DORCHESTER DR-FC 25, Installation, Commissioning And Maintenance Instructions

Page: 48 / 98

Status of the water heater
48 Instruction Manual DR-FC
6
gis
1) The current time falls within a set time period of the week program.
Figure 6.4 shows the display in this situation:
- line one: the text
PROG
;
- line two: the time, the day and alternately T
1
and T
net
. See paragraph
2.3 ;
- line three: the next scheduled switch-off time and the water
temperature T
set
of the active period;
- line four: is empty, or depending on the heating cycle, a text such as
HEAT DEMAND
. See paragraph ’7.4 The water heater’s heating cycle’
2) The current time falls outside a set time period of the week program.
Figure 6.5 shows the display in this situation:
- line one: the text
PROG
;
- line two: the time, the day and alternately T
1
and T
net
. See paragraph
2.3 ;
- line three: the next scheduled switch-on time;
- line four: the text
PERIOD ACTIVATED
.
In all modes, the temperature may at any moment drop below the desired
temperature. The water heater then enters a heating cycle. This heating cycle
is the same for all basic operating modes. See paragraph
’7.4 The water
heater’s heating cycle’ .
n
Remark
Setting and programming of the basic operating modes are described in
chapter
’8 Main menu’ .
6.3 Error conditions
Figure 6.6 shows an example of an error condition. If the water heater 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 through four: alternately, a brief explanation of the error, and a brief
action to resolve the error.
c Note
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 is no longer present, these errors require a reset with the
R
button, before the water heater can resume running.
• BLOCKING ERRORS
These errors disappear automatically once the cause of the error has been
removed, after which the water heater resumes by itself.
The display does not show what type of error has been detected. For a detailed
overview of error conditions, please refer to chapter
’10 Troubleshooting’ .
If, as end-user, you find the water heater in an error condition, you may attempt
to re-start the water heater by pressing the
R
button once.
However, should the error return or become persistent, you should contact your
service and maintenance engineer.
PROG
10:00 Monday 76ÉC
MO 11:15 Tset 75ÉC
Figure 6.4 week program
active, current time within
programmed period
PROG
12:00 Monday 76ÉC
MO 11:15
PERIOD ACTIVATED
Figure 6.5 week program
active, current time outside
programmed period
S04: SENSOR ERROR
CHECK
SENSOR OR DUMMY
Figure 6.6 Example of an error
message