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AC-SVX003A-EN
Table 32. Diagnostics — communication (continued)
Diagnostic
Name
Affects Target Severity
Persistence
Active Modes
[Inactive
Modes]
Criteria
Reset
Level
Comm Loss: Oil
Return Valve - xy
Circuit Normal Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Design
Note: this diagnostic is intended for the GP4 compressors
only (Cprsrs 1A and 2A). Some consideration was given to
making this a circuit shutdown since without the valve, the
GP4 oil return cannot work properly, and if the GP4 can’t
run, neither can its manifolded GP2 - but if the valve is open
somewhere between its min and max, the circuit may be
able to run reasonably well – and other diagnostics can
protect against oil loss, or low disch SH, or lack of drive
cooling that may result.
Remote
Comm Loss: Oil
Supply
Temperature
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:
Outdoor Air
Temperature
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:
Programmable
Relay Board 1
Chiller
Warning
Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Remote
Comm Loss:
Programmable
Relay Board 2
Chiller
Warning
Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Remote
Comm Loss:
Slide Valve Load
- 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:
Slide Valve
Unload - 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:
Starter xy
Cprsr
Immediate Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Local
Comm Loss:
Step Load - 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:
Suction
Refrigerant
Pressure - xy
Cprsr
Immediate Latch
All
[Ckt/Cprsr lock
out]
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Remote
Comm Loss:
Variable Vi Valve
- CprsrXY
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: %
RLA Indication
Output(Vdc)
Chiller
Warning
Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Remote
Comm Loss:
Auxiliary Setpoint
Command
Chiller
Warning
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
Refrigerant
Temperature - 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
Circuit Normal Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Remote
Diagnostics
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