Daikin Pathfinder AWV Installation, Operation And Maintenance Manual page 82

Reset: This alarm will automatically clear if value
reported is from 3.85 to 3083 kPa for 5
seconds.
Economizer Temperature Sensor Fault
Alarm: Economizer Temperature Sensor Fault
Displayed Text: Cn EconTempSenFault
Trigger: The following conditions must be true to
trigger:
• Economizer Configuration set point =
Yes
• Communication with EVD module is
OK
• Value reported is more than 150°C or
less than -40°C for at least 1 second
Action Taken: Economizer forced to closed state and will
remain closed.
Reset: This alarm will automatically clear if value
reported is from -40°C to 150°C for 5
seconds.
Economizer EXV Motor Error
Alarm: Economizer EXV Motor Error
Displayed Text: Cn EconExvMotorErr
Trigger: Driver in Economizer EXV module reports
EXV motor error. Driver A is for circuit #1
and Driver B is for circuit #2.
Action Taken: Economizer forced to closed state and will
remain closed.
Reset: Automatically clear when EXV motor error is
not being reported for 5 seconds.
ECM/DC Fan Motor Fault
Alarm: DC Fan Motor Fault
Displayed Text: Cn DcFanMotorFault
Trigger: Any ECM/DC fan motor on the circuit has
a fault as indicated by a flag sent from the
DC controller.
Action Taken: None
Reset: Fault flag is not set for at least one second.
This alarm can be cleared manually via
the keypad or BAS command if trigger
condition is not true. When the alarm clear
command is set via keypad or BAS, a
request to clear alarms is sent to the DC
controller.
Events
Situations may arise that require some action from the chiller
or that should be logged for future reference, but aren't severe
enough to track as alarms. These events are stored in a log
separate from alarms but accessed through the alarm menu.
This log shows the time and date of the latest occurrence,
the count of occurrences for the current day, and the count of
occurrences for each of the previous seven days.
IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS
®
There is only one unit level event, Unit Power Restore. This is
selectable directly from the event log screen. A setting on the
Unit Power Restore screen allows selecting which day to show
the count for.
The event log screen also allows selection of either circuit 1 or
circuit 2. Each circuit will have its own event log screen. These
circuit event log screens have a setting that allows selecting
which event to view and a setting to allow selecting which day
to show the count for.
Unit Power Restore
Trigger: Unit controller is powered up.
Action Taken: None
Reset: N/A
Low Evaporator Pressure - Hold
Trigger: This event will trigger when the unit mode is Cool,
the circuit state is Run, and evaporator pressure
drops below the low evaporator pressure hold
value for 5 seconds.
Low evaporator pressure hold value = Low
Evaporator Pressure Unload set point + Low
Evaporator Pressure Hold Offset set point
Action
Circuit will not be able to increase in capacity.
Taken:
Reset: This event is reset when the evaporator pressure
rises at least 14 kPa (2.03 psi) above the low
evaporator pressure hold value for 3 seconds. It is
also reset if the circuit is no longer in the Run state
or the unit operating mode is changed to Ice.
Low Evaporator Pressure - Unload
Trigger: This event will trigger when the unit mode is Cool,
the circuit state is Run, and evaporator pressure
drops below the Low Evaporator Pressure Unload
set point for 5 seconds.
Action Compressor speed will decrease by 1 Hz every
Taken: second.
Reset: This event is reset when the evaporator pressure
rises above the Low Evap Pressure Unload set
point for 5 seconds. It is also reset if the circuit is
no longer in the Run state or the unit operating
mode is changed to Ice.
High Condenser Pressure - Hold
Trigger: This event will trigger when the unit mode = Cool,
compressor is running, and saturated condenser
temperature > high saturated condenser hold value
for at least 5 seconds.
Action
Compressor will not be able to increase
Taken:
Reset: This event is cleared when the saturated
condenser temperature drops at least 2°C below
the high saturated condenser hold value for at
least 3 minutes. It is also cleared if the circuit is no
longer in the Run state or the unit operating mode
is changed to Ice.
82
Alarms and Events
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