Daikin Navigator WWV - Compressor VFD Communication Failure Alarm; Compressor VFD Fault Alarms; Compressor VFD Over Voltage Alarm

OPERATION
NAVIGATOR WWV/TWVDAIKIN APPLIED
46
Low Pressure Ratio
Displayed Text: C1 Low Pr Ratio
Trigger: Circuit state is Run and pressure ratio < 1.3 for a
time > Low Pressure Ratio Delay set point.
This alarm is actually triggered on the third oc-
currence of the above conditions within 2 hours.
Prior occurrences are events.
Action Taken: Rapid shutdown of unit and lock out from running
on the third occurrence.
Reset: This alarm can be cleared manually via the Unit
Controller HMI or via BAS command.
High Compressor VFD Output Current
Displayed Text: C1 CmpVfd Curr OutHigh
Trigger: This alarm will trigger when all of the following are
true:
compressor is running
Motor Current > Max Motor Current x 1.1 for at
least 2 seconds
Action Taken: Rapid shutdown of unit and lock out from running
Reset: This alarm can be cleared manually via the Unit
Controller HMI or via BAS command.
High Compressor VFD Input Current
Displayed Text: C1 CmpVfd Curr In High
Trigger: This alarm will trigger when all of the following
are true for at least 5 seconds:
unit mode is Ice
compressor is running
VFD Input Current > VFD Primary RLA set point
x 1.05
VFD Primary RLA set point is part of the unit
conguration.
Action Taken: Rapid shutdown of unit and lock out from running
Reset: This alarm can be cleared manually via the Unit
Controller HMI or via BAS command.
Compressor VFD Comm Failure
Displayed Text: C1 CompVfd CommFail
Trigger: Communication with the compressor VFD has
failed. This means that either a modbus congu-
ration error has occurred, or a modbus command
has failed in 10 consecutive loops of the modbus
commands for this node address.
Action Taken: Rapid shutdown of unit and lock out from running
Reset: This alarm can be cleared manually via the Unit
Controller HMI or via BAS command if communi-
cation has been restored for 5 seconds.
Compressor VFD Fault
Displayed Text: C1 Comp Vfd Fault
Trigger: Trip ag from VFD is set and alarm ags for the
following VFD alarms are NOT set:
Earth fault
High control card temperature
Control word timeout
High Motor Temp
DC link undervoltage
DC link overvoltage
Mains Phase Loss
Motor Phase Loss
Safe Stop
The above conditions are required for one sec-
ond to trigger the alarm.
Action Taken: Rapid shutdown of unit and lock out from running
Reset: This alarm can be cleared manually via the Unit
Controller HMI or via BAS command. When
alarm is cleared, command to reset alarms
should be sent to VFD.
Compressor VFD Over Voltage
Displayed Text: C1 VfdOverVoltage
Trigger: DC link over voltage alarm ag is set in compres-
sor VFD for at least one second.
Action Taken: Rapid shutdown of unit and lock out from running
Reset: This alarm will automatically reset when ‘DC link
over voltage’ alarm ag is not set for at least 5
seconds.
Compressor VFD Under Voltage
Displayed Text: C1 VfdUnderVoltage
Trigger: DC link under voltage alarm ag is set in com-
pressor VFD.
Action Taken: Rapid shutdown of unit and lock out from running
Reset: This alarm will automatically reset when ‘DC link
under voltage’ alarm ag is not set for at least 5
seconds.
Compressor Motor Phase Loss
Displayed Text: C1 Motor Phase Loss
Trigger: Any of the following Compressor VFD alarm ags
is set:
Motor phase U is missing
Motor phase V is missing
Motor phase W is missing
Action Taken: Rapid shutdown of unit and lock out from running
Reset: This alarm will automatically reset when none of
the motor phase loss alarm ags are set for at
least 5 seconds.