44
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).
●
Replace system fuse(s).
Program clock is not
working or programmed
switching times have
been carried out at the
wrong time.
Time or weekday have not been set correctly.
●
Set 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
updated
Operating system of control unit crashed.
●
Carry out RESET of control unit.
●
Restart system (mains voltage).
●
Have 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
heater (BUH) are set incorrectly, requirement
for hot water is active)
●
Check the operating mode setting.
●
Check 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 enough
Water flow too low.
●
Check that all stop valves of the water circuit are
completely open.
●
Bleed system completely.
●
Using the controller (rotary switch position
) check
whether sufficient water pressure (> 0.5 bar) is
available.
●
Have the system checked by a ROTEX heating
technician.
Target value range is too low.
●
Have the system checked by a ROTEX heating
technician.
Weather-dependent set value regulation is
active.
●
Check 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.
●
Have the system checked by a ROTEX heating
technician.
Water volume in system too low
●
Check 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.
●
Check the settings of the parameter [Equilibrium
Temp] in level
"Configuration"
, sub-level
"System
Configuration"
.
●
Have the system checked by a ROTEX heating
technician.
Summary of Contents for HPSU compact 304
Page 52: ...52 BA ROTEX HPSU compact 4 09 2013 10 x Notes 10 2 Other notes...
Page 53: ...10 x Notes BA ROTEX HPSU compact 4 09 2013 53...
Page 54: ...54 BA ROTEX HPSU compact 4 09 2013 10 x Notes...
Page 56: ...ROTEX BA ROTEX HPSU compact 4 Subject to change and correction 008 1414644_01 09 2013...
