Diagnostics
RTAF-SVX001K-EN
93
Comm Loss: Electronic Expansion Valve
Comm: EXV
Circuit
Normal
Latch
All
Continual loss of communication between
the MP and the EXV Step Status has
occurred for a 30 second period, OR EXV
Steps Maximum Position has not been
received. If EXV Steps Maximum Position
has not been received, MP will periodically
request EXV Steps Maximum Position,
since it is only transmitted upon request.
Remote
Comm Loss: Emergency Stop Feedback
Input
Comm: Emergency Stop
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: Energy Meter Pulse Input
Comm: Energy Pulse Input
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: Evaporator Entering Water
Pressure
Comm Loss: Evap Entering Water Pressure
Comm: Evap Ent Water Press
Chiller
Info
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: Evaporator Entering Water
Temperature
Comm Loss: Evap Entering Water Temp
Comm: Evap Ent Water Temp
Chiller
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period. Note: Entering
Water Temp Sensor is used in EXV pressure
control as well as ice making & CHW reset,
so it must cause a unit shutdown even if Ice
or CHW reset is not installed.
Remote
Comm Loss: Evaporator Isolation Valve
Close Switch
Comm Loss: Evap Iso Valve Close Switch
Comm: Evap Iso Vlv Close Sw
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: Evaporator Isolation Valve
Open Switch
Comm Loss: Evap Iso Valve Open Switch
Comm: Evap Iso Vlv Open Sw
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: Evaporator Isolation Valve
Relay
Comm Loss: Evap Isolation Valve Relay
Comm: Evap Iso Valve Relay
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: Evaporator Leaving Water
Pressure
Comm Loss: Evap Leaving Water Pressure
Comm: Evap Leav Water Press
Chiller
Info
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Comm Loss: Evaporator Leaving Water
Temperature
Comm Loss: Evap Leaving Water Temp
Comm: Evap Leav Water Temp
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: Evaporator Pump 1 Fault Input
Comm: Evap Pump Fault Input
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: Evaporator Pump 2 Fault Input
Comm: Evap Pump Fault Input
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: Evaporator Pump Inverter 1
Run Command
Comm Loss: Evap Pump Inv 1 Run
Command
Comm: Evap Water Pump Relay
Chiller
Normal
Latch
All
Continual loss of communication between
the MP and the Functional ID has occurred
for a 30 second period.
Remote
Table 34. Communications diagnostics (continued)
Diagnostic Name
Affects
Target
Severity Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level