Diagnostics
RTHD-SVX01K-EN 83
Comm Loss: Economizer
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: Economizer
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: Electronic
Expansion Valve 1
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: Electronic
Expansion Valve 2
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: 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: Evap Diff
Water Pressure
Chiller Warning Latching All
Continual loss of communication between the MP and
the Functional ID has occurred for a 35-40 second
period. Flow and tons calculation shall be disabled.
Display invalid value.
Remote
Comm Loss: Evap Entering
Water Temp
Chiller
Warning
and Special
Action
Latch All
"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."
Remote
Comm Loss: Evap Leaving
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
Rfgt Liquid Level
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
Rfgt Pressure
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
Water Flow Switch
Chiller 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
Water Pump Relay
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: Ext Base
Loading Command
Chiller
Warning
and Special
Action
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 30 second
period. The external base load input is removed from
the arbitration to enable Base Loading.
Remote
Comm Loss: Ext Base
Loading Setpoint
Chiller
Wa
rning
and Special
Action
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 30 second
period. The external base load setpoint input is
removed from the arbitration to establish the Base
LoadingSetpoint.
Remote
Comm Loss: Ext Chilled/Hot
Water Setpoint
Chiller
Warning
and Special
Action
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 30 second
period. Chiller shall discontinue use of the External
Chilled Water Setpoint source and revert to the next
higher priority for setpoint arbitration
Remote
Comm Loss: External Auto/
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: External
Demand Limit Setpoint
Chiller
Warning
and Special
Action
Latch All
Continual loss of communication between the MP and
the Functional ID has occurred for a 30 second
period. Chiller shall discontinue use of the External
Demand limit setpoint and revert to the next higher
priority for Demand Limit setpoint arbitration
Remote
Table 27. Communication diagnostics (continued)
Diagnostic Name Affects Severity Persistence
Active
Modes
[Inactive
Modes] Criteria
Reset
Level
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