The Control Panel; Introduction; Controls; Meaning Of Icons - A.O. Smith SGS - 100 Installation & Service Manual

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7.1

Introduction

Topics covered in this chapter:
•

Controls;

• Meaning of icons;
• Electronic controller ON/OFF
• Navigation buttons;
• PC connection.
7.2 Controls
The figure shows the electronic controller.
The control panel is completely menu-driven, and
comprises:
• a 4-line display with 20 characters per line;
• 6 pushbuttons for operating the appliance (below
the display);
• 6 graphical symbols (above the display);
• a connector for a service PC;
• an ON/OFF switch.
The pushbuttons are divided into three groups:
• Navigation buttons:
- Buttons for UP , and DOWN
- Enter: ;
- Reset button:
• the main menu (11 "Main
• the service program (12 "Service
This chapter is specifically intended for the service
and maintenance engineer and installation
engineer.
In this manual, the display of the electronic controller
is shown as in the figure, both with and without icons.
Instruction manual SGS

The control panel

switch;
;
menu"): ;
program"): .
a
»START OPERATION
^ CHANGE SETPOINT
È Tset=70ÉC
7.3

Meaning of icons

The table explains the meanings of the icons.
Icons and their meaning
Name Meaning
Heat demand Heat demand detected
Purge Pre- and post-purge using
fan
Pressure switch Pressure switch is closed
Glowing (Pre)glow
Gas control Gas control open/ignition
Flame detection Appliance operational
7.4

Electronic controller ON/OFF switch

The ON/OFF switch of the electronic controller is used
to switch the appliance ON and OFF. Note that in the
OFF position the appliance remains electrically live, in
order for the continuous pump to stay running.
INTERNAL CHECK
After switching on, the text INTERNAL CHECK
appears on the display for about 10 seconds. Themain
menu (11 "Main menu") then appears. If no selection
is made in the main menu, the appliance automatically
switches to the OFF mode
Note
To electrically isolate the appliance, you must use
the isolator between the appliance and the mains
power supply.
(8.2 "Operating modes").
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