Trane Exergy S 180 Installation And Operation Manual page 67

Failure
Protection device
alarm
Not starting
Not stopping
Monitoring alarms
If there are active alarms in the system, the Alarm icon will be displayed on the control
panel's screen. In the figure below, the alarm icon is displayed in the Process view.
Alarm active ver. 2
To view the alarm or fault, access the Alarms view by tapping on the Alarm icon.
Alternatively, open the Process view and tap on the Alarms button (marked in red in
the figure below).
Alarms button ver. 1
Alarms view
Both active alarms and historical alarms are displayed in the Alarms view.
EXES01 2150EN
Probable cause
If the device resets automatically within an
hour, then compressor motor overheating
protection has tripped (motor gets hotter
when warm water temperature is higher and
cold water temperature lower). If not, then oil
alarm.
The heat pump controller is giving a start
signal, but the heat pump does not start or
the motor's ON signal does not reach the
controller. Electrical problem, either contactor
or wiring.
The heat pump controller is giving a stop
signal, but the heat pump does not stop or
the motor's OFF signal does not reach the
controller. Electrical problem, either contactor
or wiring.
Before resetting any alarms that have caused the heat pump to stop,
investigate the cause of the alarm and address the root cause of the
issue.
Recommended actions
Reset by pressing the button in
the oil alarm device attached to
the compressor. Try increasing
compressor minimum power to
improve oil flow.
Check wiring, contact Customer
Service.
Check wiring, contact Customer
Service.
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