LG Multi V Water IV - Error Code Tables: Water Source Unit Errors (Part 1); Water Source Unit Error Codes (Section 1)

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Error Codes
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ERROR CODE TABLES
Table 76: Water Source Unit Error Codes.
Error Code
Description Possible Cause
Number
WSU
Frame
2 0 0 1 Searching pipe error Automatic valve addressing failure
2 1 – 1
Master WSU inverter compressor Intelligent Power
Module (IPM) error
Master WSU inverter compressor drive IPM fault
2 1 – 2 Slave 1 WSU inverter compressor IPM fault Slave 1 WSU inverter compressor drive IPM fault
2 1 – 3 Slave 2 WSU inverter compressor IPM fault Slave 2 WSU inverter compressor drive IPM fault
2 2 – 1
Master WSU inverter board input over current
(RMS)
Master WSU inverter board input current too high (RMS)
2 2 – 2
Slave 1 WSU inverter board input over current
(RMS)
Slave 1 WSU inverter board input current too high (RMS)
2 2 – 3
Slave 2 WSU inverter board input over current
(RMS)
Slave 2 WSU inverter board input current too high (RMS)
2 3 – 1
Master WSU inverter compressor DC link
under-voltage
Master WSU DC voltage is not charged after Master WSU operating relay
is turned on
2 3 – 2
Slave 1 WSU inverter compressor DC link
under-voltage
Slave 1 WSU DC voltage is not charged after Slave 1 WSU operating
relay is turned on
2 3 – 3
Slave 2 WSU inverter compressor DC link
under-voltage
Slave 2 WSU DC voltage is not charged after Slave 2 WSU operating
relay is turned on
2 4 – 1 High pressure switch
• Compressor maintenance by Master WSU high pressure switch
• Flow rate insufcient or Master WSU ow switch failure
2 4 – 2 High pressure switch
• Compressor maintenance by Slave 1 WSU high pressure switch
• Flow rate insufcient or Slave 1 WSU ow switch failure
2 4 – 3 High pressure switch
• Compressor maintenance by Master WSU high pressure switch
• Flow rate insufcient or Slave 2 WSU ow switch failure
2 5 – 1 Master WSU input power voltage level high/low Master WSU input power over or under voltage
2 5 – 2 Slave 1 WSU input power voltage level high/low Slave 1 WSU input power over or under voltage
2 5 – 3 Slave 2 WSU input power voltage level high/low Slave 2 WSU input power over or under voltage
2 6 – 1 Master WSU inverter compressor operation failure Initial operation failure due to Master WSU inverter compressor error
2 6 – 2 Slave 1 WSU inverter compressor operation failure Initial operation failure due to Slave 1 WSU inverter compressor error
2 6 – 3 Slave 2 WSU inverter compressor operation failure Initial operation failure due to Slave 2 WSU inverter compressor error
2 8 – 1 Master WSU inverter DC link over voltage error Inverter compressor off due to Master WSU inverter DC voltage too high
2 8 – 2 Slave 1 WSU inverter DC link over voltage error Inverter compressor off due to Slave 1 WSU inverter DC voltage too high
2 8 – 3 Slave 2 WSU inverter DC link over voltage error Inverter compressor off due to Slave 2 WSU inverter DC voltage too high
2 9 – 1 Master WSU inverter compressor over-current
Master WSU inverter compressor error or operating component (IPM)
error operation
2 9 – 2 Slave 1 WSU inverter compressor over-current
Slave 1 WSU inverter compressor error or operating component (IPM)
error operation
2 9 – 3 Slave 2 WSU inverter compressor over-current
Slave 2 WSU inverter compressor error or operating component (IPM)
error operation