Trane Tracer CH530 - Power Loss and Current Imbalance Diagnostics

Diagnostics
RLC-SVU05A-E430
Diagnostic Name
and Source
Affects
Ta r g e t
Severity Persistence
Active Modes
[Inactive Modes]
Criteria Reset Level
Phase Loss -
Compressor 2A
*Circuit 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
Power Loss -
Compressor 1A
*Circuit Immediate
NonLatch
All compressor
running modes
[all compressor
starting and non-
running modes]
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
occurring with the intended disconnect of main power,
the minimum time to trip must be greater than the
guaranteed reset time of the Starter module. Note: This
diagnostic prevents nuisance latching diagnostics due to
a momentary power 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.
Remote
Power Loss -
Compressor 2A
*Circuit Immediate
NonLatch
All compressor
running modes
[all compressor
starting and non-
running modes]
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
occurring with the intended disconnect of main power,
the minimum time to trip must be greater than the
guaranteed reset time of the Starter module.
Remote
Severe Current
Imbalance -
Compressor 1A
*Circuit Immediate
Latch
All Running Modes A 30% Current Imbalance has been detected on one
phase relative to the average of all 3 phases for 90
continuous seconds.
Local
Severe Current
Imbalance -
Compressor 2A
*Circuit Immediate
Latch
All Running Modes A 30% Current Imbalance has been detected on one
phase relative to the average of all 3 phases for 90
continuous seconds
Local
Starter Fault Type I -
Compressor 1A
*Circuit Immediate
Latch
Starting - Y Delta
Starters Only
This is a specific starter test where 1M(1K1) is closed
first and a check is made to ensure that there are no
currents detected by the CT's. If currents are detected
when only 1M is closed first at start, then one of the
other contactors is shorted.
Local