Starter Diagnostics - Trane RTAF-SVX001K-EN Manual

Starter Diagnostics

Table 32. Starter diagnostics
Diagnostic Name and
Source
Motor Current Overload - xy
Over Voltage
Phase Loss - xy
Phase Reversal - xy
Power Loss - xy
Severe Current Imbalance xy
Starter Comm Loss: Main
Processor - xy
RTAF-SVX001K-EN
Affects
Severity Persistence
Target
Circuit Immediate Latch
Chiller Normal NonLatch
Cprsr Immediate Latch
Cprsr Immediate Latch
Cprsr Immediate NonLatch
Circuit Immediate Latch
Cprsr Immediate Latch
Active
Modes
[Inactive
Modes]
Compressor current exceeded overload time vs.
Cprsr
trip characteristic. Must trip = 140% RLA, Must
Energized
hold=125%, nominal trip 132.5% in 30 seconds
Pre-Start and
Nom. trip: 60 seconds at greater than 112.5%, ?
Any Ckt(s)
2.5%, Auto Reset at 110% or less for 10 cont secs.
Energzd
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
Start Sequence
Starter Module at a minimum, 3 seconds
and Run modes
maximum. Actual design trip point 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
seconds from compressor start.
Compressor
A phase reversal was detected on the incoming
energized to
current. On a compressor startup, the phase
transition
reversal logic must detect and trip in a maximum
command [All
of 0.3 second from compressor start.
Other Times]
The compressor had previously established
currents while running and then all three phases
of current were lost. Design: Less than 10% RLA,
trip in 2.64 seconds. This diagnostic will preclude
the Phase Loss Diagnostic and the Transition
Complete Input Opened Diagnostic from being
called out. To prevent this diagnostic from
All compressor occurring with the intended disconnect of main
running modes power, the minimum time to trip must be greater
[all compressor than the guaranteed reset time of the Starter
starting and module. Note: This diagnostic prevents nuisance
non-running latching diagnostics due to a momentary power
modes] loss – It does not protect motor/compressor from
uncontrolled power reapplication. See Momentary
Power Loss Diagnostic for this protection. This
diagnostic is not active during the start mode
before the transition complete input is proven.
Thus a random power loss during a start would
result in either a "Starter Fault Type 3" or a
"Starter Did Not Transition" latching diagnostic.
A 30% Current Imbalance has been detected on
All Running
one phase relative to the average of all 3 phases
Modes
for 90 continuous seconds.
The Starter module detected a continual loss of
communication with the main processor for
All
greater than the Communications Loss Time
bound setpoint.
Diagnostics
Criteria
Reset
Level
Local
Remote
Local
Local
Remote
Local
Local
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