Bosch Climate 5000 Series Service Manual page 61

Service Manual
8.6.12 High temperature protection (condenser) (P5)
Error Code
Malfunction decision conditions
Supposed causes
Table 31
Troubleshooting:
High temperature protection of
High temperature protection of
condenser
condenser
Check whether the
Check whether the
condenser temperature is
condenser temperature is
Higher than 65°C (149°F)
Higher than 65°C
Yes
Check whether the outdoor
Check whether the outdoor
ambient temperature is
ambient temperature is
higher than 50°C (122°F)
higher than
No
Check if the outdoor unit
Check if the outdoor unit
is properly ven lated
Yes
Check if the outdoor fan
is running properly
Yes
Check whether the heat
Check whether the heat
exchanger is dirty
exchanger is dirty
No
Replace outdoor PCB
No
Check refrigerant level and
add as necessary
Figure 69
Bosch Thermotechnology Corp. | 08.2020
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units | 61
P5
When the outdoor pipe temperature is more than 65°C, the system will stop. The system will operate
again when outdoor pipe temperature is less than 52°C.
Condenser temperature sensor (T3) faulty
Dirty heat exchanger
System leakage or blockage
Outdoor PCB faulty
Check the connection
Check the connection
between temperature
between temperature
No
Check whether the
resistance of condenser
resistance of condenser
temp. sensor is within normal
range as defined
Yes Stop the system
Ensure outdoor unit is
No
properly ventilated
Follow troubleshoo ng steps outlined
in Sec on 8.6.7. Outdoor fan speed
No
malfunc on (E8)
Yes
Clean the heat exchanger
Clean the heat exchanger
No
sensor and PCB.
sensor and PCB.
Yes
heck whether the e
No
Replace the temperature sensor
eplace the temperature sensor
in Appendix 1
Yes
Correct the connection
Correct the connection
Data subject to change