Features Of This Dehumidifier - Mitsubishi Electric MJ-EV38HR-A Instruction Manual

Features of This Dehumidifier

˜ Room temperature may rise
2–6°C during operation.
The dehumidifier does not have a cooler function. Due
to heat produced during operation, the room temperature
may rise 2–6°C. As a result, the unit may blow warm air,
but this is not due to a malfunction. (During winter, the
air may not feel warm as the temperature is below body
temperature.)
How does the dehumidifier work?
If you pour cold water into a cup, the air around it
becomes cold, causing water droplets to form on the
surface of the cup.
The dehumidifier takes advantage of this phenomenon
to remove moisture from the air.
1 The unit draws air from the room, cools it with its
cooling coil, causing the moisture to transform into
water droplets.
2 The water droplets fall into the water tank.
3 Dehumidified air is heated by the re-heating
coil, and then blown out.
The humidity of the room is thus reduced by repeating
the above steps.
Cooling Coil
Moist Air
1
Inverter
Compressor
˜ The amount of dehumidifying
becomes less in winter.
When the temperature and humidity are low, the amount of water
collected is decreased.
In winter, because the temperature is lower than in summer, the effect of
the dehumidifier is greatly reduced as shown in the graph on the right.
Although only a little water collects in the tank, this is not a malfunction.
Summer (humidity)
˜ Defrosting operation
When the room temperature drops to about 15°C, defrosting operation starts.
The operation runs every 70 minutes. Compressor stops, airflow is delivered and the melted frost then drips into the
water tank.
6
Dry (Warm) Air
3
Re-heating Coil
Water Tank
2
Winter (dampness)
˜ Inverter
The inverter is a device that controls the rotational speed of the
compressor motor. When an operation starts immediately or in
other situations, strong dehumidification is performed at a high
motor speed. When the humidity becomes stable, the motor
speed is decreased to continue the operation economically.
˜ The unit can operate in a room
temperature range of 5–35°C.
If the room temperature exceeds 35°C, the unit may
operate in blower mode or increase the airflow. This is
because the temperature within the unit rises causing
the protection mechanism to operate. In order to lower
the internal temperature of the unit, use the unit with the
swing stopped and louvre vertical.
z If the temperature is below 5°C, only the blower is
z
operational to prevent the extracted water freeze.
˜ The humidity reading on
the unit may differ from a
hygrometer in the same room.
Even in the same room, temperature and humidity levels may
differ from place to place. If the hygrometer and the unit are in
different parts of the room, the humidity levels are prone to differ.
Moreover, humidity levels differ between places that have good
and no airflow.
Use the reading on the unit as an estimate.
Value for HIGH when humidity is 80%
38
30
20
10
0 5 10
z The values shown on the graph were measured at
constant temperature and humidity and do not reflect
values obtained in actual usage conditions.
z The amount of dehumidifying varies depending on
the operation mode.
<Cause>
1. Inconsistencies
in temperature
and humidity
2. Difference in
location
3. Difference in
hygrometer
precision
15 20 25 30
Room temperature (°C)