Determining Supplemental Heat Status (Heat Pump Only); Determining Economizer Status; Determining Cooling Capacity; Determining Heat Capacity - Daikin DPS Installation And Maintenance Manual

Determining Supplemental Heat
Status (Heat Pump only)
SuplHtgStatus is a status item which indicates whether or not
the secondary or supplemental unit heat source is currently
allowed . This is gas, electric, hot water or steam heat .
The following are descriptions of the heating status states:
Enabled
Control Mode is not set via the keypad to fan only or cool only
Control Mode is set via the keypad to auto and heating is not
disabled via a network command
The outdoor air temperature (OAT) is cool enough (below 55°F
default) for supplemental heating operation .
Off Ambient
The OAT is too high for supplemental heating operation . The
OAT becomes too high for heat operation when it rises above
the supplemental heat high OAT lock out set point . The OAT
becomes low enough for heat operation when it drops below
the supplemental heat high OAT lock out set point by more
than the heating lockout differential .
Off Network
Control Mode is set via the keypad to auto and heating is
disabled via a network command .
Off Manual
Control Mode is set via the keypad to fan only or cool only .

Determining Economizer Status

Econo Status is a status item which indicates whether or
not economizer operation is currently allowed . If economizer
operation is disabled, the reason is indicated .
The following are descriptions of economizer status states .
Economizer is enabled if all the following are true:
• Economizer capability is provided
• Dehumidification operation is not enabled
• The unit is configured for airside economizer, the enthalpy
switch input indicates low enthalpy, and the outdoor air
temperature (OAT) is low enough for operation
None
Economizer capability is not provided .
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Off Ambient
Economizer status is Off Ambient if any of the following
conditions exist:
• The unit is configured for airside economizer and the
outdoor air temperature (OAT) is too high for operation .
• Unit is configured for airside economizer and the outdoor
air temperature (OAT) sensor is unreliable .
Off Network
Economizer operation is disabled via a network command .
Off Dehumidification
Economizer operation is disabled if dehumidification operation
is enabled .

Determining Cooling Capacity

Clg Capacity is a status item which indicates the percentage of
the unit maximum cooling capacity currently operating .

Determining Heat Capacity

Htg Capacity is a status item which indicates the percentage
of the unit maximum primary heating source that is currently
operating . On heat pump units this is the compressor heating
capacity . On non-heat pump units this is the gas, electric or hot
water heating capacity .
Determining Supplemental Heat
Capacity (Heat Pump only)
Supl Htg Cap is a status item which indicates the percentage of
the unit maximum secondary or supplemental heating source
that is currently operating . This is the gas, electric or hot water
heating capacity .
Determining Supply Air Fan
Capacity
SAF Speed is a status only item which indicates the supply
air fan capacity . 0-100% of maximum speed is indicated if the
unit is equipped with a variable volume supply air fan . 100% is
indicated if the supply fan is constant volume and is running .

Determining RF/EF Capacity

RF/EF capacity is a status only item which indicates the current
exhaust fan capacity . 0-100% of maximum speed is indicated
if the unit is equipped with a variable volume exhaust fan .
100% is indicated if the exhaust fan is constant volume and is
running .
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