Error Diagnosis And Countermeasure Flow Chart; Error Code 43; Error Code 52; Error Code 53 - Bosch AHUW036A2 Service Manual

2.9 Error code 32
Display
code Title Cause of error
32 High • Overload
temperatur operation
e in (outdoor fan
discharge constraint,
pipe of the screened,
inverter blocked
compressor
• Poor INV
comp
discharge
sensor
• LEV
connector
displaced /
poor LEV
assembly
Table 17 Error code 32
2.9.1

Error diagnosis and countermeasure flow chart

Is the heating water flow No ->
sufficient?
Yes
Is there enough No ->
refrigerant?
Yes
Is the EEV properly No ->
assembled?
Yes
Is the inverter No ->
compressor sensor
normal?
Table 18 Error diagnosis and countermeasure chart
Inspecting inverter compressor discharge sensor
1. Set multi-tester to resistance measurement mode.
2. Measure the resistance between inverter discharge sensor
connector pins.
3. Measure resistance value of 200k10%, 25 °C basis.
4. Check if the sensor insulation is damaged, measure the resistance
between sensor connector pin and unit assembly pipe (1M or
more)
Split ODU – 6 720 817 722 (2015/06)
Check point & Normal
condition
1. Check outdoor fan
constraint / screened /
flow structure
2. Check refrigerant leakage
3. Check if the sensor is
normal
4. Check the status of EEV
assembly
1. Check that the heating water
circulation pump is working
2. Check that the heating water
flow rate is sufficient
3. Check preassure gauge
(1.5~2.5 bar)
-->Remove cause of error
1. Check refrigerant leakage
2. Supply refrigerant if not
enough
1. Check the status of PCB
(inverter) EEV1 assembly
2. Check the status of EEV
assembly
3. Check PCB (inverter) IPM
input signal connectors short-
circuit
--> Refer to CH21 trouble
shooting method
1. Check the sensor assembly
status
2. Check if the sensor is broken:
measure resistance
200k10% (25 °C basis)
Error handling instructions for Split outdoor unit
Fig. 19 CN_TH3 connector
[1] CN_TH3 (red 4pin connector)
1
6 720 817 722-17.1I
21