PKG-SVX027C-EN
83
Table 30.
Compressor warning (continued)
HVAC Warning.
No action is taken on the
fixed speed compressor,
this is an informational
warning only.
Head Pressure has
exceeded the condenser
Control Pressure
Setpoint.
•
High Condenser
Water Temperature.
•
Malfunctioning TXV.
•
Non Condensable in
the refrigerant.
•
Low water flow in the
condenser, or no
water flow.
•
Condenser Valve
malfunctioning.
No Reset required,
Warning clears when
conditions no longer
exists.
Warning: Compressor (2-4) Frostat Warning (In Alarm)
Notification Class
Action
Reason
Typical Causes
Reset Required
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 31.
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.
