Trane SCWM Series Installation, Operation And Maintenance Manual page 74

Diagnostics
Table 28. Compressor alarming (continued)
Diagnostic: Compressor (1-4) High Pressure Shutdown (In Alarm)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this diagnostic
is cleared.
Compressor (1-4) High Pressure Cutout (In Alarm)
Notification Class
The High Pressure cutout
HVAC Critical Alarm. switch is reading a ciosed
condition which indicates
Diagnostic: Compressor (1-4) Frostat (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) High Superheat (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 temperature sensor is
reading either above is
maximum value or below is
minimum value, resulting in
an Alarm Condition after 3
point updates.
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.
Action Reason
The Calculated Saturated
Suction Refrigerant
Temperature is below 32
degrees for 5 minutes.
Action Reason
The Calculated superheat is
above 25 degrees for 10
minutes.
Typical Causes
• Sensor is not wired
properly: Verify sensor
wiring to the XM Module.
• XM Module is not
Manual Reset Required once
communicating. Ensure that
the sensor is in a Normal
the XM Module is up and
State. User must toggle the
talking to the UC600.
• Discharge Pressure is too
Compressor (1-4) Failure
high and over the cutout
Reset
threshold of the High
Pressure Switch. Verify
Condenser Pressure.
• Cutout Switch has failed.
Typical Causes
• Sensor is not wired
properly: Verify sensor
wiring to the XM Module.
• XM Module is not
communicating. Ensure that
the XM Module is up and
None, alarm clears once
talking to the UC600.
sensor is in a normal state.
• Discharge Pressure is too
high and over the cutout
threshold of the High
Pressure Switch. Verify
Condenser Pressure.
• Cutout Switch has failed.
Typical Causes
• Low Airflow across the
Manual Reset Required once
Evaptorator.
the issue is resolved. User
• Partially blocked Evaporator.
must toggle the Compressor
• Dirty Air Filter
(1-4) Failure Reset.
• Dirty Evaporator Coil
Typical Causes
• Low Charge on unit.
Manual Reset Required once
• Malfunctioning TXV.
the issue is resolved. User
• Too High of a heat load
must toggle the Compressor
• Too much air across the
(1-4) Failure Reset
evaporator
Reset Required
Reset Required
Reset Required
Reset Required
PKG-SVX027A-EN