Mitsubishi Electric MUZ-DM25VA-E1 Manual de usuario

Models

MUZ-DM25VA -E1 , ER1 , ET1

MUZ-DM35VA -E1 , ER1 , ET1

OUTDOOR UNIT

SERVICE MANUAL No. OBH751

CONTENTS

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

2. PART NAMES AND FUNCTIONS··················3

3. SPECIFICATION ········································4

4. NOISE CRITERIA CURVES··························6

5. OUTLINES AND DIMENSIONS·····················7

6. WIRING DIAGRAM·····································8

7. REFRIGERANT SYSTEM DIAGRAM·············9

8. PERFORMANCE CURVES ························10

9. ACTUATOR CONTROL·····························20

10. SERVICE FUNCTIONS······························21

11. TROUBLESHOOTING·······························22

12. DISASSEMBLY INSTRUCTIONS·················40

HFC

utilized

R410A

Indoor unit service manual

MSZ-DM•VA Series (OBH750)

NOTE:

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

PARTS CATALOG (OBB751)

MUZ-DM25VA - E1 , ER1 , ET1

MUZ-DM35VA - E1 , ER1 , ET1

1. New model

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.

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.

TECHNICAL CHANGES

OBH751

2PART NAMES AND FUNCTIONS

ACCESSORIES

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(Back and side)

MUZ-DM25VA MUZ-DM35VA

Drain socket 1

OBH751

3SPECIFICATION

Outdoor model MUZ-DM25VA MUZ-DM35VA

Power supply Single phase, 230 V, 50 Hz

Capacity

Rated frequency (Min.-Max.)

Cooling kW 2.5 (1.3 - 3.0) 3.15 (1.4 - 3.5)

Heating 3.15 (0.9 - 3.5) 3.6 (1.1 - 4.1)

Breaker Capacity A 10

Electrical data

Power input 1 (Set) Cooling W710 1,020

Heating 850 975

Running current 1 (Set) Cooling A3.6 4.8

Heating 4.1 4.7

Power factor 1 (Set) Cooling %85 92

Heating 90

Starting current 1 (Set) A 4.1 4.8

Coefﬁcient of performance

(COP) 1 (Set)

Cooling 3.52 3.09

Heating 3.71 3.69

Compressor

Model KNB065FUBMC KNB073FUXMC

Output W 500 550

Current 1Cooling A3.3 4.4

Heating 3.8 4.4

Refrigeration oil (Model) L 0.27 (FV50S)

Fan motor Model RC0J20-AA

Current 1 A 0.26

Dimensions W × H × D mm 699 × 538 × 249

Weight kg 24 25

Special remarks

Dehumidiﬁcation Cooling L/h 0.4 0.6

Air ﬂow 1 m3/h 1,890

Sound level 1 Cooling dB(A) 50 51

Heating 50 51

Fan speed rpm 840

Fan speed regulator 1

Refrigerant ﬁlling capacity (R410A) kg 0.70 0.72

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

Refrigerant piping length (one way): 5 m

1 Measured under rated operating frequency.

OBH751

Speciﬁcations and rated conditions of main electric parts

Model

Item MUZ-DM25VA MUZ-DM35VA

Smoothing capacitor (C62) 800 μF 420 V

Diode module (DB61) 15 A 600 V

(DB65) 25 A 600 V

Fuse (F701, F801, F901) T3.15AL250V

Power module (IC700) 10 A 600 V

Expansion valve coil (LEV) 12 VDC

Reactor (L61) 18 mH

Switching power transistor (Q821) 30 A 600 V

Circuit protection (PTC65) 33 Ω

Terminal block (TB) 3 P

Relay (X63) 3 A 250 V

(X64) 20 A 250 V

R.V. coil (21S4) 220 - 240 VAC

OBH751

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

HEATING

NC-10

MUZ-DM25VA

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

HEATING

Test conditions

Cooling : Dry-bulb temperature 35°C

Heating : Dry-bulb temperature 7°C Wet-bulb temperature 6°C

OUTDOOR UNIT

MICROPHONE

NC-10

MUZ-DM35VA

4NOISE CRITERIA CURVES

OBH751

Unit : mm

MUZ-DM25VA MUZ-DM35VA

5OUTLINES AND DIMENSIONS

REQUIRED SPACE

100 mm or more

350 mm or more

100 mm or more

*1 100 mm or more when front

and sides of the unit are clear

*2 When any 2 sides of left, right

and rear of the unit are clear

Clear *1

200 mm or

more *2

41.5

270.3

157.7

43°

40°

102.7

13.5

538

Air in

Air out

349.5

55.7

121.4

249

17.9

699

500121 259

Bolt pitch for

installation

294~267

285

19.6

Liquid refrigerant pipe joint

Refrigerant pipe (flared) ø6.35

Gas refrigerant pipe joint

Refrigerant pipe (flared) ø9.52

Drain hole ø33

2 - 10.3 X 19.3 Oval hole

OBH751

MUZ-DM25VA

MUZ-DM35VA

6WIRING DIAGRAM

OBH751

Unit : mm

MUZ-DM25VA MUZ-DM35VA

Outdoor

heat

exchanger

Flared connection

Defrost

thermistor

RT61

Discharge

temperature

thermistor

RT62

Flared connection

Stop valve

(with strainer)

Stop valve

(with service port)

Refrigerant flow in cooling

Compressor

Muffler

4-way valve

Refrigerant flow in heating

Refrigerant pipe ø9.52

(with heat insulator)

Refrigerant pipe ø6.35

(with heat insulator)

R.V. coil

heating OFF

cooling ON

Strainer

#100

Capillary tube

3.0 ×

1.4 × 260

LEV

Muffler

7REFRIGERANT SYSTEM DIAGRAM

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Model Refrigerant piping: m Piping size O.D: mm

Max. Length

Max. Height difference

BGas Liquid

MUZ-DM25VA

MUZ-DM35VA 20 12 9.52 6.35

Max. Length

Max. Height

difference

Indoor

unit

Outdoor unit

ADDITIONAL REFRIGERANT CHARGE (R410A : g)

Model Outdoor unit

precharged

Refrigerant piping length (one way)

5 m 6 m 7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 20 m

MUZ-DM25VA 700 0 0 0 20 40 60 80 100 120 140 160 260

MUZ-DM35VA 720

Calculation: X g = 20 g/m (Refrigerant piping length (m) - 7)

NOTE : Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.

OBH751

The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-

tions vary according to the areas where these units are installed, the following information has been provided to clarify the

operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

198 ~ 264 V, 50 Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °C WB

(2) Indoor outlet air wet-bulb temperature : °C WB

(3) Outdoor intake air dry-bulb temperature : °C DB

(4) Total input: W

(5) Indoor intake air dry-bulb temperature : °C DB

(6) Outdoor intake air wet-bulb temperature : °C WB

(7) Total input : W

Indoor air wet and dry bulb temperature difference on the left side of the following chart shows the difference between the

indoor intake air wet and dry bulb temperature and the indoor outlet air wet and dry bulb temperature for your reference at

service.

}

Cooling

Heating

MUZ-DM25VA MUZ-DM35VA

How to measure the indoor air wet and dry bulb temperature difference

1. Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets

of wet and dry bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air

speed is high.

2. Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air intake.

Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

PERFORMANCE CURVES8

INDOOR UNIT OUTDOOR UNIT

Wet and dry bulb

thermometers

FRONT VIEW

Wet and dry bulb

thermometers

BACK VIEW

OBH751

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