6:&EDFNZDUGŻEXWWRQDQGWKHQSUHVVWKH6:&FRQILUP
ƔEXWWRQ
6HOHFWWKH³6(´IXQFWLRQE\XVLQJWKH6:&IRUZDUGŹEXWWRQDQG
WKH6:&EDFNZDUGŻEXWWRQDQGWKHQSUHVVWKH6:&
FRQILUPƔEXWWRQ
6HOHFWIURP³R))´RU³RQ´E\XVLQJWKH6:&IRUZDUGŹEXWWRQDQG
WKH6:&EDFNZDUGŻEXWWRQDQGWKHQSUHVVWKH6:&
FRQILUPƔEXWWRQ
Figure 38: Setting the Level Change of Error Code CH200 Function.
Press the SW01D Reset Button one (1) time to reset PCB.
The Level Change of Error Code CH200 function begins.
Settings
Function
oFF (Default)
Level Change of Error Code CH200 is Not Enabled.
Level 1 / Outdoor Unit Shutdown and Manual Restart
Required.
on
Level Change of Error Code CH200 is Enabled.
Level 3 / Outdoor Unit Continues Operation and
CH200 Error Code is Displayed
Table 48: Setting the Level Change of Error Code CH200 Function.
Level Change of Error Code CH200 (SE14)
Error code CH200 is an “Auto pipe search failure - Failure to find an indoor unit,” and displays on all zone controllers, central controllers, and
BACnet and LonWorks gateways. After auto operation, Error Code CH200 will display if the number of the indoor units detected is different
from the number of communicating indoor units. The response to Error Code CH200 is usually a Level 1 type, which will shut down the
outdoor unit(s). The Level Change of Error Code CH200 function will change the Level 1 response to a Level 3, which allows the system to
operate instead of automatically shutting down. The system shuts down with an Error Code CH200 if there is one (1) or more indoor unit(s)
that have no power and the possibility exists that an electronic expansion valve is open, or if liquid could return to the compressor. Apply this
function only after confirming that all indoor units without power (or indoor units that cannot establish communication with the outdoor unit)
have expansion valves in the closed position.
Use in applications where the LG-trained service technician wants to restart a system for diagnostic purposes, or to operate the system for
an extended period with no power to one (1) or more indoor units. The system can operate safely without damage to the compressor if:
• The indoor unit(s) currently without power / communication was (were) turned off using the on / off button;
• The last operating mode for the indoor unit(s) currently without power / communication was (were) Fan Only (thermal off);
• The LG-trained service technician confirmed the expansion valve for the indoor unit(s) currently without power / communication was (were)
was closed using LGMV;
• The space temperature was well above / below the setpoint, and the indoor unit(s) currently without power / communication was (were) not
calling for heating or cooling (thermal off condition was confirmed);
or;
• Isolation valves on both the liquid and vapor piping are closed.
The error code cannot be removed until the malfunction is fixed, a successful auto pipe search function is complete, and the outdoor unit
PCB is reset using the SW01D Reset Button.
For use on heat recovery systems only.
When this function is enabled (Level 3), the LG-trained service tech-
nician must not leave the system unmonitored without re-establishing
power and communication to all indoor units, or locking out all indoor
units that are not properly communicating with the outdoor unit. Leaving
the outdoor unit operating with CH200 unresolved creates a potential for
compressor slugging (and eventual damage) if the error code was due
to indoor unit power loss.
During initial system commissioning (or re-commissioning) Error No.
&+3LSH'HWHFWLRQ(UURU±IDLOXUHWR¿QGLQGRRUXQLW´E\GHIDXOW
FDOOVIRUDQLPPHGLDWHVKXWGRZQZLWKRXW¿UVWSHUIRUPLQJDQ\DXWRUHVWDUW
attempts. For more information on CH200, see the Troubleshooting
section.
