Trane Ascend ACR Series User Manual

AC-SVX001A-EN
99
Table 27. Diagnostics — main processor (continued)
Diagnostic
Name
Affects
Target
Severity
Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level
Very Low
Evaporator
Rfgt Pressure –
Ckt1
Chiller Immediate Latch All
The respective circuit’s evaporator pressure dropped
below 80% of the current Low Evap Refrig Press
Cutout setting (see above) or 8 psia, whichever is
less, regardless of the running state of the circuit’s
compressor. Note: Unlike previous products, even if
the circuit associated with the suction pressure
transducer is locked out, it will not defeat the
protection afforded by this diagnostic
Local
Very Low
Evaporator
Rfgt Pressure –
Ckt2
Chiller Immediate Latch All
The respective circuit’s evaporator pressure dropped
below 80% of the current Low Evap Refrig Press
Cutout setting (see above) or 8 psia, whichever is
less, regardless of the running state of the circuit’s
compressor. Note: Unlike previous products, even if
the circuit associated with the suction pressure
transducer is locked out, it will not defeat the
protection afforded by this diagnostic
Local
Communication Diagnostics
NNootteess::
1. The following communication loss
diagnostics will not occur unless that input
or output is required to be present by the
particular configuration and installed
options for the chiller.
2. Communication diagnostics (with the
exception of “Excessive Loss of Comm” )
are named by the Functional Name of the
input or output that is no longer being heard
from by the Main Processor. Many LLIDs,
such as the Quad Relay LLID, have more
than one functional output associated with it.
A comm loss with such a multiple function
board, will generate multiple diagnostics.
Refer to the chiller's wiring diagrams to
relate the occurrence of multiple
communication diagnostics back to the
physical LLID boards that they have been
assigned to (bound).
Table 28. Diagnostics — communication
Diagnostic
Name
Affects
Target
Severity
Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level
Comm Loss:
AFD 1A
Circuit Immediate NonLatch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 30 second period
Remote
Comm Loss:
AFD 2A
Circuit Immediate NonLatch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 30 second period
Remote
Comm Loss:
Chiller %
Capacity
Output
None Info Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 30 second period
Remote
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Trane Ascend ACR Series Specifications

General

Brand	Trane
Model	Ascend ACR Series
Category	Chiller
Language	English