Service Program; Introduction; Setting The Hysteresis; Displaying The Error History - A.O. Smith 28 30 50 60 Installation & Service Manual

is is
9
9.1

Introduction

SERVICE MENU
»HYSTERESE
^ HISTORIE OF ERRORS
È APPLIANCE HISTORY
SELECT APPLIANCE
PUMP RELAY
SERVICE INTERVAL
CONTRAST DISPLAY
TIME BACKLIGHT
SCROLLSPEED
Figure 9.1 Service program
9.2 Setting the
hysteresis
HYSTERESE UP »3ÉC
Figure 9.2 Heating cycle upper
limit
9.3 Displaying the error
history
Release R.1.3 UK

Service program

The service program is used by the installer or service and maintenance
engineer for:
• Setting the hysteresis;
• Displaying the error history;
• Displaying the appliance
• Display the selected appliance;
• Setting the pump on/off;
• Setting the service interval;
• Setting the display contrast;
• Setting the backlight time;
• Setting the display scroll
These sub-menus are briefly described in the following paragraphs. If you are
not familiar in general with how to use the displays and menus, first read chapter
'5 The control panel'.
n
Remark
The notation convention for the service menu is identical to that described
in paragraph '8.2 Notational convention for menu-related
difference is, you use S to bring up the service program, instead of B
which brings up the main menu.
If the preset temperature (SETPOINT) is higher than the current water
temperature, then the appliance might not immediately start the heating cycle
(see chapter '7.4 The appliance's heating
frequent switching on and off, a there is a heating margin. We refer to this
margin as the hysteresis. The standard setting for this margin is 2°C. The
heating cycle starts if the water temperature drops to 2°C below the SETPOINT
and ends when the water reaches 2°C above the SETPOINT.
Set the hysteresis via:
•
S: HYSTERESE UP
Figure 9.2 shows an example.
Set the hysteresis via
•
S:
HYSTERESE DOWN
Display the error history via:
•
S: HISTORIE OF ERRORS
The controller will display an overview of 'Blocking errors' and 'Lock out errors'.
In both cases, note that the ThermoControl reserves 15 lines for the last 15 error
messages. If there are less than 15 error messages, then an ellipsis (...) is
displayed. The display first shows the 'Blocking errors'. When E is
pressed, the 'Lock out Errors' are then displayed.
history;
speed.
cycle'). To prevent excessively
Introduction
instructions'. The
65