Error No. 205 C - LG Multi V5 Service Manual

ERROR CODES

Error No. 205 C

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
Communication
error between
heat recovery
unit and the 485
Heat Recovery Unit
modem (2A Series
Heat Recovery
Units).
1. Check the communication cable connection between the heat recovery unit (2A Series) and the 485 modem. Check if the red LED is on.
2. If the red LED on the 485 modem is on, reset the outdoor unit and the power of the heat recovery unit.
3. If the red LED on the 485 modem is flashing, replace the 485 modem.
4. If the red LED on the 485 modem still flashes even after it is replaced, replace the heat recovery unit PCB.
204
Details
Communication error occurred between the
heat recovery unit and the 485 modem (2A
Series Heat Recovery Units).
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 1e outdoor unit to many indoor
units.
Due to our policy of continuous product innovation, some specifications may change without notification.
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Causes
1. Communication problem occurred between
the heat recovery unit PCB and the connec-
tion to the communications bus (the heat
recovery unit 485 modem).
2. 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.)
3. Incorrect wiring between the heat recovery
unit and the 485 modem.
4. The 485 PCB modem is defective.
5. The heat recovery unit PCB is defective.