Diagnostic Name
and Source
Affects
Target
Severity
Persistence Active Modes
[Inactive Modes]
Criteria
Reset
Level
Power Loss - xy
Cprsr
Immediate
NonLatch
All compressor run-
ning modes
[all compres-
sor starting and
non-running modes]
The compressor had previously estab-
lished 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 Tran-
sition Complete Input Opened Diagnos-
tic 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 diagnos-
tics 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
Severe Current
Imbalance - xy
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 continu-
ous seconds.
Local
Starter Failed to
Arm/Start - xy
Cprsr
Immediate
Latch
All
Starter failed to arm or start within the
allotted time (15 seconds).
Local
Starter Fault Type I
- xy
Cprsr
Immediate
Latch
Starting - Y Delta
Starters Only
made to ensure that there are no cur-
rents detected by the CT's. If currents
at start, then one of the other contac-
tors is shorted.
Local
Starter Fault Type II
- xy
Cprsr
Immediate
Latch
Starting All types
of starters
a.
the Shorting Contactor (1K3) is
individually energized and a check is
made to ensure that there are no cur-
rents detected by the CT's. If current
is detected when only S is energized
at Start, then 1M is shorted.
b. This test in a. above applies to all
forms of starters (Note: It is un-
derstood that many starters do not
connect to the Shorting Contactor.).
Local
Starter Fault Type
III - xy
Cprsr
Immediate
Latch
Starting
[Adaptive Frequency
Starter Type]
As part of the normal start sequence
to apply power to the compressor, the
Shorting Contactor (1K3) and then the
Main Contactor (1K1) were energized.
1.6 seconds later there were no currents
detected by the CT's for the last 1.2
Seconds on all three phases. The test
above applies to all forms of starters
except Adaptive Frequency Drives.
Local
Transition Complete
Input Shorted - xy
Cprsr
Immediate
Latch
Pre-Start
The Transition Complete input was found
to be shorted before the compressor was
started. This is active for all electrome-
chanical starters.
Local
Transition Complete
Input Opened - xy
Cprsr
Immediate
Latch
All running modes
The Transition Complete input was found
to be opened with the compressor motor
running after a successful completion of
transition. This is active only for Y-Delta,
82
RTAG-SVX001H-EN
Auto-Transformer, Primary Reactor, and
X-Line Starters. To prevent this diagnos-
tic from occurring as the result of a pow-
er loss to the contactors, the minimum
time to trip must be greater than the
trip time for the power loss diagnostic.
Local
Controls