DORCHESTER DR-FC 120, Installation, Comissioning And Maintenance Instructions

Page: 54 / 100

Status of the water heater
52 Instruction manual DR-FC
8
gis
2. The current time falls outside a set time period
of the week program.
The figure shows the display with the following
information:
-
line one: the text
PROG
;
- line two: the time, the day and
T
1
; (2.3 "Water heater operating cycle")
- line three: the next scheduled switch-on
time;
- line four: displays the text
PERIOD ACTIVATED
.
In all modes, the temperature may at any moment
drop below the desired temperature. The water heater
then enters an operating cycle. This operating cycle is
identical
(2.3 "Water heater operating cycle") for all
basic operating modes.
Note
Setting and if necessary programming of the basic
operating modes are described in the main
menu
(11 "Main menu") chapter.
8.3 Error conditions
The figure 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 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
water heater can resume operation.
• BLOCKING ERRORS
These errors disappear automatically once the
cause of the error has been removed, after which
the water heater 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 "Errors") .
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
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
. If this message appears, the
water heater needs a service and maintenance
inspection. In this 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. If the service interval has been
incorrectly selected, contact the service and
maintenance engineer for instructions on how to
rectify this. Information on the frequency of
maintenance is provided elsewhere in the
manual
(14 "Service interval") .
8.5 Anode warning
This message appears when the anode protection is
no longer active. If the message appears, you must
contact your service and maintenance engineer.
Note
The water heater continues to function when this
message appears.
S04: SENSOR ERROR
CHECK
SENSOR OR DUMMY
!!! WARNING !!!
MAX. BURNING HOURS:
SERVICE REQUIRED
!!! WARNING !!!
POWER ANODE
MALFUNCTION