│
20
RTC 6i - www.regulus.eu
Compressor high outlet temperature protection
Check:
•
whether the water outlet temperature isn’t set too high (especially at low outdoor temperatures)
•
whether the heating water flow isn’t too low
•
whether there isn’t too little oil in the compressor
Finned heat exchanger temperature sensor protection
Check:
•
that sufficient airflow through the finned heat exchanger is ensured
Undervoltage / overvoltage of the power supply
Check:
•
the value of the power supply voltage
Speed limitation or compressor shutdown due to high / low outdoor temperature
This is a normal condition that does not require any intervention.
Reduction of compressor speed at low refrigerant condensation pressure
If the refrigerant pressure is too low, the compressor will reduce the speed. The device will return
to normal operation 5 minutes after the first alarm. If the alarm repeats 3 times in a row, the unit will
shut down.
Check:
•
whether there is sufficient refrigerant in the unit
•
that no refrigerant circuit leaks are present
•
technical condition of the fan and circulation pump
•
whether the expansion valve is working properly
•
whether the heating water temperature isn’t too low
•
whether the flow and return temperature difference isn’t too big
Temperature sensor error
Check:
•
sensor resistance
•
sensor connection and cable
High pressure / low pressure switch error
The error message occurs either if the pressure switch is not closed in standby mode, or 2 minutes
after the compressor is switched off.
Check:
•
the connection and the correct function of the pressure switch
Fan error
The fan has not reached the required speed or is not sending a feedback signal.
Check:
•
fan PCB
•
fan motor
•
cables
