Trane Ascend ACS 140 Installation, Operation And Maintenance Manual page 76

D D i i a a g g n n o o s s t t i i c c s s
Table 29. Main process diagnostics (continued)
Affects
Diagnostic
Target
Name
Evaporator
Pump 2 Starts/ Chiller
Hours Modified
Evaporator
Water Flow
Chiller
Lost
Evaporator
Water Flow Chiller
Lost Lockout
Evaporator
Water Flow Too Chiller
Low
Evaporator
Water Flow Chiller
Overdue
Evaporator
Water Flow
Chiller
Lost – Pump 1
Evaporator
Water Flow
Chiller
Lost – Pump 2
Evaporator
Water Flow
Chiller
Overdue –
Pump 1
Evaporator
Water Flow
Chiller
Overdue –
Pump 2
Evaporator
Chiller
Pump 1 Fault
76
Severity
Persistence
Warning
NonLatch
Immediate and
NonLatch
Special Action
Immediate Latch
Immediate Latch
Immediate and
NonLatch
Special Action
Warning and
NonLatch
Special Action
Warning and
NonLatch
Special Action
Warning and
NonLatch
Special Action
Warning and
NonLatch
Special Action
Immediate or
Warning and
NonLatch
Special Action
Active
Modes
[Inactive
Modes]
A counter for evaporator pump 2 starts or hours has
been manually modified. This diagnostic is
All
immediately and automatically cleared and thus can
only be seen in the historic diagnostic list.
After the pump request was activated, water flow
was established and then lost. Special action is to
All keep the evap pump request active in a diagnostic
override mode. See Evaporator Water Flow
Protection for more details.
Four (4) water flow loss events occurred in a moving
4 day time window. Corrective action is needed to
All
identify and eliminate the cause. See Evaporator
Water Flow Protection for more details.
Refrigerant side to water side heat balance indicates
Cooling Mode
that water flow has dropped below allowable
[Not Cooling
manufacturer limits. See Evaporator Water Flow
Mode]
Estimation for more details.
After the pump request was activated, the
evaporator water flow overdue wait time elapsed
before water flow was established. Special action is
All
to keep the evap pump request active in a diagnostic
override mode. See Evaporator Water Flow
Protection for more details.
For dual evaporator pump configurations only.
Evaporator Water Flow Lost diagnostic occurred
while Pump 1 was the selected pump. Specific details
All
of special action are described in Evaporator_Water_
For dual evaporator pump configurations only.
Evaporator Water Flow Lost diagnostic occurred
while Pump 2 was the selected pump. Specific details
All
of special action are described in Evaporator_Water_
For dual evaporator pump configurations only.
Evaporator Water Flow Overdue diagnostic occurred
while Pump 1 was the selected pump. Specific details
All
of special action are described in Evaporator_Water_
For dual evaporator pump configurations only.
Evaporator Water Flow Overdue diagnostic occurred
while Pump 2 was the selected pump. Specific details
All
of special action are described in Evaporator_Water_
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
All
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.
Criteria
Pump_Control.
Pump_Control.
Pump_Control.
Pump_Control.
AC-SVX002D-EN
Reset
Level
NA
Remote
Local
Local
Remote
Remote
Remote
Remote
Remote
Remote