Rotex HPSU compact 304 Installation And Maintenance Manual

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FA ROTEX HPSU compact 4 - 06/2015
8 x Errors, malfunctions and messages
Room cooler does
not cool
Water flow too low.
Ɣ C
heck that all stop valves of the water circuit are
completely open.
Ɣ Ch
eck 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 th
e control unit (rotary switch position "Info" )
check that there is sufficient water pressure (>0.5 bar),
if necessary, refill the heating water.
Ɣ Ch
eck that the resistance in the water circuit is not too
high for the pump (see installation manual for
"Technical Data").
"Kühlen" switched off (e.g. room thermostat
requi
res "Kühlen", but switching time program
is in economy phase, outside temperature too
high).
Ɣ Check the operating mode setting.
Ɣ Check the request parameters.
Ɣ Ch
eck setting of the date, time and switching time
program on the control unit.
Refrigerant compressor is not working.
Ɣ With installed backup heater (BUxx):
Check whether the return flow temperature backup
heater heats up to at least 15 °C (if the return flow
tempera
ture is low, the heat pump first uses the
backup heater in order to reach this minimum return
flow temperature).
Ɣ Ch
eck mains supply of the backup heater (BUxx).
Ɣ Thermal protection switch (STB) on backup heater
(BUxx) was triggered. Unlock.
System is in the operating mode "Heizen". Ɣ Swi
tch the operating mode to "Kühlen".
Outdoor temperature < 4 °C
The heat pump has automatically switched to the "Heizen"
operating mode so as to be able to guarantee frost protec-
tion should the external temperature drop further. Room
cooling 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 Ch
eck that the water filter is dirty.
Ɣ Check that the expansion tank is defective.
Ɣ F
ully vent the heating system and device-internal
circulation pump.
Ɣ On the control unit (rotary switch position "Info" )
check that there is suffici
ent water pressure (>0.5 bar),
if necessary, refill the heating water.
Ɣ Ch
eck 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 Ch
eck the primary pressure in the expansion
container and the water pressure, if necessary, refill
the heating water and reset the primary pressure (see
chapter 7.5).
Quantity of coolant in the heating system too
low or to
o high.
Ɣ Determine 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

Rotex HPSU compact 304 Specifications

General

Brand	Rotex
Model	HPSU compact 304
Category	Controller
Language	English