Instruction manual

OM 751-4 14 www.DaikinApplied.com
desCrIptIon of operatIon
Figure 6: Complete UVC—state diagram
LUI Input
Network Input
AUTO
Mode
OFF
Mode
(State 9)
NIGHT PURGE
Mode
(State 8)
FAN ONLY
Mode
(State 10)
HEAT Mode
Manual/Forced Transition
One-way Automatic Transition
Two-way Automatic Transition
ECON
Mode
(State 3)
ECON MECH
Mode
(State 1)
CANT COOL
Mode
(State 12)
MECH COOL
Mode
(State 2)
COOL Mode
Auxiliary Heat may be used if
available
EMERGENCY HEAT
Mode
Auxiliary Heat may be
used if available
UVC Unit Modes
The UVC provides several “normal” modes of unit operation. These include: Off, Night
Purge, Fan Only, Auto, and Cool. Software model 05 does not have primary or sec-
ondary heating devices. The UVC will use auxiliary heat (if eld provided and eld con-
nected) whenever heating is required.
Normal UVC modes can contain a single state or several states depending upon the
functionality required for each particular mode. Each UVC state is assigned a number,
which can be very helpful when trying to understand which state is currently active
within the UVC. To view the current UVC state number, use the keypad/display.