Toshiba RAV-SM562KRT-E Service Manual page 19

NO. Item
3 Room temperature
control
4 Capacity auto
control
(GA control)
5 COOL/HEAT/
AUTO control
Overview of specifications
(2) The set temperature for HEAT operation can be corrected by code
No. 06.
Set data
Correction of set temp. +0°C +2°C +4°C +6°C
Factory setting
Set data 2
* 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
Ta(n-1)–Ta(n) : Room temp. variation
(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
Ta(n)–Ta(n_1) : Room temp. variation
(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.
Ta
COOL
(˚C)
+1.5
Tsc
or
Tsh
(COOL OFF)
-1.5
(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.
0 2 4
n : Number of detection times
n–1 : Number of detection times
(90 seconds before)
n : Number of detection times
n–1: Number of detection times
(60 seconds before)
After 10 minutes pass from
thermo sensor OFF,
operation mode changes
(COOL ON)
from HEAT (thermo sensor
OFF) to COOL if Ta exceeds
Tsh +1.5.
( ) shows an example of
HEAT
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.
– –
18
Remarks
Heat intake temperature
shift
(When unit's temperature
6
sensor is used)
Tsc : COOL set temp.
Tshc : HEAT set temp. +
room temp. control/
correction