Mitsubishi Electronics P500YMF-C, PURY-P400 User Manual

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AIR CONDITIONERS CITY MULTI

Models PURY-P400, P500YMF-C

Service Handbook

Contents

1 PRECAUTIONS FOR DEVICES THA T USE R407C REFRIGERANT ..... 3

[1] Storage of Piping Material................................................................. 4

[2] Piping Machining............................................................................... 5

[3] Brazing.............................................................................................. 6

[4] Airtightness Test................................................................................ 7

[5] Vacuuming ........................................................................................ 7

[6] Charging of Refrigerant..................................................................... 8

[7] Dryer ................................................................................................. 8

2 COMPONENT OF EQUIPMENT ............................................................. 9

[1] Appearance of Components ............................................................. 9

[2] Refrigerant Circuit Diagram and Thermal Sensor ........................... 17

[3] Electrical Wiring Diagram................................................................ 20

[4] Standard Operation Data ................................................................ 24

[5] Function of Dip SW and Rotary SW................................................ 26

3 TEST RUN .............................................................................................29

[1] Before T est Run............................................................................... 29

[2] Test Run Method............................................................................. 33

4 GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET

REMOTE CONTROLLER ...................................................................... 34

5 CONTROL.............................................................................................. 40

[1] Control of Outdoor Unit ................................................................... 40

[2] Control of BC Controller.................................................................. 49

[3] Operation Flow Chart...................................................................... 50

[4] List of Major Component Functions ................................................ 56

[5] Resistance of Temperature Sensor................................................. 59

6 REFRIGERANT AMOUNT ADJUSTMENT............................................ 60

[1] Operating Characteristics and Refrigerant Amount ........................ 60

[2] Adjustment and Judgement of Refrigerant Amount........................ 60

[3] Refrigerant Volume Adjustment Mode Operation............................ 62

7 TROUBLESHOOTING ...........................................................................66

[1] Principal Parts................................................................................. 66

[2] BC Controller Disassembly Procedure............................................ 99

[3] Self-diagnosis and Countermeasures Depending on the Check

Code Displayed............................................................................. 104

[4] LED Monitor Display ..................................................................... 121

8 PREP ARATION, REPAIRS AND REFRIGERANT REFILLING WHEN

REP AIRING LEAKS ............................................................................. 141

[1] Location of leaks:

[2] Location of leaks: Outdoor unit (Cooling mode)............................ 142

[3] Location of leaks:

[4] Location of leaks: Outdoor unit (when heating)............................. 143

Extension piping or indoor units (when cooling) ...

Extension piping or indoor units (Heating mode)..

141

142

9 CHECK THE COMPOSITION OF THE REFRIGERANT

(PURY -P200·250YMF-C only).................................................................144

–1–

Safety precautions

Before installation and electric work

▲

Before installing the unit, make sure you read all the “Safety precautions”.

▲

The “Safety precautions” provide very important points regarding safety . Make sure you follow them.

▲

This equipment may not be applicable to EN61000-3-2: 1995 and EN61000-3-3: 1995.

▲

This equipment may have an adverse effect on equipment on the same electrical supply system.

▲

Please report to or take consent by the supply authority before connection to the system.

Symbols used in the text

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

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

Symbols used in the illustrations

: Indicates an action that must be avoided. : Indicates that important instructions must be followed. : Indicates a part which must be grounded. : Beware of electric shock (This symbol is displayed on the

main unit label.) <Color: Yellow>

Warning:

Carefully read the labels affixed to the main unit.

Warning:

• Use the specified cables for wiring. Make the connections

securely so that the outside force of the cable is not applied to the terminals.

- Inadequate connection and fastening may generate heat and cause a fire.

• Have all electric work done by a licensed electrician according to “Electric Facility Engineering Standard” and “Interior Wire Regulations”and the instructions given in this manual and always use a special circuit.

- If the power source capacity is inadequate or electric work is

performed improperly, electric shock and fire may result.

• Securely install the cover of control box and the panel.

- If the cover and panel are not installed properly, dust or water

may enter the outdoor unit and fire or electric shock may result.

• After completing service work, make sure that refrigerant gas is not leaking.

- If the refrigerant gas leaks and is exposed to a fan heater,

stove, oven, or other heat source, it may generate noxious gases.

• Do not reconstruct or change the settings of the protection devices.

- If the pressure switch, thermal switch, or other protection

device is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or

explosion may result.

–2–

1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

Caution

Do not use the existing refrigerant piping.

• The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.

Use refrigerant piping made of phosphorus deoxidized copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.

• Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)

• If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

Use a vacuum pump with a reverse flow check valve.

• The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

Do not use the following tools that have been used with conventional refrigerants. (Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment)

• If the conventional refrigerant and refrigerator oil are mixed in the R407C, the refrigerant may deteriorated.

• If water is mixed in the R407C, the refrigerator oil may deteriorate.

• Since R407C does not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it.

Do not use a charging cylinder.

• Using a charging cylinder may cause the refrigerant to deteriorate.

Be especially careful when managing the tools.

Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.

• The refrigerator oil will degrade if it is mixed with a large amount of mineral oil.

Use liquid refrigerant to seal the system.

• If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.

Do not use a refrigerant other than R407C.

• If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.

• If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.

If the refrigerant leaks, recover the refrigerant in the refrigerant cycle, then recharge the cycle with the specified amount of the liquid refrigerant indicated on the air conditioner.

• Since R407C is a nonazeotropic refrigerant, if additionally charged when the refrigerant leaked, the composition of the refrigerant in the refrigerant cycle will change and result in a drop in performance or abnormal stopping.

–3–

[1] Storage of Piping Material

(1) Storage location

Store the pipes to be used indoors. (Warehouse at site or owner’s warehouse) Storing them outdoors may cause dirt, waste, or water to infiltrate.

(2) Pipe sealing before storage

Both ends of the pipes should be sealed until immediately before brazing. Wrap elbows and T’s in plastic bags for storage.

* The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil (such as Suniso). Water

infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure. Piping materials must be stored with more care than with the conventional refrigerant pipes.

–4–

[2] Piping Machining

Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flange connections.

Use only the necessary minimum quantity of oil !

Reason :

1. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside.

Notes :

• Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure.

• Do not use oils other than ester oil, ether oil or alkylbenzene.

–5–

[3] Brazing

No changes from the conventional method, but special care is required so that foreign matter (ie. oxide scale, water, dirt, etc.) does not enter the refrigerant circuit.

Example : Inner state of brazed section

When non-oxide brazing was not used When non-oxide brazing was used

Items to be strictly observed :

1. Do not conduct refrigerant piping work outdoors on a rainy day.

2. Apply non-oxide brazing.

3. Use a brazing material (Bcup-3) which requires no flux when brazing between copper pipes or between a copper pipe and copper coupling.

4. If installed refrigerant pipes are not immediately connected to the equipment, then braze and seal both ends of them.

Reasons :

1. The new refrigerant oil is 10 times more hygroscopic than the conventional oil. The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil.

2. A flux generally contains chlorine. A residual flux in the refrigerant circuit may generate sludge.

Note :

• Commercially available antioxidants may have adverse effects on the equipment due to its residue, etc. When applying non-oxide brazing, use oxygen free nitrogen (OFN).

–6–

[4] Airtightness Test

No changes from the conventional method. Note that a refrigerant leakage detector for R22 cannot detect R407C leakage.

Halide torch R22 leakage detector

Items to be strictly observed :

1. Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment’s airtightness, taking temperature variations into account.

2. When investigating leakage locations using a refrigerant, be sure to use R407C.

3. Ensure that R407C is in a liquid state when charging.

Reasons :

1. Use of oxygen as the pressurized gas may cause an explosion.

2. Charging with R407C gas will lead the composition of the remaining refrigerant in the cylinder to change and this refrigerant can then not be used.

Note :

• A leakage detector for R407C is sold commercially and it should be purchased.

[5] Vacuuming

1. Vacuum pump with check valve A vacuum pump with a check valve is required to prevent the vacuum pump oil from flowing back into the refrigerant circuit when the vacuum pump power is turned off (power failure). It is also possible to attach a check valve to the actual vacuum pump afterwards.

2. Standard degree of vacuum for the vacuum pump Use a pump which reaches 0.5 Torr (500 MICRON) or below after 5 minutes of operation. In addition, be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil. If the vacuum pump is not properly maintained, the degree of vacuum may be too low.

3. Required accuracy of the vacuum gauge Use a vacuum gauge that can measure up to 5 Torr. Do not use a general gauge manifold since it cannot measure a vacuum of 5 Torr.

4. Evacuating time

• Evacuate the equipment for 1 hour after –755 mmHg (5 Torr) has been reached.

• After envacuating, leave the equipment for 1 hour and make sure that the vacuum is not lost.

5. Operating procedure when the vacuum pump is stopped In order to prevent a backflow of the vacuum pump oil, open the relief valve on the vacuum pump side or loosen the charge hose to drawn in air before stopping operation. The same operating procedure should be used when using a vacuum pump with a check valve.

–7–

[6] Charging of Refrigerant

R407C must be in a liquid state when charging, because it is a non-azeotropic refrigerant.

For a cylinder with a syphon attached For a cylinder without a syphon attached

Cylin-

der

Cylinder color identification R407C-Gray Charged with liquid refrigerant

R410A-Pink

Valve

der

Valve

Liquid

Reasons :

1. R407C is a mixture of 3 refrigerants, each with a different evaporation temperature. Therefore, if the equipment is charged with R407C gas, then the refrigerant whose evaporation temperature is closest to the outside temperature is charged first while the rest of refrigerants remain in the cylinder.

Note :

• In the case of a cylinder with a syphon, liquid R407C is charged without turning the cylinder up side down. Check the type of cylinder before charging.

[7] Dryer

1. Replace the dryer when the refrigerant circuit is opened (Ex. Change the compressor, full gas leakage). Be sure to replace the dryer with a CITY MULTI Series Y (For use with R407C).

If any other product is used, the unit will be damaged.

2. Opening the refrigerant circuit after changing to a new dryer is less than 1 hour. The replacement of the dryer should be the last operation performed.

–8–

2 COMPONENT OF EQUIPMENT

[1] Appearance of Components

Outdoor unit

• PURY-P400·500YMF-C

Fan motor

Heat exchanger(rear)

Propeller fan

Fan motor

Propeller fan

Heat exchanger(front)

4–way valve

CV block 1

SV block 1

CV block 2

SV block 2

Control box

4–way valveCS circuit

Drier

Compressor

P500 TYPEP400 TYPE

Accumulator

Compressor

–9–

Controller Box

FANCON board

(for MF3)

RELAY board

FANCON board

(for MF2)

Overload relay

(51C2)

Magnetic contactor (52C2)

SNB board

Choke coil (L2)

INV boardMAIN board

Diode stack (DS)

G/A board

Inteligent Power Module (IPM)

(52F)

Noise filter

(NP)

Y-C board

Magnetic contactor (52C1)Magnetic contactor

Capacitor (C2, C3) (Smoothing capacitor)

–10–

MAIN board

• PUHY / PURY

CNTR CNFC1

CNVCC4 Power source for control(5V)

CNS1 CNS2

CN40

CN41

CNVCC3 Power Source for control

1-2 30V 1-3 30V 4-6 12V 5-6 5V

CN51 Indication distance 3-4 Compressor ON/OFF 3-5 Trouble

CNRS3 Serial transmission to INV board

CN3D

CN20 Power supply

3 L1 1 N

SW3SW4 SW2 SWU2 SWU1

CN3S

CN3N

LD1 Service LED

SW1

–11–

INV board

CNVDC 1-4 DC-560V

CN15V2 Power supply for IPM control

CNR

CN52C Control for 52C

CNFAN Control for MF1

CNAC2 Power source

1 L2 3 N 5 G

SW1

CNRS2 Serial transmission to MAIN board

CNVCC4 Power supply (5V)

CNL2 Choke coil

CNVCC2 Power supply

1-2 30V, 1-3 30V 4-6 12V, 5-6 5V

CNDR2 Out put to G/A board

CNTH

CNACCT

–12–

FANCON board

CNFAN

G/A board

CNPOW

CNFC2

CNE CNDC1

CN15V1

CNDR1

CNIPM1

–13–

SNB board

Y -C board

–14–

BC controller

CNTR

CN02 M-NET transmission

CN03

CN12 Power supply

1 EARTH 3 N 5 L

SW4 SW2 SW1SW5

–15–

RELAY 10 board

RELA Y 4 board

–16–

[2] Refrigerant Circuit Diagram and Thermal Sensor

PURY-P400, 500YMF-C

CV7b

CV5b

CV3b

CV2b

CV6b

BV1

ST1

BV2

TH5

SP : Service port ACC : Accumulator

: Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer

SV Block 2

SV8

SV7

HEXf4

HEXb2

SV Block 1

CJ2

SV5

SV3

SV6

SV4

CV7a

TH7

63LS

HEXf3

HEXb1

TH6

ST15

HEXf2

CV4b

HEXf1

CV Block 2

ST14

ST13

ST12

ST11

CV5a

CV10a

CV9a

CV3a

CV2a

CV4a

CV8a

CV6a

Orifice

CV Block 1

21S4b

21S4a

SV4a

ST5

CJ1

ST2

SV6a

63HS

O/S

CP1

ST6

SV1

SV32

SV22

CP3a

CP3b

TH12

TH11

CV1b

CV1a

63H2

63H1

–17–

Comp2

CJ3

SLEV

Comp1

ST9

ST3

TH3

ST4

TH4

ST8

CP2 TH9

Drier

CS Circuit

TH2

SV22, 32: P500 only

CMB-P108, 1010, 1013, 1016V-FA

: Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer

Solenoid

valve block

TH15

SVM2

LEV3

TH12

TH16

LEV1

TH11

Check

valve block

PS3

SVM1

–18–

Gas/liquid

separator

PS1

CMB-P108V-FB

: Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer

Solenoid

valve block

TH22

TH25

LEV3a

Check

valve block

–19–

[3] Electrical Wiring Diagram

PURY-P400·500YMF-C

–20–

1 2 34

1 2 3

SVM1 SVM2

131415

101112

5 6

4 5 6

87 9

12 11 10

15 14 13

1 2 3

3 4

1 2 3

3 4

1 2 3

3 4

1 2 3

3 4

SV7B

SV8B

SV9B

SV10B

SV7A

SV8A

SV9A

SV10A

SV7C

SV8C

SV9C

SV10C

SV1B

SV1A

SV1C

SV2C

SV2A

SV2B

SV3C

SV3A

SV3B

SV4C

SV4A

SV4B

SV5B

SV5A

SV5C

SV6B

SV6A

SV6C

X60

X21

CN46

CN36

Power source

~220V~240V 50/60Hz

Transmission line

Shield wire

CONT.board

CN38

CNTR

CN50CN51

7654321123456

CN02

CN12

X30

X31

X32

X33

X10

X34

X12

X11

X35

DC 30V

6 54

3 2 1

6 54

3 2 1

LEV3 LEV1

CNP1

CNP3

12321

CN03

CN13

CN10

CN11

CN07 CN05

TH11

TH12

TH15

TH16

PS1

PS3

22V

TB02

CN26

CN27

CN28

CN29

CN30

CN31

TB01

220~240V

LEV1

7654321123456

CN35

TB01

RELAY4 Board

CN32

CN33

CN34

CN39

X14

X13

X36

X37 X15 X16

X18

X17

X38

X39 X19 X20

CN52CN53

57317531753175133 3

F01

250VAC

6.3A F

T8T9

T10

EARTH

Fuse AC250V 6.3A F

F01

Terminal

T1 ~ 10

SVM1, 2

Solenoid valve

TB02

TB01

Terminal block

(for Transmission)

Solenoid valve

Terminal block

(for power source)

Pressure sensor

Expansion valve

Thermistor sensor

Transformer

NameSymbol

SV1 ~ 10A

SV1 ~ 10B

SV1 ~ 10C

TH11, 12, 15, 16

LEV1, 3

PS1, 3

Note1:TB02 is terminal block for transmission.

Never connect power line to it.

Symbol explanation

CMB-P108·1010V-FA

–21–

Power source

TB01TB01

~220V~240V 50/60Hz

SVM2

SVM1

SV11B

SV11A

SV11C

SV16C

SV16A

SV16B

SV15C

SV15A

SV15B

SV14C

SV14A

SV14B

SV13C

SV13A

SV13B

SV12C

SV12A

SV12B

131415

101112

5 6

4 5 6

87 9

12 11 10

15 14 13

1 2 3

SV7B

SV8B

SV9B

SV10B

SV7A

SV8A

SV9A

SV10A

SV7C

SV8C

SV9C

SV10C

SV1B

SV1A

SV1C

SV2C

SV2A

SV2B

SV3C

SV3A

SV3B

SV4C

SV4A

SV4B

SV5B

SV5A

SV5C

SV6B

SV6A

SV6C

CN36

CN46

X21

X60

Transmission line

Shield wire

CNTR

220~240V

CN35

CN31

CN30

CN29

CN28

CN27

CN26

CN38

TB02

22V

PS3

PS1

TH16

TH15

TH12

TH11

CN32

7531

CN33

CN34

CN05CN07

CN11

CN10

CN13

CN02

CN03

12321

CNP3

CNP1

LEV1LEV3

DC 30V

X35

X11

X12

X34

X10

X33

X32

X31

X30

X14

X13

X36

X37 X15 X16

CNVCC1

X38

X39

X17

X19

X18

X20

X45

X42

X43

X40

X44

X41

CN40

CN41

CNOUT4

CNOUT2

X48

X51

X47

X46

X50

X49

CN43

CN42

CN44

CN45

X55

X56

X52

X53

X57

X54

CNVCC2

753175317531

CNOUT1

CNOUT3

CN12

CN39

CONT.board

RELAY10 board

F01

250VAC

6.3A F

EARTH

T16

T15

T14

T13

T12

T11

T8T9

T10

Terminal

Solenoid valve

SVM1, 2

PS1, 3

SV1

16A

SV1

16B

SV1

16C

Fuse AC250V 6.3A FF01

Symbol

Name

Pressure sensor

Terminal block

(for power source)

Solenoid valve

Terminal block

(for Transmission)

TB01

TB02

Symbol explanation

Transformer

Thermistor sensor

Expansion valve

LEV1, 3

TH11, 12, 15, 16

Note1:TB02 is terminal block for transmission.

Never connect power line to it.

CMB-P1013·1016V-FA

–22–

131415

101112

5 6

4 5 6

87 9

12 11 10

15 14 13

1 2 3 4

3 4

1 2 3

3 4

SV7B

SV8B

SV7A

SV8A

SV7C

SV8C

SV1B

SV1A

SV1C

SV2C

SV2A

SV2B

SV3C

SV3A

SV3B

SV4C

SV4A

SV4B

SV5B

SV5A

SV5C

SV6B

SV6A

SV6C

Power source

~220V~240V 50/60Hz

Transmission line

Shield wire

CONT.board

CN38

CNTR

CN50

7654321

CN02

CN12

X30

X31

X32

X33

X10

X34

X12

X11

X35

DC 30V

6 54

3 2 1

LEV3

12321

CN03

CN13

CN10

CN11

CN07

TH12

TH15

22V

TB02

CN26

CN27

CN28

CN29

CN30

CN31

TB01

220~240V

7654321

TB01

RELAY4 Board

CN32

CN33

CN39

X14

X13

X36

X37 X15 X16

CN52

75317513

F01

250VAC

6.3A F

EARTH

F01

Fuse AC250V 6.3A F

Terminal

TB02

TB01

Terminal block

(for Transmission)

Solenoid valve

Terminal block

(for power source)

Expansion valve

Thermistor sensor

Transformer

Name

Symbol

SV1

TH12, 15

LEV3

Note1:TB02 is terminal block for transmission.

Never connect power line to it.

Symbol explanation

CMB-P108V-FB

–23–

[4] Standard Operation Data

1 Cooling operation

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch Refrigerant volume

Total current

Voltage

Outdoor unit

Indoor unit

Indoor Outdoor

Quantity

Quantity in operation

Model Main pipe

Branch pipe

Total piping length

Outdoor unit

DB/WB

Set

PURY-P400YMF-C PURY-P500YMF-C

27.0/19 27.0/19

35.0/24.0 35.0/24.0

55 55

100 100 100 50 50 125 125 125 100 25

10 10 10 10 10 10 10 10 10 10

55 55

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

27.1 29.2

27.6/26.2/25.2 34.6/32.8/31.7

380/400/415 380/400/415

360 360 360 340 340 410 410 410 360 280

BC controller (1, 3)

LEV opening

Oil return (SLEV)

High pressure/Low pressure (after O/S) (before MA)

Pressure

controller

Outdoor unit

Sectional temperature

High/Intermediate

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp) (No.1/No.2)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp No.1/No.2)

Inlet Outlet

Upper (TH4)

Lower (TH3)

Pulse

kg/cm2G

(MPa)

°C

2000 300 2000 350

200 344

21.5/4.4 21.5/4.3

(2.11/0.43) (2.11/0.42)

20.5/20.5 20.5/20.5

(2.01/2.01) (2.01/2.01)

92/102 97/102

6/12 12/12

60/51 65/50

Indoor unit

CS circuit (TH9)

Circulating configuration (αOC) LEV inlet Heat exchanger outlet

0.23 26 12

–24–

2 Heating operation

Items

Outdoor unit

PURY-P400YMF-C PURY-P500YMF-C

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch Refrigerant volume

Total current

Voltage

Outdoor unit

Indoor unit

BC controller (1, 3)

Oil return (SLEV)

LEV opening

Indoor Outdoor

Quantity

Quantity in operation

Model Main pipe

Branch pipe

Total piping length

DB/WB

Set

Pulse

20.0/- 20.0/-

7.0/6.0 7.0/6.0

55 55

100 100 100 50 50 125 125 125 100 25

10 10 10 10 10 10 10 10 10 10

55 55

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

27.1 29.2

25.6/24.3/23.4 32.1/30.5/29.4

380/400/415 380/400/415

600 600 600 450 450 650 650 650 600 350

60 1400 60 1600

122

High pressure/Low pressure (after O/S) (before MA)

Pressure

controller

Outdoor unit

Sectional temperature

High/Intermediate

Discharge (TH11/TH12)

Heat exchanger inlet (TH5)

Accumulator

Suction (Comp) (No.1/No.2)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp No.1/No.2)

CS circuit (TH9)

Circulating configuration (αOC)

Inlet Outlet

Upper (TH4)

Lower (TH3)

kg/cm2G

(MPa)

°C

21.5/3.6 21.5/3.2

(2.11/0.35) (2.11/0.31)

20.5/17.5 20.5/17.5

(2.01/1.72) (2.01/1.72)

88/93 88/93

– 3 – 1

– 6 – 7

– 5/2 – 5/0

– 10

– 6

43/45 40/33

0.28

Indoor unit

Heat exchanger inlet

LEV inlet

81 34

–25–

[5] Function of Dip SW and Rotary SW

(1) Outdoor unit PURY-P400·500YMF-C. 1 Variable capacity unit

MAIN board

Switch Function

SWU 1 ~ 2

SW1

SW2

SW3

SW4

Unit Address Setting For self diagnosis/

1 ~ 8

operation monitoring

9 ~ 10

Centralized Control

Switch Deletion of connection

information.

Deletion of error history.

• Adjustment of Refriger-

ant Volume

• Ignore liquid level errors 5 6

Forced defrosting

Reset of the time the CS

circuit is closed.

SW3-2 Function Valid/

Invalid Indoor Unit Test Operation

Defrosting start tempera-

ture . Defrosting end tempera-

ture.

Target low-pressure

change Pump Down Function

Target high-pressure

change 8 9

SW4-2 Function valid/

Invalid

Configuration compensa-

tion value 3 4 5 6 7 8 9

Models

Function According to Switch Operation Switch Set Timing When Off When On When Off When On

Set on 51 ~ 100 with the rotary switch.*2

Centralized control not connected. Storing of refrigeration system connection information. Store IC•OC error history.

Ordinary control

When the CS circuit is closed, that time is totaled.

SW3-2 Function Invalid

Stop all indoor units.

– 8°C

7°C

Ordinary control

Ordinary control Ordinary control

Model 400

SW4-2 Function invalid

Changes as shown below by on → off change 0 %→3 %→6 %→9 %→12 %→ – 6 %→ – 3 %→0 %

Before power is turned on.

Refer to LED monitor display on the outdoor board.

Centralized control connected. Deletion of refrigeration system connection information. Erase IC•OC error history .

• Refrigerant volume

adjustment operation.

• Ignore liquid level errors

Start forced defrosting.

Timer Reset

SW3-2 Function Valid

All indoor units test run ON.

2deg lower than normal

Pump Down Operation High pressure / 1.5 ~ 2.5 K higher than normal

SW4-2 Function valid

– 10°C

12°C

Model 500

Before power is turned on.

During normal operation when power is on. During normal operation when power is on.

During normal operation when power is on.

During normal operation when power is on. When SW3-1 is ON after power is turned on. During normal operation when power is on. During normal operation when power is on. (Except during defrosting) During normal operation when power is on. While the compressor is stopped. During normal operation when power is on.

When switching on the power. When switching on the power.

When SW4-1 is ON

Invalid 2 hours after compressor starts.

10 minutes or more after compressor starts.

Note 1: Factory setting is SWU 1 to 2 = 00, SW3 - 10 = set by model. All other switches are set to OFF. Note 2: If the address is set from 01 to 50, it automatically becomes 100.

–26–

(2) Indoor unit

DIP SW1, 3

Switch SW name

Room temp. sensor position

Clogged filter detect.

Filter duration

OA intake

Remote display select.

SW1

SW3

Humidifier control

Heating thermo. OFF airflow

Power failure automatic

return Power source start/stop

Model selection

Louver

Vane

Vane swing function

Vane horizontal angle

Vane angle set for cooling

Cooling capacity saving for PKFY-P. VAM, effective/ineffective

7 8

Heating 4deg up

Operation by SW

OFF ON OFF ON

Indoor unit inlet

None

100h

Ineffective Fan output display At stationary heating

Very low speed

SW1-7 setting

Ineffective

Heat pump

None

None None

1st setting

Down blow B, C

–

Effective

– –

Built in remote controller

Provided

2500h

Effective

Thermo. ON signal display

Always at heat.

Low speed

Set airflow

Effective

Cool.only

Provided

Provided Provided

2nd setting

Horizontal

–

Ineffective

– –

Switch set timing

At unit stopping

(at remote

controller OFF)

Remarks

Always ineffective for PKFY-P.VAM

Not provided for PKFY-P.VAM Provided for PLFY-P.VGM (ON) setting

Always down blow B,C for PKFY-P.VAM Horizontal (ON) setting for PLFY-P.VLMD

Ineffective (ON) setting for floor standing

Note 1: The shaded part indicates the setting at factory shipment. (For the SW not being shaded, refer to the

table below.)

Switch

SW1

SW3

Model

3 6 7 3 4 6 8

VBM-A

OFF OFF

OFF

PLFY-P

VLMD-A

OFF

OFFONON

VKM-A

VML-A VMH-A

OFF ON

OFF

PEFY-P 20~80VMM-A

OFF

OFF ON

PDFY-P

100~140VMM-A

OFF OFF

OFF

VM-A

PFFY-P PCFY-P

VLRM-A, VLEM-A

OFF

ON OFF

PKFY-P

VGM-AONVAM-A VGM-A

OFF

ON OFF ON

Note 2: The DipSW setting is only effective during unit stopping (remote controller OFF) for SW1, 2, 3 and 4 commonly

and the power source is not required to reset.)

3: When both SW1-7 and SW1-8 are being set to ON, the fan stops at the heating thermostat of OFF.

Setting of DIP SW2

Model P20 P25 P32 P40 P50 P63 Capacity (model name) code

SW2 setting

45 681013

OFF

Model P71 P80 P100 P125 P140 P200 P250 Capacity (model name) code

SW2 setting

14 16 20 25 28 40 50

OFF

–27–

Setting of DIP SW4 Setting of DIP SW5

Model Circuit board used

PMFY-P-VBM-A PLFY-P-VLMD-A PDFY-P20 ~ 80VM-A PLFY-P40 ~ 63VKM-A PLFY-P80 ~ 125VKM-A PCFY-P-VGM-A PKFY-P-VGM-A PKFY-P-VAM-A PEFY-P20 ~ 80VMM-A PFFY -P-VLEM-A, P-VLRM-A PEFY-P20 ~ 32VML-A PEFY-P40 ~ 140VMH-A PEHY-P200·250VMH-A PDFY-P100·125VM-A PEFY-P100 ~ 140VMM-A

Phase control

Relay selection

1234

ON OFF ON OFF

––––

ON OFF ON OFF

OFF OFF OFF ON

ON OFF OFF ON OFF ON OFF ON OFF OFF ON ON

––––

ON ON OFF OFF OFF OFF OFF –

ON ON ON – OFF OFF OFF –

ON OFF OFF – OFF OFF ON –

ON ON ON OFF

SW4

220V 240V

Switch Function Operation by switch Switch set timing

(PLFY-P-VKM-A) (PCFY-P-VGM-A)

Ceiling height 3 3.5 m 2 2.8 m 1 2.3 m

Always after powering

SWA

Ceiling height setting

3 2 1

*The ceiling

height is changed by SWB setting.

3 2 1

SWA

SWB

SWC

External static pressure setting

For options

Setting of air outlet opening

Airflow control

(PDFY-P20 ~ 80VM-A, PEFY-P20 ~ 80VMM-A)

3 2 1

For other models, change the setting of static pressure by replacing the connector.

100Pa

50Pa 30Pa

(PLFY-P-VLMD-A)

*As this switch is used by interlocking with SWC,

2 1

(PLFY-P-VKM-A)

refer to the item of SWC for detail.

2-way 3-way 4-way

SWA

SWB

123

2-way 3.5 m 3.8 m 3.8 m 3-way 3.0 m 3.3 m 3.5 m 4-way 2.7 m 3.0 m 3.5 m

(PLFY-P-VKM-A, PCFY-P-VGM-A, PKFY-P-VGM-A, PDFY-P-VM-A)

Option

Standard

*Set to the option to install the high efficiency

filter

Always after powering

–28–

3 TEST RUN

[1] Before Test Run

(1) Check points before test run

1 Neither refrigerant leak nor loose power source/ transmission lines should be found.

2 Confirm that the resistance between the power source terminal block and the ground exceeds 2MΩ by measur-

ing it with a DC 500 V megger. Do not run if it is lower than 2MΩ. Note: Never apply the megger to the MAIN board. If applied, the MAIN board will be broken.

3 Confirm that the Ball valve at gas and liquid, oil balance sides are fully opened.

Note: Certainly close the cap.

4 Be sure that the crankcase heater has been powered by turning the main power source on at least 12 hours

before starting the test run. The shorter powering time causes compressor trouble.

5 If any of the power supply wires (L1, L2, L3, N,

Please exercise caution.

6 A transmission booster (RP) is required when the number of connected indoor unit models in a cooling system

exceeds the number of models specified in the chart below. Note: The maximum number of units that can be controlled is determined by the indoor unit model, the type of

remote controller and their capabilities.

.) are mistakenly connected, it is possible to damage the unit.

Remote controller type (*1) Capability of the

connected indoor units

The number of indoor units and the total number of remote controllers is displayed within the parenthesis ( ).

(*1) If even one unit that is higher than 200 exists in the cooling system, the maximum capacity will be “200 or

higher”.

* Please refer to the installation manual for more details. * Before turning power on to the outdoor unit, first turn on the transmission booster. (If the outdoor unit are mistakenly

turned on first, turn on the transmission booster and then reset the outdoor unit power.)

(2) Caution at inverter check

Because the inverter power portion in outdoor unit electrical part box have a lot of high voltage portion, be sure to follow the instructions shown below.

During energizing power source, never touch inverter power portion because high voltage (approx. 580 V) is applied to inverter power portion.

Number of connected indoor units that

can be connected without a RP.

200 or lower

200 or higher

Remote controller PAR-F 25MA

Prior to Ver. E After Ver. F

16 (32) 20 (40) 16 (32) 16 (32)

When checking,

Shut off main power source, and check it with tester, etc.

Allow 10 minutes after shutting off main power source.

Open the MAIN board mounting panel, and check whether voltage of both ends of electrolytic capacitor is 20 V or less.

–29–

(3) Check points for test run when mounting options

Built-in optional parts Content of test run Check point Result

Mounting of drain water lifting-up mechanism

Release connector of pump circuit,

check error detection by pouring water into drain pan water inlet.

Local remote controller displays code No. “2503”, and the mechanism stops.

No overflow from drain pan.

After that, connect connector of

circuit. Check pump operations and drainage

status in cooling (test run) mode.

Mounting of permeable film humidifier

(4) Attention for mounting drain water lifting-up mechanism

Work Content of test run Check point Result

Disassembling and assembling of drain water lifting-up mechanism

Check humidifier operations and water supply status in heating (test run) mode.

Lead wire from control box not

damaged. Rubber cap properly inserted to drain

water outlet of drain pan? Insulation pipe of gas and liquid pipes

dealt with as shown in the right figure?

Drain water comes out by operations of drain pump.

Sound of pump operations is heard, and drain water comes out.

No water leak from connecting portions of each water piping.

Water is supplied to water supply tank, and float switch is operating.

Insulation pipe

Mounting of float switch

Electric wiring

Drain pan and piping cover mounted

without gap? Drain pan hooked on cut projection of

the mechanism?

Float switch installed without contacting with drain pan?

No mistakes in wiring?

Connectors connected securely and

tightly? No tension on lead wire when sliding

control box?

No gap

Float switch moves smoothly.

Float switch is mounted on mount-

ing board straight without deformation.

Float switch does not contact with

copper pipe.

Wiring procedure is exactly followed. Connector portion is tightly hooked.

–30–

(5) Check points for system structure

In the case of the PURY-P400·500 YMF-C Check points from installation work to test run.

Classification Portion Check item Trouble

Installation and piping

Power source wiring

Instruction for selecting combination of outdoor unit, and

indoor unit followed? (Maximum number of indoor units which can be connected, connecting model name, and total capacity.)

Follow limitation of refrigerant piping length? For example, 100 m or less (total length: 220 m) at the farthest.

Connecting piping size of branch piping correct?

Branch pipe properly selected?

Refrigerant piping diameter correct?

Refrigerant leak generated at connection?

Insulation work for piping properly done?

Specified amount of refrigerant replenished?

Pitch and insulation work for drain piping properly done? Specified switch capacity and wiring diameter of main

power source used?

Proper grounding work done on outdoor unit?

Not operate.

Not cool (at cooling). Not heat (at heating).

Not cool, not heat, error stop. Condensation drip in piping. Not cool, not heat, error stop.

Water leak, condensation drip in drain piping.

Error stop, not operate.

Electric shock.

The phases of the L line (L1, L2, L3) correct?

L line and N line connected correct?

Error stop, not operate.

Some electric parts will be damaged.

–31–

TIMER SET

STAND BY DEFROST

ERROR CODE

D A I L Y

AUTO OFF

CENTRALLY CONTROLLED

CLOCK

REMAINDER

ON OFF

˚C

1Hr.

NOT AVAILABLE

˚C

CHECK MODE

FILTER

CHECK

TEST RUN

LIMIT TEMP.

ON/OFF

TEMP

FILTER

CHECK TEST

ON OFF

CLOCK

PAR-F27MEA

TIMER SET

1Hr.

˚C

ON OFF

CLOCK

REMAINDER

ERROR CODE

˚C

ON OFF

CLOCK

NOT AVAILABLE

CHECK MODE

LIMIT TEMP.

ON/OFF

FILTER

TEST RUN

CHECK TEST

FILTER

CENTRALLY CONTROLLED

D A I L Y

AUTO OFF

CHECK

STAND BY DEFROST

TEMP

2 31

PAR-F27MEA

Classification Transmission

line

System set

Before starting

Portion Check item

Limitation of transmission line length followed? For example, 200m or less (total length : 500m) at the farthest.

2 1.25mm2 or more transmission line used?

(Remote controller 10m or less 0.75mm

)

3 2-core cable used for transmission line?

Transmission line apart from power source line by 5cm or more?

5 One refrigerant system per transmission line?

The short circuit connector is changed form CN41 to

CN40 on the MAIN board when the system is centralized control? (Just one outdoor unit. Not all outdoor units.)

7 • No connection trouble in transmission line? 8 Connection of wrong remote controller line terminals?

• MA Remote controller : TB15

• M-NET Remote controller : TB5

Address setting properly done? (M-NET Remote

controller, indoor unit, BC controller and outdoor unit.) Setting of address No. done when shutting off power

source? Address numbers not duplicated?

Turned on SW3-8 on indoor unit circuit board when

mounting room thermistor sensor?

Refrigerant piping ball valve (Liquid pressure pipe, gas

pressure pipe) opened?

Turn on power source 12 hours before starting operations?

–32–

Trouble

Erroneous operation, error stop.

Error stop in case multiple-core cable is used.

Erroneous operation, error stop. Not operate. Not operate.

Error stop or not operate. Never finish the initial mode.

Error stop or not operate.

Can not be properly set with power source turned on.

Not operate. Set temperature not obtained at

heating operations (Thermostat stop is difficult)

Error stop.

Error stop, compressor trouble.

[2] Test Run Method

Operation procedure

Turn on universal power supply at least 12 hours before starting → Displaying “HO” on display panel for about two

minutes

2 Press

3 Press

5 Press

6 Press or button to change wind → Make sure that horizontal or downward blow is adjustable.

7 Make sure that indoor unit fans operate normally 8 Make sure that interlocking devices such as ventilator operate normally if any

9 Press

Note 1: If check code is displayed on remote controller or remote controller does not operate normally.

TEST RUN

Press warm or cold air is blowing out

ON/OFF

2: Test run automatically stops operating after two hours by activation of timer set to two hours. 3: During test run, test run remaining time is displayed on time display section. 4: During test run, temperature of liquid pipe in indoor unit is displayed on remote controller room temperature

display section.

5: When pressing

controller. However, it is not a malfunction.

6: When pressing

remote controller. However, it is not a malfunction.

button twice → Displaying “TEST RUN’’ on display panel

selection button → Make sure that air is blowing out

select button to change from cooling to heating operation, and vice versa → Make sure that

adjust button → Make sure that air blow is changed

button to cancel test run → Stop operation

adjust button, depending on the model, “NOT A V AILABLE” may be displayed on remote

or button, depending on the model, “NOT A V AILABLE” may be displayed on

–33–

GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET REMOTE CONTROLLER

(1) Switch function

• The switch operation to register with the remote controller is shown below:

1Hr

NOT AVAILABLE

˚C

ON/OFF

C Switch to assign

indoor unit address

F Delete switch G Registered mode

STAND BY DEFROST

CENTRALLY CONTROLLED

D A I L Y

AUTO OFF

CHECK

˚C

TEMP

ON OFF

CLOCK

REMAINDER

ERROR CODE

ON OFF

CLOCK

selector switch

E Confirmation switch

PAR-F27MEA

TIMER SET

H Switch to assign inter-

locked unit address

Name Name of actual switch Description

Registration/ordinary mode selection switch

Symbol

of switch

A + B

FILTER

This switch selects the ordinary mode or registered mode (ordinary mode represents that to operate indoor units). * To select the registered mode, press the

switch continuously for over 2 seconds under stopping state. [Note] The registered mode can not be obtained for a while after powering. Pressing the

FILTER

CONTROLLED”.

Switch to assign indoor unit address

of TEMP

This switch assigns the unit address for “INDOOR UNIT ADDRESS NO.”

FILTER

CHECK MODE

TEST RUN

LIMIT TEMP.

FILTER

CHECK TEST

Registration/ ordinary mode selector switch

D Registration switch

Registration/ ordinary mode selector switch

FILTER

switch displays “CENTRALLY

Registration switch

Confirmation switch

Delete switch

Registered mode selector switch

Switch to assign interlocked unit address

TEST RUN

This switch is used for group/interlocked registration.

This switch is used to retrieve/identify the content of group and interlocked (connection information) registered.

CLOCK → ON → OFF

This switch is used to retrieve/identify the content of group and interlocked (connection information) registered.

This switch selects the case to register indoor units as group (group setting mode) or that as interlocked (interlocked setting mode). *The unit address is shown at one spot for the group setting mode while at two spots for the interlocked setting mode.

of TIMER SET

This switch assigns the unit address of “OA UNIT ADDRESS NO.”

–34–

(2) Attribute display of unit

• At the group registration and the confirmation/deletion of registration/connection information, the type (attribute) of the unit is displayed with two English characters.

Display Type (Attribute) of unit/controller

Indoor unit connectable to remote controller Outdoor unit BC controller (Master) BC controller (Slave)

Local remote controller System controller (MJ)

[Description of registration/deletion/retrieval]

• The items of operation to be performed by the remote controller are given below. Please see the relating paragraph for detail.

1 Group registration of indoor unit

• The group of the indoor units and operating remote controller is registered.

• It is usually used for the group operation of indoor units with different refrigerant system.

2 Retrieval/identification of group registration information of indoor units

• The address of the registered indoor units in group is retrieved (identified).

3 Retrieval/identification of registration information

• The connection information of any unit (indoor/outdoor units, remote controller or the like) is retrieved (identified).

4 Deletion of group registration information of indoor units

• The registration of the indoor units under group registration is released (deleted).

5 Deletion of the address not existing

• This operation is to be conducted when “6607” error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of the group composition.

Caution:

When MELANS (MJ-103MTRA for example) is being connected, do not conduct the group/pair registration using the remote controller. The group/pair registration should be conducted by MELANS. (For detail, refer to the instruction exclusively prepared for MELANS.)

–35–

(3) Group registration of indoor unit

1) Registration method

• Group registration of indoor unit ........................................................................ 1

The indoor unit to be controlled by a remote controller is registered on the remote controller.

[Registration procedure]

1 With the remote controller under stopping or at the display of “HO”, continuously press the

(A + B) at the same time for 2 seconds to change to the registration mode. (See the figure below.)

2 Assign the indoor unit address to “INDOOR UNIT ADDRESS NO.” by operating the

adjustment) (C). Then press the

TEST RUN

switch (D) to register. In the figure below , the “INDOOR UNIT ADDRESS NO.” is being set

to 001.

3 After completing the registration, press the

FILTER

+ switch (A + B) at the same time for 2 seconds to

change to the original ordinary mode (with the remote controller under stopping).

Ordinary mode

• Remote controller under stopping • “HO” under displaying

FILTER

+ switch

(Room temperature

˚C

INDOOR UNIT ADDRESS NO

Group setting mode

˚C

TEMP

PAR-F27MEA

TIMER SET

ERROR CODE OA UNIT ADDRESS NO

ON OFF

CLOCK

ON/OFF

CHECK TEST

FILTER

2 + 3

˚C

INDOOR UNIT

ERROR CODE

ADDRESS NO

OA UNIT ADDRESS NO

• Registration complete

▲

Indicates the type of unit (Indoor unit in this case)

˚C

ERROR CODE OA UNIT ADDRESS NO

• Registration error

▼

“88” flickers indicating registration error. (when the indoor unit registered is not existing)

˚C

ERROR CODE OA UNIT ADDRESS NO

2 Assign the

address (C)

System example

Remote controller

1 Change to the

registration mode (A + B)

Indoor units

3 Press the

registration switch (D)

Group

• Confirm the indoor unit address No.

• Confirm the connection of the transmission line.

–36–

2) Method of retrieval/confirmation

• Retrieval/confirmation of group registration information on indoor unit .............. 2

The address of the indoor unit being registered on the remote controller is displayed.

[Operation procedure]

1 With the remote controller under stopping or at the display of “HO”, continuously press the

FILTER

+ B) at the same time for 2 seconds to change to the registration mode.

2 In order to confirm the indoor unit address already registered, press

switch (E). (See figure below.) When the group

of plural sets is registered, the addresses will be displayed in order at each pressing of switch (E).

3 After completing the registration, continuously press the

FILTER

+ switch (A + B) at the same time for 2

seconds to change to the original ordinary mode (with the remote controller under stopping).

• Registered

+ switch (A

PAR-F27MEA

TEMP

TIMER SET

CLOCK

ON OFF

ON/OFF

CHECK TEST

FILTER

▲

Indicates the type of unit (Indoor unit in this case)

• No registration.

˚C

ERROR CODE OA UNIT ADDRESS NO

▼

˚C

ERROR CODE OA UNIT ADDRESS NO

Note: Only one address will be displayed

1 Press the switch for confirmation (E)

• Retrieval/confirmation of registration information ................................................ 3

The registered information on a certain unit (indoor unit, outdoor unit, remote controller or the like) is displayed.

[Operation procedure]

1 With the remote controller under stopping or at the display of “HO”, continuously press the

+ B) at the same time for 2 seconds to change to the registration mode.

2 Operate

switch (G) for the interlocked setting mode. (See figure below.)

3 Assign the unit address of which registration information is desired to confirm with the (TIMER SET) switch

(H). Then press the

switch (E) to display it on the remote controller. (See figure below.)

Each pressing of switch (E) changes the display of registered content. (See figure below.)

4 After completing the retrieval/confirmation, continuously press the

FILTER

for 2 seconds to change to the original ordinary mode (with the remote controller under stopping).

when the registration is one even the switch is how often pressed

FILTER

+ switch (A

+ switch (A + B) at the same time

–37–

• Registered

(Alternative

display)

PAR-F27MEA

TEMP

TIMER SET

CLOCK

ON OFF

ON/OFF

FILTER

CHECK TEST

▲

1 + 2

2 Press the switch for

confirmation (E)

1 Set the address

• No registration

▼

3) Method of deletion

• Deletion of group registration information of indoor unit ...................................... 4

(Alternative

display)

* Same display will appear when

the unit of “007” is not existing.

˚C

ERROR CODE OA UNIT ADDRESS NO

[Operation procedure]

1 With the remote controller under stopping or at the display of “HO”, continuously press the

FILTER

switch (A + B) at the same time for 2 seconds to change to the registration mode.

2 Press the switch (E) to display the indoor unit address registered. (As same as 2) 3 In order to delete the registered indoor unit being displayed on the remote controller, press the

CLOCK → ON → OFF

two times continuously. At completion of the deletion, the attribute display section will be shown as “ – – “. (See figure below.) Note: Completing the deletion of all indoor units registered on the remote controller returns to “HO” display.

4 After completing the registration, continuously press the

FILTER

+ switch (A + B) at the same time for 2

seconds to change to the original ordinary mode (with the remote controller under stopping).

• Deletion completed

▲

˚C

INDOOR UNIT ADDRESS NO

“– –” indicates the deletion completed.

• Deletion completed

▼

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

PAR-F27MEA

TEMP

TIMER SET

CLOCK

ON OFF

ON/OFF

CHECK TEST

FILTER

In case of group registration with other indoor unit is existing

In case of no group registration with other indoor unit is existing

(F) switch

1 Press the switch for confirmation (F)

twice continuously.

–38–

4) Deletion of information on address not existing

• Deletion of information on address not existing ................................................... 5

This operation is to be conducted when “6607” error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of group composition, and the address not existing will be deleted. Note: The connection information (connection between indoor unit and outdoor unit) on the refrigerant system can

not be deleted. An example to delete the system controller of “250” from the indoor unit of “007” is shown below.

[Operation procedure]

1 With the remote controller under stopping or at the display of “HO”, continuously press the

FILTER

+ switch (A

+ B) at the same time for 2 seconds to change to the registration mode.

2 Operate

switch (G) for the interlocked setting mode ( ii ). (See the figure below.)

3 Assign the unit address existing to “OA UNIT ADDRESS No.” with the (TIMER SET) switch (H), and press

switch (E) to call the address to be deleted. (See the figure below.) As the error display on the remote controller is usually transmitted from the indoor unit, “OA UNIT ADDRESS No.” is used as the address of the indoor unit.

4 Press the 5 After completing the deletion, continuously press the

CLOCK → ON → OFF

switch (F) twice. (See the figure below.)

FILTER

+ switch (A + B) at the same time for 2 seconds

to return to the original ordinary mode (with the remote controller under stopping).

• Deletion completed

When both indoor

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

(Alternative

display)

unit and interlocked unit addresses are existing

▲

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

(Alternative

display)

INDOOR UNIT ADDRESS NO

PAR-F27MEA

2 Press the switch for

confirmation (E)

˚C

ERROR CODE OA UNIT ADDRESS NO

▲

1 + 2

TEMP

ON OFF

CLOCK

TIMER SET

3 Press the deletion switch (F) twice

1 Set the address (H)

ON/OFF

CHECK TEST

FILTER

Deletion of address not existing

˚C

INDOOR UNIT ADDRESS NO

• Deletion completed

˚C

INDOOR UNIT ADDRESS NO

(Alternative

˚C

▼

ERROR CODE OA UNIT ADDRESS NO

display)

ERROR CODE OA UNIT ADDRESS NO

–39–

5 CONTROL

[1] Control of Outdoor Unit [1]- 1 PURY -P400·500 YMF-C

(1) Initial processing

• When turning on power source, initial processing of microcomputer is given top priority.

• During initial processing, control processing corresponding to operation signal is suspended. The control processing is resumed after initial processing is completed. (Initial processing: Data processing in microcomputer and initial setting of each LEV opening, requiring approx. 3 minutes at the maximum.)

(2) Control at staring

• For 3 minutes after starting, 60 Hz is the upper frequency limit. (When only No. 1 compressor is operating.)

• 75 Hz is the upper limit within 2 hours after the power supply has been turned ON and for the 30 minutes after the compressor has started operation.

• Normal control is performed after the initial start mode (described later) has been completed.

(3) Compressor capacity control

• Variable capacitor compressor is performed by the variable capacity compressor (No. 1: inverter motor) and constant capacity compressor (No. 2: It has capacity control switching).

• In response to the required performance, the number of compressors operating, the switching of capacity control and the frequency of the variable capacitor compressor is controlled so that the evaporation temperature is between – 2 and – 6°C in cooling mode and that the condensation temperature is 49°C in heating mode.

• The fluctuation of the frequency of the variable capacitor compressor is as follows. It is performed at 2 Hz per second. 20 to 100 Hz (TH6 > 20°C and in cooling mode, or in heating mode) 30 to 100 Hz (TH6 < 20°C and in cooling mode)

1) No. 2 compressor operation, stopping and full-load/un-load switching

1 Switching from stopping to operation of No. 2 compressor.

When the required performance cannot be obtained by only No. 1 compressor, the No. 2 compressor will be started. (The No. 2 compressor will be started in un-load operation.)

• After the No. 1 compressor has reached 100 Hz, the No. 2 compressor stops → un-load or un-load → full-load.

2 Switching from operation to stopping of No. 2 compressor.

When the required performance is exceeded when the two compressors, No. 1 and No. 2, are operating, the No. 2 compressor is stopped or performed in un-load operation.

3 Switching from un-load to full-load of No. 2 compressor

When the required performance cannot be obtained by the No. 1 compressor and the No. 2 compressor operating in un-load, the No. 2 compressor will be switched to full-load operation.

4 Switching from full-load to un-load of No. 2 compressor

When the required performance is exceeded when the two compressors, No.1 and No. 2 operating in full-load, the No 2 compressor will be switched to un-load operation.

2) Pressure control The upper limit value for the high pressure (Pd) has been set for each frequency. When this value is exceeded, the frequency is reduced every 30 seconds.

3) Discharge temperature control The discharge temperature of the compressor (Td) is monitored during the operation. If the upper limit is exceeded, the frequency is reduced by 5 Hz.

• Control is performed every 30 seconds after 30 seconds at the compressor starting.

–40–

• The operating temperature is 124°C (No. 1 compressor) or 115°C (No. 2 compressor).

4) Compressor frequency control 1 Ordinary control

The ordinary control is performed after the following times have passed.

• 30 seconds after the start of the compressor or 30 seconds after the completion of defrosting.

• 30 seconds after frequency control operation by means off the discharge temperature or the high pressure.

2 Amount of frequency fluctuation

The amount of frequency fluctuation is controlled in response to the evaporation temperature (Te) and the condensation temperature (Tc) so that it will reach the target values.

3 Frequency control back-up by the bypass valve

Frequency control is backed-up by the turning on (opening) the bypass valve (SV4a) when only the No. 1 compressor is operated at its lowest frequency.

• Cooling After the compressor has been operated for 15 minutes and only the No. 1 compressor is operated in un-load (its lowest frequency), the bypass valve is turned ON when the low pressure (63 LS) is 1.0 kg/cm MPa) or less and turned OFF when it is 2.0 kg/cm

G (0.196 MPa) or more.

G (0.098

OFF

1.0 kg/cm (0.098 MPa)

2.0 kg/cm (0.196 MPa)

• Heating After the compressor has been operated for 3 minutes and only the No. 1 compressor is operated in un-load (its lowest frequency), the bypass valve is turned ON when the high pressure (Pd) exceeds 27 kg/cm MPa) and turned OFF when it is 24 kg/cm

OFF

24 kg/cm2G

(2.35 MPa) (2.65 MPa)

(2.35 MPa) or less.

27 kg/cm2G

(4) Bypass - capacity control

The solenoid valves are bypass valves (SV1, SV4a and SV6a) that allow bypassing of the high pressure and low pressure sides and solenoid valves (SV22 and SV32) that control the capacity control valve inside the compressor. They operate as follows.

1) Bypass valve (SV6a) [SV6a is on (open)]

• As shown in the table below, control is performed by the operation and stopping of the No. 1 compressor and No. 2 compressor.

(2.65

No. 1 compressor No. 2 compressor SV6a

Stop Stop OFF Operate Stop ON Operate Operate OFF

–41–

2) Bypass solenoid valves (SV1, SV4) [Both SV1 and SV4 are on (open)]

SV22

SV32

COMP

Item

At compressor is started Compressor stopped during cool-

ing or heating mode After operation has been stopped

During defrosting ((*1) in Fig below) During oil recovery operation

When low pressure (Ps) has dropped during lower limit frequency operation(15 minutes after start)

When the high pressure (Pd) is risen up during lower limit frequency operation (3 minutes after starting)

When the discharge temperature (Td) is risen up

SV1

ON OFF

ON for 4 minutes

ON for 3 minutes

ON during oil recovery operation after continuous low-frequency compressor operation.

—

Pd 27.5 kg/cm2G

(2.70 MPa)

Pd 24 kg/cm2G (2.35 MPa) and after 30 seconds.

—

Ps < 1.0 kg/cm

(0.098 MPa)

Pd 27 kg/cm2G

(2.65 MPa)

130°C

• Td

(No. 1 compressor)

115°C (No. 2 compressor)

and

•

Pd > 20 kg/cm2G

(1.96 MPa) or Ps < 3.5 kg/cm

(0.34 MPa)

SV4a

— —

—

Normally ON

—

Ps 2.0 kg/cm2G

Pd (2.35 MPa) and after

30 seconds

OFF

(0.196 MPa)

24 kg/cm2G

115°C (No. 1 compressor) 100°C (No. 2 compressor)

* Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

Start

(4-minute)

Thermo. OFF

Thermo. ON

(2-minute) (4-minute) (3-minute)

3) Capacity control solenoid valve (SV22, SV32). :P500 only

• Operation of solenoid valve

Solenoid valve

Status Full-load

(Operating at 100 % capacity)

Un-load (Capacity control operation)

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

Defrost

Stop

–42–

(5) Oil return control (Electronic expansion valve (SLEV))

• The amount of opening of the oil-return LEV (SLEV) is determined as follows: in cooling, by the operating capacity of the No. 1 compressor and the ambient temperature; in heating, by the operating capacity of the No. 1 compressor.

• It is opened (64pulses) when both compressors are stopped and started for 10 minutes. (Upper limit of LEV opening is So = 388 pulse.)

• SLEV = 0 when the No. 1 compressor is stopped.

(6) Defrosting control

1) Start of defrosting

• After there has been heating operation for 50 minutes or after 90 minutes has passed and a piping temperature (TH5) of – 8°C or less is detected for a preset time, defrosting begins.

• When 10 minutes has passed since the compressor began operation or for forced defrosting (Setting of Dip SW27 on) when 10 minutes has passed since recovery from defrosting forced defrost mode recomes active.

2) End of defrosting

• Defrosting ends when 12 minutes have passed since the start of defrosting, or when a piping temperature (TH5 and TH7) of 7°C or more is detected for 4 minutes or longer. (Note that if the defrost-prohibited time is set on 90 minutes, the defrost-prohibit time will be 50 minutes following a 12-minute timed recovery .

• Ending the defrosting is prohibited for 4 minutes after the start of defrosting.

3) Defrost-prohibit

• Defrosting is not performed for 10 minutes after the start of compressor operation and during oil recovery mode.

4) Abnormalities during defrosting

• If an error is detected during defrosting, the defrosting is stopped and the defrost-prohibit time is set to 20 minutes by the compressor cumulative operating time.

–43–

5) Change in number of operating indoor units while defrosting

• If the number of indoor units changes while the outdoor unit is defrosting, the defrosting operation continues. Once defrosting has ended, control for changing the number of units is performed.

• If the indoor unit is stopped while the outdoor unit is defrosting or if the thermostat is set to off, the defrosting operation continues. Once defrosting has ended, the unit is stopped.

6) Number of compressors operating during defrosting

• The number of compressors operating during defrosting is always two.

(7) Control of liquid level detecting heater

Detect refrigerant liquid level in accumulator, and heat refrigerant with liquid level heater for judging refrigerant amount. 7 steps of duty control is applied to liquid level heater depending on frequency and outdoor air temperature, 1 minute after starting compressor.

(8) Judgement and control of refrigerant amount

• Judge refrigerant amount by detecting refrigerant liquid surface in the accumulator.

1) Judgement of accumulator liquid level

• Return refrigerant from accumulator liquid level detecting circuit to compressor inlet pipe, detect piping temperature, and judge liquid level. When heated with heater, liquid refrigerant temperature is almost equal to low pressure saturation temperature, and gas refrigerant temperature is a little higher than low pressure saturation temperature. By comparing these temperatures A in accumulator inlet portion, refrigerant liquid level can be judged. Accumulator liquid level is judged in 3 steps as shown in the figure, from temperature A and liquid level detecting temperatures (TH3, TH4). After deciding refrigerant status (Liquid: TH3 and TH4 are TH2 + 9 °C or less, Gas: TH3 and TH4 are TH2 + 9°C or more), judge liquid level by comparing TH3 and TH4.

Balance pressure pipe

Dividing plate

*Temperature A: low pressure saturation temperature

AL=2

(TH2).

AL=1

Inlet pipe

TH2

AL=0

Outlet pipe

TH4

TH3

• Judgement by the AL is at best only a rough guideline. Please do not add refrigerant based on the AL reading alone.

2) Control of liquid level detection 1 Prohibition of liquid level detection

Liquid level is detected in normal conditions except for the following; (Cooling)

• For 6 minutes after starting unit, and during unit stopping. (Heating)

• During defrosting.

• For 10 minutes after refrigerant recovery.

(Note that liquid level determination is being performed even when liquid level detection is being disregarded.)

2 In case AL = 2 is detected for 3 consecutive minutes during liquid level detection (control at excessive refrigerant

replenishment and trouble mode)

• Changed to intermittent fault check mode preceded by 3 minutes restart prevention. But it is not abnormal when the discharge SH is high. Error stop is observed when trouble is detected again in the same intermittent fault check mode (for 30 minutes after unit stops for intermittent fault check).

• When turning on liquid level trouble disreguard switch (SW2-4), error stop is not observed, and 3 minutes restart prevention by intermittent fault check mode is repeated. However, LED displays overflow. (Turning SW2-4 on makes the error of TH6 < outdoor air sensor > inef fective.)

3 When operation mode shows “Stop,” excessive or insufficient refrigerant display and excessive or insufficient

refrigerant ignore display are extinguished.

–44–

(9) Outdoor unit heat exchanger capacity control

1) Control method

• In order to stabilize the evaporation temperature during cooling and the high-pressure pressure during heating that are required in response to performance needs, the capacity of the outdoor heat exchanger is controlled by regulating the fan volume of the outdoor unit by phase control and controlling the number of fans and by using the solenoid valves to vary the number of out door heat exchangers being used.

2) Control

• When both of the compressors are stopped, the fans for the outdoor units are also stopped.

• The fans operate at full speed for 5 seconds after starting.

• The fans for the outdoor unit are stopped during defrosting.

3) Capacity control pattern

Operation mode

Full cooling

Cooling mainly

Full heating

Heating mainly

Defrosting

* In stop, all are OFF.

Operation pattern

SV3 SV4 SV5 SV6 SV7 SV8

ON OFF OFF OFF OFF

ON OFF OFF OFF OFF OFF

ON OFF

ON ON ON

ON OFF OFF

ON OFF OFF OFF

ON OFF

Solenoid valve

ON ON ON

OFF

ON ON ON

OFF

ON OFF OFF

ON OFF

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON OFF OFF OFF

ON OFF

ON OFF OFF OFF OFF OFF

ON OFF OFF OFF OFF OFF OFF

ON OFF OFF OFF

(10) Circulating composition sensor (CS circuit)

• As shown in the drawing below; the CS circuit has the structure to bypass part of the gas discharged from the compressor through the capillary tube to the suction side of the compressor, exchange heat before and after the capillary tube, and produce two phase (gaseous and liquid) refrigerant at the capillary tube outlet. The dryness fraction of refrigerant at the capillary tube outlet is estimated from the temperature of high pressure liquid refrigerant at the capillary tube inlet (TH9) and the temperature of low pressure two phase (gaseous and liquid) refrigerant at the capillary outlet (TH2) and the pressure (LPS) to calculate the composition of refrigerant circulating the refrigeration cycle (αOC). It is found by utilizing the characteristic that the temperature of two phase (gaseous and liquid) R407C under a specified pressure changes according to the composition and dryness fraction (gas-liquid ratio in weight).

• The condensing temperature (Tc) and the evaporating temperature (Te) are calculated from αOC, high pressure (HPS), and low pressure (LPS).

• The compressor frequency, the outdoor fan, and others are controlled according to the codensing temperature (T c) and the evaporating temperature (Te).

• CS circuit configuration (Outline drawing)

ON OFF OFF OFF OFF OFF

ON OFF OFF OFF OFF OFF OFF

ON OFF OFF OFF

Outdoor heat exchanger

Four-way valve

Heat exchanger

Compressor

Accumulator

TH9

TH2

LPS

CS circuit

–45–

Separate compressor

Indoor heat

exchanger

Flow control

valve

(11) Control at initial starting

• When the ambient temperature is low (5°C or less in cooling and – 5°C or less in heating), initial starting will be performed if the unit is started within 4 hours of the power being turned on.

• The following initial start mode will be performed when the unit is started for the first time after the power has been turned on.

Start of initial operation mode

Step 1

•

Only the No.1 compressor is operated (f 75 Hz)

•

Operation of the No.2 compressor is prohibited.

•

Finished when cumulative operating time reaches 30 minutes.

At the completion of Step 2, if the frequency of No.1 compressor is below the specified value and if Step 2 has been completed less than 3 times, the process does not proceed to Step 3 but rather enters the Pause Step and then repeats Step 2.

Pause Step

• Both compressors are stopped, regardless of the demand from the indoor units. (3 minutes)

Step 2

•

Only the No.1 compressor is operated.

•

Operation of the No.2 compressor is prohibited.

•

Operates continuously for 10 minutes and finishes.

Step 3

••Both compressors, No.1 and No.2, are operated

(Forced) Finished when cumulative operating time reaches 30 minutes.

Initial operation mode is finished.

–46–

(Example 1)

(Example 2)

ON/OFF of

No.1 compressor

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

30 minutes

Step 1

minutes

10 minutes

minutes

10 minutes

Step 2

10 minutes

End of initial operation mode

5 minutes

Note 1

Step 3

End of initial operation mode

5 minutes

Note 1

Note 2

ON/OFF of

No.2 compressor

(Example 3)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Step 1

30 minutes

Step 1

minutes

Step 2

10 minutes

Step 2

minutes

Step 2Step 2

10 minutes

Step 2

3 times

minutes

Step 3

10 minutes

Step 2

End of initial operation mode

5 minutes

Note 3

Note 2

Step 3

Note 1:If the frequency of No. 1 compressor is above the specified level at the end of Step 2, the mode proceeds to

Step 3.

Note 2: At the completion of Step 2, if the frequency of No. 1 compressor is below the specified value and if Step 2 has

been completed less than 3 times, the process does not proceed to Step 3 but rather enters the Pause Step and then repeats Step 2.

Note 3: At the completion of Step 2, if it has been completed more than 3 times, the mode will proceed to Step 3 even

if the frequency of No. 1 compressor is below the specified value.

–47–

(12) Emergency response operating mode

The emergency operation mode is a mode in which the unit is run in an emergency to respond to the trouble when the compressors (No. 1, No. 2) break down, making it possible to carry out a abnormality reset using the remote control.

1) Starting the Emergency Operation Mode

1 Trouble occurs (Display the abnormality code root and abnormality code on the remote control). 2 Carry out trouble reset with the remote control. 3 If the abnormality indicted in 1 above is of the kind that permits emergency operation (see the table below),

initiate a retry operation. If the trouble indicated in 1 above is of the kind where emergency operation is impossible (see the table below), restart operation after carrying out the previous abnormality reset (without entering the emergency operation mode).

4 If the same abnormality is detected again during the retry operation in 3 above, carry out trouble reset once

more with the remote control, then try emergency operation starting corresponding to the contents of the abnormality

T able Emergency Operation Mode Patterns and

Emergency Mode Pattern

When a No. 1 Compressor Failure Occurs

When No. 2 Compressor Failure Occurs

Codes for which emergency operation is possible.

Serial transmission abnormality 0403 VDC sensor/circuit abnormality 4200 Bus voltage abnormality 4220 Radiator panel overheat protection 4230 Overcurrent protection 4240 IPM alarm output 4250 /Bus voltage abnormality Thermal sensor abnormality (Radiator panel) 5110 IAC sensor/circuit abnormality 5301

Overcurrent protection

Abnormality

Codes for which Emergency Operation is Possible or Impossible

Abnormality Codes for which Emergency Operation is Impossible

Trouble codes other than those at left.

Emergency Operation only with the No. 2 Compressor

* After the retry operation, even if

there is a different abnormality code detected within <Inverter Abnormality> at left, press the button and after resetting, start the unit by emergency operation.

[Example]

4250 → Reset → Retry → 4240 → Reset → Emergency operation

Emergency Operation only with the No. 1 Compressor

Action

Caution

During emergency operation, only X marked percentage of indoor units can be operated during emergency operation

. In case, more than X marked percentage of indoor units are operated, over than the percentage of indoor units would be on the stand-by mode.

400 500 No. 1 Compressor Failure × 48 % × 65 % No. 2 Compressor Failure × 65 % × 65 %

–48–

[2] Control of BC Controller

(1) Control of SV A, SVB and SVC

SVA, SVB and SVC are turned on and off depending on connection mode.

Mode

Connection

SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF

(2) Control of SVM1 (only FA type)

SVM1 is turned on and off corresponding to operation mode.

Operation mode Cooling-only Cooling-main Heating-only Heating-main Stop

SVM1 ON OFF OFF OFF OFF

(3) Control of LEV

LEV opening (sj) is controlled corresponding to operation mode as follows: (Number of pulse)

Operation mode

LEV1

LEV3

Cooling Heating Stop Defrost

Cooling-only Heating-only Cooling-main Heating-main Stop

2000

Superheat

control *1

Differential

Pressure control

• Liquid level control *3

• Differential pressure control

Differential

Pressure control

2000

* Please confirm that the above parts of BC controllers are being color-corded and shown with the name plate inside

the BC controller unit.

LEV3a

Superheat control

Differential pressure control

–

Superheat

control *1

Control every minute so that superheat amount detected by bypass inlet and oulet temperatures TH12, TH15 stay in the specified range. (FA: TH12, TH15, FB: TH22, TH25)

Control every minute so that detected differential pressure (PS1, PS3) stay in the specified range.

60 or more pulses are sometimes detected because of rise in liquid side pressure (PS1).

Superheat

control *1

Superheat

control *1

–49–

[3] Operation Flow Chart

(1) Outdoor unit

Start

“HO” blinks on the remote

controller

Oil return LEV, fully closed

1. 52C OFF

2. Inverter output 0Hz

3. Outdoor fan Stop

4. All solenoid valve OFF

Fan

dress No. to remote

Breaker

turned on

YES

Set indoor ad-

controller

YES

Operation command

YES

Operation

mode

Error mode

Normal operations Trouble observed Stop

Note : 1

Cooling-only, Heating-only, Cooling/heating mixed

Note : 2

YES

Error stop

52C ON

Note : 3

Operation

mode

Cooling (Cooling-

only) operations

Note : 1 For about 3 minutes after turning on power source, address and group information of outdoor unit, BC, controller indoor unit,

Note : 2 Two trouble modes included indoor unit side trouble, (BC controller trouble) and outdoor unit side trouble. In the case of indoor

Note : 3 Operation mode conforms to mode command by BC controller. Note : 4 In case BC controller issues cooling/heating mixed operation mode, outdoor unit decides operation mode of cooling-main

and remote controller are retrieved by remote controller, during which “HO” blinks on and off on remote controller. In case indoor unit is not grouped to remote controller, “HO” display on remote controller continues blinking even after 3 minutes after turning on power source.

unit side trouble, error stop is observed in outdoor unit only when all the indoor units are in trouble. However, if one or more indoor units are operating normally, outdoor unit shows only LED display without undergoing stop.

operation or heating-main operation.

Heating (Heating-

only) operations

Operation mode command to (BC controller) outdoor unit

Cooling/heating mixed

Note : 4

Operation

mode

Cooling-main

operations

Heating-main

operations

Error code blinks on the outdoor controller board

Error command to

BC controller

Error code blinks on the

remote controller

–50–

(2) BC controller

Start

Breaker

turned on

YES

Operation

1.Operation mode judgement (cooling-only, heating-only, cooling/heating mixed)

2.Transmission to outdoor unit

Receiving operation mode

command from outdoor unit

command

YES

Error mode

Note : 1

YES

Normal operations Trouble observed Stop

Fan

Solenoid valve OFF,

LEV fully closed.

Cooling-only

operations

Note : 1 Two error modes include indoor unit side trouble, BC controller trouble, and outdoor unit side trouble. In the case of indoor

unit side trouble, error stop is observed in the concerned indoor unit only, and in the cases of BC controller and outdoor unit side troubles, error stop is observed in all the indoor units, BC controller, and outdoor unit.

Operation mode

Heating-only

operations

Cooling/heating mixed

Operation mode

Cooling-main

operations

Heating-main

operations

Error stop

Error code blinks on the outdoor controller board

Error command to

BC controller

Error code blinks on the

remote controller

–51–

(3) Indoor unit

Start

Breaker

turned on

YES

Normal operations Trouble observed Stop

YES

3-minute drain

pupm ON

Operation SW

turned on

1. Protection function self-holding cancelled.

2. Indoor unit LEV fully closed.

Remove controller display extinguished

FAN stop

Drain pump

YES

Note :1

Note :2

Error mode

YES

Error stop

Error code blinks on the remote controller

Error command to outdoor unit

Indoor unit LEV fully closed

Note :1

Error code blinks on the outdoor controller board

Cooling mode

Cooling

display

Prohibition Prohibition

Heating

mode

Heating

display

YES

Cooling operations

Heating operations

Operation mode

YES

Dry operation

Prohibition “Remote controller blinking”

only for PURY

Dry mode

Dry display

Cooling/heating automatic mode

Cooling/heating automatic display

Note :3Note :3 Note :3

YES

Cooling/heating automatic operations

Prohibition Prohibition

Fan mode

Fan display

YES

Fan operations

Note : 1 Indoor unit LEV fully closed : Opening 60 Note : 2 Two error modes include indoor unit trouble, (BC controller trouble) and outdoor unit side trouble. In the case of indoor unit

trouble, error stop is observed in the concerned indoor unit only, and in the cases of (BC controller and) outdoor unit side troubles, error stop is observed in all the indoor units connected.

Note : 3 “Prohibition” status is observed (when several indoor units are connected to one connection, of BC controller and) when

connection mode is different from indoor unit operation mode. (Operation mode display on the remote controller blinks on and off, fan stops, and indoor unit LEV is fully closed.)

–52–

(4) Cooling operation

Cooling operation

YES

4-way valve OFF

Indoor unit fan

operations

Test run start

Thermostat ON

YES

3-minute

restart

prevention

Normal operations Test run Stop

YES

1.Inverter output 0Hz

2.Indoor unit LEV, oil return LEV

3.Solenoid valve OFF

4.Outdoor unit fan stop

5.BC controller solenoid valve OFF

6.BC controller LEV fully closed

1.Inverter frequency control

2.Indoor unit LEV, oil return LEV control

3.Solenoid valve control

4.Outdoor unit fan control

5.BC controller solenoid valve control

6.BC controller LEV control

–53–

(5) Heating operation

Heating operation

4-way valve ON

Thermostat ON

YES

Note : 1 Note : 2

Defrosting

operation

Test run start

YES

3-minute

restart

prevention

Normal operations Defrosting operations Stop Test run

YES

4-way valve OFF

YES

1.Indoor unit fan stop

2.Inverter defrost frequency control

3.Indoor unit LEV fully opened, oil return LEV fully closed

4.Solenoid valve control

5.Outdoor unit fan stop

6.BC controller solenoid valve control

7.BC controller LEV control

1.Indoor unit fan very low speed operations

2.Inverter output 0Hz

3.Indoor unit LEV, oil return LEV fully closed

4.Solenoid valve OFF

5.Outdoor unit fan stop

6.BC controller solenoid valve OFF

7.BC controller LEV fully closed

Note : 1 When outdoor unit starts defrosting, it transmits defrost operations command to (BC controller and) indoor unit, and the

Note : 2 Defrosting start condition : After integrated 50 minutes of compressor operations, and –8˚C: or less outdoor unit coil

indoor unit starts defrosting operations. Similarly when defrosting operation stops, indoor unit returns to heating operation after receiving defrost end command of outdoor unit.

Defrosting end condition : After 12 minutes of defrosting operation or the outdoor unit coil temperature (TH5 and TH7)

1.Indoor and outdoor unit fan control

2.Inverter frequency control

3.Indoor unit LEV, oil return LEV control

4.Solenoid valve control

5.BC controller solenoid valve control

6.BC controller LEV control

temperature. (TH7) having risen to 7˚C or more.

–54–

(6) Dry operation

Dry operations

4-way valve OFF

Normal operations Thermostat ON Stop

1.Indoor unit fan stop

2.Inverter output 0Hz

3.Indoor unit LEV, oil return LEV closed

4.Solenoid valve OFF

5.Outdoor unit fan stop

6.BC controller solenoid valve OFF

7.BC controller LEV fully closed

Test run start

Inlet temp. 18˚C

YES

1.Outdoor unit (Compressor) intermittent operations

2.Indoor unit fan intermittent operations

YES

(Synchronized with compressor : low speed, OFF operations)

YES

Note : 1

Note : 2

Thermostat ON

Note : 1 When indoor unit inlet temperature exceeds 18˚C, outdoor unit (compressor) and indoor unit fan start intermittent operations

Note : 2 Thermostat is always kept on in test run, and indoor and outdoor unit intermittent operation (ON) time is a little longer than

synchronously. Operations of outdoor unit, BC controller, indoor unit LEV and solenoid valve accompanying compressor are the same as those in cooling operations.

normal operations.

–55–

[4] List of Major Component Functions

Name

Electronic expansion valve

Thermistor

Indoor unit

Compressor

High pressure sensor

Low pressure sensor

Pressure switch

Thermistor

Outdoor unit

Code

(Function)

LEV

TH21 (Inlet air temperature)

TH22 (Piping temperature)

TH23 (Gas piping temperature)

MC1

MC2

63HS

63LS

63H1 62H2

TH11,12 (Outlet)

TH2 (Low pressure saturation temperature)

ApplicationProduct code Specification

1 Adjustment of super heat of heat

exchanger outlet port of indoor unit during cooling.

2 Adjustment of sub-cool of heat ex-

changer outlet port of indoor unit during heating.

Indoor unit control (Thermostat).

1 Indoor unit control (Freeze preven-

tion, hot adjust, etc.).

2 LEV control during heating (sub-cool

detection).

LEV control during cooling (super-heat detection).

Uses the operating pressure to adjust the operating frequency and adjust the amount of circulating refrigerant.

When there is a load that cannot be adjusted by MC1, this function ensures the stable flow of refrigerant.

1 Detects high-pressure pressure. 2 Performs frequency control and high-

pressure protection.

1) Detects low-pressure.

2) Calculates the refrigerant circulation configuration.

3) Protects the low pressure

1 Detects high-pressure. 2 Performs high-pressure protection.

1 Detects high-pressure pressure. 2 Performs high-pressure protection.

0°C: 698 kΩ 60°C: 48 kΩ

10°C: 413 kΩ 70°C: 34 kΩ 20°C: 250 kΩ 80°C: 24 kΩ 30°C: 160 kΩ 90°C: 17.5 kΩ 40°C: 104 kΩ 100°C: 13.0 kΩ 50°C: 70 kΩ 110°C: 9.8 kΩ

1 Detects low pressure saturation tem-

perature.

2 Performs frequency control and liq-

uid level of accumulator.

DC 12 V Amount of opening of the stepping motor drive valve 60 to 2000 pulse. (Gear Type)

R0 = 15 kΩ B0/80 = 3460 Rt = 15exp{3460( - )}

273+t1273

Perform a continuity check using a tester. Conductivity among white, red and orange. Conductivity among yellow, brown and blue.

Orange

Resistance value check

0°C: 15 kΩ 10°C: 9.7 kΩ 20°C: 6.4 kΩ 25°C: 5.3 kΩ 30°C: 4.3 kΩ 40°C: 3.1 kΩ

Low-pressure shell scroll type. Winding resitance

0.481 (20°C). Low-pressure shell scroll type.

Winding resistance: each phase.

1.996 (20°C): P400 YMF-C

1.197 (20°C): P500 YMF-C

Pressure 0 to 30 kg/cm2G

63HS

(0 to 2.94 MPa)

63LS

Vout 0.5 to 3.5 V Connector GND (Black) Vout (White) Vc (DC 5 V) (Red)

Pressure 0 to 10 kg/cm2G (0 to 0.98 MPa) Vout 0.5 to 3.5 V (0.3 V/kg/cm2, V/MPa)

Gnd (black) Vout (white) Vc (DC 5 V) (Red)

Conductivity check

Connector

Set to 30 kg/cm2G (2.94 MPa) OFF.

Resistance check

R120 = 7.465 kΩ B25/120 = 4057 Rt =

7.465exp{4057( - )}

R0 = 33 kΩ B0/100 = 3965 Rt = 33exp{3965( - )}

273+t1393

Resistance check

273+t1273

– 20°C: 92 kΩ – 10°C: 55 kΩ

0°C: 33 kΩ 10°C: 55 kΩ 20°C: 13 kΩ 30°C: 8.2 kΩ

Inspection method

White

Red

Yellow Brown Blue

–56–

Name

Thermistor

Outdoor unit

Solenoid valve

Code

(Function)

TH4 (Liquid level detection)

TH5 (Pipe temperature)

(Outdoor temperature)

TH7 (Pipe inlet heat exchanger temperature)

TH9

TH10

THHS inverter heat sink temperature

SV1 dischargesuction bypass

SV22 capacity control (full load)

SV32 capacity control (unload)

SV4a dischargesuction bypas

Detects liquid level of refrigerant inside accumulator using the differences among TH2, TH3, TH4.

1 Frequency control. 2 Controls defrosting during heating.

1 Detects the outdoor air temperature. 2 Performs fan control, liquid level

heater control, opening settings of LEV for oil return and other functions.

Controls defrosfing during heating

1) Detects the CS circuit fluid temperature.

2) Calculates the refrigerant circulation configuration.

1) Detects the compressor shell temperature.

2) Provides compressor shell overheating protection.

Inverter cooling fan control using THHS temperature.

1 Capacity control of high/low

pressure bypass when starting and stopping.

Discharge pressure rise suppression.

Switching of capacity control valve inside No. 2 compressor (Switching between full load operation and unload operation) (only P500 YMF-C).

Capacity control and controlling the rise of high-pressure (Back-up of frequency control).

R0 = 15 kΩ B1/80 = 3460 Rt = 15exp{3460( - )}

273+t1273

0°C: 15 kΩ 10°C: 9.7 kΩ 20°C: 6.4 kΩ 25°C: 5.3 kΩ 30°C: 4.3 kΩ 40°C: 3.1 kΩ

R0 = 15 kΩ B1/80 = 3460 Rt = 15exp{3460( - )}

273+t1273

0°C: 15 kΩ 10°C: 9.7 kΩ 20°C: 6.4 kΩ 25°C: 5.3 kΩ 30°C: 4.3 kΩ 40°C: 3.1 kΩ

R120 = 7.465 kΩ B25/120 = 4057 Rt =

7.465exp {4057( - )}

273+t1273+120

20°C: 250 kΩ 70°C: 34 kΩ 30°C: 160 kΩ 80°C: 24 kΩ 40°C: 104 kΩ 90°C: 17.5kΩ 50°C: 70 kΩ 100°C: 13.0kΩ 60°C: 48 kΩ 110°C: 9.8kΩ

R50 = 17 kΩ B25/120 = 4170 Rt = 17exp {4170 ( - )}

273+t1323

0°C:181 kΩ 10°C:105 kΩ 20°C: 64 kΩ 25°C: 50 kΩ 30°C: 40 kΩ 40°C: 26 kΩ

AC 220 to 240 V Open: conducting Close: not conducting

AC 220 to 240 V Close: conducting Open: not conducting

AC 220 to 240 V Open: conducting Close: not conducting

Inspection methodApplicationProduct code Specification

Resistance checkTH3

Resistance checkTH6

Resistance check

Conductivity test using tester

–57–

Name

Solenoid vallve

Linear expansion valve

Heater

Outdoor unit

4-way valve

Code

(Function)

SV3~8 heat exchanger capacity control

SV6a dischargesuction bypass

SLEV (Oil return)

CH11 CH12 crankcase heater

CH2 CH3 Accumulator liquid level detection

21S4a 21S4b

Controls heat exchanger capacity of outdoor unit.

Evaporation of liquid refrigerant inside MC2.

Adjusts the rate of refrigerant (oil) returning from the accumulator.

Refrigerant heating inside compressor.

Refrigerant heating of accumulator liquid level detection circuit.

Switching of cooling/heating cycle.

AC 220 to 240 V Close: conducting Open: not conducting

AC 220 to 240 V Open: conducting Close: not conducting

DC 12 V stepping motor drive valve opening amount 0 to 480 pulse (Direct drive type).

Belt heater AC 200 to 240 V MC1 1280 Ω 45 W MC2 400:1280 Ω 45 W

500:1029 Ω 56 W

Code heater 2880 Ω (1440 Ω + 1440 Ω) AC 220 to 240 V 20 W (10 W + 10 W)

AC 220 to 240 V Not conducting: cooling cycle Conducting : heating cycle

Inspection methodApplicationProduct code Specification

Conductivity test using tester.

Same as indoor unit LEV. However, the resistance value is different than the indoor unit.

Resistance check

Conductivity check using tester.

–58–

[5] Resistance of Temperature Sensor

Thermistor for low temperature Thermistor Ro= 15kΩ ± 3% (TH3 ~ 9) Thermistor R120 = 7.465kΩ ± 2% (TH1, 10)

t = 15exp {3460 ( - )} Rt = 7.465exp {4057 ( - )}

273+t

273+0

273+t

273+120

Resistance (kΩ)

–20 –10 10 20 30 40 500

Resistance (kΩ)

90 100 110 120

Temperature (˚C) Temperature (˚C)

Thermistor R Rt = 33exp {3965 ( - )} Rt = 17exp {4170 ( - )}

o = 33kΩ ± 1% (TH2) Thermistor R50 = 17kΩ ± 2% (THHS)

273+t

273+0

273+t

273+50

Resistance (kΩ)

Temperature (˚C) Temperature (˚C)

–59–

6 REFRIGERANT AMOUNT ADJUSTMENT

By clarifying the relationship between the refrigerant amount and operating characteristics for BgR2 Series, conduct service activities such as decision on the amount and adjustment of refrigerant on the market.

[1] Operating Characteristics and Refrigerant Amount

The followings are operating characteristics and refrigerant amount which draw special attention.

During cooling operations, required refrigerant amount tends to increase (refrigerant in accumulator decreases) in proportion to increase in the number of operating indoor units. However, the change of increase rate is small.

During heating operations, liquid level of accumulator is the highest when all the indoor units are operating.

Discharge temperature hardly changes when increasing or decreasing refrigerant amount with accumulator filled with refrigerant.

Tendency of discharge temperature

Compressor shell temperature is 20 ~ 70 degrees higher than low pressure saturation temperature (TH2) when refrigerant amount is appropriate. → Judged as over replenishment when temperature difference from low pressure saturation temperature (TH2) is 10 degrees or less.

During cooling operations, discharge temperature tends to rise at overload than low temperature.

During heating operations, discharge temperature tends to rise at low temperature than overload.

The lower the operating frequency is, the higher the discharge temperature tends to become because of deteriorated compressor efficiency.

Comparison including control system

[2] Adjustment and Judgement of Refrigerant Amount

(1) Symptom

The symptoms shown in the table below are the signs of excess or lack of refrigerant amount. Be sure to adjust the amount of refrigerant in refrigerant amount adjustment mode, by checking operation status, judging refrigerant amount, and performing LED monitor display with LED Dip S/W1, 1-10, for overall judgement of excess or lack of refrigerant amount.

Error stop at 1500 remote controller display (excessive refrigerant replenishment)

Operating frequency does not fully increase, thus resulting in insufficient capacity

Error stop at 1102 remote controller display (discharge temperature trouble)

Error stop at 1501 remote controller display (low refrigerant trouble)

Excessive refrigerant replenishment

Insufficient refrigerant replenishment

–60–

(2) Refrigerant Volume

1) Checking the Operating Condition Operate all the indoor units in cooling or in heating, checking the discharge temperature, sub-cooling, low pressure saturation temperature, inlet temperature, shell bottom temperature, fluid level, fluid step, etc. and rendering an overall judgment.

Note:

Depending on the operating state, AL = 0 does not mean that there is insufficient refrigerant.

1 Discharge temperature is high. (125°C or higher)

Condition

2 Low pressure saturation temperature is extremely low. 3 Inlet superheating is high (if normal, SH = 20 deg. or lower). 4 Shell bottom temperature is high (the difference with the low pressure saturation

temperature is 70 deg. or greater)

5 Shell temperature is low (the difference with the low pressure saturation temperature is

10 deg. or lower).

6 Liquid level AL = 2

Refrigerant volume tends toward insufficient.

Refrigerant volume tends toward overcharge.

Judgment

2) Cautions When Judging the Liquid Level If you are judging the liquid level, be sure the liquid level sensor function (sensor and heater) are operating normally.

1 Liquid Heater Disconnection Check 2 Liquid Heater Output Check

Turn 1 ON on the LED monitor display switch (SW1) the signal for the heater relay to LED 5, then check the voltage of the heater terminal (AC 198 ~ 264 V) (leave the heater connections as they are).

3 Use the LED monitor display to check if there is misalignment between the actual

temperature and the detected temperature of TH2 ~ TH4.

Check Items Judgment

12345678910

, and output

Normal if the resistance is 2.8 kΩ ± 7 %. Normal if AC 198 ~ 264 V is output

together with the LED lighting.

3) Check the refrigerant volume by LED monitor display using the LED. Set the LED monitor display switch (SW1) as shown below and check the past information (history) concerning the refrigerant volume.

12345678910

Set SW1 as shown in he figure at right.

If LD3 lights up, it indicates the refrigerant charge abnormal delay state just before emergency stop due to refrigerant overcharge (1500).

(3) Additional Refrigerant Charge Volume

At the time of shipping from the factory, the outdoor unit is charged with the amount of refrigerant shown in the following table, but since no extension piping is included, please carry out additional charging on-site.

Outdoor Unit Model PURY-P400YMF-C PURY-P500YMF-C

Refrigerant Charge Volume 20 kg 22 kg

Calculation Formula Calculate the additional refrigerant volume by calculating the size of the extension liquid piping and its length (units: m).

Additional Refrigerant Volume (kg) = (0.31 × L1) + (0.12 × L2) + (0.06 × L3) + (0.024 × L4) + α1 + α2

(Note 1)

In the calculation results, round up fractions smaller than 0.01 kg. (Example: 18.54 kg → 18.6 kg)

(α Calculation Table)

Total Capacity of Connected Indoor Units α1

161 ~ 330 2.0 kg 331 ~ 480 2.5 kg 481 ~ 630 3.0 kg

631 ~ 4.0 kg

1: Length of ø25.4 high press pipe (m)

L2: Length of ø12.7 liquid pipe (m) L3: Length of ø9.52 liquid pipe (m) L

4: Length of ø6.35 liquid pipe (m)

α1:refer to the calculation table.

α2

BC controller (master) only 0 kg

BC controller (slave) connected 3.0 kg

(Note 1) : In case high press pipe size (L1) is

ø22.22, 0.25 × L1.

–61–

[3] Refrigerant Volume Adjustment Mode Operation

(1) Procedure

Depending on the operating conditions, it may be necessary either to charge with supplementary refrigerant, or to drain out some, but if such a case arises, please follow the procedure given below.

Switching the function select switch (SW2-4), located on the outdoor unit’s control board, ON starts refrigerant volume adjustment mode operation and the following operation occurs. (Refrigerant recovery mode and oil recovery mode will be invalid.)

Additionally, if the LED monitor display switch (SW1) on the outdoor unit’s control board is set to

12345678910

the accumulator’s liquid level is indicated by the LED lighting position.

AL = 0 (No fluid in accumulator) AL = 1 (Liquid in accumulator) AL = 2 (Overcharge)

Notes 1 Even if AL = 1 for a short time after operation in the refrigerant volume adjustment mode starts, as

time passes (as the refrigeration system stabilizes), it may change to AL = 0.

Notes 2 As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacu-

ate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season.

Notes 3 A refrigerant volume adjustment performed in the cooling mode must be done with a gauge reading of 13 kg/cm2G or

higher. If the pressure does not reach this guage reading the refrigerant cannot be collected. Therefore, collect used refrigerant and evacuate the unit completely, and then fill new refrigerant up to a specified quantity.

Notes 4 Judgment by the AL is at best only a rough guideline. Please do not add refrigerant based on the

AL reading alone. (Be sure to obtain calculations of the correct amount before adding refrigerant.)

Notes 5 When supplementing the refrigerant volume, please be careful to charge with liquid refrigerant.

TH1 SC11

12345678910

SC16 Pd (High pressure)

12345678910

–62–

(2) Refrigerant adjustment in Cooling season (Flow chart) In case of PURY-P400, 500YMF-C

Adjustment starts.

Start cooling operation of all indoor units in a test run mode. Note 1

Has the

compressor been

operated for more than

30min?

Was the operation condition stabilized?

The high pressure > 13kg/cm2G?

*Operate for 5 minutes after adjusting the refrigerant and make a judgement.

TH1 ≤ 115˚C?

Fill refrigerant little by little from the low-pressure side service port.

YES NO

Note 1)As the refrigerant volume can not be adjusted in the heating mode,

retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season.

Is the

thermostat turned

on/off in order for the indoor

unit to prevent from

frosting?

Stop the refrigerant volume adjustment and retrieve the refrigerant. After evacuating air, fill the specified volume of refrigerant.

Are all indoor units SHs more than 6deg?

*Operate for 5 minutes after adjusting the refrigerant and make a judgement.

5deg ≤ SC11?

Note 2

10 ≤ SC16 ≤ 30deg?

Note 3

Is the LEV opening

degree stable when SH

< 6deg?

Fill refrigerant little by little from the low-pressure side service port.

*Operate for 5 minutes after adjusting the refrigerant and make a judgement.

Retrieve the refrigerant little by little

30deg < SC16?

from the low-pressure side service port.

Fill refrigerant little by little from the low-pressure side service port.

*Operate for 5 minutes after adjusting the refrigerant and make a judgement.

TH1 ≤ 110˚C?

Adjustment completed.

Fill refrigerant little by little from the low-pressure side service port.

–63–

Note 2)SC11 : Liquid refrigerant sub-cool for BC controller inlet Note 3)SC16 : Liquid refrigerant sub-cool for BC controller outlet

(3) Refrigerant adjustment in heating season (Flow chart) In case of PURY-P400, 500YMF-C

Start

Adjustment

YES

Run all the indoor units in the heating condition in the test run mode.

Note: 1

Note: 2

Has the operating

condition stabilized?

Is the

Note: 3

accumulator's liquid level

AL = 0?

Charge with small amounts of refrigerant at a time through the low pressure service port.

After adjusting the refrigerant volume, run for 5 minutes and judge the AL.

Did the liquid level

change from AL = 0 to

AL = 1?

AL = 1 or 2

Is the

Note: 3

accumulator's liquid level

AL = 1?

Note: 4

Is the accumulator's

liquid level AL=0 when just one indoor

unit is running.

Drain out small amounts of refrigerant at a time from the low pressure service port.

Did the liquid level

change from AL = 1 to

AL = 0?

AL = 2

Adjustment is

not necessary.

Drain out small amounts of refrigerant at a time from the low pressure service port.

After adjusting the refrigerant volume, run for 5 minutes and judge the AL.

Did the liquid level

change from AL = 2 to

AL = 1?

Finish charging with refrigerant. Finish draining out refrigerant. Finish draining out refrigerant.

Determine the difference between the volume of refrigerant needed for heating and the volume needed for cooling and charge with that amount.

Draining out approximately 5 kg of refrigerant.

Note: 5

Note: 6

Turn on switches No. 1, 2, 4, 5 and 6 of the self-diagnosis switch (SW1), switching to the mode in which the

Adjustment

complated.

liquid level is displayed by the LED.

After adjusting the refrigerant volume, run for 5 minutes and judge the AL.

Is the

accumulator's liquid level

AL = 1?

Turn all of switches of SW1 OFF.

Note: 7

Readjust.

If adjustment of the refrigerant volume was done by heating operation, it is possible that accumulation of refrigerant due to the lengthened piping could have a great influence, so it is recommended that operation be checked during the cooling season.

Note: Do not let the drained out refrigerant escape to the outside atmo-

sphere.

Adjustment

complated.

–64–

Note: 1 If there are any units which are not operating, it will cause refrigerant to accumulate, so by all means operate all the

indoor units. Also, in order to prevent stable operation from being disrupted by the thermostat going OFF, set the trial operation mode.

Note: 2 If the high pressure is stabilized, it is safe to judge that the operation condition is stable.

Judge that operation is stabilized or not stabilized by whether the compressor starts after 3 or more minutes have passed.

Note: 3 When turning on SW1 to

, the LED will display the liquid level.

12345678910

Note: 4 If AL = 1, it indicates that adjustment is not necessary , but when the liquid level is on the low side even if it is in the

AL = 1 region, if one unit only is run and refrigerant is accumulating in the units that are stopped, it may result in there being insufficient refrigerant, so at such a time, adjustment is necessary.

Note: 5 Determine the difference in the volume of refrigerant necessary for cooling and for heating as follows, and carry out

supplementary charging in accordance with the table below.

* The piping length is the total pipe length calculated for a high press pipe with a ø25.4 size.

Pipe Length

Additional Refrigerant

Volume

60 m or less 60 ~ 90 m

18 kg 27 kg 31 kg

90 m or longer

If the liquid pipe size is ø 12.7, the actual length is 0.3 If the liquid pipe size is ø 9.52, the actual length is 0.2 If the liquid pipe size is ø 6.35, the actual length is 0.1

–65–

7 TROUBLESHOOTING

[1] Principal Parts

Pressure Sensor

(1) Judging Failure

1) Check for failure by comparing the sensing pressure according to the high pressure/low pressure pressure sensor and the pressure gauge pressure. Turn on switches 1, 3, 5, 6 (High) and 2, 4, 5, 6 (Low) of the digital display select switch (SW1) as shown below, and the sensor pressure of the high pressure/low pressure sensors is displayed digitally by the light emitting diode LD1.

12345678910

High Pressure

Low Pressure

1 In the stopped condition, compare the pressure readings from the gauge and from the LD1 display.

(a) If the gauge pressure is 0~1 kg/cm (b) If the pressure according to the LD1 display is 0~1 kg/cm2G (0.098MPa), there is faulty contact at the connec-

tor, or it is disconnected. Proceed to 4. (c) If the pressure according to the LD1 display is 32 kg/cm (d) If other than (a), (b) or (c), compare the pressure readings during operation. Proceed to 2.

12345678910

G (0.098MPa), the internal pressure is dropping due to gas leakage.

G (3.14MPa) or higher, proceed to 3.

2 Compare the pressure readings from the gauge and from the LD1 display while in the running condition.

(a) If the difference between the two pressures is within 1 kg/cm

G (0.098MPa), both the affected pressure sensor

and the main MAIN board are normal. (b) If the difference between the two pressures exceeds 1 kg/cm

G (0.098MPa), the affected pressure sensor is

faulty (deteriorating performance). (c) If the pressure reading in the LD1 display does not change, the affected pressure sensor is faulty.

3 Disconnect the pressure sensor from the MAIN board and check the pressure according to the LD1 display.

(a) If the pressure is 0~1 kg/cm

G (0.098MPa) on the LD1 display, the affected pressure sensor is faulty.

(b) If the pressure is 32 kg/cm2G (3.14MPa) (in the case of the low pressure sensor, 10 kg/cm2G (0.98MPa)) or

higher, the MAIN board is faulty.

4 Disconnect the pressure sensor from the MAIN board and short out the No. 2 and No. 3 pins of the connector

(63HS, 63LS), then check the pressure by the LD1 display. (a) If the pressure according to the LD1 display is 32 kg/cm

G (3.14MPa) (in the case of the low pressure sensor,

10 kg/cm2G (0.98MPa)) or higher, the affected pressure sensor is faulty. (b) If other than (a), the MAIN board is faulty.

2) Pressure sensor configuration. The pressure sensors are configured in the circuit shown in the figure at right. If DC 5 V is applied between the red and black wires, a voltage corresponding to the voltage between the white and black wires is output and this voltage is picked up by the microcomputer. Output voltages are as shown below.

High Pressure 0.1 V per 1 kg/cm

G (0.098MPa)

Low Pressure 0.3 V per 1 kg/cm2G (0.098MPa)

–66–

Connector

63HS/

63LS

Vout 0.5~3.5 V

GND (Black) Vout (White) Vcc (DC5V) (Red)

Solenoid Valve (SV1~8)

Check if the control board’s output signals and the operation of the solenoid valves match. Setting the self-diagnosis switch (SW1) as shown in the figure below causes the ON signal of each relay to be output to the LED’s. Each LED shows whether the relays for the following parts are ON or OFF. When a LED lights up, it indicates that the relay is ON.

SW1

12345678

LED

12345678910

SV3 SV4 SV5 SV6 SV7, 8

2154a 2154b

SV6aSV4a

SV1

SV22/32

1) SV1 (Bypass valve) 1 Since SV1 will be set to ON 4 minutes after the compressor has started operation, confirm operation by monitoring the

LED display and listening for the operation of the solenoid valve.

2 It is possible to confirm the switching being performed by the operation of the solenoid valve while the unit is operating

by monitoring the temperature of the bypass circuit or the sound of the refrigerant.

2) SV22, SV32 (Full load/unload switching valve) (only P500YMF-C) 1 The No. 1 compressor is started first and operates for approximately 10 minutes and then the No. 2 compressor starts

in the unload mode. Since it will then switch to full load within 5 minutes, the operation can be confirmed by the LED display and the operating temperature of the solenoid valve. (If the indoor unit operating is small, the No. 2 compressor will not start.)

2 It is possible to determine whether or not the compressors are switching from unload to full load by check the changes

in amperage of the compressor at the moment of switching. The amperage under full load will be approximately 30 to 40 % more than operation under unload. Note: The solenoid valve for SV22 is closed when conducting electricity while the SV32 is open when conducting

electricity.

3) SV4a (Bypass valve) 1 During unload operation in the cooling mode and when there is a rise in temperature and during unload operation in the

heating mode, SV4a will be set to ON according to conditions, making is possible to check operation by the LED display and the operating sound of the solenoid valve.

2 It is possible to confirm the switching for the operating status by the temperature of the bypass circuit or the sound of

the refrigerant during the operation of the solenoid valve.

4) SV6b When No. 2 compressor is operating and No. 2 compressor is stopped, the main SV6 will be set to ON, making it possible to confirm operation by monitoring the LED display and listening to the operating sound. Note that it may be set to OFF if the outlet temperature (TH11) exceeds 120°C .

5) 21S4a, 21S4b 21S4a, 21S4b are turned on during heating mode and heating-main mode.

6) SV3 ~ 8 (Control of heat exchanger capacity) (a) Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of

SV3 ~8 are turned on depending on conditions during cooling-only operations.

(b) Operation can be confirmed by LED display and operating sound of solenoid valve, because all of SV3 ~ 8 are

turned on during heating-only operations.

SV3 ~8 are turned on depending on conditions during cooling-principal and heating-principal operations.

–67–

Solenoid Valves Block1

The refrigerant flow is as following figure. Hot gas (high pressured) flows in cooling mode and cool gas/liquid (low pressured) flows in heating mode. Please refer to the Refrigerant Circuit Diagram. And, ON/OFF of Solenoid valve is depends on the amount of running indoor units, ambient temperature and so on. So please check by LED Monitor Display. If the SV coil is taken off, then it is possible to open caps and check plungers. But the special tool which is on the Service Parts List is needed.

* Closed torque : 13kg·m (1.3N·m)

–68–

Solenoid Valves Block2

Solenoid V alves Block 2

SV7

SV8

32 4

CV4b

CV7b

CV6b

CV5b

CV2b

CV3b

–69–

ST1

BV1

BV2

Check Valves Block1

The refrigerant flow in the pipe 6, 7, 8 and 9 are depend on ON/OFF of the SV3, 4, 5 and 6. Please confirm by LED monitor display. You can open the cap of valve A, B and C, but 3 types of hexagon socket screw keys. The size is as follows.

* Closed torque : A : 1.7kg·m (0.17N·m)

B : 20kg·m (2.0N·m) C : 13kg·m (1.3N·m)

–70–

Check Valves Block2

CV5b

CV4b

CV6b

CV2b

Check V alves Block2

13576

CV3b

4 2

–71–

ST1

BV1

BV2

Outdoor LEV

The valve percentage opening changes in proportion to the number of pulses. (Connections between the outdoor unit’s MAIN board and SLEV, (PURY -P400·500YMF-C))

Pulse Signal Output and Valve Operation

Output (phase)

Output states

1234567 8

ø1 ON OFF OFF OFF OFF OFF ON ON ø2 ON ON ON OFF OFF OFF OFF OFF ø3 OFF OFF ON ON ON OFF OFF OFF ø4 OFF OFF OFF OFF ON ON ON OFF

LEV Valve Closing and Valve Opening Operations

Valve Closing

Valve Opening

Valve Opening Angle (Flow Rate)

Fully Open 480 pulses

Output pulses change in the following orders when the

Valve is Closed 1→2→3→4→5→6→7→8→1 Valve is Open 8→7→6→5→4→3→2→1→8

*1. When the LEV percentage opening does not change,

all the output phases are off.

2. When the output is out of phase or remains ON continuously, the motor cannot run smoothly, but move jerkily and vibrates.

* When the power is switched ON, a 520 pulse valve

opening signal is output to make sure the valve’s position, so that it is definitely at point A. (The pulse signal is output for approximately 17 seconds.)

* When the valve operates smoothly, there is no sound

from the LEV and no vibration occurs, but when the valve is locked, it emits a noise.

* Whether a sound is being emitted or not can be

determined by holding a screwdriver, etc. against it, then placing your ear against the handle.

* If there is liquid refrigerant inside the LEV, the sound

may become lower.

Pulse Count

–72–

Judgment methods and likely failure mode

Caution:

The specifications of the outdoor unit (outdoor LEV) and indoor unit (indoor LEV) differ. For this reason, there are cases where the treatment contents differ, so follow the treatment specified for the appropriate LEV as indicated in the right column.

Failure Mode Judgment Method Treatment Affected LEV

Microcomputer driver circuit failure

1 Disconnect the control board connector and connect

the check LED as shown in the figure below.

Indoor, BC controller

Outdoor

When the base power supply is turned on, the indoor LEV outputs pulse signals for 10 seconds, the outdoor LEV outputs pulse signals for 17 seconds, and BC controller outputs pulse signals for 10-20 seconds. If the LED does not light up, or lights up and remains on, the driver circuit is abnormal.

In the case of driver circuit failure, replace the control board.

Indoor

BC controller

Outdoor

LEV mechanism is locked.

The LEV motor coils have a disconnected wire or is shorted.

Fully closed failure (valve leaks)

1 If the LEV is locked up, the drive motor turns with no

load and a small clicking sound is generated. Generation of this sound when the LEV is fully closed or fully open is abnormal.

Measure the resistance between the coils (red - white, red

- orange, brown - yellow, brown - blue) using a tester. They are normal if the resistance is within 150Ω ± 10%.

Measure the resistance between the coils (gray - orange, gray - red, gray - yellow, gray - black) using a tester. They are normal if the resistance is within 46Ω ± 3%.

1 If you are checking the indoor unit’s LEV, operate the

indoor unit’s blower and the other indoor units in the cooling mode, then check the piping temperatures (liquid pipe temperatures) of the indoor units by the operation monitor through the heat source unit’s control board. When the fan is running, the linear expansion valve is fully closed, so if there is leakage,

Thermistor liquid pipe (temperature sensor)

Linear Expansion Valve

the temperature sensed by the thermistor (liquid pipe temperature sensor) will become low. If the temperature is considerably low compared to the remote control’s intake temperature display, it can be judged that there is a fully

closed failure. In the case of minimal leakage, it is not necessary to replace the LEV if there are no other effects.

Replace the LEV.

Replace the LEV coils.

If there is a large amount of leakage, replace the LEV.

Indoor

BC controller

Outdoor

Indoor

BC controller

Outdoor

Indoor

BC controller

Faulty wire connections in the connector or faulty contact.

1 Check for pins not fully inserted on the connector and

check the colors of the lead wires visually.

2 Disconnect the control board’s connector and conduct

a continuity check using a tester.

–73–

Check the continuity at the places where trouble is found.

Indoor

BC controller

Outdoor

Outdoor LEV (SLEV) Coil Removal Procedure (configuration) As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated.

Coils

Stopper

Lead Wires

<Removing the Coils> Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then pull out the coils toward the top. If they catch on the stopper and are difficult to take out, turn the coils left and right until the stoppers are free from the stopper indentations, then pull the coils out. If you take out the coils only without gripping the body, undue force will be applied to the piping and the pipe may be bent over, so be sure to fasten the body in such a way that it will not move.

Body

Indentation for Stopper (12 places around the circumference)

Part A

<Installing the Coils> Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then insert the coils from the top, inserting the coils’ stopper securely in one of the indentations on the body. (There are four indentations for the stopper on the body around its circumference, and it doesn’t matter which indentation is used. However, be careful not to apply undue force to the lead wires or twist them around inside the body .) If the coils are inserted without gripping the body, it may exert undue force on the piping, causing it to become bent, so be sure to hold the body firmly so that it won’t move when installing the coils.

Part A

–74–

Intelligent Power Module (IPM)

Measure resistances between each terminal of IPM with tester, and use the results for troubleshooting. Specified resistance value is dependent on tester type to be used for resistance measurement, because diode inside IPM has non-linearity, thus difference of impedance and voltage in tester being influential. As the internal impedance of resistance range of analog tester equals to the center value of meter indication, the affect of internal impedance can be minimized if the tester having close center value of resistance range. Because internal voltage is normally 1.5V, the tester to be used for troubleshooting of IPM should satisfy the following conditions.

Internal voltage 1.5V (Power source : one dry cell battery) Central value of resistance range 10 ~ 40Ω

The measured values for troubleshooting are shown in the table below. (Use the minimum range for tester resistance range.)

• External view • Internal circuit diagram

1471016

• Judged value

Tester

Tester –

P U V

UVWN

∞∞∞∞

2~ 100Ω

2~ 100Ω2~100Ω2~100Ω2~100Ω

Pre-Driver

1 6

Pre-Driver

4 9

Pre-Driver

∞

7 11

Pre-Driver

∞ ∞

Over heating

protection circuit

B N

Diode stack Perform continuity check with tester. Judged as normal if the following characteristics are observed. (Use the minimum range for tester resistance range.)

Tester ⊕

Tester -

1 10~50Ω∞ 2 10~50Ω∞ 3 10~50Ω∞

Tester -

Tester

123

⊕

1 ∞ 10~50Ω

2 ∞ 10~50Ω 3 ∞ 10~50Ω

1 2 3

–

+–

–75–

(2) Trouble and remedy of remote controller (In the case of MA remote controller)

Phenomena Factors Check method and handling

If pushing the remote control operation SW does not make a sound such as feep with the crystal display lamp out, and no operate is possible.

(An appropriate display on the remote control is not on.)

1) Power supply from transformers is not turned on in Indoor Unit. 1 The original power supply of Indoor Unit is not

turned on.

2 The connector (CND. CNT, CN3T) on the

controller board in the room has come off.

Fuse on the control board in Indoor Unit has melting down.

Transformer defects or damage to unit.

2) MA remote controller has been wired incorrectly. 1 Break of the MA remote controller line and the

connection to the terminals has come off.

2 Short circuit of the MA remote control wiring 3 Reversed connections of the wiring on remote

controller.

4 Incorrect connection of the MA remote control wiring

to the transmission line terminal block (TB 5).

5 Reversed connections between the MA remote

control wiring in the indoor unit and AC 200V power supply wiring.

6 Reversed connection between the MA remote

control wiring in the indoor unit and M-NET transmission wiring.

3) The maximum number of MA remote controllers connected to one is unit exceeded (two units).

4) The wiring length of the MA remote line and the used electric wire diameter is out of specifications.

5) The wiring of the remote display output to the outdoor unit is short circuited, or the relay is connected with reversed polarity.

6) Defective of the controller board in the room

7) Defects of MA remote control

a) Check the MA remote control terminal

voltage (between A and B). i) In the case of voltage DC8.5- 12V,

the remote controller is defective.

ii) In the case of voltage not available:

●

Check the left described 1) and 3), after checking , if these are factors, then modifications should be performed.

●

If there are no factors of the left described 1) and 3), move to b).

b) Remove the remote control wiring from

the terminal block TB13 for the MA remote control in the indoor unit, and check voltage between A and B. i) In the case of voltage DC9-12V

Check the left described 2) and 4), if these are factors, then modifications should be performed.

ii) In the case of voltage not available:

●

Recheck the left described 1) once again, if this is a factor, them modifications should be performed.

●

If there are no factors in the left described 1), check the wiring for the remote display (the relay polarity, etc.)

●

If there are no factors, replace the controller board in the indoor unit.

In the case of item 1), the LED 1 on the controller board in the unit is off.

When turning on the remote control operation SW, a temporary operation display is indicated, and the display lights out immediately, the unit stops.

Check method and handling

The same

phenomena occurs in all units of

the same refrigerant system?

Self-diagnosis LED check

7120 error display?

1) M-NET transmission power supply from the outdoor unit is not supplied.

1 The original power supply of the outdoor unit is not turned on. 2 Disconnection of connectors on the board of the outdoor unit.

Main board --- CNS1, CNVCC3 INV board --- CNAC2, CNVCC1, CNL2 3 Power supply circuit defects of the outdoor unit. (For detail, refer to Pages 127)

●

INV board defects

●

Blown fuse (F1 on INV Board)

●

Diode stack destruction

●

Prevention resistance of rush current (R1) damage

2) Transmission line short

3) Wiring mistakes of the M-NET transmission line on the side of the outdoor unit

1 Break of transmission line, and removal of terminal block 2 The room transmission line is wired to the transmission line

terminal block (TB7) for the central control by mistakes.

4) M-NET transmission line break on the side of the room unit

Disconnection off wiring between the M-NET transmission terminal block (TB 5) and the room controller board CN2M and pulls off of connectors

YES

Check for 4) item

YES

Check for 2) and 3) of factors

In the case of factors 2) and

3) Indicated by 7102 error code on the self-diagnosis LED of the outdoor unit.

Terminal block (TB15) voltage check for the transmission line of the indoor unit

19 ~ 12V?

YES

Check for 5) item

Check for 1) item

Modify the defect

–76–

Modify the defect

YES

Factors available?

Defects in the indoor unit controller board or MA remote control

Phenomena Factors

3 When the remote

control SW is turned on, the indication goes off after approximately 20- 30 seconds, and indoor unit stops.

Check method and handling

Check the BC controller power terminal block voltage

1) Power supply from the transformer is not available to the control board of BC controller.

1 The original power supply of the BC controller is not turned on. 2 Removal of connectors (CN12, CN38, CNTR) on the control board of the BC controller. 3 Fuse on the control board of the BC controller is blown. 4 Transformer defects of the BC controller and a malfunction. 5 Defects on the control board of the BC controller

220 ~ 240V?

YES

Fuse check on the board

Fuse blown off

Connector removal checks (CN03, CN12, CNTR)

Removed?

Check for resistance value of transformer

Within spec.?

YES

BC controller Defects for the control board

YES

Verify the power supply wiring original power supply.

220 ~ 240V circuit short and ground checks

Connector connection defects

Check for factors of transformer cut Earth route on the board Earth route of sensor and LEV

Modify the defective places

Power supply reapplying

*1 As for transformer checks, It is subject to the failure judgment method of main parts in 4.5.

–77–

Phenomena Factors

4 “HO” indication on

the remote controller is not lit, and the ON/OFF switch does not work.

1) The M-NET transmission power supply form the outdoor unit is not supplied. 1 The original power supply of Indoor Unit is not

turned on.

2 The connector on the controller board in Indoor

Unit is removed. Main board ----CNS1, CNVCC3 INV board----CNAC2, CNVCC1, CNL2

Power supply circuit defects of the outdoor unit. (For detail, refer to Pages 127)

●

INV board defects

●

Diode stack defects

●

Prevention resistance of rush current (R1)

damage.

2) Short circuit of the M-NET transmission line

3) Error wiring of the M-NET transmission line on the side of the outdoor unit 1 A break of the transmission line or terminal block

removal

2 Indoor Unit transmission line is wired to the

transmission line terminal block (TB7) for the central control by mistake.

4) M-NET transmission line break on the side of Indoor Unit (Short/ Open)

Loose or disconnection of wiring between the M-NET transmission terminal block (TB 5) of Indoor Unit and Indoor Unit controller board CN2M and disconnection of connectors

6) Error wiring of the MA remote control

1 Short circuit of the MA remote wiring 2 A break of the MA remote control line (No.2) and

disconnection

Reversed wiring, cross-over in the group control

of the terminal block connection

4 Wire by mistakes the MA remote control to the

terminal block (TB5) for the transmission line

Connect by mistakes the M-NET transmission line to the MA remote control terminal block (TB13)

7) The unit address is not “00” as it should be with automatic address setting.

8) The address of

Indoor Unit

becomes 51 or more.

9) The master and slave setting of the MA remote control becomes the slave setting.

10)Use the M-NET remote control in spite of the automatic address.

11)Defects for the room controller board (MA remote communication circuits)

12)Defects for the remote controller

In the case of 2), 3) and 7) factors, indicate 7102 errors by the self-diagnosis LED of the outdoor unit.

Check method and handling

phenomena in all unit of the same

The same

refrigerant system happen?

YES

Self-diagnosis LED checks

7120 error display?

Check for 11) item

Factors

available?

Check for 1) item

YES

Check for 2) and 3) of factors

Change the M-NET remote control to the MA remote control.

Modify the defective places

Check for 4) item

Modify the defective places

Check for the terminal block (TB15) voltage for the transmission line of the indoor unit

YES

19 ~ 12V?

Check the items of

5), 6), 8), 9), and 10)

Factors available?

Defects of the indoor unit controller board or MA remote control

YES

–78–

(In the case of M-NET remote controller)

Symptom Cause Checking method & countermeasure

Despite pressing of remote controller ON/OFF switch, operation does not start and there is no electronic sound.

(No powering signal

appears.)

At about 10 seconds after turning remote controller operation switch ON, the display distinguishes and the operation stops.

1) M-NET transmission power source is not supplied from outdoor unit. 1 Main power source of outdoor unit is not

connected.

2 Disconnection of connector on outdoor unit circuit

board. Main board : CNS1, CNVCC3 INV board : CNAC2, CNVCC1, CNL2

3 Faulty power source circuit of outdoor unit.

• Faulty INV board,

• Blown fuse (F1 on INV board)

• Broken diode stack

• Broken resistor (R1) for rush current protection

2) Short circuit of transmission line.

3) Erroneous wiring of M-NET transmission line at outdoor unit. 1 Transmission line disconnection or slipping off from terminal

block.

2 Erroneous connection of indoor/outdoor transmission line to

TB7.

4) Disconnection of transmission wiring at remote controller.

5) Faulty remote controller.

1) Power source is not fed to indoor unit from transformer.

1 Main power source of indoor unit is not turned on. 2 Disconnection of connector (CND, CNT, CN3T) on indoor controller board. 3 Blown fuse on indoor controller board. 4 Faulty or disconnected transformer of indoor unit. 5 Faulty indoor controller board.

2) Faulty outdoor control circuit board uncontrolled.

As normal transmission is fails between indoor and outdoor units, outdoor unit model can not be recognized.

a) Check transmission terminal block of

remote controller for voltage. i) In case of 17 ~ 30V

→ Faulty network remote controller

ii) In case of less than 17V

→ See “Transmission Power Circuit

(30V) Check Procedure”.

The cause of 2) and 3) is displayed with self-diagnosis LED for 7102 error.

Checking method & countermeasure

Check indoor LED3

Lighting?

Lighting

Check for the change of LED display by operating dip switch SW1 for self-diagnosis.

Extinguishing or unable to confirm

Check indoor unit power source terminal block voltage

AC 220~240V?

YES

Check fuse on circuit board

Blown?

Check connection of connector (CND, CNT , CN3T)

Disconnected

Check transformer resistance value

Within rated?

YES

Check self-diagnosis function of outdoor unit

Changed?

YES

Check main power source of power source wiring.

Check 220V~240V circuit for short circuit and ground fault.

Improper connector connection

Check cause of transformer disconnection.

•Ground fault on circuit board

•Ground fault on sensor, LEV

Apply power source again.

Check self-diagnosis function after powering outdoor unit again.

Faulty outdoor unit control circuit board

Repair faulty point.

YES

Faulty indoor controller board

Changed?

YES

Accidental trouble

*1 Check the transformer in accordance with the “TROUBLE SHOOTING” in the indoor unit’s service handbook.

–79–

Symptom Cause

3 “HO” display on re-

mote controller does not disappear and ON/OFF switch is

(Without using MELANS)

1) Outdoor unit address is set to “00”

2) Erroneous address. 1 Address setting of indoor unit to be coupled with remote controller incorrect.

ineffective.

2 Address setting of remote controller incorrect.

3) Faulty wiring of transmission terminal block TB5 of indoor unit in the same group with remote controller.

4) Centralized control SW2-1 of outdoor unit is turned ON.

5) Setting to interlocking system from indoor unit (Switch 3-1 = OFF), while Fresh Master is intended to be use by remote controller operation (indoor unit attribute).

6) Disconnection or faulty wiring of indoor unit transmission line.

7) Disconnection between indoor unit M-NET transmission line terminal block (TB5) and connector CN2M.

8) More than 2 sets of power supply connector (CN40) are inserted into centralized control transmission line of outdoor unit.

9) Faulty outdoor unit control circuit board.

10)Faulty indoor controller board.

11)Faulty remote controller.

(Interlocking control with MELANS)

12)No grouping registration from MELANS (Neglecting to set the relation between indoor unit and network remote controller).

13)Disconnection of centralized control transmission line (TB7) at outdoor unit.

14)At system connected with MELANS, power supply connector (CN40) is inserted to centralized control transmission line of outdoor unit.

Checking method & countermeasure

(Indoor unit = remote controller - 100.)

(Remote controller = indoor unit + 100.)

In case MELANS is not used

Same symptom for all units in a single refrigerant system?

YES

Check outdoor unit address

51 ~ 100?

YES

Check centralized control switch SW2-1 at outdoor unit

ON?

Faulty outdoor unit control circuit board

YES

Outdoor unit address setting miss

Switch setting miss Change from ON to OFF

Address setting miss of remote controller

Indoor address setting miss

Transmission line wiring miss of indoor unit M-NET

Disconnection of CN2M connector

Confirm address of remote controller with “HO” displayed

Check connection between indoor unit M-NET transmission terminal block (TB5) and connector CN2M

YES

Indoor unit + 100?

YES

Check address of coupling indoor unit

Remote controller

-100? YES

Check voltage of indoor unit MNET transmission terminal block

17 ~ 30V?

YES

Disconnection

Check Fresh Master SW3-1

Faulty indoor controller board or remote controller

ON?

YES

Repair spot in trouble

Setting miss of Fresh Master SW3-1

In case with MELANS used

When MELANS is used, “HO” display on the remote controller will disappear at the group registration of the indoor unit and local remote controller. If “HO” does not disappear after the registration, check the items 12) ~ 14) in the Cause column.

–80–

Symptom Cause Checking method & countermeasure

4 “88” appears on re-

mote controller at registration and access remote controller

[Generates at registration and confirmation]

1) Erroneous address of unit to be coupled.

2) Disconnection of transmission line of unit to be coupled (No connection).

3) Faulty circuit board of unit to be coupled.

4) Installation miss of transmission line.

a) Confirm the address of unit to be

coupled.

b) Check the connection of transmission

line.

c) Check the transmission terminal block

voltage of unit to be coupled. i) Normal if voltage is DC17 ~ 30V ii) Check the item d) in case other than i).

[Confirmation of different refrigerant system controller]

5) Disconnection of power source of outdoor unit to be confirmed.

6) Disconnection of centralized control transmission line (TB7) of outdoor unit.

7) Power supply connector (CN40) is not inserted into centralized control transmission line in grouping with different refrigerant system without using MELANS.

8) More than 2 sets of power supply connector are inserted into the centralized control transmission line of outdoor unit.

9) In the system connected with MELANS, power supply connector (CN40) is inserted into the centralized control transmission line of outdoor unit.

10)Short circuit of centralized control transmission line.

d) Confirm the power source of outdoor unit

to be coupled with the unit to be confirmed.

e) Confirm that the centralized control

transmission line (TB7) of outdoor unit is not disconnection.

f) Confirm the voltage of centralized control

transmission line. i) Normal in case of 10V ~ 30V ii) Check the items 7) ~ 10) left in case

other than i).

–81–

Transmission Power Circuit (30 V) Check Procedure If “” is not displayed by the remote control, investigate the points of the trouble by the following procedure and correct it.

No. Check Item Judgment Response

Disconnect the transmission line from TB3 and check the TB3 voltage.

DC24~30 V

Check the transmission line for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact.

Check if the following connectors are disconnected in the outdoor unit’s control box. MAIN Board: CNS1, CNVCC3, CNVCC4 INV Board: CNVCC2, CNVCC4, CNL2, CNR, CNAC2

Disconnect the wires from CNVCC3 on the Main board and check the voltage between pins 1 and 3 on the wire side of the CNVCC3.

Tester + .....1 pin

Tester - .....3 pin

Disconnect the wiring from CNVCC2 on the INV board and check the voltage between pins 1 and 3 of CNVCC2.

Tester + .....1 pin

Tester - .....3 pin

Disconnect the wiring from CNL2 on the INV board, and check the resistance at both ends of choke coil L2.

Disconnect the wiring from CNR on the INV board, and check the resistance at both ends of R7.

Except the above-mentioned Connector disconnected

Except the above-mentioned

DC24~30 V

Except the above-mentioned DC24~30 V

Except the above-mentioned

0.5~2.5Ω Except the above-mentioned 19~25Ω Except the above-mentioned

Go to No. 2 Connect the connectors as shown on the electric

wiring diagram plate. Go to No. 3

Check the wiring between CNS1 and TB3 for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact. If there is no trouble, replace the Main board.

Go to No. 4 Check the wiring between CNVCC2 and

CNVCC3 for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact.

Go to No. 5 Go to No. 6 Replace choke coil L2. Go to No. 7 Replace R7.

Check the resistance at both ends of F01 on the INV board.

Check the voltage between pins 1 and 3 of CNAC2 on the INV board.

Check the voltage between L2 and N on power supply terminal block TB1.

0Ω Except the above-mentioned AC198~264 V Except the above-mentioned AC198~264 V

Except the above-mentioned

Go to No. 8 Replace F01 Replace the INV board. Go to No. 9 Check the wiring to CNAC2 for the following and

correct any defects. Broken wire, faulty contact.

Check the power supply wiring and base power supply, and correct any defects.

–82–

(3) Investigation of transmission wave shape/noise

Control is performed by exchanging signals between outdoor unit, indoor unit and remote controller by M-NET transmission. If noise should enter into the transmission line, the normal transmission will be hindered causing erroneous operation.

1) Symptom caused by the noise entered into transmission line

Cause Erroneous operation Error code

Noise entered into transmission line

Signal changes and is misjudged as the signal of other address.

Transmission wave shape changes to other signal due to

6600

6602

noise. Transmission wave shape changes due to noise, and can

6607

not be received normally thus providing no reply (ACK). Transmission can not be made continuously due to the

6603

entry of fine noise. Transmission can be made normally, but reply (ACK) or

answer can not be issued normally due to noise.

6607 6608

2) Method to confirm wave shape

No fine noise allowed *1

VHL

52 µs Logical

VBN

52 µs value “0”

Logical

52 µs value “1”

52 µs52 µs

No fine noise allowed *1

Check the wave shape of transmission line with an oscilloscope to confirm that the following conditions are being satisfied.

1 The figure should be 104µs/bit ± 1%. 2 No finer wave shape (noise) than the transmission signal (52µs ± 1%) should be allowed. *1 3 The sectional voltage level of transmission signal should be as follows.

Logic value Transmission line voltage level

0VHL = 2.0V or more 1VBN = 1.3V or less

*1 However, minute noise from the DC-DC converter or inverter operation may be picked up.

–83–

3) Checking and measures to be taken

(a) Measures against noise

Check the items below when noise can be confirmed on wave shape or the error code in the item 1) is generated.

Items to be checked Measures to be taken

1 Wiring of transmission and power lines in

crossing.

2 Wiring of transmission line with that of other

system in bundle.

3 Use of shield wire for transmission line (for

both indoor unit control and centralized control).

4 The shield is to be daisy changed exactly the

same as the transmission line.

Checking for wiring method

5 Are the units and transmission lines grounded

as instructed in the INSTALLATION MANUAL?

6 Earthing of the shield of transmission line (for

indoor unit control) to outdoor unit.

7 Arrangement for the shield of transmission line

(for centralized control).

Check for earthing

Isolate transmission line from power line (5cm or more). Never put them in the same conduit.

Wire transmission line isolating from other transmission line. Wiring in bundle may cause erroneous operation like crosstalk.

Use specified transmission wire.

Type : Shield line CVVS/CPEVS Wire diameter : 1.25mm2 or more

The transmission line is wired with 2-jumper system. Wire the shield with jumper system as same for transmission line. When the jumper wiring is not applied to the shield, the effect against noise will be reduced.

Connect to ground as shown in the INSTALLATION MANUAL.

One point earthing should be made at outdoor unit. Without earthing, transmission signal may be changed as the noise on the transmission line has no way to escape.

For the shield earth of the transmission line for centralized control, the effect of noise can be minimized if it is from one of the outdoor units in case of the group operation with different refrigerant systems, and from the upper rank controller in case the upper rank controller is used. However, the environment against noise such as the distance of transmission line, the number of connecting sets, the type of connecting controller, and the place of installation, is different for the wiring for centralized control. Therefore, the state of the work should be checked as follows. a) No earthing

• Group operation with different refrigerant systems One point earthing at outdoor unit

• Upper rank controller is used Earthing at the upper rank controller

b) Error is generated even though one point earth is being con-

nected. Earth shield at all outdoor units.

Connect to ground as shown in the user’s manual.

(b) When the wave height value of transmission wave shape is low, 6607 error is generated, or remote controller is

under the state of “HO.”

Items to be checked Measures to be taken

8 The farthest distance of transmission line is

exceeding 200m.

9 The types of transmission lines are different.

0 No transmission power (30V) is being supplied

to the idoor unit or the remote control.

A Faulty indoor unit/remote controller.

Confirm that the farthest distance from outdoor unit to indoor unit/ remote controller is less than 200m.

Use the transmission wire specified.

Type of transmission line : Shield wire CVVS/CPEVS Wire dia. of transmission line : 1.25mm2 or more

Refer to “Transmission Power Supply (30V) Circuit Check Procedure.”

Replace outdoor unit circuit board or remote controller.

–84–

4) T reatment of Inverter and Compressor T roubles If the compressor does not work when error codes 4240, 4250, 4340 or 4350 are detected, determine the point of malfunction by following the steps in the LED monitor display and countermeasures depending on the check code displayed, then perform the procedures below.

No. Check Item Symptoms T reatment

How many hours was the power kept on before

operation?

1 If it was kept on for 12 hours or

longer as specified.

2 It was kept on for less than the

specified period.

Go to [2].

Go to [2] after keeping the power on for the specified time.

When it is restarted, does

the trouble reappear?

Run the outdoor unit with the wiring to the compressor disconnected. At this time, change SW1-1 on the INV board to ON. Note) The terminals of the 3 disconnected wires should be isolated from each other.

*1 [Cautions when measuring the voltage and current of the inverter’s power circuit.]

1 The compressor stops and the

same error code is displayed.

1 The Inverter stops and the same

error code is displayed.

2 If the inverter’s output voltage is

output with good balance, *1.

3 If the balance in the inverter’s

output voltage is not good or if the inverter’s output voltages are all 0 V (a digital tester cannot be used) *1.

Perform the check of wiring shown in the explanation of each error code.

Check the IPM is faulty. (Go to “Individual Parts Failure Judgment Methods.”)

Check the coil resistance and insulation resistance of the compressor, and if it is normal, run it again, and if the trouble occurs again, replace the compressor. * Insulation resistance : 2MΩ or more

Coil resistance : 0.359 ~ 0.716Ω

Check the IPM. Judge that the IPM is faulty. (Go to “Indi- vidual Parts Failure Judgment Methods.”) If the IPM is normal, replace the G/A board, then perform this item again with SW1-1 ON. If the problem is not solved, replace the INV board. If the problem is solved and you connect the compressor again, turn SW1-1 OFF again. Check the compressor’s coil resistance and insulation resistance.

Since the voltage and current on the inverter’s power supply side and its output side do not have a sine waveform, the measurement values will differ depending on the measuring instrument and the circuit measured. In particular, as the inverter’s output voltage has a pulse waveform, the output frequency also changes, so differences in measurement values will be great depending on the measuring instrument.

1 When checking if the inverter’s output voltage is unbalanced or not (relative comparison of the voltages between

each of the lines), if you are testing with a portable tester, be sure to use an analog tester. Use a tester of a type which can be used to judge if the IPM or diode module is faulty. In particular, in cases where the inverter’s output frequency is low, there are cases where the variations in measured voltage values between the different wires will be great when a portable digital tester is used, when in actuality they are virtually equal, and there is danger of judging that the inverter is faulty.

2 It is recommended when checking the inverter’s output voltage values (when measuring absolute values), that, if a

measuring device for business frequencies is used, a rectified voltage meter (with a Correct measurement values cannot be obtained with an ordinary portable tester. (either analog or digital)

symbol) be used.

–85–

5) T reatment of Fan Motor Related T roubles

Condition Possible Cause Check Method and T reatment

1 The fan motor will not run

for 20 minutes or longer when the AK value is 10%. (When the MAIN board’s SW1 is set as shown below, the AK value is displayed by the service LED.)

SW1 = 1110001000

2 The fan motor’s vibration

is great.

1) The power supply voltage is abnormal.

2) Wiring is faulty .

If there is an open phase condition before the breaker, after the breaker or at the power supply terminal blocks TB1A or TB1B. Correct the connections.

If the power supply voltage deviates from the specified range. Connect the specified power supply.

For the following wiring, 1 check the connections, 2 check the contact at the connectors, 3 check the tightening torque at parts where screws are tightened, 4 check the wiring polarity , 5 check for a broken wire and 6 check for grounding.

TB1A~NF~TB1B~CNTR1~T01~CNTR, TB1B~CNPOW, CNF AN~CN04~CNMF, CNFAN~52F~CN05~CNMF CNFC1~CNFC2

* Check if the wiring polarity is as shown on the wiring

diagram plate.

3) The motor is faulty.

4) A fuse (F1, F2, F3) is defective.

5) The transformer (T01) is defective.

6) The circuit board is faulty.

Measure the resistance of the motor’s coils: 20~60Ω Measure the motor’s insulation resistance with a megger: 10 MΩ (DC 500 V) or more

If a fuse is defective, replace it.

Judge that T01 is faulty . Go to “Individual Parts Failure Judgment Methods.”

If none of the items in 1) to 5) is applicable, and the trouble reappears even after the power is switched on again, replace the circuit board using the following procedure. (When replacing the circuit board, be sure to connect the connectors and ground wire, etc. securely .)

1 Replace the FANCON board only. If the problem is

saved, the FANCON board was defective.

2 Replace the FANCON board and replace the MAIN

board. If the problem is saved, the MAIN board is defective.

3 If the trouble continues even after 1 and 2 above, then

both boards are defective.

–86–

6) T roubleshooting at breaker tripping

Check items Measures to be taken

1 Check the breaker capacity.

The breaker’s capacity should be correct to “System

design” in data book.

2 Check for a short circuit or grounding in the electrical

system other than the inverter.

3 Check the resistance between terminals on the terminal

block TB1A for power source.

1 0 ~ several ohms or improper megohm value

4 Checking by powering again.

1 Main power source circuit breaker tripping

2 No display of remote controller

5 Operational check by operating air conditioner

Correct any defects.

Check each part inside the inverter power circuit

(resistance, megohm or the like).

a) Diode stack

Refer to “Troubleshooting of diode stack.”

b) IPM

Refer to “Troubleshooting of IPM.” c) Rush current protection resistor d) Electromagnetic contactor e) DC reactor * For c) ~ e), refer to “Individual Parts Failure Judge-

ment Methods.”

1 Normal operation without breaker tripping.

2 Breaker tripping

a) As there is a possibility of instantaneous short

circuit generated, find the mark of the short circuit

for repair. b) When a) is not applicable, the compressor may be

faulty .

The ground fault of inverter output/compressor can

be supposed.

Disconnect the wiring to the compressor and check

the insulation resistance of the following parts with

a megger. a) Compressor terminals. b) Inverter output.

–87–

7) Individual Parts Failure Judgment Methods.

Part Name Judgment Method Diode Stack (DS) Refer to “Judging Diode Stack Failure.” Intelligent Power Module(IPM) Refer to “Judging IPM Failure.” Electromagnetic Contactor (52C) Measure the resistance value at each terminal.

A1A2

1/L1 3/L2 5/L3

Check Location Judgment Value

A1-A2 0.1k~1.3kΩ

1/L1-2/T1 3/L2-4/T2 ∞

2/T1 4/T2 6/T3

Rush Current Protection Resistor (R1, 5) Measure the resistance between terminals: 4.5k~5.5kΩ DC Reactor (DCL) Measure the resistance between terminals: 1 Ω or lower

Measure the resistance between the terminals and the chassis: ∞

Cooling Fan (MF1) Measure the resistance between terminals: 0.1k~1.5kΩ

5/L3-6/T3

Transformer (T01) Measure the resistance between terminals on the primary side (CNTR1):

1.0k~2.5kΩ Measure the resistance between terminals on the secondary side (CNTR): 20~60Ω

AC Current sensor (ACCT) Measure the resistance between terminal between 1pin and 2pin, 3pin and

4pin : 35 ~ 45 (Ω)

[Caution at replacement of inverter parts]

1 IPM and G/A board should be replaced together at the same time.

When the IPM is damaged, the G/A board may possibly be broken, and the use of the broken G/A board damages the normal IPM. Therefore, replace the IPM and G/A board together at the same time. However, if the G/A board is damaged, judge that the IPM is faulty, then judge whether replacement is necessary or not.

2 Fully check wiring for loose and incorrect connections.

The incorrect or loose connection of the power circuit part wiring like IPM and diode module causes damage to the IPM. Therefore, check the wiring fully. As the insufficient tightening of screws is difficult to find, tighten them together additionally after finishing other works. For the wiring of the base for IPM, observe the wiring diagram below carefully as it has many terminals.

3 Coat the grease provided uniformly onto the heat radiation surface of IPM /diode modules.

Coat the grease on the full surface in a thin layer, and fix the module securely with the screw for fastening. As the radiation grease attached on the wiring terminal causes poor contact, wipe it off if attached.

–88–

Motor

(Compressor)

Red

White Black

IPM

UVW

G/A board

Black

Red

Capacitor

(C2,C3)

–89–

(4) Troubleshooting the major components of the BC controller

1) Pressure sensor Pressure sensor troubleshooting flow

STAR T

Check pressure sensor, PS1, PS3, connectors for disconnection, looseness, or incorrect attachment.

OK?

Yes

Unit running?

Yes

Check on the LED monitor display.

• TH2 or LPS of outdoor unit.

• HPS of outdoor unit

• PS1, PS3 of BC controller and

confirm the following relationship HPS > PS1 (puressure calculated value)

PS3 > TH2 or LPS

OK?

Yes

Stop the unit (compressor OFF).

At least

10 minutes passed since

stopping?

Yes

Check PS1, PS3 on LED monitor display and confirm that none of the detected pressure values is below 1kg/cm2G (0.098MPa).

Note 1

Note 2

T ake corrective action.

Check that refrigerant piping and transmission line connections are in agreement between outdoor unit and BC controller.

OK?

Yes

Correct refrigerant piping and transmission line.

OK?

Yes

HPS PS1 PS3 TH2 or LPS (pressure calculated value) (The difference is less than

1kg/

cm2G (0.098MPa)

OK?

Yes No board or pressure sensor abnormality.

Check that refrigerant piping and transmission line connections are in agreement between outdoor unit and BC controller.

OK?

Yes

Confirm the

following relationship PS1

PS3?

Yes

Correct refrigerant piping and the transmission line.

Check for faulty connector on applicable pressure sensor.

OK?

Remove the pressure sensor connector from the board, and check the pressure.

Pressure

range within 0 to 1kg/cm

(0.098MPa)

Short connectors 2 and 3 on the board and check the pressure.

Pressure of at least 32kg/cm2G (3.14MPa) indicated?

Replace the wrong puressure sensor with the correct pressure sensor, and confirm It’s detected pressure is indicated correctly.

OK?

Yes

Note 3

Note 4

Repair faulty connection.

–90–

Change pres-

Yes

sure sensor.

Change board.

Note 1 :

• Symptoms of incorrect i.e, reverse connection of PS

1 and PS3 to BC controller board

Symptom

Cooling-only Cooling-principal Heating-only Heating-principal

Normal

Insufficient cooling.

SC11 large SC16 small

PHM < 0

Warm indoor SC small. When SV opens some noise produced.

Note 2 :

• Check using LED monitor display switch (outdoor MAIN board SW1)

SC11 small SC16 small

PHM < 0

Insufficient heating Warm indoor SC small

SC11 large

SC16 small When SV opens some noise produced.

PHM < 0

Measured Data

High pressure of

Signal

HPS

SW1 Setting Remarks

1ON2345678910

See converter.

outdoor Low pressure satura-

TH2

1ON2345678910

See converter.

tion temperature Low pressure of

LPS

1ON2345678910

See converter.

outdoor BC controller pressure

(liquid measurement)

(intermediate)

PS1

PS3

1ON2345678910

Convert saturation temperature to desired pressure using converter.

Note 3 :

• Check CNP1 (liquid measurement) and CMP3 (intermediate) connectors on BC controller board for disconnection or looseness.

Note 4 :

• With the sensor of the applicable connector removed from the board, use the LED monitor display switch (Note 1) to check the pressure value.

Pressure Sensor Replacement Precaution

(Pressure sensor output voltage)

–91–

2) Temperature Sensor

Thermistor troubleshooting flow

Start

Note 1

Disconnect applicable thermistor connector from the board.

Note 2

Measure temperature of applicable thermistor (actual measured value).

Note 3

Check thermistor resistance value.

Compare temperature for thermistor resistance value with actual measured valued.

difference?

Yes

Insert applicable thermistor connector into board, and check sensor input temperature on LED monitor for difference.

difference?

Yes

No abnormality

Note 4

Note 5

Change thermistor.

Check for connection problem.

Change the controller board.

–92–

Note 1 :

• Board connector CN10 corresponds to TH11 through TH14, while connector CN1 1 corresponds to TH15 through TS15. Remove the applicable connector and check the sensor for each number.

Note 2, 3 :

1. Pull the sensor connector from the I/O board. Do not pull on the lead wire.

2. Measure resistance using a tester or other instrument.

3. Compare measured values with values on the graph below. A value within a range of ±10% is normal.

Resistance measurement point (connector)

Touch the probes of the tester or other instrument to the shaded areas to measure.

Temperature sensor resistance (graph)

Resistance value (kΩ)

Temperature (˚C)

Note 4 :

• Check using LED monitor display switch (outdoor MAIN board SW1)

Measured Data Signal SW1 Setting Remarks

1ON2345678910

Liquid inlet temperature

Bypass inlet temperature

Bypass outlet temperature

Bypass inlet temperature

Bypass outlet temperature

TH11

TH12

TH15

TH16

TH22

TH25

Thermistor Ro=15 kΩ Rt=15exp 3460 ( – )

273+t1273+0

See converter.

–93–

3) LEV, Solenoid Valve Troubleshooting Flow

No cooling No heating

Note 1

Check disconnection or looseness of connectors.

Is there a problem?

Operate in cooling or heating (1 system only when there are plural systems)

Cooling or heating

operation?

Check if LEV 1 are fully open

LEV 1 fully open?

Yes

Check if LEV3 is controlled by superheat.

LEV3 is not controlled.

Yes

Check if SVM1 is ON.

Yes

Heating operation

Note 2

Correct the problem.

Check LEV1

Check LEV3

Check if LEV 1 are fully shut.

Check if LEV 3 are controlled by differential pressure.

LEV 1 fully shut?

Yes

LEV3 are not

controlled

Yes

Check if SVM1 is OFF.

Note 2

Note 3Note 3

SVM1 ON

Yes

Check if SVA, SVC are ON.

SVA, SVC ON

Yes

Check if SVB is OFF.

SVB OFF

Yes Yes

Check SVM1

Check SVA, SVC

Check SVB

Completion

Check if SVA, SVC are OFF.

SVM1 OFF

Yes

SVA, SVC OFF

Yes

Check if SVB is ON.

SVB ON

–94–

1 LEV

Note 1 :

• Symptoms of incorrect connection to BC controller LEV board

LEV No. 1 3 Cooling-only Cooling-main Heating-only Heating-main

1) 1 3 Normal ←← ←

2) 3 1 Insufficient cooling SH12 small, SC11 small SC16 small Branch piping SC small

Insufficient cooling, insufficient heating SH12 small, SC11 small SC16 large, Branch piping SC small

PHM large

Heating indoor SC small

PHM large

Insufficient cooling Heating indoor SC small

PHM large

Improper installation is the same for 1 and 2, so it is omitted here.

Note 2 : Method for checking LEV full open, full closed condition

1 Check LEV full opening (pulse) using the LED monitor display (outdoor controller board SW1).

Full opened: 2000 pulses Full closed: 60 pulses (LEV 1 may be greater than 60 during full heating operation.)

2 With LEV full opened, check for pressure differential by measuring temperature of piping on both sides. 3 With LEV full closed, check for refrigerant noise.

Note 3 :Use the following table to determine opening due to LEV differential pressure control and superheat

control.

• BC controller LEV basic operation characteristics

Region Failure mode

LEV1

pulse

Small

Large

Small

LEV3

pulse

Large

Operating mode

Heating-only Heating-main Cooling-main

Cooling-only Cooling-main Heating-only Heating-main

Cooling-only Cooling-main

Heating-only Heating-main

High pressure (PS1) - medium pressure (PS3) is large. High pressure (PS1) - medium pressure (PS3) is small.

SH12 is large.

High pressure (PS1) - mid pressure (PS3) is small.

SC16 and SH12 are small.

High pressure (PS1) - mid pressure (PS3) is large.

Description Normal range

2.0 ~ 3.5 kg/cm2G (0.20~0.34MPa)

SH12<25

2.0 ~ 3.5 kg/cm2G (0.20~0.34MPa)

SC16>6 SH12>5

2.0 ~ 3.5 kg/cm2G (0.20~0.34MPa)

Cooling-only

LEV3a

pulse

Small

Cooling-main Heating-main

Cooling-only Cooling-main

SH22 is large.

SH22 is small.

SH22<25

SH12>5

Heating-main

* LEV3a operates when indoor unit connected to FB type is cooling mode.

–95–

(Self-diagnostic monitor)

Measured Data Signal OUTDOOR MAIN board SW1 Setting

1ON2345678910

LEV1 pulse

–

LEV 3 pulse

LEV 3a pulse

BC controller bypass output superheat

BC controller intermediate subcool

BC controller liquid subcool

–

SH12

SC16

SC11

(Solenoid Valve Troubleshooting Flow)

Start

Visually check for disconnection between connectors and terminals, and confirm correct lead colors.

Intermediate connector

Brown

Red

LEV

Remove connectors from the board and use a tester to check conduction.

• Check between connectors 1-3-5 and 24-6.

Blue

Orange

Yellow

White

2 5 1 3 4 6

OK?

Yes

OK?

Brown

Red

Blue

Orange

Yellow

White

Controller board

6 5 4 3 2 1

1ON2345678910

Correction.

Check for the following: LEV full open: ticking sound LEV full closed: no sound

OK?

Yes

Confirm if LEV is closed fully.

OK?

Yes

Attach check LEDs illustrated nearby to board connectors and confirm that LEDs light for 10 seconds.

Change LEV

6 5 4 3 2 1

10kΩ LED

Yes

Use a tester to measure resistance between each coil (red-white, red-orange, brown-yellow, brown-blue). Correct value is: 150Ω±10%

OK?

Yes

Adjust, repair.

Change LEV

–96–

OK?

End

Yes

Change the board.

2 Solenoid Valve

Solenoid valve

troubleshooting

Operation OFF?

Check solenoid valve wiring for incorrect connection, and connector disconnection or looseness.

No problem.

Operate cooler and heater for the applicable solenoid valve’s refrigerant system only.

Note 1

Clicking noise

produced when working

timing?

Yes

Measure piping temperature on both sides of solenoid valve and check for following. Solenoid valve ON: no differential Solenoid valve OFF: differential

Yes

Correct the problem.

Remove the coil and check for a magnetic force.

Measure pipe temperature of inlet and outlet sides of solenoid valve. No temperature differential: OK T emperature differential: NG

Magnetic force

is OK?

Yes

OK?

Yes

Note 3

Stop the unit.

Disconnect solenoid valve connector from the board and check for a solenoid coil conductance.

Conductance present?

Yes

With the solenoid valve connector is disconnected from the board, use remote controller to turn on the unit and check the output (220-240V) from the controller board.

220-240V output?

Yes

OK?

Yes

Solenoid valve normal

Solenoid valve faulty

–97–

Change the control board.

Change the solenoid valve.

Solenoid valves (SVA, SVB, SVC, SVM1) Coordination signals output from the board and solenoid valve operations. *SVM is not built in depending on models.

Note 1 : (SVA, SVB, SVC)

SVA, SVB and SVC are turned on and off in accordance with operation mode.

Mode

Branch port

Cooling Heating Stopped Defrosting

SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF

(SVM1)

SVM is turned on and off in accordance with operation mode.

Operation Mode Cooling-only

SVM1 ON OFF OFF OFF ON OFF

Cooling-principal

Heating-only

Heating-principal

Note 2 : (SVA, SVB, SVC) (SVM1)

Measure temperature of piping on either side of SVA 1-A Measure temperature at points marked “X”. Measure temperature of piping on either side of SVB 1-B

Defrosting Stopped

4) BC controller transformer

BC Controller control board

CNTR CN03

Red Blue Brown Brown

Normal Malfunction

CNTR(1)-(3) Approximately 90Ω

CN03(1)-(3) Approximately 1.7Ω

* Disconnect the connector before measurement.

–98–

Open or shorted

Mitsubishi Electronics P500YMF-C, PURY-P400 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual