Diagnostics
82 RTAF-SVX001A-EN
Comm Loss: Evaporator
Water Pump Inverter
Speed
Comm Loss: Evap Water
Pump Inverter Speed
Comm: Evap Water Pump
Speed
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: Ext Noise
Reduction Request
Comm: Ext Noise Reduct
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: External
Auto/Stop
Comm: 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
Chilled Water Setpoint
Comm Loss: Ext Chilled
Water Setpoint
Comm: Ext Chilled Wtr
Setpt
External
Chilled
Water
Setpoint
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 Ckt
Lockout
Comm Loss: External Ckt
Lockout
Comm: Ext Ckt Lockout
Circuit
Special
Action
Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. MP will
nonvolatile hold the lockout state (enabled or disabled) that
was in effect at the time of comm loss.
Remote
Comm Loss: External
Demand Limit Setpoint
Comm Loss: Ext Demand
Limit Setpoint
Comm: Ext Demand Lim
Setpt
External
Demand
Limit
setpoint
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
Comm Loss: External Ice
Building Command
Comm: Ext Ice Building
Cmd
Ice
Making
Mode
Special
Action
Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Chiller shall
revert to normal (non-ice building) mode regardless of last
state.
Remote
Comm Loss: Fan Board 1
Relay X
Comm: Fan Board 1 Relay
X
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: Fan Board 2
Relay X
Comm: Fan Board 2 Relay
X
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: Fan Inverter
Speed Command
Comm: Fan Inverter
Speed Cmd
Circuit 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: Fan Inverter
Speed Command, Shared
Circuit 1 & 2
Comm Loss: Fan Inv Spd
Cmd, Shrd Ckt 1&2
Comm: Fan Inv Spd Cmd
Ckt 1&2
Circuit Info Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 15-30 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: Heat
Recovery Entering Water
Temperature Sensor
Comm Loss: HR Entering
Water Temp Sensor
Comm: HR Entering
Water Temp
Chiller Info Latch All
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.
Remote
Table 28. Communications diagnostics (continued)
Diagnostic Name
Affects
Target Severity Persistence
Active
Modes
[Inactive
Modes] Criteria
Reset
Level
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