Daikin MicroTech III DPS - Commission Unit: Defrost Setup; Defrost Operation States; Defrost Initiation and Methods

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www.DaikinApplied.com 29 OM 1263 • MICROTECH UNIT CONTROLLER
Defrost Set-Up
(See page 67 for more information)
Table 16: Defrost Set Up Menu
Item Display
Name
Default
Setting
Range
Password
Level
Defrost State= —
O󰀨
4
Init
Exec
Term
Manual DF= No
No
4
Yes
MinCmpOpTm= 10min 0 – 60min 2
MinAccCmpTm= 40min 0 – 300min 2
MaxFrostTm= 120min 40 – 360min 2
Defrost Temp= — -64 – 64°F 2
Tdef Adj= 0°F -4.0 – 4.0°F 2
CmpOpTm= — 0 – 50000.0min 2
AccCmpOpTm= — 0 – 50000.0min 2
LoFrstAccTm= — 0 – 50000.0min 2
HiFrstAccTm= — 0 – 50000.0min 2
Defrost State (Heat Pump only) is a status only item which
displays the current state of defrost operation. The states are
O󰀨, Initialization, Execute and Terminate.
Manual DF (Heat Pump only) is an adjustable item that allows
for manual initiation of defrost operation.
MinCmpOpTm (Heat Pump only) is an adjustable item that
sets minimum time that compressor heating operation must
active in the current run cycle before defrost operation can be
initiated.
MinAccCmpTm (Heat Pump only) is an adjustable item that
sets minimum accumulated compressor heating run time since
the last defrost cycle before defrost operation can be initiated.
MaxFrostTm (Heat Pump only) is an adjustable item that
denes the maximum time during periods of potential coil
frosting that can accumulated without initiating a defrost cycle.
Defrost Temp (Heat Pump only) is a status only item
which displays the e󰀨ective temperature value the defrost
temperature input must fall below before defrost operation is
initiated base on temperature.
Tdef Adj (Heat Pump only) is an adjustable item that allows a
manual bias adjustment to be used in the internal calculation
of the Defrost Temp. Increasing this value would cause defrost
to be initiated at a warmer defrost temperature value and vise
versa.
CmpOpTime (Heat Pump only) is a status only item which
displays the time that compressor heating operation has been
active in the current run cycle.
AccCmpOpTm (Heat Pump only) is a status only item which
displays the accumulated time of compressor heating operation
since the last defrost cycle.
LoFrstAccTm (Heat Pump only) is a status only item which
displays the accumulated time since the last defrost cycle of
low frost potential.
HiFrstAccTm (Heat Pump only) is a status only item which
displays the accumulated time since the last defrost cycle of
high frost potential.