Diagnostics
RTHD-SVX01K-EN 75
Local Communication Drive
Diagnostics
Phase Loss Chiller 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 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 transformer inputs. Logic will detect
and trip in a maximum of 0.3 second from compressor
start."
Local
Phase Reversal Chiller Immediate Latch
Compressor
energized to
transition command
[All Other Times]
A phase reversal was detected on the incoming current.
On a compressor startup the phase reversal logic must
detect and trip in a maximum of 0.3 second from
compressor start.
Local
Power Loss Chiller Immediate NonLatch
"All compressor
running modes
Table 24. Starter diagnostics (continued)
Diagnostic
Name and
Source
Affects
Target Severity Persistence
Active Modes
[Inactive
Modes] Criteria
Reset
Level
Table 25. Local communication drive diagnostics
Diagnostic
Name and
Source
Affects
Target Severity Persistence
Active Modes
[Inactive
Modes] Criteria
Reset
Level
AFD Bus Over
Voltage
Chiller Immediate Non-latching
Compressor
Running
Bus overvoltage indicated the high bus voltage cut out
has been exceeded while the AFD is in a non-stopped
mode.
Local
AFD Bus Under
Voltage
Chiller Immediate Non-latching All
The bus voltage dropped below the Low Bus Cutout
threshold and there is not enough voltage to safely
operate the load.
Local
AFD Comm Loss:
Main Processor
Chiller Immediate Latching All
The AFD detected a continual loss of communication
with the main processor for greater than the
Communications Loss Time (bound setpoint)
Local
AFD Emergency
Stop Fault
Chiller Immediate Latching All The emergency stop input was activated Local
AFD General
Failure
Chiller Immediate Latching All
Drive fault not listed in these diagnostic bytes. Catch
all.
Local
AFD Ground
Fault
Chiller Immediate Latching All
Measured ground current exceeds ground current
sensitivity.
Local
AFD
Instantaneous
Current
Overload
Chiller Immediate Latching All Instantaneous current exceeded drive capacity. Local
AFD Interrupt
Failure
Chiller Immediate Latching
"AFD not
commanded to start
or run
[AFD commanded
to start or run]
AFD is reporting that it is still running the compressor
when the MP has commanded the drive/compressor to
be Off. Detection time about 8 sec. On detection and
until the controller is manually reset, this diagnostic
shall be active, the Evap Pump Output will be
energized, the Cond Pump Output will be energized, the
effected compressor will be continually commanded off,
and be unloaded?
Local
AFD Inverter
Heatsink Over
Temp
Chiller Immediate Non-latching All
The IGBT heat sink temperature exceeded the cut out
temperature.
Local
AFD Motor
Current
Overload
Chiller Immediate Latching
Compressor
Running
Motor Overload Curve Exceeded Local
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