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the microcomputer of indoor unit become ineffective.
(14) Cooling, dehumidifying frost protection
(a)
To prevent frosting during cooling mode or dehumidifying mode operation, the of compressor speed is reduced if
the indoor heat exchanger temperature (detected with Thi-R) drops to 1.0 °C or lower at 4 minutes after the start of
compressor operation. If the indoor unit heat exchanger temperature is 1.0 °C or lower after 1 minutes, the compressor
speed is reduced further. If it becomes 2.5 °C or higher, the control terminates. When the indoor heat exchanger
(c) Operation check mode
temperature has become as show below after reducing the compressor speed, it is switched to the fan operation. For the
selection of indoor fan speed, refer to item 2).
There is no communication with the outdoor unit but it allows performing operation in respective modes by operating the
remote control.
(d) Drain pump test run mode (Except FDK)
As the drain pump test run is established, the drain pump only operates and during the operation protective functions by
the microcomputer of indoor unit become ineffective.
(14) Cooling, dehumidifying frost protection
(b) Selection of indoor fan speed
(a) To prevent frosting during cooling mode or dehumidifying mode operation, the compressor-OFF if the indoor heat
If it enters the frost prevention control during cooling operation (excluding dehumidifying), the indoor fan speed is
exchanger temperature (detected with Thi-R) drops to 1.0 °C or lower at 4 minutes after the compressor-ON. If the indoor
switched.
unit heat exchanger temperature is 1.0 °C or lower after 5 minutes, the indoor unit is controlled compressor-OFF. If it
(i) When the indoor return air detection temperature (detected with Thi-A) is 18°C or higher and the indoor heat
becomes 10°C or higher, the control terminates. When the indoor heat exchanger temperature has become as show, the
exchanger temperature (detected with Thi-R) detects the compressor frequency drop start temperature A°C+1°C, of
indoor unit send outdoor unit the "Anti-frost" signal.
indoor fan speed is increased by 20min
• Frost prevention temperature setting can be selected with the
(ii) If the phenomenon of (i) above is detected again after the acceleration of indoor fan, indoor fan speed is increased
indoor unit function setting of the wired remote control.
further by 20min
Note (1) Indoor fan speed can be increased by up to 2 taps.
Item
• Compressor frequency drop start temperature
Temperature - Low (Factory default)
Temperature - High
Item
Temperature - Low (Factory default)
Temperature - High
(b) Selection of indoor fan speed
Note (1) Frost prevention temperature setting can be selected with the indoor unit function setting of the wired remote control.
If it enters the frost prevention control during cooling operation (excluding dehumidifying), the indoor fan speed is
(15) Heating overload protection
switched.
(i) When the indoor return air detection temperature (detected with Thi-A) is 18°C or higher and the indoor heat
(a)
If the indoor heat exchanger temperature (detected with Thi-R) at 63°C or higher is detected for 2 seconds continuously,
exchanger temperature (detected with Thi-R) detects the compressor frequency drop start temperature A°C+1°C, of
the compressor stops. When the compressor is restarted after a 3-minute delay, if a temperature at 63°C or higher is
indoor fan speed is increased by 20min
detected for 2 seconds continuously within 60 minutes after initial detection and if this is detected 5 times consecutively,
(ii) If the phenomenon of (i) above is detected again after the acceleration of indoor fan, indoor fan speed is increased
the compressor stops with the anomalous stop (E8). Anomalous stop occurs also when the indoor heat exchanger
further by 20min
temperature at 63°C or higher is detected for 6 minutes continuously.
Note (1) Indoor fan speed can be increased by up to 2 taps.
• Compressor frequency drop start temperature
Hs > 50%
Item
Symbol
A
(b) Indoor fan speed selection
B
If, after second detection of heating overload protection up to fourth, the indoor fan is set at Me and Lo taps when the
Note (1) Frost prevention temperature setting can be selected with the indoor unit function setting of the wired remote control.
compressor is turned ON, the indoor fan speed is increased by 1 tap.
(15) Anomalous fan motor
(a) After starting the fan motor, if the fan motor speed is 200min
within 60 minutes, then fan motor stops with the anomalous stop (E16).
(b) If the fan motor fails to reach at -50 min
(16) Plural unit control – Control of 16 units group by one remote control
(a) Function
One remote control can control a group of multiple number of unit (Max. 16 indoor units). "Operation mode" which is set
by the remote control can operate or stop all units in the group one after another in the order of unit. No.
protective function of each unit function independently.
Note (1)
Unit No. is set by SW1, SW2, and SW5-2 on the indoor control PCB.
Fan operation
1.0
Indoor heat exchanger temperature (°C)
.
-1
.
-1
Symbol
A
1.0
Symbol
A
2.5
1.0
2.5
.
-1
.
-1
Compressor ON
Low
High
56
Indoor heat exchanger temperature (°C)
1.0
2.5
2.5
4.0
-1
less than the required speed, it stops with the anomalous stop (E20).
-
172
-
Cooling operation
10
Thermostat-OFF
Indoor heat exchanger temperature (°C)
Compressor OFF
Hs ≦ 50%
Item
Low
63
Symbol
A
-0.5
B
1.0
-1
or less is detected for 30 seconds continuously and 4 times
125
-
-
'20 • KX-T-373
Symbol
A
Model
SRC40~60
4
FDC100~140
4
Thermostat-ON capable
5 minutes
A
10
High
1.0
2.5
(1)
. Thermostat and
B
C
1
1.0
1
1.0
Symbo
Model
SRC40~60
FDC100~140
- Quick Links:
- 7-Segment Display: E56
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