Daikin Pathfinder AWV Installation, Operation And Maintenance Manual page 78

High Discharge Temperature
Alarm: High Discharge Temperature
Displayed Text: Cn DiscTempHigh
Trigger: The following are true for 5 seconds:
• Discharge Temp > High Discharge
Temp set point
• Discharge temp sensor fault is not
active
Action Taken: Rapid shutdown of circuit and lock out from
running
Reset: This alarm can be cleared manually via the
Unit Controller keypad or via BAS command
when Discharge Temp is below the High
Discharge Temp set point.
High Oil Pressure Drop
Alarm: High Oil Pressure Drop
Displayed Text: Cn Oil PD High
Trigger: Circuit is in the Start or Run state and
Oil Pressure Drop > High Oil Pressure
Drop value for a time longer than High Oil
Pressure Drop Delay set point.
High Oil Pressure Drop value is calculated
as shown below.
Operating PD = Condenser Pressure –
Evaporator Pressure
Minimum for High Oil Pressure Difference =
High Oil Pressure Difference Minimum set
point
Maximum for High Oil Pressure Difference
= High Oil Pressure Difference Minimum set
point + 500 kPa
Note that the set point exists individually for
each circuit.
Action Taken: Rapid shutdown of circuit and lock out from
running
Reset: This alarm can be cleared manually via
the Unit Controller keypad or via BAS
command.
Figure 77: High Oil Pressure Difference Values
High Oil Pressure
Difference Value
Max value
Min value
200kPa
IOM 1242-8 • PATHFINDER
1500kPa
Operating PD
MODEL AWV CHILLERS
®
Oil Feed Loss
Alarm: Oil Feed Loss
Displayed Text: Cn Oil Feed Loss
Trigger: The following are true for 20 second:
• Oil Presence Sensor setting is 'Yes'
• Compressor is running
• Oil Presence Sensor input is off.
Action Taken: Rapid shutdown of circuit and lock out from
running
Reset: This alarm can be cleared manually via the
Unit Controller HMI.
High Motor Temperature
Alarm: High Motor Temperature
Displayed Text: Cn Motor Temp High
Trigger: Compressor VFD reports motor overheat
fault. The fault code for this is 0020H.
Action Taken: Rapid shutdown of circuit and lock out from
running
Reset: This alarm can be cleared manually via the
Unit Controller keypad when compressor
has been off for at least 5 minutes. When
the alarm is cleared in the unit controller,
the command to clear the fault in the VFD
will be sent.
Compressor Multiple Start Failure
Alarm: Compressor Multiple Start Failure
Displayed Text: Cn CompMultiStartFail
Trigger: This alarm is triggered on the third
occurrence of the below conditions within 2
hours. Prior occurrences are events.
All of the following must be true to trigger:
• Compressor Run command is on
• Compressor VFD Communication
Failure is not active
• Either VFD Actual Speed = 0 for
more than 15 seconds or VFD Actual
Speed < 13 Hz for more than 30
seconds
Action Taken: Rapid shutdown of circuit and lock out from
running
Reset: This alarm can be cleared manually via
the Unit Controller keypad or via BAS
command.
78
Alarms and Events
www.DaikinApplied.com