Trane UCM-CLD - Free Cooling Alarm Messages

Free Cooling Application
RLC-SVU02F-E434
Alarm Messages - Free Cooling Application
Alarm Screen
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Unit status Description
No Alarm No Alarm -
Free Cooling ON
Chiller ON
See unit status on
Main display
Alarm LWT Sensor
Faulty LWT
Sensor
Auto
Free Cooling OFF
Chiller ON
Faulty sensor,
out of range
-38..+ 60°C during + 30s
Alarm EWT Sensor
Faulty EWT
Sensor
Auto
Free Cooling OFF
Chiller ON
Faulty sensor,
out of range
-38..+ 60°C during + 30s
Alarm OAT Sensor
Faulty OAT
Sensor
Auto
Free Cooling OFF
Chiller ON
Faulty sensor,
out of range
-38..+ 60°C during + 30s
Alarm Flow Switch Flow Switch Auto
Free Cooling OFF
Chiller OFF
No water flow during 6s
Alarm
Low LWT or EWT
Low LWT or EWT Auto
Free Cooling OFF
Chiller OFF
LWT or EWT
below LAW for
more than 16.6°C*s
Alarm
Int (LWT-EWT)
>120°C*s
LWT > EWT
during +120s
Manual
Free Cooling OFF
Chiller OFF
LWT-EWT
above 120°C*s
Alarm
3WV Position
Diff In vs Out > 10%
3WV Delta
In vs Out
Manual
Free Cooling OFF
Chiller OFF
Diff between 3WV
In and Out > 10% for
more than 2*Valve
Stroke Time