AC-SVX001A-EN
91
Table 27. Diagnostics — main processor (continued)
Diagnostic
Name
Affects
Target
Severity
Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level
High Discharge
Temperature –
Cprsr1A
Circuit Immediate Latch
All
[compressor
run unload or
compressor not
running]
The compressor discharge temperature exceeded
200°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 Discharge
Temperature –
Cprsr2A
Circuit Immediate Latch
All
[compressor
run unload or
compressor not
running]
The compressor discharge temperature exceeded
200°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
Evaporator
Refrigerant
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
High
Evaporator
Water
Temperature
Chiller
Info and
Special Action
NonLatch
Only effective if
either 1)Evap
Wtr Flow
Overdue, 2)
Evap Wtr Flow
Loss, or 3)Low
Evap Rfgt
Temp,-Unit Off,
diagnostic is
active.
Either the leaving or the entering water temperature
exceeded the high evap water temp limit (TV service
menu settable –default 105F) for 15 continuous
seconds. The evaporator water pump relay will be
de-energized to stop the pump but only if it is
running due one of the diagnostics listed on the left .
The diagnostic will auto reset and the pump will
return to normal control when both the entering and
leaving temperatures fall 5F below the trip setting.
The primary purpose is to stop the evaporator water
pump and its associated pump heat from causing
excessive waterside temperatures and waterside
pressures when the chiller is not running but the
evap pump is on due to either Evap Water Flow
Overdue, Evaporator Water Flow Loss , or Low Evap
Temp – Unit Off Diagnostics. This diagnostic will not
auto clear solely due to the clearing of the enabling
diagnostic
Remote
High Motor
Winding
Temperature -
Cprsr1A
Circuit Immediate Latch All
Any of the compressor’s motor winding temperature
sensors is seen to be beyond the windings rated
temperature of 265°F (129.4°C)
Local
High Motor
Winding
Temperature -
Cprsr2A
Circuit Immediate Latch All
Any of the respective compressor’s motor winding
temperature sensors is seen to be beyond the
windings rated temperature of 265°F (129.4°C)
Local
High Pressure
Cutout -
Cprsr1A
Circuit Immediate Latch All
A high pressure cutout was detected by AFD 1A Gate
Kill Input ; trip at 315 ± 5 PSIG
Local
DDiiaaggnnoossttiiccss
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