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Table 76: Water Source Unit Error Codes.
Error Code
Number WSU
Frame
2 0 0
1
Searching pipe error
Master WSU inverter compressor Intelligent Power
2 1 –
1
Module (IPM) error
2 1 –
2
Slave 1 WSU inverter compressor IPM fault
2 1 –
3
Slave 2 WSU inverter compressor IPM fault
Master WSU inverter board input over current
2 2 –
1
(RMS)
Slave 1 WSU inverter board input over current
2 2 –
2
(RMS)
Slave 2 WSU inverter board input over current
2 2 –
3
(RMS)
Master WSU inverter compressor DC link
2 3 –
1
under-voltage
Slave 1 WSU inverter compressor DC link
2 3 –
2
under-voltage
Slave 2 WSU inverter compressor DC link
2 3 –
3
under-voltage
2 4 –
1
High pressure switch
2 4 –
2
High pressure switch
2 4 –
3
High pressure switch
2 5 –
1
Master WSU input power voltage level high/low
2 5 –
2
Slave 1 WSU input power voltage level high/low
2 5 –
3
Slave 2 WSU input power voltage level high/low
2 6 –
1
Master WSU inverter compressor operation failure
2 6 –
2
Slave 1 WSU inverter compressor operation failure
2 6 –
3
Slave 2 WSU inverter compressor operation failure
2 8 –
1
Master WSU inverter DC link over voltage error
2 8 –
2
Slave 1 WSU inverter DC link over voltage error
2 8 –
3
Slave 2 WSU inverter DC link over voltage error
2 9 –
1
Master WSU inverter compressor over-current
2 9 –
2
Slave 1 WSU inverter compressor over-current
2 9 –
3
Slave 2 WSU inverter compressor over-current
Description
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODE TABLES
Possible Cause
Automatic valve addressing failure
Master WSU inverter compressor drive IPM fault
Slave 1 WSU inverter compressor drive IPM fault
Slave 2 WSU inverter compressor drive IPM fault
Master WSU inverter board input current too high (RMS)
Slave 1 WSU inverter board input current too high (RMS)
Slave 2 WSU inverter board input current too high (RMS)
Master WSU DC voltage is not charged after Master WSU operating relay
is turned on
Slave 1 WSU DC voltage is not charged after Slave 1 WSU operating
relay is turned on
Slave 2 WSU DC voltage is not charged after Slave 2 WSU operating
relay is turned on
• Compressor maintenance by Master WSU high pressure switch
• Flow rate insufficient or Master WSU flow switch failure
• Compressor maintenance by Slave 1 WSU high pressure switch
• Flow rate insufficient or Slave 1 WSU flow switch failure
• Compressor maintenance by Master WSU high pressure switch
• Flow rate insufficient or Slave 2 WSU flow switch failure
Master WSU input power over or under voltage
Slave 1 WSU input power over or under voltage
Slave 2 WSU input power over or under voltage
Initial operation failure due to Master WSU inverter compressor error
Initial operation failure due to Slave 1 WSU inverter compressor error
Initial operation failure due to Slave 2 WSU inverter compressor error
Inverter compressor off due to Master WSU inverter DC voltage too high
Inverter compressor off due to Slave 1 WSU inverter DC voltage too high
Inverter compressor off due to Slave 2 WSU inverter DC voltage too high
Master WSU inverter compressor error or operating component (IPM)
error operation
Slave 1 WSU inverter compressor error or operating component (IPM)
error operation
Slave 2 WSU inverter compressor error or operating component (IPM)
error operation
117
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