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