Mitsubishi Electric PKA-A18HA4, PKA-A12HA4 Installation Manual

Air-Conditioners

PKA-A·HA4

INSTALLATION MANUAL

For safe and correct use, read this manual and the outdoor unit installation manual thoroughly before installing the air-conditioner unit.

MANUEL D’INSTALLATION

Avant d’installer le climatiseur, lire attentivement ce manuel, ainsi que le manuel d’installation de l’appareil extérieur pour une utilisation sûre et correct.

MANUAL DE INSTALACIÓN

Para un uso correcto y seguro, lea detalladamente este manual y el manual de instalación de la unidad exterior antes de instalar la unidad de aire acondicionado.

FOR INSTALLER

English

POUR L’INSTALLATEUR

Français

PARA EL INSTALADOR

Español

Contents

1. Safety precautions .............................................................................................2

2. Installation location ............................................................................................3

3. Installing the indoor unit ....................................................................................3

4. Installing the refrigerant piping ..........................................................................6

1. Safety precautions

► Before installing the unit, make sure you read all the “Safety

precautions”.

► Please report to your supply authority or obtain their consent before

connecting this equipment to the power supply system.

Warning: Describes precautions that must be observed to prevent danger of injury or death to the user.

Caution: Describes precautions that must be observed to prevent damage to the unit.

Warning:

• Ask a dealer or an authorized technician to install the unit.

• For installation work, follow the instructions in the Installation Manual and

use tools and pipe components specifically made for use with refrigerant

specified in the outdoor unit installation manual.

• The unit must be installed according to the instructions in order to

minimize the risk of damage from earthquakes, typhoons, or strong winds.

An incorrectly installed unit may fall down and cause damage or injuries.

• The unit must be securely installed on a structure that can sustain its

weight.

• If the air conditioner is installed in a small room, measures must be taken

to prevent the refrigerant concentration in the room from exceeding the

safety limit in the event of refrigerant leakage. Should the refrigerant leak

and cause the concentration limit to be exceeded, hazards due to lack of

oxygen in the room may result.

• Ventilate the room if refrigerant leaks during operation. If refrigerant

comes into contact with a flame, poisonous gases will be released.

• All electric work must be performed by a qualified technician according to

local regulations and the instructions given in this manual.

• Use only specified cables for wiring.

5. Drainage piping work .........................................................................................7

6. Electrical work ...................................................................................................8

7. Test run ............................................................................................................12

8. Easy maintenance function [This function only for A-control] ..........................14

After installation work has been completed, explain the “Safety precautions,” use, and maintenance of the unit to the customer according to the information in the Operation Manual and perform the test run to ensure normal operation. Both the Installation Manual and Operation Manual must be given to the user for keeping. These manuals must be passed on to subsequent users.

: Indicates a part which must be grounded.

Warning:

Carefully read the labels affixed to the main unit.

• The terminal block cover panel of the unit must be firmly attached.

• Use only accessories authorized by Mitsubishi Electric and ask a dealer or an authorized technician to install them.

• The user should never attempt to repair the unit or transfer it to another location.

• After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes into contact with the flame of a heater or portable cooking range, poisonous gases will be released.

• When installing or relocating, or servicing the air conditioner, use only the specified refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards. The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

1.1. Before installation (Environment)

Caution:

• Do not use the unit in an unusual environment. If the air conditioner is installed in areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, areas exposed to high salt content such as the seaside, the performance can be significantly reduced and the internal parts can be damaged.

• Do not install the unit where combustible gases may leak, be produced, flow, or accumulate. If combustible gas accumulates around the unit, fire or explosion may result.

• Do not keep food, plants, caged pets, artwork, or precision instruments in the direct airflow of the indoor unit or too close to the unit as these items can be damaged by temperature changes or dripping water.

1.2. Before installation or relocation

Caution:

• Be extremely careful when transporting the units. Two or more persons are needed to handle the unit as it weighs 20 kg, 44lbs or more. Do not grasp the packaging bands. Wear protective gloves as you can injure your hands on the fins or other parts.

• Be sure to safely dispose of the packaging materials. Packaging materials, such as nails and other metal or wooden parts may cause stabs or other injuries.

1.3. Before electric work

Caution:

• Be sure to install molded case circuit brakers. If not installed, electric shock may result.

• For the power lines, use standard cables of sufficient capacity. Otherwise, a short circuit, overheating, or fire may result.

• When installing the power lines, do not apply tension to the cables.

• When the room humidity exceeds 80% or when the drainpipe is clogged, water may drip from the indoor unit. Do not install the indoor unit where such dripping can cause damage.

• When installing the unit in a hospital or communications office, be prepared for noise and electronic interference. Inverters, home appliances, high-frequency medical equipment, and radio communications equipment can cause the air conditioner to malfunction or breakdown. The air conditioner may also affect medical equipment, disturbing medical care, and communications equipment, harming the screen display quality.

• Thermal insulation of the refrigerant pipe is necessary to prevent condensation. If the refrigerant pipe is not properly insulated, condensation will be formed.

• Place thermal insulation on the pipes to prevent condensation. If the drainpipe is installed incorrectly, water leakage and damage to the ceiling, floor, furniture, or other possessions may result.

• Do not clean the air conditioner unit with water. Electric shock may result.

• Tighten all flare nuts to specification using a torque wrench. If tightened too much, the flare nut can break after an extended period.

• Be sure to ground the unit. If the unit is not properly grounded, electric shock may result.

• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse), and molded case circuit breaker) with the specified capacity. If the circuit breaker capacity is larger than the specified capacity, breakdown or fire may result.

1.4. Before starting the test run

Caution:

• Turn on the main power switch more than 12 hours before starting operation. Starting operation just after turning on the power switch can severely damage the internal parts.

• Before starting operation, check that all panels, guards and other protective parts are correctly installed. Rotating, hot, or high voltage parts can cause injuries.

• Do not operate the air conditioner without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.

• Do not touch any switch with wet hands. Electric shock may result.

• Do not touch the refrigerant pipes with bare hands during operation.

• After stopping operation, be sure to wait at least five minutes before turning off the main power switch. Otherwise, water leakage or breakdown may result.

2. Installation location

898

35-23/64

Fig. 2-1

3. Installing the indoor unit

2.1. Outline dimensions (Indoor unit) (Fig. 2-1)

249

8-51/64

(mm) (inch)

295

11-39/64

Select a proper position allowing the following clearances for installation and maintenance.

(mm, inch)

ABCDE

Min. 150 Min. 50 Min. 50 Min. 250 Min. 220

Min. 5-29/32 Min. 1-31/32 Min. 1-31/32 Min. 9-27/32 Min. 8-21/32

F Air outlet: Do not place an obstacle within 1500 mm, 59-1/16 inch of the air outlet. G Floor surface H Furnishing I When the projection dimension of a curtain rail or the like from the wall exceeds 60 mm,

2-23/64 inch extra distance should be taken because the fan air current may create a short cycle.

J 1800 mm, 70-7/8 inch or greater from the floor surface (for high location mounting) K 55 mm, 2-11/64 inch or greater with left or rear left piping and optional drain pump

installation

L 550 mm, 21-21/32 inch or greater with optional drain pump installation M Minimum 7 mm, 9/32 inch: 250 mm, 9-27/32 inch or greater with optional drain pump

installation

Note: (For radio frequency interface)

■ Connect a cord of the radio frequency interface to indoor controller

board before mounting the indoor unit on the wall.

■ Refer to P.8 for details on how to installation the radio frequency

interface.

2 3

4 5

Fig. 3-1

2-9/32

14-21/32

14-1/32

12-57/64

11-15/32

10-7/16

8-55/64

7-7/8

4-59/64

2-3/4

19/32

5/8

25/32

1-1/8

1-39/64

2-7/64

2-19/32

3-3/32

3-37/64

4-5/64

4-9/16

5-1/16 6-3/64

6-17/32

7-1/32

9-5/32

9-31/64

9-63/64

9-3/8

8-25/64

6-27/32

3-15/16

10-61/64

CE B

Fig. 3-2

19/32

5/64

2-3/4

4-17/32

4-59/64

7-7/8

8-55/64

7-5/8

7-3/32

5-33/64

6-37/64

Fig. 3-3

9-3/8

10-7/16

11-15/32

(inch)

12-57/64

14-1/32

14-21/32

9-7/64

3.1. Check the indoor unit accessories (Fig. 3-1)

The indoor unit should be supplied with the following accessories.

PART

NUMBER

1 2 3 4 5

ACCESSORY QUANTITY

Mount board 1 Tapping screw 4 × 35 12 Felt tape 3 Band 3 Block of cushion 1

LOCATION OF

Fix at the back of the unit

3.2. Installing the wall mounting fixture (Fig. 3-2)

3.2.1. Setting the wall mounting fixture and piping positions

► Using the wall mounting fixture, determine the unit’s installation position

and the locations of the piping holes to be drilled.

Warning:

Before drilling a hole in the wall, you must consult the building contractor.

A Mount board 1

B Indoor unit C Bottom left rear pipe hole (ø65 mm, 2-9/16 inch) D Bottom right rear pipe hole (ø65 mm, 2-9/19 inch) E Knockout hole for left rear hole (70 mm, 2-3/4 inch × 310 mm, 12-13/14 inch) F Bolt hole (4-ø9 mm, 23/64 inch hole) G Center measurement hole (ø2.5 mm, 3/32 inch hole) H Tapping hole (77-ø5.1 mm, 13/64 inch hole) I Hole centre J Align the scale with the line. K Insert scale.

3.2.2. Drilling the piping hole (Fig. 3-3)

► Use a core drill to make a hole of 65-80 mm, 2-9/16-3-5/32 inch diameter in

the wall in the piping direction, at the position shown in the diagram to the left.

► The hole should incline so that the outside opening is lower than the

inside opening.

► Insert a sleeve (with a 65-80 mm, 2-9/16-3-5/32 inch diameter and

purchased locally) through the hole.

A Sleeve B Hole C (Indoors) D Wal l E (Outdoors)

Note: The purpose of the hole’s inclination is to promote drain flow.

SETTING

3. Installing the indoor unit

Fig. 3-4

Fig. 3-5

Fig. 3-6

)

Fig. 3-7

3.2.3. Installing the wall mounting fixture (Fig. 3-4)

► Since the indoor unit weighs near 13 kg, 29lbs, selection of the mounting

location requires thorough consideration. If the wall does not seem to be strong enough, reinforce it with boards or beams before installation.

► The mounting fixture must be secured at both ends and at the centre, if

possible. Never fix it at a single spot or in any nonsymetrical way.

(If possible, secure the fixture at all the positions marked with a bold

arrow.)

Warning:

If possible, secure the fixture at all positions indicated with a bold arrow.

Caution:

• The unit body must be mounted horizontally.

• Fasten at the holes marked with ▲ as shown by the arrows.

A Min. 90 mm, 3-35/64 inch (617.6 mm, 24-5/16 inch or greater with optional drain pump

installation)

B Min. 200 mm, 7-7/8 inch C Min. 72 mm, 2-53/64 inch (142.5 mm, 5-39/64 inch or greater with left, rear left, or lower

left piping, and optional drain pump installation)

D Fixing screws (4 × 35 mm, 1-3/8 inch) 2 E Level F Fasten a thread to the hole. G

Place the level against the horizontal reference line of the mount board and mount so that it is level. Hang a weight from the thread and align with

H Weight I Mount board 1

EPK of the mount board to permit leveling.

3.3. When embedding pipes into the wall (Fig. 3-5)

• The pipes are on the bottom left.

• When the cooling pipe, drain pipes internal/external connection lines etc are to

be embedded into the wall in advance, the extruding pipes etc, may have to be bent and have their length modified to suit the unit.

• Use marking on the mount board as a reference when adjusting the length of the

embedded cooling pipe.

• During construction, give the length of the extruding pipes etc some leeway.

A Mount board 1 B Reference marking for flare connection C Through hole D On-site piping

3.4. Preparing the indoor unit

* Check beforehand because the preparatory work will differ depending on the

exiting direction of the piping.

* When bending the piping, bend gradually while maintaining the base of the

piping exiting portion. (Abrupt bending will cause misshaping of the piping.)

Extraction and processing of the piping and wiring (Fig. 3-6)

)

1. Connection of indoor/outdoor wiring See page. 8.

2. Wrap the felt tape 3 in the range of the refrigerant piping and drain hose which will be housed within the piping space of the indoor unit.

• Wrap the felt tape 3 securely from the base for each of the refrigerant piping

and the drain hose.

• Overlap the felt tape 3 at one-half of the tape width.

• Fasten the end portion of the wrapping with vinyl tape.

A Liquid pipe B Gas pipe C Indoor/outdoor connection cable D Drain hose E Felt tape 3

3. Be careful that the drain hose is not raised, and that contact is not made with the indoor unit box body. Do not pull the drain hose forcefully because it might come out.

Rear, right and lower piping (Fig. 3-7)

1) Be careful that the drain hose is not raised, and that contact is not made with

the indoor unit box body. Arrange the drain hose at the underside of the piping and wrap it with felt tape 3.

2) Securely wrap the felt tape 3 starting from the base. (Overlap the felt tape at

one-half of the tape width.)

A Cut off for right piping. B Cut off for lower piping.

3. Installing the indoor unit

)

Fig. 3-8

Left and left rear piping (Fig. 3-8)

4. Drain hose replacement See 5. Drainage piping work Be sure to replace the drain hose and the drain cap for the left and rear left

piping. Dripping may occur if you forget to install or fail to replace these parts.

C Drain cap

1) Be careful that the drain hose is not raised, and that contact is not made with

the indoor unit box body.

2) Securely wrap the felt tape 3 starting from the base. (Overlap the felt tape at one-half of the tape width.)

3) Fasten the end portion of the felt tape 3 with vinyl tape.

D Cut off for left piping.

)

Fig. 3-9

Fig. 3-10

3.5. Mounting the indoor unit

1. Affix the mount board 1 to the wall.

2. Hang the indoor unit on the hook positioned on the upper part of the mount board.

Rear, right and lower piping (Fig. 3-9)

3. While inserting the refrigerant piping and drain hose into the wall penetration hole (penetration sleeve), hang the top of the indoor unit to the mount board 1.

4. Move the indoor unit to the left and right, and verify that the indoor unit is hung securely.

5. Fasten by pushing the bottom part of the indoor unit onto the mount board 1. (Fig. 3-10)

* Check that the knobs on the bottom of the indoor unit are securely hooked into

the mount board 1.

6. After installation, be sure to check that the indoor unit is installed level.

A Mount board 1 B Indoor unit C Hook D square hole

Left and left rear piping (Fig. 3-11)

3. While inserting the drain hose into the wall penetration hole (penetration sleeve), hang the top of the indoor unit to the mount board 1.

Giving consideration to the piping storage, move the unit all the way to the left

side, then cut part of the packaging carton and wrap into a cylindrical form as illustrated in the diagram. Hook this to the rear surface rib as a spacer, and raise the indoor unit.

4. Connect the refrigerant piping with the site-side refrigerant piping.

5. Fasten by pushing the bottom part of the indoor unit onto the mount board 1.

* Check that the knobs on the bottom of the indoor unit are securely hooked into

the mount board 1.

6. After installation, be sure to check that the indoor unit is installed level.

A Indoor unit B Packaging cushion C Block of cushion 9

Fig. 3-11

4. Installing the refrigerant piping

45±2°

(inch)

øA

90°±0.5°

R1-64~R1/32

Fig. 4-1

4.1. Precautions

4.1.1. For devices that use R410A refrigerant

• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the flared sections.

• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specified in the table to the below. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust.

Warning: When installing or relocating, or servicing the air conditioner, use only the specified refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards. The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

4.2. Connecting pipes (Fig. 4-1)

• When commercially available copper pipes are used, wrap liquid and gas pipes with commercially available insulation materials (heat-resistant to 100 °C, 212 °F or more, thickness of 12 mm, 1/2 inch or more).

•

The indoor parts of the drain pipe should be wrapped with polyethylene foam insulation materials (specific gravity of 0.03, thickness of 9 mm, 23/64 inch or more).

• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening flare nut.

• Use two wrenches to tighten piping connections.

• Use refrigerant piping insulation provided to insulate indoor unit connections. Insulate carefully.

A Flare cutting dimensions

Copper pipe O.D.

(mm, inch) ø6.35, 1/4” 8.7-9.1, 11/32-23/64 ø12.7, 1/2” 16.2-16.6, 41/64-21/32

Flare dimensions

øA dimensions (mm, inch)

B Flare nut tightening torque

Copper pipe O.D.

(mm, inch) ø6.35, 1/4” 22, 7/8 14-18, 10-13 ø12.7, 1/2” 29, 1-9/64 49-61, 35-44

Flare nut O.D.

(mm, inch)

Tightening torque

(N·m, ft·lbs)

C Apply refrigerating machine oil over the entire flare seat surface. D Use correct flare nuts meeting the pipe size of the outdoor unit.

4.3. Positioning refrigerant and drain piping (Fig. 4-2)

A Gas pipe * Indicates the condition with accessories mounted. B Liquid pipe C Drain hose D Left-side piping knockout hole E Right-side piping knockout hole F Lower piping knockout hole G Mount board 1

2-23/32

15/64

1-11/16

2-13/64

35-23/64

1-27/32

2-13/64

15/64

1-11/16

25/32

11-39/64

2-13/64

21-7/32

17-63/64

24-1/64

(B)

(A)

(C)

1-27/32

2-23/64

6-7/32

6-21/32

7-7/32

5-5/16

1-11/16

2-21/64

Fig. 4-2

Fig. 4-3

4.4. Refrigerant piping (Fig. 4-3)

Indoor unit

1. Remove the flare nut and cap of the indoor unit.

2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil

(available from your local supplier) to the flare sheet surface.

3. Quickly connect the on site cooling pipes to the unit.

4. Wrap the pipe cover that is attached to the gas pipe and make sure that the

connection join is not visible.

5. Wrap the pipe cover of the unit’s liquid pipe and make sure that it covers the

insulation material of the on site liquid pipe.

6. The portion where the insulation material is joined is sealed by taping.

A Site-side refrigerant piping B Unit side refrigerant piping

4. Installing the refrigerant piping

Fig. 4-4

5. Drainage piping work

Fig. 5-1

4.4.1. Storing in the piping space of the unit (Fig. 4-4)

1. Wrap the supplied felt tape in the range of the refrigerant piping which will be

housed within the piping space of the unit to prevent dripping.

2. Overlap the felt tape at one-half of the tape width.

3. Fasten the end portion of the wrapping with vinyl tape, etc.

A Gas pipe B Liquid pipe C Indoor/outdoor connection cable D Felt tape 3

5.1. Drainage piping work (Fig. 5-1)

• Drain pipes should have an inclination of 1/100 or more.

• For extension of the drain pipe, use a soft hose (inner dia. 15 mm, 19/32 inch)

available on the market or hard vinyl chloride pipe (VP-16/O.D. ø22 mm, ø55/64 inch PVC TUBE). Make sure that there is no water leakage from the connections.

• Do not put the drain piping directly in a drainage ditch where sulphuric gas may

be generated.

• When piping has been completed, check that water flows from the end of the

drain pipe.

Caution: The drain pipe should be installed according to this Installation Manual to ensure correct drainage. Thermal insulation of the drain pipes is necessary to prevent condensation. If the drain pipes are not properly installed and insulated, condensation may drip on the ceiling, floor or other possessions.

A Inclined downwards

B Must be lower than outlet point

C Water leakage

D Trapped drainage

E Air

F Wav y

G The end of drain pipe is under water.

H Drainage ditch

I 5 cm, 1-31/32 inch or less between the end of drain pipe and the ground.

J Drain hose

K Soft PVC hose (Inside diameter 15 mm, 19/32 inch)

or Hard PVC pipe (VP-16) * Bond with PVC type adhesive

Preparing left and left rear piping (Fig. 5-2)

1 Remove the drain cap.

Fig. 5-2

Fig. 5-3

• Remove the drain cap by holding the bit that sticks out at the end of the pipe and

pulling.

A Drain cap

2 Remove the drain hose.

• Remove the drain hose by holding on to the base of the hose a (shown by

arrow) and pulling towards yourself b.

3 Insert the drain cap.

• Insert a screwdriver etc into the hole at the end of the pipe and be sure to push

to the base of the drain cap.

4 Insert the drain hose.

• Push the drain hose until it is at the base of the drain box connection outlet.

• Please make sure the drain hose hook is fastened properly over the extruding

drain box connection outlet.

B Hooks

Storing in the piping space of the indoor unit (Fig. 5-3)

* When the drain hose will be routed indoors, be sure to wrap it with commercially

available insulation.

* Gather the drain hose and the refrigerant piping together and wrap them with the

supplied felt tape 3. * Overlap the felt tape 3 at one-half of the tape width. * Fasten the end portion of the wrapping with vinyl tape, etc.

A Gas pipe B Liquid pipe C Drain hose D Indoor/outdoor connection wiring E Felt tape 3

Check of drainage (Fig. 5-4)

1. Open the front grille and remove the filter.

2. Facing the fins of the heat exchanger, slowly fill with water.

3. After the drainage check, attach the filter and close the grille.

Fig. 5-4

6. Electrical work

2-11/64 inch

15/32 inch

or Q

POLM N

Fig. 6-1

6.1. Indoor unit (Fig. 6-1)

Connection can be made without removing the front panel.

15/32 inch

2-11/54 inch

S2 S3

C H

1. Open the front grille, remove the screw (1 piece), and remove the electrical parts

cover.

* Electrical work can be conducted more effectively with the panel removed. When

attaching the panel, check that the hooks K at five locations on the air outlet side

are connected securely.

2. Securely connect each wire to the terminal board. * In consideration of servicing, provide extra length for each of the wires. * Take care when using strand wires, because beards may cause the wiring to

short out.

3. Install the parts that were removed back to their original condition.

4. Fasten each of the wires with the clamp under the electrical parts box.

A Electrical box cover B Fixing screw (Electrical box cover) C Earth wire connection portion E Indoor/outdoor connection terminal board: S1, S2, and S3, have polarity F Lead H Earth wire: Connect earth wire in the direction illustrated in the diagram. J Indoor/outdoor connection cord K Hook L Conduit plate M Bush (purchased locally) N Lock nut (purchased locally) O Connector (purchased locally) P Conduit (purchased locally) R Conduit cover S Fixing screw (Conduit cover)

Only for wired remote controller

D Wired remote control terminal board: 1 and 2, do not have polarity G Terminal screw I Wired remote control cord

Only for Radio frequency interface code.

Q Radio frequency interface code.

Fig. 6-2

■ For radio freguency interface.

1. Press and unlock the knobs on both sides of the front panel and lift the front panel until it is level. Pull the hinges forward to remove the front panel. (Fig. 6-3)

2. Move the horizontal vanes in a downward direction.

3. Remove the screw caps of the panel. Remove the screws. (Fig. 6-2)

4. Hold the lower part of both ends of the panel and pull it slightly toward you, and then remove the panel by pushing it upward.

A Front panel B Va ne C Screw caps

Fig. 6-3

6. Electrical work

5. Remove the room temp. thermistor TH1. (Fig. 6-4)

6. Remove the electrical box covers (screw 4 × 12). (Fig. 6-4)

7. Connect the electric code of radio frequency interface securely to CN105 (RED) on indoor controller board. (Fig. 6-6)

8. Replace the removed parts.

D Electrical box cover (top) E Electrical box cover (side) F Screw (top cover) G Screw (side cover) H Room temp. thermistor (TH1) I Screw (side cover)

J Indoor controller board

Fig. 6-4

Fig. 6-5

TOP

Warning

K Sharp-edged parts

Warning: Be extremely careful not to cut your hands by Sharp-edged parts or end faces of the box. There are some Sharp-edged parts on the indoor controller board.

CN105

FRONT

(RED)

Fig. 6-6

Warning:

Sharp-edged parts

6. Electrical work

6.1.1. Indoor unit power supplied from outdoor unit (A-control application)

The following connection patterns are available. The outdoor unit power supply patterns vary on models.

1:1 System

CN105 (RED)

1 2

* Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.

Simultaneous twin/triple/four system

A Outdoor unit power supply B Wiring circuit breaker or isolating switch C Outdoor unit D Indoor unit/outdoor unit connecting cords

E Wired remote controller F Indoor unit G Indoor unit earth H Indoor controller board I Radio frequency interface for RF thermostat

A Outdoor unit power supply B Wiring circuit breaker or isolating switch C Outdoor unit D Indoor unit/outdoor unit connecting cords E Wired remote controller F Indoor unit G Indoor unit earth

■

Only for wired remote controller.

* Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.

Indoor unit model PKA-A·HA4 Minimum circuit ampacity 1A Maximum rating of overcurrent protective device 15A

Indoor unit-Outdoor unit *1 3 × AWG16 (Polar) Indoor unit earth 1 × Min. AWG16

Wiring

× size

Wire No.

Wired remote controller-Indoor unit *2 2 × AWG22 (Non-polar, unshielded) Indoor unit-Outdoor unit S1-S2 *3 AC 208/230 V Indoor unit-Outdoor unit S2-S3 *3 DC24 V

rating

Circuit

Wired remote controller-Indoor unit *3 DC12 V

*1. Max. 50 m, 165 ft *2. The 3 m, 9 ft wire is attached in the wired remote controller accessory. Max. 500 m, 1500 ft *3. The figures are NOT always against the ground. S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulataed by the transformer or other device.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Use copper supply wires.

3. Use wires rated 300V or more for the power supply cords and the indoor unit/outdoor unit connecting cords.

4. Install an earth longer than other cords.

6.2. Remote controller

6.2.1. For wired remote controller

1) Two wired remote controllers setting

If two wired remote controllers are connected, set one to “Main” and the other to “Sub”. For setting procedures, refer to “Function selection of remote controller” in the operation manual for the indoor unit.

6.2.2. For IR wireless remote controller

1) Setting (Fig. 6-7)

1 Insert batteries. 2 Press the SET button with something sharp at the end.

blinks and Model No. is lighted.

3 Press the temp 4 Press the SET button with something sharp at the end.

and Model No. are lighted for three seconds, then turned off.

PKA (A12, A18)

button to set the Model No.

heat pump models 002

cooling only models 034

2,4

ON/OFF TEMP

FAN

VANE

MODE

LOUVER

CHECK

TEST RUN

RESETSET CLOCK

AUTO STOP

AUTO START

min

Fig. 6-7

6. Electrical work

1,4

BACK DAY

PAR-21MAA

CHECK

FAN

VANE

LOUVER

RESETSET CLOCK

TEMP.

MONITOR/SET

AUTO STOP

AUTO START

min

ON/OFF

CLOCK

OPERATION

C,D

A B

F E

ON/OFF TEMP

MODE

CHECK

TEST RUN

ON/OFF TEMP

FAN

VANE

MODE

LOUVER

CHECK

TEST RUN

RESETSET CLOCK

Fig. 6-8

ON/OFF

FILTER

CHECK

TEST

CLEAR

Fig. 6-9

Fig. 6-10

AUTO STOP

AUTO START

A B

CHECK

2) Assigning a IR wireless remote controller to each unit (Fig. 6-8)

Each unit can be operated only by the assigned IR wireless remote controller.

Make sure each pair of an indoor unit PC board and a IR wireless remote controller is assigned to the same pair No.

3) IR wireless remote controller pair number setting operation

1 Press the SET button with something sharp at the end. Start this operation from the status of IR wireless remote controller display

min

turned off.

blinks and Model No. is lighted.

min

2 Press the

button twice continuously. Pair No. “0” blinks. 3 Press the temp

button to set the pair number you want to set. 4 Press the SET button with something sharp at the end. Set pair number is lighted for three seconds then turned off.

A Pair No. of IR wireless remote controller

Indoor PC board

0 Factory setting 1 Cut J41 2 Cut J42

3-9 Cut J41, J42

6.3. Function settings

Mode number Setting number Refrigerant address Unit number

CHECKCHECK

CHECK

6.3.1 Function setting on the unit (Selecting the unit functions)

1) For wired remote controller (Fig. 6-9)

Changing the power voltage setting

• Be sure to change the power voltage setting depending on the voltage used. 1 Go to the function setting mode.

Switch OFF the wired remote controller. Press the A and B buttons simultaneously and hold them for at least 2

seconds. FUNCTION will start to flash.

2 Use the C button to set the refrigerant address (3) to 00. 3 Press D and [--] will start to flash in the unit number (4) display. 4 Use the C button to set the unit number (4) to 00. 5 Press the E MODE button to designate the refrigerant address/unit number. [--]

will flash in the mode number (1) display momentarily.

6 Press the F buttons to set the mode number (1) to 04. 7 Press the G button and the current set setting number (2) will flash.

Use the F button to switch the setting number in response to the power supply

voltage to be used. Power supply voltage 230 V : setting number = 1 208 V : setting number = 2 8 Press the MODE button E and mode and the setting number (1) and (2) will

change to being on constantly and the contents of the setting can be confirmed. 9 Press the FILTER A and TEST RUN B buttons simultaneously for at least two

seconds. The function selection screen will disappear momentarily and the air

conditioner OFF display will appear.

2) For IR wireless remote controller (Fig. 6-10)

Changing the power voltage setting

• Be sure to change the power voltage setting depending on the voltage used.

1 Go to the function select mode

2 Setting the unit number

3 Selecting a mode

Current setting number: 1 = 1 beep (one second) 2 = 2 beeps (one second each) 3 = 3 beeps (one second each)

4 Selecting the setting number

5 To select multiple functions continuously

6 Complete function selection

Note: Whenever changes are made to the function settings after installation or maintenance, be sure to record the changes with a mark in the “Setting” column of the Function table.

CHECK

Press the

button F twice continuously.

(Start this operation from the status of IR wireless remote controller display turned off.)

CHECK

is lighted and “00” blinks. Press the temp controller toward the receiver of the indoor unit and press the

Press the temp wireless remote controller toward the receiver of the indoor unit and press the

min

button B.

Enter 04 to change the power voltage setting using the Direct the IR wireless remote controller toward the receiver of the indoor unit and press the

Use the (230 V). Direct the IR wireless remote controller toward the sensor of the indoor

unit and press the

button C once to set “50”. Direct the IR wireless remote

button A.

button C and D to set the unit number “00”. Direct the IR

C and D buttons.

button A.

C and D buttons to change the power voltage setting to 01

button A.

Repeat steps 3 and 4 to change multiple function settings continuously.

Direct the IR wireless remote controller toward the sensor of the indoor unit and press the

button E.

6.3.2 Function setting on the remote controller

For details on how to operate the remote controller, refer to the appropriate operation manual included with each remote controller.

6. Electrical work

Function table

Select unit number 00

Mode Settings

Power failure automatic recovery Indoor temperature detecting Indoor unit operating average

LOSSNAY connectivity Not Supported

Power voltage 230 V

Select unit numbers 01 to 03 or all units (AL [wired remote controller]/07 [wireless remote controller])

Mode Settings

Filter sign 100Hr

Fan speed Silent

*1 When the power supply returns, the air conditioner will start 3 minutes later.

Not available Available *1

Set by indoor unit’s remote controller 2 Wired remote controller’s internal sensor 3

Supported (indoor unit is not equipped with outdoor-air intake) 2 Supported (indoor unit is equipped with outdoor-air intake) 3

208 V 2

2500Hr 2 No filter sign indicator 3

Standard High ceiling 3

7. Test run

Mode No.

Wired remote controller

(RF thermostat)

(101)

(—)

(103)

(104)

Mode No.

Wired remote controller

(RF thermostat)

(107)

(108)

Setting no. Initial setting setting

1 2 1

Setting no. Initial setting setting

–

7.1. Before test run

► After completing installation and the wiring and piping of the indoor and

outdoor units, check for refrigerant leakage, looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply.

► Use a 500-volt megohmmeter to check that the resistance between the

power supply terminals and ground is at least 1.0 MΩ.

► Do not carry out this test on the control wiring (low voltage circuit)

Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ. Insulation resistance.

7.2. Test run

■ Refer to the installation manual that comes with each remote controller for details.

7.3. Self-check

■ Refer to the installation manual that comes with each remote controller for details.

■ RF thermostat is not established.

• Refer to the following tables for details on the check codes. (IR wireless remote controller) [Output pattern A]

Beeper sounds

OPERATION INDICATOR lamp flash pattern

[Output pattern B]

Beeper sounds

OPERATION INDICATOR lamp flash pattern

Beep

Self-check starts (Start signal received)

Beep

Self-check starts (Start signal received)

Beep Beep Beep Beep Beep

Beep

Off

Approx. 2.5 sec.On0.5 sec.

Number of flashes/beeps in pattern indicates the check code in the following table (i.e., n=5 for “P5”)

Off

Approx. 2.5 sec.

Approx. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.

2nd3

0.5 sec.On0.5 sec.

Beep Beep Beep Beep Beep Beep

Number of flashes/beeps in pattern indicates the check code in the following table (i.e., n=5 for “U2”)

0.5 sec.

1st2nd3

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

terminals. Warning:

1st2

Number of flashes/beeps in pattern indicates the check code in the following table

0.5 sec.

· · · Repeated

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

1st2

Number of flashes/beeps in pattern indicates the check code in the following table

· · · Repeated

7. Test run

[Output pattern A] Errors detected by indoor unit

IR wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes

Check code (Number of times)

[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)

IR wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes

*1 If the beeper does not sound again after the initial two beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not come

on, there are no error records.

*2 If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm the self-check start signal was received, the

specified refrigerant address is incorrect.

• On IR wireless remote controller The continuous buzzer sounds from receiving section of indoor unit. Blink of operation lamp

• On wired remote controller Check code displayed in the LCD.

• If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.

PLEASE WAIT

PLEASE WAIT → Error code

Display messages do not appear even when operation switch is turned ON (operation lamp does not light up).

On the IR wireless remote controller with condition above, following phenomena takes place.

• No signals from the remote controller are accepted.

• OPE lamp is blinking.

• The buzzer makes a short pipng sound.

Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For description of each LED (LED 1, 2, 3) provided on the indoor controller, refer to the following table.

LED 1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is always lit. LED 2 (power for remote controller) Indicates whether power is supplied to the remote controller. This LED lights only in the case

LED 3 (communication between indoor and outdoor units only A-control) Indicates state of communication between the indoor and outdoor units. Make sure that this

1 P1 Intake sensor error 2 P2, P9 Pipe (Liquid or 2-phase pipe) sensor error 3 E6, E7 Indoor/outdoor unit communication error 4 P4 Float switch connector CN4F open.

6 P6 Freezing/Overheating safeguard operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error

9 E4 Remote controller signal receiving error 10 – – 11 – – 12 Fb Indoor unit control system error (memory error, etc.)

No sound – – – – No corresponding

(Number of times)

1 E9 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)

2 UP Compressor overcurrent interruption

3 U3, U4 Open/short of outdoor unit thermistors

4 UF Compressor overcurrent interruption (When compressor locked)

5 U2 Abnormal high discharging temperature/49C worked/insufficient refrigerant

6 U1, Ud Abnormal high pressure (63H worked)/Overheating safeguard operation

7 U5 Abnormal temperature of heat sink

8 U8 Outdoor unit fan safeguard stop

9 U6 Compressor overcurrent interruption/Abnormal of power module 10 U7 Abnormality of super heat due to low discharge temperature 11 U9, UH Abnormality such as overvoltage or voltage shortage and abnormal

12 – – 13 – – 14 Others Other errors (Refer to the technical manual for the outdoor unit.)

Wired remote controller LED 1, 2 (PCB in outdoor unit)

Wired remote

controller

RF thermostat

Check code

P5 Drain pump error PA Forced compressor error

Wired remote

controller

RF thermostat

Check code

For about 2 minutes following power-on

After about 2 minutes has expired following power-on

Symptom Remark

synchronous signal to main circuit/Current sensor error

Symptom

After LED 1, 2 are lighted, LED 2 is turned off, then only LED 1 is lighted. (Correct operation)

Only LED 1 is lighted. → LED 1, 2 blink.

Only LED 1 is lighted. → LED 1 blinks twice, LED 2 blinks once.

of the indoor unit which is connected to the outdoor unit refrigerant address “0”.

LED is always blinking.

For details, check the LED display of the outdoor controller board.

Cause

• For about 2 minutes following power-on, operation of the remote controller is not possible due to system start-up. (Correct operation)

• Connector for the outdoor unit’s protection device is not connected.

• Reverse or open phase wiring for the outdoor unit’s power terminal block (L1, L2, GR)

• Incorrect wiring between indoor and outdoor units (incorrect polarity of S1, S2, S3)

• Remote controller wire short

8. Easy maintenance function [This function only for A-control]

Display example (Comp discharge temperature 147°F)

ACB

Maintenance mode operation procedures

(1) Press the

activate the maintenance mode.

(2) Press the TEMP.

(3) Select the data you want to display.

Compressor information

Outdoor unit information

ON/OFF

Indoor unit information

* The filter operation time displayed is the number of hours the filter has been

used since the filter reset was performed.

(4) Press the

(5) The data is displayed in C.

* Repeat steps (2) to (5) to check another date.

(6) Press the

to deactivate the maintenance mode.

TEST

button for three seconds to

buttons to set the refrigerant address.

Cumulative operation time

Display A

FILTER

TEST

COMP ON x10 HOURS

Heat exchanger temperature

OUTDOOR UNIT H·EXC. TEMP

Indoor room temperature

INDOOR UNIT INLET TEMP

button.

Display C

button for three seconds or press the

Approx. 10 sec.

MAINTENANCE

Operation current

COMP ON CURRENT (A)

Outdoor ambient temperature

OUTDOOR UNIT OUTDOOR TEMP

Filter operation time

INDOOR UNIT FILTER USE H

ON/OFF

Display A

Display B

ON/OFF number

COMP ON x100 TIMES

Comp discharge temperature

OUTDOOR UNIT OUTLET TEMP

Heat exchanger temperature

INDOOR UNIT H·EXC. TEMP

(Airflow temperature display example)

Flashing

Waiting for response

147°F

button

■

Only for wired remote controller

By using the maintenance mode, you can display many types of maintenancedata on the wired remote controller such as the heat exchanger temperature and compressor current consumption for the indoor and outdoor units. This function can be used whether the air conditioner is operating or not. During air conditioner operation, data can be checked during either normal operation or maintenance mode stable operation.

* This function cannot be used during the test run. * The availability of this function depends on the connecting outdoor unit. Refer

to the brochures.

Stable operation

Using the maintenance mode, the operation frequency can be fixed and the

operation can be stabilized. If the air conditioner is stopped, use the following procedure to start this operation.

Display A

Display D

MODE

button to select the operation mode.

FILTER

Stable cooling operation

COOL STABLE MODE

button.

Stable heating operation

HEAT STABLE MODE

Stable operation cancellation

STABLE MODE CANCEL

10-20 min.

Stable operation

Press the

Waiting for stable operation

* You can check the data using steps (3) to (5) of the maintenance mode

operation procedures while waiting for the stable operation.

+ 30 hidden pages

Mitsubishi Electric PKA-A18HA4, PKA-A12HA4 Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual