119
Error Codes
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Error Code Description Possible Cause
4 3 – 3 Slave 2 WSU over-voltage sensor error Slave 2 WSU over-voltage sensor disconnection or short circuit
4 4 – 1 Master WSU air temperature sensor error Master WSU air temperature sensor disconnection or short circuit
4 4 – 2 Slave 1 WSU air temperature sensor error Slave 1 WSU air temperature sensor disconnection or short circuit
4 4 – 3 Slave 2 WSU air temperature sensor error Slave 2 WSU air temperature sensor disconnection or short circuit
4 5 – 1
Master WSU heat exchanger temperature
sensor (A) fault
Master WSU heat exchanger temperature sensor (A) open or short
4 5 – 2
Slave 1 WSU heat exchanger temperature
sensor (A) fault
Slave 1 WSU heat exchanger temperature sensor (A) open or short
4 5 – 3
Slave 2 WSU heat exchanger temperature
sensor (A) fault
Slave 2 WSU heat exchanger temperature sensor (A) open or short
4 6 – 1 Master WSU suction temperature sensor error Master WSU suction temperature sensor disconnection or short circuit
4 6 – 2 Slave 1 WSU suction temperature sensor error Slave 1 WSU suction temperature sensor disconnection or short circuit
4 6 – 3 Slave 2 WSU suction temperature sensor error Slave 2 WSU suction temperature sensor disconnection or short circuit
4 9 – 1 Master WSU IPM temperature sensor error Master WSU IPM temperature sensor disconnection or short circuit
4 9 – 2 Slave 1 WSU IPM temperature sensor error Slave 1 WSU IPM temperature sensor disconnection or short circuit
4 9 – 3 Slave 2 WSU IPM temperature sensor error Slave 2 WSU IPM temperature sensor disconnection or short circuit
5 0 – 1 Master WSU input power phase loss Master WSU has lost one of the phases of the three-phase power input
5 0 – 2 Slave 1 WSU input power phase loss Slave 1 WSU has lost one of the phases of the three-phase power input
5 0 – 3 Slave 2 WSU input power phase loss Slave 2 WSU has lost one of the phases of the three-phase power input
5 1 – 1
Over-capacity (Indoor unit capacity sum is
excessive) connection
Excessive connection of indoor unit connection (combination ratio is
exceeded)
5 2 – 1 Master WSU inverter controller communication error
Inverter controller signal is not received from the Master WSU inverter
controller
5 2 – 2
Slave 1 WSU inverter controller communication
error
Inverter controller signal is not received from the Slave 1 WSU inverter
controller
5 2 – 3
Slave 2 WSU inverter controller communication
error
Inverter controller signal is not received from the Slave 2 WSU inverter
controller
5 3 – 1
Communication error between WSU controller and
indoor unit
Indoor unit control signal is not received from the WSU inverter controller
5 7 – 1 Master WSU inverter controller communication error Inverter controller signal not received by Master WSU controller
5 7 – 2
Slave 1 WSU inverter controller communication
error
Inverter controller signal not received by Slave 1 WSU controller
5 7 – 3
Slave 2 WSU inverter controller communication
error
Inverter controller signal not received by Slave 2 WSU controller
5 9 – 1 Series connection error Connection error between WSUs
6 0 – 1 Master WSU inverter PCB EEPROM error Master WSU inverter PCB EEPROM ACCESS error
6 0 – 2 Slave 1 WSU inverter PCB EEPROM error Slave 1 WSU inverter PCB EEPROM ACCESS error
6 0 – 3 Slave 2 WSU inverter PCB EEPROM error Slave 2 WSU inverter PCB EEPROM ACCESS error
Table 76: Water Source Unirt Error Codes - continued
ERROR CODE TABLES
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