Trane CCUN 205-211 User Manual Page 29

Chiller control system.
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Diagnostic Name
Excessive Loss of Comm
Comm Loss:
External Auto/Stop
Comm Loss:
Emergency Stop
Comm Loss:
Ext Ice Building Ctrl Input
Comm Loss:
Outdoor Air Temperature
Comm Loss:
Evap Leaving Water Temp
Comm Loss:
Evap Entering Water Temp
Comm Loss:
Condenser Leaving Water
Temp
Comm Loss:
Condenser Entering Water
Temp
Comm Loss:
Discharge Pressure
Transducer
CG-SVU02B-E4
Diagnostics
Table 6 - Communication Diagnostics
Notes:
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.
Effects
Severity
Persistence
Chiller
Immediate
Latch
Chiller
Normal
Latch
Chiller
Normal
Latch
Chiller
Warning
Latch
Chiller
Warning
Latch
Chiller
Normal
Latch
Chiller
Normal
Latch
Chiller
Warning
Latch
Chiller
Warning
Latch
Circuit
Normal
Latch
Active
Criteria
Modes
[Inactive
Modes]
All
Loss of comm with 20% or more of the llids configured for the
system has been detected. This diagnostic will suppress the
callout of all subsequent comm loss diagnostics. Check power
supply(s) and power disconnects - troubleshoot LLIDS buss
using TechView
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period.
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period.
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.
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period. If
configured as an air-cooled this diagnostic shall turn on all fans
and use a minimum LPC ignore time of 30 seconds.
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period.
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period.
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period.
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period.
All
Continual loss of communication between the MP and the
Functional ID has occurred for a 35-40 second period.
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).
Reset
Level
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
29

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