Trane Tracer CH530 User Manual page 40

Affects
Diagnostic Name
Target
Low Evaporator Evap (and
Temp - Ckt 1: Unit
circ) Pump
Off
Low Evaporator Evap (and
Temp - Ckt 2: Unit
circ) Pump
Off
Low Evaporator Chiller
Water Temp: Unit On
Evaporator Water Chiller
Flow Overdue
Evaporator Water Chiller
Flow Lost
40
Main Processor Diagnostics
Active Modes
Severity Persistence
[Inactive Modes]
Special Unit in Stop Mode, or
Action in Auto Mode and No
Ckt's Energzd [Any
Ckt Energzd]
NonLatch
Special Unit in Stop Mode, or
Action in Auto Mode and No
Ckt's Energzd [Any
Ckt Energzd]
NonLatch
Immediate Any Ckt[s] Energzd
and Special [No Ckt(s) Energzd]
Action
NonLatch
Normal Estab. Evap. Water
Flow on going from
STOP to AUTO or Evap
Pump Override.
NonLatch
Immediate [All Stop modes]
NonLatch
Criteria
The respective evap sat temp fell below the water temp
cutout setting while the evap liquid level was greater
than -36 mm for 150º-sec degree F seconds while
Chiller is in the Stop mode, or in Auto mode with no
compressors running. Energize small Evap Circulating
Pump (RTUD A/C) and Evap Water pump Relay (but only
if "Evap Water Pump Diagnostic Override" setting is
enabled) until diagnostic auto resets, then de-energize
the circ pump and return to normal evap pump control.
Automatic reset occurs when the derived evap sat temp
rises 2°F (1.1°C) above the cutout setting for 1 minute or
the liquid level is below -36.0 mm for 20 minutes, or any
compressor restarts. OA temp is substituted for evap
sat temp in case of invalidity. This diagnostic even while
active, does not prevent operation of either circuit.
The respective evap sat temp fell below the water temp
cutout setting while the evap liquid level was greater
than -36 mm for 150º-sec degree F seconds while
Chiller is in the Stop mode, or in Auto mode with no
compressors running. Energize small Evap Circulating
Pump (RTUD A/C) and Evap Water pump Relay (but only
if "Evap Water Pump Diagnostic Override" setting is
enabled) until diagnostic auto resets, then de-energize
the circ pump and return to normal evap pump control.
Automatic reset occurs when the derived evap sat temp
rises 2°F (1.1°C) above the cutout setting for 1 minute or
the liquid level is below -36.0 mm for 20 minutes, or any
compressor restarts. OA temp is substituted for evap
sat temp in case of invalidity. This diagnostic even while
active, does not prevent operation of either circuit.
The evaporator 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 (1.1°C) above the cutout setting
for 2 minutes. This diagnostic shall not de-energize the
Evaporator Water Pump Output.
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.
a. The Evaporator water flow switch input was open
for more than 6 contiguous seconds (or 15 seconds
for thermal dispersion type flow switch). b. This
diagnostic does not de-energize the evap pump output
c. 6 seconds of contiguous flow shall clear this
diagnostic.
Reset Level
Remote
Remote
Remote
Remote
Remote
CG-SVU02C-E4