41
7-2. DRY operation
Control modes
Control details
1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)
Setting the compressor operation time by the thermoregulating signal
and the room temperature (TH1).
Thermoregulating signal ON Room temperature
]
desired tempe1
:
Thermoregulating signal OFF Room temperature
[
desired temperature
1-2. Frozen prevention control
No control function
Indoor fan operation controlled depends on the compressor conditions.
3. Drain pump
1. Compressor
Remarks
✻
1
The thermoregulating
function is provided in
the outdoor unit.
The indoor unit
transmits the indoor
room temperature and
set temperature data to
outdoor unit, then the
outdoor unit controls
thermoregulation.
Room temp.
Thermoregulating
signal
Operating
time (min)
OFF time
(min)
Less than 18
:
Over 18
:
ON
9
3
OFF
10
3
Compressor operation stop
1-3. Frozen protection
Same control as COOL operation
2. Fan
Note: Remote controller setting is not acceptable.
Compressor
Fan speed
ON
OFF
[Low]
Stop (
✻
1)
✻
1 Note that even when
the compressor is OFF, the
unit starts operating in
[LOW] if the start condition
below is met.
Start condition: The piping
temperature (fluid piping or
2-phase piping) has fallen
to 1
:
or less.
Release condition: The
piping temperature (fluid
piping or 2-phase piping)
has returned to at least
10
:
.
4. Vane
(up/ down vane change)
Same control as COOL operation
Same control as COOL operation
5. Louver
(Left/ right change)
Remote controller setting
✻
1 Model which is
installed louver
function.
Control modes
Control details
None (always stopped)
Set by remote controller.
3. Drain pump
1. Compressor
Remarks
2. Fan
Number of fan speeds
Fan speed notches
4
2
[Low], [Medium2], [Medium1], [High]
[Low]
[High]
4. Vane
(up/ down vane change)
3.1 Drain pump control
The drain pump turns ON for the specified amount of time when any of the following
conditions is met:
1
ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
2
ON for 6 minutes after the drain sensor is determined to be submerged using the
liquid level detection method given below.
3
ON for 6 minutes after indoor piping (liquid piping) temperature - indoor intake
temperature
[
-10
:
, AND the drain sensor input is at the short or open level.
(If condition
2
or
3
is still being met after the drain pump has been turned ON for 6
minutes, the drain pump is kept ON for a further 6 minutes.)
3.2 Liquid level detection method
The liquid level is detected by determining whether or not the drain sensor is
submerged, based on the amount the temperature rises after self-heating the
sensor. This process is performed if any of the following conditions is met:
1
Drain pump is ON.
2
Indoor piping (liquid piping) temperature - indoor intake temperature
[
-10
:
3
Indoor piping (liquid piping) temperature or indoor intake temperature is at the
short or open level temperature.
4
Every hour after the drain pump has been switched from ON to OFF.
Same as the control performed during the COOL operation, but with no restriction
on the vane's downward blow setting.
7-3. FAN operation
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