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RTHD-SVX01L-EN
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 Service Tool displays.
Affects Target: 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. Design Note: Tracer TU does not
support display of “Special Action”, on its Diagnostics
pages, so that if a diagnostic has a special action defined in
the table below, it will be displayed only as “Informational
Warning” as long as no circuit or chiller shutdown results. If
there is a shutdown and special action defined in the table,
then the Tracer TU Diagnostics Page display will indicate
the shutdown type only.
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.
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.
Starter Diagnostics
Table 21. Starter diagnostics
Diagnostic Name
Affects
Target
Severity
Persistence
Active Modes
[Inactive Modes]
Criteria
Reset
Level
AFD Drive Fault Chiller Immediate NonLatch All
The AFD Drive Fault Relay is open
Local
At Speed Input
Opened
Chiller Immediate Latch
All Running Modes
after At Speed
proven
The “At Speed” input was found to be opened with the
compressor motor running after successfully obtaining an at
speed and bypassed condition. This is active for solid state
starters and AFD
Local
At Speed Input
Shorted
Chiller Immediate Latch Pre-Start
The “At Speed” input is shorted before the compressor was
started. This is active for solid state starters and AFD.
Local
Compressor Did Not
Accelerate Fully
Chiller Immediate Latch Start Mode
The starter module did not receive an “Up to Speed” or
“End of Ramp” signal from the SSS within 2.5 seconds after
commanding a bypass, or after the maximum acceleration
time had expired, whichever is longer. This diagnostic only
applies to SSS/AFD.
Local
Compressor Did Not
Accelerate:
Shutdown
Chiller Immediate Latch Start Mode
The compressor did not come up to speed (get to <85%
RLA) in the allotted time defined by the Maximum
Acceleration Timer and the start was aborted per the starter
configuration selected.
Remote
Compressor Did Not
Accelerate:
Transition
Chiller
Warning
Latch Start Mode
The compressor did not come up to speed (get to <85%
RLA) in the allotted time defined by the Maximum
Acceleration Timer and a transition was forced (motor put
across the line) at that time. This applies to all starter types.
Note: Since RTHD SSS has no forced transition capability,
this info warning can be followed with a “Compressor did
not accelerate fully ” diagnostic above and an aborted start.
Remote
Momentary Power
Loss
Chiller Immediate Nonlatch
All compressor
running and
stopping modes [all
compressor starting
and non-running
modes]
Momentary Power Loss option disabled: No effect.
Momentary Power Loss option enabled: A loss of power on
three line cycles or more was detected. Diagnostic is reset
in 30 seconds.
Remote
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