Error Code Tables - LG Multi V Water IV Installation Manual

ERROR CODE TABLES

Error Codes
• Error codes are displayed on the LED of indoor units, wired
remote controllers, LED on the water source unit control board,
and LG Monitoring View (LGMV) Diagnostic Software.
• Indicate different types of unit failures, assists in self-diagnosis
and to track the frequency of occurrence.
• If two or more errors occur simultaneously, the lower error code
number is displayed first.
• After error is resolved, the error code does not display.
Indoor Unit Error Codes
Refer to Table 75 for a list of IDU error codes, descriptions of the
codes, and possible causes. IDU error codes are two-digit numbers.
Water Source Unit Error Code Display
Refer to Table 76 for a list of WSU error codes, descriptions of the
codes, and possible causes. WSU error codes are three or four digit
numbers.
Note:
For detailed information on how to troubleshoot each error, see the
Water Source Unit Service Manual on www.lghvac.com.
Table 75: Indoor Unit Error Codes.
Error Code
0 1 – – Indoor unit air temperature sensor error
0 2 – – Inlet pipe temperature sensor of indoor unit
Communication error between wired remote controller
0 3 – –
and indoor unit
0 4 – – Indoor unit drain error
0 5 – – Communication error between WSU and indoor unit
0 6 – – Indoor unit pipe outlet temperature sensor error
0 8 – – Hot water tank temperature sensor error
0 9 – – Indoor unit EEPROM error
1 0 – – Indoor unit BLDC motor feedback signal error
1 4 – – Hydro kit water flow switch error
1 5 – – Hot water tank over temperature error
1 6 – – Hydro kit water pipe temperature sensor error
1 7 – – Hydro kit water pipe inlet temperature sensor error
1 8 – – Hydro kit water pipe outlet temperature sensor error
116
Description
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The first two or three numbers identify the error code. The fourth
digit identifies the WSU frame that has the error. The fourth digit will
be 1, 2, or 3 to identify which WSU unit has the error:
1 = Master WSU (or the only WSU in a single-frame system)
2 = Slave 1 WSU (in a two or three frame system)
3 = Slave 2 WSU (in a three frame system)
Example: is error 26 on the slave 1 WSU. The dash indicates
26–2
no digit displayed in the third LED position.
Error Code Nomenclature Definitions
• MICOM: Non-volatile memory chip where unit setup information
is stored.
• EPROM: Non-volatile memory chip where device identification,
size, and factory defined default component operating
parameters are stored.
Possible Cause
Indoor unit air temperature sensor disconnection or short circuit
Indoor unit pipe inlet temperature sensor disconnection or short circuit
Occurs when indoor unit communication signal is not received from
the wired remote controller
Drain pump and float switch error
When the indoor unit does not receive the outside communication
signal continuously for 5 minutes or more
Indoor unit pipe outlet temperature sensor disconnection or short
circuit
Hot water tank temperature sensor disconnection or short circuit
Communication error between MICOM and EEPROM or when there is
no indoor unit EEPROM data
When motor connector is removed or defective
Hydro kit water flow switch detect error
Hot water tank temperature sensor error or over temperature water
detect
Hydro kit water pipe temperature sensor disconnection or short circuit
Hydro kit water pipe temperature sensor disconnection or short circuit
Hydro kit water pipe temperature sensor disconnection or short circuit