106
AC-SVX003A-EN
Table 31. Diagnostics — main processor (continued)
Diagnostic
Name
Affects Target Severity
Persistence
Active Modes
[Inactive
Modes]
Criteria
Reset
Level
Evaporator
Water Flow
Overdue
Chiller Normal NonLatch
Unit in Stop
Mode, or in Auto
Mode and No Ckt
(s) Energized
[Any Ckt
Energized]
Evaporator water flow was not proven within 20 minutes of
the Evaporator water pump relay being energized in normal
“Stop” to “Auto” transition. If the pump is overridden to “On”
for certain diagnostics, the delay on diagnostic callout shall
be only 255 seconds. The pump command status will not be
effected by this diagnostic in either case.
Remote
Evaporator
Water Pump
Fault
Chiller Immediate NonLatch All
For systems with a single variable-speed evaporator pump,
an immediate shutdown shall be performed, see
Evaporator_Water_Pump_Control.doc
Remote
Evaporator
Water Pump
Speed Feedback
Chiller
Warning
Latch All Bad Sensor or LLID Remote
Excessive
Condenser
Pressure
Circuit Immediate Latch All
The condenser pressure sensor of this circuit has detected
a condensing pressure in excess of the design high side
pressure as limited by the particular compressor type.
Remote
External Chilled
Water Setpoint
Chiller
Warning
Latch All
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).
Remote
External Demand
Limit Setpoint
Chiller
Warning
Latch All
A. Not "Enabled": no diagnostics.
B. "Enabled ": Out-Of-Range Low or Hi or bad LLID, set
diagnostic, default CLS to next level of priority (e.g. Front
Panel SetPoint.)
Remote
Fan Inverter
Fault
Circuit
Warning
NonLatch All
A fault signal has been detected from at least one of the
Variable Speed Inverter Drive Condenser Fans of Circuit 1
or 2 (including the right hand fan of the Shared Fan Module
if present).
Starting in build after 4/5/2023, the fault signal must be
faulted for at least 150sec (adjustable) continuously before
this diagnostic is triggered.
No action is taken.
Remote
Free Cooling
Dedicated Fan
Inverter Fault
Free Cooling Warning
NonLatch All
A fault signal has been detected from at least one of the
Free Cooling Dedicated Fan Variable Speed Inverter Drive.
Starting in build after 4/5/2023, the fault signal must be
faulted for at least 150sec (adjustable) continuously before
this diagnostic is triggered.
No action is taken.
Remote
Free Cooling
Entering Water
Temperature
Free
Cooling
Normal Latch All Bad Sensor or LLID. Remote
High
Compressor
Refrigerant
Discharge Temp
- xy
Cprsr
Immediate Latch
All
[compressor run
unload or
compressor not
running]
The compressor discharge temperature exceeded 199.4°F
(without oil cooler) or 230°F (with oil cooler). This diagnostic
will be suppressed during Stopping mode or after the
compressor has stopped. Note: As part of the Compressor
High Temperature Limit Mode (aka Minimum Capacity
Limit), the compressor shall be forced loaded as the filtered
discharge temperature reaches 190°F (without oil coolers),
or 220°F (with oil coolers).
Remote
High Differential
Refrigerant
Pressure - xy
Cprsr
Normal Latch
Cprsr Energized
GP2 Cprsr: The differential pressure for the respective
circuit was above 275 Psid (1890 kPa) for 2 consecutive
samples 5 seconds apart.
Remote
Diagnostics
To Next Page
Loading...
Need help?
General