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www.DaikinApplied.com 73
IOM 1242-2 • PATHFINDER
®
MODEL AWV CHILLERS
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 Difference
Alarm:
High Oil Pressure Difference
Displayed Text:
Cn Oil PD High
Trigger:
Circuit is in the Start or Run state
and Oil Pressure Difference > High
Oil Pressure Difference value for a
time longer than High Oil Pressure
Difference Delay set point.
High Oil Pressure Difference 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
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 69: High Oil Pressure Difference Values
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.
No Pressure At Start
Alarm:
No Pressure At Start
Displayed Text:
Cn No Press At Start
Trigger:
All of the following must be true to
trigger:
• Circuit start requested
• Condenser Fan VFD
Configuration set point = None
• Either Evaporator Pressure or
Condenser Pressure are less
than 35 kPa (5.1 psi)
Action Taken:
Abort start of circuit and lock out from
running
Reset:
This alarm can be cleared manually
via the Unit Controller keypad or BAS
command if Evap Pressure and Cond
Pressure are at least 35 kPa (5.1 psi).
High Oil Pressure
Di
ff
erence Value
Opera
ti
ng PD
200kPa
1500kPa
Min value
Max value
Summary of Contents for AWV008
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