Technibel MAFK90R5TAAA User manual

SERVICE MANUAL

MAFK90R5TAAA + GRFK90R5TAAA

MAFK120R5TAAA + GRFK120R5TAAA

CONTENTS

Contents

Safety precautions

Installation

Block diagram

Trouble shooting

Fault diagnosis by symptom

Control specification

To disassemble mechanical parts

Exploded views and parts list

Wiring diagrams

The following safety precautions must be taken when using your air

conditioner.

SAFETY PRECAUTIONS

1. Warning: Prior to repair, disconnect thepower cord.

2. Use properparts: use onlyexact replacement parts.(Also, we recommend replacing parts rather

than repairing them.)

3. Use theproper tools: use the proper toolsand test equipment, and know howto use them. Using

defective tools ortest equipment may cause problems later-intermittentcontact, for example.

4. Power cord:prior to repair, check the power cord andreplace it if necessary.

5. Avoid using anextension cord, and avoid tapping intoa power cord. This practice may result in

malfunction or fire.

6. Aftercompleting repairs and reassembly, check the insulation resistance.

Procedure: prior toapplying power, measure the resistancebetween the power cord and theground

terminal. The resistance must be greater than 30megohms.

7. Make surethat the grounds are adequate.

8. Make surethat the installation conditions are satisfactory. Relocate the unit if necessary.

9. Keep childrenaway from the unit while itis being repaired.

10. Be sureto clean the unit and itssurrounding area.

Location of indoor unit

A place solid enough to bear the weight of the unit and not cause any shake.

Good ventilation, less dust, far from direct rain and sunshine.

Avoid places close to inflammable gas leakage.

Keep the air inlet and outlet at a far distance from the blockage.

Keep the height distance between the indoor and outdoor unit at most 5m.

Mount on the wall solid enough to bear the weight of the unit and not cause any shake.

Avoid direct sunshine.

A place easy for condensate drain and easy for connecting with the outdoor unit.

Keep a far distance away from the fluorescent lamp, it may influence the operation of remote controller.

Location of outdoor unit

Keep at least 1m away from the TV radio and other home appliances.

A place where the air discharged out of the outdoor unit or the operation noise will not annoy your

neighbours.

No blockage near the outdoor unit.

Avoid places close to inflammable gas leakage.

Selecting area for installation

INSTALLATION

Select an area for installation that is suitable to the customer’s needs.

It is harmful to the air conditioner if it is used in the following environments: greasy areas (including area

near machines). Salty area such as coastal areas, areas where sulfuric gas is present such as hot spring

areas. Contact your dealer for advice.

Caution:

front

right

back

Underside Left-back

back

Notice: do not elevate the

drain hose.

The copper pipe can be led

from back, right, underside,

or left-back side.

Cover connecting pipe with

adiabatic material.

Sponge plastic adiabatic

material with the

thickness of 8mm.

While installing the pipeline on the

thin armor plate or on the wall of

metal mesh, you should use the

wooden board to clamp between

the wall and the pipeline, or wrap

up the pipeline with 7-8 layers of

insulating plastic tape.

left

100mm

above 300mm

above 500mm

above 300mm

above 500mm

INSTALLATION

Installation diagram of indoor unit and outdoor unit

above 155mm

above 250mm

Above 20mm

above 105mm

Confirm the installation position by the mark of the indoor mounting plate.

Note Different models have different mounting plates, the

installing charts of this book are presented just for the purpose

of illustration, please take the real objects as reference.

INSTALLATION

Securing the mounting plate and drill on the wall

Pipe hole

Center of hole( 65mm)

Drill on the wall

Operation

2.Use the aiguille to drill a hole with a diameter of 65mm .

1.Confirm the position of the wall hole according to the chart (If it need to orientat a hole on the left

side of the mounting plate, please refer to the method of orientating the right wall hole in the above chart).

Secure the mounting plate

The mounting plate should be attached to the structural part of wall (post etc).

fasten string at the central hole

105mm or more

from sidewall

NOTICE: The holes at solid arrow position must be secured to avoid the shake of mounting plate.

When the expansion bolts are used, two holes ( 11 20 or 11 26 ) that the distance

between them is 450mm should be adopted.

Tapping screw

ST4 25(5)

plumb

mounting plate

at least 250mm

from sidewall

155mm or more

Note:Different models have different mounting plates, the installing charts of this book are presented

just for the purpose of illustration, please take the real objects as reference.

Wiring

Open the front grille;

Remove the screw from electrical box cover, pull the

electrical box cover away from the unit and set aside.

Remove the screw from fastener, pull the fastener

away from the unit and set aside.

Connect the cable.

Replace the fastener and electrical box cover.

Indoor unit terminal

Screw

Connecting cable

Diagram

INSTALLATION

The drain hose must be arranged beneath the copper pipe.

The drain hose must not be hunched or twisted.

While wrapping up the drain hose, do not pull it.

The drain hose through the room must be wrapped up by the

thermal insulation materials.

The copper pipe and the drain hose must be wrapped up by felt

strip. Adiabatic pad should be used at where the pipe contacts

the wall.

NOTE:

ROUTE OF PIPE

If pipe comes out of the right side of the indoor unit, cut part

1 of the unit;

If pipe comes out of the lower-right side of the indoor unit, cut

part 2 of the unit;

If pipe comes out of the left side of the indoor unit, cut part 3

of the unit.

Installation of the drain hose

Drain hose

gaspipe

Liquid pipe

felt

Adiabatic

underlay

drain hose

If pipe comes out of the left side of the indoor unit, the drain hose

must be refitted, otherwise water leakage may occur.

Refit methods: Interchange the position of drain hose and drain

rubber plug.

Clearance is not allowed after refit, it would lead to water leakage.

Drain rubber

plug

REFIT OF DRAIN HOSE

NOTE:

The appliance shall be installed in accordance with national wiring regulations.

The appliance must not be installed in the laundry.

The appliance must be installed 2.3m above the floor.

The appliance must be positioned so that the plug is accessible.

For some modelswhose cooling capacity are above 4600W(17000BTU/h),

an all-pole disconnectiondevice which has at least 3mmseparation distance in

all pole anda residual current device(RCD)with the ratingof above 10mAshall

be incorporated inthe fixed wiring according to thenational rule.

Arrangement of the drain hose

To drain the condensate water easily, the drain hose should be declined downwards.

The following 5 arrangement methods are incorrect.

Decline

downward

(Fig. 1) (Fig. 2) (Fig. 3) (Fig. 4)

Water

leak

Standing water

air

Dip hose

into water

(Fig. 5)

50mm or less

above floor

Decline

downward

Water

leak

Water

leak

If you find the drain hose not long enough to connect with the indoor

unit, you can extend it with the hoses in the accessory box.

The drain hose through the room must be wrapped up with the special

adiabatic material.

Drain hose

Hose(ID 15cm)

PVC hard

INSTALLATION

Pipe Connection

DIAMETER OF PIPE

6.35mm ( 1/4 )

9.52mm ( 3/8 )

12.7mm ( 1/2 )

TORQUE(N m)

13.7---17.6

34.3---41.2

49.0---56.4

Align the centre of joint in line with that of flare and tighten the nut of connecting pipe with wrench.

Put some seal oil to cover the joint and the flare.

15.88mm ( 5/8 ) 73.0---78.0

The number of bent position of the pipe in the indoor unit should not exceed 10.

The number of bent position of the pipe in the indoor unit and the outdoor unit should not exceed 15.

The radius of bent position should be more than 10cm.

Evaporator

craft tube

Do not exhaust the inside air just by loosing the nut since there is the air of certain pressure

inside the tube of indoor unit. Please do not make extra effort for fear of damaging the flare.

Attention:

Please break the evaporator craft tube with pincers before connecting. After exhausting the inside air,

use the wrench to twist down the nut of connecting tube of the evaporator.

Installation of the indoor unit

Let pipe go through the wall hole and attach the indoor

unit to the mounting plate.(Press the rib of indoor unit

inside the hook of the mounting plate.) the rib of indoor unit

the mounting plate

Bottom

Indoor unit

Wall sealing and Pipe fastening

Use putty to seal the wall hole.

Use clamp (pipe fastener) to secure the pipe at specified position.

Indoor unit

clamp

screw

get rid of unwanted part

seal with putty

secure the connecting

pipe with clamp

INSTALLATION

Connecting

cable

Outdoor unit terminal

Wiring

1 Remove theself-tapping screws (2 pcs)

on the maintenanceboard and take out the

maintenance board.

Maintenance

board

Terminalboard

Fix the cablewire

with anchor cable

Piping cover

Please utilize outdoorpipe support when

the cable wireis led from the backside.

Outdoor pipe support

(Outdoor pipe supportis not required

when leading thecable wire from other places).

The cable wire can be led from the back hole

of the pipinghole or ejecting hole.

Maintenance

board

Piping cover Ejecting hole

Right wiring

Back wiring

Sponge

Piping cover

2 Loosen theself-tapping screws (2 pcs) on

the fixing clip to loosen thefixing clip.

5 Install themaintenance board. After the pipes

and cable wireare installed, please seal the

sponge block asper drawing indication.

3 Loosen thefixing screw of the wire terminal

board, pass thepower wire and signal wire

through the fixing clip. Then firmly fix the

power wire andsignal wire on the terminal

board with thefixing screw. (Earth wire

must be connectedfirmly.)

4 Tightenthe self-tapping screw on the fixingclip.

Wiring For Above 6000W Model (Above 21000BTU/h Model)

Connecting

cable

Outdoor unit terminal

Installation diagram of indoor unit and outdoor unit

INSTALLATION

If the interconnectioncord for powersupply has tobe replaced, please see the

following table for reference.

Notice:

If the signal wire hasto be bought separately, choose electric wireabove 0.75mm.

MODEL SPECS (Interconnection cord)

2700W(10000BTU/h) 1.0mm

3000W(11000BTU/h) -4000W(15000BTU/h)

4500W(18000BTU/h) -8000W(28000BTU/h) 2.5mm

1.5mm

WARNING:

Special cable must be used to connect indoor unit and outdoor unit. It should be ensured

that the terminals are not influenced by external force. Poor connection may cause fire.

The electric box cover must be mounted and secured in position, otherwise fire or electrical

shock may occur because of dust or moisture.

The connecting cables must be clipped together.

Please take the electric circuit diagram attached to the indoor/outdoor units as major

reference while installing.

The power wire and signal wire between the indoor/outdoor units must be connected

one by one as per corresponding number on the wiring terminal board.

All the models shall be connected with the mains which has system impedance limitations.

While installing the unit, please see the following table for impedance information or

consult with the supply authority.

The temperature of refrigerant circuit will be high, please keep the interconnection cable away

from the copper tube.

3500W (12000BTU/h) 0.219

5100W (18000BTU/h) 0.186

R410A

series

6800W (18000BTU/h) 0.124

Burr

Oblique

Copper pipe

90 Roughness

Reamer

Burr

Outer diameter A(mm)

2.0--2.5

3.0--3.5

3.5--4.0

6.35mm ( 1/4 )

9.52mm ( 3/8 )

12.7mm ( 1/2 )

15.88mm(5/8 ) 4.0--4.5

Air exhausting

Installation of the drain joint(only for heat pump type)

Bottom

Double-channel

drain joint Drain hose

Joint of the connecting pipe

Put some seal oil to cover the joint and the flare.

Align the centre of joint in line with that of flare and tighten the nut of connecting pipe

with wrench. ( Adjust the torque by the same method of connecting pipe for indoor unit.)

Insert the outdoor double-channel drain joint in one of the

bottom holes of the suitable size then connect drain hose

and joint together.

gas shut-off

valve

liquid shut-off valve

service port

gas connecting

pipe

liquid connecting pipe

valve nuts

service port cap

allen wrench

Screw down the cap of both gas shut-off valve and

liquid shut-off valve as well as the nut of service port.

Use Allen wrench to turn the valve cork of liquid side

at 90 counter-clockwise, and close it after 10 seconds.

Use soapy water to check the gas leakage especially

at all joint. If there is no gas leakage, please turn the

valve cork of liquid side at 90 counter-clockwise again.

Press the cork of service port at gas shut-off valve, 10

seconds later, when you see foggy gas discharged, that

means inner air is exhausted out.

Use Allen wrench to turn the valve cork of both liquid

shut-off valve and gas shut-off valve counter-clockwise

until they are completely open and then replace the

valve caps and tighten them.

Process of flared tube

Use the pipe cutter to cut off the broken part of flare.

Remove burrs at the cut of the flare.

Insert a nut into the connecting pipe and do flaring

with specified flaring tools, reamers for example.

Check the quality of flaring technique.

Remove burrs at the cut of the flare.

INSTALLATION

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