Diagnostics
RTAF-SVX001K-EN
85
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
Ext Chilled Wtr Setpt
Chiller
Info
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
Ext Demand Limit Setpoint
Chiller
Info 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
EXV Pressure Equalization Failed
EXV Press Equalization Fail
Circuit Immediate
Latch
All
EXV Pressure Equalization process failed
to meet the equalization criteria within the
allotted time.
Remote
Free Cooling Entering Water
Temperature
FC Entering Water Temp
Free
Cooling
Normal
Latch
All
Bad Sensor or LLID
Remote
Heat Recovery Entering Water
Temperature Sensor
Heat Recovery Entering Water Temp
Sensor
Heat Rcvry Ent Water Temp
Chiller
Info
Latch
All
Bad Sensor or LLID
Remote
Heat Recovery Leaving Water
Temperature Sensor
Heat Recovery Leaving Water Temp
Sensor
Heat Rcvry Leav Water Temp
Chiller
Info
Latch
All
Bad Sensor or LLID
Remote
High Compressor Refrigerant Discharge
Temp - xy
High Cprsr Rfgt Discharge Temp - xy
High Cprsr Disch 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
230ºF (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 190ºF (without oil
coolers), or 220ºF (with oil coolers).
Remote
High Differential Refrigerant
Pressure - xy
High Differential Rfgt Pressure - xy
High Diff Rfgt 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
High Evaporator Refrigerant Pressure
High Evap Rfgt Pressure
Chiller Immediate
NonLatch
All
The evaporator refrigerant pressure of
either circuit has risen above 190 psig. The
evaporator water pump relay will be de-
energized to stop the pump regardless of
why the pump is running. The diagnostic
will auto reset and the pump will return to
normal control when all of the evaporator
pressures fall below 185 psig. The primary
purpose is to stop the evaporator water
pump and its associated pump heat from
causing refrigerant side pressures, close to
the evaporator relief valve setting, when
the chiller is not running, such as could
occur with Evap Water Flow Overdue or
Evaporator Water Flow Loss Diagnostics.
Remote
Table 33. Main processor diagnostics (continued)
Diagnostic Name
Affects
Target
Severity Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level