Error No. 2001 - LG Multi V5 Service Manual

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.
Error No. Description
Auto pipe search
failure.
2001
1. See if the green communication LED of the heat recovery unit is blinking.
2. If the green communication LED of the heat recovery unit is consistently blinking:
• Check the input power of the heat recovery unit.
•
perform the auto addressing procedure.
• While the power to the heat recovery unit is on, check if error code "CH05" is displayed (see troubleshooting instructions for Error No.
CH05).
3. If the green communication LED of the heat recovery unit is still consistently blinking, check the rotary switch and DIP switch settings.
perform the auto addressing procedure.
4. If the number of indoor units is different than what is actually installed and what number is displayed after the auto addressing procedure
5. If an indoor unit has not been connected to the first port (No. 1 Valve) of the heat recovery unit, set the heat recovery unit piping
manually.
Outdoor Unit Functions section.
Error No. 51 C
Details
After auto operation, the number of the indoor
units detected is different from the number of
communicating indoor units.
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES

Error No. 2001

Causes
1. Power wiring or the communications cable
to the heat recovery unit is defective.
2. After auto addressing, indoor unit has the
wrong address (defective indoor unit PCB
and / or power wiring / communications
cable).
3. Heat recovery unit rotary or DIP switch
setting(s) is (are) wrong.
4. Heat recovery unit PCB is defective.
201