Status of the appliance

54 Instruction manual GWV

8gis
In all modes, the temperature may at any moment
drop below the desired temperature. The appliance
then enters a heating cycle. This heating cycle is
identical (2.3 "The appliance's heating cycle") for all
basic operating modes.
Note
Setting and programming the basic operating
modes is described in the chapter on the Main
menu (11"Main menu").

8.2.4

EXTRA
In this mode, a single extra period is programmed and
activated. In this mode, the
PROG
and
ON
modes are
temporarily overruled to meet a single period of heat
demand. When the period has passed, the appliance
automatically returns to the previous operating mode.
The figure shows the display with the following
information:
• line one: the text
EXTRA
;
• line two: the time, the day and T1 and T3
alternately (2.3 "The appliance's heating cycle");
• line three: the switch-on or switch-off time and the
related water temperature setting;
• line four: the text
PERIOD ACTIVATED
.

8.3 Error conditions

The figure shows an example of an error condition. If
the appliance enters this condition, the display will
show the following information:
• line one: error code comprising a letter and two
digits, followed by the error description;
• lines two to four: alternately, a brief explanation of
the error, and a brief action to resolve the error.
Caution
The displayed action to resolve the error may only
be performed by a service and maintenance engineer.
There are various types of errors:
• LOCK OUT ERRORS
When the cause has been removed, these errors
require a reset with the button before the
appliance can resume operation.
• BLOCKING ERRORS
These errors disappear automatically once the
cause of the error has been removed, after which
the appliance resumes operation by itself.
The display does not show what type of error has been
detected. A comprehensive overview of the errors is
provided elsewhere in the
manual (13 "Troubleshooting").
If, as end-user, you find the appliance in an error
condition, you may attempt to restart the appliance by
pressing the button once.
However, if the error returns or occurs several times in
a short time, you must contact your service and
maintenance engineer.

8.4 Service condition

The figure shows the message
SERVICE REQUIRED
. Should this message
appear, then the appliance is in need of a service and
maintenance inspection. In that case, contact your
service and maintenance engineer.
Note
The message
SERVICE REQUIRED
is based on
the number of expired burning hours and the preset
service interval. Should the service interval have been
incorrectly selected, contact the service and
maintenance engineer for instructions on how to
adjust this. Information on the maintenance frequency
is provided elsewhere in the
manual (14 "Maintenance frequency").

8.5 Warning

The figure shows the message:
The appliance will continue to run under partial load.
Explanations of the warnings are provided elsewhere
in the manual (13 "Troubleshooting").
EXTRA
12:30 Thursday 76ÉC
TH 12:45 Tset 75ÉC
PERIOD ACTIVATED
S04: SENSOR ERROR
CHECK
SENSOR OR DUMMY
!!! WARNING !!!
MAX. BURNINGHOURS:
SERVICE REQUIRED
!!! WARNING !!!
SHORT CYCLE
PREVENTION