Overview of specifications
(2) The set temperature for HEAT operation can be corrected by code
No. 06.
Factory setting
* When use of remote controller sensor is set (with DN32), no
correction is performed.
(1) Issues instruction of operating frequency to outdoor unit according
to the difference between Ta and Ts.
(2) COOL operation
Calculates room temp. difference between Ta and Ts as well as
room temp. variation every 90 seconds to find correction value of
specified operating frequency and to correct the current operating
frequency.
Ta(n)–Ts(n) : Room temp. difference
n
: Number of detection times
Ta(n-1)–Ta(n) : Room temp. variation
n–1 : Number of detection times
(90 seconds before)
(3) HEAT operation
Calculates room temp. difference between Ta and Ts as well as
room temp. variation every 60 seconds to find correction value of
specified operating frequency and to correct the current operating
frequency.
Ts(n)–Ts(n)
: Room temp. difference
n
: Number of detection times
Ta(n)–Ta(n_1) : Room temp. variation
n–1: Number of detection times
(60 seconds before)
(4) DRY operation
The frequency correction control is the same as that for COOL
operation.
However, the maximum frequency is limited to S6 or so.
Note) When LOW fan speed is set, the maximum frequency is
limited to SB or so.
(1) Switching between COOL and HEAT is determined based on the
following control.
(2) The GA control after determination of operation mode follows the
description in No. 4.
(3) The room temperature control and temperature correction follow
the descriptions in No. 3 and No. 15.
NO.
3
4
5
Item
Room temperature
control
Capacity auto
control
(GA control)
COOL/HEAT/
AUTO control
Remarks
Heat intake temperature
shift
(When unit’s temperature
sensor is used)
Tsc : COOL set temp.
Tshc : HEAT set temp. +
room temp. control/
correction
Set data
0
2
4
6
Correction of set temp. +0°C +2°C +4°C +6°C
Set data
2
+1.5
Tsc
-1.5
Tsh
Ta
or
(˚C)
After 10 minutes pass from
thermo sensor OFF,
operation mode changes
from HEAT (thermo sensor
OFF) to COOL if Ta exceeds
Tsh +1.5.
( ) shows an example of
COOL ON/OFF.
After 10 minutes pass from
thermo sensor OFF,
operation mode changes
from COOL (thermo sensor
OFF) to HEAT if Ta lowers
below Tsc -1.5.
COOL
(COOL ON)
(COOL OFF)
HEAT
–
18
–
