Mitsubishi Electric OBH839 Manual de usuario

INDOOR UNIT

SERVICE MANUAL

Outdoor unit service manual

MUZ-AP∙VG Series (OBH839)

MXZ-D∙VA Series (OBH626)

MXZ-E∙VA Series (OBH723)

MXZ-F∙VF Series (OBH790)

No. OBH838A

PARTS CATALOG (OBB838A)

MSZ-AP15VG

MSZ-AP20VG

CONTENTS

1. TECHNICAL CHANGES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 3

2. PART NAMES AND FUNCTIONS∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 4

3. SPECIFICATION∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 5

4. NOISE CRITERIA CURVES∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 6

5. OUTLINES AND DIMENSIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 7

6. WIRING DIAGRAM∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 8

7. REFRIGERANT SYSTEM DIAGRAM∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 9

8. SERVICE FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 10

9. MICROPROCESSOR CONTROL ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙11

10. TROUBLESHOOTING∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 18

11. DISASSEMBLY INSTRUCTIONS∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 30

Models

MSZ-AP15VG -E1 , ET1 , ER1

MSZ-AP20VG -E1 , ET1 , ER1

OBB838 is void.

Revision A:

• MSZ-AP15/20VG- ER1 have been added.

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.

Prepare the proper tools.

Prepare the proper protectors.

Provide adequate ventilation.

After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.

Discharge the capacitor before the work involving the electric parts.

Do not perform the work involving the electric parts with wet hands.

Do not pour water into the electric parts.

Do not touch the refrigerant.

Do not touch the hot or cold areas in the refrigeration cycle.

When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to

touch the live parts.

Revision A:

• MSZ-AP15/20VG- ER1 have been added.

OBH838A

TECHNICAL CHANGES

MSZ-AP15VG - E1 , ET1 , ER1

MSZ-AP20VG - E1 , ET1 , ER1

1. New model

These models are compatible with the outdoor units with low standby power control.

Connecting these models to the MUZ-AP∙VG series outdoor units enables the low standby power control.

These models may be connected to the MUZ-AP∙VG series after once connected to the MXZ series and operated, for exam-

ple because of relocation. In that case, the MUZ-AP∙VG series outdoor units will not operate without taking a step. Follow the

procedure "Deleting the memorized abnormal condition" described in 10-2.1.

OBH838A

ACCESSORIES

Installation plate 1

Installation plate xing screw 4 × 25 mm 5

Wireless remote controller 1

Felt tape (Used for left or left-rear piping) 1

Battery (AAA) for remote controller 2

MSZ-AP15VG MSZ-AP20VG

PART NAMES AND FUNCTIONS

Remote controller

Operation

indicator lamp

Remote control

receiving section

Horizontal vane

Air outlet

Air ﬁlter

Heat exchanger Emergency

operation switch

Front panel

Spec name plate

Air inlet

OBH838A

Indoor model MSZ-AP15VG MSZ-AP20VG

Power supply Single phase 230 V, 50 Hz

Electrical

data

Power

input 1 Cooling W17 19

Heating 17 19

Running

current 1Cooling A0.17 0.19

Heating 0.17 0.19

Fan

motor

Model RC0J30-CW

Current 1Cooling A0.17 0.19

Heating 0.17 0.19

Dimensions W × H × D mm 760 × 250 × 178

Weight kg 8.2

Special remarks

Air direction 5

Airow

Cooling

Super High

m3/h

384 414

High 330 330

Med. 276 276

Low 234 234

Silent 210

Heating

Super High

m3/h

408 438

High 360

Med. 300

Low 264

Silent 222

Sound level

Cooling

Super High

dB(A)

40 42

High 35

Med. 30

Low 26

Silent 21

Heating

Super High

dB(A)

40 42

High 35

Med. 30

Low 26

Silent 21

Fan speed

Cooling

Super High

rpm

1,430 1,530

High 1,250 1,250

Med. 1,080 1,080

Low 940 940

Silent 860

Heating

Super High

rpm

1,430 1,530

High 1,290

Med. 1,110

Low 990

Silent 870

Fan speed regulator 5

Remote controller model SG19C

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

Heating: Indoor Dry-bulb temperature 20°C

Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C

1 Measured under rated operating frequency.

Specifications and rating conditions of main electric parts

Fuse (F11) T3.15AL250V

Horizontal vane motor (MV) 12 V DC

Varistor (NR11) 470 V

Terminal block (TB) 3P

SPECIFICATION

OBH838A

MSZ-AP15VG

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

NC-10

MSZ-AP20VG

Test conditions

Cooling: Dry-bulb temperature 27°C

Wet-bulb temperature 19°C

Heating: Dry-bulb temperature 20°C

INDOOR UNIT WALL

MICROPHONE

0.8m

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

NC-10

NOISE CRITERIA CURVES

OBH838A

Unit: mm

MSZ-AP15VG MSZ-AP20VG

OUTLINES AND DIMENSIONS

Piping

Insulation ø35 O.D

Liquid line ø6.35 - 0.39m (Flared connection ø6.35)

Gas line ø9.52 - 0.34m (Flared connection ø9.52)

Drain hose Insulation ø29 Connected part ø16 O.D

193

60 19

155295

167.5

187.5

209

21.5

299.5

145145

335

(45)

166.5

208

61 78

740

760

178 5

250

335.5

14.551

100

166

80.5

(66) 505 189

INDOOR UNIT

INSTALLATION PLATE

11×26 OBLONG HOLE 11×20 OBLONG HOLE

WALL HOLE

IN CASE OF LEFT,

LEFT BACK,OR

LEFT UNDER PIPING

(USING SPACER),

MIN 120.5mm

MIN 44.5mm

MIN 14mm

MIN 30mm

MIN 20mm

AIR IN

PIPING DRAIN HOSE

INSTALLATION PLATE

AIR OUT

OBH838A

MSZ-AP15VG - E1 , ER1 MSZ-AP20VG - E1 , ER1

MSZ-AP15VG - ET1 MSZ-AP20VG - ET1

WIRING DIAGRAM

ALICI KARTI

SİVİÇ KARTI GÖSTERGE KARTI

RÖLE

İÇ ÜNİTE ELEKTRONİK

KONTROL KARTI

Sembolleri gösterir

Sadece bakır besleme

kablosu kullanın

NOTLAR

Dış ünite elektronik kablolaması için dış ünite

elektronik kablo devre şemasını referans alınız.

SİGORTA

(T3.15AL250V)

FAN MOTORU

VARİSTÖR

ODA SICAKLIK

TERMİSTÖRÜ

BORU SICAKLIK

TERMİSTÖRÜ(ANA)

BORU SICAKLIK

TERMİSTÖRÜ(YARDIMCI)

DIŞ ÜNİTEYE

Terminal bloğu

Konektör

PARÇA ADI

TERMİNAL BLOĞU

SEMBOL SEMBOL

KANAT MOTORU

(YATAY ÜST)

KANAT MOTORU

(YATAY ALT)

RESİSTÖR

PARÇA ADI

OBH838A

Indoor

heat

exchanger Flared connection

Room temperature

thermistor

RT11

Flared connection

Refrigerant pipe ø9.52

(with heat insulator)

Refrigerant pipe ø6.35

(with heat insulator)

Indoor coil

thermistor

RT12 (main)

Indoor coil

thermistor

RT13 (sub)

Refrigerant flow in cooling

Refrigerant flow in heating

Unit: mm

MSZ-AP15VG MSZ-AP20VG

REFRIGERANT SYSTEM DIAGRAM

OBH838A

8-1. TIMER SHORT MODE

For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C.

board. (Refer to 10-7.)

• The set time for the ON/OFF timer can be reduced to 1 second for each minute.

• After the breaker is turned on, the time for starting the compressor, which normally takes 3 minutes, can be reduced to 3

seconds. Restarting the compressor, which takes 3 minutes, cannot be reduced.

8-2. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT

A maximum of 4 indoor units with wireless remote controllers can be used in a room.

To operate the indoor units individually with each remote controller, assign a number to each remote controller according

to the number of the indoor unit.

This setting can be set only when all the following conditions are met:

• The remote controller is powered OFF.

• Weekly timer is not set.

• Weekly timer is not being edited.

(1) Hold down button on the remote controller for 2 seconds to enter the pairing mode.

(2) Press button again and assign a number to each remote controller.

Each press of button advances the number in the following order: 1 → 2 → 3 → 4.

(3) Press button to complete the pairing setting.

MSZ-AP15VG MSZ-AP20VG

SERVICE FUNCTIONS

8-3. AUTO RESTART FUNCTION

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

are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in

the same mode just before the shutoff of the main power.

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.

Cut the jumper wire to JR77 on the indoor electronic control P.C. board. (Refer to 10-7.)

NOTE:

• The operation settings are memorized when 10 seconds has passed after the indoor unit 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 can-

celled.

• 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 appliance 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 start-

ing 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 current

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

CN112

R111

Indoor electronic

control P.C. board

JR77

IC112

CN151

CN111

CN211

OBH838A

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