A.O. Smith 100 Series, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Agent
FAULT/ALARM HANDLING
Each Burner Control reports to the OI display when a safety lockout or an Alert occurs.
Safety lockouts are indicated on each configuration page as an alarm bell symbol. At the status page (for S7999D), the History button
turns red. If the S7999D is displaying the system status icons, the control in alarm will turn red.
The lockout history can be displayed by pressing on the History button. The state information about each lockout is displayed along
with the date/time that the lockout occurred (refer to Table 9). Current date/time stamp is a display setup feature.
NOTE: In the event of a power interruption, the date/time must be reset. The OI Display does NOT have a backup means.
DATA COMMENT
Lockout time Set by display.
Fault Code Unique code defining which
lockout occurred.
Annunciator first out First interlock in limit string
results in a shutdown.
Description Fault description.
Burner Lockout/Hold Source/reason for lockout/
hold.
Burner control state
Sequence time
Burner control state timer at
time of fault.
Cycle Burner control cycle.
Run Hours Burner control hours.
I/O All digital I/O status at time of
fault.
Annunciator 1-8 states All annunciator I/O status at
time of fault.
Fault data Fault dependent data.
An alert log can be displayed for each control by pressing the Alert button on the bottom of the history status page. A description of
the alert is displayed along with the time when the alert occurred (refer to Table 10).
DATA COMMENT
Alert Line Set by display.
Alert Code Unique Code defining which
fault occured.
Description Alert description.
HISTORY BUTTON
The History button on the Home page serves not only as a button, but also displays Burner Control lockouts, holds, and alerts as they
occur. The History button can be selected at any time, regardless of which type of information is displayed, to view history information.
Pressing the History button displays a dialog box (see Figure 42 on Page 54) that allows the user to select the type of history to view.
The user can also silence an audible alarm generated by the control during a lockout or alert by alarm condition.
This History dialog box provides an exploded view of the status information displayed in the History button (the font is larger). One of
the four buttons (OK, Lockouts, Alerts, or Silence) can be selected. If none of these buttons are selected the dialog box closes after
30 seconds.
TABLE 9. BURNER CONTROL LOCKOUT HISTORY
TABLE 10. BURNER CONTROL ALERT LOG