How To Operate Fixed-Frequency Operation; Outdoor Low Pressure And Outdoor Unit Current; Cool Operation; Outdoor Low Pressure - Mitsubishi Electric MUZ-AP25VG - E1 Service Manual

9-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION

<Test run operation>
1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL: Press once, HEAT: Press twice).
2. Test run operation starts and continues to operate for 30 minutes.
3. Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode.
4. Indoor fan operates at High speed.
5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (operation frequency of compressor varies).
6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on
remote controller.

9-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

COOL operation

Both indoor and outdoor unit are under the same temperature/
humidity condition.
Operation: TEST RUN OPERATION (Refer to 9-3.)

Outdoor low pressure

MUZ-AP25VG
MUZ-AP25VGH
2
(kgf/cm [Gauge])(MPa [Gauge])
1.5
15
1.3
13
1.1
11
0.9
9
0.7
7
0.5
5
15 20
50
Ambient temperature(°C)
Ambient humidity(%)
MUZ-AP50VG
MUZ-AP50VGH
(kgf/cm 2 [Gauge])(MPa [Gauge])
1.0
10
0.9
9
0.8
8
0.7
7
0.6
6
0.5
5
15 20
50
Ambient temperature(°C)
Ambient humidity(%)
NOTE:
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/cm
OBH789
MUZ-AP35VG
MUZ-AP35VGH
2
(kgf/cm [Gauge])(MPa [Gauge])
15
13
11
9
7
5
25 30 35
60 70
25 30 35
60 70
Dry-bulb temperature (°C)
20
25
30
(kgf/cm
1.5
1.3
1.1
0.9
0.7
0.5
15 20 25 30 35
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
2
[Gauge])
18
Relative humidity (%)
50
60
70
MUZ-AP42VG
MUZ-AP42VGH
2
[Gauge])(MPa [Gauge])
1.5
15
1.3
13
1.1
11
0.9
9
0.7
7
0.5
3
15 20 25
50 60
Ambient temperature(°C)
Ambient humidity(%)
30 35
70