Trane SCWM Series Installation, Operation And Maintenance Manual page 83

Table 23. Compressor warning (continued)
HVAC Warning.
Note: These warnings are generated to alert the end user to a potential condition.
Table 24. Supply fan alarms
Supply Fan (1-6) Failure (In Fault)
Notification Class
HVAC Critical Alarm.
Note: These failures are generated by each fan and will lock out that fan when active.
Emergency Stop (In Alarm)
Notification Class
HVAC Critical Alarm.
Table 25. General unit alarming
External Auto/Stop (In Alarm)
Notification Class
HVAC Critical Alarm.
Local Auto/Stop (In Alarm)
PKG-SVX027D-EN
No action is taken on the The Saturated suction
fixed speed compressor, this refrigerant temperature is
is an informational warning calculated to be below 36
only. degrees.
Action
Fan will be locked out and The supply fan was
prevented from running until commanded on and a VFD
this diagnostic is cleared. Fault was detected.
Action
Unit will shut down and be The emergency stop input
prevented from operating has an open condition which
until the sensor is in a normal indicates an emergency stop
state. command.
Action
Unit will shut down and be The external auto/stop input
prevented from operating has an open condition which
until the sensor is in a normal indicates an emergency stop
state. command.
• Low Airflow across the
coil.
• Malfunctioning TXV.
• Dirty Air Filters.
• Dirty Evaporator Coil.
Typical Causes
Reason
• VFD Fan circuit Breaker
is open.
• VFD Fan has over
amped.
• VFD Fan has lost a
phase.
Typical Causes
Reason
Emergency Stop Binary Input
is open.
Typical Causes
Reason
Emergency stop binary input
is open.
Diagnostics
No Reset required, Warning
clears when conditions no
longer exists.
Reset Required
Manual Reset required once
the issue is resolved. User
must toggle the Supply
Failure Reset.
Reset Required
Manual reset required once
the issue is resolved. User
must toggle the alarm reset
value.
Reset Required
None, alarm clears once
sensor is in a normal state.
83