Daikin Navigator WWV - High VFD Output Current Unload Event; High VFD Temperature Unload Event; Low Pressure Ratio Shutdown Event

49
IOM 1264-4
WWW.DAIKINAPPLIED.COM
OPERATION
High VFD Output Current Unload
Trigger: This event will trigger when compressor is running,
Unit mode = Cool, and either of the following occur:
Motor Current > Max Motor Current
Motor Current > Max Motor Current x 0.97 for 5
seconds
Action Taken: Compressor speed will decrease 1Hz every two
seconds until the event reset condition is met.
Reset: This event is reset when Motor Current < Max Motor
Current x 0.97 for at least 3 seconds. It is also reset
when the compressor is no longer running or the unit
operating mode is changed to Ice.
High VFD Input Current Hold
Trigger: This event will trigger when all of the following are
true for at least 5 seconds:
Unit mode = Cool
compressor is running
VFD Line Current > VFD Primary RLA set point
VFD Primary RLA set point is part of the unit cong-
uration.
Action Taken: Circuit will not be able to increase in capacity.
Reset: This event is reset when VFD Line Current < VFD
Primary RLA set point x 0.99 for at least 3 minutes.
It is also reset when the compressor is no longer
running or the unit operating mode is changed to Ice.
High VFD Input Current Unload
Trigger: This event will trigger when all of the following are
true for at least 5 seconds:
Unit mode = Cool
compressor is running
VFD Line Current > VFD Primary RLA set point x
1.05
VFD Primary RLA set point is part of the unit cong-
uration.
Action Taken: Compressor speed will decrease 1Hz every 2 sec-
onds until the event reset condition is met.
Reset: This event is reset when VFD Line Current ≤ VFD
Primary RLA set point x 1.05. It is also reset when
the compressor is no longer running or the unit oper-
ating mode is changed to Ice.
High VFD Temperature Hold
Trigger: This event will trigger when all of the following are
true for at least 5 seconds:
Unit mode = Cool
compressor is running
VFD Heat Sink > 84°C
Action Taken: Compressor will not be able to increase in speed or
capacity.
Reset: This event is reset when VFD Heatsink Temp < 84°C
for at least 60 seconds. It is alsow reset when the
compressor is not running or the unit operating mode
is changed to Ice.
High VFD Temperature Unload
Trigger: This event will trigger when all of the following are true
for at least 5 seconds:
Unit mode = Cool
compressor is running
VFD Heat Sink > 87°C
Action Taken: Compressor speed will decrease at a rate equivalent
to 1Hz every 10 seconds.
Reset: This event is reset when VFD Heatsink Temp ≤ 87°C.
It is alsow reset when the compressor is not running
or the unit operating mode is changed to Ice.
Low Pressure Ratio Shutdown
Trigger: This event will trigger on the rst and second
occurrence of the below conditions within 2 hours. A
third occurrence within a 2 hour window triggers the
alarm.
Circuit state is Run and pressure ratio < 1.3 for a
time > Low Pressure Ratio Delay set point.
Action Taken: Rapid shutdown of unit
Reset: This event resets immediately after triggering.
Compressor Start Failure
Trigger: This event will trigger on the rst and second
occurrence of the below conditions within 2 hours.
A third occurrence within a 2 hour window triggers
the alarm.
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 < 14Hz for more
than 30 seconds
Action Taken: Rapid shutdown of unit
Reset: This event resets immediately after triggering.