31InRow RD 10 kW Air Cooled Operation and Maintenance
Suction Pressure Sensor Failure Warning • Make sure the sensor is connected properly.
•If the problem persists, replace the sensor or contact APC at a
number on the back cover of this manual.
Dischrg Pressure Sensor Failure Warning • Make sure the sensor is connected properly.
• If the problem persists, contact APC at a number on the back cover
of this manual.
Input Contact Fault Warning • Make sure the Input Normal state is defined correctly in the
Configure Unit> Discrete I/O screen. See page17 for more
information.
•Clear the problem that caused the input contact switch to change
from the normal state.
• If the problem persists, contact APC at a number on the back cover
of this manual.
Persistent High Discharge
Pressure Fault
Critical •Indicates there were three High Discharge Pressure shutdowns in
30 minutes. Alarms must be cleared manually.
• If the problem persists, contact APC at a number on the back cover
of this manual.
Persistent Low Suction Pressure
Fault
Critical •Indicates there were 3 Low Suction Pressure shutdowns in 30
minutes. Alarms must be cleared manually.
• If the problem persists, contact APC at a number on the back cover
of this manual.
Cannot Start Due to Low
Suction Pressure
Critical • The unit cannot start because the suction (low side) refrigerant
pressure is too low.
•F or assistance, contact APC at a number on the back cover of this
manual.
Superheat too Low Warning •F or assistance, contact APC at a number on the back cover of this
manual.
Rack Inlet
(Rack Inlet Temperature High
Threshold)
Critical •M ake sure the Rack Inlet setting is correct in the Set Unit
Threshlds screen.
• If the problem persists, contact APC at a number on the back cover
of this manual.
Supply Air
(Supply Air Temperature High
Threshold)
Critical •M ake sure the Supply Air setting is correct in the Set Unit
Threshlds screen.
• If the problem persists, contact APC at a number on the back cover
of this manual.
Return Air
(Return Air Temperature
HighThreshold)
Critical •M ake sure the Return Air setting is correct in the Set Unit
Threshlds screen.
• If the problem persists, contact APC at a number on the back cover
of this manual.
Alarm Message Severity Action Required