Mitsubishi Electronics MSZ-GA22VA, MSZ-GA25VA, MSZ-GA35VA Indoor electronic control P.C.Board

Page 19

The unit does not operate with the remote controller.

Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch.

C Check of indoor electronic control P.C. board and indoor fan motor

Turn OFF the power supply.

Remove indoor fan motor connector CN211 and

vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply.

Does the unit operate with the remote controller? Does OPERATION INDICATOR lamp light up by pressing EMERGENCY OPERATION switch?

No

Turn OFF the power supply.

Check both “parts side” and “pattern side” of the indoor electronic control P.C. board visually.

Measure the resistance between CN211 3 and 4 of the indoor fan motor connector. Normal value is approx. 30k' to 50k'.

Yes

Measure the resistance of the horizontal vane motor coil.

Normal value is approx. 300' to 250'.

Replace the varistor(NR11) and fuse(F11).

Yes

Are the varistor(NR11) burnt No and the fuse(F11) blown?

Be sure to check both the fuse and the varistor in any case.

No

Is the fuse(F11) blown only?

Short circuit:

Replace the indoor fan motor.

Short circuit:

Replace the horizontal vane motor and the indoor electronic control P.C. board.

w1,2

Yes

 

Measure the resistance between 1(+) and 3(-) of the indoor fan motor connector (to CN211 on the indoor electronic control P.C. board) .

 

 

 

 

 

 

 

w3. Short circuit:

 

w3

 

 

No

 

Is the resistance 1M'

The indoor fan motor is

 

 

or more?

 

 

abnormal.

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

w1. The fan motor connector's1 lead wire is red, whereas 3 is black.

w2. Connect "+" of the tester to fan motor connector's1 lead wire, and "-" to 3 lead wire, otherwise the resistance cannot be measured properly.

Replace the fuse (F11) and the indoor fan motor.

Replace the fuse (F11).

Measure the cement resistance R111 on the indoor electronic control P.C. board.

Is the resistance approx. 4'?

No

Replace the indoor electronic control P.C. board and the indoor fan motor.

Yes

Replace the indoor electronic control P.C. board.

Indoor electronic control P.C.Board

Varistor(NR11)

Fuse(F11)

CN211

19

Image 19
Contents MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA ContentsGeneralized stepping motor Technical ChangesIndoor Unit MSZ-GA22VA E1 MSZ-GA25VA E1 MSZ-GA35VA E1 Part Names and FunctionsMSZ-GA25VA E1 Accessories Indoor UnitMSZ-GA22VA E1 MSZ-GA25VA E1 MSZ-GA35VA E1 MSZ-GA22VA E1MSZ-GA22VA E1 MSZ-GA25VA E1 MSZ-GA35VA E1 SpecificationSpecifications and rating conditions of main electric parts When outdoor unit is MXZ typeMSZ-GA22VA E1 MSZ-GA35VA E1 MSZ-GA25VA E1 Noise Criteria CurvesRequired space Indoor unit Outlines and DimensionsMSZ-GA22VA E1 MSZ-GA25VA E1 MSZ-GA35VA E1 Indoor Unit Unit mmRefrigerant System Diagram Wiring DiagramUnit mm J1 J2 Service FunctionsHow to modify the remote controller P.C. board Remote controller model KM05BOperation TroubleshootingBefore troubleshooting, check the following Lead wiring Housing pointInformation for Multi System AIR Conditioner OFF Failure mode recall functionIndoor unit failure mode table Start Indoor unit operates. Outdoor unit doesnt operate Instruction of troubleshootingIndicates abnormalities Troubleshooting check tableMXZ type Right lamp flash Trouble criterion of main partsCheck of indoor fan motor Troubleshooting flowCheck of remote controller and receiver P.C. board Indoor electronic control P.C.Board LED How to check mis-wiring and serial signal errorCheck of installation of the horizontal vane Yes Electromagnetic noise enters into TV sets or radiosIndoor electronic control P.C. board Test point diagram and voltagePower monitor receiver P.C. board MSZ-GA22VA E1 MSZ-GA25VA E1Removing the panel Photo Disassembly InstructionsRemoving the electrical box Operating Procedure PhotosMotor band Removing the horizontal vane motor unit PhotoRemoving the indoor fan motor and the line flow Photo FanIndoor Unit Structural Parts Parts ListAccessory and Remote Controller Indoor Unit Structural Parts ControllerIndoor Unit Heat Exchanger Indoor Unit Electrical Parts and Functional PartsBearing Mount Nozzle AssemblyInterlock Switchfan Switch HolderMSZ-GA35VA AIR Cleaning Filter ANTI-ALLERGY Enzyme FilterOptional Parts MSZ-GA25VAPage Specifications subject to change without notice
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MSZ-GA25VA, MSZ-GA35VA, MSZ-GA22VA specifications

The Mitsubishi Electronics MSZ-GA series encompasses a range of wall-mounted split systems, including the MSZ-GA22VA, MSZ-GA25VA, and MSZ-GA35VA models, designed to provide efficient heating and cooling solutions for a variety of environments. Renowned for their advanced technology and user-friendly features, these air conditioning units are a perfect match for residential and light commercial spaces.

One of the standout features of the MSZ-GA series is the innovative INVERTER technology. This system intelligently adjusts the compressor speed, ensuring that the units operate at optimal efficiency. By maintaining a consistent temperature without constant on/off cycling, this technology significantly reduces energy consumption, leading to lower electricity bills and a reduced carbon footprint.

Another major aspect of these models is their powerful yet quiet operation. The units are designed with advanced noise-reduction technology, allowing them to function at low sound levels, making them ideal for bedrooms and living rooms where disturbances should be kept to a minimum. With noise levels as low as 19 dB(A), users can enjoy a peaceful indoor environment even while the system is running.

Additionally, the MSZ-GA22VA, MSZ-GA25VA, and MSZ-GA35VA models feature an elegant and compact design, which easily integrates into any interior decor. Their sleek and minimalist aesthetics do not compromise on performance, making them a favorite among homeowners and designers alike.

The series also comes with a user-friendly remote control, enabling easy temperature adjustments and settings from across the room. For added convenience, these models include a programmable timer feature, allowing users to set the system to operate according to their schedules. This flexibility not only enhances comfort but also optimizes energy usage.

Moreover, the MSZ-GA series incorporates a powerful air filtration system that helps improve indoor air quality. Featuring a washable anti-allergy enzyme filter, these units capture dust and allergens, making the air cleaner and healthier for occupants.

With a focus on energy efficiency, quiet operation, and advanced air purification, the Mitsubishi Electronics MSZ-GA22VA, MSZ-GA25VA, and MSZ-GA35VA represent an excellent choice for anyone seeking reliable and effective climate control solutions. Whether heating or cooling, these models ensure maximum comfort while minimizing energy usage and environmental impact.