Daikin WGZ030DW Operating And Maintenance Manual page 37

Power Up Start Delay
After powering up the unit, the motor protector modules may not reset for up to 150 seconds. After the
control is powered up, no compressor can start for 150 seconds. Motor protect inputs are ignored during
this time so as to avoid tripping a false alarm.
Ice Mode Start Delay
An adjustable start to start ice delay timer will limit the frequency with which the chiller may start in Ice
mode. The timer starts when the first compressor starts while the unit is in ice mode. While this timer is
active, the chiller cannot restart in Ice mode. The time delay is user adjustable.
The ice delay timer may be manually cleared to force a restart in ice mode. A set point specifically for
clearing the ice mode delay is available. In addition, cycling the power to the controller will clear the ice
delay timer.
Low Ambient Lockout
This feature is only available on air cooled units (WaterCooled=Off).
If the OAT drops below the low ambient lockout set point, then all running circuits will do a normal stop.
Once the lockout has been triggered, no compressors will start until the OAT rises to the lockout set point
plus 5°F.
Unit State
The Unit will always be in one of three states. These states are Off, Auto, and Pumpdown. Transitions
between these states are shown in the diagram on the following page.
T1: Off to Auto
Unit Enable = True AND
No Unit Alarm AND
IF Unit Mode = Cir 1 Available OR Cir 2 Available
T2: Auto to Pumpdown
Keypad Enable = Off OR
BAS Enable = Off OR
Remote Switch = Off OR
T3: Pumpdown to Off
Unit Alarm OR
Unit Switch Off OR
No Compressors Running
T4: Auto to Off
Unit Alarm OR
Unit Switch Off OR
No Compressors Running AND [Unit Mode = Ice AND Ice Delay Active] OR
No Compressors Running AND [No Circuit Available]
OMM 1130-2 37