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INDOOR UNIT CONTROL CIRCUIT (CONTINUED)
NO.
12
Item
HA control
Overview of specifications
(1) When connected to a remote control system (tele-control
or remote on/off interface), operation ON/OFF can be
controlled by the HA signal input.
(2) Outputs operation ON/OFF status to the HA output
terminal.
(3) HA signal input/output specifications conform to the JEMA
standard.
Remarks
A connector (separately avail-
able) is required when using the
HA terminal CH61 for remote ON/
OFF control.
When group operation is in use,
connect the connector to either
header or follower indoor unit.
(1) Power-saving operation is available in the AUTO mode.
(2) The set temperature is corrected using various sensor data
within the range where comfort is maintained.
(3) By using various sensor data including room temp. Ta,
outside air temp. To, fan speed, and indoor unit heat
exchange sensor temp.
Tc, 20 minute data is averaged to calculate a set tempera-
ture correction value.
(4) The set temperature is corrected every 20 minutes with the
following shift range.
Cooling
:
+1.5 to -1.0K
Heating
:
-1.5 to +1.0K
(1) The scope of operation by remote controller on the indoor
unit side can be switched by the setting of remote controller.
(2) Scope of operation by remote controller on the indoor unit
side
[Individual]
: All settings and ON/OFF operations are available.
[Central 1]
: ON/OFF operations are disabled.
[Central 2]
: ON/OFF operations, operation mode selection,
and temperature setting are disabled.
[Central 3]
: Operation mode selection and temperature
setting are disabled.
[Central 4]
: Operation mode selection is disabled.
(1) Transmits filter replacement signal to remote controller for
indication on the LCD when accumulated operation hours
of indoor unit fan exceeds the specified time (150 hours).
(2) Clears accumulation timer upon receiving the filter reset
signal from remote controller. At this time, when the
specified time has already passed, the accumulated time
is reset and the filter sign disappears from the LCD.
Filter sign
indication
(unavailable for
wireless type)
Central control
mode switching
Power-saving
control
13
14
15
“FILTER” lamp ON
No indication
“
” display flash
“
” display flash
“
” display flash
“
” display flash
When wired remote controller is
not used, operation range is the
same as above though lamp
indication remains unchanged.
If an unavailable operation mode
is transmitted from wireless
remote controller, it is indicated
with a reception sound “pi, pi, pi,
pi, pi” (5 times).
