RTHD-SVX01L-EN
75
Local Communication Drive
Diagnostics
Table 22. Local communication drive diagnostics
Diagnostic Name
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 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
AFD Output Phase
Loss
Chiller Immediate
Latching
Compressor
Running
Drive sensed an output phase is missing. Output phase
loss is defined as greater than 15% output current
imbalance for more than 5.0 seconds.
Local
Comm Loss:
Adaptive Frequency
Drive
Chiller Normal
Non-Latching
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 6-10 second period.
Local
High Pressure
Cutout
Chiller Immediate
Latching
All
The high pressure hardware switch was tripped.
(Note: This is only created when a Local Comm AFD is
installed. It is mutually exclusive with the other High
Pressure Cutout diagnostic, so the identical names are
acceptable.)
Local
AFD Rated Current
out of Range
Chiller
Warning Latching
All
The configuration motor rated current bigger than AFD
rated current.
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
Main Processor Diagnostics
Table 23. Main processor diagnostics
Diagnostic Name
Affects
Target
Severity
Persistence
Active Modes
[Inactive Modes]
Criteria
Reset
Level
AFD Output Power
Input
Chiller
Warning
NonLatch All
Out-Of-Range Low or Hi or bad LLID, set diagnostic, This
Info diagnostic will automatically reset if the input returns to
the normal range.
Remote
Condenser Diff
Water Pressure Xdcr
Chiller
Warning Latching
All
Defective Sensor or LLID
Display invalid value
Flow calculation shall be disabled.
Remote
Diagnostics
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