Trane SCWM Series Installation, Operation And Maintenance Manual page 73

Table 28. Compressor alarming (continued)
Diagnostic: Compressor (1-4) Suction 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 Temperature Sensor Failure (In Alarm)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this diagnostic
is cleared.
Diagnostic: Compressor (1-4) Suction Temperature 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.
PKG-SVX027A-EN
Action Reason
The Pressure sensor is
reading either above is
maximum value or below is
minimum value, resulting in
a Fault Condition after 3
point updates.
Action Reson
The Temperature sensor is
calculated to be in fault and
the unit has locked out the
compressor from operation.
Action Reason
The temperature sensor is
reading either above is
maximum value or below is
minimum value, resulting in
an Alarm Condition after 3
point updates.
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, alarm 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 is not wired
properly: Verify sensor
wiring to the XM Module.
Manual Reset Required once
• XM Module is not
the sensor is in a Normal
communicating. Ensure that
State. User must toggle the
the XM Module is up and
talking to the UC600.
Compressor (1-4) Failure
• Sensor has Failed. Verify if
Reset.
sensor has any resistance on
it, should be 8-12k of
resistance on the thermistor.
Typical Causes
• Sensor has lost its 5VDC
Source Signal. Verify that
the sensor has 5 VDC.
• Sensor is not wired
properly: Verifying Wiring to
the XM Module.
None, alarm 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.
Diagnostics
Reset Required
Reset Required
Reset Required
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