Communication Diagnostics - Trane R Series Installation, Operation And Maintenance Manual

Diagnostics
Table 67. Main processor diagnostics (continued)
Affects
Diagnostic Name Target Severity
Very Low Evaporator
Refrigerant Pressure Chiller Immediate
- Circuit 2

Communication Diagnostics

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.
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
Table 68. Communication diagnostics
Affects
Diagnostic Name Target Severity
Comm Loss: Chilled
Chiller
Water Flow Switch
Comm Loss: Cond Rfgt
Circuit
Pressure, Circuit #1
Comm Loss: Cond Rfgt
Circuit
Pressure, Circuit #2
Comm Loss: Electronic
Expansion Valve, Circuit Circuit
#1
Comm Loss: Electronic
Expansion Valve, Circuit Circuit
#2
Comm Loss: Emergency
Chiller
Stop
Comm Loss: Evap Oil
Cprsr
Return Valve, Cprsr 1A
Comm Loss: Evap Oil
Cprsr
Return Valve, Cprsr 1B
Comm Loss: Evap Oil
Cprsr
Return Valve, Cprsr 2A
Comm Loss: Evap Oil
Cprsr
Return Valve, Cprsr 2B
Comm Loss: Evaporator Chilled
Entering Water Water
Temperature Reset
Comm Loss: Evaporator
Leaving Water Chiller
Temperature
Comm Loss: Evaporator
Circuit
Rfgt Drain Valve - Ckt 1
Comm Loss: Evaporator
Circuit
Rfgt Drain Valve - Ckt 2
162
Active Modes
Persist- [Inactive
ence Modes]
All
[compressor or
Latch
circuit in manual
lockout]
Active
Modes
Persist- [Inactive
ence Modes]
Immediate Latch All
Immediate Latch All
Immediate Latch All
Normal Latch All
Normal Latch All
Normal Latch All
Normal Latch All
Normal Latch All
Normal Latch All
Normal Latch All
Special
Latch All
Mode
Normal Latch All
Normal Latch All
Normal Latch All
Criteria
The evaporator pressure dropped below 8 psia (or 5 psia in sftw
prior to Oct '02) regardless of whether or not compressors are
running on that circuit. This diagnostic was created to prevent
compressor failures due to crossbinding by forcing an entire
chiller shutdown. If a given compressor or circuit is locked out,
the suction pressure transducer(s) associated with it, will be
excluded from causing this diagnostic.
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).
Criteria
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Chiller shall
remove any Return or Constant Return Chilled Water Reset, if it
was in effect. Apply slew rates per Chilled Water Reset spec.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Reset
Level
Local
Reset
Level
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
RTAC-SVX01J-EN