Diagnostics
92
RTAF-SVX001K-EN
Communication Diagnostics
Notes:
•
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 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).
•
Communication loss diagnostics shall be timed based
on action (target status) and not annunciation on the
operator display.
Table 34. Communications diagnostics
Diagnostic Name
Affects
Target
Severity Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level
Comm Loss: %RLA Indication Output (Vdc)
Comm: RLA Output
None
Info
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 15-30 second period.
Remote
Comm Loss: Liquid Line Pressure
Comm: Liquid Line Pressure
Circuit
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: Oil Temperature - xy
Comm: Oil Temp - xy
Cprsr
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: AFD Fault Input xA
Comm: AFD Fault xA
Cprsr
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: AFD Run Command - xA
Comm: AFD Run Command - xA
Cprsr
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: AFD Speed Command - xA
Comm: Speed Command -xA
Cprsr
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 15-30 second period.
Remote
Comm Loss: Auxiliary Setpoint Command
Comm: Auxiliary Setpt Cmd
Chiller
Info
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 15-30 second period.
Remote
Comm Loss: Chiller Bypass Valve Output
Comm: Chiller Bypass Valve
Chiller
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: Compressor Discharge Rfgt
Temperature - xy
Comm Loss: Cprsr Disch Rfgt Temp - xy
Comm: Cprsr Disch Temp xy
Cprsr
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: Condenser Fan Enable Comm:
Cond Fan Enable
Circuit
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: Condenser Fan Enable,
Shared Circuit 1&2
Comm Loss: Cond Fan Enbl Shared Ckt1&2
Comm: Cond Fan Enbl Ckt 1&2
Circuit
Info
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period. This is an info
warning, as it is conceivable that the circuit
may run without the center shared fan
deck working if there are many other coils/
fans on the circuits.
Remote
Comm Loss: Condenser Refrigerant
Pressure
Comm Loss: Condenser Rfgt Pressure
Comm: Cond Rfgt Pressure
Circuit Immediate
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: Condenser Refrigerant Tank
Valve
Comm Loss: Cond Rfgt Tank Valve
Comm: Cond Rfgt Tank Vlv
Circuit
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
