Installation and Maintenance Manual

RLC-SVX09H-EN 193
Diagnostics
Diagnostic Name and Source: Name of Diagnostic and
its source. Note that this is the exact text used in the User
Interface and/or ServiceTool displays.
AffectsTarget: Defines the “target” or what is affected
by the diagnostic. Usually either the entire Chiller, or a
particular Circuit or Compressor is affected by the
diagnostic (the same one as the source), but in special
cases functions are modified or disabled by the diagnostic.
None implies that there is no direct affect to the chiller, sub
components or functional operation.
Severity: Defines the severity of the above effect.
Immediate means immediate shutdown of the affected
portion, Normal means normal or friendly shutdown of
the affected portion, Special Action means a special
action or mode of operation (limp along) is invoked, but
without shutdown, and Info means an Informational Note
or Warning is generated.
Persistence: Defines whether or not the diagnostic and
its effects are to be manually reset (Latched), or can be
either manually or automatically reset when and if the
condition returns to normal (Nonlatched).
Active Modes [Inactive Modes]: States the modes or
periods of operation that the diagnostic is active in and, as
necessary, those modes or periods that it is specifically
“not active” in as an exception to the active modes.The
inactive modes are enclosed in brackets, []. Note that the
modes used in this column are internal and not generally
annunciated to any of the formal mode displays.
Criteria: Quantitatively defines the criteria used in
generating the diagnostic and, if nonlatching, the criteria
for auto reset. If more explanation is necessary a hot link
to the Functional Specification is used.
Reset Level: Defines the lowest level of manual
diagnostic reset command which can clear the diagnostic.
The manual diagnostic reset levels in order of priority are:
Local or Remote. For example, a diagnostic that has a
reset level of Remote, can be reset by either a remote
diagnostic reset command or by a local diagnostic reset
command.
HelpText: Provides for a brief description of what kind of
problems might cause this diagnostic to occur. Both
control system component related problems as well as
chiller application related problems are addressed (as can
possibly be anticipated).These help messages will be
updated with accumulated field experience with the
chillers.