Installation and Maintenance Manual

Diagnostics
202 RLC-SVX09H-EN
High Pressure Cutout -
Compressor 1A
Circuit Immediate Latch All
A high pressure cutout was detected on
Compressor 1A; trip at 270 ± 5 PSIG. Note:
Other diagnostics that may occur as an
expected consequence of the HPC trip will be
suppressed from annunciation. These include
Phase Loss, Power Loss, and Transition
Complete Input Open. For Air Cooled
Condenser, check for dirty coils or any fouling or
restrictions as well as proper operation and
rotational direction of all fans.
Local
High Pressure Cutout -
Compressor 2A
Circuit Immediate Latch All
A high pressure cutout was detected on
Compressor 1A; trip at 270 ± 5 PSIG. Note:
Other diagnostics that may occur as an
expected consequence of the HPC trip will be
suppressed from annunciation. These include
Phase Loss, Power Loss, and Transition
Complete Input Open. For Air Cooled
Condenser, check for dirty coils or any fouling or
restrictions as well as proper operation and
rotational direction of all fans.
Local
High Refrigerant
Pressure Ratio – Circuit
1
Circuit Immediate Latch
Service Pumpdown
Only
The pressure ratio for the respective circuit
exceeded 5.61 for 1 contiguous minute while in
service pumpdown. This pressure ratio is a
fundamental limitation of the compressor. The
pressure ratio is defined as Pcond (abs)
(Pevap(abs).
Remote
High Refrigerant
Pressure Ratio – Circuit
2
Circuit Immediate Latch
Service Pumpdown
Only
The pressure ratio for the respective circuit
exceeded 5.61 for 1 contiguous minute while in
service pumpdown. This pressure ratio is a
fundamental limitation of the compressor. The
pressure ratio is defined as Pcond (abs)
(Pevap(abs).
Remote
LCI-C Software
Mismatch: Use BAS
Tool
Circuit 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 -
Compressor 1A
(Running)
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 -
Compressor 2A
(Running)
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 –
Compressor 1A
(Stopped)
Circuit
Immediate
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
just prior to attempted compressor start. Note:
Compressor start is delayed while waiting for
oil to be detected, and compressor start is not
allowed.
Local
Loss of Oil –
Compressor 2A
(Stopped)
Circuit
Immediate
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
just prior to attempted compressor start. Note:
Compressor start is delayed while waiting for oil
to be detected, and compressor start is not
allowed.
Local
Low Differential
Refrigerant Pressure -
Circuit 1
Circuit Immediate Latch Cprsr Energized
The system differential pressure for the
respective circuit was below 25 Psid (240.5
kPa) while its compressor was unstepped or
pressure ratio was below 1.75 if stepped - for a
varying period of time – refer to specification
for trip time as a function of system DP below
the requirement.
Remote
Table 134. Main Processor Diagnostics (continued)
Diagnostic Name
Affects
Target Severity Persistence
Active Modes
[Inactive
Modes] Criteria
Reset
Level