Trane CCAF User Manual

74 CGWF-SVX01A-EN
Diagnostics
Current L1 Loss Immediate Latch No current was sensed on the current transformer L1 input while
starting or running. Time to trip shall be longer than guaranteed reset
on Starter Module at a minimum, 3 seconds maximum. Actual design
trip point is 10%. The actual design trip time is 2.64 seconds. If Phase
reversal protection is enabled and current is not sensed on one or
more current xformer inputs. Logic will detect and trip in a maximum
of 0.3 second from compressor start.
Local
Current L2 Loss Immediate Latch Same as Current L1 Loss except L2 input. Local
Current L3 Loss Immediate Latch Same as Current L1 Loss except L3 input. Local
Discharge Pressure
Transducer
Normal Latch Bad Sensor or LLID Remote
Emergency Stop Immediate Latch Emergency Stop input is open. Local
Evaporator Entering Water
Temp Sensor
Normal Latch Bad Sensor or LLID. Remote
Evaporator Leaving Water
Temp Sensor
Normal Latch Bad Sensor or LLID Remote
Evaporator Water Flow Lost Immediate NonLatch After flow had been proven the chilled water flow input was open for
more than 6 continuous seconds. The evaporator pump shall be
commanded on until the diagnostic clears even if the chiller is in STOP.
6-10 seconds of continuous flow shall clear this diagnostic. Some
customers use the pump to control the chiller.
Remote
Evaporator Water Flow
Overdue
Immediate NonLatch Evaporator water flow was not proven within 20 minutes of the
evaporator water pump relay being energized. The evaporator water
pump relay will remain energized to support installations where the
evaporator water pump is turned off to shut down the chiller.
Diagnostic is reset with return of evaporator water flow.
Remote
External Chilled Water
Setpoint
Warning NonLatch 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). This Warning diagnostic will
automatically reset if the input returns to the normal range.
Remote
High Evaporator Water
Temperature
Immediate NonLatch The evaporator leaving water temperature is above 115°F. This
diagnostic shall clear once the evaporator leaving water temperature
falls below 110°F. This diagnostic protects the rupture disk and plastic
baffles in the evaporator. The evaporator water pump shall not run
when this diagnostic is active.
Local
High Motor Temp/Overload
Tri p C p rs r A
Immediate Latch The High Motor Temperature or the Compressor Overload switch
input is open for compressor A.
Local
High Motor Temp/Overload
Tri p C p rs r B
Immediate Latch The High Motor Temperature or the Compressor Overload switch
input is open for compressor B.
Local
High Pressure Cutout Immediate Latch The high pressure cutout switch was open for more than three
seconds. The high pressure cutout switch for R22 used on this
machine is an open at 405 PSIG and a close at 300 PSIG.
Local
Low Evap Leaving Water
Temp: Unit Off
Warning
and
Special
Action
NonLatch The leaving chilled water temperature fell below the leaving water
temp cutout setting for 30 degree F seconds while the Chiller is in the
Stop mode, or in Auto mode with no compressors running. Energize
Evap Water pump Relay until diagnostic auto resets, then return to
normal evap pump control. Automatic reset occurs when the temp
rises 2°F above the cutout setting for 30 minutes. When this
diagnostic is active AND Leaving Water Temperature sensor
diagnostic (loss of comm or out of range) the Evap Water pump relay
shall be de-energized.
Remote
Low Evap Leaving Water
Temp: Unit On
Immediate
and
Special
Action
NonLatch The chilled water temp. fell below the cutout setpoint for 30 degree F
Seconds while the compressor was running. Automatic reset occurs
when the temperature rises 2 °F above the cutout setting for 2
minutes. This diagnostic shall not de-energize the Evaporator Water
Pump Output. If this diagnostic is active the Low Evap Leaving Water
Temp: Unit Off diagnostic shall be suppressed.
Remote
Low Pressure Cutout Immediate Latch · The low suction refrigerant pressure diagnostic occurred more than
five times during a given demand period or failed to reset in 60
seconds after opening when either compressor A or B were running
and the unit was not in a Service Pumpdown or Operational
Pumpdown.
Local
Low Suction Refrigerant
Pressure
Immediate NonLatch The pressure status, described in the Low Suction Refrigerant
Pressure Protection specification, was opened. This diagnostic will
clear when the status goes closed.
Local
Diagnostic Name Severity Persistence Criteria Reset
Level

Trane CCAF Specifications

General

Brand	Trane
Model	CCAF
Category	Chiller
Language	English