Mitsubishi Electric MU-A08ND-c1 Service Manual page 13

How to measure the indoor air wet/dry-bulb temperature difference
1. Attach at least 2 sets of wet and-dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets
of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air
speed is high.
2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake.
Cover the thermometers to prevent direct rays of the sun.
3. Check that the air filter is cleaned.
4. Open windows and doors of the room.
5. Press the EMERGENCY OPERATION switch once to start the EMERGENCY COOL MODE.
6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
7. 10 minutes later, measure temperature again and check that the temperature does not change.
INDOOR UNIT
7.9 7.0
11.2 12.8
7.3 6.5
10.2 11.6
6.6 5.9 9.3 10.5
6.0 5.4
8.4 9.5
5.4 4.8 7.5 8.5
4.8 4.3
6.7 7.5
OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
COOL operation
1 Both indoor and outdoor units are under the same temperature/humidity condition.
Dry-bulb temperature (:)
20
25
30
2 Air flow should be set at MAX.
3 The unit of pressure has been changed to MPa on the international system of units(SI unit system).
The conversion factor is : 1(MPa [Gauge]) =10.2(kgf/f
Wet-and dry-bulb
thermometers
Indoor intake air WB temperature (:)
Outdoor intake air DB temperature (:)
Relative humidity (%)
50
60
70
OUTDOOR UNIT
Indoor intake air WB temperature (:)
Outdoor intake air DB temperature (:)
f [Gauge])
13
Wet and dry-bulb
thermometers