Trane Optimus RTHD - Main Processor Diagnostics Continued

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RTHD-SVX01L-EN
Table 23. Main processor diagnostics (continued)
Diagnostic Name
Affects
Target
Severity
Persistence
Active Modes
[Inactive Modes]
Criteria
Reset
Level
Compressor
Discharge
Temperature Sensor
Chiller Immediate Latch All Bad Sensor or LLID Remote
Condenser Entering
Water Temp Sensor
Chiller
Warning
and Special
Action
Latch All
Bad Sensor or LLID. If chiller running, and condenser water
regulating valve option installed, force valve to 100% flow.
Remote
Condenser Leaving
Water Temp Sensor
Chiller
Warning
Latch All Bad Sensor or LLID Remote
Condenser
Refrigerant Pressure
Transducer
Chiller Normal Latch All Bad Sensor or LLID Remote
Condenser Water
Flow Lost
Chiller Immediate NonLatch
Start and All Run
Modes
The condenser water flow proof input was open for more
than 6 contiguous seconds after flow had been proven. This
diagnostic is automatically cleared once the compressor is
stopped by a fixed time out of 7 sec. The Cond Pump shall
be commanded off but the Evap pump command will not be
effected.
Remote
Condenser Water
Flow Overdue
Chiller Normal NonLatch
Estab Cond Water
Flow - or for 1st 10
sec after Ignore DP
setting is reached if
Cond Wtr Flow
Proving Ignore is
enabled
Condenser water flow was not proven within 20 minutes of
the condenser pump relay being energized. The Cond
Pump shall be commanded off. Diagnostic is reset with
return of flow (although only possible with external control
of pump). This diagnostic may also occur if Cond Wtr Flow
Proving Ignore is enabled, and flow is not immediately
proven as the Ignore DP setting is reached.
Remote
Emergency Stop
Chiller Immediate Latch All
EMERGENCY STOP input is open. An external interlock
has tripped. Time to trip from input opening to unit stop shall
be 0.1 to 1.0 seconds.
Local
Energy Meter Write
Value Failure
Chiller
Warning
Latch All
The read back value is not equal the written value. It will be
tripped after two retries of write failure. Note: This
diagnostic currently applies to Trane Enercept energy meter
only.
Remote
Evaporator Diff
Water Pressure Xdcr
Chiller
Warning Latching
All
Defective Sensor or LLID
a. Display invalid value
b. Flow calculation shall be disabled.
c. See Water Flow and Tons Sensing specification for
additional information
Remote
Evaporator Entering
Water Temp Sensor
Chiller
Warning
and Special
Action
Latch
Bad Sensor or LLID Normal operation unless CHW Reset is
enabled. If CHW Reset is enabled and either Return or
Constant Return Chilled Water Reset is selected, its effect
will be removed but slew rates on the change will be limited
per the Chilled Water Reset spec.
Remote
Evaporator Leaving
Water Temp Sensor
Chiller Normal Latch All Bad Sensor or LLID Remote
Evaporator Liquid
Level Sensor
Chiller Normal Latch All Bad Sensor or LLID Remote
Evaporator
Refrigerant Pressure
Transducer
Chiller Normal Latch All Bad Sensor or LLID Remote
Evaporator Water
Flow (Entering
Water Temp)
Chiller
Warning
NonLatch
Any Ckt(s)
Energized [No Ckt
(s) Energized]
The entering evaporator water temp fell below the leaving
evaporator water temp. by more than 2°F for 100 °F-sec.
For falling film evaporators this diagnostic cannot reliably
indicate loss of flow, but can warn of improper flow direction
through the evaporator, mis-bound temperature sensors, or
other system problems
Remote
Diagnostics