Toshiba RAV-SM304SDT-TR Service Manual page 53

No. Item
3 Room temp. 2) Using the Item code 06, the setup temperature in heating
control
(Continued)
4 Automatic 1) Based on the difference between Ta and Ts, the operation
capacity control
2) Cooling operation
(GA control)
3) Heating operation
4) Dry operation
Note) When LOW is set up, the maximum frequency is
5 Automatic 1) The judgment of selecting COOL/HEAT is carried out as
cooling/heating
control
2) For the automatic capacity control after judgment of
3) For temperature correction of room temp. control in
Outline of specifications
operation can be corrected.
Setup data
Setup temp. correction
Setting at shipment
Setup data 2
frequency is instructed to the outdoor unit.
Every 90 seconds, the room temperature difference
between temperature detected by Ta and Ts and the
varied room temperature value are calculated to obtain
the correction value of the frequency command and then
the present frequency command is corrected.
Ta (n) – Ts (n) : Room temp. difference
n : Counts of detection
Ta (n-1) – Ts (n) : Varied room temp. value
n – 1 : Counts of detection of 90 seconds before
Every 1 minute (60 sec.), the room temperature differ-
ence between temperature detected by Ta and Ts and the
varied room temperature value are calculated to obtain
the correction value of the frequency command and then
the present frequency command is corrected.
Ts (n) – Ta (n) : Room temp. difference
n : Counts of detection
Ta (n) – Ta (n – 1): Varied room temp. value
n – 1 : Counts of detection of 1 minute before
The frequency correction control is same as those of the
cooling operation.
However the maximum frequency is limited to approxi-
mately "S6".
limited to approximately "SB".
shown below. When +1.5 exceeds against Tsh 10 minutes
and after thermo.-OFF, heating operation (Thermo. OFF)
exchanges to cooling operation. Description in the
parentheses shows an example of cooling ON/OFF.
Ta
Cooling
(˚C)
+1.5
Tsc
or
Tsh
(Cooling OFF)
-1.5
When –1.5 lowers against Tsc 10 minutes and after
thermo. OFF, cooling operation (Thermo. OFF) exchanges
to heating operation.
cooling/heating, see Item 4.
automatic heating, see Item 3.
0 2 4
+0°C +2°C +4°C +6°C
(Cooling ON)
Heating
– 53 –
Remarks
Shift of suction
temperature in heating
operation
6
Tsc: Setup temp. in
cooling operation
Tsh: Setup temp. in
heating operation
+ temp. correction of
room temp. control