Mitsubishi MS-GD80VB-E1 Service Manual

SPLIT-TYPE, AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Wireless type Model

No. OBH511

MS-GD80VB -

Outdoor unit service manual

MU-GD•VB Series (OBH512)

CONTENTS

1. TECHNICAL CHANGES ··································· 2

2. PART NAMES AND FUNCTIONS ····················· 2

3. SPECIFICATION ················································ 3

4. NOISE CRITERIA CURVES ······························ 3

5. OUTLINES AND DIMENSIONS ························ 4

6. WIRING DIAGRAM ············································ 4

7. REFRIGERANT SYSTEM DIAGRAM ··············· 5

8. SERVICE FUNCTIONS ····································· 6

9. MICROPROCESSOR CONTROL ····················· 8

10. TROUBLESHOOTING ····································· 14

11. DISASSEMBLY INSTRUCTIONS ···················· 22

PARTS CATALOG (OBB511)

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

TECHNICAL CHANGES

MS-GD80VB -

1. New model

PART NAMES AND FUNCTIONS

MS-GD80VB

Air cleaning filter (option) (White bellows type)

Panel

Catechin air filter

Vertical vanes

Front panel

Air inlet

To breaker

Power supply cord

Remote control

receiving section

Operation section

(When the grille is opened)

ACCESSORIES

Horizontal vane

Emergency operation switch

Installation plate

Installation plate fixing screw 4 × 25 mm

Remote controller holder

Fixing screw for × 3.5 × 1.6 mm (Black)

Battery (AAA) for remote controller

Wireless remote controller

Felt tape (Used for left or left-rear piping)

Remote controller

Display section

Operation indicator lamp

Remote control

receiving section

MS-GD80VB

SPECIFICATION

Indoor model

Function

Power supply

Breaker capacity Running current

datamotor

Power input Power factor

Model Fan motor current

Fan Electrical

Dimensions W × H × D

Weight

Air direction

Air flow

(High/Med./Low)

Special

remarks

Sound level Fan speed

(High/Med./Low)

Fan speed regulator

Remote controller model

A W %

rpm

MS-GD80VB

Cooling Single phase 230 V, 50 Hz

0.34 69 88

RC4V40-AA

0.34

1,100 × 325 × 258

954/822/684

47/42/37

1,280/1,130/970

KM04B

NOTE: Test conditions are based on ISO 5151. Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C Indoor-Outdoor piping length: 5 m

NOISE CRITERIA CURVES

MS-GD80VB

FAN SPEED

High

Test conditions, Cooling : Dry-bulb temperature 27˚C Wet-bulb temperature 19˚C

SPL(dB(A)) LINE

NC-70

NC-60

NC-50

NC-40

INDOOR UNIT

WALL

0.8m

MICROPHONE

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-30

NC-20

OUTLINES AND DIMENSIONS

MS-GD80VB

325

162

110 0

791

1068

253

Power supply cord Lead to right 2.0 m

Lead to left 1.0 m

Installation plate

98 173414.5 414.5

Wall hole ø75

258

Air in

Air out

Installation plate

Indoor unit

173

Liquid line ø 9.52- 0.5 m Gas line ø 12-0.43 m

{

Insulation øø50 O.D

Drain hose (Connected part O.D)

Insulation ø28

ø16

Unit: mm

255.547

2.5

32 I.D

7.5

315

Wireless remote controller

WIRING DIAGRAM

MS-GD80VB

REFRIGERANT SYSTEM DIAGRAM

MS-GD80VB

Indoor heat exchanger

Room temperature thermistor RT11

Indoor coil thermistor RT12(main)

Indoor coil thermistor RT13(sub)

Strainer

#50

Refrigerant pipe ø15.88 (with heat insulator)

Flared connection

Refrigerant pipe ø9.52 (with heat insulator)

Unit: mm

Refrigerant flow in cooling

SERVICE FUNCTIONS

MS-GD80VB

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows. Set time: 1 minute 1-second Set time: 3 minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS.)

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification. The board has a print as shown below:

NOTE: For modification, take out the bat-

teries and press the OPERATE/ STOP (ON/OFF) button 2 or 3 times at first.

After modification, put back the bat-

teries then press the RESET button.

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1. After modification, press the RESET button.

Table 1

1 unit operation

No. 1 unit

No. 2 unit

No. 3 unit

No. 4 unit

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit. The indoor unit only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker has turned OFF, or the power supply has shut down. Please conduct the above setting once again after the power has restored.

No modification

–

2 units operation

Same as at left

Solder J1

–

3 units operation

Same as at left

Solder J2

–

4 units operation

Same as at left

Solder both J1 and J2

8-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are

memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power. However if the unit is operated in “I FEEL CONTROL” mode before power failure, the operation is not memorized. In “I FEEL CONTROL” mode, the operation is decided by the initial room temperature.

Operation

If the main power has been cut, the operation settings remain. After the power is restored, the unit restarts automatically

according to the memory. (However, it takes at least 3 minutes for the compressor to start running.)

CN201

C11

CN211

How to release “AUTO RESTART FUNCTION”

Turn OFF the main power for the unit. Solder jumper wire to JR07 on the indoor electronic control P.C.

board. (Refer to 10-6.)

TAB12

CN112

CN111

CN121

RA102

IC101

IC152

CN151

SW1

JR07

NOTE: •The operation settings are memorized when 10 seconds have passed after the remote controller was operated with

the remote controller.

•If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is

cancelled.

•If the unit has been OFF with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is OFF.

•To prevent breaker OFF due to the rush of starting current, systematize other home appliances not to turn ON at the

same time.

•When some air conditioners are connected to the same supply system, if they are operated before power failure, the

starting current of all the compressors may flow simultaneously at restart.

Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting cur-

rent by adding to the system that allows the units to start one by one.

MICROPROCESSOR CONTROL

MS-GD80VB

WIRELESS REMOTE CONTROLLER

Signal transmitting section

Operation display section

OPERATE/STOP (ON/OFF) button

VANE button

(Horizontal vane button)

OPERATION SELECT button

ECONO COOL button

WIDE VANE button

(Vertical vane button)

RESET button

ON/OFF

WARM

ON/OFF

WARM

FAN

I FEEL

COOL

VAN E

DRY

FAN

MODE

WIDE VANE

ECONO COOL

LONG

RESET CLOCK

TOO

COOL

TOO

COOL

STOP

START

HR.

MIN.

TEMPERATURE buttons

FAN SPEED CONTROL button

OFF-TIMER button

ON-TIMER button

HR. button

MIN. button

(TIME SET button)

CLOCK SET button

LONG button

NOTE: • The last setting will be stored after the unit is turned OFF with the remote controller.

• Indoor unit receives the signal of the remote controller with beeps.

INDOOR UNIT DISPLAY SECTION

OPERATION INDICATOR lamp

The OPERATION INDICATOR at the right side of the indoor unit indicates the operation state.

The following indication applies regardless of shape of the indicator.

Lighted

Not lighted

Indication

Operation state

This shows that the air conditioner is operating to reach the target temperature. Please wait until the target temperature is obtained.

This shows that the room temperature is approaching the target temperature.

Difference between target temperature and room temperature

Approximate 2 or more

Approximate 2 or less

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