Hi Power Mode; High-Temperature Limit Control; Low-Temperature Limit Control - Toshiba RAS-24NKHD-E5 Service Manual

7-3. Hi PO WER Mode
([Hi PO WER] b utton on the remote
contr ol is pressed.)
When [Hi PO WER] b utton is pressed while the indoor
unit is in A uto , Cooling or Heating oper
PO WER mar k is indicated on the displa
control and the unit oper ates as f
(1) A utomatic oper ation
·
The indoor unit oper
current operation.
(2) Cooling operation
• The setting temperature drops 3°C.
(The value of the setting temperature on the
remote control does not change.)
• If the room temperature is higher than the
setting temperature by 3.5°C or more, the
horizontal louver moves to the Hi POWER
position automatically. Then when the room
temperature is 1°C less than the setting
temperature the horizontal louver returns
automatically.
• FAN speed : [AUTO]
If the room temperature is higher than the
setting temperature by 3.5°C or more, the air
conditioner operates at maximum airflow level.
If the room temperature is higher than the
setting temperature by less than 3.5°C, the air
conditioner operates at normal airflow level.
• FAN speed : One of 5 levels
If the room temperature is higher than the
setting temperature by 3.5°C or more, the air
conditioner operates at higher consecutive
airflow level. If the room temperature is higher
than the setting temperature by less than 3.5°C,
the air conditioner operates at normal airflow
level.
(3) Heating operation
·
The preset temper
(The v alue of the preset temper
remote control does not change
·
The indoor unit oper
mode e xcept the preset temper
(+2 °C).
(4) The Hi PO WER mode can not be set in Dr
only operation.
ation, Hi
y of the remote
ollo ws .
ates in according to the
ature increases 2 °C,
ature on the
.)
ates in nor mal heating
ature is higher
y or F

7-4. High-Temperature Limit Control

*Heat pump model only
The microcontroller detects the indoor heat exchanger
temperature to prevent pressure of a refrigerating cycle
from increasing excessively.
The compressor and outdoor fan motor are controlled
as shown in Fig. 7-4-1.
Compressor Outdoor fan
OFF
OFF
ON OFF
ON
ON

7-5. Low-Temperature Limit Control

The microcontroller detects the indoor heat exchanger
temperature to prevent the indoor heat exchanger from
freezing.
The compressor and outdoor fan motor are controlled
as shown in Fig. 7-5-1.
Heat exchanger
temperature
(°C)
6
2
7-6. Defrost Operation *Heat pump model only
When the indoor unit is in heating operation, if the
refrigerant evaporation temperature detected by the
outdoor heat exchanger sensor is under the specified
temperature, the outdoor unit starts the defrosting
operation. At this time, the 4-way valve relay and the
outdoor fan motor are turned off. The indoor fan motor
is also turned off by the cold draft preventing control of
an the indoor microcomputer. Then, [PRE. DEF.] lamp on
the indoor unit comes on.
The defrosting operation stops and the 4-way valve
relay, outdoor fan motor and the indoor fan motor are
turned on automatically when the refrigerant
evaporation increases to the specified temperature, or
when the defrosting time is over 12 minutes.
– 23 –
FILE NO. SVM-06010
Heat exchanger
temp.
(°C)
62
55
54
Fig. 7-4-1
Compressor Outdoor fan
ON
Less than continues
for 5 minutes
OFF
Fig. 7-5-1