Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 41

7-2. DRY operation
Control modes
1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)
1. Compressor
1-2. Frozen prevention control
1-3. Frozen protection
2. Fan Indoor fan operation controlled depends on the compressor conditions.
Note: Remote controller setting is not acceptable.
3. Drain pump
Same control as COOL operation
4. Vane
Same control as COOL operation
(up/ down vane change)
5. Louver
Remote controller setting
(Left/ right change)
7-3. FAN operation
Control modes
1. Compressor None (always stopped)
Set by remote controller.
2. Fan
3.1 Drain pump control
3. Drain pump
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
2 ON for 6 minutes after the drain sensor is determined to be submerged using the
3 ON for 6 minutes after indoor piping (liquid piping) temperature - indoor intake
(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
4. Vane
on the vane's downward blow setting.
(up/ down vane change)
Setting the compressor operation time by the thermoregulating signal
and the room temperature (TH1).
Thermoregulating signal ON Room temperature ] desired temperature +1:
Thermoregulating signal OFF Room temperature [ desired temperature
Thermoregulating
Room temp.
signal
ON
Over 18:
OFF
Less than 18: Compressor operation stop
No control function
Same control as COOL operation
Compressor
Fan speed
ON [Low]
Stop (
OFF
Number of fan speeds
4 [Low], [Medium2], [Medium1], [High]
[Low]
2
another operation mode (FAN).
liquid level detection method given below.
temperature [ -10:, AND the drain sensor input is at the short or open level.
Control details
Operating OFF time
time (min)
(min)
9 3
3
10
1)
Control details
Fan speed notches
[High]
41
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.
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 .
:
1 Model which is
installed louver
function.
Remarks