Trane SCWM Series User Manual

PKG-SVX027D-EN
81
Table 22. Compressor alarming (continued)
HVAC Critical Alarm. Compressor will be locked
out and prevented from
running until this diagnostic is
cleared.
The Calculated superheat is
below 4 degrees for 5
minutes.
• Over Charge on unit.
• Malfunctioning TXV.
• Dirty Condenser tubes.
• TXV Bulb is not
strapped tightly to
suction line.
• Too little air across the
evaporator.
Manual Reset required once
the issue is resolved. User
must toggle the Compressor
(1-4) Failure Reset.
Diagnostic: Compressor 1 Safety Circuit Alarm (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 Compressor VFD has
indicated that it’s in fault or
the Compressor is
commanded on but does not
indicate status.
• VFD has an issue.
• Relay starting
compressor is
malfunctioning.
• XM Module
commanding
compressor relay is
failed or not
communicating.
Manual Reset required once
the issue is resolved. User
must toggle the Compressor
1 Failure Reset.
Diagnostic: Compressor (2-4) Safety Circuit Alarm (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 Compressor Protection
module has indicated an
alarm or the Compressor is
commanded on but does not
indicate status.
• VFD has an issue.
• Relay starting
compressor is
malfunctioning.
• XM Module
commanding
compressor relay is
failed or not
communicating.
Manual Reset required once
the issue is resolved. User
must toggle the Compressor
1 Failure Reset.
Note: These Alarms will affect the operation of the compressor.
Diagnostics

Trane SCWM Series Specifications

General

Brand	Trane
Model	SCWM Series
Category	Industrial Equipment
Language	English