8 x Errors, malfunctions and messages
FA ROTEX HPSU compact (V5) •
59
Room cooler does
not cool
Water flow too low.
Ɣ C
heck that all stop valves of the water circuit are
completely open.
Ɣ C
heck that the water filter is dirty.
Ɣ Check that the expansion tank is defective.
Ɣ Fully vent the heating system and device-internal
circulation pump.
Ɣ On the control un
it (rotary switch position "Info" )
check that there is sufficient water pressure (>0.5 bar),
if necessary, refill the heating water.
Ɣ Check
that the resistance in the water circuit is not too
high for the pump (see installation manual for
"Technical Data").
"Cooling" switched off (e.g. room thermostat
requ
ires "Cooling", but switching time pro-
gram is in economy phase, outside tempera-
ture too high).
Ɣ Check the operating mode setting.
Ɣ C
heck the request parameters.
Ɣ Check setting of the date, time and switching time
program on the control unit.
Coolant compressor is not working.
Ɣ With installed backup heater (BUxx):
Check whether the return fl
ow temperature backup
heater heats up to at least 15 °C (if the return flow
temperature is low, the heat pump first uses the
backup heater in order to reach this minimum return
flow temperature).
Ɣ C
heck mains supply of the backup heater (BUxx).
Ɣ T
hermal protection switch (STB) on backup heater
(BUxx) was triggered. Unlock.
System is in the operating mode "Heating". Ɣ Swi
tch the operating mode to "Cooling".
Outdoor temperature < 4 °C
The heat pump has automatically switched to the "Heating"
ope
rating mode so as to be able to guarantee frost protec-
tion should the external temperature drop further. Room
cool
ing not possible.
Cooling effect of
room cooling insufficient
Water flow too low.
Ɣ C
heck that all stop valves of the water circuit are
completely open.
Ɣ C
heck that the water filter is dirty.
Ɣ Check that the expansion tank is defective.
Ɣ Fully vent the heating system and device-internal
circulation pump.
Ɣ On the control un
it (rotary switch position "Info" )
check that there is sufficient water pressure (>0.5 bar),
if necessary, refill the heating water.
Ɣ Check
that the resistance in the water circuit is not too
high for the pump (see installation manual for
"Technical Data").
Water quantity in heating system too low.
Ɣ C
heck the primary pressure in the expansion
container and the water pressure, if necessary, refill
the heating water and reset the primary pressure
(see chapter 7.4).
Quantity of coolant in th
e heating system too
low or too high.
Ɣ D
etermine the cause for the coolant being too low or
too high in the coolant circuit.
Î If the quantity of coolant is too low, check the cool-
ant circuit for leaks, repair and top up the coolant.
Î If the quantity of coolant is too great, recycle the
coolant and refill the system with the correct vol-
ume.
Malfunction Possible cause Possible solution
To Next Page
Loading...
Need help?
General
