Removing A Displayed Fault - Bosch HPC 400 Operating Instructions Manual

38 | Eliminate fault
9.2

Removing a displayed fault

NOTICE: System damage due to frost! The
system can freeze up if it is taken out of service
due to fault shutdown.
▶ Use Tab. 49 to check if the fault can be
fixed.
▶ If the fault cannot be fixed, contact your
contractor immediately.
A fault in your system is indicated on the display of the user
interface.
Fig. 6 Error display
Faults you can fix yourself
Cause or fault description Test procedure/Cause
Nothing appears on the display
A01 5450 Warning Z1 Condensate
drain blocked
A01 5451 Service required on heat
pump
A01 5454 Warning Z2 Condensate
drain blocked
A01 5526 Alarm Z2 Defrosting failed
A11 1010 No communication via BUS
conn EMS 2
A11 1038 Invalid time/date
A11 3061 No communication with
3062 mixer module (3061:
3063 heating circuit 1, ..., 3064:
3064 heating circuit 4)
A11 6004 No communication w. solar
module
Table 49
6 720 817 986 (2015/07)
CLIMATE CONTROL SYSTEMS
6 720 811 136-43.1O
System is switched off.
The power supply to the user interface
has been interrupted.
Check whether the condensate drain is
dirty (e.g. leaves, soil)
Maintenance required. The system
keeps operating as far as possible.
Check whether the condensate drain is
dirty (e.g. leaves, soil)
Check whether the outdoor unit is dirty.
Check the evaporator in particular for
dirt.
–
Date/time not yet set
Prolonged loss of power supply
–
–
VOGEL
If there are multiple faults, the fault with the highest priority will
be displayed. Fault codes and sub-codes are displayed. The
codes inform your contractor about the possible cause.
Confirm a fault (press the selector) to switch to the standard
display. The continued presence of the fault is indicated in the
info line. If the fault is still active, it can be restored to the
display by pressing the Back key.
The cause can be a fault on the user interface, in a component,
in an assembly or on the heat source.
The system keeps operating as much as possible; in other
words, heating of the home can continue.
Corrective measure
▶ Switch on the system.
▶ Check that the user interface is
▶ Clean the condensate drain
▶ Make arrangements to have the
▶ Clean the condensate drain
▶ Clean the outdoor unit (particularly
▶ Check that the user interface is
▶ Set date/time.
▶ Avoid voltage failures.
▶ Check that the user interface is
▶ Check that the user interface is
NOOT
&
correctly seated in its wall bracket.
system serviced by your contractor.
the evaporator)
correctly seated in its wall bracket.
correctly seated in its wall bracket.
correctly seated in its wall bracket.
HPC 400