Daikin Navigator WWV - Unit Status Indicators; Evaporator Pump Control States; Unit State Transition Logic

OPERATION
NAVIGATOR WWV/TWVDAIKIN APPLIED
32
T2 - Auto to Shutdown. Any of the following are required:
• Unit is disabled per the Unit Enable section
• Unit alram requiring normal shutdown is active
• Circuit is running in Ice mode and Stage Down command
received
T3 - Shutdown to O󰀨. Any of the following are required:
• Unit alarm requiring rapid shutdown is active
• Circuit is in the O󰀨 state
T4 - Auto to O󰀨. Any of the following are required:
• Unit alarm requiring rapid shutdown is active
• Circuit disabled and unit in O󰀨 state
Unit Status
Unit Status is displayed to indicate the general condition of the
unit. The following table lists the text displayed for each unit
status and the conditions that enable each status. If more than
one status is enabled at the same time, the highest numbered
status overrides the others and is displayed.
Table 28: Unit Status Conditions
# Status Conditions
0 AUTO Unit State = Auto
1
OFF: Ice Mode
Timer
Unit State = O󰀨, Unit Mode = Ice, and Ice
Deay = Active
2
OFF:All Cir
Disabled
Unit State = O󰀨 and all circuits unavail-
able to start (temporary conditions are
not considered to be a cause of a circuit
being unavailable)
3
OFF: Unit
Alarm
Unit State = O󰀨 and manual reset Unit
Alarm active
4
OFF: Keypad
Disable
Unit State = O󰀨 and Unit Enable Set Point
= Disable
5
OFF: Remote
Switch
Unit State = O󰀨 and Remote Switch input
is O󰀨
6
OFF: BAS
Disable
Unit State = O󰀨, Control Source = Net-
work, and BAS Enable = false
7
OFF: Unit
Switch
Unit State = O󰀨 and Unit Switch input is
O󰀨
8
OFF: Test
Mode
Unit State = O󰀨 and Unit Mode = Test
9
AUTO: Wait
For Load
Unit State = Auto, no circuits running, and
LWT is less than the active set point +
startup delta
10/11
AUTO: Evap
Recirc or Cond
Recirc
Unit State = Auto and Evaporator State =
Start or Condenser State = Start
12/13
AUTO: Wait
Cond Flow
or Wait Evap
Flow
Unit State = Auto, Evaporator State =
Start and Flow Switch input is o󰀨, or
Condenser State = Start and Flow Switch
input is o󰀨
14 Shutting Down Unit State = Shutdown
15
AUTO: Max
Pulldn Rate
Unit State = Auto, unit capacity limited by
the evap EWT pulldown rate
16
AUTO: Unit
Cap Limit
Unit State = Auto, unit capacity limit has
been met or exceeded
17
AUTO:
RapidRestore
Unit State = Auto, unit is performing
RapidRestore operation
18
OFF: Cfg Chg
Rst Ctrl
A conguration change requiring a reboot
has occurred but controller has not been
rebooted yet.
19
OFF: Invalid
Cong
The unit conguration is not complete.
20
OFF: Sending
VFD Cong
Controller is conguring the compressor
VFD via Modbus communication
Evaporator Pump Control
Three evaporator pump control states for control of the
evaporator pumps.
1. O󰀨 - No pump on.
2. Start – Pump is on, water loop is being recirculated.
3. Run – Pump is on, water loop has been recirculated, and
circuits can start if needed.
T1 - O󰀨 to Start - Requires either of the following to be true:
• Unit state = Auto
• Freeze protection started
T2 - Start to Run - Requires the following to be true for time
longer than evaporator recurculate time set point:
• Evap state = Start
• Evaporator ow switch input is on
T3 - Run to O󰀨 - Requires all of the following to be true:
• Unit state = O󰀨
• Freeze protection is not active
T4 - Start to O󰀨. - Requires all of the following to be true:
• Unit state = O󰀨
• Freeze protection is not active
T5 - Run to Start. - Requires the following to be true for longer
than the Evaporator Flow Loss Delay set point:
• Evap State = Run
• Evaporator ow switch input is o󰀨
START
RUN
3
5