CBE • Power Control Systems

CBE PL50-ST

Official technical documentation and workshop diagnostics for PL50-ST.

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningStep-by-Step DIY FixSuggested Actions
Symbol ref. 17
Car battery (B1) has run down
Possible Cause: Car battery voltage goes below 12V
The alarm goes off when the voltage goes above 12.5V.DIY Safe
Symbol ref. 18
Leisure battery (B2) reserve
Possible Cause: Leisure battery voltage reaches 11.5V
Alarm goes off when the voltage goes above 12.5V.DIY Safe
Symbol ref. 18
Leisure battery (B2) discharge
Possible Cause: Leisure battery voltage reaches 10.5V
Alarm goes off when the voltage goes above 12.5V.DIY Safe
Symbol ref. 21
Minimum voltage device active (Battery protection)
Possible Cause: Leisure battery reaches the preset low voltage threshold
The electronic battery protection device disconnects the 12V users when leisure battery reaches the preset threshold and disables: pump, lights, awning light, 'AUX' and 'RH' output and 12V sockets. Users are automatically reconnected with a voltage higher than 13.5V. It is possible to connect all users for one more minute by pressing the on/off button on the control panel.DIY Safe
Symbol ref. 19
Fresh or auxiliary water tank is empty
Possible Cause: Fresh water level goes below 10% of the tank capacity
Alarm automatically turns off when level exceeds 20%.DIY Safe
Symbol ref. 20 (blinking)
Waste or auxiliary water tank is full
Possible Cause: Waste water level exceeds 90% of the tank capacity
Alarm automatically turns off when level goes below 80%.DIY Safe
Symbol 'PUMP BLOCK'
Pump block is active
Possible Cause: Water pump ran continuously for the pre-set non-stop service time
An electronic device automatically locks the water pump after a pre-set non-stop service time.DIY Safe
Red LED under fuse
Broken fuse alarm
Possible Cause: A fuse is broken
Before replacing the fuse find the problem that determined the system to intervene and in case, have it fixed by relying on expert technicians. Replace with another fuse with the same value.DIY Check / Tech Fallback