Bosch Climate 5000 Series Service Manual page 76

Service Manual
8.6.14 High temperature protection of compressor top (PC 02)
Error Code
Malfunction decision conditions
Supposed causes
Table 45
Troubleshooting:
Check if the air flow system
of indoor and outdoor units
are obstructed?
No
Turn off the power supply and turn
it on 10 minutes later.
Yes
Check if the temperature
on top of compressor
Is more than 90°C (194°F)
Yes
Check if there is any
refrigerant leaking
Yes
Replace the outdoor PCB.
Figure 80
7 6 |
PC 02
If the sampling voltage is not 5V, the LED will display the failure.
Improper / Incorrect Wiring
f
Over load protector faulty
f
System leakage or blockage
f
Outdoor PCB faulty
f
Clear up the air inlet and outlet as well as the heat
Yes
exchanger of indoor and outdoor units.
Check if all the connection, especially
No the connection of overload protector
sensor is secure.
Measure the resistance
between the two ports of
the overload protector.
Is it zero?
No
Refrigerant leak should be repaired
and unit properly recharged.
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
No
Yes
No Replace the overload protector.
Yes Replace the outdoor PCB.
Correct the connection.