36
4000122704-1
FAULT: THE WATER AT THE TAPS IS LUKE-WARM.
Turn it up.
NO
NO
YES
YES
Is the setting high enough?
Check that the flow restrictor on the cold
water inlet is fitted.
Check the rate of flow.
Check the thermistor.
Check the 3-way valve is not passing
into the radiators. (The radiators should
stay cold in Summer setting)
Is the temperature higher if you reduce
the flow through the taps?
FAULT: THE RADIATORS ARE LUKE-WARM.
The temperature of the radiators
depend on the outside temperature.
If the room temperature is not sufficient,
adjust
YES
YES
NO
NO
Is the installation fitted with an
external sensor?
The radiators will only be hot if the
thermostat is demanding heat. If the
room temperature is not sufficient, turn
the setting of the room thermostat up.
Is the heating setting high enough?
YES
Turn it up.
Is the heating power adequate?
- Check set point P3.
- Check the adjustment of the by-pass (too far open).
- F30E Only Check the 3-way valve is not passing
into the domestic hot water heat exchanger.
- Check the circulation in the radiators.
- Check the thermistor.
- If problem persists, change the interface
board or the control board (PCB).
NO
Is the installation fitted with a
room thermostat?
18 Fault Finding
F30E ONLY
