Evaporator Pump Control - Daikin AGZ030E Installation, Operation And Maintenance Manual

Unit Status
The displayed unit status should be determined by the
conditions in the following table:
# Status
1 Auto
2 Auto: Sound Reduction
3 Off: Motor Prot Delay
4 Off: Ice Mode Timer
5 Off: Low OAT Lockout
6 Off: All Cir Disabled
7 Off: Unit Alarm
8 Off: Keypad Disable
9 Off: Remote Switch
10 Off: BAS Disable
11 Off: Unit Switch
12 Off: Test Mode
13 Auto: Wait for load
14 Auto: Evap Recirculate
15 Auto: Wait for flow
16 Auto: Pumpdown
17 Auto: Max Pulldown Rate
18 Auto: Unit Cap Limit
19 Auto: High Amb Limit
20 Auto:Rapid Restore
21 Off:Cond Type Not Set
22 Off:ExVlv Type Not Set
23 Off:Invalid Config
24 Cfg Chg, Rst Ctlr
IOM 1206-7 • TRAILBLAZER
Conditions
Unit State = Auto
Unit State = Auto and Sound
Reduction is active
Unit State = Auto and MP start
up delay is active
Unit State = Off,
Unit Mode = Ice, and
Ice Delay = Active
Unit State = Off and Low OAT
Lockout is active
Unit State = Off and both circuits
unavailable
Unit State = Off and Unit Alarm
active
Unit State = Off and Unit Enable
Set Point = Disable
Unit State = Off and Remote
Switch is open
Unit State = Off, Control Source
= Network, and BAS Enable =
false
Unit State = Off and Unit Switch
= Disable
Unit State = Off and Unit Mode
= Test
Unit State = Auto, no circuits
running, and LWT is less than
the active set point + startup
delta
Unit State = Auto and
Evaporator State = Start
Unit State = Auto, Evaporator
State = Start, and Flow Switch
is open
Unit State = Pumpdown
Unit State = Auto, max pulldown
rate has been met or exceeded
Unit State = Auto, unit capacity
limit has been met or exceeded
Unit State = Auto and high
ambient capacity limit is active
Unit State = Auto and unit is
performing Rapid Restore
operation
Condenser type setting is set to
'Not Set'
Expansion valve type setting is
set to 'Not Set'
Unit model selected not valid
A configuration change requiring
a reboot occurred but controller
has not been rebooted yet.
MODEL AGZ CHILLERS
™

Evaporator Pump Control

For control of the evaporator pumps, three evaporator pump
control states should be used:
Off - No pump on.
Start – Pump is on, water loop is being recirculated.
Run – Pump is on, water loop has been recirculated and
circuits can start if needed.
Transitions between these states are shown in the following
diagram.
RUN
T1 – Off to Start
Requires any of the following
• Unit state = Auto
• Freeze protection started
T2 – Start to Run
Requires the following
• Flow ok for time longer than evaporator recirculate time
set point
T3 – Run to Off
Requires all of the following
• Unit state is Off
• Freeze protection not active
T4 – Start to Off
Requires all of the following
• Unit state is Off
• Freeze protection not active
T5 – Run to Start
Flow switch input is low for longer than the flow proof set
point.
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U f
nIT UnCTIons
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