Mitsubishi MUZ-AP42VG - ET1, MUZ-AP25VG - ET1, MUZ-AP50VG - E1, MUZ-AP50VG - ET1, MUZ-AP25VGH - E1 Service Manual

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No. OBH789

Indoor unit service manual MSZ-AP•VG(K) Series (OBH788)

PARTS CATALOG (OBB789)

HFC

utilized

R32

SERVICE MANUAL

OUTDOOR UNIT

NOTE:

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

CONTENTS

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

2. SERVICING PRECAUTIONS FOR UNITS USING REFRIGERANT R32 ····························· 3

3. PART NAMES AND FUNCTIONS ····················· 5

4. SPECIFICATION ················································ 6

5. NOISE CRITERIA CURVES ······························ 7

6. OUTLINES AND DIMENSIONS ························ 9

7. WIRING DIAGRAM ·········································· 10

8. REFRIGERANT SYSTEM DIAGRAM ············· 13

9. PERFORMANCE CURVES ····························· 15

10. ACTUA TOR CONTROL ··································· 29

11. SERVICE FUNCTIONS ···································· 30

12. TROUBLESHOOTING ····································· 31

13. DISASSEMBLY INSTRUCTIONS ···················· 51

Models MUZ-AP25VG

E1,

ET1

MUZ-AP25VGH

MUZ-AP35VG

E1,

ET1

MUZ-AP35VGH

MUZ-AP42VG

E1,

ET1

MUZ-AP42VGH

MUZ-AP50VG

E1,

ET1

MUZ-AP50VGH

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG

MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH

MUZ-AP25VG

E1, ET1

MUZ-AP35VG

E1, ET1

MUZ-AP42VG

E1, ET1

MUZ-AP50VG

E1, ET1

MUZ-AP25VGH

MUZ-AP35VGH

MUZ-AP42VGH

MUZ-AP50VGH

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 speciﬁ ed 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

OBH789

SERVICING PRECAUTIONS FOR UNITS USING REFRIGERANT R32

Servicing precautions for units using refrigerant R32

WARNING

This unit uses a flammable refrigerant. If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire.

Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating

electric heater.)

Do not pierce or burn. Be aware that refrigerants may not contain an odor. Pipe-work shall be protected from physical damage. The installation of pipe-work shall be kept to a minimum. Compliance with national gas regulations shall be observed. Keep any required ventilation openings clear of obstruction. Servicing shall be performed only as recommended by the manufacturer. The appliance shall be stored so as to prevent mechanical damage from occurring.

Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points.

1. Information on servicing Checks on the Area

Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.

Work Procedure

Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapor being present while the work is being performed.

General Work Area

All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the conditions within the area have been made safe by control of flammable material.

Checking for Presence of Refrigerant

The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.

Presence of Fire Extinguisher

If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.

No Ignition Sources

No person carrying out work in relation to a refrigeration system which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installa tion, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. "No Smoking" signs shall be displayed.

Ventilated Area

Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.

Checks on the Refrigeration Equipment

Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer's maintenance and service guidelines shall be followed. If in doubt, consult the manufacturer's technical department for assistance. The following checks shall be applied to installations using flammable refrigerants:

• The charge size is in accordance with the room size within which the refrigerant containing parts are installed.

• The ventilation machinery and outlets are operating adequately and are not obstructed.

• If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant.

• Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.

• Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing

components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being cor roded.

Checks on Electrical Devices

Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compro mise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is nec essary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised. Initial safety checks shall include that:

• capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;

• no live electrical components and wiring are exposed while charging, recovering or purging the system;

• there is continuity of earth bonding

2. Repairs to Sealed Components During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers,

etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.

Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of

protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc. Ensure that the apparatus is mounted securely. Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer's specifications.

3. Repair to intrinsically Safe Components

Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

4. Cabling

Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

OBH789

5. Detection of Flammable Refrigerants Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.

6. Leak Detection Methods Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable refrigerants, the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the appropriate percentage of gas (25 % maximum) is confirmed. Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. If a leak is suspected, all naked flames shall be removed/extinguished. If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak. For appliances containing flammable refrigerants, oxygen free nitrogen (OFN) shall then be purged through the sys tem both before and during the brazing process.

7. Removal and Evacuation When breaking into the refrigerant circuit to make repairs - or for any other purpose conventional procedures shall be used. However, for flammable refrigerants it is important that best practice is followed since flammability is a consideration. The following procedure shall be adhered to: ▪ remove refrigerant ▪ purge the circuit with inert gas ▪ evacuate ▪ purge again with inert gas ▪ open the circuit by cutting or brazing. The refrigerant charge shall be recovered into the correct recovery cylinders. For appliances containing flammable refrigerants, the system shall be "flushed" with OFN to render the unit safe. This process may need to be repeated several times. Compressed air or oxygen shall not be used for purging refrigerant sys tems. For appliances containing flammable refrigerants, flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum. This process shall be repeated until no refrigerant is within the system. When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place. This operation is abso- lutely vital if brazing operations on the pipe-work are to take place. Ensure that the outlet for the vacuum pump is not close to any ignition sources and that ventilation is available.

8. Charging Procedures In addition to conventional charging procedures, the following requirements shall be followed: ▪ Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them. ▪ Cylinders shall be kept upright. ▪ Ensure that the refrigeration system is earthed prior to charging the system with refrigerant. ▪ Label the system when charging is complete (if not already). ▪ Extreme care shall be taken not to overfill the refrigeration system. Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas. The system shall be leak-tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.

9. Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced. a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure, ensure that:

- mechanical handling equipment is available, if required, for handling refrigerant cylinders;

- all personal protective equipment is available and being used correctly;

- the recovery process is supervised at all times by a competent person;

- recovery equipment and cylinders conform to the appropriate standards. d) Pump down refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. f) Make sure that cylinder is situated on the scales before recovery takes place. g) Start the recovery machine and operate in accordance with manufacturer's instructions. h) Do not overfill cylinders. (no more than 80 % volume liquid charge). i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off. k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

10. Labeling Equipment shall be labeled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. For appliances containing flammable refrigerants, ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.

11. Recovery When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cyl inders for holding the total system charge are available. All cylinders to be used are designated for the recovered refrigerant and labeled for that refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs. The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recov ery of all appropriate refrigerants including, when applicable, flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refriger ant release. Consult manufacturer if in doubt. The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.

If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certa

in that flammable refriger ant does not remain within the lubricant. The evacuation process shall be carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.

OBH789

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH

PART NAMES AND FUNCTIONS

ACCESSORIES

MODELS

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP50VG

Drain socket 1

MUZ-AP50VG MUZ-AP50VGH

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

OBH789

1 Measured under rated operating frequency.

Outdoor model

MUZ-AP25VG

MUZ-AP25VGH

MUZ-AP35VG

MUZ-AP35VGH

MUZ-AP42VG

MUZ-AP42VGH

MUZ-AP50VG

MUZ-AP50VGH

Power supply Single phase, 230 V, 50 Hz

Capacity Rated frequency (Min.-Max.)

Cooling

2.5 (0.9 - 3.4) 3.5 (1.1 - 3.8) 4.2 (0.9 - 4.5) 5.0 (1.4 - 5.4)

Heating 3.2 (1.0 - 4.1) 4.0 (1.3 - 4.6) 5.4 (1.3 - 6.0) 5.8 (1.4 - 7.3)

Breaker Capacity A 10 16

Electrical data

Power input 1 (Set)

Cooling

600 990 1,300 1,550

Heating 780 1,030 1,490 1,600

Running current

(Set)

Cooling

2.9 4.5 5.8 6.9

Heating 3.6 4.7 6.6 7.0

Power factor

1 (Set)

Cooling

89 95 97 97

Heating 94 95 98 99

Starting current

1 (Set) A 3.6 4.7 6.6 7.0

Coefﬁ cient of performance (COP) 1 (Set)

Cooling 4.17 3.54 3.23 3.23 Heating 4.10 3.88 3.62 3.63

Compressor

Model KVB073FYXMC KVB073FYXMC SVB130FBBMC SVB130FBBMT Output W 470 470 900 900

Current

Cooling

2.50 4.10 5.42 6.39

Heating 3.14 4.20 6.05 6.41

Refrigeration oil (Model) L 0.27 (FW68S) 0.35 (FW68S)

Fan motor

Model RC0J50-NC RC0J50-RA Current

Cooling

0.22 0.22 0.20 0.27

Heating 0.20 0.24 0.23 0.27 Dimensions W × H × D mm 800 × 550 × 285 800 × 714 × 285 Weight kg 31 31 35 40

Special remarks

Dehumidiﬁ cation Cooling L/h 0.3 0.6 1.4 1.9

Air ﬂ ow

Cooling

High

m3/h

2,178 2,178 2,058 2,430

Low 1,038 1,038 906 1,320

Heating

High 2,076 2,076 1,962 2,430 Med. 1,788 1,788 1,686 2,238

Low 1,452 1,452 1,260 1,704

Sound level

Cooling

dB(A)

47 49 50 52

Heating 48 50 51 52

Fan speed

Cooling

High

rpm

940 940 940 840

Low 470 470 460 490

Heating

High 900 900 900 840 Med. 780 780 780 780

Low 640 640 600 610 Fan speed regulator 3 Refrigerant ﬁ lling capacity (R32) kg 0.55 0.55 0.70 1.00

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 Heating: Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15°C Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C Refrigerant piping length (one way): 5 m

SPECIFICATION

OBH789

Speciﬁ cations and rated conditions of main electric parts

Model

Item

MUZ-

AP25VG

MUZ-

AP25VGH

MUZ-

AP35VG

MUZ-

AP35VGH

MUZ-

AP42VG

MUZ-

AP42VGH

MUZ-

AP50VG

MUZ-

AP50VGH

Smoothing capacitor

(C61) — 600 μF/ 620 μF 420 V

(C62, C63) 600 μF/ 620 μF 420 V Diode module (DB61) 15 A 600 V 25 A 600 V Diode module (DB65) 25 A 600 V

Fuse

(F61) 25A 250V (F62) 15A 250V

(F701, F801, F901)

T3.15AL250V

Defrost heater (H) —

230 V

60W

—

230 V

60W

—

230 V

60W

—

230 V 130W

Power module

(IC700) 15 A 600 V 20 A 600 V (IC932) 5 A 600 V

Expansion valve coil

(LEV) 12 V DC

Reactor (L61) 18 mH 23 mH Switch power

transistor

(Q821) 30 A 600 V

Current-limiting PTC thermistor

(PTC64, PTC65)

33 Ω

Terminal block (TB1) 5 P

Relay

(X63) 3 A 250 V (X64) 20 A 250 V (X66) — 3 A 250 V — 3 A 250 V — 3 A 250 V — 3 A 250 V

(X69) 10 A 230 V R.V.coil (21S4) 220 - 240 V AC Heater protector (26H) —

Open 45°C

—

Open 45°C

—

Open 45°C

—

Open 45°C

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

47 48

NC-10

MUZ-AP25VG MUZ-AP25VGH

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

49 50

NC-10

MUZ-AP35VG MUZ-AP35VGH

NOISE CRITERIA CURVES

OBH789

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-AP42VG MUZ-AP42VGH

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-AP50VG MUZ-AP50VGH

Test conditions Cooling: Dry-bulb temperature 35°C Wet-bulb temperature 24°C Heating: Dry-bulb temperature 7°C Wet-bulb temperature 6°C

OUTDOOR UNIT

MICROPHONE

1 m

OBH789

Unit: mm

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH

(MUZ-AP25/35/42VG) (MUZ-AP25/35/42VGH)

MUZ-AP50VG MUZ-AP50VGH

OUTLINES AND DIMENSIONS

(MUZ-AP50VG) (MUZ-AP50VGH)

OBH789

WIRING DIAGRAM

MUZ-AP25VG -E1,

ET1

MUZ-AP35VG -E1,

ET1

MUZ-AP25VGH -

MUZ-AP35VGH -

OBH789

MUZ-AP42VG -E1,

ET1

MUZ-AP42VGH -

OBH789

MUZ-AP50VG -E1,

ET1

MUZ-AP50VGH -

OBH789

Unit: mm

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainar)

Refrigerant flow in cooling

Compressor

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 ON cooling OFF

Strainer #100

LEV

Ambient temperature thermistor RT65

Muffler

Capillary tube ø4.0×ø2.4×240

Outdoor heat exchanger temperature thermistor RT68

Stop valve (with service port)

Muffler

REFRIGERANT SYSTEM DIAGRAM

Unit: mm

MUZ-AP42VG MUZ-AP42VGH

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainar)

Refrigerant flow in cooling

Compressor

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 ON cooling OFF

Strainer #100

LEV

Ambient temperature thermistor RT65

Muffler

Capillary tube ø4.0×ø2.4×240

Outdoor heat exchanger temperature thermistor RT68

Stop valve (with service port)

Muffler

MUZ-AP25VG MUZ-AP35VG MUZ-AP25VGH MUZ-AP35VGH

OBH789

MUZ-AP50VG MUZ-AP50VGH

Unit: mm

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (With strainer)

Stop valve (with service port)

Capillary tube ø

4.0×ø

2.4×240

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe

9.52

(with heat insulator)

Refrigerant pipe ø6.35 (with heat insulator)

LEV

R.V. coil heating ON cooling OFF

Muffler

Outdoor heat exchanger temperature thermistor RT68

Ambient temperature thermistor RT65

Strainer

#100

Muffler

Capillary tube ø3.0×ø2.0×210(×2)

Max. Length A

Max. Height

difference

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Model

Refrigerant piping: m Piping size O.D: mm

Max. Length A Max. Height difference B Gas Liquid

MUZ-AP25/35/42/50VG(H) 20 12 9.52 6.35

ADDITIONAL REFRIGERANT CHARGE (R32: g)

Model

Outdoor unit

precharged

Refrigerant piping length (one way)

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

MUZ-AP25VG(H)

550

0 20 40 60 80 100 120 140 160 260

MUZ-AP35VG(H) MUZ-AP42VG(H) 700 MUZ-AP50VG(H) 1,000

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.

OBH789

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

}

Cooling

(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]

}

Heating(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.

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.

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP50VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH MUZ-AP50VGH

INDOOR UNIT

OUTDOOR UNIT

Wet and dry bulb thermometers FRONT VIEW

Wet and dry bulb thermometers BACK VIEW

Cooling capacity (

at Rated frequency)

0.9

1.0

1.1

1.2

1.3

1.4

1.5

-10-5 0 5 1015202530354045 Outdoor intake air Dry-bulb temperature(°C)

Capacity correction factors

20 18

Indoor intake air Wet-bulb temperature( )

10.7

9.9

9.0

8.2

7.4

6.7

5.9

MUZ-AP50VG

MUZ-AP42VG

MUZ-AP35VG

MUZ-AP25VG

Indoor air Wet-bulb temperature

difference (°C)

5.9

5.4

5.0

4.6

4.2

3.8

3.4

8.6

7.9

7.3

6.7

6.0

5.4

4.8

11.7

10.8

9.9

9.0

8.1

7.2

6.4

MUZ-AP25VGH

MUZ-AP50VGH

MUZ-AP42VGH

MUZ-AP35VGH

9-1. CAPACITY AND INPUT CURVES

PERFORMANCE CURVES

OBH789

NOTE: The above broken lines are for the heating operation without any frost and defrost operation.

0.8

0.9

1.0

1.1

1.2

1.3

-10-5 0 5 1015202530354045 Outdoor intake air Dry-bulb temperature (°C)

Input correction factors

22 20 18

Indoor intake air Wet-bulb temperature( )

Indoor air Wet-bulb temperature

difference (°C)

5.0

4.6

4.2

3.8

3.4

3.0

7.3

6.7

6.0

5.4

4.8

4.2

9.0

8.2

7.4

6.7

5.9

5.2

9.9

9.0

8.1

7.2

6.4

5.6

MUZ-AP50VG

MUZ-AP42VG

MUZ-AP35VG

MUZ-AP25VG

MUZ-AP25VGH

MUZ-AP50VGH

MUZ-AP42VGH

MUZ-AP35VGH

Total input (Cooling :

at Rated frequency

)

Indoor air Dry-bulb temperature

difference (°C)

16.2

15.0

13.7

12.5

11.2

10.0

8.7

7.5

6.2

5.0

25.2

23.3

21.3

19.4

17.5

15.5

13.6

11.6

9.7

7.8

27.1

25.0

22.9

20.8

18.8

16.7

14.6

12.5

10.4

8.3

20.3

18.7

17.2

15.6

14.0

12.5

10.9

9.4

7.8

6.2

MUZ-AP50VG

MUZ-AP42VG

MUZ-AP35VG

MUZ-AP25VG

MUZ-AP25VGH

MUZ-AP50VGH

MUZ-AP42VGH

MUZ-AP35VGH

Outdoor intake air Wet-bulb temperature (°C)

-20 -15 -10 -5 0 5 10 15

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Heating capacity (

at Rated frequency)

Capacity correction factor

Indoor intake air Dry-bulb temperature ( )

Indoor air Dry-bulb temperature

difference (°C)

16.2

15.0

13.7

12.5

11.2

10.0

8.7

7.5

6.2

5.0

20.3

18.7

17.2

15.6

14.0

12.5

10.9

9.4

7.8

6.2

25.2

23.3

21.3

19.4

17.5

15.5

13.6

11.6

9.7

7.8

27.1

25.0

22.9

20.8

18.8

16.7

14.6

12.5

10.4

8.3

MUZ-AP50VG

MUZ-AP42VG

MUZ-AP35VG

MUZ-AP25VG

MUZ-AP25VGH

MUZ-AP50VGH

MUZ-AP42VGH

MUZ-AP35VGH

Outdoor intake air Wet-bulb temperature (°C)

-20 -15 -10 -5 0 5 10 15

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Total input (Heating :

at Rated frequency

)

Input correction factor

Indoor intake air Dry-bulb temperature ( )

Lower limit of guaranteed operating range in heating MUZ-AP25/35/42/50VG: -15°C MUZ-AP25/35/42/50VGH: -20°C

OBH789

9-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR

0 50 100

150

0.5

1.0

1.5

0 50 100

150

0.5

1.0

1.5

0 50 100

0.5

1.0

1.5

0 50 100

0.5

1.0

1.5

2.0

0 50 100

150

0.5

1.0

1.5

050100

150

0.5

1.0

1.5

0 50 100

150

0.5

1.0

1.5

0 50 100

150

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

0 50 100

0.5

1.0

1.5

2.0

0 50 100

150

0.5

1.0

1.5

050100

150

0.5

1.0

1.5

2.0

0 50 100

150

0.5

1.0

1.5

050100

150

0.5

1.0

1.5

2.0

MUZ-AP25VG MUZ-AP25VGH

MUZ-AP35VG MUZ-AP35VGH

Correction of Cooling capacity

Capacity correction factors

Correction of Cooling input

Input correction factors

Correction of Heating capacity

Capacity correction factors

MUZ-AP42VG MUZ-AP42VGH

Correction of Heating input

Capacity correction factors

Correction of Cooling capacity

Capacity correction factors

Correction of Cooling input

Input correction factors

Correction of Heating capacity

Capacity correction factors

MUZ-AP50VG MUZ-AP50VGH

Correction of Heating input

Capacity correction factors

The operatio na l freq uency of compressor (Hz)

The op erat i o na l frequency of compressor (Hz)

The operational frequency of compressor (Hz)

Correction of Cooling ca pa ci ty

The operatio na l freq uency of compressor (Hz)

Ca pacity correct io n f a ct o rs

Correction of Cooling input

The operational frequency of compressor (Hz)

In put correction factors

Correction of Heati ng capacity

The operational frequency of compressor (Hz)

Capacity correction factors

Correction of Heati ng input

The operational frequency of compressor (Hz)

Input correction factors

Co rrect io n o f C o o ling capacity

The op erat i o na l frequency of compressor (Hz)

Ca pacity correct io n f a ct o rs

Cor rection of Cooling input

The op erat i o na l frequency of compressor (Hz)

Inp ut correcti o n f a ct o rs

Correction of Heati ng capacity

The operational frequency of compressor (Hz)

Capacity correction factors

Correction of Heati ng input

The operational frequency of compressor (Hz)

Input correction factors

OBH789

15 20 25 30 35

0.5

0.7

0.9

1.1

1.3

1.5

15 20 25 30 35

0.5

0.6

0.7

0.8

0.9

1.0

15 20 25 30 35

0.5

0.7

0.9

1.1

1.3

1.5

15 20 25 30 35

0.5

0.7

0.9

1.1

1.3

1.5

(kgf/cm2 [Gauge])(MPa [Gauge])

50 60 70

Ambient temperature(°C) Ambient humi di ty ( %)

50 60 70

Ambient temperature(°C) Ambient humi di ty( %)

50 60 70

Ambient temperature(°C) Ambient humi dity(%)

50 60 70

Ambient temperature(°C) Ambient humi di ty( %)

Outdoor low pressure

MUZ-AP25VG MUZ-AP35VG

MUZ-AP42VG

MUZ-AP50VG

MUZ-AP25VGH

MUZ-AP35VGH MUZ-AP42VGH

MUZ-AP50VGH

COOL operation

Both indoor and outdoor unit are under the same temperature/

humidity condition.

Operation: TEST RUN OPERATION (Refer to 9-3.)

9-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Dry-bulb temperature (°C) Relative humidity (%)

20 50 25 60 30 70

9-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION

1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL: Press once, HEAT: Press twice).

2. Test run operation starts and continues to operate for 30 minutes.

3. Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode.

4. Indoor fan operates at High speed.

After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (operation frequency of compressor varies).

6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on remote controller.

NOTE: The unit of pressure has been changed to MPa on the international system of units (SI unit system) The conversion factor is: 1 (MPa [Gauge]) = 10.2 (kgf/cm

[Gauge])

OBH789

15 20 25 30 35

1.5

2.0

2.5

3.0

15 20 25 30 35

2.5

3.0

3.5

4.0

4.5

15 20 25 30 35

3.5

4.0

4.5

5.0

5.5

6.0

Ambient temperature(°C) Ambient humidity(%)

Ambient temperature (°C) Ambient humidity(%)

Outdoor current (A)Outdoor current (A)

Ambient temperature (°C) Ambient humidity(%)

Outdoor current (A)

MUZ-AP35VG MUZ-AP35VGH

MUZ-AP25VG MUZ-AP25VGH

Outdoor unit current

MUZ-AP42VG MUZ-AP42VGH

MUZ-AP50VG MUZ-AP50VGH

0510

15 20 25

2.0

2.5

3.0

3.5

4.0

0510

20 25

5.5

6.0

6.5

7.0

0510

15 20 25

2.0

2.5

3.0

3.5

4.0

0510

4.5

5.0

5.5

6.0

6.5

Ambient temperature (°C)

Outdoo r cu rren t ( A)

Ambient temperature (°C)

Outdoo r cu rren t ( A)

Ambient temperature (°C)

Outdoo r cu rren t ( A)

Ambient temperature (°C)

Outdoo r cu rren t ( A)

MUZ-AP35VG MUZ-AP35VGH

MUZ-AP25VG MUZ-AP25VGH

Outdoor unit current

MUZ-AP42VG MUZ-AP42VGH

MUZ-AP50VG MUZ-AP50VGH

Condition:

Operation: Test run operation (Refer to 9-3.)

HEAT operation

Indoor Outdoor

Dry bulb temperature (°C) 20.0 2 7 15 20.0

Wet bulb temperature (°C) 14.5 1 6 12 14.5

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP25VG MUZ-AP25VGH

CAPACITY: 2.5 kW SHF: 0.92 INPUT: 600 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 2.94 2.17 0.74 480 2.81 2.08 0.74 504 2.70 2.00 0.74 528 2.60 1.92 0.74 552 21 20 3.06 1.90 0.62 504 2.94 1.82 0.62 534 2.85 1.77 0.62 546 2.75 1.71 0.62 570 22 18 2.94 2.29 0.78 480 2.81 2.19 0.78 504 2.70 2.11 0.78 528 2.60 2.03 0.78 552 22 20 3.06 2.02 0.66 504 2.94 1.94 0.66 534 2.85 1.88 0.66 546 2.75 1.82 0.66 570 22 22 3.19 1.72 0.54 522 3.08 1.66 0.54 555 3.00 1.62 0.54 570 2.88 1.55 0.54 594 23 18 2.94 2.41 0.82 480 2.81 2.31 0.82 504 2.70 2.21 0.82 528 2.60 2.13 0.82 552 23 20 3.06 2.14 0.70 504 2.94 2.06 0.70 534 2.85 2.00 0.70 546 2.75 1.93 0.70 570 23 22 3.19 1.85 0.58 522 3.08 1.78 0.58 555 3.00 1.74 0.58 570 2.88 1.67 0.58 594 24 18 2.94 2.53 0.86 480 2.81 2.42 0.86 504 2.70 2.32 0.86 528 2.60 2.24 0.86 552 24 20 3.06 2.27 0.74 504 2.94 2.17 0.74 534 2.85 2.11 0.74 546 2.75 2.04 0.74 570 24 22 3.19 1.98 0.62 522 3.08 1.91 0.62 555 3.00 1.86 0.62 570 2.88 1.78 0.62 594 24 24 3.35 1.68 0.50 546 3.23 1.61 0.50 576 3.15 1.58 0.50 594 3.05 1.53 0.50 624 25 18 2.94 2.64 0.90 480 2.81 2.53 0.90 504 2.70 2.43 0.90 528 2.60 2.34 0.90 552 25 20 3.06 2.39 0.78 504 2.94 2.29 0.78 534 2.85 2.22 0.78 546 2.75 2.15 0.78 570 25 22 3.19 2.10 0.66 522 3.08 2.03 0.66 555 3.00 1.98 0.66 570 2.88 1.90 0.66 594 25 24 3.35 1.81 0.54 546 3.23 1.74 0.54 576 3.15 1.70 0.54 594 3.05 1.65 0.54 624 26 18 2.94 2.76 0.94 480 2.81 2.64 0.94 504 2.70 2.54 0.94 528 2.60 2.44 0.94 552 26 20 3.06 2.51 0.82 504 2.94 2.41 0.82 534 2.85 2.34 0.82 546 2.75 2.26 0.82 570 26 22 3.19 2.23 0.70 522 3.08 2.15 0.70 555 3.00 2.10 0.70 570 2.88 2.01 0.70 594 26 24 3.35 1.94 0.58 546 3.23 1.87 0.58 576 3.15 1.83 0.58 594 3.05 1.77 0.58 624 26 26 3.45 1.59 0.46 576 3.35 1.54 0.46 606 3.30 1.52 0.46 624 3.20 1.47 0.46 642 27 18 2.94 2.88 0.98 480 2.81 2.76 0.98 504 2.70 2.65 0.98 528 2.60 2.55 0.98 552 27 20 3.06 2.63 0.86 504 2.94 2.53 0.86 534 2.85 2.45 0.86 546 2.75 2.37 0.86 570 27 22 3.19 2.36 0.74 522 3.08 2.28 0.74 555 3.00 2.22 0.74 570 2.88 2.13 0.74 594 27 24 3.35 2.08 0.62 546 3.23 2.00 0.62 576 3.15 1.95 0.62 594 3.05 1.89 0.62 624 27 26 3.45 1.73 0.50 576 3.35 1.68 0.50 606 3.30 1.65 0.50 624 3.20 1.60 0.50 642 28 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 28 20 3.06 2.76 0.90 504 2.94 2.64 0.90 534 2.85 2.57 0.90 546 2.75 2.48 0.90 570 28 22 3.19 2.49 0.78 522 3.08 2.40 0.78 555 3.00 2.34 0.78 570 2.88 2.24 0.78 594 28 24 3.35 2.21 0.66 546 3.23 2.13 0.66 576 3.15 2.08 0.66 594 3.05 2.01 0.66 624 28 26 3.45 1.86 0.54 576 3.35 1.81 0.54 606 3.30 1.78 0.54 624 3.20 1.73 0.54 642 29 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 29 20 3.06 2.88 0.94 504 2.94 2.76 0.94 534 2.85 2.68 0.94 546 2.75 2.59 0.94 570 29 22 3.19 2.61 0.82 522 3.08 2.52 0.82 555 3.00 2.46 0.82 570 2.88 2.36 0.82 594 29 24 3.35 2.35 0.70 546 3.23 2.26 0.70 576 3.15 2.21 0.70 594 3.05 2.14 0.70 624 29 26 3.45 2.00 0.58 576 3.35 1.94 0.58 606 3.30 1.91 0.58 624 3.20 1.86 0.58 642 30 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 30 20 3.06 3.00 0.98 504 2.94 2.88 0.98 534 2.85 2.79 0.98 546 2.75 2.70 0.98 570 30 22 3.19 2.74 0.86 522 3.08 2.64 0.86 555 3.00 2.58 0.86 570 2.88 2.47 0.86 594 30 24 3.35 2.48 0.74 546 3.23 2.39 0.74 576 3.15 2.33 0.74 594 3.05 2.26 0.74 624 30 26 3.45 2.14 0.62 576 3.35 2.08 0.62 606 3.30 2.05 0.62 624 3.20 1.98 0.62 642 31 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 31 20 3.06 3.06 1.00 504 2.94 2.94 1.00 534 2.85 2.85 1.00 546 2.75 2.75 1.00 570 31 22 3.19 2.87 0.90 522 3.08 2.77 0.90 555 3.00 2.70 0.90 570 2.88 2.59 0.90 594 31 24 3.35 2.61 0.78 546 3.23 2.52 0.78 576 3.15 2.46 0.78 594 3.05 2.38 0.78 624 31 26 3.45 2.28 0.66 576 3.35 2.21 0.66 606 3.30 2.18 0.66 624 3.20 2.11 0.66 642 32 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 32 20 3.06 3.06 1.00 504 2.94 2.94 1.00 534 2.85 2.85 1.00 546 2.75 2.75 1.00 570 32 22 3.19 3.00 0.94 522 3.08 2.89 0.94 555 3.00 2.82 0.94 570 2.88 2.70 0.94 594 32 24 3.35 2.75 0.82 546 3.23 2.64 0.82 576 3.15 2.58 0.82 594 3.05 2.50 0.82 624 32 26 3.45 2.42 0.70 576 3.35 2.35 0.70 606 3.30 2.31 0.70 624 3.20 2.24 0.70 642

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP25VG MUZ-AP25VGH

CAPACITY: 2.5 kW SHF: 0.92 INPUT: 600 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

35 40 46

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 2.45 1.81 0.74 588 2.25 1.67 0.74 624 2.08 1.54 0.74 648 21 20 2.58 1.60 0.62 612 2.40 1.49 0.62 642 2.23 1.38 0.62 678 22 18 2.45 1.91 0.78 588 2.25 1.76 0.78 624 2.08 1.62 0.78 648 22 20 2.58 1.70 0.66 612 2.40 1.58 0.66 642 2.23 1.47 0.66 678 22 22 2.73 1.47 0.54 636 2.55 1.38 0.54 672 2.38 1.28 0.54 696 23 18 2.45 2.01 0.82 588 2.25 1.85 0.82 624 2.08 1.70 0.82 648 23 20 2.58 1.80 0.70 612 2.40 1.68 0.70 642 2.23 1.56 0.70 678 23 22 2.73 1.58 0.58 636 2.55 1.48 0.58 672 2.38 1.38 0.58 696 24 18 2.45 2.11 0.86 588 2.25 1.94 0.86 624 2.08 1.78 0.86 648 24 20 2.58 1.91 0.74 612 2.40 1.78 0.74 642 2.23 1.65 0.74 678 24 22 2.73 1.69 0.62 636 2.55 1.58 0.62 672 2.38 1.47 0.62 696 24 24 2.88 1.44 0.50 660 2.70 1.35 0.50 690 2.55 1.28 0.50 720 25 18 2.45 2.21 0.90 588 2.25 2.03 0.90 624 2.08 1.87 0.9 648 25 20 2.58 2.01 0.78 612 2.40 1.87 0.78 642 2.23 1.74 0.78 678 25 22 2.73 1.80 0.66 636 2.55 1.68 0.66 672 2.38 1.57 0.66 696 25 24 2.88 1.55 0.54 660 2.70 1.46 0.54 690 2.55 1.38 0.54 720 26 18 2.45 2.30 0.94 588 2.25 2.12 0.94 624 2.08 1.95 0.94 648 26 20 2.58 2.11 0.82 612 2.40 1.97 0.82 642 2.23 1.82 0.82 678 26 22 2.73 1.91 0.70 636 2.55 1.79 0.70 672 2.38 1.66 0.70 696 26 24 2.88 1.67 0.58 660 2.70 1.57 0.58 690 2.55 1.48 0.58 720 26 26 3.03 1.39 0.46 684 2.85 1.31 0.46 714 2.68 1.23 0.46 744 27 18 2.45 2.40 0.98 588 2.25 2.21 0.98 624 2.08 2.03 0.98 648 27 20 2.58 2.21 0.86 612 2.40 2.06 0.86 642 2.23 1.91 0.86 678 27 22 2.73 2.02 0.74 636 2.55 1.89 0.74 672 2.38 1.76 0.74 696 27 24 2.88 1.78 0.62 660 2.70 1.67 0.62 690 2.55 1.58 0.62 720 27 26 3.03 1.51 0.50 684 2.85 1.43 0.50 714 2.68 1.34 0.50 744 28 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 28 20 2.58 2.32 0.90 612 2.40 2.16 0.90 642 2.23 2.00 0.90 678 28 22 2.73 2.13 0.78 636 2.55 1.99 0.78 672 2.38 1.85 0.78 696 28 24 2.88 1.90 0.66 660 2.70 1.78 0.66 690 2.55 1.68 0.66 720 28 26 3.03 1.63 0.54 684 2.85 1.54 0.54 714 2.68 1.44 0.54 744 29 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 29 20 2.58 2.42 0.94 612 2.40 2.26 0.94 642 2.23 2.09 0.94 678 29 22 2.73 2.23 0.82 636 2.55 2.09 0.82 672 2.38 1.95 0.82 696 29 24 2.88 2.01 0.70 660 2.70 1.89 0.70 690 2.55 1.79 0.70 720 29 26 3.03 1.75 0.58 684 2.85 1.65 0.58 714 2.68 1.55 0.58 744 30 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 30 20 2.58 2.52 0.98 612 2.40 2.35 0.98 642 2.23 2.18 0.98 678 30 22 2.73 2.34 0.86 636 2.55 2.19 0.86 672 2.38 2.04 0.86 696 30 24 2.88 2.13 0.74 660 2.70 2.00 0.74 690 2.55 1.89 0.74 720 30 26 3.03 1.88 0.62 684 2.85 1.77 0.62 714 2.68 1.66 0.62 744 31 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 31 20 2.58 2.58 1.00 612 2.40 2.40 1.00 642 2.23 2.23 1.00 678 31 22 2.73 2.45 0.90 636 2.55 2.30 0.90 672 2.38 2.14 0.90 696 31 24 2.88 2.24 0.78 660 2.70 2.11 0.78 690 2.55 1.99 0.78 720 31 26 3.03 2.00 0.66 684 2.85 1.88 0.66 714 2.68 1.77 0.66 744 32 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 32 20 2.58 2.58 1.00 612 2.40 2.40 1.00 642 2.23 2.23 1.00 678 32 22 2.73 2.56 0.94 636 2.55 2.40 0.94 672 2.38 2.23 0.94 696 32 24 2.88 2.36 0.82 660 2.70 2.21 0.82 690 2.55 2.09 0.82 720 32 26 3.03 2.12 0.70 684 2.85 2.00 0.70 714 2.68 1.87 0.70 744

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP35VG MUZ-AP35VGH

CAPACITY: 3.5 kW SHF: 0.88 INPUT: 990 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 4.11 2.88 0.70 792 3.94 2.76 0.70 832 3.78 2.65 0.70 871 3.64 2.55 0.70 911 21 20 4.29 2.49 0.58 832 4.11 2.39 0.58 881 3.99 2.31 0.58 901 3.85 2.23 0.58 941 22 18 4.11 3.04 0.74 792 3.94 2.91 0.74 832 3.78 2.80 0.74 871 3.64 2.69 0.74 911 22 20 4.29 2.66 0.62 832 4.11 2.55 0.62 881 3.99 2.47 0.62 901 3.85 2.39 0.62 941 22 22 4.46 2.23 0.50 861 4.31 2.15 0.50 916 4.20 2.10 0.50 941 4.03 2.01 0.50 980 23 18 4.11 3.21 0.78 792 3.94 3.07 0.78 832 3.78 2.95 0.78 871 3.64 2.84 0.78 911 23 20 4.29 2.83 0.66 832 4.11 2.71 0.66 881 3.99 2.63 0.66 901 3.85 2.54 0.66 941 23 22 4.46 2.41 0.54 861 4.31 2.32 0.54 916 4.20 2.27 0.54 941 4.03 2.17 0.54 980 24 18 4.11 3.37 0.82 792 3.94 3.23 0.82 832 3.78 3.10 0.82 871 3.64 2.98 0.82 911 24 20 4.29 3.00 0.70 832 4.11 2.88 0.70 881 3.99 2.79 0.70 901 3.85 2.70 0.70 941 24 22 4.46 2.59 0.58 861 4.31 2.50 0.58 916 4.20 2.44 0.58 941 4.03 2.33 0.58 980 24 24 4.69 2.16 0.46 901 4.52 2.08 0.46 950 4.41 2.03 0.46 980 4.27 1.96 0.46 1030 25 18 4.11 3.54 0.86 792 3.94 3.39 0.86 832 3.78 3.25 0.86 871 3.64 3.13 0.86 911 25 20 4.29 3.17 0.74 832 4.11 3.04 0.74 881 3.99 2.95 0.74 901 3.85 2.85 0.74 941 25 22 4.46 2.77 0.62 861 4.31 2.67 0.62 916 4.20 2.60 0.62 941 4.03 2.50 0.62 980 25 24 4.69 2.35 0.50 901 4.52 2.26 0.50 950 4.41 2.21 0.50 980 4.27 2.14 0.50 1030 26 18 4.11 3.70 0.90 792 3.94 3.54 0.90 832 3.78 3.40 0.90 871 3.64 3.28 0.90 911 26 20 4.29 3.34 0.78 832 4.11 3.21 0.78 881 3.99 3.11 0.78 901 3.85 3.00 0.78 941 26 22 4.46 2.95 0.66 861 4.31 2.84 0.66 916 4.20 2.77 0.66 941 4.03 2.66 0.66 980 26 24 4.69 2.53 0.54 901 4.52 2.44 0.54 950 4.41 2.38 0.54 980 4.27 2.31 0.54 1030 26 26 4.83 2.03 0.42 950 4.69 1.97 0.42 1000 4.62 1.94 0.42 1030 4.48 1.88 0.42 1059 27 18 4.11 3.87 0.94 792 3.94 3.70 0.94 832 3.78 3.55 0.94 871 3.64 3.42 0.94 911 27 20 4.29 3.52 0.82 832 4.11 3.37 0.82 881 3.99 3.27 0.82 901 3.85 3.16 0.82 941 27 22 4.46 3.12 0.70 861 4.31 3.01 0.70 916 4.20 2.94 0.70 941 4.03 2.82 0.70 980 27 24 4.69 2.72 0.58 901 4.52 2.62 0.58 950 4.41 2.56 0.58 980 4.27 2.48 0.58 1030 27 26 4.83 2.22 0.46 950 4.69 2.16 0.46 1000 4.62 2.13 0.46 1030 4.48 2.06 0.46 1059 28 18 4.11 4.03 0.98 792 3.94 3.86 0.98 832 3.78 3.70 0.98 871 3.64 3.57 0.98 911 28 20 4.29 3.69 0.86 832 4.11 3.54 0.86 881 3.99 3.43 0.86 901 3.85 3.31 0.86 941 28 22 4.46 3.30 0.74 861 4.31 3.19 0.74 916 4.20 3.11 0.74 941 4.03 2.98 0.74 980 28 24 4.69 2.91 0.62 901 4.52 2.80 0.62 950 4.41 2.73 0.62 980 4.27 2.65 0.62 1030 28 26 4.83 2.42 0.50 950 4.69 2.35 0.50 1000 4.62 2.31 0.50 1030 4.48 2.24 0.50 1059 29 18 4.11 4.11 1.00 792 3.94 3.94 1.00 832 3.78 3.78 1.00 871 3.64 3.64 1.00 911 29 20 4.29 3.86 0.90 832 4.11 3.70 0.90 881 3.99 3.59 0.90 901 3.85 3.47 0.90 941 29 22 4.46 3.48 0.78 861 4.31 3.36 0.78 916 4.20 3.28 0.78 941 4.03 3.14 0.78 980 29 24 4.69 3.10 0.66 901 4.52 2.98 0.66 950 4.41 2.91 0.66 980 4.27 2.82 0.66 1030 29 26 4.83 2.61 0.54 950 4.69 2.53 0.54 1000 4.62 2.49 0.54 1030 4.48 2.42 0.54 1059 30 18 4.11 4.11 1.00 792 3.94 3.94 1.00 832 3.78 3.78 1.00 871 3.64 3.64 1.00 911 30 20 4.29 4.03 0.94 832 4.11 3.87 0.94 881 3.99 3.75 0.94 901 3.85 3.62 0.94 941 30 22 4.46 3.66 0.82 861 4.31 3.53 0.82 916 4.20 3.44 0.82 941 4.03 3.30 0.82 980 30 24 4.69 3.28 0.70 901 4.52 3.16 0.70 950 4.41 3.09 0.70 980 4.27 2.99 0.70 1030 30 26 4.83 2.80 0.58 950 4.69 2.72 0.58 1000 4.62 2.68 0.58 1030 4.48 2.60 0.58 1059 31 18 4.11 4.11 1.00 792 3.94 3.94 1.00 832 3.78 3.78 1.00 871 3.64 3.64 1.00 911 31 20 4.29 4.20 0.98 832 4.11 4.03 0.98 881 3.99 3.91 0.98 901 3.85 3.77 0.98 941 31 22 4.46 3.84 0.86 861 4.31 3.70 0.86 916 4.20 3.61 0.86 941 4.03 3.46 0.86 980 31 24 4.69 3.47 0.74 901 4.52 3.34 0.74 950 4.41 3.26 0.74 980 4.27 3.16 0.74 1030 31 26 4.83 2.99 0.62 950 4.69 2.91 0.62 1000 4.62 2.86 0.62 1030 4.48 2.78 0.62 1059 32 18 4.11 4.11 1.00 792 3.94 3.94 1.00 832 3.78 3.78 1.00 871 3.64 3.64 1.00 911 32 20 4.29 4.29 1.00 832 4.11 4.11 1.00 881 3.99 3.99 1.00 901 3.85 3.85 1.00 941 32 22 4.46 4.02 0.90 861 4.31 3.87 0.90 916 4.20 3.78 0.90 941 4.03 3.62 0.90 980 32 24 4.69 3.66 0.78 901 4.52 3.52 0.78 950 4.41 3.44 0.78 980 4.27 3.33 0.78 1030 32 26 4.83 3.19 0.66 950 4.69 3.10 0.66 1000 4.62 3.05 0.66 1030 4.48 2.96 0.66 1059

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP35VG MUZ-AP35VGH

CAPACITY: 3.5 kW SHF: 0.88 INPUT: 990 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

35 40 46

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 3.43 2.40 0.70 970 3.15 2.21 0.70 1030 2.91 2.03 0.70 1069 21 20 3.61 2.09 0.58 1010 3.36 1.95 0.58 1059 3.12 1.81 0.58 1119 22 18 3.43 2.54 0.74 970 3.15 2.33 0.74 1030 2.91 2.15 0.74 1069 22 20 3.61 2.24 0.62 1010 3.36 2.08 0.62 1059 3.12 1.93 0.62 1119 22 22 3.82 1.91 0.50 1049 3.57 1.79 0.50 1109 3.33 1.66 0.50 1148 23 18 3.43 2.68 0.78 970 3.15 2.46 0.78 1030 2.91 2.27 0.78 1069 23 20 3.61 2.38 0.66 1010 3.36 2.22 0.66 1059 3.12 2.06 0.66 1119 23 22 3.82 2.06 0.54 1049 3.57 1.93 0.54 1109 3.33 1.80 0.54 1148 24 18 3.43 2.81 0.82 970 3.15 2.58 0.82 1030 2.91 2.38 0.82 1069 24 20 3.61 2.52 0.70 1010 3.36 2.35 0.70 1059 3.12 2.18 0.70 1119 24 22 3.82 2.21 0.58 1049 3.57 2.07 0.58 1109 3.33 1.93 0.58 1148 24 24 4.03 1.85 0.46 1089 3.78 1.74 0.46 1139 3.57 1.64 0.46 1188 25 18 3.43 2.95 0.86 970 3.15 2.71 0.86 1030 2.91 2.50 0.86 1069 25 20 3.61 2.67 0.74 1010 3.36 2.49 0.74 1059 3.12 2.31 0.74 1119 25 22 3.82 2.37 0.62 1049 3.57 2.21 0.62 1109 3.33 2.06 0.62 1148 25 24 4.03 2.01 0.50 1089 3.78 1.89 0.50 1139 3.57 1.79 0.50 1188 26 18 3.43 3.09 0.90 970 3.15 2.84 0.90 1030 2.91 2.61 0.90 1069 26 20 3.61 2.81 0.78 1010 3.36 2.62 0.78 1059 3.12 2.43 0.78 1119 26 22 3.82 2.52 0.66 1049 3.57 2.36 0.66 1109 3.33 2.19 0.66 1148 26 24 4.03 2.17 0.54 1089 3.78 2.04 0.54 1139 3.57 1.93 0.54 1188 26 26 4.24 1.78 0.42 1129 3.99 1.68 0.42 1178 3.75 1.57 0.42 1228 27 18 3.43 3.22 0.94 970 3.15 2.96 0.94 1030 2.91 2.73 0.94 1069 27 20 3.61 2.96 0.82 1010 3.36 2.76 0.82 1059 3.12 2.55 0.82 1119 27 22 3.82 2.67 0.70 1049 3.57 2.50 0.70 1109 3.33 2.33 0.70 1148 27 24 4.03 2.33 0.58 1089 3.78 2.19 0.58 1139 3.57 2.07 0.58 1188 27 26 4.24 1.95 0.46 1129 3.99 1.84 0.46 1178 3.75 1.72 0.46 1228 28 18 3.43 3.36 0.98 970 3.15 3.09 0.98 1030 2.91 2.85 0.98 1069 28 20 3.61 3.10 0.86 1010 3.36 2.89 0.86 1059 3.12 2.68 0.86 1119 28 22 3.82 2.82 0.74 1049 3.57 2.64 0.74 1109 3.33 2.46 0.74 1148 28 24 4.03 2.50 0.62 1089 3.78 2.34 0.62 1139 3.57 2.21 0.62 1188 28 26 4.24 2.12 0.50 1129 3.99 2.00 0.50 1178 3.75 1.87 0.50 1228 29 18 3.43 3.43 1.00 970 3.15 3.15 1.00 1030 2.91 2.91 1.00 1069 29 20 3.61 3.24 0.90 1010 3.36 3.02 0.90 1059 3.12 2.80 0.90 1119 29 22 3.82 2.98 0.78 1049 3.57 2.78 0.78 1109 3.33 2.59 0.78 1148 29 24 4.03 2.66 0.66 1089 3.78 2.49 0.66 1139 3.57 2.36 0.66 1188 29 26 4.24 2.29 0.54 1129 3.99 2.15 0.54 1178 3.75 2.02 0.54 1228 30 18 3.43 3.43 1.00 970 3.15 3.15 1.00 1030 2.91 2.91 1.00 1069 30 20 3.61 3.39 0.94 1010 3.36 3.16 0.94 1059 3.12 2.93 0.94 1119 30 22 3.82 3.13 0.82 1049 3.57 2.93 0.82 1109 3.33 2.73 0.82 1148 30 24 4.03 2.82 0.70 1089 3.78 2.65 0.70 1139 3.57 2.50 0.70 1188 30 26 4.24 2.46 0.58 1129 3.99 2.31 0.58 1178 3.75 2.17 0.58 1228 31 18 3.43 3.43 1.00 970 3.15 3.15 1.00 1030 2.91 2.91 1.00 1069 31 20 3.61 3.53 0.98 1010 3.36 3.29 0.98 1059 3.12 3.05 0.98 1119 31 22 3.82 3.28 0.86 1049 3.57 3.07 0.86 1109 3.33 2.86 0.86 1148 31 24 4.03 2.98 0.74 1089 3.78 2.80 0.74 1139 3.57 2.64 0.74 1188 31 26 4.24 2.63 0.62 1129 3.99 2.47 0.62 1178 3.75 2.32 0.62 1228 32 18 3.43 3.43 1.00 970 3.15 3.15 1.00 1030 2.91 2.91 1.00 1069 32 20 3.61 3.61 1.00 1010 3.36 3.36 1.00 1059 3.12 3.12 1.00 1119 32 22 3.82 3.43 0.90 1049 3.57 3.21 0.90 1109 3.33 2.99 0.90 1148 32 24 4.03 3.14 0.78 1089 3.78 2.95 0.78 1139 3.57 2.78 0.78 1188 32 26 4.24 2.80 0.66 1129 3.99 2.63 0.66 1178 3.75 2.47 0.66 1228

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP42VG MUZ-AP42VGH

CAPACITY: 4.2 kW SHF: 0.77 INPUT: 1300 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 4.94 2.91 0.59 1040 4.73 2.79 0.59 1092 4.54 2.68 0.59 1144 4.37 2.58 0.59 1196 21 20 5.15 2.42 0.47 1092 4.94 2.32 0.47 1157 4.79 2.25 0.47 1183 4.62 2.17 0.47 1235 22 18 4.94 3.11 0.63 1040 4.73 2.98 0.63 1092 4.54 2.86 0.63 1144 4.37 2.75 0.63 1196 22 20 5.15 2.62 0.51 1092 4.94 2.52 0.51 1157 4.79 2.44 0.51 1183 4.62 2.36 0.51 1235 22 22 5.36 2.09 0.39 1131 5.17 2.01 0.39 1203 5.04 1.97 0.39 1235 4.83 1.88 0.39 1287 23 18 4.94 3.31 0.67 1040 4.73 3.17 0.67 1092 4.54 3.04 0.67 1144 4.37 2.93 0.67 1196 23 20 5.15 2.83 0.55 1092 4.94 2.71 0.55 1157 4.79 2.63 0.55 1183 4.62 2.54 0.55 1235 23 22 5.36 2.30 0.43 1131 5.17 2.22 0.43 1203 5.04 2.17 0.43 1235 4.83 2.08 0.43 1287 24 18 4.94 3.50 0.71 1040 4.73 3.35 0.71 1092 4.54 3.22 0.71 1144 4.37 3.10 0.71 1196 24 20 5.15 3.04 0.59 1092 4.94 2.91 0.59 1157 4.79 2.82 0.59 1183 4.62 2.73 0.59 1235 24 22 5.36 2.52 0.47 1131 5.17 2.43 0.47 1203 5.04 2.37 0.47 1235 4.83 2.27 0.47 1287 24 24 5.63 1.97 0.35 1183 5.42 1.90 0.35 1248 5.29 1.85 0.35 1287 5.12 1.79 0.35 1352 25 18 4.94 3.70 0.75 1040 4.73 3.54 0.75 1092 4.54 3.40 0.75 1144 4.37 3.28 0.75 1196 25 20 5.15 3.24 0.63 1092 4.94 3.11 0.63 1157 4.79 3.02 0.63 1183 4.62 2.91 0.63 1235 25 22 5.36 2.73 0.51 1131 5.17 2.63 0.51 1203 5.04 2.57 0.51 1235 4.83 2.46 0.51 1287 25 24 5.63 2.19 0.39 1183 5.42 2.11 0.39 1248 5.29 2.06 0.39 1287 5.12 2.00 0.39 1352 26 18 4.94 3.90 0.79 1040 4.73 3.73 0.79 1092 4.54 3.58 0.79 1144 4.37 3.45 0.79 1196 26 20 5.15 3.45 0.67 1092 4.94 3.31 0.67 1157 4.79 3.21 0.67 1183 4.62 3.10 0.67 1235 26 22 5.36 2.95 0.55 1131 5.17 2.84 0.55 1203 5.04 2.77 0.55 1235 4.83 2.66 0.55 1287 26 24 5.63 2.42 0.43 1183 5.42 2.33 0.43 1248 5.29 2.28 0.43 1287 5.12 2.20 0.43 1352 26 26 5.80 1.80 0.31 1248 5.63 1.74 0.31 1313 5.54 1.72 0.31 1352 5.38 1.67 0.31 1391 27 18 4.94 4.10 0.83 1040 4.73 3.92 0.83 1092 4.54 3.76 0.83 1144 4.37 3.63 0.83 1196 27 20 5.15 3.65 0.71 1092 4.94 3.50 0.71 1157 4.79 3.40 0.71 1183 4.62 3.28 0.71 1235 27 22 5.36 3.16 0.59 1131 5.17 3.05 0.59 1203 5.04 2.97 0.59 1235 4.83 2.85 0.59 1287 27 24 5.63 2.65 0.47 1183 5.42 2.55 0.47 1248 5.29 2.49 0.47 1287 5.12 2.41 0.47 1352 27 26 5.80 2.03 0.35 1248 5.63 1.97 0.35 1313 5.54 1.94 0.35 1352 5.38 1.88 0.35 1391 28 18 4.94 4.29 0.87 1040 4.73 4.11 0.87 1092 4.54 3.95 0.87 1144 4.37 3.80 0.87 1196 28 20 5.15 3.86 0.75 1092 4.94 3.70 0.75 1157 4.79 3.59 0.75 1183 4.62 3.47 0.75 1235 28 22 5.36 3.37 0.63 1131 5.17 3.25 0.63 1203 5.04 3.18 0.63 1235 4.83 3.04 0.63 1287 28 24 5.63 2.87 0.51 1183 5.42 2.76 0.51 1248 5.29 2.70 0.51 1287 5.12 2.61 0.51 1352 28 26 5.80 2.26 0.39 1248 5.63 2.19 0.39 1313 5.54 2.16 0.39 1352 5.38 2.10 0.39 1391 29 18 4.94 4.49 0.91 1040 4.73 4.30 0.91 1092 4.54 4.13 0.91 1144 4.37 3.97 0.91 1196 29 20 5.15 4.06 0.79 1092 4.94 3.90 0.79 1157 4.79 3.78 0.79 1183 4.62 3.65 0.79 1235 29 22 5.36 3.59 0.67 1131 5.17 3.46 0.67 1203 5.04 3.38 0.67 1235 4.83 3.24 0.67 1287 29 24 5.63 3.10 0.55 1183 5.42 2.98 0.55 1248 5.29 2.91 0.55 1287 5.12 2.82 0.55 1352 29 26 5.80 2.49 0.43 1248 5.63 2.42 0.43 1313 5.54 2.38 0.43 1352 5.38 2.31 0.43 1391 30 18 4.94 4.69 0.95 1040 4.73 4.49 0.95 1092 4.54 4.31 0.95 1144 4.37 4.15 0.95 1196 30 20 5.15 4.27 0.83 1092 4.94 4.10 0.83 1157 4.79 3.97 0.83 1183 4.62 3.83 0.83 1235 30 22 5.36 3.80 0.71 1131 5.17 3.67 0.71 1203 5.04 3.58 0.71 1235 4.83 3.43 0.71 1287 30 24 5.63 3.32 0.59 1183 5.42 3.20 0.59 1248 5.29 3.12 0.59 1287 5.12 3.02 0.59 1352 30 26 5.80 2.72 0.47 1248 5.63 2.65 0.47 1313 5.54 2.61 0.47 1352 5.38 2.53 0.47 1391 31 18 4.94 4.89 0.99 1040 4.73 4.68 0.99 1092 4.54 4.49 0.99 1144 4.37 4.32 0.99 1196 31 20 5.15 4.48 0.87 1092 4.94 4.29 0.87 1157 4.79 4.17 0.87 1183 4.62 4.02 0.87 1235 31 22 5.36 4.02 0.75 1131 5.17 3.87 0.75 1203 5.04 3.78 0.75 1235 4.83 3.62 0.75 1287 31 24 5.63 3.55 0.63 1183 5.42 3.41 0.63 1248 5.29 3.33 0.63 1287 5.12 3.23 0.63 1352 31 26 5.80 2.96 0.51 1248 5.63 2.87 0.51 1313 5.54 2.83 0.51 1352 5.38 2.74 0.51 1391 32 18 4.94 4.94 1.00 1040 4.73 4.73 1.00 1092 4.54 4.54 1.00 1144 4.37 4.37 1.00 1196 32 20 5.15 4.68 0.91 1092 4.94 4.49 0.91 1157 4.79 4.36 0.91 1183 4.62 4.20 0.91 1235 32 22 5.36 4.23 0.79 1131 5.17 4.08 0.79 1203 5.04 3.98 0.79 1235 4.83 3.82 0.79 1287 32 24 5.63 3.77 0.67 1183 5.42 3.63 0.67 1248 5.29 3.55 0.67 1287 5.12 3.43 0.67 1352 32 26 5.80 3.19 0.55 1248 5.63 3.10 0.55 1313 5.54 3.05 0.55 1352 5.38 2.96 0.55 1391

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP42VG MUZ-AP42VGH

CAPACITY: 4.2 kW SHF: 0.77 INPUT: 1300 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

35 40 46

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 4.12 2.43 0.59 1274 3.78 2.23 0.59 1352 3.49 2.06 0.59 1404 21 20 4.33 2.03 0.47 1326 4.03 1.90 0.47 1391 3.74 1.76 0.47 1469 22 18 4.12 2.59 0.63 1274 3.78 2.38 0.63 1352 3.49 2.20 0.63 1404 22 20 4.33 2.21 0.51 1326 4.03 2.06 0.51 1391 3.74 1.91 0.51 1469 22 22 4.58 1.79 0.39 1378 4.28 1.67 0.39 1456 3.99 1.56 0.39 1508 23 18 4.12 2.76 0.67 1274 3.78 2.53 0.67 1352 3.49 2.34 0.67 1404 23 20 4.33 2.38 0.55 1326 4.03 2.22 0.55 1391 3.74 2.06 0.55 1469 23 22 4.58 1.97 0.43 1378 4.28 1.84 0.43 1456 3.99 1.72 0.43 1508 24 18 4.12 2.92 0.71 1274 3.78 2.68 0.71 1352 3.49 2.48 0.71 1404 24 20 4.33 2.55 0.59 1326 4.03 2.38 0.59 1391 3.74 2.21 0.59 1469 24 22 4.58 2.15 0.47 1378 4.28 2.01 0.47 1456 3.99 1.88 0.47 1508 24 24 4.83 1.69 0.35 1430 4.54 1.59 0.35 1495 4.28 1.50 0.35 1560 25 18 4.12 3.09 0.75 1274 3.78 2.84 0.75 1352 3.49 2.61 0.75 1404 25 20 4.33 2.73 0.63 1326 4.03 2.54 0.63 1391 3.74 2.35 0.63 1469 25 22 4.58 2.33 0.51 1378 4.28 2.18 0.51 1456 3.99 2.03 0.51 1508 25 24 4.83 1.88 0.39 1430 4.54 1.77 0.39 1495 4.28 1.67 0.39 1560 26 18 4.12 3.25 0.79 1274 3.78 2.99 0.79 1352 3.49 2.75 0.79 1404 26 20 4.33 2.90 0.67 1326 4.03 2.70 0.67 1391 3.74 2.50 0.67 1469 26 22 4.58 2.52 0.55 1378 4.28 2.36 0.55 1456 3.99 2.19 0.55 1508 26 24 4.83 2.08 0.43 1430 4.54 1.95 0.43 1495 4.28 1.84 0.43 1560 26 26 5.08 1.58 0.31 1482 4.79 1.48 0.31 1547 4.49 1.39 0.31 1612 27 18 4.12 3.42 0.83 1274 3.78 3.14 0.83 1352 3.49 2.89 0.83 1404 27 20 4.33 3.07 0.71 1326 4.03 2.86 0.71 1391 3.74 2.65 0.71 1469 27 22 4.58 2.70 0.59 1378 4.28 2.53 0.59 1456 3.99 2.35 0.59 1508 27 24 4.83 2.27 0.47 1430 4.54 2.13 0.47 1495 4.28 2.01 0.47 1560 27 26 5.08 1.78 0.35 1482 4.79 1.68 0.35 1547 4.49 1.57 0.35 1612 28 18 4.12 3.58 0.87 1274 3.78 3.29 0.87 1352 3.49 3.03 0.87 1404 28 20 4.33 3.24 0.75 1326 4.03 3.02 0.75 1391 3.74 2.80 0.75 1469 28 22 4.58 2.88 0.63 1378 4.28 2.70 0.63 1456 3.99 2.51 0.63 1508 28 24 4.83 2.46 0.51 1430 4.54 2.31 0.51 1495 4.28 2.18 0.51 1560 28 26 5.08 1.98 0.39 1482 4.79 1.87 0.39 1547 4.49 1.75 0.39 1612 29 18 4.12 3.75 0.91 1274 3.78 3.44 0.91 1352 3.49 3.17 0.91 1404 29 20 4.33 3.42 0.79 1326 4.03 3.19 0.79 1391 3.74 2.95 0.79 1469 29 22 4.58 3.07 0.67 1378 4.28 2.87 0.67 1456 3.99 2.67 0.67 1508 29 24 4.83 2.66 0.55 1430 4.54 2.49 0.55 1495 4.28 2.36 0.55 1560 29 26 5.08 2.19 0.43 1482 4.79 2.06 0.43 1547 4.49 1.93 0.43 1612 30 18 4.12 3.91 0.95 1274 3.78 3.59 0.95 1352 3.49 3.31 0.95 1404 30 20 4.33 3.59 0.83 1326 4.03 3.35 0.83 1391 3.74 3.10 0.83 1469 30 22 4.58 3.25 0.71 1378 4.28 3.04 0.71 1456 3.99 2.83 0.71 1508 30 24 4.83 2.85 0.59 1430 4.54 2.68 0.59 1495 4.28 2.53 0.59 1560 30 26 5.08 2.39 0.47 1482 4.79 2.25 0.47 1547 4.49 2.11 0.47 1612 31 18 4.12 4.07 0.99 1274 3.78 3.74 0.99 1352 3.49 3.45 0.99 1404 31 20 4.33 3.76 0.87 1326 4.03 3.51 0.87 1391 3.74 3.25 0.87 1469 31 22 4.58 3.43 0.75 1378 4.28 3.21 0.75 1456 3.99 2.99 0.75 1508 31 24 4.83 3.04 0.63 1430 4.54 2.86 0.63 1495 4.28 2.70 0.63 1560 31 26 5.08 2.59 0.51 1482 4.79 2.44 0.51 1547 4.49 2.29 0.51 1612 32 18 4.12 4.12 1.00 1274 3.78 3.78 1.00 1352 3.49 3.49 1.00 1404 32 20 4.33 3.94 0.91 1326 4.03 3.67 0.91 1391 3.74 3.40 0.91 1469 32 22 4.58 3.62 0.79 1378 4.28 3.38 0.79 1456 3.99 3.15 0.79 1508 32 24 4.83 3.24 0.67 1430 4.54 3.04 0.67 1495 4.28 2.87 0.67 1560 32 26 5.08 2.80 0.55 1482 4.79 2.63 0.55 1547 4.49 2.47 0.55 1612

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP50VG MUZ-AP50VGH

CAPACITY: 5.0 kW SHF: 0.74 INPUT: 1550 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 5.88 3.29 0.56 1240 5.63 3.15 0.56 1302 5.40 3.02 0.56 1364 5.20 2.91 0.56 1426 21 20 6.13 2.70 0.44 1302 5.88 2.59 0.44 1380 5.70 2.51 0.44 1411 5.50 2.42 0.44 1473 22 18 5.88 3.53 0.60 1240 5.63 3.38 0.60 1302 5.40 3.24 0.60 1364 5.20 3.12 0.60 1426 22 20 6.13 2.94 0.48 1302 5.88 2.82 0.48 1380 5.70 2.74 0.48 1411 5.50 2.64 0.48 1473 22 22 6.38 2.30 0.36 1349 6.15 2.21 0.36 1434 6.00 2.16 0.36 1473 5.75 2.07 0.36 1535 23 18 5.88 3.76 0.64 1240 5.63 3.60 0.64 1302 5.40 3.46 0.64 1364 5.20 3.33 0.64 1426 23 20 6.13 3.19 0.52 1302 5.88 3.06 0.52 1380 5.70 2.96 0.52 1411 5.50 2.86 0.52 1473 23 22 6.38 2.55 0.40 1349 6.15 2.46 0.40 1434 6.00 2.40 0.40 1473 5.75 2.30 0.40 1535 24 18 5.88 4.00 0.68 1240 5.63 3.83 0.68 1302 5.40 3.67 0.68 1364 5.20 3.54 0.68 1426 24 20 6.13 3.43 0.56 1302 5.88 3.29 0.56 1380 5.70 3.19 0.56 1411 5.50 3.08 0.56 1473 24 22 6.38 2.81 0.44 1349 6.15 2.71 0.44 1434 6.00 2.64 0.44 1473 5.75 2.53 0.44 1535 24 24 6.70 2.14 0.32 1411 6.45 2.06 0.32 1488 6.30 2.02 0.32 1535 6.10 1.95 0.32 1612 25 18 5.88 4.23 0.72 1240 5.63 4.05 0.72 1302 5.40 3.89 0.72 1364 5.20 3.74 0.72 1426 25 20 6.13 3.68 0.60 1302 5.88 3.53 0.60 1380 5.70 3.42 0.60 1411 5.50 3.30 0.60 1473 25 22 6.38 3.06 0.48 1349 6.15 2.95 0.48 1434 6.00 2.88 0.48 1473 5.75 2.76 0.48 1535 25 24 6.70 2.41 0.36 1411 6.45 2.32 0.36 1488 6.30 2.27 0.36 1535 6.10 2.20 0.36 1612 26 18 5.88 4.47 0.76 1240 5.63 4.28 0.76 1302 5.40 4.10 0.76 1364 5.20 3.95 0.76 1426 26 20 6.13 3.92 0.64 1302 5.88 3.76 0.64 1380 5.70 3.65 0.64 1411 5.50 3.52 0.64 1473 26 22 6.38 3.32 0.52 1349 6.15 3.20 0.52 1434 6.00 3.12 0.52 1473 5.75 2.99 0.52 1535 26 24 6.70 2.68 0.40 1411 6.45 2.58 0.40 1488 6.30 2.52 0.40 1535 6.10 2.44 0.40 1612 26 26 6.90 1.93 0.28 1488 6.70 1.88 0.28 1566 6.60 1.85 0.28 1612 6.40 1.79 0.28 1659 27 18 5.88 4.70 0.80 1240 5.63 4.50 0.80 1302 5.40 4.32 0.80 1364 5.20 4.16 0.80 1426 27 20 6.13 4.17 0.68 1302 5.88 4.00 0.68 1380 5.70 3.88 0.68 1411 5.50 3.74 0.68 1473 27 22 6.38 3.57 0.56 1349 6.15 3.44 0.56 1434 6.00 3.36 0.56 1473 5.75 3.22 0.56 1535 27 24 6.70 2.95 0.44 1411 6.45 2.84 0.44 1488 6.30 2.77 0.44 1535 6.10 2.68 0.44 1612 27 26 6.90 2.21 0.32 1488 6.70 2.14 0.32 1566 6.60 2.11 0.32 1612 6.40 2.05 0.32 1659 28 18 5.88 4.94 0.84 1240 5.63 4.73 0.84 1302 5.40 4.54 0.84 1364 5.20 4.37 0.84 1426 28 20 6.13 4.41 0.72 1302 5.88 4.23 0.72 1380 5.70 4.10 0.72 1411 5.50 3.96 0.72 1473 28 22 6.38 3.83 0.60 1349 6.15 3.69 0.60 1434 6.00 3.60 0.60 1473 5.75 3.45 0.60 1535 28 24 6.70 3.22 0.48 1411 6.45 3.10 0.48 1488 6.30 3.02 0.48 1535 6.10 2.93 0.48 1612 28 26 6.90 2.48 0.36 1488 6.70 2.41 0.36 1566 6.60 2.38 0.36 1612 6.40 2.30 0.36 1659 29 18 5.88 5.17 0.88 1240 5.63 4.95 0.88 1302 5.40 4.75 0.88 1364 5.20 4.58 0.88 1426 29 20 6.13 4.66 0.76 1302 5.88 4.47 0.76 1380 5.70 4.33 0.76 1411 5.50 4.18 0.76 1473 29 22 6.38 4.08 0.64 1349 6.15 3.94 0.64 1434 6.00 3.84 0.64 1473 5.75 3.68 0.64 1535 29 24 6.70 3.48 0.52 1411 6.45 3.35 0.52 1488 6.30 3.28 0.52 1535 6.10 3.17 0.52 1612 29 26 6.90 2.76 0.40 1488 6.70 2.68 0.40 1566 6.60 2.64 0.40 1612 6.40 2.56 0.40 1659 30 18 5.88 5.41 0.92 1240 5.63 5.18 0.92 1302 5.40 4.97 0.92 1364 5.20 4.78 0.92 1426 30 20 6.13 4.90 0.80 1302 5.88 4.70 0.80 1380 5.70 4.56 0.80 1411 5.50 4.40 0.80 1473 30 22 6.38 4.34 0.68 1349 6.15 4.18 0.68 1434 6.00 4.08 0.68 1473 5.75 3.91 0.68 1535 30 24 6.70 3.75 0.56 1411 6.45 3.61 0.56 1488 6.30 3.53 0.56 1535 6.10 3.42 0.56 1612 30 26 6.90 3.04 0.44 1488 6.70 2.95 0.44 1566 6.60 2.90 0.44 1612 6.40 2.82 0.44 1659 31 18 5.88 5.64 0.96 1240 5.63 5.40 0.96 1302 5.40 5.18 0.96 1364 5.20 4.99 0.96 1426 31 20 6.13 5.15 0.84 1302 5.88 4.94 0.84 1380 5.70 4.79 0.84 1411 5.50 4.62 0.84 1473 31 22 6.38 4.59 0.72 1349 6.15 4.43 0.72 1434 6.00 4.32 0.72 1473 5.75 4.14 0.72 1535 31 24 6.70 4.02 0.60 1411 6.45 3.87 0.60 1488 6.30 3.78 0.60 1535 6.10 3.66 0.60 1612 31 26 6.90 3.31 0.48 1488 6.70 3.22 0.48 1566 6.60 3.17 0.48 1612 6.40 3.07 0.48 1659 32 18 5.88 5.88 1.00 1240 5.63 5.63 1.00 1302 5.40 5.40 1.00 1364 5.20 5.20 1.00 1426 32 20 6.13 5.39 0.88 1302 5.88 5.17 0.88 1380 5.70 5.02 0.88 1411 5.50 4.84 0.88 1473 32 22 6.38 4.85 0.76 1349 6.15 4.67 0.76 1434 6.00 4.56 0.76 1473 5.75 4.37 0.76 1535 32 24 6.70 4.29 0.64 1411 6.45 4.13 0.64 1488 6.30 4.03 0.64 1535 6.10 3.90 0.64 1612 32 26 6.90 3.59 0.52 1488 6.70 3.48 0.52 1566 6.60 3.43 0.52 1612 6.40 3.33 0.52 1659

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-AP50VG MUZ-AP50VGH

CAPACITY: 5.0 kW SHF: 0.74 INPUT: 1550 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

35 40 46

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 4.90 2.74 0.56 1519 4.50 2.52 0.56 1612 4.15 2.32 0.56 1674 21 20 5.15 2.27 0.44 1581 4.80 2.11 0.44 1659 4.45 1.96 0.44 1752 22 18 4.90 2.94 0.60 1519 4.50 2.70 0.60 1612 4.15 2.49 0.60 1674 22 20 5.15 2.47 0.48 1581 4.80 2.30 0.48 1659 4.45 2.14 0.48 1752 22 22 5.45 1.96 0.36 1643 5.10 1.84 0.36 1736 4.75 1.71 0.36 1798 23 18 4.90 3.14 0.64 1519 4.50 2.88 0.64 1612 4.15 2.66 0.64 1674 23 20 5.15 2.68 0.52 1581 4.80 2.50 0.52 1659 4.45 2.31 0.52 1752 23 22 5.45 2.18 0.40 1643 5.10 2.04 0.40 1736 4.75 1.90 0.40 1798 24 18 4.90 3.33 0.68 1519 4.50 3.06 0.68 1612 4.15 2.82 0.68 1674 24 20 5.15 2.88 0.56 1581 4.80 2.69 0.56 1659 4.45 2.49 0.56 1752 24 22 5.45 2.40 0.44 1643 5.10 2.24 0.44 1736 4.75 2.09 0.44 1798 24 24 5.75 1.84 0.32 1705 5.40 1.73 0.32 1783 5.10 1.63 0.32 1860 25 18 4.90 3.53 0.72 1519 4.50 3.24 0.72 1612 4.15 2.99 0.72 1674 25 20 5.15 3.09 0.60 1581 4.80 2.88 0.60 1659 4.45 2.67 0.60 1752 25 22 5.45 2.62 0.48 1643 5.10 2.45 0.48 1736 4.75 2.28 0.48 1798 25 24 5.75 2.07 0.36 1705 5.40 1.94 0.36 1783 5.10 1.84 0.36 1860 26 18 4.90 3.72 0.76 1519 4.50 3.42 0.76 1612 4.15 3.15 0.76 1674 26 20 5.15 3.30 0.64 1581 4.80 3.07 0.64 1659 4.45 2.85 0.64 1752 26 22 5.45 2.83 0.52 1643 5.10 2.65 0.52 1736 4.75 2.47 0.52 1798 26 24 5.75 2.30 0.40 1705 5.40 2.16 0.40 1783 5.10 2.04 0.40 1860 26 26 6.05 1.69 0.28 1767 5.70 1.60 0.28 1845 5.35 1.50 0.28 1922 27 18 4.90 3.92 0.80 1519 4.50 3.60 0.80 1612 4.15 3.32 0.80 1674 27 20 5.15 3.50 0.68 1581 4.80 3.26 0.68 1659 4.45 3.03 0.68 1752 27 22 5.45 3.05 0.56 1643 5.10 2.86 0.56 1736 4.75 2.66 0.56 1798 27 24 5.75 2.53 0.44 1705 5.40 2.38 0.44 1783 5.10 2.24 0.44 1860 27 26 6.05 1.94 0.32 1767 5.70 1.82 0.32 1845 5.35 1.71 0.32 1922 28 18 4.90 4.12 0.84 1519 4.50 3.78 0.84 1612 4.15 3.49 0.84 1674 28 20 5.15 3.71 0.72 1581 4.80 3.46 0.72 1659 4.45 3.20 0.72 1752 28 22 5.45 3.27 0.60 1643 5.10 3.06 0.60 1736 4.75 2.85 0.60 1798 28 24 5.75 2.76 0.48 1705 5.40 2.59 0.48 1783 5.10 2.45 0.48 1860 28 26 6.05 2.18 0.36 1767 5.70 2.05 0.36 1845 5.35 1.93 0.36 1922 29 18 4.90 4.31 0.88 1519 4.50 3.96 0.88 1612 4.15 3.65 0.88 1674 29 20 5.15 3.91 0.76 1581 4.80 3.65 0.76 1659 4.45 3.38 0.76 1752 29 22 5.45 3.49 0.64 1643 5.10 3.26 0.64 1736 4.75 3.04 0.64 1798 29 24 5.75 2.99 0.52 1705 5.40 2.81 0.52 1783 5.10 2.65 0.52 1860 29 26 6.05 2.42 0.40 1767 5.70 2.28 0.40 1845 5.35 2.14 0.40 1922 30 18 4.90 4.51 0.92 1519 4.50 4.14 0.92 1612 4.15 3.82 0.92 1674 30 20 5.15 4.12 0.80 1581 4.80 3.84 0.80 1659 4.45 3.56 0.80 1752 30 22 5.45 3.71 0.68 1643 5.10 3.47 0.68 1736 4.75 3.23 0.68 1798 30 24 5.75 3.22 0.56 1705 5.40 3.02 0.56 1783 5.10 2.86 0.56 1860 30 26 6.05 2.66 0.44 1767 5.70 2.51 0.44 1845 5.35 2.35 0.44 1922 31 18 4.90 4.70 0.96 1519 4.50 4.32 0.96 1612 4.15 3.98 0.96 1674 31 20 5.15 4.33 0.84 1581 4.80 4.03 0.84 1659 4.45 3.74 0.84 1752 31 22 5.45 3.92 0.72 1643 5.10 3.67 0.72 1736 4.75 3.42 0.72 1798 31 24 5.75 3.45 0.60 1705 5.40 3.24 0.60 1783 5.10 3.06 0.60 1860 31 26 6.05 2.90 0.48 1767 5.70 2.74 0.48 1845 5.35 2.57 0.48 1922 32 18 4.90 4.90 1.00 1519 4.50 4.50 1.00 1612 4.15 4.15 1.00 1674 32 20 5.15 4.53 0.88 1581 4.80 4.22 0.88 1659 4.45 3.92 0.88 1752 32 22 5.45 4.14 0.76 1643 5.10 3.88 0.76 1736 4.75 3.61 0.76 1798 32 24 5.75 3.68 0.64 1705 5.40 3.46 0.64 1783 5.10 3.26 0.64 1860 32 26 6.05 3.15 0.52 1767 5.70 2.96 0.52 1845 5.35 2.78 0.52 1922

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH789

PERFORMANCE DATA HEAT operation at Rated frequency

MUZ-AP25VG MUZ-AP25VGH

CAPACITY: 3.2 kW INPUT: 780 W

INDOOR

DB (°C)

OUTDOOR WB (°C)

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.02 507 2.43 608 2.85 686 3.26 741 3.68 788 4.06 811 4.48 827 21 1.92 546 2.30 647 2.72 718 3.10 772 3.52 811 3.90 835 4.30 866 26 1.73 585 2.14 686 2.53 757 2.94 811 3.36 850 3.74 874 4.16 897

MUZ-AP35VG MUZ-AP35VGH

CAPACITY: 4.0 kW INPUT: 1030 W

INDOOR

DB (°C)

OUTDOOR WB (°C)

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.52 670 3.04 803 3.56 906 4.08 979 4.60 1040 5.08 1071 5.60 1092 21 2.40 721 2.88 855 3.40 948 3.88 1020 4.40 1071 4.88 1102 5.38 1143 26 2.16 773 2.68 906 3.16 999 3.68 1071 4.20 1123 4.68 1154 5.20 1185

MUZ-AP42VG MUZ-AP42VGH

CAPACITY: 5.4 kW INPUT: 1490 W

INDOOR

DB (°C)

OUTDOOR WB (°C)

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 3.40 969 4.10 1162 4.81 1311 5.51 1416 6.21 1505 6.86 1550 7.56 1579 21 3.24 1043 3.89 1237 4.59 1371 5.24 1475 5.94 1550 6.59 1594 7.26 1654 26 2.92 1118 3.62 1311 4.27 1445 4.97 1550 5.67 1624 6.32 1669 7.02 1714

MUZ-AP50VG MUZ-AP50VGH

CAPACITY: 5.8 kW INPUT: 1600 W

INDOOR

DB (°C)

OUTDOOR WB (°C)

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 3.65 1040 4.41 1248 5.16 1408 5.92 1520 6.67 1616 7.37 1664 8.12 1696 21 3.48 1120 4.18 1328 4.93 1472 5.63 1584 6.38 1664 7.08 1712 7.80 1776 26 3.13 1200 3.89 1408 4.58 1552 5.34 1664 6.09 1744 6.79 1792 7.54 1840

NOTE: Q : Total capacity (kW) INPUT : Total power input (W) DB: Dry-bulb temperature WB: Wet-bulb temperature

OBH789

10-2. R.V. COIL CONTROL

Heating

. . . . . . . . . . . . . . . . .

Cooling

. . . . . . . . . . . . . . . . .

OFF

Dry

. . . . . . . . . . . . . . . . . . . .

OFF

NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.

OFF

Outdoor fan motor

Compressor

5 seconds 15 seconds

ON OFF

Compressor

Outdoor fan motor

R.V.coil

ON OFF

<COOL>

5 seconds

<HEAT>

5 seconds

10-1. OUTDOOR FAN MOTOR CONTROL

The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

10-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR

Sensor Purpose

Actuator

Compressor

LEV

Outdoor fan

motor

R.V. coil

Indoor fan

motor

Defrost

heater

Discharge temperature thermistor

Protection

○○

Indoor coil temperature thermistor

Cooling: Coil frost prevention

○

Heating: High pressure protection

○○

Defrost thermistor Heating: Defrosting

○○○○○

Fin temperature thermistor Protection

○○

Ambient temperature thermistor

Cooling: Low ambient temperature operation

○○○

Heating: Defrosting (Heater)

○

Outdoor heat exchanger temperature thermistor

Cooling: Low ambient temperature operation

○○○

Cooling: High pressure protection

○○○

ACTUATOR CONTROL

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP50VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH MUZ-AP50VGH

OBH789

SERVICE FUNCTIONS

11-1. CHANGE IN DEFROST SETTING Changing defrost finish temperature

<JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to 12-6-1.)

Jumper wire Defrost ﬁ nish temperature (°C)

Soldered (Initial setting) 5

None (Cut) 10

11-2. PRE-HEAT CONTROL SETTING

PRE-HEAT CONTROL

When moisture gets into the refrigerant cycle, it may interfere the start-up of the compressor at low outside temperature. The pre-heat control prevents this interference. The pre-heat control turns ON when the discharge temperature thermistor is 20°C or below. When the pre-heat control turns ON, the compressor is energized. (About 50 W)

Pre-heat control setting

<JK> ON: To activate the pre-heat control, cut the JK wire of the inverter P.C. board. OFF: To deactivate the pre-heat control, solder the JK wire of the inverter P.C. board. (Refer to 12-6.1)

NOTE: When the inverter P.C. board is replaced, check the jumper wires, and cut/solder them if necessary.

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP50VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH MUZ-AP50VGH

OBH789

12-1. CAUTIONS ON TROUBLESHOOTING

1. Before troubleshooting, check the following

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for miswiring.

2. Take care of the following during servicing

1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and then after confirming the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug.

2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board.

3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor.

4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.

5) When connecting or disconnecting the connectors, hold the connector housing. DO NOT pull the lead wires.

TROUBLESHOOTING

3. Troubleshooting procedure

1) Check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the OPERATION INDICATOR lamp is flashing on and off before starting ser-

vice work.

2) Before servicing, check that the connector and terminal are connected properly.

3) When the electronic control P.C. board seems to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration.

4) Refer to 12-2 and 12-3.

Lead wiring

Connector housing

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP50VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH MUZ-AP50VGH

OBH789

Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (12-3.) disappears, the memorized failure details can be recalled.

12-2. FAILURE MODE RECALL FUNCTION

1. Flow chart of failure mode recall function for the indoor/outdoor unit

NOTE: 1. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly.

2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: Either indoor or outdoor unit is abnormal. Beep is

emitted at the same timing as the blinking of the upper lamp on the indoor unit.

Indoor unit is normal. But the outdoor unit might be abnormal because there are some abnormalities that cannot be recalled with this way. Check if outdoor unit is abnormal according to the detailed outdoor unit failure mode recall function. (Refer to 12-2.2)

Yes

The cause of abnormality cannot be found because the abnormality does not recur.

Setting up the failure mode recall function

Turn ON the power supply. <Preparation of the remote controller>

While pressing OPERATION SELECT button and TEMP

button on the remote

controller at the same time, press RESET button.

First, release RESET button.

Hold down the other 2 buttons for another 3 seconds. Make sure that the indicators on

the LCD screen shown in the right ﬁ gure are all displayed. Then release the buttons.

Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit.

Judgment of indoor/outdoor abnormality

Before blinking, does the upper lamp on the indoor unit stay ON for 3 seconds? When it stays ON for 3 seconds (without beep):The outdoor unit is abnormal.

The indoor unit is abnormal. Check the blinking pattern, and identify the abnormal point by referring to the table of indoor unit failure mode recall function. (Refer to indoor unit service manual.) Make sure to check at least 2 consecutive blinking cycles.

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

The outdoor unit is abnormal. Check the blinking pattern, and identify the abnormal point by referring to the table of outdoor unit failure mode recall function. (Refer to 12-2.3) Make sure to check at least 2 consecutive blinking cycles.

Repair the failure parts.

Deleting the memorized abnormal condition

After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall

function" mentioned above.

Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is displayed)

with the remote controller headed towards the indoor unit. Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Operational procedure

Yes (Blinks)

No (OFF)

1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

2. Blinking pattern when the indoor unit is abnormal:

3.Blinking pattern when the outdoor unit is abnormal:

OFF

Beeps

Repeated cycle Repeated cycle

OFF

No beep Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5-

second interval

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Repeated cycle

Beeps

WEEKLY TIMER

MSZ-AP·VG(K)

OBH789

2. Flow chart of the detailed outdoor unit failure mode recall function

2.Blinking pattern when outdoor unit is abnormal:

OFF

No beep

Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5-

second interval

Repeated cycle

Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: The outdoor unit is abnormal. Beep is emitted

at the same timing as the blinking of the upper lamp on the indoor unit.

Yes (Blinks

)

No (OFF)

The outdoor unit might be abnormal. Check if outdoor unit is abnormal according to the following procedures.

Operational procedure

Make sure that the remote controller is set to the failure mode recall function.

With the remote controller headed towards the indoor unit, press TEMP

button to adjust the set temperature to 25°C. 1

1. Regardless of normal or abnormal condition, 2 short beeps are emitted as the signal is received.

The outdoor unit is abnormal. Check the blinking pattern, and identify the abnormal point by referring to the table of outdoor unit failure mode recall function (12-2.3.). Make sure to check at least 2 consecutive blinking cycles.

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

Repair the failure parts.

The outdoor unit is normal.

Release the failure mode recall function according to the left mentioned procedure.

Deleting the memorized abnormal condition

After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall

function" (12-2.1.).

Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is displayed) with

the remote controller headed towards the indoor unit.

Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.

Release the failure mode recall function according to "Releasing the failure mode recall function" men-

tioned above.

NOTE: 1. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly.

2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

The information regarding whether the

connected outdoor unit is a low-standby-

power model or a non-low-standby-power model will also be initialized.

(Default= compatible with a low-standby-

power model)

NOTE: It takes up to 1 minute to indicate the outdoor unit abnor-

mality.

Even if the upper lamp on the indoor unit is not lighting,

keep checking at least 1 minute or longer.

OBH789

3. Table of outdoor unit failure mode recall function

NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (12-3.).

Upper lamp

(Indoor unit)

Abnormal point

(Failure mode/protection)

LED indication

(Outdoor P.C. board)

Condition Remedy

Indoor/outdoor

unit failure

mode recall

function

Outdoor unit failure mode

recall function

OFF None (Normal) — — — — — 1-time ﬂ ash

2.5 seconds OFF

Indoor/outdoor communication, receiving error

—

Any signals from the inverter P.C. board cannot be received normally for 3 minutes.

•Refer to 12-5.

How to check miswiring and serial signal error.

○○

Indoor/outdoor communication, receiving error

—

Although the inverter P.C. board sends signal "0", signal "1" has been received 30 consecutive times.

•Refer to 12-5.

How to check miswiring and serial signal error.

2-time ﬂ ash

2.5 seconds OFF

Outdoor power system

—

Overcurrent protection cut-out operates 3 consecutive times within 1 minute after the compressor gets started.

•

Reconnect connectors.

•

Refer to 12-5.

"How to check inverter/ compressor".

•

Check stop valve.

○○

3-time ﬂ ash

2.5 seconds OFF

Discharge temperature thermistor

1-time ﬂ ash every

2.5 seconds

Thermistor shorts or opens during compressor running.

•

Refer to 12-5. "Check of outdoor thermistors". Defective outdoor thermistors can be identiﬁ ed by checking the blinking pattern of LED.

○○

Defrost thermistor Fin temperature thermistor 3-time ﬂ ash

2.5 seconds OFF P.C. board temperature thermistor

4-time ﬂ ash

2.5 seconds OFF Ambient temperature thermistor

2-time ﬂ ash

2.5 seconds OFF Outdoor heat exchanger temperature thermistor

—

4-time ﬂ ash

2.5 seconds OFF

Overcurrent 11-time ﬂ ash

2.5 seconds OFF

Large current ﬂ ows into power module (IC700).

•

Reconnect compressor connector.

•

Refer to 12-5.

"How to check inverter/ compressor".

•

Check stop valve.

—

○

Compressor synchronous abnormality (Compressor start-up failure protection)

12-time ﬂ ash

2.5 seconds OFF

Waveform of compressor current is distorted.

•

Reconnect compressor connector.

•

Refer to 12-5.

"How to check inverter/ compressor".

—

○

5-time ﬂ ash

2.5 seconds OFF

Discharge temperature

—

Temperature of discharge temperature thermistor exceeds 116°C, compressor stops. Compressor can restart if discharge temperature thermistor reads 100°C or less 3 minutes later.

•

Check refrigerant circuit and refrigerant amount.

•

Refer to 12-5.

"Check of LEV".

—

○

6-time ﬂ ash

2.5 seconds OFF

High pressure

—

Temperature of indoor coil thermistor exceeds 70°C in HEAT mode. Temperature of defrost thermistor exceeds 70°C in COOL mode.

•

Check refrigerant circuit and refrigerant amount.

•

Check stop valve.

—

○

7-time ﬂ ash

2.5 seconds OFF

Fin temperature/P.C. board temperature

7-time ﬂ ash

2.5 seconds OFF

Temperature of ﬁ n temperature thermistor on the inverter P.C. board exceeds 75 ~ 86°C, or temperature of P.C. board temperature thermistor on the inverter P.C. board exceeds 72 ~ 85°C.

•

Check around outdoor unit.

•

Check outdoor unit air passage.

•

Refer to 12-5.

"Check of outdoor fan motor".

—

○

8-time ﬂ ash

2.5 seconds OFF

Outdoor fan motor

—

Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan startup.

•

Refer to 12-5. "Check of outdoor fan motor". Refer to 12-5.

"Check of inverter P.C. board".

—

○

9-time ﬂ ash

2.5 seconds OFF

Nonvolatile memory data 5-time ﬂ ash

2.5 seconds OFF

Nonvolatile memory data cannot be read properly.

•

Replace the inverter P.C. board.

○○

Power module (IC700) 6-time ﬂ ash

2.5 seconds OFF

The interface short circuit occurs in the output of the power module (IC700). The compressor winding shorts circuit.

•

Refer to 12-5. "How to check inverter/ compressor".

OBH789

NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (12-3.).

Upper lamp (Indoor unit)

Abnormal point

(Failure mode/protection)

LED indication

(Outdoor P.C. board)

Condition Remedy

Indoor/outdoor

unit failure

mode recall

function

Outdoor unit failure mode

recall function

10-time ﬂ ash

2.5 seconds OFF

Discharge temperature

—

Temperature of discharge temperature thermistor has been 50°C or less for 20 minutes.

•

Refer to 12-5.

"Check

of LEV".

•

Check refrigerant circuit and refrigerant amount.

—

○

11-time ﬂ ash

2.5 seconds OFF

Bus-bar voltage (DC) 8-time ﬂ ash

2.5 seconds OFF

Bus-bar voltage of inverter cannot be detected normally.

•

Refer to 12-5. "How to check inverter/ compressor".

—

○

Each phase current of compressor

9-time ﬂ ash

2.5 seconds OFF

Each phase current of compressor

cannot be detected normally. 14-time ﬂ ash or more

2.5 seconds OFF

Stop valve (Closed valve) 14-time ﬂ ash

2.5 seconds OFF

Closed valve is detected by

compressor current.

•

Check stop valve.

○○

4-way valve/ Pipe temperature

16-time ﬂ ash

2.5 seconds OFF

The 4-way valve does not work

properly.

The indoor coil thermistor detects an

abnormal temperature.

•

Check the 4-way valve.

•

Replace the inverter

P.C. board. Outdoor refrigerant system abnormality

1-time ﬂ ash

2.5 seconds OFF

A closed valve and air trapped in the refrigerant circuit are detected based on the temperature sensed by the indoor and outdoor thermistors and the current of the compressor.

•

Check for a gas leak

in a connecting piping

etc.

•

Check the stop valve.

•

Refer to 12-5.

“Check of outdoor

refrigerant circuit”.

○○

OBH789

12-3. TROUBLESHOOTING CHECK TABLE

No. Symptom LED indication

Abnormal point/ Con-

dition

Condition Remedy

Outdoor unit does not operate.

1-time ﬂ ash every

2.5 seconds

Outdoor power system

Overcurrent protection cut-out operates 3 consecutive times within 1 minute after the compressor gets started.

•

Reconnect connector of compressor.

•

Refer to 12-5.

"How to check

inverter/compressor".

•

Check stop valve.

Outdoor thermistors Discharge temperature thermistor, ﬁ n temperature thermistor,

defrost thermistor, P.C. board temperature thermistor, outdoor heat exchanger temperature thermistor or ambient temperature thermistor shorts or opens during compressor running.

•

Refer to 12-5.

"Check of outdoor

thermistors".

Outdoor control system

Nonvolatile memory data cannot be read properly. (Upper lamp of OPERATION INDICATOR lamp on the indoor unit lights up or ﬂ ashes 7-time.)

•

Replace inverter P.C. board.

6-time ﬂ ash

2.5 seconds OFF

Serial signal The communication fails between the indoor and outdoor unit

for 3 minutes.

•

Refer to 12-5.

"How to check

miswiring and serial signal error.

11-time ﬂ ash

2.5 seconds OFF

Stop valve/ Closed valve

Closed valve is detected by compressor current.

•

Check stop valve.

14-time ﬂ ash

2.5 seconds OFF

Outdoor unit (Other abnormality)

Outdoor unit is defective.

•

Refer to 12-2.2. "Flow chart of the detailed outdoor unit failure mode recall function".

16-time ﬂ ash

2.5 seconds OFF

4-way valve/

Pipe temperature

The 4-way valve does not work properly. The indoor coil thermistor detects an abnormal temperature.

•

Refer to 12-5.

"Check of R.V.

coil".

•

Replace the inverter P.C. board.

17-time ﬂ ash

2.5 seconds OFF

Outdoor refrigerant system abnormality

A closed valve and air trapped in the refrigerant circuit are detected based on the temperature sensed by the indoor and outdoor thermistors and the current of the compressor.

•

Check for a gas leak in a connecting piping etc.

•

Check the stop valve.

•

Refer to 12-5.

“Check of outdoor

refrigerant circuit”.

'Outdoor unit stops and restarts 3 minutes later' is repeated.

2-time ﬂ ash

2.5 seconds OFF

Overcurrent protection

Large current ﬂ ows into power module (IC700).

•

Reconnect connector of compressor.

•

Refer to 12-5. "How to check inverter/compressor".

•

Check stop valve.

3-time ﬂ ash

2.5 seconds OFF

Discharge temperature overheat protection

Temperature of discharge temperature thermistor exceeds 116°C, compressor stops. Compressor can restart if discharge temperature thermistor reads 100°C or less 3 minutes later.

•

Check refrigerant circuit and refrigerant amount.

•

Refer to 12-5.

"Check of LEV".

4-time ﬂ ash

2.5 seconds OFF

Fin temperature / P.C. board temperature thermistor overheat protection

Temperature of ﬁ n temperature thermistor on the heat sink exceeds 75 ~ 86°C or temperature of P.C. board temperature thermistor on the inverter P.C. board exceeds 72 ~ 85°C.

•

Check around outdoor unit.

•

Check outdoor unit air passage.

•

Refer to 12-5.

"Check of outdoor

fan motor".

5-time ﬂ ash

2.5 seconds OFF

High pressure protection

Indoor coil thermistor exceeds 70°C in HEAT mode. Defrost thermistor exceeds 70°C in COOL mode.

•

Check refrigerant circuit and refrigerant amount.

•

Check stop valve.

8-time ﬂ ash

2.5 seconds OFF

Compressor synchronous abnormality

The waveform of compressor current is distorted.

•

Reconnect connector of compressor.

•

Refer to 12-5. "How to check inverter/compressor".

10-time ﬂ ash

2.5 seconds OFF

Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds

after outdoor fan start-up.

•

Refer to 12-5.

"Check of outdoor

fan motor.

•

Refer to 12-5.

"Check of inverter

P.C. board.

12-time ﬂ ash

2.5 seconds OFF

Each phase current of compressor

Each phase current of compressor cannot be detected normally.

•

Refer to 12-5.

"How to check

inverter/compressor".

13-time ﬂ ash

2.5 seconds OFF

Bus-bar voltage (DC)

Bus-bar voltage of inverter cannot be detected normally.

•

It occurs with following case. Instantaneous power voltage drop. (Short time power failure) (AP50)

•

Refer to 12-5.

"Check of power

supply". (AP50)

•

Refer to 12-5.

"How to check in-

verter/compressor".

Outdoor unit operates.

1-time ﬂ ash

2.5 seconds OFF

Frequency drop by current protection

When the input current exceeds approximately 10A, compressor frequency lowers.

The unit is normal, but check the following.

•

Check if indoor ﬁ lters are clogged.

•

Check if refrigerant is short.

•

Check if indoor/outdoor unit air circulation is short cycled.

3-time ﬂ ash

2.5 seconds OFF

Frequency drop by high pressure protection

Temperature of indoor coil thermistor exceeds 55°C in HEAT mode, compressor frequency lowers.

Frequency drop by defrosting in COOL mode

Indoor coil thermistor reads 8°C or less in COOL mode, compressor frequency lowers.

4-time ﬂ ash

2.5 seconds OFF

Frequency drop by discharge temperature protection

Temperature of discharge temperature thermistor exceeds 111°C, compressor frequency lowers.

•

Check refrigerant circuit and refrigerant amount.

•

Refer to 12-5.

"Check of LEV".

•

Refer to 12-5.

"Check of outdoor

thermistors".

MUZ-

AP25/35/42

5-time ﬂ ash

2.5 seconds OFF

Outside temperature thermistor protection

When the outside temperature thermistor shorts or opens, protective operation without that thermistor is performed.

•

Refer to 12-5.

Check of outdoor

thermistors.

OBH789

No. Symptom LED indication

Abnormal point/ Con-

dition

Condition Remedy

Outdoor unit operates.

7-time ﬂ ash

2.5 seconds OFF

Low discharge temperature protection

Temperature of discharge temperature thermistor has been 50°C or less for 20 minutes.

•

Refer to 12-5.

"Check of LEV".

•

Check refrigerant circuit and refrigerant amount.

8-time ﬂ ash

2.5 seconds OFF

PAM protection PAM: Pulse Amplitude Modulation

The overcurrent ﬂ ows into PFC (Power factor correction: IC820) or the bus-bar voltage reaches 394 V or more, PAM stops and restarts.

This is not malfunction. PAM protection will be activated in the following cases:

1 Instantaneous power voltage

drop. (Short time power failure)

2 When the power supply voltage

is high.

9-time ﬂ ash

2.5 seconds OFF

Inverter check mode The connector of compressor is disconnected, inverter check

mode starts.

•

Check if the connector of the compressor is correctly connected. Refer to 12-5.

"How to check

inverter/compressor".

NOTE: 1. The location of LED is illustrated at the right ﬁ gure. Refer to 12-6.1.

2. LED is lighted during normal operation. The ﬂ ashing frequency shows the number of times the LED blinks after every 2.5-second OFF.

(Example) When the ﬂ ashing frequency is “2”.

ON OFF

2.5-second OFF

0.5-second ON

LED

Flashing →

Inverter P.C. board

OBH789

12-4. TROUBLE CRITERION OF MAIN PARTS

Part name Check method and criterion Figure

Defrost thermistor (RT61) Fin temperature

thermistor (RT64) Ambient temperature

thermistor (RT65) Outdoor heat exchanger

temperature thermistor (RT68)

Measure the resistance with a tester. Refer to 12-6. “Test point diagram and voltage”, 1. “Inverter P.C.

board”, for the chart of thermistor.

Discharge temperature thermistor (RT62)

Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up.

Refer to 12-6. “Test point diagram and voltage”, 1. “Inverter P.C. board”, for the chart of thermistor.

Compressor

Measure the resistance between terminals using a tester. (Temperature: -10 ~ 40°C)

Normal (Ω)

MUZ-AP25/35VG(H) MUZ-AP42/50VG(H)

U-V U-W V-W

1.59 ~ 2.16 0.82 ~ 1.11

WHT

RED BLK

Outdoor fan motor

Measure the resistance between lead wires using a tester. (Temperature: -10 ~ 40°C)

Color of lead wire

Normal (Ω)

MUZ-AP25/35/42VG(H) MUZ-AP50VG(H)

RED – BLK BLK – WHT

WHT – RED

32 ~ 43 15 ~ 20

WHT

RED BLK

R. V. coil (21S4)

Measure the resistance using a tester. (Temperature: -10 ~ 40°C)

Normal (kΩ)

1.41 ~ 2.00

Expansion valve coil (LEV)

Measure the resistance using a tester. (Temperature: -10 ~ 40°C)

Color of lead wire Normal (Ω)

RED – ORN

37 ~ 54

RED – WHT

RED – BLU

RED – YLW

RED

(+12V)

YLW

BLU

WHT

ORN

LEV

Defrost heater

MUZ-AP•VGH

Normal (Ω)

MUZ-AP25/35/42VGH MUZ-AP50VGH

802 ~ 980 370 ~ 428

OBH789

12-5. TROUBLESHOOTING FLOW

A How to check inverter/compressor

Refer to 12-5. “Check of compressor operation time”. Does the compressor operate continuously?

Refer to 12-5. “Check of compressor start failure”.

Yes

Refer to 12-5. “Check of compressor winding”. Is the compressor normal?

Replace the compressor.

Yes

B Check of open phase

C Check of compressor

● With the connector between the compressor and the power module (IC700) disconnected, activate the inverter and check if the inverter is normal by measuring the voltage balance between the terminals.

Output voltage is 50 - 130 V. (The voltage may differ according to the tester.) << Operation method>>

Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit. (TEST RUN OPERA-

TION: Refer to 9-3.) <<Measurement point>> At 3 points BLK (U)-WHT (V) BLK (U)-RED (W) WHT(V)-RED (W)

NOTE: 1. Output voltage varies according to power supply voltage.

2. Measure the voltage by analog type tester.

3. During this check, LED of the inverter P.C. board ﬂ ashes 9 times. (Refer to 12-6.1.)

Measure AC voltage between the lead wires at 3 points.

Are the voltages balanced?

Disconnect the connector between the compressor and the power module (IC700).

Replace the inverter P.C. board.

Check the voltage between terminals.

Check the compressor.

See 12-5. “Check of compressor”.

Yes

See 12-5. “Check of open phase”.

OBH789

F Check of compressor start failure

D Check of compressor winding

E Check of compressor operation time

● Disconnect the connector between the compressor and the power module (IC700), and measure the resistance between the compressor terminals.

<<Measurement point>> At 3 points BLK-WHT BLK-RED WHT-RED <<Judgement>> Refer to 12-4. 0 [Ω] ················Abnormal [short] Infinite [Ω] ·······Abnormal [open] NOTE: Be sure to zero the ohmmeter before measurement.

Measure the resistance between the lead wires at 3 points.

1 Heat the compressor with a drier for about 20 minutes. Do not recover refrigerant gas while heating.

Heating part

● Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to overcurrent. <<Operation method>> Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit. (TEST RUN OPERATION: Refer to 9-3.) <<Measurement>> Measure the time from the start of compressor to the stop of compressor due to overcurrent.

Compressor starts Abnormal

(IC700 failure) (Compressor winding short)

Abnormal (Compressor lock out) (Starting defect)

Abnormal (Poor contact) (Inverter P.C. board defect) (Disconnected connector)

Abnormal (Refrigerant circuit defect) (Closed valve)

Normal

0 second 1 second

2 seconds

10 seconds

10 minutes

<<Judgement>>

After the compressor is heated with a drier, does the compressor start?

Replace the compressor.

Compressor start failure. Activate pre-heat control. (Refer to 11-2. "PRE-HEAT CONTROL SETTING")

Yes

Does the compressor run for 10 seconds or more after it starts?

Check the refrigerant circuit. Check the stop valve.

Yes

Conﬁ rm that ~ is normal.

•Electrical circuit check . Contact of the compressor connector . Output voltage of inverter P.C. board and balance of them (See 12-5. ) . Direct current voltage between DB61(+) and (-) on the inverter P.C. board . Voltage between outdoor terminal block S1-S2

OBH789

G Check of outdoor thermistors

Replace the thermistor except RT64. When RT64 is abnormal, replace the inverter P.C. board.

Replace the inverter P.C. board.

Is the resistance of thermistor normal? (Refer to 12-6.1.)

Reconnect the connector of thermistor. Turn ON the power supply and press EMERGENCY OPERATION switch.

Does the unit operate for 10 minutes or more without showing thermistor abnormality?

OK (Cause is poor contact.)

Yes

Disconnect the connector of thermistor in the inverter P.C. board (see below table), and measure the resistance of thermistor.

Thermistor Symbol Connector, Pin No. Board

Defrost RT61 Between CN641 pin1 and pin2

Inverter P.C. board

Discharge temperature RT62 Between CN641 pin3 and pin4 Fin temperature RT64 Between CN642 pin1 and pin2 Ambient temperature RT65 Between CN643 pin1 and pin2 Outdoor heat exchanger temperature RT68 Between CN644 pin1 and pin3

OBH789

H Check of R.V. coil

First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 12-4. In case CN721 is disconnected or R.V. coil is open, voltage is generated between the terminal pins of the connector

although no signal is being transmitted to R.V. coil.

Check if CN721 is connected.

Is there 230 V AC between CN721 and

on the inverter P.C. board 3 minutes

after the power supply is turned ON?

Yes

Replace the inverter P.C. board.

Replace the 4-way valve.

Unit operates COOL mode even if it is set to HEAT mode.

Is there 230 V AC between CN721 and

on the inverter P.C. board 3 minutes

after the power supply is turned ON?

Yes

Replace the inverter P.C. board.

Replace the 4-way valve.

Unit operates HEAT mode even if it is set to COOL mode.

Disconnect connector between the compressor and the IGBT module (IC700). Turn ON the power supply and press EMERGENCY OPERATION switch twice (HEAT mode).

Disconnect connector between the compressor and the IGBT module (IC700). Turn ON the power supply and press EMERGENCY OPERATION switch once (COOL mode).

OBH789

I Check of outdoor fan motor

Is the resistance between each terminal of outdoor fan motor normal? (Refer to 12-4.)

Disconnect CN932 from the inverter P.C. board, and turn on the power supply.

Rotate the outdoor fan motor manually and measure the voltage of CN931. Between 1(+) and 5(-) Between 2(+) and 5(-) Between 3(+) and 5(-)

Does the voltage between each terminal become 5 and 0 V DC repeatedly?

Does the outdoor fan motor rotate smoothly?

Replace the outdoor fan motor.

Replace the inverter P.C. board.

Yes

(Fixed to either 5 or 0 V DC)

Yes

Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Check the connection between the connector CN931 and CN932.

OBH789

J Check of power supply

Is there voltage 230 V AC between the indoor terminal block S1 and S2?

Yes

Replace the indoor electronic control P.C. board.

Rectify indoor/outdoor connecting wire.

Yes

If lights up, OK. If ﬂ ashes, refer to 12-3.

Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit light up?

Does LED on the inverter P.C. board light up or ﬂ ash? (Refer to 12-6.1.)

Replace the inverter P.C. board.

Is there bus-bar voltage 260 - 370 V DC between DB61 (+) and DB61 (–) on the inverter P.C. board? (Refer to 12-6.1.)

Check the electric parts in main circuit.

Yes

Disconnect the connector between the compressor and the

power module (IC700). Turn ON power supply and press EMERGENCY OPERATION switch.

Inverter P.C. board (Solder side)

DB61

260 - 370 V DC

OBH789

Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. 1

Expansion valve operates in full-opening direction.

NOTE: After check of LEV, do the undermentioned operations.

1. Turn OFF the power supply and turn it ON again.

2. Press RESET button on the remote controller.

1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

Measure each voltage between connector pins of CN724 on the inverter P.C. board.

1. Pin (-) — Pin (+)

2. Pin (-) — Pin (+)

3. Pin (-) — Pin (+)

4. Pin (-) — Pin (+) Is there about 3 - 5 V AC between each?

NOTE: Measure the voltage by an analog

tester.

Properly ﬁ x the LEV coil to the expansion valve.

Replace the inverter P.C. board.

Replace the LEV coil.

Replace the expansion valve.

Is LEV coil properly ﬁ xed to the expansion valve?

Does the resistance of LEV coil have the characteristics? (Refer to 12-4.)

Do you hear the expansion valve "click, click·······"? Do you feel the expansion valve vibrate when touching it ?

Turn ON the power supply. <Preparation of the remote controller>

While pressing both OPERATION SELECT button and TEMP button on the remote controller at the same time, press RESET button. First, release RESET button.

Hold down the other 2 buttons for another 3 seconds.

Make sure that the indicators on the LCD screen shown in the right ﬁ gure are all displayed. Then re- lease the buttons.

Yes

K Check of LEV (Expansion valve)

WEEKLY TIMER

MSZ-AP·VG(K)

OBH789

Check the outdoor fan motor. (Refer to 12-5. .)

Is the fuse (F901) blown on the inverter P.C. board?

Check the connection of the connectors (CN931, CN932) of the outdoor fan motor. If the connection is poor, make it correct.

Operate the outdoor unit by starting EMERGENCY OPERATION.

Check the LED indication on the inverter P.C. board. Does the LED ﬂ ash 10 times?

Replace the inverter P.C. board.

Check the corresponding parts following LED indication. (Refer to 12-3.)

Yes

Yes (10-time ﬂ ash)

L Check of inverter P.C. board

OBH789

M How to check miswiring and serial signal error

• Turn OFF inverter-controlled lighting equipment.

• Turn OFF the power supply and then turn ON again.

• Press EMERGENCY OPERATION switch.

Is serial signal error indicated 6 minutes later?

Yes

• Reinstall either the unit or the light away from each other.

• Attach a ﬁ lter on remote control receiving section of the indoor unit.

Turn the main power supply OFF.

Is there rated voltage in the power supply?

Yes

Check for incorrect indoor-outdoor connecting wiring.

Check the power supply.

Is there rated voltage between outdoor terminal block S1 and S2?

Yes

Check for miswiring, broken wires, and loose wire connection between the main power supply and outdoor terminal block S1 and between the main power supply and outdoor terminal block S2.

Wait for 2 or more minutes after the main power supply is turned on. Touch S2 and S3 with tester probes and start the emergency operation.

When the emergency operation starts, does the rated voltage occur for 2 seconds between indoor terminal block S2 and S3?

Yes

Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit blink continuously 6 minutes after the emergency operation starts?

Does the outdoor LED light up?

Replace the indoor electronic control P.C. board.

Yes

Does the outdoor LED blink 6 times?

Yes

Conﬁ rm that the thermostat is OFF and wiring is not loose.

Does DC (6V or more) occur between indoor terminal block S2 and S3?

Yes

Replace the outdoor inverter P.C. board. 1

Replace the indoor electronic control P.C. board.

1. Electric charge may remain immediately after the main power supply is turned OFF. Perform the procedure after 3 minutes.

Replace the outdoor inverter P.C. board. 1

Yes

Turn the main power supply ON.

Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)?

The connection information to the Multi series is stored in the indoor unit. Refer to “Deleting the memorized abnormal condition” described in 12-2.1 to clear the error history. When the error history is being cleared, the connection information also will be initialized. The indoor unit will be compatible with a low-standby-power model after initialization.

Yes

OBH789

N Check of the outdoor refrigerant circuit

Has the operation stopped during pump down?

Was the operation started with the stop valve closed, and was it opened during operation?

Yes

The operation has stopped to prevent the diesel explosion caused by air trapped in the refrigerant circuit. Close the stop valve, and disconnect the power plug or turn the breaker OFF.

The unit occasionally stops when the stop valve is opened or closed during operation. Open the stop valve and start the cooling operation again.

Yes

The refrigerant gas amount may be 60% or less than the normal amount. Identify where the gas is leaking from, and ﬁ x the leak.

CAUTION : Do not start the operation again to prevent hazards.

OBH789

O Electromagnetic noise enters into TV sets or radios

Yes

Is the unit earthed?

Earth the unit.

Yes

Is the distance between the antennas and the indoor unit within 3 m, or is the distance between the antennas and the outdoor unit within 3 m?

Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.

Is the distance between the TV sets or radios and the indoor unit within 1 m, or is the distance between the TV sets or radios and the outdoor unit within 3 m?

Yes

Extend the distance between the TV sets and/ or radios and the indoor unit, or the TV sets or radios and the outdoor unit.

Are the antennas damaged? Is the coaxial cable damaged? Is there any poor contact in the antenna wiring?

Yes

Replace or repair the antenna. Replace or repair the coaxial cable.

Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas close?

Yes

Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas.

Even if all of the above conditions are fulﬁ lled, the electromagnetic noise may enter, depending on the electric ﬁ eld strength or the installation condition (combination of speciﬁ c conditions such as antennas or wiring). Check the following before asking for service.

1. Devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave)

2. Channel, frequency, broadcast station affected by the electromagnetic noise

3. Channel, frequency, broadcast station unaffected by the electromagnetic noise

4. Layout of: indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, earth wire, antennas, wiring from antennas, receiver

5. Electric ﬁ eld intensity of the broadcast station affected by the electromagnetic noise

6. Presence or absence of ampliﬁ er such as booster

7. Operation condition of air conditioner when the electromagnetic noise enters in

1) Turn OFF the power supply once, and then turn ON the power supply. In this situation, check for the electromagnetic noise.

2) Within 3 minutes after turning ON the power supply, press STOP/OPERATE (OFF/ON) button on the remote controller for power ON, and check for the electromagnetic noise.

3) After a short time (3 minutes later after turning ON), the outdoor unit starts running. During operation, check for the electromagnetic noise.

4) Press STOP/OPERATE (OFF/ON) button on the remote controller for power OFF, when the outdoor unit stops but the indoor/outdoor communication still runs on. In this situation, check for the electromagnetic noise.

OBH789

-20 -10 0 10 20 30 40

100

Temperature( )

Defrost thermistor(RT61) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68)

0 1020304050607080

100

120

140

160

180

200

Temperature( )

Fin temperature thermistor(RT64)

Resistance(k )

Temperature (°C)

Discharge temperature thermistor (RT62)

5HVLVWDQFHN

100

200

300

400

500

600

700

800

0 102030405060708090100110120

1. Inverter P.C. board

12-6. TEST POINT DIAGRAM AND VOLTAGE

Fin temperature

thermistor/RT64

(CN642)

Ambient temperature

thermistor/RT65

(CN643)

Discharge temperature

thermistor/RT62

(CN641)

Defrost thermistor

/RT61(CN641)

DB61 260 - 370 V DC

Front side of unit

230 V AC

Output to drive compressor (LDU, LDV, LDW)

(+)

(-)

Fuse (F701) T3.15AL250V

R.V.coil (CN721) 230 V AC

Jumper wire for changing defrost setting (JS)

Signal of outdoor

fan motor (CN931)

230 V AC

Outdoor heat exchanger

temperature thermistor

/RT68 (CN644)

Jumper wire for pre-heat control setting (JK)

Fuse (F801) T3.15AL250V

Back side of unit

LEV (CN724)

Output to drive outdoor fan motor (CN932)

LED

MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP50VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH MUZ-AP50VGH

Defrost heater (CN722) (MUZ-AP•VGH)

Fuse (F62) 15 A 250 V

Fuse (F901) T3.15AL250V

Smoothing capacitor (C63)

Smoothing capacitor (C62)

Smoothing capacitor (C61)

(MUZ-AP42/50)

Fuse (F61) 25 A 250V

OBH789

13-1. MUZ-AP25VG MUZ-AP35VG MUZ-AP42VG MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH

NOTE: Turn OFF the power supply before disassembly.

Photos: MUZ-AP42VGH

OPERATING PROCEDURE PHOTOS

1. Removing the cabinet

(1) Remove the screw fixing the service panel. (2) Pull down the service panel and remove it. (3) Disconnect the power supply cord and indoor/outdoor

connecting wire. (4) Remove the screws fixing the top panel. (5) Remove the top panel. (6) Remove the screws fixing the cabinet. (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel.

Photo 1

Photo 2

(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector shown below has the

locking mechanism.

Slide the sleeve. Pull the terminal while pushing the locking lever.

Hold the sleeve, and pull out the terminal slowly.

Connector

Sleeve

Locking lever

Back panel

Service

panel

Screws of the cabinet

Screws of the

top panel

The terminal which has the locking mechanism can be detached as shown below. There are following 2 types of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.

DISASSEMBLY INSTRUCTIONS

Screw of the cabinet

Screws of the back panel

Screws of the terminal block support and the back panel

Screws of the service panel

Direction to remove

Hooks

Screws of the top panel

Screws of the cabinet

OBH789

OPERATING PROCEDURE

PHOTOS

2. Removing the inverter assembly, inverter P.C. board

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the following con-

nectors:

CN721 (R.V. coil) CN722 (Defrost heater)(MUZ-AP•VGH) CN931, CN932 (Fan motor) CN641 (Defrost thermistor and discharge temperature ther-

mistor)

CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor)

CN724 (LEV) (3) Remove the compressor connector (CN61). (4) Remove the screws fixing the heat sink support and the sep-

arator. (5) Remove the fixing screws of the terminal block support and

the back panel. (6) Remove the inverter assembly. (7) Remove the screw of the earth wire and screw of the termi-

nal block support. (8) Remove the heat sink support from the P.C. board support. (9) Remove the screw of the inverter P.C. board and remove the

inverter P.C. board from the P.C. board support.

Photo 3

Photo 4 (Inverter assembly)

Photo 5

3. Removing R.V. coil

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board>

CN721 (R.V. coil) (3) Remove the R.V. coil.

4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the following con-

nectors: <Inverter P.C. board> CN641 (Defrost thermistor and discharge temperature ther-

mistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor)

(3) Pull out the discharge temperature thermistor from its holder. (4) Pull out the defrost thermistor from its holder. (Photo 6) (5) Pull out the outdoor heat exchanger temperature thermistor

from its holder. (Photo 6)

(6) Pull out the ambient temperature thermistor from its holder.

Discharge temperature thermistor

Screw of the R.V. coil

Screws of the heat sink support and the separator

Screws of the terminal block support and the back panel

Heat sink

Screw of the earth wire

Screw of the Terminal block support

Screw of the inverter P.C. board

Heat sink support

P.C. board support

Terminal block support

OBH789

OPERATING PROCEDURE

PHOTOS

5. Removing outdoor fan motor

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board>

CN931, CN932 (Fan motor) (3) Remove the propeller fan nut. (4) Remove the propeller fan. (5) Remove the screws fixing the fan motor. (6) Remove the fan motor.

Photo 6

NOTE: MUZ-AP25/35VG/H are different in the installa-

tion position of thermistors.

Photo 7

6. Removing the compressor and 4-way valve

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Remove the inverter assembly. (Refer to section 2.) (3) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge

shows 0 kg/cm2 (0 MPa).

(4) Detach the brazed part of the suction and the discharge pipe

connected with compressor. (5) Remove the nuts of compressor legs. (6) Remove the compressor. (7) Detach the brazed part of pipes connected with 4-way valve.

7. Removing the LEV assembly

(1) Detaching the brazed part of pipes connected with LEV

valve.

Photo 8

Defrost thermistor

Outdoor heat exchanger temperature thermistor

Brazed parts of 4-way valve

Ambient temperature thermistor

Brazed parts of LEV valve

Propeller fan nut

Screws of the outdoor fan motor

Propeller fan

OBH789

13-2. MUZ-AP50VG MUZ-AP50VGH

NOTE: Turn OFF the power supply before disassembly.

OPERATING PROCEDURE

PHOTOS

1. Removing the cabinet

(1) Remove the screws of the service panel. (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover. (4) Remove the service panel. (5) Remove the top panel. (6) Remove the valve cover. (7) Disconnect the power supply and indoor/outdoor connect-

ing wire. (8) Remove the screws of the cabinet. (9) Remove the cabinet. (10)

Remove the screws of the back panel.

(11)

Remove the back panel.

Photo 2

Photo 1

Screws of the cabinet

Screws of the top panel

Screws of the cabinet

Screws of the top panel

Screw of the back panel

Screws of the service panel

Screw of the valve cover

Screws of the cabinet

Screws of the back panel

OBH789

OPERATING PROCEDURE PHOTOS

2. Removing the inverter assembly and inverter P.C. board

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the following con-

nectors:

CN721 (R.V. coil) CN722 (Defrost heater)(MUZ-AP50VGH) CN931, CN932 (Fan motor) CN641 (Defrost thermistor and discharge temperature ther-

mistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor) CN724 (LEV)

(3) Remove the compressor connector (CN61). (4) Remove the screws fixing the heat sink support and the sep-

arator.

(5)

Remove the fixing screw of the P.B. support and the separator.

(6) Remove the fixing screws of the terminal block support and

the back panel.

(7) Remove the inverter assembly. (8) Remove the heat sink support from the P.C. board support. (9) Remove the screw of the inverter P.C. board and remove the

inverter P.C. board from the P.C. board support.

Connection procedure when attaching the inverter P.C.

board (Photo 4)

1. Connect the lead wires of the heat exchanger temperature thermistor, the defrost thermistor and discharge temperature thermistor to the connector on the inverter P.C. board. Pull the lead wires toward you and put them on the right hook on the P.C. board support.

2. Connect the lead wires of the LEV to the connector on the inverter P.C. board. Pull the lead wires toward you and put them on the right hook on the P.C. board support.

3. Connect the lead wires of the ambient temperature thermistor to the connector on the inverter P.C. board. Pull the lead wires toward you and put them on the left hook on the P.C. board support so that the fan motor lead wires are bundled up as shown in Photo 4.

Photo 3

Photo 4

Photo 5 (Inverter assembly)

Screw of the heat sink

support and the separator

Screws of the terminal block support and the back panel

Screw of the P.B. support and the separator

Heat sink

Screws of the earth wire

Screw of the inverter P.C. board

Heat sink support

P.C. board support

Inverter P.C. board

Lead wires of the LEV

Lead wires of the heat exchanger temperature and discharge temperature thermistor

Inverter P.C. board support

Lead wires of the ambient temperature thermistor

OBH789

OPERATING PROCEDURE

PHOTOS

3. Removing R. V. coil

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board>

CN721 (R.V. coil)

(3) Remove the R.V. coil.

Photo 6

Photo 7

4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the following con-

nectors: <Inverter P.C. board> CN641 (Defrost thermistor and discharge temperature ther-

mistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor)

(3) Pull out the discharge temperature thermistor from its holder. (4) Pull out the defrost thermistor from its holder. (5) Pull out the outdoor heat exchanger temperature thermistor

from its holder.

(6) Pull out the ambient temperature thermistor from its holder.

5. Removing outdoor fan motor

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board>

CN931, CN932 (Fan motor)

(3) Remove the propeller fan nut. (4) Remove the propeller fan. (5) Remove the screws fixing the fan motor. (6) Remove the fan motor.

Photo 8

Discharge temperature thermistor

Screw of the R.V. coil

Defrost thermistor

Outdoor heat exchanger temperature thermistor

Ambient temperature thermistor

Screws of the outdoor fan motor

Propeller fan

Propeller fan nut

OBH789

OPERATING PROCEDURE

PHOTOS

6. Removing the compressor and 4-way valve

(1) Remove the cabinet and panels. (Refer to section 1.) (2) Remove the inverter assembly. (Refer to section 2.) (3) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge

shows 0 kg/cm2 (0 MPa).

(4) Detach the brazed part of the suction and the discharge pipe

connected with compressor. (5) Remove the compressor nuts. (6) Remove the compressor. (7) Detach the brazed part of pipes connected with 4-way valve.

Photo 9

Brazed parts of 4-way valve

Suction pipe brazed part

Discharge pipe brazed part

OBH789

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Published: Dec. 2017. No. OBH789 Made in Japan Specifications are subject to change without notice.

Mitsubishi MUZ-AP42VG - ET1, MUZ-AP25VG - ET1, MUZ-AP50VG - E1, MUZ-AP50VG - ET1, MUZ-AP25VGH - E1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual