Rinnai E75CN - Manual (Page 67)

Installation & Servicing Instructions Rinnai E-Series
67
check the boiler
pump
no water flow can be detected through the
controller. De-aeration cycle is started. When
water flow is detected during this cycle, the
de-aeration cycle is terminated and the burner
is released.
check that the pump is functioning and/or
that the water pressure sensor is working
properly;
Polluted pump;
Wiring of pump or water pressure sensor;
15.1.7 Block 86
check the main
power supply
The frequence of the power supply deviates
more than 2,5Hz (<57,5Hz, >62,5Hz)
15.1.6 Block 85
check the installation for the presence of air;
If there is a secondary pomp installed and
it is not hydraulicly seperated could cause
pressure differences.