8-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation

①Both indoor and outdoor unit are under the same temperature/humidity condition.

Dry-bulb temperature

Relative humidity(%)

20

50

25

60

30

70

➁Air flow should be set at MAX.

③The 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[Gauge] )

(kgf/F[Gauge])(MPa[Gauge]) MUH-GA20VB - E1

 

13

 

1.3

 

 

 

 

 

 

 

 

pressurelow

1.0

 

 

 

 

 

 

230V

 

 

 

 

 

 

 

 

 

 

12

 

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.1

 

 

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor

10

 

0.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.8

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.7

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

18 20

 

 

30 32 35(:)

 

15

25

 

 

 

 

 

 

 

50

60

70(%)

 

Ambient temperature(˚C)

Ambient humidity(%)

(kgf/F[Gauge])(MPa[Gauge]) MUH-GA25VB - E1

 

13

 

1.3

 

 

 

 

 

 

 

 

 

 

1.2

 

 

 

 

 

 

230V

 

 

 

 

 

 

 

 

 

 

pressure

12

 

 

 

 

 

 

 

 

 

1.1

 

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

low

1.0

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor

 

 

 

 

 

 

 

 

 

 

9

 

0.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.8

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.7

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

18 20

 

 

30 32 35(:)

 

15

25

 

 

 

 

 

 

 

50

60

70(%)

 

Ambient temperature(˚C)

Ambient humidity(%)

(kgf/F[Gauge])(MPa[Gauge]) MUH-GA35VB - E1

 

13

 

1.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

230V

 

 

 

 

 

 

 

 

 

 

 

low pressure

12

 

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.1

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.0

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor

9

 

0.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.8

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.7

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15 18 20

25

30 32 35(:)

 

 

 

 

50

60

70(%)

 

 

 

 

 

Ambient temperature(˚C)

 

 

 

 

Ambient humidity(%)

 

 

 

Outdoor unit current (A)

Outdoor unit current (A)

Outdoor unit current (A)

MUH-GA20VB - E1

4

230V

3

2

1

 

30 32 35(:)

15 18 20

25

50

60

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

MUH-GA25VB - E1

4

230V

3

2

1

 

30 32 35(:)

15 18 20

25

50

60

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

MUH-GA35VB - E1

6

230V

5

4

3

 

30 32 35(:)

15 18 20

25

50

60

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

13

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Pioneer MUH-GA25VB, MUH-GA35VB service manual MUH-GA20VB E1
Page 12 Page 14

MUH-GA20VB, MUH-GA25VB, MUH-GA35VB specifications

The Pioneer MUH-GA25VB, MUH-GA35VB, and MUH-GA20VB are a trio of advanced multimedia head units designed to enhance the in-car experience with a blend of cutting-edge technology and user-friendly features. Each model offers a unique set of functionalities tailored to meet varying needs and preferences, while maintaining high standards in audio performance and connectivity.

The MUH-GA25VB serves as a versatile entry point into Pioneer’s lineup. It features a sleek 6.2-inch touchscreen display that provides intuitive controls and easy access to music and navigation. With Bluetooth connectivity, users can enjoy hands-free calling and wireless audio streaming, enhancing safety and convenience on the road. The built-in FM/AM tuner and compatibility with USB and AUX sources allow for diverse listening options. Moreover, the MUH-GA25VB supports various audio formats, ensuring playback flexibility.

Stepping up, the MUH-GA35VB incorporates enhanced sound tuning features, including a 13-band graphic equalizer that allows users to tailor audio output to their liking. The larger 7-inch touchscreen provides an immersive interface, making navigation through multimedia content seamless. This model also supports Apple CarPlay and Android Auto, enabling users to integrate their smartphones for a more connected experience. The voice control feature allows for hands-free operation of navigation and music, making it an ideal choice for tech-savvy drivers.

At the top of the range, the MUH-GA20VB boasts superior connectivity and sound quality. It is equipped with a high-resolution audio playback capability, supporting formats up to 192 kHz/24-bit for audiophiles seeking the best sound fidelity. With dual USB ports, users can connect multiple devices simultaneously, allowing for easier management of music and charging. The hardware enhancements include high-performance DACs that result in clearer and more detailed audio reproduction. Furthermore, this model features a customizable interface, enabling users to tailor the look of the head unit to match their vehicle’s interior.

Collectively, the Pioneer MUH series – MUH-GA25VB, MUH-GA35VB, and MUH-GA20VB – presents a compelling case for anyone looking to upgrade their vehicle’s audio and multimedia capabilities. They combine sophisticated technology with user-centric designs, ensuring a remarkable in-car experience that caters to a diverse range of audiophiles and tech enthusiasts alike. Whether you prioritize straightforward functionality or advanced features, there is a model in this lineup to suit every taste and requirement.
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