Installation and Maintenance Manual

Diagnostics
RTAE-SVX001B-EN 85
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 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 34. Communication diagnostics
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
Comm Loss: Cond
Fan Enable, Shared
Ckt1&2
None 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: Cond
Rfgt Pressure, Ckt1
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: Cond
Rfgt Pressure, Ckt2
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 Fan
Enable, Ckt1
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, Ckt2
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:
Discharge
Temperature, Ckt1
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:
Discharge
Temperature, Ckt2
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: Drive
Cooling BP Valve,
Ckt1
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: Drive
Cooling BP Valve,
Ckt2
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: Drive
Cooling IL Valve,
Ckt1
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: Drive
Cooling IL Valve,
Ckt2
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: Drive
Cooling Sply Temp,
Ckt1
Circuit Norma Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. While this
diagnostic is active, the associated Drive Cooling ByPass
Valve shall be commanded fully closed.
Remote
Comm Loss: Drive
Cooling Sply Temp,
Ckt2
Circuit Norma Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. While this
diagnostic is active, the associated Drive Cooling ByPass
Valve shall be commanded fully closed
Remote