American Water Heater STCE3-52/80/119 ユーザーズマニュアル
Servicing should only be performed by a Qualified Service Agent
51
ELECTRONIC CONTROL SYSTEM
Table 2 - Operating States
Table 3 - Control System Menus
STATE
DESCRIPTION
Standby
The water heater is not in an active heating cycle. This usually indicates the
temperature in the tank has reached the Operating Set Point and the control system
has terminated the heating cycle.
temperature in the tank has reached the Operating Set Point and the control system
has terminated the heating cycle.
Heating
The control system is in the Heating Mode. At least one bank of heating elements has
been energized.
been energized.
Alert
The control system has detected/declared an Alert Condition. The controls system will
continue heating operation. However, a Qualified Service Agent should be contacted to
check/service the water heater.
continue heating operation. However, a Qualified Service Agent should be contacted to
check/service the water heater.
Fault
The control system has detected/declared a Fault Condition. The control system will
discontinue heating operation and “lock out.” Power to the water heater must be cycled
off and on to reset the control system. Note; cycling power will not reset the control
system until the condition that caused the fault has been corrected.
discontinue heating operation and “lock out.” Power to the water heater must be cycled
off and on to reset the control system. Note; cycling power will not reset the control
system until the condition that caused the fault has been corrected.
MENUS
†
†. This table shows a list of the control system menus. These menus will be explained in greater detail
in the pages that follow.
DESCRIPTION
Temperatures
Most commonly accessed menu. Operating Set Point, Differential settings, Tank
Temperature and Tank Probe Offset are located in this menu.
Temperature and Tank Probe Offset are located in this menu.
Heater Status
Current Operating State/Mode (heating/standby etc) and status (open/closed - on/off -
yes/no) of monitored water heater functions and components are displayed in this
menu.
yes/no) of monitored water heater functions and components are displayed in this
menu.
Economy Mode
Setup
Setup
Seven day 24 hour time clock with temperature set back capability to reduce operating
costs during unoccupied or reduced demand periods.
costs during unoccupied or reduced demand periods.
Alarm Output Setup
The control system’s CCB (Central Control Board - see page 42) features on board
SPDT (single pole double throw) relay contacts for building EMS (Energy Management
System) notification of operational conditions such as Fault Conditions and heating
mode status. This menu features a list of user definable conditions for relay activation.
SPDT (single pole double throw) relay contacts for building EMS (Energy Management
System) notification of operational conditions such as Fault Conditions and heating
mode status. This menu features a list of user definable conditions for relay activation.
Display Settings
Temperature units (°F or °C), appearance (brightness contrast) and backlight delay
user adjustable settings are located in this menu.
user adjustable settings are located in this menu.
Heater Information
Elapsed time of operation, total heating cycle time, heating cycle count, heating
element bank(s) cycle count and heating bank on time along with UIM and CCB
software revisions can be viewed in this menu.
element bank(s) cycle count and heating bank on time along with UIM and CCB
software revisions can be viewed in this menu.
Current Fault/Alert
Displays any current Alert or Fault messages.
Fault History
Retains 9 event history of Fault/Alert messages with time stamp. The Fault History is
useful when dealing with intermittent operational problems or when the customer has
reset the control system prior to a service agent’s arrival.
useful when dealing with intermittent operational problems or when the customer has
reset the control system prior to a service agent’s arrival.
Fault Occurrence
Total accumulated number each individual Fault condition has occurred is displayed in
this menu. This running total of Fault Occurrences can be useful in determining which
(if any) operational problems have been persistent.
this menu. This running total of Fault Occurrences can be useful in determining which
(if any) operational problems have been persistent.
Restore Factory
Defaults
Defaults
This control system feature allows the user to restore control system user settings to
their factory default settings. Alarm Output Setup and Display Settings menu items
ARE NOT changed when factory defaults are restored.
their factory default settings. Alarm Output Setup and Display Settings menu items
ARE NOT changed when factory defaults are restored.
Help Menu
Accessible by pressing the corresponding Operational Button from most menus and
screen displays. This menu provides access to instructions and explanations for user
settings, Operating States, Status Icons, manufacturer’s web address, technical
support phone number and service agent contact information.
screen displays. This menu provides access to instructions and explanations for user
settings, Operating States, Status Icons, manufacturer’s web address, technical
support phone number and service agent contact information.