Trane SCWM Series Installation, Operation And Maintenance Manual page 82

Diagnostics
Table 23. Compressor warning
Warning: Compressor 1 Cond Limit Status (In Alarm)
Notification Class
HVAC Warning.
Warning: Compressor 1 Frostat Limit Status (In Alarm)
Notification Class
HVAC Warning.
Warning: Compressor (2-4) High Discharge Press Warning (In Alarm)
Notification Class
HVAC Warning.
Warning: Compressor (2-4) Frostat Warning (In Alarm)
Notification Class
82
Action
Compressor speed will be Head Pressure has
limited to keep the exceeded the condenser
compressor from exceeding Control Pressure Setpoint.
the Condenser Control
Pressure Setpoint.
Action
Compressor speed will be The Saturated suction
limited to keep the refrigerant temperature is
compressor from causing calculated to be below 36
frost buildup on the degrees.
evaporator coil.
Action
No action is taken on the Head Pressure has
fixed speed compressor, this exceeded the condenser
is an informational warning Control Pressure Setpoint.
only.
Action
Typical Causes
Reason
• High Condenser Water
Temperature.
• Malfunctioning TXV.
• Non Condensable in the
refrigerant.
• Low water flow in the
condenser, or no water
flow.
• Condenser Valve
malfunctioning.
Typical Causes
Reason
• Low Airflow across the
coil.
• Malfunctioning TXV.
• Dirty Air Filters.
• Dirty Evaporator Coil.
Typical Causes
Reason
• High Condenser Water
Temperature.
• Malfunctioning TXV.
• Non Condensable in the
refrigerant.
• Low water flow in the
condenser, or no water
flow.
• Condenser Valve
malfunctioning.
Typical Causes
Reason
Reset Required
No Reset required, Warning
clears when conditions no
longer exists.
Reset Required
No Reset required, Warning
clears when conditions no
longer exists.
Reset Required
No Reset required, Warning
clears when conditions no
longer exists.
Reset Required
PKG-SVX027D-EN