Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 45

7-5. AUTO operation
Control modes
HEAT mode for room temperature < Desired temperature
1. Initial value of
COOL mode for room temperature ] Desired temperature
operation mode
(1) HEAT mode
2. Mode change
Room temperature ] Desired temperature + 2deg. or 15 min. has passed
(2) COOL mode
Room temperature [ Desired temperature - 2deg. or 15 min. has passed
3. COOL mode
Same control as cool operation
4. HEAT mode
Same control as heat operation
7-6. When unit is stopped Control mode
Control modes
1.1 Drain pump control
1. Drain pump
The drain pump turns ON for the specified amount of time when
any of the following conditions is met (regardless of whether the
compressor is ON or OFF)
1 ON for 3 minutes after the operation mode is switched from COOL
or DRY to another operation mode (HEAT mode).
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 [ -10deg, 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.)
1.2 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 [ -10deg
(except during defrosting)
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.
Control details
COOL mode
HEAT mode
Control details
45
Remarks
This mode is provide in the outdoor unit.
The indoor unit follows the instruction
from the outdoor unit.
This mode is provide in the outdoor unit.
The indoor unit follows the instruction
from the outdoor unit.
Remarks