Indoor Unit Error Display - Bosch BMS500-AAU009-0AHXXA Service Manual

Service Manual

8.1 Indoor unit error display

Operation lamp
1 time
2 times
3 times
4 times
5 times
6 times
7 times
1 times
2 times
3 times
4 times
5 times
6 times
1 times
2 times
3 times
4 times
5 times
6 times
Table 12
- light
X - off
- fl ash
* P3
1. In heating mode, when the outdoor temperature is lower than -13°F (-25℃)
for 1 hour, the indoor unit display error code P3.
2. If the outdoor temperature is higher than -7.6°F (-22℃) for 10 minutes and
compressor stop for 1 hour or outdoor temperature is higher than 23°F (-5℃)
for 10 minutes, then the unit will return to work.
* Fault Symptom: The display board shows a garbled code or a code that is not an
error code found in the service manual nor a temperature
reading.
Troubleshooting:
Use the remote controller. If the unit does not respond to the remote, the indoor PCB
needs to be replaced; if the unit does respond, then the display board needs to be
replaced.
Bosch Thermotechnology Corp. | 02.2018
Timer lamp Display
X E0
X E1
X E2
X E3
X E4
X E5
X EC
F0
F1
F2
F3
F4
F5
P0
P1
P2
P3*
P4
P5
Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump | 23
LED STATUS
Indoor unit EEPROM parameter error
Indoor / outdoor units communication error
Zero-crossing signal detection error
Indoor fan speed has been out of control
Indoor room temperature sensor T1 open circuit or short circuit
Evaporator coil temperature sensor T2 open circuit or short circuit
Refrigerant leakage detection
Overload current protection
Outdoor ambient temperature sensor T4 open circuit or short circuit
Condenser coil temperature sensor T3 open circuit or short circuit
Compressor discharge temperature sensor T5 open circuit or short circuit
Outdoor unit EEPROM parameter error
Outdoor fan speed has been out of control
IPM malfunction or IGBT over-strong current protection
Over voltage or over low voltage protection
High temperature protection of IPM module or compressor top
Outdoor ambient temperature too low.
Inverter compressor drive error
Indoor units mode confl ict (multi-zone ONLY)
If you see an error code not displayed in Table 12, contact the
manufacturer as the error displayed is for development purpose only.
Data subject to change