Trane SCWM Installation, Operation And Maintenance Manual page 81

Table 29. Compressor alarming (continued)
Notification Class
HVAC Critical Alarm.
Diagnostic: Compressor (1-4) Low Superheat (In Alarm)
Notification Class
HVAC Critical Alarm.
Diagnostic: Compressor 1 Safety Circuit Alarm (In Alarm)
Notification Class
HVAC Critical Alarm.
Diagnostic: Compressor (2-4) Safety Circuit Alarm (In Alarm)
Notification Class
PKG-SVX027C-EN
Action
Compressor will be locked The Calculated superheat
out and prevented from is above 25 degrees for 10
running until this minutes.
diagnostic is cleared.
Action
Compressor will be locked The Calculated superheat
out and prevented from is below 4 degrees for 5
running until this minutes.
diagnostic is cleared.
Action
Compressor will be locked The Compressor VFD has
out and prevented from indicated that it's in fault
running until this or the Compressor is
diagnostic is cleared. commanded on but does
not indicate status.
Action
Typical Causes
Reason
• Low Charge on unit.
• Malfunctioning TXV.
• Too high of a heat
load.
• Too much air across
the evaporator.
Typical Causes
Reason
• Over Charge on unit.
• Malfunctioning TXV.
• Dirty Condenser
tubes.
• TXV Bulb is not
strapped tightly to
suction line.
• Too little air across
the evaporator.
Typical Causes
Reason
• VFD has an issue.
• Relay starting
compressor is
malfunctioning.
• XM Module
commanding
compressor relay is
failed or not
communicating.
Typical Causes
Reason
D D i i a a g g n n o o s s t t i i c c s s
Reset Required
Manual Reset required
once the issue is resolved.
User must toggle the
Compressor (1-4) Failure
Reset.
Reset Required
Manual Reset required
once the issue is resolved.
User must toggle the
Compressor (1-4) Failure
Reset.
Reset Required
Manual Reset required
once the issue is resolved.
User must toggle the
Compressor 1 Failure
Reset.
Reset Required
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