Trane SCWM Series Installation, Operation And Maintenance Manual page 72

Diagnostics
Table 28. Compressor alarming
Diagnostic: Compressor (1-4) Discharge Pressure Sensor Failure (In Alarm)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this diagnostic
is cleared.
Compressor (1-4) Discharge Pressure Sensor Failure (In Fault)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this sensor is in
a normal state.
Diagnostic: Compressor (1-4) Suction Pressure Sensor Failure (In Alarm)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this diagnostic
is cleared.
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Action Reason
The Pressure sensor is
calculated to be in fault and
the unit has locked out the
compressor from operation.
Action Reason
The Pressure sensor is
reading either Above or
Below its minimum value,
resulting in a Fault Condition
after 3 point updates.
Action Reason
The Pressure sensor is
calculated to be in fault and
the unit has locked out the
compressor from operation.
Typical Causes
• Sensor has lost its 5VDC
Source Signal. Verify that
the sensor has 5 VDC.
• Sensor is not wired
properly: Verify wiring to the
Manual Reset Required once
XM Module.
the sensor is in a Normal
• XM Module is not
State. User must toggle the
communicating. Ensure that
Compressor (1-4) Failure
the XM Module is up and
Reset
talking to the UC600.
• System has no charge:
Verify that the system has a
refrigerant charge.
• Sensor has Failed.
Typical Causes
• Sensor has lost its 5VDC
Source Signal. Verify that
the sensor has 5 VDC.
• Sensor is not wired
properly: Verify wiring to the
XM Module.
None, fault clears once
• XM Module is not
communicating. Ensure that sensor is in a normal state.
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
• Sensor has lost its 5VDC
Source Signal. Verify that
the sensor has 5 VDC.
• Sensor is not wired
properly: Verify wiring to the
Manual Reset Required once
XM Module.
the sensor is in a Normal
• XM Module is not
State. User must toggle the
communicating. Ensure that
Compressor (1-4) Failure
the XM Module is up and
Reset.
talking to the UC600.
• System has no charge:
Verify that the system has a
refrigerant charge.
• Sensor has Failed.
Reset Required
Reset Required
Reset Required
PKG-SVX027A-EN