Trane SCWM Series Installation, Operation And Maintenance Manual page 77

Table 22. Compressor alarming
Diagnostic: Compressor (1-4) Discharge Pressure Sensor Failure (In Alarm)
Notification Class
HVAC Critical Alarm.
Diagnostic: Compressor (1-4) Discharge Pressure Sensor Failure (In Fault)
Notification Class
HVAC Critical Alarm.
Diagnostic: Compressor (1-4) Suction Pressure Sensor Failure (In Alarm)
Notification Class
PKG-SVX027D-EN
Action
Compressor will be locked The Pressure sensor is
out and prevented from calculated to be in fault and
running until this diagnostic is the unit has locked out the
cleared. compressor from operation.
Action
Compressor will be locked The Pressure sensor is
out and prevented from reading either Above or
running until this sensor is in Below its minimum value,
a normal state. resulting in a Fault Condition
after 3 point updates.
Action
Typical Causes
Reason
• Sensor has lost its 5 Vdc
Source Signal. Verify
that the sensor has 5
Vdc.
• Sensor is not wired
properly: Verify wiring to
the XM Module.
• XM Module is not
communicating. Ensure
that the XM Module is
up and talking to the
UC600.
• System has no charge:
Verify that the system
has a refrigerant charge.
• Sensor has failed.
Typical Causes
Reason
• Sensor has lost its 5 Vdc
Source Signal. Verify
that the sensor has 5
Vdc.
• Sensor is not wired
properly: Verify wiring to
the XM Module.
• XM Module is not
communicating. Ensure
that the XM Module is
up and talking to the
UC600. System has no
charge: Verify that the
system has a refrigerant
charge.
• Sensor has failed.
Typical Causes
Reason
Diagnostics
Reset Required
Manual Reset required once
the sensor is in a Normal
State. User must toggle the
Compressor (1-4) Failure
Reset.
Reset Required
None, fault clears once
sensor is in a normal state.
Reset Required
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