Trane Optimus RTHD Installation, Operation And Maintenance Manual page 77

Table 26. Main processor diagnostics (continued)
Diagnostic
Name and Affects
Source Target Severity
Evap Water Flow
(Entering Water Chiller Warning
Temp)
Evaporator Diff
Water Pressure Chiller Warning
Xdcr
Evaporator Warning
Entering Water Chiller and Special
Temp Sensor Action
Evaporator
Leaving Water Chiller Normal
Temp Sensor
Evaporator
Liquid Level Chiller Normal
Sensor
Evaporator Rfgt
Pressure Chiller Normal
Transducer
Evaporator
Chiller Immediate NonLatch
Water Flow Lost
Evaporator
Water Flow Chiller Normal
Overdue
Excessive
Condenser Chiller Immediate Latch
Pressure
Info and
External Base
Chiller Special
Loading Setpoint
Action
External Chilled/
Hot Water Chiller Warning
Setpoint
External
Demand Limit Chiller Warning
Setpoint
External Heat
Recovery Tank
Heat
Water Warning
Recovery
Temperature
Setpoint Input
RTHD-SVX01K-EN
Active Modes
[Inactive
Persistence Modes]
Any Ckt(s)
NonLatch Energized [No
Ckt(s) Energized]
Latching All
Latch
Latch All
Latch All
Latch All
Evap pump
commanded "on"
except for [All Stop
modes]
Estab. Evap. Water
NonLatch Flow on going from
STOP to AUTO.
All
NonLatch All
NonLatch All
NonLatch All
NonLatch All
Criteria
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
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.
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.
Bad Sensor or LLID
Bad Sensor or LLID
Bad Sensor or LLID
The Evaporator water flow proof input was open for more
than 6-10 contiguous seconds after flow had been proven.
The pump command status will not be effected. Even
though the pump may be commanded to run in the STOP
modes (pump off delay time), this diagnostic shall not be
called out in the STOP modes. This diagnostic will auto-
clear on proof of flow (6-10 seconds of continuous flow),
or if chiller is returned to Stop mode.
Evaporator water flow was not proven within 20 minutes of
the Evaporator water pump relay being energized. The
Evap pump command status will not be effected. This
diagnostic will auto-clear on proof of flow (6-10 seconds of
continuous flow), or if chiller is returned to Stop mode.
The condenser pressure transducer of this chiller has
detected a pressure in excess of the safe high side pressure
as limited by the particular compressor type or the
evaporator distributor present on this particular chiller.
a. Not ""Enabled"": no diagnostics. b. ""Enabled "": Out-
Of-Range Low or Hi or bad LLID, set diagnostic, default
BLS to next level of priority (e.g. Front Panel SetPoint. This
Info diagnostic will automatically reset if the input returns
to the normal range.
a. Function Not "Enabled": no diagnostics. b. "Enabled":
Out-Of-Range Low or Hi or bad LLID, set diagnostic,
default CWS to next level of priority (e.g. Front Panel
SetPoint). This Info diagnostic will automatically reset if
the input returns to the normal range.
a. Not "Enabled": no diagnostics. b. "Enabled": Out-Of-
Range Low or Hi or bad LLID, set diagnostic, default DLS
to next level of priority (e.g. Front Panel SetPoint. This Info
diagnostic will automatically reset if the input returns to
the normal range.
Bad Sensor or LLID.
Diagnostics
Reset
Level
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
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