Bosch ODU Split 6 - Error Code 43: High Pressure Sensor Error; Error Code 43 Diagnosis and Countermeasure Flow Chart

Error handling instructions for Split outdoor unit
Split ODU – 6 720 817 722 (2015/06)
24
2.12 Error code 43
2.12.1 Error diagnosis and countermeasure flow chart
Fig. 21 HP sensor characteristics
[1] Pressure sensor
[2] High pressure sensor: 0~5 MPa, Vout 0.5~3.5 V
Display
code
Title Cause of error
Check point & Normal
condition
43 High
pressure
sensor
error
• Abnormal
value of
sensor (open
/ short)
1. Bad connection of
connector PCB (inverter)
2. Bad connection high
pressure connector
3. Defect of connector PCB
(inverter) (open/short)
4. Defect of PCB (inverter)
Table 23 Error code 43
Is pressure sensor OK? No -> 1. Replace the pressure sensor
Yes
Is sensor connected to
PCB (inverter)
correctly?
No -> 1. Connect sensor to PCB
(inverter) correctly
Yes
After replacement of
outdoor unit main PCB
(inverter) is the system
also abnormal?
No ->
END
Yes
• Replace
corresponding PCB
(inverter)
Table 24 Error diagnosis and countermeasure chart
1
2
6 720 817 722-22.1I