Trane CGAM Installation & Operation Manual page 142

Diagnostics
Table 78. Main processor diagnostics (continued)
Fault Detected: Evaporator Water Pump 2
Fault Detected: Evaporator Water Pump 2
Fault: Evap Water Pump
High Compressor Pressure Differential
High Compressor Pressure Differential
High Cprsr Press Diff
High Discharge Refrigerant Pressure
High Discharge Refrigerant Pressure
High Discharge Rfgt Press
High Discharge Temperature
High Discharge Temperature
High Discharge Temperature
High Discharge Temperature Lockout
High Discharge Temperature Lockout
High Discharge Temp Lockout
High Evaporator Water Temperature
High Evaporator Water Temperature
High Evap Water Temperature
High Pressure Cutout
High Pressure Cutout
High Pressure Cutout
142
Normal
Immediate
or Warning
Chiller NonLatch
and
Special
Action
Circuit Immediate Latch
Circuit Immediate Latch
Circuit Immediate NonLatch
Circuit Immediate Latch
Info and
Chiller Special NonLatch
Action
Circuit Immediate Latch
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 switch to the redundant pump. For single
inverter, dual pump configuration, switching
All
to the redundant pump can only happen
after the fault is cleared.
no evaporator pump or a single evaporator
pump, a normal shutdown shall be
performed. For multiple pump systems,
detection of a pump fault will generally
cause pump control to switch to the
redundant pump.
Ckt Energized
[Ckt Not
Compressor involute pressure differential
Energized or
exceeded allowable limits.
Operational
Pumpdown]
Discharge pressure exceeded the high
pressure cutout setpoint + 100 kPa. Likely
All cause: failed or incorrectly set high pressure
cutout switch. Prevents release of
refrigerant through relief valve.
Ckt Energized
The discharge temperature exceeded the
[Ckt Not
limits for the compressor.
Energized]
5 high discharge temperature diagnostics
All
occurred over 210 minutes.
The leaving water temperature exceeded
the high evap water temp setting (TV service
menu settable– default 55.0°C (131°F)) for 15
continuous seconds. The evaporator water pump
relay will be de-energized to stop the pump, but
only if it is running due to one of the diagnostics
Only effective if
listed on the left. The diagnostic will auto reset and
either
the pump will return to normal control when the
1) Evaporator
temperature falls 2.778°C (5 F) below the trip
Water Flow
setting. The primary purpose is to stop the
Overdue,
evaporator water pump and its associated pump
2) Evaporator
heat from causing excessive water-side
Water Flow Lost,
temperatures and water-side pressures when the
3) Low Evap
unit is not running but the evap pump is on due to
Water Temp:
either Evaporator Water Flow Overdue,
Unit Off,
Evaporator Water Flow Lost , or Low Evap Water
diagnostic is
Temp – Unit Off diagnostics. This diagnostic will
active.
not auto clear solely due to the clearing of the
enabling diagnostic.
*at unit installation, especially reversible
units, high evap water temp setting will need
to be written. The value should be
approximately 65.556°C (150°F) for heat
pumps
The high pressure cutout switch recognized
All
a high pressure.
Remote
For systems with
Local
Local
Local
Remote
Local
CG-SVX17E-EN