Trane SCWM Series Installation, Operation And Maintenance Manual page 75

Table 28. Compressor alarming (continued)
Diagnostic: Compressor (1-4) Low Superheat (In Alarm)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this diagnostic
is cleared.
Diagnostic: Compressor 1 Safety Circuit Alarm (In Alarm)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this diagnostic
is cleared.
Diagnostic: Compressor (2-4) Safety Circuit Alarm (In Alarm)
Notification Class
Compressor will be locked
out and prevented from
HVAC Critical Alarm.
running until this diagnostic
is cleared.
Note: These Alarms will effect the operation of the compressor.
Table 29. Compressor warning
Warning: Compressor 1 Cond Limit Status (In Alarm)
Notification Class
Compressor speed will be
limited to keep the
HVAC Warning. compressor from exceeding
the Condenser Control
Pressure Setpoint.
PKG-SVX027A-EN
Action Reason
The Calculated superheat is
below 4 degrees for 5
minutes.
Action Reason
The Compressor VFD has
indicated that it's in fault or
the Compressor is
commanded on but does not
indicate status.
Action Reason
The Compressor Protection
module has indicated an
alarm or the Compressor is
commanded on but does not
indicate status.
Action Reason
Head Pressure has exceeded
the condenser Control
Pressure Setpoint.
Typical Causes
• Over Charge on unit.
Manual Reset Required once
• Malfunctioning TXV.
the issue is resolved. User
• Dirty Condenser tubes.
must toggle the Compressor
• Too little across the
(1-4) Failure Reset
evaporator
Typical Causes
• VFD has an issue
Manual Reset Required once
• Relay starting compressor is
the issue is resolved. User
malfunctioning.
• XM Module commanding
must toggle the Compressor
compressor relay is failed or
1 Failure Reset
not communicating.
Typical Causes
• VFD has an issue
Manual Reset Required once
• Relay starting compressor is
the issue is resolved. User
malfunctioning.
• XM Module commanding must toggle the Compressor
compressor relay is failed or
1 Failure Reset
not communicating.
Typical Causes
• High Condenser Water
Temperature
• Malfunctioning TXV.
No Reset required, Warning
• Non Condensable in the
clears when conditions no
refrigerant.
• Low water flow in the
longer exists.
condenser, or no water flow.
• Condenser Valve
malfunctioning.
Diagnostics
Reset Required
Reset Required
Reset Required
Reset Required
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