A.O. Smith SGS - 100, Installation, User And Service Manual

Page: 69 / 121

Status of the water heater
66 Instruction manual SGS
8
gis
8.2.4
PROG
In this mode a preset week program is active, and the
water heater responds continually to demand within
the time periods set in the week program. There are
two distinct situations possible in this mode:
1. The current time falls within 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
; (9.3 "The
appliance's heating cycle")
- 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
operating cycle (9.3 "The appliance's
heating cycle") , displays a text such as
HEAT DEMAND
.
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
; (9.3 "The
appliance's heating 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 (9.3 "The appliance's heating 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.
PROG
10:00 Monday 76ÉC
MO 11:15 Tset 75ÉC
PROG
12:00 Monday 76ÉC
MO 11:15
PERIOD ACTIVATED
S04: SENSOR ERROR
CHECK
SENSOR OR DUMMY