Trane SCWM Series User Manual

80
PKG-SVX027D-EN
Table 22. Compressor alarming (continued)
HVAC Critical Alarm. The High Pressure cutout
switch is reading a closed
condition which indicates.
The temperature sensor is
reading either above is
maximum value or below is
minimum value, resulting in
an Alarm Condition after 3
point updates.
• 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.
• Discharge Pressure is
too high and over the
cutout threshold of the
High Pressure Switch.
Verify Condenser
Pressure.
• Cutout Switch has
failed.
None, alarm clears once
sensor is in a normal state.
Diagnostic: Compressor (1-4) Frostat (In Alarm)
Notification Class Action Reason
Typical Causes Reset Required
HVAC Critical Alarm. Compressor will be locked
out and prevented from
running until this diagnostic is
cleared.
The Calculated Saturated
Suction Refrigerant
Temperature is below 32
degrees for 5 minutes.
• Low Airflow across the
Evaporator.
• Partially blocked
Evaporator.
• Dirty Air Filter.
• Dirty Evaporator Coil.
Manual Reset required once
the issue is resolved. User
must toggle the Compressor
(1-4) Failure Reset.
Diagnostic: Compressor (1-4) High Superheat (In Alarm)
Notification Class Action Reason
Typical Causes Reset Required
HVAC Critical Alarm. Compressor will be locked
out and prevented from
running until this diagnostic is
cleared.
The Calculated superheat is
above 25 degrees for 10
minutes.
• Low Charge on unit.
• Malfunctioning TXV.
• Too high of a heat load.
• Too much air across the
evaporator.
Manual Reset required once
the issue is resolved. User
must toggle the Compressor
(1-4) Failure Reset.
Diagnostic: Compressor (1-4) Low Superheat (In Alarm)
Notification Class Action Reason
Typical Causes Reset Required
Diagnostics

Trane SCWM Series Specifications

General

Brand	Trane
Model	SCWM Series
Category	Industrial Equipment
Language	English