148 RTAC-SVX01J-EN
Diagnostics
Legend to DiagnosticsTable
Legacy Hex Code: 3 digit hexadecimal code used on all
past products to uniquely identify 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.
Affects Target: Defines the “target” or what is affected
by the diagnostic. Usually either the entire Chiller,ora
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. If the affects also
includes the term Easy View Interlock, that implies that
this particular item is handled as an “interlock”
annunciation in conjunction with the EasyView, instead of
a diagnostic.
Severity: Defines the severity of the above effect.
Immediate means immediate shutdown of the effected
portion, Normal means normal or friendly shutdown of
the effected portion, Special Mode means a special 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 (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.
Starter Diagnostics
Table 66. Starter diagnostics
Diagnostic Name
and Source
Affects
Target Severity Persistence
Active
Modes
[Inactive
Modes] Criteria
Reset
Level
Motor Current
Overload -
Compressor 1A
Circuit Immediate Latch
Cprsr
Energized
Compressor current exceeded overload time vs. trip
characteristic. For A/C products Must trip = 140% RLA, Must
hold=125%, nominal trip 132.5% in 30 seconds
Local
Motor Current
Overload -
Compressor 1B
Circuit Immediate Latch
Cprsr
Energized
Compressor current exceeded overload time vs. trip
characteristic. For A/C products Must trip = 140% RLA, Must
hold=125%, nominal trip 132.5% in 30 seconds
Local
Motor Current
Overload -
Compressor 2A
Circuit Immediate Latch
Cprsr
Energized
Compressor current exceeded overload time vs. trip
characteristic. For A/C products Must trip = 140% RLA, Must
hold=125%, nominal trip 132.5% in 30 seconds
Local
Motor Current
Overload -
Compressor 2B
Circuit Immediate Latch
Cprsr
Energized
Compressor current exceeded overload time vs. trip
characteristic. For A/C products Must trip = 140% RLA, Must
hold=125%, nominal trip 132.5% in 30 seconds
Local
Over Voltage Chiller Normal NonLatch
Pre-Start and
Any Ckt(s)
Energzd
Nom. trip: 60 seconds at greater than 112.5%, 2.5%, Auto
Reset at 109% or less.
Remote
Phase Loss -
Compressor 1A
Cprsr Immediate Latch
Start
Sequence
and Run
modes
a) No current was sensed on one or two of the current transformer
inputs while running or starting (See Nonlatching Power Loss
Diagnostic for all three phases lost while running). Must hold =
20% RLA. Must trip = 5% RLA. Time to trip shall be longer than
guaranteed reset on Starter Module at a minimum, 3 seconds
maximum. Actual design trippoint is 10%. The actual design trip
time is 2.64 seconds. b) If Phase reversal protection is enabled
and current is not sensed on one or more current xformer inputs.
Logic will detect and trip in a maximum of 0.3 second from
compressor start.
Local
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