Daikin MICROTECH 4 Operation Manual page 120

UNIT MAINTENANCE AND SERvICE
Timer Settings
The Timer Settings menu contains adjustable timers for various unit functions. This menu is also available in the Commission Unit menu
(Main Menu \ Commission Unit \ Timer Settings) .
Table 55: Main Menu \ Service Menus \ Timer Settings
Menu Display Default
Name
Start Up 180s
Recirculate 180s
Clg Stg Time 5min
Htg Stg Time 5min
Zero OA Time 0min
Tnt Ovrd Incr 120min
Post Heat 0s
Low DAT 6min
Service Time 0min
DAIKIN APPLIED
Range
30-1800s
60-3600s
5-60min
2-60min
0-240min
0-300min
0-180s
0-60min
0-60min
Description
Startup is an adjustable item that sets the time in seconds that
the unit will perform its startup operation .
Recirculate is an adjustable item that sets the time in seconds
that the unit operates with only the fan, recirculating the building
air upon unit start up .
Clg Stg Time is an adjustable item used to set a minimum time
period between compressor stage changes .
Htg Stg Time is an adjustable item used to set a minimum time
period between heating stage changes .
Zero OA Time is an adjustable item that sets the time in minutes
that the outdoor air damper stays at a zero position upon unit
start up .
Tnt Ovr Incr is an adjustable item that sets the amount of time
that the unit will go into operation when the tenant override
function is activated . Tenant override can be activated by the
space sensor button, the network occupancy mode parameter or
the keypad Occ Mode= parameter .
Post Heat is an adjustable item that sets the duration of the post
heat function available on VAV units .
Low DAT is an adjustable item that sets the duration of a time
period upon unit start up during which the Low Discharge
Temperature fault is ignored . This may be particularly important
in colder climates when a unit has been off for a significant
time period during which the unit, including the discharge air
temperature sensor, has become very cold . This time period
allows the unit to run long enough to turn the unit heat on and
warm the discharge sensor above the alarm limit, preventing
nuisance unit alarm shutdown . This time period begins when the
supply fan starts .
Service Time is an adjustable item that sets the amount of time
the internal control timers can be temporarily sped up .
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MICROTECH UNIT CONTROLLER