Ingersoll-Rand Trane Ascend ACS, Installation, Operation And Maintenance Manual

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80 AC-SVX002C-EN
Communication Diagnostics
N No otte ess::
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 “Programmable Annunciation
Relay modules) 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 33. Communication diagnostics
Diagnostic
Name
Affects
Target
Severity
Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level
Comm Loss:
External Auto/
Stop
Chiller Normal Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period.
Remote
Comm Loss:
Emergency
Stop
Chiller Normal Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period.
Remote
Comm Loss:
External Ice
Building
Command
Chiller
Warning
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period. Chiller shall revert to normal (non-ice
building) mode regardless of last state.
Remote
Comm Loss:
Outdoor Air
Temperature
Chiller Normal Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period.
Remote
Comm Loss:
Evap Leaving
Water Temp
Chiller Normal Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period.
Remote
Comm Loss:
Evap Entering
Water Temp
Chiller Normal Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period.
Remote
Comm Loss:
Discharge
Pressure
Transducer
Circuit Immediate Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period.
Remote
Comm Loss:
Suction
Pressure
Transducer
Circuit Immediate Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period.
Remote
Comm Loss:
Ext Chilled/Hot
Water Setpoint
Chiller
Warning and
Special Action
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period. Chiller shall discontinue use of the External
Chilled/Hot Water Setpoint source and revert to the
next higher priority for setpoint arbitration
Remote
Comm Loss:
Ext Demand
Limit Setpoint
Chiller
Warning and
Special Action
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period. Chiller shall discontinue use of the External
Demand Limit Setpoint source and revert to the next
higher priority for setpoint arbitration
Remote
Comm Loss:
Auxiliary
Setpoint
Command
Chiller
Warning and
Special Action
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period. Chiller shall discontinue use of the Auxiliary
Setpoint and revert to the Chilled Water Setpoint
based on setpoint arbitration
Remote
D Diia ag gn no ossttiiccss