Design Technical Manual

Table Of Contents
System gure example
76°F
80°F
74°F
84°F
68°F
Away
Custom
Auto
Auto
Cool
Heat
Office
Set Temp.
Mode
MenuStatus
Vacation
Fan
Fri 10:00AM
Room Temp.
Cool
Heat
82˚F
(28˚C)
88˚F
(31˚C)
External input wire
Except Indoor unit and
External wire (service
parts) all other items are
eld supplied.
Indoor
Temperature
Outdoor
Temperature
Relay
Indoor unit
External controller
Damper motor
Outdoor
thermistor
Indoor
thermistor
Operation status
Outdoor temp. < Indoor temp. : ON
Outdoor temp. > Indoor temp. : OFF
Normal*
Forced thermostat off
ON
ON
OFF
OFF
Signal detected by
external controller
Command from
external controller
EEV
Fan
Indoor
unit
* Normal means that Indoor unit is continues to operate until [Forced thermostat off] signal received, at condition
which are set by central and individual controller or detected by thermo sensors of indoor unit.
Indoor unit continues to operate until [Forced thermostat off] signal received, at condition which are set by central
and individual controller or detected by thermo sensors of indoor unit. Once [Forced thermostat off] signal re-
ceived, Indoor unit start operation under Fan mode.
- (08 - 19) -
EXTERNAL INPUT
& OUTPUT
EXTERNAL INPUT
& OUTPUT