Mitsubishi Electric MS-GD80VB-E1 Bedienungsanleitung

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···················· 23

SPLIT-TYPE AIR CONDITIONERS

MS-GD80VB - E1

SERVICE MANUAL

Wireless type

Model

INDOOR UNIT

NOTE:

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

Outdoor unit service manual

MU-GD•VB Series (OBH512)

No. OBH511

REVISED EDITION-A

PARTS CATALOG (OBB511)

Revision A:

• Another type of the electronic control P.C.

board (TYPE 2) has been added to the

original one (TYPE 1). They are both com-

patible with MS-GD80VB- E1 .

Please void OBH511.

TECHNICAL CHANGES

PART NAMES AND FUNCTIONS

Front panel

(When the grille is opened)

Remote controller

Operation section Display section

Emergency operation switch

Operation indicator lamp

Air inlet

To breaker

Power supply cord

Remote control

receiving section

Air cleaning filter (option)

(White bellows type)

Horizontal vane

Vertical vanes

Catechin air filter

Remote control

receiving section

Catechin air filter

Panel

MS-GD80VB

ACCESSORIES

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)

MS-GD80VB

MS-GD80VB - E1

1. New model

Use the speciﬁed refrigerant only

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.

Correct refrigerant is specified in the manuals and on the spec labels provided with our products.

We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by

failure to follow the instructions.

Revision A:

• Another type of the electronic control P.C. board (TYPE 2) has been added to the original one (TYPE 1). They are both com-

patible with MS-GD80VB- E1 .

OBH511A

SPECIFICATION

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

Indoor model

Function

Power supply

Air flow

(High/Med./Low)

Running current

Breaker capacity

Power input

Power factor

Fan motor current

Model

Dimensions W × H × D

Weight

Air direction

Sound level

(High/Med./Low)

Fan speed

(High/Med./Low)

Fan speed regulator

Remote controller model

Fan Electrical

datamotor

Special

remarks

Cooling

Single phase

230 V, 50 Hz

954/822/684

0.34

RC4V40-AA

1,100 × 325 × 258

47/42/37

1,280/1,130/970

KM04B

rpm

MS-GD80VB

NOISE CRITERIA CURVES

10 63 125 250 500 1000 2000 4000 8000

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

Test conditions,

Cooling : Dry-bulb temperature 27˚C Wet-bulb temperature 19˚C

SPL(dB(A)) LINE

High

FAN SPEED

MS-GD80VB

INDOOR UNIT

WALL

MICROPHONE

0.8m

OBH511A

OUTLINES AND DIMENSIONS

258

162

7.5

315

255.547

2.5

98 173

98 173414.5 414.5

253

791

1068

1100

325

Air out

Air in

Insulation ø28

Drain hose ø16

(Connected part O.D)

Installation plate

Wall hole ø75

Wireless remote controller

Installation plate Indoor unit

{

Liquid line ø 9.52- 0.5 m

Gas line ø 12-0.43 m

Insulation ø

50 O.D

32 I.D

Power supply cord

Lead to right 2.0 m

Lead to left 1.0 m

MS-GD80VB Unit: mm

WIRING DIAGRAM

MS-GD80VB

OBH511A

REFRIGERANT SYSTEM DIAGRAM

MS-GD80VB

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Indoor coil

thermistor

RT13(sub)

Flared connection

Refrigerant pipe ø15.88

(with heat insulator)

Refrigerant pipe ø9.52

(with heat insulator)

Indoor coil

thermistor

RT12(main)

Strainer

#50

Refrigerant flow in cooling

Unit: mm

OBH511A

SERVICE FUNCTIONS

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:

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.

(Refer to 10-6.)

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.)

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.

MS-GD80VB

Table 1

No. 1 unit

No. 2 unit

No. 3 unit

No. 4 unit

1 unit operation

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

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 will only accept 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.

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 but-

ton.

OBH511A

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.)

How to disable “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.)

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.

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.

8-3. AUTO RESTART FUNCTION

OBH511A

MICROPROCESSOR CONTROL

MS-GD80VB

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

WIDE VANE

LONG

I FEEL

COOL

DRY

RESET CLOCK

OPERATION SELECT button

FAN SPEED CONTROL button

OFF-TIMER button

HR. button

MIN. button

(TIME SET button)

ON-TIMER button

RESET button

ECONO COOL button

VANE button

(Horizontal vane button)

CLOCK SET button

LONG button

WIDE VANE button

(Vertical vane button)

FAN

ON/OFF

TOO

COOL

TOO

WARM

Signal transmitting section

Operation display section

OPERATE/STOP

(ON/OFF) button

TEMPERATURE buttons

WIRELESS REMOTE CONTROLLER

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.

Approximate

2 or more

Difference

between target

temperature

and room

temperature

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.

Operation stateIndication

Approximate

2 or less

OPERATION INDICATOR lamp

The OPERATION INDICATOR at the right side of the indoor

unit indicates the operation state.

INDOOR UNIT DISPLAY SECTION

The following indication applies regardless of

shape of the indicator.

Lighted

Not lighted

OBH511A

9-1. COOL ( ) OPERATION

(1) Press OPERATE/STOP (ON/OFF) button.

OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.

(2) Select COOL mode with OPERATION SELECT button.

(3) Press TEMPERATURE buttons.

(TOO WARM or TOO COOL button) to select the desired temperature.

The setting range is 16 ~ 31˚C

Indoor fan continues to operate regardless of thermostat's OFF-ON at set speed.

1. Coil frost prevention

When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.

The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of

indoor heat exchanger rises.

2. Discharge temperature protection

The compressor is controlled by the temperature of discharge temperature thermistor RT62 for excess rise protection

of compressor discharge pressure.

9-2. DRY ( ) OPERATION

(1) Press OPERATE/STOP (ON/OFF) button.

OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone.

(2) Select DRY mode with OPERATION SELECT button.

(3) The set temperature is determined from the initial room temperature.

(4) DRY operation will not function when the room temperature is 13˚C or below.

1. Indoor fan speed control

Indoor fan operates at the set speed by FAN SPEED CONTROL button.

However, in AUTO fan operation, fan speed becomes Low.

2. The operation of the compressor and indoor/outdoor fan

Compressor operates by room temperature control and time control.

Set temperature is controlled to fall 2˚C from initial room temperature.

Indoor fan and outdoor fan operate in the same cycle as the compressor.

3. Coil frost prevention

• The operation is as same as coil frost prevention during COOL mode.

• Indoor fan operates at the set speed and the compressor stops for 5 minutes, because protection (Coil frost preven-

tion) has the priority.

However, when coil frost prevention works while the compressor is not operating, it's speed becomes Low.

9-3. FAN ( ) OPERATION

(1) Press OPERATE/STOP (ON/OFF) button.

OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone.

(2) Select FAN mode with OPERATION SELECT button.

(3) Select the desired fan speed. When AUTO, it becomes Low.

Only indoor fan operates. Outdoor unit dose not operate.

9-4. "I FEEL CONTROL" ( ) OPERATION

(1) Press OPERATE/STOP (ON/OFF) button on the remote controller. OPERATION INDICATOR lamp of the indoor unit

turns ON with a beep tone.

(2) Select "I FEEL CONTROL" mode with OPERATION SELECT button.

(3) The operation mode is determined by the room temperature at start-up of the operation.

• Once the mode is fixed, the mode dose not change by room temperature afterwards.

• Under the ON-TIMER ( ) operation, mode is determined as follows.

When the system is stopped on the remote controller, and restarted within 2 hours in " I FEEL CONTROL" ( ) mode,

the system operates in previous mode automatically regardless of the room temperature.

Mode

COOL mode of

"I FEEL CONTROL"

DRY mode of

"I FEEL CONTROL"

Initial room temperature

°C

or more

more than 13

°C

less than 25

°C

OBH511A

(4) The initial set temperature is decided by the initial room temperature.

Model Initial room temperature Initial set temperature

COOL mode of

" I FEEL CONTROL"

26˚C or more 24˚C1

25˚C to 26˚C Initial room temperature minus 2˚C

DRY mode of

" I FEEL CONTROL" more than 13˚C, less than 25˚C Initial room temperature minus 2˚C

1 When the system is restarted with the remote controller, the system operates with the previous set temperature

regardless of room temperature at restart.

The set temperature is calculated by the previous set temperature.

(5) TEMPERATURE buttons

In " I FEEL CONTROL " ( ) mode, set temperature is decided by the microprocessor based on the room temperature.

In addition, set temperature can be controlled by TOO WARM or TOO COOL buttons when you feel too cool or too

warm.

Each time the TOO WARM or TOO COOL button is pressed, the indoor unit receives the signal and emits a beep tone.

• Fuzzy control

When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, consider-

ing the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user's preference to

heat or cool. So this is called "Fuzzy control", and works only in "I FEEL CONTROL" mode.

In DRY mode of "I FEEL CONTROL", the set temperature doesn't change.

…To raise the set temperature 1~2˚C …To lower the set temperature 1~2˚C

9-5. AUTO VANE OPERATION

1. Horizontal vane

(1) Vane motor drive

These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of

the motor are controlled by pulse signals (approximate 12 V) transmitted from indoor microprocessor.

(2) The horizontal vane angle and mode change as follows by pressing the VANE button.

OBH511A

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