Determining Cooling Status; Determining Heat Status - Daikin MicroTech III Operation Manuals

Determining Cooling Status

Clg Status is a status item which indicates whether or not
mechanical cooling is currently allowed . If cooling is disabled,
the reason is indicated .
The following are descriptions of cooling status states .
Enabled
Mechanical cooling is enabled if all the following are true:
• Cooling capability is provided
• Control mode is not set via the keypad to fan only or heat
only
• Control mode is set via the keypad to auto and not
disabled via a network command
• The outdoor air temperature (OAT) on air cooled units or
the entering water temperature (EWT) on water cooled
units is high enough for operation
• Compressor operation is not disabled by an alarm
condition
None
Cooling capability is not provided .
Off Ambient
The outdoor air temperature (OAT) on air cooled units or the
entering water temperature (EWT) on water cooled units is too
low for operation .
The OAT becomes too low for operation when it drops below
the OAT cooling lockout setting . OAT becomes high enough for
operation when it rises above the OAT cooling lockout setting
by more than 2°F (adjustable - OAT Diff). The EWT becomes
too low for operation when it drops below the minimum EWT
set point . EWT becomes high enough for operation when it
rises above the minimum EWT set point by more than 2°F
(adjustable - Econo Diff).
NOTE: The OAT cooling lockout cannot be set lower than
40°F when the unit is equipped with an evaporative
condenser and should not be set lower than 50°F
unless the unit is equipped with low ambient
capability .
Off Alarm
Compressor operation is disabled by an alarm condition . This
happens when either all circuits are disabled by either a high
or low pressure alarm, when applicable the water flow switch
alarm is active, when applicable sump pump fail alarm is active
or applicable water regulating valve alarm is active .
Off Network
Control mode is set via the keypad to auto and cooling is
disabled via a network command .
Off Manual
Control mode is set to Fan Only or Heat Only via the keypad
display .
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Determining Heat Status

Htg Status is a status item which indicates whether or not
heating is currently allowed . If heating is disabled, the reason
is indicated .
The following are descriptions of heating status states:
Enabled
Heating is enabled if all the following are true:
• Heating capability is provided
• Control mode is not set via the keypad to fan only or cool
only
• Control mode is set via the keypad to auto and not
disabled via a network command
• The outdoor air temperature (OAT) is low enough for
operation
None
Heating capability is not provided .
Off Ambient
The OAT is too high for operation . The OAT becomes too
high for operation when the OAT rises above the OAT heating
lockout set point . OAT becomes low enough for operation
when the OAT drops below the OAT heating lockout set point
by more than the Heating Lockout Differential .
Off Network
Control mode is set via the keypad to auto and the unit is
disabled via a network command .
Off Manual
Control mode is set to Fan Only or Cool Only via the keypad .
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