Boiler Control Instruction & Operation Manual, Rev 1
Page
47
of 64
Troubleshooting
General Issues (continued)
History Bar
Color
Condition
Description
Red
Lockout
•
A lockout causes the boiler control to shut down and requires manual or
remote reset to clear the lockout.
•
Always causes alarm contacts to close.
•
Logged in lockout history.
Yellow
Hold
•
A hold causes the boiler control to shut down but does not require
manual or remote reset to clear it. If the hold condition clears, then
normal operation will continue.
•
The alarm contact will not close for a hold.
•
Holds are not logged in history.
Orange
Alert
•
Every other kind of problem that isn't a lockout or hold is an alert. Examples
include boiler control abnormal holds, LL master problems, faults from non-
safety functions, etc.
•
Alerts never require manual intervention to reset them; that is, if the alert
clears up, then normal operation will continue. An alert is not a condition, it
is an event. The cause of the alert may be a condition, e.g. something that
is causing an abnormal hold, but the alert itself in this case is a momentary
event generated upon entry to that condition.
•
Whether the alarm contact closes or not is programmable for each alert by
the OEM.
•
Alerts are logged in a 15-item volatile alert history sorted in chronological
order. Only one instance of each alert code occurs in the history,
corresponding to the most recent occurrence of that alert.
