Trane RTAF-SVX001K-EN - Page 83

Diagnostics
RTAF-SVX001K-EN 83
Evaporator Isolation Valve Open Switch
Failure
Evap Isolation Valve Open Switch Failure
Evap Iso Vlv Open Sw Fail
Circuit Immediate Latch All
Evaporator isolation valve closed limit
switch state does not match expected
value. See Evaporator Isolation Valve spec
for details.
Local
Evaporator Leaving Water Pressure
Evap Leaving Water Pressure
Chiller Info Latch All Bad Sensor or LLID Remote
Evaporator Leaving Water Temperature
Sensor
Evaporator Leaving Water Temp Sensor
Evap Leav Water Temp Sensor
Chiller Normal Latch All Bad Sensor or LLID Remote
Evaporator Pump 1 Fault Chiller
Immediate
or Warning
and Special
Action
NonLatch All
For systems with no evaporator pump, a
single evaporator pump, or a single
inverter driving dual evaporator pumps, an
immediate shutdown shall be performed.
For multiple pump systems, detection of a
pump fault will generally cause pump
control to switch to the redundant pump.
For single inverter, dual pump
configuration, switching to the redundant
pump can only happen after the fault is
cleared. Specific details of special action
are described in
Evaporator_Water_Pump_Control.doc
Remote
Evaporator Pump 2 Fault Chiller
Immediate
or Warning
and Special
Action
NonLatch All
For systems with no evaporator pump, a
single evaporator pump, or a single
inverter driving dual evaporator pumps, an
immediate shutdown shall be performed.
For multiple pump systems, detection of a
pump fault will generally cause pump
control to switch to the redundant pump.
For single inverter, dual pump
configuration, switching to the redundant
pump can only happen after the fault is
cleared. Specific details of special action
are described in
Evaporator_Water_Pump_Control.doc
Remote
Evaporator Refrigerant Pool Temperature
Sensor Error
Evap Rfgt Pool Temp Sensor Error
Evap Pool Temp Error
Circuit
Warning
and Special
Action
Latch
Ckt Energized
[Ckt Not
Energized]
The evaporator refrigerant pool
temperature measurement is larger than
the evaporator entering water
temperature by more than 4°C (7.2°F) for
5 continuous minutes. There is an ignore
time of 2 minutes following circuit startup.
The trip criteria is not evaluated (and time
above the threshold is not counted) until
the ignore time passes. Invalidate
evaporator pool temperature sensor
measurement if this diagnostic is active. If
evaporator isolation valves are installed,
revert to Evaporator Shell Refrigerant
Saturated Temperature for freeze
protection functions. If evaporator
isolation valves are not installed, revert to
Evaporator Saturated Temperature for
freeze protection functions. Pool Temp
Sensor may have failed due to incorrect
installation, improper insulation, or an
offset pool temperature measurement
typically caused by moisture intrusion.
Local
Table 33. Main processor diagnostics (continued)
Diagnostic Name
Affects
Target
Severity Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level