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BA ROTEX HPSU compact 4 - 09/2013
8 x Faults and malfunctions
8.2 Malfunctions
Malfunction Possible cause Possible solution
System not working
(Operation LED off,
nothing on the display)
No mains voltage
● Switch on the external main switch of the machine.
● Switch on system fuse(s).
● R
eplace system fuse(s).
Program clock is not
w
orking or programmed
switching times have
been carried out at the
wrong time.
Time or weekday have not been set correctly.
● Se
t the clock
● Set the weekday
Program clock is deactivated. ● Activate program clock.
During a switching time the user made a manual
setting (e.g. changed the target temperature,
changed the operating mode)
● Deactivate program clock and activate it again.
● Select correct operating mode.
Control unit does not
respond to entries
Operating system of control unit
crashed.
● Carry
out RESET of control unit.
● Restart system (mains voltage).
Operating data are not
upda
ted
Operating system of control unit
crashed.
● Carry
out RESET of control unit.
● Restart system (mains voltage).
● H
ave the system checked by a ROTEX heating
technician.
Heating does not warm
up
Room heating standby switched off (e.g. time
program is in the economy phase, outside tem-
perature is too high, parameters for backup
hea
ter (BUH) are set incorrectly, requirement
for hot water is active)
● C
heck the operating mode setting.
● C
heck the request parameters.
● Check the setting of time a weekday in the control
system.
Refrigerant compressor is not working.
● Have the system checked by a ROTEX heating
technician.
System is in the operating mode "Cooling". ● Switch the operating mode to "heating".
Settings for off-peak mains connection do not
correspond to settings for electrical connec-
tions.
● Have the system checked by a ROTEX heating
technician.
The power company has sent the high-cost sig-
nal.
● Wait for the repeat off-peak rate signal which reacti-
vates the power supply.
Heating does not warm
up eno
ugh
Water flow too low.
● C
heck that all stop valves of the water circuit are
completely open.
● Bleed system completely.
● U
sing the controller (rotary switch position ) check
whether sufficient water pressure (> 0.5 bar) is
available.
● H
ave the system checked by a ROTEX heating
technician.
Target value range is too low.
● H
ave the system checked by a ROTEX heating
technician.
Weather-dependent set value regulation is
active.
● C
heck the settings on the level "HC Configuration" of
the parameters [T-Outside lim day], [Heat-Slope] and
the settings in the rotary switch position .
Optional: Backup heater (BUH) not switched on.
● H
ave the system checked by a ROTEX heating
technician.
Water volume in system too low
● C
heck water volume and associated primary
pressure in expansion container, top up with water or
reconfigure primary pressure (see installation manual
for heat generator).
Hot water supply is taking too much of the
output of the heat pump.
● C
heck the settings of the parameter [Equilibrium
Temp] in level "Configuration", sub-level "System
Configuration".
● H
ave the system checked by a ROTEX heating
technician.
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