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OPERATION
Liquid Line Temperature Sensor Fault
Displayed Text:
C1 LiqTempSenFault
Trigger:
Trigger if UC communication with EEXV1 module
is OK and any of the following are true for at least
1 second:
Sensor input value < 340 Ω
Sensor input value > 300 kΩ
Sensor reliability reported by control system ≠
'No Fault'
Action Taken:
Normal shutdown of unit and lock out from
running
Reset:
This alarm can be cleared manually via the Unit
Controller HMI or BAS command if sensor input
value is 340 Ω to 300 kΩ and sensor reliability =
'No Fault' for at least 5 seconds.
Power Loss While Running
Displayed Text:
C1 PwrLossWhileRun
Trigger:
Circuit is running when controller loses power
Action Taken:
None
Reset:
N/A
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 register as alarms. These events are stored in a
separate log from alarms. 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 7 days.
Unit Power Restore
This event will trigger when the controller restarts and
the last reset cause was 'power'. The reset cause
Trigger:
is a system parameter available to be read in the
controller.
Action Taken:
None
Reset:
N/A
Low Evaporator Pressure - Hold
Trigger:
This event will trigger when the unit mode is Cool,
circuit state is Run, and evaporator pressure drops
below the low evaporator pressure hold value.
Low evaporator pressure hold value = Low Evapo-
rator Pressure Unload set point + Low Evaporator
Pressure Hold Offset set point
Action Taken:
Circuit will not be able to increase in capacity.
Reset:
This event is reset when the evaporator pressure
rises at least 14 kPa (2.03 psi) above the Low
Evaporator Pressure Hold set point. It is also reset
if the circuit is no longer in the run state or the unit
operating mode is changed to Ice.
DAIKIN APPLIED
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.
Action Taken: Compressor speed will decrease 1Hz every
second until evaporator pressure rises up to at
least the Low Evaporator Pressure Unload set
point.
Reset:
This event is reset when the evaporator
pressure rises at least 14 kPa (2.03 psi) above
the Low Evaporator Pressure Hold set point. 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 is Cool,
the circuit state is Run, and saturated condenser
temperature rises above the high saturated condens-
er hold value.
Action Taken:
Circuit will not be able to increase in capacity.
Reset:
This event is reset when the saturated condenser
temperature drops at least 0.5°C below the high
saturated condenser hold value. It is also reset if the
circuit is no longer in the run state or the unit operat-
ing mode is changed to Ice.
High Condenser Pressure - Unload
Trigger:
This event will trigger when the unit mode is Cool, the
circuit state is Run, and saturated condenser tempera-
ture rises above the high saturated condenser unload
Action Taken:
Compressor speed will decrease 1Hz every second
until saturated condenser temperature drops below the
high saturated condenser unload value.
Reset:
This event is reset when saturated condenser tem-
perature drops at least 0.2°C below the high saturated
condenser unload value. It is also reset if the circuit is
no longer in the run state or the unit operating mode is
High VFD Output Current Hold
Trigger:
This event will trigger when all of the following are
true:
Unit mode = Cool
compressor is running
Motor Current > Max Motor Current x 0.95
Action Taken:
Circuit will not be able to increase in capacity.
Reset:
This event is reset when Motor Current < Max Motor
Current x 0.95 for at least 60 seconds. It is also reset
when the compressor is no longer running or the unit
operating mode is changed to Ice.
48
value .
changed to Ice.
NAVIGATOR WWV/TWV
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