Toshiba RAV-GM301ATP-E, Service Manual

Page: 29 / 113

–1.5
Tsc or Tsh
+1.5
Heating
(Cooling OFF)
(Cooling ON)
Cooling ˚C
No.
3
4
5
Item
Room temp.
control
(Continued)
Automatic
capacity control
(GA control)
Automatic
cooling/heating
control
Outline of specifications
2) Using the CODE No. 06, the setup temperature in heating
operation can be corrected.
Setting at shipment
1) Based on the difference between Ta and Ts, the operation frequency is instructed to
the outdoor unit.
2) Cooling operation
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
3) Heating operation
Every 1 minute (60 sec.), 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.
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
4) Dry operation
The frequency correction control is same as those of the cooling operation.
However the maximum frequency is limited to approximately “S6”.
Note) When LOW is set up, the maximum frequency is limited to approximately “SB”.
1) The judgment of selecting COOL/HEAT is carried out as
shown below. When +1.5°C 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.
When –1.5°C lowers against Tsc 10 minutes and after thermo. OFF, cooling
operation (Thermo. OFF) exchanges to heating operation.
2) For the automatic capacity control after judgment of cooling/heating, see Item 4.
3) For temperature correction of room temp. control in automatic heating, see Item 3.
Remarks
Shift of suction
temperature in heating
operation
Tsc: Setup temp. in
cooling operation
Tsh: Setup temp. in
heating operation
+ temp. correction
of room temp. control
SET DATA
3
SET DATA
Setup temp.
correction
0°C 1°C 2°C
3°C
• When use of remote controller sensor is set (with DN32),
no correction is performed.
0
2
3 4 5
6
4°C 5°C
FILE NO. SVM-18059
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