LG ARUM072BTE5 Installation Manual page 167

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 80: Error Codes, continued.
Error Code
Master outdoor unit upper heat exchanger temperature
1 5 3 1
sensor error.
1 5 3 2 Slave1 outdoor unit upper heat exchanger temperature
sensor error.
Slave2 outdoor unit upper heat exchanger temperature
1 5 3 3
sensor error.
Master outdoor unit lower heat exchanger temperature
1 5 4 1
sensor error.
Slave1 outdoor unit lower heat exchanger temperature
1 5 4 2
sensor error.
Slave2 outdoor unit lower heat exchanger temperature
1 5 4 3
sensor error.
Communication error between master outdoor unit
1 8 2 1
external board main and sub MICOMs.
Communication error between slave1 outdoor unit
1 8 2 2
external board main and sub MICOMs.
Communication error between slave2 outdoor unit
1 8 2 3
external board main and sub MICOMs.
Hydro kit P, HEX error (P equals prevents from freez-
1 8 7 1
ing).
Excessive increase in master outdoor unit fan heatsink
1 9 3 1
temperature.
1 9 3 2 Excessive increase in slave1 outdoor unit fan heatsink
temperature.
Excessive increase in slave2 outdoor unit fan heatsink
1 9 3 3
temperature.
1 9 4 1 Master outdoor unit fan heatsink temperature
sensor error.
Slave1 outdoor unit fan heatsink temperature
1 9 4 2
sensor error.
Slave2 outdoor unit fan heatsink temperature
1 9 4 3
sensor error.
For detailed information on how to troubleshoot each error, see the Multi V Service Manual on www.lghvac.com.
Description
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODE TABLES
Details
• Check the connection on the outdoor unit PCB.
• Thermistor is disconnected or shorted.
• Check the connection on the outdoor unit PCB.
• Thermistor disconnected or shorted.
Master outdoor unit external board main to sub MICOMs
communication failure.
Slave1 outdoor unit external board main to sub MICOMs
communication failure.
Slave2 outdoor unit external board main to sub MICOMs
communication failure.
• Water outlet temperature sensor is disconnected or shorted.
Values read less than -43°C or greater than +96°C (less than
-45.4°F or greater than +204.8°F).
• Prevents HEX from bursting when operating. Does not protect
HEX if the glycol is inadequate, nor if the hydro kit is off and
not operating.
Outdoor unit compressor ramps up, and hydro kit operates. One
(1) minute later, pipe temperature at mid-temperature hot water
supply (inlet or outlet water) is <0°C (32°F), and mid-tempera-
ture hot water supply (inlet or outlet water) is ≤4°C (39.2°F) for
ten (10) seconds.
System has shut off because master outdoor unit fan heatsink
temperature is >203°F.
System has shut off because slave1 outdoor unit fan heatsink
temperature is >203°F.
System has shut off because slave1 outdoor unit fan heatsink
temperature is >203°F.
Disconnection or short circuit of master outdoor unit fan heat-
sink temperature sensor.
Disconnection or short circuit of slave1 outdoor unit fan heatsink
temperature sensor.
Disconnection or short circuit of slave2 outdoor unit fan heatsink
temperature sensor.
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