92
AC-SVX001A-EN
Table 27. Diagnostics — main processor (continued)
Diagnostic
Name
Affects
Target
Severity
Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level
High Pressure
Cutout -
Cprsr2A
Circuit Immediate Latch All
A high pressure cutout was detected by AFD 2A Gate
Kill Input ; trip at 315 ± 5 PSIG
Local
High
Refrigerant
Pressure Ratio
– Ckt1
Circuit Immediate Latch
Cprsr
Energized
The pressure ratio for the respective circuit exceeded
12.3 for 1 contiguous minute while running in any
mode. The pressure ratio is defined as Pcond (abs)/
Pevap(abs)
Remote
High
Refrigerant
Pressure Ratio
– Ckt2
Circuit Immediate Latch
Cprsr
Energized
The pressure ratio for the respective circuit exceeded
12.3 for 1 contiguous minute while running in any
mode. The pressure ratio is defined as Pcond (abs)/
Pevap(abs)
Remote
Interrupt
Failure –
AFD1A
Circuit
Immediate
Shutdown and
Special Action
Latch
AFD intended
to be OFF
Respective AFD is reporting that it is still running the
compressor when the MP has commanded the drive/
compressor to be Off. Detection time shall be 10
seconds minimum and 15 seconds maximum. With
build rev 2.13 and later: 22 sec min, 27sec max. On
detection and until the controller is manually reset:
this diagnostic shall be active and the alarm relay
shall be energized, the Evap Pump Output will be
energized, the effected compressor will be
continually commanded off, and be unloaded. For as
long as compressor operation continues, the MP shall
continue liquid level, oil return, and fan control on
the circuit effected.
Local
Interrupt
Failure –
AFD2A
Circuit
Immediate
Shutdown and
Special Action
Latch
AFD intended
to be OFF
Respective AFD is reporting that it is still running the
compressor when the MP has commanded the drive/
compressor to be Off. Detection time shall be 10
seconds minimum and 15 seconds maximum. With
build rev 2.13 and later: 22 sec min, 27sec max. On
detection and until the controller is manually reset:
this diagnostic shall be active and the alarm relay
shall be energized, the Evap Pump Output will be
energized, the effected compressor will be
continually commanded off, and be unloaded. For as
long as compressor operation continues, the MP shall
continue liquid level, oil return, and fan control on
the circuit effected.
Local
LCI-C Software
Mismatch: Use
BAS Tool
Chiller Info Nonlatch All
The neuron software in the LCI-C module does not
match the chiller type. Download the proper software
into the LCI-C neuron. To do this, use the Rover
service tool, or a LonTalk® tool capable of
downloading software to a Neuron 3150®
Remote
Loss of Oil
(Running) -
Cprsr1A
Circuit Immediate Latch
Starter
Contactor
Energized
In running modes , Oil Loss Level Sensor detects lack
of oil in the oil sump feeding the compressor
(distinguishing a liquid flow from a vapor flow)
Local
Loss of Oil
(Running) -
Cprsr2A
Circuit Immediate Latch
Starter
Contactor
Energized
In running modes , Oil Loss Level Sensor detects lack
of oil in the oil sump feeding the compressor
(distinguishing a liquid flow from a vapor flow)
Local
Loss of Oil
(Stopped) –
Cprsr1A
Circuit
Immediate
Shutdown and
Special Action
Latch
Compressor
Pre-start [all
other modes]
Oil Loss Level Sensor detects a lack of oil in the oil
sump feeding the compressor for 90 seconds after
EXV preposition is completed on an attempted circuit
start. Note: Compressor start is delayed pending oil
detection during that time, but not allowed once the
diagnostic occurs
Local
Loss of Oil
(Stopped) –
Cprsr2A
Circuit
Immediate
Shutdown and
Special Action
Latch
Compressor
Pre-start [all
other modes]
Oil Loss Level Sensor detects a lack of oil in the oil
sump feeding the compressor for 90 seconds after
EXV preposition is completed on an attempted circuit
start. Note: Compressor start is delayed pending oil
detection during that time, but not allowed once the
diagnostic occurs
Local
DDiiaaggnnoossttiiccss
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