Mitsubishi MEE03K194 Service Manual

AIR CONDITIONERS CITY MULTI

Models PUHY-P400YEM-A, P500YEM-A

PUHY-P600YSEM-A, P650YSEM-A, P700YSEM-A, P750YSEM-A PUHY-400YEM-A, 500YEM-A

PUHY-400YEMK-A, 500YEMK-A PUHY-400YEMC-A, 500YEMC-A PUHY-600YSEM-A, 650YSEM-A, 700YSEM-A, 750YSEM-A PUHY-600YSEMK-A, 650YSEMK-A, 700YSEMK-A, 750YSEMK-A PUHY-600YSEMC-A, 650YSEMC-A, 700YSEMC-A, 750YSEMC-A

Service Handbook

Service Handbook PUHY-P400YEM-A, P500YEM-A

PUHY-P600YSEM-A, P650YSEM-A, P700YSEM-A, P750YSEM-A

PUHY-400YEM-A, 500YEM-A PUHY-400YEMK-A, 500YEMK-A PUHY-400YEMC-A, 500YEMC-A PUHY-600YSEM-A, 650YSEM-A, 700YSEM-A, 750YSEM-A PUHY-600YSEMK-A, 650YSEMK-A, 700YSEMK-A, 750YSEMK-A PUHY-600YSEMC-A, 650YSEMC-A, 700YSEMC-A, 750YSEMC-A

HEAD OFFICE MITSUBISHI DENKI BLDG. MARUNOUCHI TOKYO 100-0005 TELEX J24532 CABLE MELCO TOKYO

Issued in January 2004 MEE03K194 Printed in Japan

New publication effective January 2004 Specifications subject to change without notice.

Service Handbook BigY/SuperY Y(S)EM-A(R22/R407C)

Contents

1 PRECAUTIONS FOR DEVICES

THAT USE R407C REFRIGERANT......................................... 1

[1] Storage of Piping Material ............................................. 2

[2] Piping Machining ........................................................... 3

[3] Brazing........................................................................... 4

[4] Airtightness T est............................................................. 5

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

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

[7] Dryer .............................................................................. 6

2 COMPONENT OF EQUIPMENT ............................................. 7

[1] Appearance of Components .......................................... 7

[2] Refrigerant Circuit Diagram and Thermal Sensor........ 18

[3] Electrical Wiring Diagram............................................. 22

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

[5] Function of Dip SW and Rotary SW ............................ 36

3 TEST RUN ............................................................................. 42

[1] Before Test Run ........................................................... 42

[2] Test Run Method.......................................................... 48

4 GROUPING REGISTRATION OF INDOOR UNITS WITH

M-NETREMOTE CONTROLLER........................................... 49

5 CONTROL.............................................................................. 55

[1] Control of Outdoor Unit................................................ 55

[2] Operation Flow Chart................................................. 106

[3] List of Major Component Functions ........................... 111

[4] Resistance of Temperature Sensor............................ 115

6 REFRIGERANT AMOUNT ADJUSTMENT ......................... 116

[1] Operating Characteristics and Refrigerant Amount ... 116 [2] Adjustment and Judgement of Refrigerant Amount... 116

[3] Refrigerant Volume Adjustment Mode Operation....... 119

7 TROUBLESHOOTING......................................................... 125

[1] Principal Parts............................................................ 125

[2] Self-diagnosis and Countermeasures Depending

on the Check Code Displayed ................................... 150

177

[3] LED Monitor Display ..................................................

8

.............................. 199

[1]

........................................................... 199

[2] ......... 200

[3]

.......................................................... 200

[4] .......... 201

9 ...... 202

PREPARATION, REPAIRS AND REFRIGERANT REFILLING WHEN REPAIRING LEAKS

Location of leaks: Extension piping or indoor units (when cooling)

Location of leaks: Outdoor unit (Cooling mode) Location of leaks: Extension piping or indoor units

(Heating mode) Location of leaks: Outdoor unit (when heating)

CHECK THE COMPOSITION OF THE REFRIGERANT

Safety precautions

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

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 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 cab les f or 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 dedicated 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 par ts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

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

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

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

Before installation and electric work

-1-

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 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 that specified.

• If another refrigerant is used, the chlorine

in the

refrigerant may cause the refrigerator oil to

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 tools.

• If dust, dirt, or water that gets in the refrigerant cycle, may cause the refrigerant to 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 abnor-

mal stopping.

deteriorate.

¡

PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

-2-

[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.

OK

NG

-3-

[2] Piping Machining

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

-4-

[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).

-5-

[4] Airtightness Tes

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,

temperature variations into account.

taking

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

refrigerant can then not be used.

this

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 v alve is required to prevent the vacuum pump oil from flowing back into the

circuit when the vacuum pump power is turned off (power failure).refrigerant

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

vacuum pump is not properly maintained, the degree of vacuum may be too low.

the

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

vacuum of 5 Torr.

measure a

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

charge hose to drawn in air before stopping operation.

the The same operating procedure should be used when using a vacuum pump with a check valve.

NG

-6-

Cylin-

der

Cylin-

der

Valve

Liquid

[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

Cylinder color identification R407C-Gray Charged with liquid refrigerant

R410A-Pink

Reasons :

1. R407C is a mixture of 3 refrigerants, each with a different evaporation temperature. Therefore, if the equipment charged with R407C gas, then the refrigerant whose evapor ation temperature is closest to the outside temper ature

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. Chec k 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

be the last operation performed.

should

is

-7-

[1] Appearance of Components

Heat Exchanger

Sub-cool Coil

Heat Exchanger of CS circuit (PUHY-P-YEM-A only)

Solenoid Valv e (SV5b)

Solenoid Valv e (SV7) (PUHY-P-YEM-A only)

Solenoid Valv e (SV8) (PUHY-P-YEM-A only)

Four-way Valve (21S4b)

Four-way Valve (21S4a)

Heat ExchangerAmbient temperature Sensor

Accumlator

Constant Capacity Compressor (No. 2 Compressor)

Crank Case HeaterOil Equalization Pipe

Variable Capacity Compressor (No. 1 Compressor)

Oil Separator

1 Variable capacity unit

Rear

™

COMPONENT OF EQUIPMENT

-8-

Heat Exchanger

Sub-cool CoilAccumlator

Solenoid valve (SV3, PUHN-P-YEM-A only)

Ambient temperature Sensor

Accumlator

Controller box

Oil balance pipe

Crank Case Heater

Constant capacity compressor (No. 3 compressor)

Liquid ball valve

Four-way valve

Gas ball valve

Service check-point (right; high pressure, left; low pressure)

2 Constant capacity unit

Rear

Solenoid valve (SV2, PUHN-P-YEM-A only)

Heat exchanger

-9-

Controller Box

RELAY board

FANCON board

(for MF3)

INV boardMAIN board

Choke coil (L2)

Inteligent Power Module (IPM)

G/A board

Y-C board

SNB board

Diode stack (DS)

Magnetic contactor (52C2)

Magnetic contactor (52C1)Magnetic contactor

(52F)

Overload relay

(51C2)

FANCON board

(for MF2)

Capacitor (C2, C3) (Smoothing capacitor)

Noise filter

(NF)

-10-

CNTR CNFC1 CNS1 CNS2 CN40 CN41 CNVCC3

Power Source for control

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

CNVCC4 Power source for control(5V)

CN51 Indication distance

3-4 Compressor

ON/OFF

3-5 T roub le

CNRS3 Serial transmission to INV board

CN3D

CN3S

CN3N

LD1 Service LED

SW1SWU1SWU2SW2SW3SW4

CN20 Power supply

3 L1 1 N

MAIN board

-11-

CNAC2 Power Source

1 L2 3 N 5 G

CNFAN Control for MF1

CN52C Control for 52C

CNR

CNVDC

1 - 4

DC-560V

CN15V2 Power supply for IPM control

CNVCC4 Power supply (5V)

CNL2 Choke coil

CNDR2 Out put to G/A board

CNVCC2 Power supply

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

CNTH

CNACCTCNRS2 Serial transmission to MAIN board

SW1

INV board

-12-

FANCON board

G/A board

CNFAN

CNFC2

CNPOW

CNE CNDC1

CN15V1

CNDR1

CNIPM1

-13-

Y-C board

SNB board

-14-

RELAY board

CNRT2

CNCH

CN52C2

CN52F

CN51C2

CNOUT2

-15-

• Constant capacity unit

Transformer

Magnetic contactor (52C)

Thermal overload relay (51C)

Fuses (F1, F2)

Thyristor module (SCRM)

FANCON board

Noise Filter (NF)

Terminal block TB3 transmission

Terminal block TB1 powersource

Controller Box

Control board

-16-

CONT board

CNTR

SWU2 SWU1 SW3 SW2

CNS1 M-NET transmission

CNFC1

CN20 Power supply

1 N 3 L1

-17-

FANCON board

CNWCNV

CNU CNFC2

-18-

BV3

TH7

TH8

TH5

TH6

CJ1

O/S

63HS

TH11

HEXF1

HEXF2

HEXB2

HEXB1

CJ2

CV1

SV4

SV1

CP1

TH4

TH3

CP4

CP7

BV2

BV1

TH12

Comp2

Comp1

CV2

SA

MA

CP3a

SV6

LEV1

63H1

63H2

21S4a

21S4b

SV5b

SV22 SV32

ST5

ST6

CP3b

ST3

ST4

ST9

ST8

TH9a

ST2

ST1

CJ3

ST7

TH9b

TH2

Drier

CP2

TH10c

63LS

CV3

CP5

TH10b

TH10a

SLEV

✻

SV8

SV7

❇ There are SV22,SV32 only for PUHY-P500.

[2]

Refrigerant Circit Diagram and Thermal Sensor PUHY-P400, 500YEM-A

-19-

CP1

CP5

ST6

SV1

SLEV

CP4

No.1

Comp.

TH8

HEX2a

TH5

SV5b

HEX1a

TH6

HEX2b

HEX1b

21S4b

21S4a

CJ1

63HS

ST5

SV4

SV6

TH11

63H1

CV1

CV3

O/S

CJ2

BV1

ST1

MASA

TH2

CP2

ST2

BV2

BV3

ST8

ST9

TH3

ST3

TH7

ST7

TH9

TH10a

TH10b

LEV1

SCC

TH4

ST4

CJ3

63H2

CV2

CP3a

SV22

SV32

TH12

CP3b

No.2

Comp.

❇ There are SV22,SV32 only for PUHY-500.

❇

PUHY-400, 500YEM(K,C)-A

-20-

Distributor

BV3

TH6

TH7

TH8

TH5

CJ1

O/S

63HS

TH11

HEXF1HEXB1

CJ2

CV1

SV4

SV1

SV7

SV8

CP1

TH4

TH3

CP4

BV2

BV1

TH12

Comp2

Comp1

HEXF2

HEXB2

CV2

SA

MA

CP3a

SV6

LEV1

63H1

63H2

21S4a

21S4b

SV5b

SV22SV32

ST5

ST6

CP3b

ST3

ST4

ST9

ST8

TH9a

ST2

ST1

CJ3

ST7

TH9b

TH2

Drier

CP2

TH10c

63LS

CV3

CP5

TH10b

TH10a

Distributor

TH7

TH5

O/S

TH11

CJ2

SV4

SV1

CP1

TH4

TH3

BV2

BV1

Comp1

HEX2

HEX1

SV5b

SA

MA

CP3

LEV1

63H

21S4

CJ1

CV1

BV3

ST1

ST2

ST5

ST6

ST9

ST3

ST4

ST8

TH10a

CV2

CP5

LEV2

TH6

63LS

ST10

ST7TH9

TH8

TH10b

SV3

SV2

SLEV

✻

PUHY-P600, 650, 700, 750YSEM-A

❇ There are SV22,SV32 only for PUHY-P700, 750.

PUHN-P200,250

PUHY-P400,500

Indoor unit

-21-

21S4b

HEX1b

TH6

TH10a

HEX2b

21S4a

CJ1

63HS

ST5

SV4

SV6

TH10b

O/S

ST6

CP1

SV1

HEX1a

HEX2a

SV5b

TH5

CV1

63H1

TH11

Comp1

Comp2

TH8

ST10

CP4

SLEV

TH4

ST4

ST8

CJ3

63H2

CV2

CP3a

TH12

SV22 SV32

CP3b

ST9

SA

MA

TH3

ST3

TH9

LEV1

ST7

TH7

TH2

CP2

CJ2

SCC

ST1

BV1

Distributer (Gas)

Indoor unit

BV2

ST2

BV3

BV1

ST1

CJ2

63LS

MA

SA

CP3

ST8

ST4

TH4

ST3

TH3

CP1

SV1

ST6

CV1

O/S

CJ1

ST5

SV4

21S4

TH11

63H

Comp1

TH10a

TH6

HEX1

HEX2

TH5

TH8

ST10

TH9

LEV1

ST7

TH7

CV2

BV2

SV5b

CP5

LEV2

ST2

TH10b

BV3

Oil balance

pipe

Distributer (Liquid)

ST9

PUHY-400,500

PUHN-200,250

❇

❇ There are SV22,SV32 only for PUHY-700, 750.

CV3

CP5

PUHY-600, 650, 700, 750YSEM(K,C)-A

-22-

[3]

Electrical Wiring Diagram PUHY-(P)400, 500YEM(K,C)-A

Fan motor

(Heat exchanger)

Fan motor

(Heat exchanger)

TH12

MC2

PUHY-(P)500

63H2

SV22

SV32

SLEV

TH12

63H2

MC2

63HS

MC1

PUHY-(P)400

TH4

SV1

63H1

Box

Controller

Inverter

Oil separater

TB1A

TB3 TB7

MAIN board

INV board

RELAY

R7

L2

board

FANCON

board

FANCON

board

F3

52C2

51C2

52F

F5

F6

52C1

TB1B

DCL

SNB

board

R2

+

C2-C3

+

-

R3

R1

R5

THHS

C1

ACCT

-U

MF1

NF

G/A board

IPM

ACCT

-W

DS

ZNR4

CN05CN04

(for MF3)

(for MF2)

TH2

R6

TH10a

TH8

ACCUMULATOR

TH3

21S4b

SV5b

SV4

SV6

LEV1

TH5

TH6

21S4a

❇

3

SV8

SV7 TH10b

TH9a

DEMAND

❇

2

❇

3

❇

3

❇

2

MODE

CN3D

HEATAuto

Changeover

Normal

COLL

OFF

OFFONOFF

ON

1-2 1-3

ON

MODE

CN3N

CN3S

1-3

1-2

1-2 DEMAND

NIGHT

SNOW

Refer to the service handbook

about the switch operations.

as connection with

PUHN-(P)200/250

SW4-6

ON

OFF

132

CN3N

(3P)

132

CN3S

(3P)

1234

CN13

(4P)

TH10bTH10a

CN1212(2P)

TH9b

LEV1

TH8

SV6

❇

1

50/60Hz

3N~380/400/415V

Power source

63H1

T10

T9

SV32

SV22

FB4

X08

X04

CH11

CH3

CH2

SSR

43

21

123

CN35

(3P)

M2

M1

S

M2

M1

CN34

(6P)

65432

1

2

CN38

(3P)

X05

X07

X06

12345

6

(6P)

CN36

X09

12345

6

(6P)

CN37

(3P)

CN32

TB7

TB3

X01

X02

(3P)

CNS2

2

(2P)

CNS1

13 1

12232

1

(3P)

CN33

3

L1

L2L3N

PE

L1

TB1A

L2L3N

L1NFL2L3N

123

4

B

A

(4P)

CNAC3

BOX BODY

Terminal

Block

Noise

Filter

High pressure

switch

detection

Crank case heater

(Compressor)

Indoor and

Connect to

remote

controller

8A F

600VACF6600VAC

8A F

F5

SV5b

21S4a

SV4

SV1

21S4b

X10

L3L2L1

EARTH

SNB board

X12

X11

Relay board

TH2TH7TH5TH6TH3TH4

63LS

63HS

TH11

TH9aTH10c TH12

SLEV

52C1

CH12

52F

52C2

51C2

CN51C2

(3P)

CN52C2

(5P)

CN52F

(3P)

CNCH

(3P)

CNRT2

(5P)

CNOUT2

(4P)

CNRT1

(5P)

CNOUT1

(6P)

MF1

6

5

FB3

1

2

3

CNX10

(3P)

Motor

(Compressor)

52F

1

2

3

4

5

6

L1 L2 L3

(6P)

CNFC1

F01 250VAC 6.3A F

F03 250VAC 6.3A F

F02 250VAC 6.3A F

N

CNPOW

(5P)

CNFC2

(6P)

12345

6

12345

6

V

W

N

U

MF2

12345

123

4

5123 4

Fan control board

(Fancon board)

(5P)

CNFAN

CN04

F01 250VAC 6.3A F

F03 250VAC 6.3A F

F02 250VAC 6.3A F

N

CNPOW

(5P)

CNFC2

(6P)

12345

6

V

W

N

U

MF3

12345

123

4

5123 4

Fan control board

(Fancon board)

L1 L2 L3

(5P)

CNFAN

FB5

Black

White

Red

Controller Box

Inverter

circuit

detection

(MAIN board)

Control circuit board

5:Trouble

4:Compressor ON/OFF

SNOW

NIGHT

(INV board)

Power circuit board

Gate amp board

(G/A board)

Black

White

Red

Motor

(Compressor)

Diode

stack

Terminal

Block

BOX BODY

X10

2A F

1A F

2A F

(3P)

CN20

DS

CNTR1

123

T01

F3

250VAC

CNTR

(3P)

L1 L2 L3 N

L1

TB1B

L2L3NN

L3

L2

L1

Red White Black

12345

CNLV2

(5P)

123

(3P)

CN03

1234

CN05

(4P)

CNE

(2P)

21

(14P)

CN15V2

(7P)

CNRS3

(6P)

CNVCC2

(6P)

CNVCC3

(2P)

CNVCC4

(7P)

CNRS2

X01

32165

1234567121432

9876432112

3

V

MC1

W U

(4P)

CNVDC

(3P)

CN52C

(5P)

CNAC2

(2P)

CNVCC4

250VAC

F01

6

5

1234567121432

CNDC1

(4P)

1234

12345987612345

CNDR2

(9P)

14131110 12

121011 1314

543216789 54321 6789

5

123

4

UVW

P

N

IPM

CNDR1

(9P)

CN15V1

(14P)

4

CNACCT

(4P)

543

1

21678

3

12 1 2 3 1 2 3 1234 5

2

34251

1

CN3D

(3P)

32

CN51

(5P)

12V

F1

250VAC

123

Black

White

Red

123

~~-~

+

ZNR4

C1

R5 R1

52C1

+

DCL

C2

C3

R2

R3

CN02

(8P)

CN01

(2P)

CNH

(3P)

CNL

(3P)

CNLV1

(5P)

CN06CN0912(2P)

12

(2P)

3

(2P)

CN07

21

U

W

MC2

V

1

3

5

6

4

2

6

5

4

3

2

1

52C2

51C2

-W

ACCT

-U

ACCT

12345

6

12345

412

3

X02

X03

3

2

1

2

3

5

4

1

2

3

1

2

3

52C2

X01

9695

A2A1

1314

A1A2

CNFAN

(3P)

321

X02

L2

R7

THHS

R6

(2P)

CN30V

(2P)

CNL2

12 123 12 12

(2P)

CNTH

(3P)

CNR

BOX BODY

FB2FB1

T1

T2

T3

T4

T5

T6

T8

BOX BODY

63H2

T7

8765432

1

A B

X12

SV7

SV8

X11

CN06

Y-C

board

CN05

FLAG8

FLAG7

FLAG6

FLAG5

FLAG4

FLAG3

FLAG2

FLAG1

sor run

Compres-

52FSV6SV4

SV1

21S4a

FLAG8FLAG7FLAG6

FLAG5FLAG4FLAG3FLAG2

ON:1

OFF:0

FLAG8 always

lights at

microcomputer

power ON

Always

lighting

52C2

Display at LED lighting (blinking) Remarks SW1 operation

During

FLAG1

Display

Check display1

(Blinking)

Relay output

display

(Lighting)

LD1

Display the address and error code by turns

❇

Please refer to the service handbook about other switch settings of LED display.

12345678910

ON:1

OFF:0

(at factory shipment)

12345678910

SV22/32

❇

1

52C1

CH2,3

(Upside)

(Front)

(Underside)

21S4b

SV5b

SV5b is closed

when FLAG3 is

turned ON.

Name

Appliance

"

❇

1" is not existedPUHY-(P)400YEM

PUHY-(P)500YEM

All exists

PUHY-(P)400YEM

PUHY-(P)500YEM

"

❇

1","

❇

2" and "

❇

3" are not existed

"

❇

2" and "

❇

3" are not existed

NOTE:Mark

indicates terminal bed

connector

board insertion connector

TerminalT1~10

Intelligent power moduleIPM

Choke coil(Transmission)L2

High pressure switch63H1,2

63LS Low pressure sensor

High pressure sensor63HS

Electronic expansion valve(SC coil)

LEV1

FB1~5 Ferrite core

Earth terminal

X1,2,4~12 Aux. relay

SSR

CH2,3

Solid state relay

Cord heater

CH11,12

Crank case heater(Compressor)

LD

Accumulator liquid level detect

(Inverter main circuit)

Electronic expansion valve(Oil return)

SLEV

4-way valve21S4a,4b

Fan motor (Radiator panel)MF1

52F

Magnetic contactor(Fan motor)

Overload relay51C2

Magnetic contactor52C2

VaristorZNR4

Current SensorACCT-U,W

Symbol

Name

Radiator panel temp. detect

THHS

(Heat exchanger capacity control)

Compressor shell temp.

TH10c

Solenoid valve

SV5,6,7,8

TH10b

Gas pipe temp.

(Hex outlet)

TH10a

4,6

SV1,22,32

Solenoid valve

Composition sensing temp.

TH9b

LEV1 temp.detect(Enttance area)

TH9a

(Bypass exit area)

TH8

SC coil temp.detect

TH7

(Liquid exit area)

SC coil temp.detect

OA temp. detectTH6

52C1

Magnetic contactor

Pipe temp. detect(Hex outlet)

TH5

TH4

temp. detect

Upper

TH3

Accumurator liquid

Lower

DCL

(Power factor improvement)

Saturation evapo. temp. detect

TH2

DC reactor

Discharge pipe temp. detect

ThermistorTH11,12

Symbol

Name

TH9b

TH7

63LS

❇

3

TH11

TH10c

❇

3

X12X11

T01

❇

2

-23-

PUHN-(P)200, 250YEM(K,C)-A

TERMINAL

T1,T2

T1

T2

Box body

123

N

Fan motor

(Heat exchanger)

V

CN04

MF

W

U

CNMF

Model 200:24A

Model 250:27A

Appliance

Difference

PUHN-200·250YEM(K,C)-A(-BS,-BF)

"

✻

1

" is not existed

PUHN-P200·250YEM-A(-BS,-BF)

ALL exists

L2L1L3

PE

5

G

K G

K

G

K G

K

G

K G

K

WG2

UK1

UG2

SCRM

UG1

UK2

WK1

WK2WWG1

VK1

VG1

VK2

VG2

V

U

L1

Red

L2

F2

L1

L3

L2

F1

600VAC

8A F

L3

4

123

600VAC

8A F

Black

Red

UG2

4

White Black

5

UG1

UK1

UK2

5

6

5432112345

321

WG2

Fan control board

(Fancon board)

WK2

WG1

WK1

VG2

VK2

VG1

VK1

and ON for Model 250.

SW3-10 are OFF for Model 200.

12

1421 323 241 123 678 12 1 2 3 12345 12

1

345

23456

CN09

(2P)

CN06

(2P)

1

3

CN20

(3P)

2

CNFC1

(6P)

2

3

2 1

CNS1

(2P)

123

12

CN38

(3P)

X01

N

L3

Power source

3N~380/400/415V

50/60Hz

Control circuit board

(CONT board)

LEV2

L2

F1

250VAC

6.3A F

63H

TH11TH7TH8TH5

TH6

TH3TH4TH9

123

Black

White

Red

63LS

L1

LEV1

PE

TB1

White

Red

Black

Blue

Inverter

unit

Box body

TB3

M1

M2

T01

F3

250VAC

1A F

White

U

W

MC1

V

Motor (Compressor)

Red

Black

CN05

(4P)

CN03

(3P)

CN02

(8P)

CN01

(2P)

CNL

(3P)

CN33

(6P)

CNLV1

(5P)

CNTR

(2P)

CNLV2

(6P)

Controller Box

CNW

(5P)

CNV

(5P)

CNFC2

(6P)

CNU

(5P)

1

3

5

6

4

2

6

5

4

3

2

1

CN12

TH10b

12

(2P)

TH10a

12332154321

6

654

S

X02

SV1

51C

CN46

(3P)

CNCH11

(3P)

CH11

52C1

CN52C1

(5P)

X06

X07

52C151C1

13 14

A1

A2

Detection

circuit

Detection

circuit

ZNR01

L1L2L3

CH3

CH2

X05

X04

SSR01

12

34

321

12345

6

(6P)

CN34

(3P)

CN35

3

CN39

(3P)

2

1

X03

SV3

SV2

SV4

SV

5b

21

S4

52

C1

NF

Noise

Filter

THERMISTER

SV2,SV3

SOLENOID VALVE

21S4

MF

MC1

52C1

SSR

CH11

CH2,CH3

ZNR01

SV5b

63H

63LS

SV1,SV4

TH11

TH3

TH4

TH5

TH6

TH7

TH8

TH10a

TH10b

TH9

X01~X07

SW2,SW3

SWU1,2

TB1

LEV1

LEV2

THERMISTER

F3

THERMISTER

ELECTRONIC EXPANSION VALVE

RELAY

SWITCH

POWER SOURCE TERMINAL BLOCK

EARTH TERMINAL

THERMISTER

LOW SIDE PRESSURE SENSOR

HIGH PRESSURE CUT OUT SWITCH

SOLENOID VALVE

4-WAY VALVE

CORD HEATER

CRANK CASE HEATER(COMPRESSOR)

FAN MOTOR(HEAT EXCHANGER)

ELECTRIC MOTOR OF COMPRESSOR

OVER CURRENT RELAY

MAGNET CONTACTOR

FUSE(1A)

SOLID STATE RELAY

VARISTOR

THERMISTER

ELECTRONIC EXPANSION VALVE

THERMISTER

NAME

SYMBOL

F1,F2

FUSE(8A)

F1

FUSE(6.3A) <CONT BOARD>

SYMBOL

NAME

SOLENOID VALVE

51C1

✻

1

✻

1

-24-

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Inlet

Accumulator

Outlet

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

Low pressure saturation temperature (TH2)

Upper (TH4)

Liquid level

Lower (TH3) Shell bottom (Comp No.1/No.2) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9a)

CS circuit (TH9b)

Circulating configuration (αOC) LEV inlet Heat exchanger outlet

27.0/19.0 27.0/19.0

35.0/- 35.0/-

5 5

5

55 55

22.4 27.9

5 5

5

7

3

27.6/26.2/25.2 34.6/32.8/31.7

164 179 200 344

2.11/0.43 2.11/0.42

92/102 97/102

42

4

6

6/12 12/12

1

30

1

60/51 65/50

27

10 11

2

16

0.23 26 12

125 125 100 63 32 125 125 125 100 32

10 10 10 10 10 10 10 10 10 10

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

410 410 360 360 340 410 410 410 360 280

DB/WB

Set

-

m

-

kg

A

V

Pulse

°C

Outdoor unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor

Quantity

Quantity in operation

Model Main pipe

Branch pipe

Total piping length

Outdoor unit

Sectional temperature

Pressure

LEV opening

Indoor unit fan notch Refrigerant volume

Total current

Voltage

Indoor unit SC (LEV1) Oil return (SLEV)

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

380 ~ 415 380 ~ 415

PUHY-P400YEM-A PUHY-P500YEM-A

[4] Standard Operation Data

1 Cooling operation

MPa

-25-

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9a) CS circuit (TH9b) Circulating configuration (αOC) Discharge temperature (TH11)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9) LEV inlet Heat exchanger outlet

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

MPa

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-P600YSEM-A PUHY-P700YSEM-A

PUHY-P400YEM-A PUHY-P500YEM-A

PUHN-P200YEM-A PUHN-P200YEM-A

27/19.0

35/-

5 5

200/200/125/50/25 250/200/125/100/25

5 5

30

Hi

28.9 34.9

41.5/39.5/38.0 48.3/45.9/44.2 380 ~ 415

360/360/410/360/270 410/360/410/360/270

164 179

5 7

1

200 344

116

60

2.11/0.45 2.11/0.44 92/102 97/102

42 6 8

7/13 13/13

2

30 2

60/51 65/50

27

11 10

3

16

0.23 102

30

4 50 27 13

5 26 12

Variable capacity

Constant capacity

-26-

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9a) CS circuit (TH9b) Circulating configuration (αOC) Discharge temperature (TH11)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9) LEV inlet Heat exchanger outlet

27/19.0

35/-

5 5

250/200/125/50/25 250/250/125/100/25

5 5

30

Hi

31.9 36.9

44.7/42.5/40.9 51.5/48.9/47.1 380 ~ 415

410/360/410/360/270 410/410/410/360/270

164 179 200 344

116

60

2.11/0.45 2.11/0.44 92/102 97/102

42 6 8

7/13 13/13

5 7

1

2

30 2

60/51 65/50

27

11 10

2

3

16

0.23 102

30

3 50 27 12

4 26 12

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

-

V ariable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

MPa

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-P650YSEM-A PUHY-P750YSEM-A

PUHY-P400YEM-A PUHY-P500YEM-A

PUHN-P250YEM-A PUHN-P250YEM-A

Variable capacity

Constant capacity

-27-

27.0/19.0 27.0/19.0

35.0/- 35.0/-

5 5

5

55 55

5

5 5

9 5

5

22.4 27.9

27.6/26.2/25.2 33.7/32.0/30.8

164 179

344

1.96/0.43 1.96/0.42

90/95 95/100

42

2 4

4/10 10/10

3

30

3

60/51 65/50

27

8 4

26 10

DB/WB

Set

-

m

-

kg

A

V

Pulse

MPa

°C

Outdoor unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor

Quantity

Quantity in operation

Model Main pipe

Branch pipe

Total piping length

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Inlet

Accumulator

Outlet

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

Low pressure saturation temperature (TH2)

Upper (TH4)

Liquid level

Lower (TH3)

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

SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9) LEV inlet Heat exchanger outlet

Outdoor unit

Sectional temperature

Pressure

LEV opening

Indoor unit fan notch Refrigerant volume

Total current

Voltage

Indoor unit SC (LEV1)

Oil return (SLEV)

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

125 125 100 63 32 125 125 125 100 32

10 10 10 10 10 10 10 10 10 10

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

430 430 380 380 350 430 430 430 380 290

380 ~ 415 380 ~ 415

PUHY-400YEM(K,C)-A PUHY-500YEM(K,C)-A

-28-

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9) Discharge temperature (TH11)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9) LEV inlet Heat exchanger outlet

-

V ariable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-600YSEM-A PUHY-700YSEM-A

PUHY-400YEM-A PUHY-500YEM-A

PUHN-200YEM-A PUHN-200YEM-A

27/19.0

35/-

5 5

200/200/125/50/25 250/200/125/100/25

5

5 30 Hi

28.9 34.9

40.4/38.4/37.0 47.4/45.0/43.4 380 ~ 415

380/380/430/380/280 430/380/430/380/280

164 179

344 116

60

1.96/0.45 1.96/0.44 90/95 95/100

3 5

3

42 4 6

5/11 11/11

4

30 4

60/51 60/50

3

8 4

27 9 5

100

30

6 50 27 11

7 26 10

Variable capacity

Constant capacity

MPa

-29-

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9) Discharge temperature (TH11)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) SCC outlet (TH7) Bypass outlet (TH8) Bypass inlet (TH9) LEV inlet Heat exchanger outlet

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

MPa

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-650YSEM-A PUHY-750YSEM-A

PUHY-400YEM-A PUHY-500YEM-A

PUHN-250YEM-A PUHN-250YEM-A

27/19.0

35/-

5 5

250/200/125/50/25 250/250/125/100/25

5 5

30

Hi

31.9 36.9

43.6/41.4/39.9 50.5/48.0/46.3 380 ~ 415

430/380/430/380/280 430/430/430/380/280

164 179

344 116

60

1.96/0.45 1.96/0.44 90/95 95/100

3 5

3

8 4

42 4 6

5/11 11/11

4

30 4

60/51 65/50

27 9 5

100

30

5 50 27 10

6 26 10

Variable capacity

Constant capacity

-30-

Discharge (TH11/TH12)

Heat exchanger inlet (TH5)

Inlet

Accumulator

Outlet

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

Low pressure saturation temperature (TH2)

Upper (TH4)

Liquid level

Lower (TH3)

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

CS circuit (TH9b)

Heat exchanger gas line (TH10a/TH10b)

Circulating configuration (αOC)

Heat exchanger inlet

LEV inlet

125 125 100 63 32 125 125 125 100 32

10 10 10 10 10 10 10 10 10 10

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

420 420 330 490 320 420 420 420 330 320

20.0/- 20.0/-

7.0/6.0 7.0/6.0

5 5

5

55

5

22.4 27.7

25.6/24.3/23.4 32.1/30.5/29.4

0

122

2.11/0.35 2.11/0.31

88/93 88/93

– 3 – 1

– 6 – 7

– 5/2 – 5/0

– 10

30

– 6

43/45 40/33

5

– 6/– 6 – 7/– 7

0.28

81 34

DB/WB

Set

-

m

-

kg

A

V

Pulse

MPa

°C

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor

Quantity

Quantity in operation

Model Main pipe

Branch pipe

Total piping length

Outdoor unit

Indoor unit

Outdoor unit

Sectional temperature

Pressure

LEV opening

Indoor unit fan notch Refrigerant volume

Total current

Voltage

Indoor unit

SC (LEV1)

Oil return (SLEV) High pressure/Low pressure

(after O/S) (before MA)

380 ~ 415 380 ~ 415

PUHY-P400YEM-A PUHY-P500YEM-A

2 Heating operation

-31-

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) CS circuit (TH9b) Heat exchanger gas line

(TH10a/TH10b) Circulating configuration (αOC) Discharge temperature (TH11) Suction (Comp)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) Heat exchanger gas line

(TH10a) Heat exchanger inlet LEV inlet

20/-

7/6

5 5

200/200/125/50/25 250/200/125/100/25

5

5 30 Hi

28.9 34.9

37.0/35.2/33.9 43.9/41.7/40.2 380 ~ 415

330/330/420/430/270 420/330/420/330/270

0

122 198

0

500

2.11/0.34 2.11/0.34 88/93

– 3 – 1 – 5 – 6 – 5 – 6

– 5/2 – 6/0

– 9 – 10

30

– 5 – 6

43/45 40/33

5

– 5/– 5 – 6/– 6

0.28 93

1

30

– 5

33

– 1

81 34

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

MPa

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-P600YSEM-A PUHY-P700YSEM-A

PUHY-P400YEM-A PUHY-P500YEM-A

PUHN-P200YEM-A PUHN-P200YEM-A

Variable capacity

Constant capacity

-32-

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) CS circuit (TH9b) Heat exchanger gas line

(TH10a/TH10b) Circulating configuration (αOC) Discharge temperature (TH11) Suction (Comp) (No.1/No.2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) Heat exchanger gas line

(TH10a) Heat exchanger inlet LEV inlet

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

-

V ariable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

kg/cm

2

G

(MPa)

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-P650YSEM-A PUHY-P750YSEM-A

PUHY-P400YEM-A PUHY-P500YEM-A

PUHN-P250YEM-A PUHN-P250YEM-A

20/-

7/6

5 5

250/200/125/50/25 250/250/125/100/25

5 5

30

Hi

31.9 37.9

42.0/39.9/38.5 48.3/45.9/44.2 380 ~ 415

420/330/420/430/270 420/420/420/330/270

0

122 198

0

800

21.5/3.5 21.5/3.5

(2.11/0.34) (2.11/0.34)

88/93

– 3 – 1 – 5 – 6 – 5 – 6

– 5/2 – 6/0

– 9 – 10

30

– 5 – 6

43/45 40/33

5

– 5/– 5 –

6/

– 6

0.28 93

0

30

– 6

33

– 2

81 34

Variable capacity

Constant capacity

-33-

20.0/- 20.0/-

7.0/6.0 7.0/6.0

5 5

5

55 55

22.4 27.7

25.1/23.9/23.0 31.5/29.9/28.8

0

122

1.77/0.35 1.77/0.31

85/90 85/90

7

– 4 – 5

– 3/4 – 3/2

– 4

30

– 4

43/45 40/33

9

0

5 5

5

– 4/– 4 – 5/– 5

78

37

125 125 100 63 32 125 125 125 100 32

10 10 10 10 10 10 10 10 10 10

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

420 420 330 490 320 420 420 420 330 320

Discharge (TH11/TH12)

Heat exchanger inlet (TH5)

Inlet

Accumulator

Outlet

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

Low pressure saturation temperature (TH2)

Upper (TH4)

Liquid level

Lower (TH3) Shell bottom (Comp No.1/No.2) Heat exchanger gas line

(TH10a/TH10b) Heat exchanger inlet

LEV inlet

DB/WB

Set

-

m

-

kg

A

V

Pulse

MPa

°C

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor

Quantity

Quantity in operation

Model Main pipe

Branch pipe

Total piping length

Outdoor unit

Indoor unit

Outdoor unit

Sectional temperature

Pressure

LEV opening

Indoor unit fan notch Refrigerant volume

Total current

Voltage

Indoor unit

SC (LEV1)

Oil return (SLEV)

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

380 ~ 415 380 ~ 415

PUHY-400YEM(K,C)-A PUHY-500YEM(K,C)-A

-34-

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) Heat exchanger gas line

(TH10a/TH10b) Discharge temperature (TH11) Suction (Comp)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) Bypass inlet (TH9) Heat exchanger gas line

(TH10a) Heat exchanger inlet LEV inlet

-

V ariable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

MPa

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-600YSEM(K,C)-A PUHY-700YSEM(K,C)-A

PUHY-400YEM(K,C)-A PUHY-500YEM(K,C)-A

PUHN-200YEM(K,C)-A PUHN-200YEM(K,C)-A

20/-

7/6

5 5

200/200/125/50/25 250/200/125/100/25

5 5

30

Hi

28.9 34.9

9

36.5/34.7/33.4 43.2/41.0/39.6 380 ~ 415

350/350/440/450/280 440/350/440/350/280

0 198 100 500

1.76/0.34 1.76/0.34 85/90

7

– 3 – 4 – 3 – 4

– 3/4 – 4/2

– 3 – 4

30

– 3 – 4

43/45 40/33

– 3/– 3 – 4/– 4

90

3

30

– 3

33

– 3 – 3

78 37

Variable capacity

Constant capacity

-35-

Variable capacity

unit

Constant capacity unit

Indoor unit

Outdoor unit

Items

Ambient temp.

Indoor unit

Piping

Condition

Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outlet Suction (Comp) Low pressure saturation

temperature (TH2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) Heat exchanger gas line

(TH10a/TH10b) Discharge temperature (TH11) Suction (Comp) (No.1/No.2)

Liquid level

Upper (TH4)

Lower (TH3) Shell bottom (Comp) Bypass inlet (TH9) Heat exchanger gas line

(TH10a) Heat exchanger inlet LEV inlet

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A V

Pulse

°C

Outdoor

unit

Sectional temperature

Pres-

sure

LEV opening

Indoor unit fan notch Refrigerant volume Current Voltage Indoor unit

SC (LEV1) Oil return (SLEV) SC (LEV1) Liquid pipe (LEV2)

High pressure/Low pressure (after O/S) (before Main ACC)

PUHY-650YSEM(K,C)-A PUHY-750YSEM(K,C)-A

PUHY-400YEM(K,C)-A PUHY-500YEM(K,C)-A

PUHN-250YEM(K,C)-A PUHN-250YEM(K,C)-A

20/-

7/6

5 5

250/200/125/50/25 250/250/125/100/25

5 5

30

Hi

31.9 36.9

40.0/38.0/36.6 46.6/44.3/42.7 380 ~ 415

440/350/440/450/280 440/440/440/350/280

0 198 100 800

9

1.76/0.34 1.76/0.34 85/90

7

– 3 – 4 – 3 – 4

– 3/4 – 4/2

– 3 – 4

30

– 3 – 4

43/45 40/33

– 3/– 3 – 4/ – 4

90

2

30

– 4

33

– 4 – 4

78 37

Variable capacity

Constant capacity

MPa

-36-

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

SWU 1 ~ 2

SW1

1 ~ 8

8 ~ 9

5 ~ 6

Refer to LED monitor displa

❇

table 1

❇

table 1

❇

table 1

y on the outdoor board.

9 ~ 10

SW2

1

2

3

4

7

10

SW3

1

2

3

4

5

6 7

10

SW4

1

2

3

4 5 6

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

-

Model 400

SW4-3 Function invalid

Display variable capacity unit operations.

Big Y Setting

-

[5] Function of Dip SW and Rotary SW

(1) Outdoor unit PUHY-P600·650·700·750

YSEM-A.

PUHY-P400·500YEM-A.

MAIN 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.

– 10°C

12°C

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

-

Model 500

SW4-3 Function valid

Display constant capacity unit operations.

Super Y Setting

-

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

Unit Address Setting For self diagnosis/ operation monitoring

Centralized Control Switch Deletion of connection information.

Deletion of error history.

• Adjustment of Refriger-

ant Volume

• Ignore liquid level errors

Forced defrosting

Reset of the time the CS circuit is closed. SW3-2 Function Valid/ Invalid Indoor Unit Test Operation

Defrosting start temperature . Defrosting end temperature.

Target low-pressure change Pump Down Function Target high-pressure change

-

Models SW4-3 Function valid/ Invalid Change service LED

Configuration compensation Auto changeover function

value

Switch Target low-pressure change

Models

-

Switch Function

During normal operation when power is on.

Invalid 2 hours after compressor starts.

Before power is turned on.

-

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. 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. During normal operation when

power is on.

During normal operation when power is on.

When SW4-1 is ON

--

Bef

Ordinary control Auto changeover Valid When switching on the power

ore power is turned on.

-

During normal operation when power is on.

10 minutes or more after compressor starts.

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

Note 1: Factory setting is SWU 1 to 2 = 00, SW3 - 10 = set by model.

Note 2: If the address is set from 01 to 50, it automatically becomes 100.

Note 4: When Auto changeover function is valid, Operating mode is

decided by the indoor unit which address number is minimum.

Note 3: Factory settings are SW4-6 = OFF, setting = BIG Y.

When operating in Super Y mode, turn SW4-6 ON.

All other switches are set to OFF.

1 Variable capacity unit

7 ~ 8

Evaporation temp. (˚C)

Dip SW

0 ~ 4

3

~ 54 ~ 74 ~ 8 OFF OFF OFF OFF

OFF OFF

ON

OFF ON

ON

ON ON ON ON

OFF OFF

ON

OFF ON

OFF

ON

OFF

ON

ON –1

~ 3

–5 ~ 1 –6

~ 0

–2

~ 2

–4

~ 2

–7

~ –1

–8

~ –2

-37-

Function According to Switch Operation Switch Set Timing

When Off When On When Off When On

SWU 1 ~ 2

SW2

1 2 3 4

5 6 7

8 9

10

SW3

1 2 3

4

5

6 7 8 9

10

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.

-

Ignore liquid level errors

-

Start forced defrosting.

-

– 10°C

12°C

Ignore oil-equalization circuit irregularities

-

R407C Model

Model 250

-

Ordinary control

-

Ordinary control

-

– 8°C

7°C

Ordinary control

-

R22 Model

Model 200

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. (Except during defrosting) During normal operation when power is on.

-

Before power is turned on.

When switching on the power.

Unit Address Setting

-

Ignore liquid level errors

-

Forced defrosting

-

Defrosting start temperature. Defrosting end temperature. Ignore oil-equalization circuit irregularities

-

Models (Refrigerant)

Models (Capacity)

Switch Function

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

During normal operation when power is on.

Invalid 2 hours after compressor starts.

2 Constant Capacity Unit

-38-

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

Ordinary control

-

Ordinary control

-

Valid during normal operation SW3-2 Function Invalid

Stop all indoor units.

0°C

7°C

Ordinary control

-

Model 400

Display variable capacity unit operations.

-

Big Y Setting

-

When Off When On When Off When On

SWU 1 ~ 2

SW1

1 ~ 8

Refer to LED monitor display on the outdoor board.

9 ~ 10

SW2

1

2

3

4

5 6 7

8 9

10

SW3

1

2

3

4

5

6 7

8 9

10

SW4

1 2

3 4 5 6 7 8 9

10

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.

-

note: 3

SW3-2 Function Valid

All indoor units test run ON.

– 2°C

12°C

Evaporation temperature / 2°C lower than normal

High pressure / 1.5 ~ 2.5 K higher than normal

-

Model 500

Display constant capacity unit operations.

-

Super Y Setting

-

Unit Address Setting For self diagnosis/ operation monitoring

Centralized Control Switch Deletion of connection information.

Deletion of error history.

• Adjustment of Refriger-

ant Volume

• Ignore liquid level errors

-

Forced defrosting

-

Preserve suction pressure

SW3-2 Function Valid/ Invalid Indoor Unit Test Operation

Defrosting start temperature. Defrosting end temperature.

Target low-pressure change

Target high-pressure change

-

Models

Change service LED

-

Switch Models

-

Switch Function

During normal operation when power is on.

Invalid 2 hours after compressor starts.

PUHY-600·650·700·750 YSEM(K,C)-A. PUHY-400·500YEM(K,C)-A. 1 Variable Capacity Unit

MAIN board

Function According to Switch Operation Switch Set Timing

Before power is turned on.

-

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. 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.

During normal operation when power is on.

-

When switching on the power.

During nor

Ordinary control Auto changeover Valid

Auto changeover function

When switching on the power.

mal operation when power is on. When SW4-1 is ON

--

-

Before power is turned on.

-

During normal operation when power is on.

10 minutes or more after compressor starts.

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

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. Note 3: The oper

Note 5: When Auto changeover function is valid, operating mode is decided by the indoor unit which

address number is minimum.

ation cumulative time of compressor is effective to it only within 1 hour.

Note 4: Factory settings are SW4-6 = OFF, setting = Y.

When operating in Super Y mode, turn SW4-6 ON.

-39-

Function According to Switch Operation Switch Set Timing

When Off When On When Off When On

SWU 1 ~ 2

SW2

1 2 3 4

5 6 7

8 9

10

SW3

1 2 3

4

5

6 7 8 9

10

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.

-

Ordinary control

-

Ordinary control

-

0°C

7°C

Ordinary control

-

R22 Model

Model 200

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. (Except during defrosting) During normal operation when power is on.

-

Before power is turned on.

When switching on the power.

-

Ignore liquid level errors

-

Start forced defrosting.

-

– 2°C

12

Ignore oil-equalization circuit irregularities

-

R407C Model

Model 250

Unit Address Setting

-

Ignore liquid level errors

-

Forced defrosting

-

Defrosting start temperature. Defrosting end temperature. Ignore oil-equalization circuit irregularities

-

Models (Refrigerant)

Models (Capacity)

Switch Function

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

During normal operation when power is on.

Invalid 2 hours after compressor starts.

2 Constant Capacity Unit

°C

-40-

(2) Indoor unit

DIP SW1, 3

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

14 16 20 25 28 40 50

SW2 setting

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

45 681013

SW2 setting

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

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

table below.)

Note 2: 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

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

– –

Room temp. sensor position Clogged filter detect. Filter duration OA intake Remote display select. Humidifier control Heating thermo. OFF airflow 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

–

Heating 4deg up

– –

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

SW1

SW3

1 2 3 4 5 6 7 8

9

10

1

2

3 4 5 6 7 8 9

10

Switch SW name

Operation by SW

Switch set timing

OFF ON OFF ON

Remarks

At unit stopping

(at remote

controller OFF)

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

Model

Switch

SW1

SW3

3 6 7 3 4 6 8

PLFY-P

VBM-A

OFF OFF

VLMD-A

VKM-A

OFF

ON

OFF

OFFONON

PEFY-P

VML-A VMH-A

20~80VMM-A

100~140VMM-A

OFF

OFF ON

ON

OFF OFF

OFF

ON OFF

ON OFF ON

ON

OFF

PDFY-P

PFFY-P PCFY-P

PKFY-P

VM-A

ON

VLRM-A, VLEM-A

OFF

VGM-AONVAM-A VGM-A

OFF

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.)

Note 3 :

OFF

ON

-41-

Ceiling height 3 3.5 m 2 2.8 m 1 2.3 m

Setting of DIP SW4 Setting of DIP SW5

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

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

Model Circuit board used

SW4

Switch Function Operation by switch Switch set timing

SWA

SWB

SWC

Ceiling height setting

External static pressure setting

For options

Setting of air outlet opening

Airflow control

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

(PLFY-P-VLMD-A)

(PLFY-P-VKM-A)

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

Phase control

Relay selection

❇

The ceiling height is changed by SWB setting.

❇

As this switch is used by interlocking with SWC, refer to the item of SWC for detail.

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

❇

Set to the option to install the high efficiency filter

Always after powering

3

1

2

2-way

4-way

3-way

3

1

2

3

1

2

3

1

2

220V 240V

Option

Standard

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

100Pa

50Pa 30Pa

❇

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

-42-

£

TEST RUN

[1] Before T est Run

(1) Check points before test run

1 There should be neither refrigerant leak nor loose power source or transmission lines.

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: Close the cap, after opening the valve.

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.

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

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

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.

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 portions, 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.

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.

1

2

1

2

3

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)

(❇1) Capability of the connected indoor units

Remote controller type

Number of connected indoor units that

can be connected without a RP.

Shorter powering time causes compressor trouble.

-43-

(3) Check points for test run when mounting options

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

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

water lifting-up mechanism

Mounting of permeable film humidifier

Release connector of pump circuit, check error detection by pouring water into drain pan water inlet.

After that, connect connector of circuit.

Check pump operations and drainage status in cooling (test run) mode.

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

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

No overflow from drain pan. Drain water comes out by operation 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.

Work Content of test run Check point Result

Disassembling and assembling of drain water lifting-up mechanism

Mounting of float switch

Electric wiring

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 pan and piping cover mounted without gap?

Drain pan hooked on cut projection of the mechanism?

No mistakes in wiring? Connectors connected securely and

tightly? No tension on lead wire when sliding

control box?

Float switch moves smoothly.

Float switch is mounted on mounting board straight without deformation.

Float switch does not contact with copper pipe.

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

1

2

3

1

2

3

4

5

1 2

3

1 2

3

No gap

Insulation pipe

Float switch should be installed without contacting with drain pan?

-44-

(5) Check points for system structure

In the case of the PUHY-(P) 400·500 YEM(K,C)-A Check points from installation work to test run.

Classification Portion Check item Trouble

Installation and piping

Power source wiring

1

2

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.)

Specified switch capacity and wiring diameter of main power source used?

Proper grounding work done on outdoor unit?

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

L line and N line connected correct?

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.

Error stop, not operate.

Some electric parts will be damaged.

1 2 3 4

3

4

5

6

7

8

1

2

3

4

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?

Connecting piping size of branch piping correct?

57

246

Switch

Breakers for Current Leakage

Power source for outdoor unit

PE

246

Power source for indoor unit

-45-

Classification Transmission

line

Portion Check item

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

™ 1.25mm

2

or more transmission line used?

(Remote controller 10m or less 0.75mm

2

)

2-core cable used for transmission line?

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

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

• MA Remote controller : TB15

• M-NET Remote controller : TB5

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.

System set

Before starting

Error stop or not operate. (❇1 case of R2 / WR2 / BIGR2 series)

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.

1

2

1

2 3

4

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? Tur ned 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?

❇

1

5

3

8

•

¡

£

¢ ∞

§

¶

•

4

1 2 3

-46-

MAIN board

Outdoor unit

2

1

6

12345

12

In the case of the PUHY-(P) 600·650·700·750 YSEM(K,C)-A Check points from installation work to test run.

Classification Portion Check item Trouble

Installation and piping

Power source wiring

1

2

3

4

5

6

7

8

1

2 3

4

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.

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.

L line and N line connected correct?

Some electric parts will be dameged.

❇

Limitations apply when 17 or more indoor units are connected. Please refer to the installation manual.

3 4

57

The phase of the L line (L1,L2,L3) is correct.

Power source for indoor unit

1

246

Switch

Breakers for Current Leakage

Power

source

for

outdoor

unit

PE

-47-

Classification Portion Check item

Transmission line

System set

Before starting

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

1.25 mm2 or more transmission line used? (Remote controller 10 m or less 0.75 mm

2

)

2-core cable used for transmission line?

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

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.)

No connection trouble in transmission line?

Address setting properly done? (Remote controller, indoor unit 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, oil balance pipe) opened? Turn on power source 12 hours before starting opera-

tions?

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 oper

Connection of wrong remote controller line terminals

• MA Remote control: TB15

• M-NET Remote control: TB5

Never Finish initial mode

ate.

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.

1

2

3

4

5 6

7

1

2

3

4

1

Trouble

8

5

8

3

5

8

•

4

-48-

[2] Test Run Method

Operation procedure

1

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

2 Press

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

3 Press

selection button → Make sure that air is blowing out

4

Press select button to change from cooling to heating operation, and vice versa → Make sure that warm or cold air is blowing out

5 Press

adjust button → Make sure that air blow is changed

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

button to cancel test run → Stop operation

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

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

adjust button, depending on the model, “NOT AVAILABLE” may be displayed on remote

controller. However, it is not a malfunction.

6: When pressing

or button, depending on the model, “NOT AVAILABLE” may be displayed on

remote controller. However, it is not a malfunction.

TEST RUN

ON/OFF

-49-

¢

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:

Registration/ ordinary mode selector switch

Registration/ordinary mode selection switch

Switch to assign indoor unit address

Registration switch

Confirmation switch

Delete switch

Registered mode selector switch

Switch to assign interlocked unit address

A

+

B

C

D

E

F

G

H

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 + switch displays “CENTRALLY CONTROLLED”.

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

This switch is used for group/interlocked registration.

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.

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

Symbol

of switch

G

Registered mode selector switch

E

Confirmation switch

C

Switch to assign indoor unit address

Switch to assign inter-

locked unit address

Registration switch

+

FILTER

TEST RUN

Name Name of actual switch Description

of TEMP

of TIMER SET

CLOCK → ON → OFF

Registration/ ordinary mode selector switch

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

F

Delete switch

FILTER

D

A

B

H

-50-

(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 (PUHY) Outdoor unit (PUHN) 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.)

OA Processing LOSSNAY

-51-

(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]

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

switch ( + ) at the same time for 2 seconds to change to the registration mode. (See the figure below.) Assign the indoor unit address to “INDOOR UNIT ADDRESS NO.” by operating the

(Room temperature adjustment) ( ). Then press the switch ( ) to register. In the figure below, the “INDOOR UNIT ADDRESS NO .” is being set to 001. After completing the registration, press the +

switch ( ) at the same time for 2 seconds to

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

• Remote controller under stopping • “HO” under displaying

Ordinary mode

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

˚C

Group setting mode

• Confirm the indoor unit address No.

• Confirm the connection of the transmission line.

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

˚C

• Registration complete

• Registration error

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

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

Assign the address ( )

Change to the registration mode ( )

Press the registration switch ( )

Remote controller

▲

▼

System example

Indoor units

Group

+

ON/OFF

TEMP

FILTER

CHECK TEST

ON OFF

CLOCK

PAR-F27MEA

TIMER SET

FILTER

TEST RUN

+

1

2

3

AB

C

D

BA

11

23

213

DBA

C

-52-

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

2

3

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

+

switch

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

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

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

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

After completing the registration, continuously press the +

switch ( + ) at the same time for

2

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

• 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]

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

switch

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

Operate

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

Assign the unit address of which registration information is desired to confirm with the

(TIMER SET) switch ( ). Then press the switch ( ) to display it on the remote controller. (See figure below.) Each pressing of switch ( ) changes the display of registered content. (See figure below.) After completing the retrieval/confirmation, continuously press the +

switch ( + ) at the same

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

time

• Registered

• No registration.

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

˚C

▲

▼

Press the switch for confirmation ( )

Note: Only one address will be displayed

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

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

ON/OFF

TEMP

FILTER

CHECK TEST

ON OFF

CLOCK

PAR-F27MEA

TIMER SET

FILTER

group

(

A

(

B

A

E

1

E

1

2 3

4

B

A

B

A

E

G

H

-53-

3) Method of deletion

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

[Operation procedure]

With the remote controller under stopping or at the display of “HO”, continuously press the + switch ( + ) at the same time for 2 seconds to change to the registration mode. Press the switch ( ) to display the indoor unit address registered. (As same as 2 ) In order to delete the registered indoor unit being displayed on the remote controller, press the ( )

two times continuously. At completion of the deletion, the attribute display section will be shown as “ – – ”.

switch (See figure below.) Note: Completing the deletion of all indoor units registered on the remote controller returns to “HO” display. After completing the registration, continuously press the

+

switch ( + ) at the same time for

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

ERROR CODE OA UNIT ADDRESS NO

˚C

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

Set the address

2 Press the switch for

confirmation ( )

• Registered

• No registration

❇

Same display will appear when the unit of “007” is not existing.

Press the switch for confirmation ( )

twice continuously.

• Deletion completed

In case of group registration with other indoor unit is existing

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

+

“– –” indicates the deletion completed.

(Alternative

display)

(Alternative

display)

ON/OFF

TEMP

FILTER

CHECK TEST

ON OFF

CLOCK

PAR-F27MEA

TIMER SET

ON/OFF

TEMP

FILTER

CHECK TEST

ON OFF

CLOCK

PAR-F27MEA

TIMER SET

ON OFF

CLOCK

FILTER

2

E

F

1

12

2

1

3

AB

E

F

AB

4

1

-54-

4) Deletion of information on address not existing

• Deletion of information on 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 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]

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

+

switch

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

Operate

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

Assign the unit address existing to “OA UNIT ADDRESS No.” with the

(TIMER SET) switch (H), and press

switch to call the address to be deleted. (See the figure below .) As the error display on the remote controller is

transmitted from the indoor unit, “OA UNIT ADDRESS No.” is used as the address of the indoor unit.

usually

Press the switch (

F) twice.(See the figure below.)

After completing the deletion, continuously press the +

switch at the same time for 2

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

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

(Alternative

display)

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

(Alternative

display)

❇

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

(Alternative

display)

❇

When both indoor unit and interlocked unit addresses are existing

Deletion of address not existing

Set the address (

H)

Press the deletion switch

• Deletion completed

12+

Press the switch for confirmation (

E)

ON/OFF

TEMP

FILTER

CHECK TEST

ON OFF

CLOCK

PAR-F27MEA

TIMER SET

FILTER

ON OFF

CLOCK

∞

1

5

4

3

2

3

1

2

(F)twice

(A+B)

(

E)

(

A+B)

❇

-55-

∞

CONTROL

[1] Control of Outdoor Unit [1]- 1 PUHY-P400·500 YEM-A

(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. 2 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 capacity 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 capacity 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

xceeded, 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 e frequency is reduced by 5 Hz.

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

-56-

• 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 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 approached the target values.

3 Frequency control back-up by the bypass valve

Frequency control is back 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 v turned OFF when it is 0.196 MPa or more.

• 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

2

(2.65

MPa) and turned OFF when it is 24 kg/cm

2

(2.35 MPa) or less.

(4) Bypass - capacity control

The solenoid valves have bypass valves (SV1, SV4 and SV6) 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 (SV6) [SV6 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.

No. 1 compressor No. 2 compressor SV6

Stop Stop OFF Operate Stop ON Operate Operate OFF

ON

OFF

ON

OFF

alve is turned ON when the low pressure (63 LS) is 0.098 MPa or less and

0.098 MPa

0.196 MPa

2.35 MPa 2.65 MPa

ed-up by turning on (opening) the bypass valve (SV4) when only the No.1 compressor

-57-

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

Ps

Pd after

30 seconds

Pd

❇

Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

(4-minute)

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

Start

Thermo. OFF

Thermo. ON

Defrost

Stop

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

ON OFF

SV1

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

ON

Ps

Pd

ON when the high pressure (Pd) exceeds the control pressure limit.

OFF

SV4

— —

—

Normally ON

—

3) Capacity control solenoid valve (SV22, SV32). (Model 500 only)

• Operation of solenoid valve

• SV22 and SV32 stand for SV2 and SV3 of the No. 2 compressor.

Solenoid valve

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

Status Full-load

(Operating at 100 % capacity)

Un-load (Capacity control operation)

Pd

130˚C (No. 1 compressor) 115˚C (No. 2 compressor) 2 compressor)

• Td

and

•

Pd or

Ps

115˚C (No. 1 compressor) 100˚C (No.

Td

0.196 MPa

0.098 MPa

2.65 MPa

2.35 MPa and

2.70 MPa

2.35 MPa and after 30 seconds.

1.96 MPa

0.34 MPa

SV22

SV32

COMP

-58-

(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 temper ature; 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.

(7) 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 hav e 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

(6) Sub-cool coil control (Electronic expansion valve (LEV1))

• The sub-cool coil control provides control ev ery 30 seconds to keep the super heat v olume from the temper ature of the inlet/outlet of the sub-cool coil (TH8, TH9) within a stable range (2 to 4 degrees).

• It controls by correcting the amount of opening according to the temperature of the inlet/outlet of the sub-cool coil (TH5, TH7), the high pressure (Pd) and discharge temperature.

• It is closed (0) in heating or when the compressor is stopped.

• It has a fixed opening (480) in defrosting.

• During normal control, the operating range is 46 to 480.

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.

(8) 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.

-59-

(9) Judgement and control of refrigerant amount

• Judge refrigerant amount by detecting refrigerant liquid surface 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

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.

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)

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

• 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 le vel 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 ignore 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 > ineffective.)

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

refrigerant ignore display are extinguished.

TH3

TH4

Balance pressure pipe

TH2

AL=0

AL=1

AL=2

Dividing plate

Outlet pipe

Inlet pipe

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

❇

Temperature A: low pressure saturation temperature

(TH2).

temperatures in accumulator inlet portion, refrigerant liquid level can be judged.

-60-

(11) 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 are required in response to performance needs, the capacity of the outdoor heat exchanger is controlled b y

the fan volume of the outdoor unit b y phase control and controlling the number of fans and by using

valves to vary the number of out door heat exchangers being used.

the solenoid

2) Control

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

regulating

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

(10) Refrigerant recovery control

Refrigerant recovery is conducted to prevent refrigerant from accum ulating in the stopped unit (f an unit), the unit under cooling mode and that with heating thermostat being turned off.

1) Start of refrigerant recovery 1 Refrigerant recovery is started when the two items below are fully satisfied.

• 30 minutes has passed after finishing refrigerant recovery.

• The level detector detects AL = 0 for 3 minutes continuously, or the discharge SH is high.

2) Refrigerant recovery operation

• Refrigerant is recovered by opening LEV of the objective indoor units (indoor units under stop. fan, and

modes, and that with heating thermostat being turned off) for 30 seconds.

cooling

• The regular capacity control of the outdoor unit and the regular LEV control of the indoor unit are not applied

refrigerant recovery operation, but are fixed with the value before the recovery operation. These

conducted one minute after finishing the recovery operation.

• Defrosting operation is prohibited during the recovery operation, and it will be conducted after finishing

operation.

the recovery

Starts

LEV opening before change

LEV opening at refrigerant recovery (Indoor unit LEV opening 500 pulse)

Finish

30 seconds

Note 1:

Note 2: When there is conductivity at SV7, it is open. When there is no conductivity at SV7, it is closed. Note 3: When the unit is stopped, and SV5b and SV8 are open. SV7 is close.

Operating mode Capacity control pattern Heat exchanger capacity No. of fans Phase control Notes

2

3 1

1

50 % 1 10 to 100 %

100 % 2 10 to 100 % 100 % 2 10 to 100

%

100 % 0 0 %

Cooling

Heating

Defrosting

21S4bON, SV7 ON SV5bON, SV8 OFF

1

25 % 1 10 to 100 %

21S4bON, SV7 OFF SV5bON, SV8 ON

21S4bOFF, SV7 ON SV5bOFF, SV8 OFF 21S4bON, SV7 ON SV5bOFF, SV8 OFF 21S4bOFF, SV7 ON SV5bOFF, SV8 OFF

during

controls will be

that

When there is conductivity at SV5b and SV8, it is closed. When there is no conductivity at SV5b and SV8, it is open.

-61-

TH9

Four-way valve

Compressor

Accumulator

CS circuit

TH2

LPS

Heat exchanger

Outdoor heat exchanger

Indoor heat

exchanger

Flow control

valve

(12) Circulating composition sensor (CS circuit) P-YEM-A only

• As shown in the drawing belo w; the CS circuit has the structure to b ypass 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

C). 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 C, high pressure (HPS), and low pressure (LPS).

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

• CS circuit configuration (Outline drawing)

(

-62-

(13) 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

Initial operation mode is finished.

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.

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.

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.

-63-

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 belo w the specified v alue 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 ev en

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

30 minutes

Step 1

3

minutes

10 minutes

Step 2

5 minutes

Step 3

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

End of initial operation mode

Note 1

30 minutes

Step 1

3

minutes

10 minutes

Step 2

3

minutes

10 minutes

Step 2Step 2

5 minutes

Step 3

Note 1

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Note 2

End of initial operation mode

30 minutes

Step 1

3

minutes

10 minutes

Step 2

3

minutes

10 minutes

Step 2

3 times

3

minutes

10 minutes

Step 2

5 minutes

Step 3

Note 3

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Note 2

End of initial operation mode

(Example 1)

(Example 2)

(Example 3)

-64-

(14) Operation Mode

1) Operating modes of the indoor unit The following five modes can be set by the remote control.

1 Cooling mode 2 Heating mode 3 Dry mode 4 Fan mode 5 Stop mode

2) Operating modes of the outdoor unit The following are the 3 modes for the outdoor unit.

1 Cooling mode All indoor units are operated in cooling mode 2 Heating mode All indoor units are operated in heating mode 3 Stop mode All indoor units are in fan or stop mode

Note : If the outdoor unit has been in the cooling mode and the other indoor units (in stop, fan, thermostat off) are

to the heating mode, those indoor units will not be operated and the heating indicator will be flashed

remote controller. The reverse also applies when the outdoor unit is operated in the heating mode

the

cooling indicator will be flashed on the remote controller.

and

Caution

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

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

Codes for which emergency operation is possible.

Emergency Mode Pattern

Codes for Abnormality

Emergency

which

Impossible

Operation is

Action

When a No. 1 Compressor Failure Occurs

When No. 2 Compressor Failure Occurs

Trouble codes other than those at left.

Emergency Operation only with the No. 2 Compressor

❇

After the retry operation, even if there is a diff

detected

erent abnormality

within <Inverter

code

at left, press the Abnormality>

and after resetting, start

button

by emergency operation.

the unit

[Example]

4250 Reset Retry 4240

Reset Emergency

operation

Emergency Operation only with the No. 1 Compressor

Overcurrent protection

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

65 %

(15) Emergency response operating mode

The emergency operation mode is a mode in which the unit is r un in an emergency to respond to the troub le when the compressors (No . 1, No. 2) break down, making it possib le to carr y out a abnor mality 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

Table Emergency Operation Mode Patterns and

Abnormality

Codes for which Emergency Operation is P ossib le or Impossib le

set on

Serial transmission trouble 0403 VDC sensor/circuit trouble 4200 Bus voltage trouble 4220 Radiator panel overheat protection 4230 Overload protection 4240

4250

IPM Alarm output/ Bus voltage trouble/ Over Current Protection

Cooling fan trouble 4260 Thermal sensor trouble (Radiator panel)

5110

IAC sensor/circuit trouble 5301

-65-

[1]-2 PUHY-400·500 YEM-A

(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

is resumed after initial processing is completed. (Initial processing: Data processing in

processing

setting of each LEV opening, requiring approx. 2 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: Model 500 has capacity control switching, Model 400 does not).

• In response to the required performance, the number of compressors operating, the switching of capacity control and the frequency of the variable capacity compressor is controlled so that the evaporation temperature is between 0 and 5˚C in cooling mode and that the high pressure is between

1.76 and 1.96

MPa in heating mode.

• The fluctuation of the frequency of the variable capacity 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 C and in cooling mode)20˚

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

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. (On Model 500, the No. 2 compressor will be started in un-load operation.)

• Model 400: After the No. 1 compressor has reached 98 Hz, the No. 2 compressor stops starts.

• Model 500: After the No. 1 compressor has reached 100 Hz, the No. 2 compressor stops un-load or un-load

full-load.

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. (On Model 500, the No. 2 compressor will be performed in un-load operation.)

Switching from un-load to full-load of No. 2 compressor (Model 500 only) 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.

Switching from full-load to un-load of No. 2 compressor (Model 500 only) 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,

frequency is reduced every 30 seconds.

the

3) Discharge temperature control The discharge temperature of the compressor (Td) is monitored during the operation. If the upper limit is e

xceeded,

frequency is reduced by 5 Hz.

the

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

microcomputer and initial

1

2

3

4

-66-

• The operating temperature is 124˚C.

4) Compressor frequency control 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 the discharge temperature or the high pressure.

Amount of frequency fluctuation The amount of frequency fluctuation is controlled in response to the evaporation temperature (TH2) and the high pressure (Pd) so that it will approached the target values. Frequency control back-up by the bypass valve Frequency control is backed-up by turning on (opening) the bypass valve (SV4) when only the No.1 compressor .

• 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 evaporation temperature (TH2) is – 30˚C or less and turned OFF when it is – 15˚C or more.

• 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

2.45

MPa and

turned OFF when it is 1.96 MPa) or less.

(4) Bypass - capacity control

The solenoid valves have bypass valves (SV1, SV4 and SV6) 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 (SV6) [SV6 is on (open)]

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

No.

2

No. 1 compressor No. 2 compressor SV6

Stop Stop OFF

Operate Stop ON Operate Operate OFF

ON

OFF

1.96 MPa 2.45 MPa

– 30˚C

ON

OFF

– 15˚C

1

2

3

is operated at its lowest frequency.

-67-

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 saturation temperature (TH2) 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

TH2 – 15˚C

Pd

2.26 MPa and

after

30 seconds

Pd

1.96 MPa

Td

115˚C

❇

Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

(4-minute)

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

Start

Thermo. OFF

Thermo. ON

Defrost

Stop

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

ON OFF

SV1

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

ON

TH2 – 30˚C

Pd

2.26 MPa

ON when the high pressure (Pd) exceeds the control pressure limit.

• Td 130˚C and

• Pd

1.96 MPa or TH2 – 10˚C

OFF

SV4

— —

—

Normally ON

—

3) Capacity control solenoid valve (SV22, SV32)

❇

Model 500 only.

• Operation of solenoid valve

• SV22 and SV32 stand for SV2 and SV3 of the No. 2

compressor.

Solenoid valve

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

Status

Full-load (Operating at 100 % capacity)

Un-load (Capacity control operation)

Pd

2.70 MPa

Pd

2.35

MPa

and

after 30 seconds

.

SV22

SV32

COMP

-68-

(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 of the No. 1 compressor and the ambient temper ature; in heating, by the operating capacity of the

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

= 388 pulse.)

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

capacity

(6) Sub-cool coil control (Electronic expansion valve (LEV1))

• The sub-cool coil control provides control every 30 seconds to keep the super heat volume from the temperature

the inlet/outlet of the sub-cool coil (TH8, TH9) within a stable range (2 to 4 degrees).

• It controls by correcting the amount of opening according to the temperature of the inlet/outlet of the sub-cool

(TH5, TH7), the high pressure (Pd) and discharge temperature.

• It is closed (0) in heating or when the compressor is stopped.

• It has a fixed opening (480) in defrosting.

• During normal control, the operating range is 46 to 480.

(7) 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 0˚C or less is detected for a preset time, defrosting begins.

• When 10 minutes has passed since the compressor began operation or if 10 minutes has passed since recovery

from defrosting, setting the forced defrosting switch (Dip SW2-7) to starts forced defrosting.

2) End of defrosting

• Defrosting ends when 15 minutes has passed since the start of defrosting or when the piping temperature (TH5)

becomes 7˚C or more. (Note that if defrost-prohibited time has been set to 90 minutes, the defrost-prohibit time will be 50 minutes following a 15 minute timed recovery.)

• Ending the defrosting is prohibited for 2 minutes after the start of defrosting. (Note that the defrosting operation will

be ended if the piping temperature exceeds 20˚C within 2 minutes of 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

No. 1 compressor.

is So

of

coil

-69-

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. defrosting has ended, control for changing the number of units is performed.

Once

• 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.

(8) 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.

(9) Judgement and control of refrigerant amount

• Judge refrigerant amount by detecting refrigerant liquid surface accumulator.

1) Judgement of accumulator liquid level

• Return refrigerant from accumulator liquid level detecting circuit to compressor inlet pipe, detect piping tempera-

ture, 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 compar ing these temperatures 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 + 5˚C or less, Gas: TH3 and TH4 are TH2 + 5˚C or more), judge liquid level by comparing TH3 and TH4.

2) Control of liquid level detection 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)

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

• During defrosting.

• For 10 minutes after refrigerant recovery.

(Note that liquid level determination is being performed even when liquid level detection is being disregarded.) 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 ignore sw itch (SW2-4), error stop is not obser ved, 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 > ineffective.) When operation mode shows “Stop,” excessive or insufficient refrigerant display and excessive or insufficient refrigerant ignore display are extinguished.

TH3

TH4

Balance pressure pipe

TH2

AL=0

AL=1

AL=2

Dividing plate

Outlet pipe

Inlet pipe

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

❇

Temperature A: low pressure saturation

(TH2).

temperature

1

2

3

-70-

(10) Refrigerant recovery control

Refrigerant recovery is conducted to prevent refrigerant from accum ulating in the stopped unit (f an unit), the unit

cooling mode and that with heating thermostat being turned off.

1) Start of refrigerant recovery Refrigerant recovery is started when the two items below are fully satisfied.

• 30 minutes has passed after finishing refrigerant recovery.

• The level detector detects AL = 0 for 3 minutes continuously, or the discharge SH is high.

2) Refrigerant recovery operation

• Refrigerant is recovered by opening LEV of the objective indoor units (indoor units under stop. fan, and modes, and that with heating thermostat being turned off) for 30 seconds.

• The regular capacity control of the outdoor unit and the regular LEV control of the indoor unit are not applied

refrigerant recovery operation, but are fixed with the value before the recovery operation. These

conducted one minute after finishing the recovery operation.

controls will be

• Defrosting operation is prohibited during the recovery operation, and it will be conducted after finishing the

operation

(11) 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

are required in response to performance needs, the capacity of the outdoor heat exchanger is controlled b y

the fan volume of the outdoor unit b y phase control and controlling the number of fans and by using the

valves.

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 10 seconds after starting.

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

3) Capacity control pattern

Note 1: When there is conductivity at SV5b, it is open. When there is no conductivity at SV5b, it is closed. Note 2: When the unit is stopped, and SV5b are open.

Starts

LEV opening before change

LEV opening at refrigerant recovery (Indoor unit LEV opening 500 pulse)

Finish

30 seconds

Operating mode Capacity control pattern Heat exchanger capacity No. of fans Phase control Notes

50 % 1 10 to 100 %

100 % 2 10 to 100

%

100 % 2 10 to 100 % 100 % 0

0

%

Cooling

Heating

Defrosting

21S4bON SV5bON 21S4bOFF SV5bOFF 21S4bON SV5bOFF 21S4bOFF SV5bOFF

under

cooling

during

recovery

that regulating solenoid

1

2

-71-

(12) 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

Initial operation mode is finished.

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.

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.

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.

-72-

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.

30 minutes

Step 1

3

minutes

10 minutes

Step 2

5 minutes

Step 3

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

End of initial operation mode

Note 1

30 minutes

Step 1

3

minutes

10 minutes

Step 2

3

minutes

10 minutes

Step 2

5 minutes

Step 3

Note 1

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Note 2

End of initial operation mode

30 minutes

Step 1

3

minutes

10 minutes

Step 2

3

minutes

10 minutes

Step 2

3 times

3

minutes

10 minutes

Step 2

5 minutes

Step 3

Note 3

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Note 2

End of initial operation mode

(Example 1)

(Example 2)

(Example 3)

-73-

(13) Operation Mode

1) Operating modes of the indoor unit The following five modes can be set by the remote control.

Cooling mode Heating mode Dry mode Fan mode Stop mode

2) Operating modes of the outdoor unit The following are the 3 modes for the outdoor unit.

Cooling mode All indoor units are operated in cooling mode Heating mode All indoor units are operated in heating mode Stop mode All indoor units are in fan or stop mode

Note: If the outdoor unit has been in the cooling mode and the other indoor units (in stop, fan, thermostat off) are

to the heating mode, those indoor units will not be operated and the heating indicator will be flashed

remote controller. The reverse also applies when the outdoor unit is operated in the heating mode

on the

cooling indicator will be flashed on the remote controller.

(14) 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

compressors (No. 1, No. 2) break down, making it possible to carry out a trouble reset using the remote control.

the

1) Starting the Emergency Operation Mode

Trouble occurs (Display the trouble code root and trouble code on the remote control). Carry out trouble reset with the remote control.

If the trouble indicted in above is of the kind that permits emergency operation (see the table below), initiate

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

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

with the remote control, then try emergency operation starting corresponding to the contents of the trouble.

Table Emergency Operation Mode Patterns and Trouble Codes for which Emergency Operation is Possible or Impossible

Caution

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

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

Codes for which emergency operation is possible.

Emergency Mode Pattern

Trouble Codes for which Emergency Operation is Impossible

Action

When a No. 1 Compressor Failure Occurs

When No. 2 Compressor Failure Occurs

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 trouble code detected within <Inverter Trouble> 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

Overcurrent protection

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

65 %

set

and the

a retr

Serial transmission trouble 0403 VDC sensor/circuit trouble 4200 Bus voltage trouble 4220 Radiator panel overheat protection 4230 Overload protection 4240

4250

IPM Alarm output/ Bus voltage trouble/ Over Current Protection

Cooling fan trouble 4260 Thermal sensor trouble (Radiator panel)

5110

IAC sensor/circuit trouble 5301

1

2

3

1

3

2 3

4

4 5

-74-

[1]- 3 PUHY-P600·650·700·750 YSEM-A

(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

is resumed after initial processing is completed. (Initial processing: Data processing in

setting of each LEV opening, requiring approx. 2 minutes at the maximum.)

microcomputer and initial

(2) Control at staring

• At startup, variable capacity unit operations will start first.

• 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 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

• Compressor is performed by the variable capacity compressor on the variable capacity unit (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 capacity 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 variab second. 20 to 100 Hz (TH6 20˚C in cooling mode, or in heating mode) 30 to 100 Hz (TH6 20˚C in cooling mode)

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

Switching from stop to run 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.

Switching from run 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. (The No. 2 compressor will be performed in un-load operation.)

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.

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) No. 3 compressor operation/stopping.

Switching No. 3 compressor from stopping to operation When the required performance cannot be obtained with only the No. 1 and No. 2 variable capacity unit compressors, the constant capacity unit No. 3 compressor will be star

ted.

❇

The No. 3 compressor is equipped with a capacity control switching function. It starts with un-load operation in the initial start mode and during defrosting, and starts in full-load operation at all other times.

No.3

No.1 No.2

Constant

capacity

unit

Variable capacity

unit

processing

1

2

3

4

1

le capacity compressor is as follows. It is performed at 3 Hz per

-75-

Switching No. 3 compressor from operation to stopping

When the required performance is exceeded with the No. 1 and No. 2 variable capacity unit compressors and

constant capacity unit No. 3 compressor in operation, the No. 3 compressor will be stopped.

3) Pressure control

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

• While the constant capacity unit is in operation, if the high pressure (63HS) value exceeds

the constant capacity unit compressor will be stopped.

2.55 MPa,

4) Discharge temperature control The discharge temperature of the compressor (Variable capacity unit: TH11, TH12, Constant capacity unit: TH11) 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.

• The operating temperature is 124˚C (No.1 compressor) or 115˚C (No. 2, 3 compressor). While the constant capacity unit is in operation, if the constant capacity unit discharge temperature (TH11) exceeds 115˚C, the constant capacity unit compressor will be stopped.

5) Compressor frequency control 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 the discharge temperature or the high pressure. 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 approached the target values. Frequency control back-up by the bypass valve Frequency control is backed-up b 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 (63LS) is

or less and

turned OFF when it is 0.196 MPa or more.

0.098 MPa

• Heating After the compressor has been operated for 3 minutes and only the No. 1 compressor is operated in un-load

alve is turned ON when the high pressure (Pd) exceeds

and turned OFF when it is 2.35 MPa or less.

ON

OFF

0.098 MPa

0.196 MPa

ON

OFF

2.35 MPa 2.65 MPa

the

lowest frequency), the by passypass vlve

(its

2.65 MPa

2

1

2

3

y turning on (opening) the bypass valve (SV4) when only the No. 1

-76-

(4) Bypass - capacity control

The solenoid valves have bypass valves (SV1, SV4 and SV6) that allow bypassing of the high pressure and low pressure sides and solenoid valves (SV22 and SV32) that control the capacity valve inside the compressor. Those operation are as follows.

: Installed : Not Installed

SV1 SV4 SV6 SV22, SV32

Variable Capacity Unit

Constant Capacity Unit

Use

❇

The compressor of constant capacity unit starts in un-load operation in the initial start mode and during defrosting only, and starts in full-load operation at all other times by SV22,23 switching. Normally compressor capacity control is not performed.

1) Bypass Valve (SV6) (SV6 is open when ON, variable capacity unit only)

• The valve is set as follows according to whether the variable capacity unit No. 1 and No. 2 compressors are operating.

No. 1 Compressor No. 2 Compressor SV6

Stopped Stopped OFF Operating Stopped ON Operating Operating OFF

Maintenance of high-pressure/low-pressure, discharge temperature

Controls the compressors’ internal volume control valve

-77-

130˚C (No. 1 compressor) 115˚C (No. 2 compressor)

• Td

SV1

ON OFF

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

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

Ps

0.196 MPa

Pd

2.35 MPa and

after 30 seconds

Pd

1.96 MPa

❇

Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

(4-minute)

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

Start

Thermo. OFF

Thermo. ON

Defrost

Stop

2) Bypass solenoid valves (SV1, SV4) [Both SV1 and SV4 are on (open)] <Variable capacity unit>

Ps

0.098 MPa

Pd

2.65 MPa

ON when the high pressure (Pd) exceeds the control pressure limit.

SV4

ON OFF

—

Normally ON

—

Pd

2.70 MPa

Pd

2.35 MPa

and

after 30 seconds.

and

• Pd

1.96 MPa

or Ps

0.34 MPa

115˚C (No. 1 compressor) 100˚C (No.

2 compressor)

Td

-78-

Item

At compressor is started After thermostat reset or 3

minutes after startup Compressor stopped during

cooling or heating mode After operation has been stopped During defrosting ((

❇

1) in Fig

below)

When low pressure (63LS) has dropped

When the high pressure (Pd) is risen up

When the discharge temperature (Td) is risen up.

When the high pressure (Pd) is fallen up.

❇

Example of SV1 operation

Compressor

Bypass solenoid valve (SV1)

(4-minute)

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

Start

Thermo. OFF

Thermo. ON

Defrost

(

❇

1)

Stop

SV1

ON for 4 minutes

ON for 3 minutes

ON during normal operation

—

SV4

—

3) Capacity control solenoid valve (SV22, SV32) (Only for PUHY-P700/750YSEM-A)

• Operation of solenoid valve

• SV22 and SV32 stand for SV2 and SV3 of the No. 2, No. 3

compressor.

Solenoid valve

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

Status

Full-load (Operating at 100 % capacity)

Un-load (Capacity control operation)

ON OFF

Low pressure (63LS)

0.098 MPa

Pd

2.70 MPa

When the discharge temperature ˚C110 and high pressure (Pd)

1.96 MPa or

low

pressure (63LS)

0.245 MPa.

Low pressure (63LS)

0.147 MPa

Pd

2.35 MPa and

after 30 seconds

When the discharge temperature

105˚C

—

In heating mode, at starting and low volume of indoor unit, if high pressure (Pd)

1.18 MPa and low pressure (Ps)

0.098 MPa

—

When the high pressure (Pd)

1.27 MPaand after 30 min

utes of

operation.

(4-minute)

ON OFF

SV22

SV32

COMP

-79-

(5) Oil return control (Electronic expansion valve (SLEV); Variable Capacity Unit only)

• 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 temper ature; in heating, by the operating capacity of the No. 1 compressor .

• It is opened (64) 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) Sub-cool coil control (Electronic expansion valve (LEV1))

• The sub-cool coil control provides control ev ery 30 seconds to keep the super heat v olume from the temper ature of the inlet/outlet of the sub-cool coil (TH8, TH9) within a stable range (2 to 4 degrees).

• It controls by correcting the amount of opening according to the temperature of the inlet/outlet of the sub-cool coil (TH5, TH7), the high pressure (Pd) and discharge temperature.

• It is closed (0) in heating or when the compressor is stopped.

• It has a fixed opening (480) in defrosting.

• During normal control, the operating range is 46 to 480 (Variab le capacity unit), 46 to 300 (Constant capacity unit).

(7) Defrosting control

Defrosting operation controls vary depending on the state of operations before defrosting begins.

Defrost 1 - Defrost 1 - Defrost 2 Variable capacity unit Operating Operating Operating Constant capacity unit Operating Stopped Stopped Variable capacity unit Defrost Defrost Defrost Constant capacity unit Defrost Defrost ❇1 Stopped ❇2 Indoor unit LEV Full open Full closed

❇

1 When the cumulative operating time of the constant capacity unit compressor

30 minutes.

❇

2 When the cumulative operating time of the constant capacity unit compressor < 30 minutes.

1) Start of defrosting Defrost 1 - ,

• After there has been heating operation for 50 minutes and a piping temperature (TH5) of – 8˚C or less is detected for a preset time in either the variable or constant capacity units , defrosting starts.

Defrost 2

• After there has been heating operation for 50 minutes, and a piping temperature of (TH5) of – 8˚C or less is detected for a preset time in the variable capacity unit, defrosting starts.

Forced Defrosting

• When 10 minutes has passed since the compressor began operation, or if 10 minutes has passed since recovery from defrosting, setting the forced defrosting switch (DIPSW2-7) to ON starts forced defrosting.

2) End of Defrosting Defrost 1 -

,

• Defrosting ends when 15 minutes have passed since the start of defrosting, or when a piping temperature (TH5) of 7˚C or more is detected for 2 minutes or longer in both the variable and constant capacity units.

Defrost 2

• Defrosting ends when 15 minutes have passed since the start of defrosting, or when a piping temperature (TH5) of 8˚C or more is detected for 2 minutes or longer in the variable capacity unit.

❇

Ending the defrosting is prohibited for 2 minutes after the start of defrosting. (Note that the defrosting operation will be stopped if the piping temperature exceeds 20˚C or if the high pressure (Pd) exceeds

(1.96 MPa).)

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.

State of operations before defrosting

Defrosting oper

ation control

1

11

112

2

3

2

-80-

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 three in defrost 1 - or , two in defrost 2.

(8) 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.

(9) Judgement and control of refrigerant amount

• Judge refrigerant amount by detecting refrigerant liquid surface 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.

2) Control of liquid level detection 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)

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

• During defrosting.

• For 10 minutes after refrigerant recovery.

(Note that liquid level determination is being performed even when liquid level detection is being disregarded.) 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 ignore 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 > ineffective.) When operation mode shows “Stop,” excessive or insufficient refrigerant display and excessive or insufficient refrigerant ignore display are extinguished.

TH3

TH4

Balance pressure pipe

TH2

AL=0

AL=1

AL=2

Dividing plate

Outlet pipe

Inlet pipe

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

❇

Temperature A: low pressure saturation temperature.

Variable capacity unit; TH2 Constant capacity unit;Saturation

temperature

of 63LS

1

2

3

2

-81-

(10) Liquid Distribution Control (electronic expansion valve (LEV2) constant capacity unit only)

• Liquid distribution control refers to the process by which liquid refrigerant returning from the constant and variable capacity units during heating is equally distributed, and the opening of the constant capacity unit LEV2 is

so that there is no deficiency of liquid refrigerant in the accumulator of each unit.

adjusted

Distribution occurs during heating operations when both the variable and constant capacity units are in operation. When the constant capacity unit is stopped, the LEV2 opening = 60. The LEV2 opening is set to a standard which varies depending on the current operation frequency. The levels of the superheating level (SH1) of the variable capacity unit temperature A and TH10 (whichever temperature is higher) and the accumulator liquid level (AL1) are compared to the superheating level (SH2) of

ature A and TH10a and the accumulator liquid level (AL2) to correct the

above.

Chart: Corrections to the Standard LEV2 Opening

Constant Capacity Unit

Superheating Level SH2 7 SH2

7

Accumulator Level

AL = 0 or 1 AL = 2 AL = 0 or 1 AL = 2

Variable

SH1 7

AL = 0 or 1 no change opening down

Capacity Unit

AL = 2 no change opening up no change

SH1

7

AL = 0 or 1 opening up opening down no change opening down

AL = 2 no change opening up no change

❇

Even when the constant capacity unit is stopped, the after-mentioned liquid refrigerant correction control operation may control LEV2 operations. After the power source has been turned on, and before the variable capacity unit compressor begins operation, the LEV2 is opened to 200. (After compressor operation begins, LEV2 = 60)

60 200 2000

Standard LEV2 Opening

Range of Corrections to LEV2 Opening

❇

Temperature A: low pressure saturation temperature.

standard opening of the LEV2 in

the constant capacity unit temper

1

2

3

-82-

(11) Liquid Refrigerant Correction Control

The liquid refrigerant correction control adjusts the liquid refrigerant amounts between both accumulators in the unlikely event that the liquid refrigerant amount in both the constant and variable capacity unit accumulators should be insufficient, or if excessive amount of liquid refrigerant is returned to either accumulator. During this operation, Service LED No. 4 on the variable capacity unit will light up.

Direction of Accumulator Liquid Transfer

Variable Capacity Unit Constant Capacity Unit

Indoor Unit

Variable Capacity Unit

Constant Capacity Unit

Variable Capacity Unit

Constant Capacity Unit

Variable Capacity Unit

Constant Capacity Unit

Variable Capacity Unit

Constant Capacity Unit

Variable Capacity Unit

Constant Capacity Unit

Variable Capacity Unit

Start Conditions

•In heating mode

•Run and stop indoor units

are mixed.

•Pd 13k (1.27 MPa), or during an accumulator overflow preliminary error.

•Td 110˚C

•In heating mode

•While the constant capacity

unit is stopped.

•During an accumulator overflow preliminary error in the variable capacity unit (AL1 = 2)

•TdSH 40 deg

❇

1

•In heating mode

•During constant capacity

unit operation

•When AL1 = 2 is detected in the variable capacity unit.

•TdSH 40 deg ❇1

•In cooling mode

•While the constant capacity

unit is stopped.

•During an accumulator overflow preliminary error in the variable capacity unit (AL1 = 2)

•Constant capacity unit AL2 = 0 or 1

•Variable capacity unit TH6 25˚C

•In heating mode

•Constant capacity unit

switches from operation to stopping.

•

Constant capacity unit AL2 = 0

•In heating mode

•During an accumulator

overflow error delay in the constant capacity unit (AL2 = 2)

•Variable capacity unit AL1 = 0 or 1

•During cooling or heating

•During an accumulator

overflow preliminary error in the constant capacity unit (AL2 = 2)

•Variable capacity unit AL1 = 0 or 1

Actuator Action

Com-

pressor

–

OFF

–

OFF

Constant Capacity Unit

Variable capacity

unit

–

Operation frequency level up

–

Operation frequency level down

21S4a, b ON

Indoor

Unit

Operation: normal control

Stop: LEV = 60

–

All indoor unit LEV = 60

–

All indoor unit LEV = 60

Stopping

Conditions

While all indoor units are operating Td 115˚C

•AL1 = 0 or 1

•Continuing

for 20 minutes

•AL1 = 0 or 1

•AL2 = 2

•Continuing

for 10 minutes

• AL1 = 0 or 1

• Continuing

for 15 minutes

•AL1 = 0 or 1

•Continuing

for 3 ~ 6 minutes

•AL2 = 0 or 1

•AL1 = 2

•Continuing

for 10 minutes

•AL1 = 2

•Continuing

for 4 minutes

LED Monitor

No.4

•Verify surplus refrigerant

•LD1 lights up

Liquid refrigerant control LD3 lights up

Liquid refrigerant control LD5 lights up

Liquid refrigerant control LD7 lights up

Liquid refrigerant control LD8 lights up

Liquid refrigerant control LD4 lights up

Liquid refrigerant control LD6 lights up

LEV2

–

2000

–

2000

SV5b

–

ON

(open)

ON

(open)

ON

(open)

ON

(open)

–

ON

(open)

Other

–

Fan

ON

–

LEV1 = 480 SV4 ON 21S4 OFF

❇

1 TdSH (Discharge temperature superheating) = Discharge temperature (TH11 or TH12) - Tc (High pressure satur

ation

temperature)

2

4

6

7

3

5

-83-

(12) Refrigerant recovery control

Refrigerant recovery is conducted to prevent refrigerant from accum ulating in the stopped unit (f an unit), the unit

cooling mode and that with heating thermostat being turned off.

under

1) Start of refrigerant recovery Refrigerant recovery is started when the two items below are fully satisfied.

• 30 minutes has passed after finishing refrigerant recovery.

• The variable capacity unit le vel detector or the constant capacity unit level detector detects AL = 0 for 3

continuously, or the discharge SH is high.

minutes

2) Refrigerant recovery operation

• Refrigerant is recovered by opening LEV of the objective indoor units (indoor units under stop. fan, and modes, and that with heating thermostat being turned off) for 30 seconds.

cooling

• The regular capacity control of the outdoor unit and the regular LEV control of the indoor unit are not applied

refrigerant recovery operation, but are fixed with the value before the recovery operation. These

conducted one minute after finishing the recovery operation.

controls will be

• Defrosting operation is prohibited during the recovery operation, and it will be conducted after finishing the

operation.

recovery

(13) Outdoor unit heat exchanger capacity control

Variable capacity unit

1) Control method

• In order to stabilize the evaporation temperature during cooling and the high-pressure pressure during heating that

required in response to performance needs, the capacity of the outdoor heat exchanger is controlled b y

are

fan volume of the outdoor unit by phase control and controlling the number of fans and by using

regulating the

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 10 seconds after starting.

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

3) Capacity control pattern

Constant capacity unit

1) Control Method

• In response to performance needs, the fan level is controlled by the same phase control used in the

capacity unit.variable

2) Control

• The fan is stopped when the (constant capacity unit) compressor is stopped.

• The fan is operated at full speed for 5 seconds after the (constant capacity unit) compressor is started.

• The fan for the outdoor unit is stopped during defrosting.

• The fan is sometimes operated when the TH10a drops, even when the compressor is stopped.

• The fan is operated for several minutes after the compressor is stopped.

Note 1:

Note 2: When there is conductivity at SV7, it is open. When there is no conductivity at SV7, it is closed. Note 3: When the unit is stopped, and SV5b and SV8 are open. SV7 is close.

When there is conductivity at SV5b and SV8, it is closed. When there is no conductivity at SV5b and SV8, it is open.

Starts

LEV opening before change

LEV opening at refrigerant recovery (Indoor unit LEV opening 500 pulse)

Finish

30 seconds

Operating mode Capacity control pattern Heat exchanger capacity No. of fans Phase control Notes

50 %

25 %

1

10 to 100 %

100 % 2 10 to 100 % 100 % 2 10 to 100 % 100 % 0

0

%

Cooling

Heating

Defrosting

21S4bON,SV7ON SV5bON,SV8OFF

21S4bON,SV7OFF SV5bON,SV8ON

21S4bOFF,SV7ON SV5bOFF,SV8OFF 21S4bON,SV7ON SV5bOFF,SV8OFF 21S4bOFF,SV7ON SV5bOFF,SV8OFF

during

the solenoid valves.

1

2

3

-84-

(14) 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 not be performed even 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.

• When operation volume is low in the indoor unit, the constant capacity unit may not run for as long as 7 hours. In order to finish initial operation mode quickly, increase the operation volume of the indoor unit and run under high-external temperature conditions.

• No.1 compressor: variable capacity unit No.1 compressor

• No.2 compressor: variable capacity unit No

.2 compressor

• No.3 compressor: constant capacity unit compressor

Start of initial operation mode

End initial operation mode.

Step 1

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

•Operation of the No.2 and No.3 compressor is

prohibited to operate.

•Finished when cumulative operating time reaches 30 minutes.

Pause Step

• All 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 and No.3 compressor is prohibited. Finished when the cumulative operating time reaches 10 minutes.

Step 3

Step 4

Step 5

Step 6

•

Compressors No.1 and No.2 are both operated. (forced) Operation of the No.3 compressor is prohibited. Finished when cumulative operating time reaches 5 minutes.

Compressor No.1 is operated alone, or No.1 and No.2 compressors are both operated. (equal to load) Operation of the No.3 compressor is prohibited. Finished when the length of continued operation reaches a set amount of time.

•

If 7 hours has passed since the power was turned on, step 4, 5, and 6 are skipped.

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”.

Compressor No.1 and No.2 are both operated. (forced) Operation of the No.3 compressor is prohibited. Finished when the length of continued operation reaches 5 minutes of time.

Compressor No.1 and No.3 are both operated. (forced) Operation of the No.2 compressor is prohibited to operate. Finished when the length of continued operation reaches 10 minutes of time.

-85-

<Initial Start Control Timingchart> For steps 1 - 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 belo w the specified v alue 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 ev en

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

30 minutes

Step 1

3

minutes

10 minutes

Step 2

5 minutes

Step 3

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

End of initial operation mode

Note 1

30 minutes

Step 1

3

minutes

10 minutes

Step 2

3

minutes

10 minutes

Step 2

5 minutes

Step 3

Note 1

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Note 2

End of initial operation mode

30 minutes

Step 1

3

minutes

10 minutes

Step 2

3

minutes

10 minutes

Step 2

3 times

3

minutes

10 minutes

Step 2

5 minutes

Step 3

Note 3

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Note 2

End of initial operation mode

(Example 1)

(Example 2)

(Example 3)

-86-

For steps 4 - 6

Operation

Frequency Level (Hz)

–

217 (For variable capacity

unit model 500)

183 (For variable capacity

unit model 400)

100

Less than 100

Conditions

Constant capacity unit power on 7 hours.

63LS

4.2 K

63LS

3.8 K

63LS

1.5 K

Other

(A-minute Definitions)

A 0

minute

10

minutes

25

minutes

50

minutes

7 hr

(Example 1)

A-minute

Step 4 Step 5 Step 6

10

minutes

5

minutes

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

ON/OFF of

No.3 compressor

End of initial operation mode

Note 4

(Example 2)

A-minute

Less than

A-minute

Less than

A-minute

Step 4 Step 6

Step 5

10

minutes

5

minutes

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

ON/OFF of

No.3 compressor

End of initial operation mode

Note 1

Note 4

(Example 3)

A-minute

Less than 5 minutes

Step 6

Step 5

Step 4

Step 5

Step 4

Step 4 Step 5

10

minutes

5

minutes

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

ON/OFF of

No.3 compressor

End of initial operation mode

Note 2

Note 4

-87-

Note 1: If Step 4 is interrupted (compressor stopped by thermostat OFF or regular stop), Step 4 will be redone

t.at restar Note 2: If Step 5 is interrupted, Step 5 will be redone at restart after performing Step 4 several times. Note 3: If Step 6 is interrupted, Step 5 and Step 6 will be redone at restart after performing Step 4 several times. Note 4: During Step 6, the No. 3 compressor runs with Un-load operation.

(15) Operation Mode

1) Operating modes of the indoor unit The following five modes can be set by the remote control.

Cooling mode Heating mode Dry mode Fan mode Stop mode

2) Operating modes of the outdoor unit The following are the 3 modes for the outdoor unit.

Cooling mode All indoor units are operated in cooling mode Heating mode All indoor units are operated in heating mode Stop mode All indoor units are in fan or stop mode

Note: If the outdoor unit has been in the cooling mode and the other indoor units (in stop, fan, thermostat off) are

to the heating mode, those indoor units will not be operated and the heating indicator will be flashed

set

remote controller. The reverse also applies when the outdoor unit is operated in the heating mode

cooling indicator will be flashed on the remote controller.

and the

.

(Example 4)

A-minute

Less than

10 minutes

Step 5

Step 6 Step 5

Step 6

Step 4

Step 5 Step 4

Step 6

10

minutes

5

minutes

Less than

10 minutes

5

minutes

5

minutes

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

ON/OFF of

No.3 compressor

End of initial operation mode

Note 3

Step 4

Note 4

on the

1

2

3

4 5

-88-

(16) 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

compressors (No. 1, No. 2) break down, making it possible to carry out a trouble reset using the remote control.

the

1) Starting the Emergency Operation Mode Trouble occurs (Display the trouble code root and trouble code on the remote control). Carry out trouble reset with the remote control.

If the trouble indicted in above is of the kind that permits emergency operation (see the table below), initiate

retry operation.

a

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

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

with the remote control, then try emergency operation starting corresponding to the contents of the trouble.

Table Emergency Operation Mode Patterns and Trouble Codes for which Emergency Operation is Possible or Impossible

Codes for which emergency operation is possible.

Overcurrent protection

Error codes other than those at right.

Emergency Mode Pattern

When a No. 1 Compressor Failure Occurs

When No. 2 Compressor Failure Occurs

Constant capacity unit Error (stop)

Trouble Codes for which Emergency Operation is Impossible

Trouble codes other than those at left.

(a)High pressure/ low-

pressure pressure error 1302

(b)Reverse phase error

4103

(c)Communication error

No communication with variable capacity unit

(d)Constant capacity unit

power-off and LEV2 open

(e)Oil equalization circuit

irregularity 1559

Action

Emergency Operation with the No. 2 and No. 3 Compressor

❇

After the retry operation, even if there is a different trouble code detected within <Inverter Trouble> at left, press the button and after resetting, start the unit by emergency operation.

[Example]

4250 Reset Retry 4240

Reset Emergency

operation

Emergency Operation with the No. 1 and No. 3 Compressor

Emergency response operation with the variable capacity unit only (No. 1 and No. 2 compressor).

Failed Compressor External temp. (TH6) Model 600 ~ 750 Notes

No.1

TH6 20˚C (cooling) or heating

60 ~ 70 % No.2 + No.3 Compressors on

TH6 20˚C (cooling) 45 ~ 55 % No.2 Compressor only

No.2

TH6 20˚C (cooling) or heating

65 ~ 75 % No.1 + No.3 Compressors on

TH6 20˚C (cooling) 45 ~ 55 % No.1 Compressor only

No. 3 Don’t care 80 ~ 90 % No.1 + No.2 Compressors on

Caution

During emergency operation, only marked percentage of indoor units can be operated during emergency operation. In case, more than marked percentage of indoor units are operated, over than the percentage of indoor units would be on the stand-by mode.

1

3

2 3

4

Serial transmission trouble 0403 VDC sensor/circuit trouble 4200 Bus voltage trouble 4220 Radiator panel overheat protection 4230 Overload protection 4240

4250

IPM Alarm output/ Bus voltage trouble/ Over Current Protection

Cooling fan trouble 4260 Thermal sensor trouble (Radiator panel)

5110

IAC sensor/circuit trouble 5301

-89-

2) Terminating Emergency Response Operation Mode (Termination Conditions) When one of the following conditions is met, emergency operation mode is terminated.

Cumulative compressor operation time in the cooling mode exceeds 4 hours. Cumulative compressor operation time in the heating mode exceeds 2 hours. Emergency operation mode trouble detected.

(Control During and After Ter

mination)

• During and after termination, the compressor will be stopped and a repeat error code will be flashed on the remote controller.

• If there is a repeat trouble reset during termination, retry operations will start by repeating steps to in 1).

1 2 3

14

-90-

[1]-4 PUHY-600·650·700·750 YSEM(K,C)-A

(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. 2 minutes at the maximum.)

(2) Control at staring

• At startup, variable capacity unit operations will start first.

• 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 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

• Compressor is performed by the variable capacity compressor on the variable capacity unit (No. 1: inverter motor) and constant capacity compressor (No. 2: Model 500 has capacity control switching, Model 400 does not).

• In response to the required performance, the number of compressors operating, the switching of capacity control and the frequency of the variable capacity compressor is controlled so that the evaporation temperature is between 0 and 5˚C in cooling mode and that the high pressure is between

1.76 and 1.96

MPa in

• The fluctuation of the frequency of the variable capacity compressor is as follows. It is performed at 3 Hz per second. 20 to 100 Hz (TH6 20˚C in cooling mode, or in heating mode) 30 to 100 Hz (TH6 20˚C in cooling mode)

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

Switching from stop to run of No. 2 compressor. When the required performance cannot be obtained by only No. 1 compressor, the No. 2 compressor will be started. (On Model 500, the No. 2 compressor will be started in un-load operation.)

• Model 400: After the No. 1 compressor has reached 98 Hz, the No. 2 compressor stops starts.

• Model 500: After the No. 1 compressor has reached 100 Hz, the No. 2 compressor stops un-load or un-load

full-load.

Switching from run 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. (On Model 500, the No. 2 compressor will be performed in un-load operation.)

Switching from un-load to full-load of No. 2 compressor (Model 500 only) 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.

Switching from full-load to un-load of No. 2 compressor (Model 500 only) 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) No. 3 compressor operation/stopping.

Switching No. 3 compressor from stopping to operation When the required performance cannot be obtained with only the No. 1 and No. 2 variable capacity unit compressors, the constant capacity unit No. 3 compressor will be star

ted.

No.3

No.1 No.2

Constant

capacity

unit

Variable capacity

unit

1

2

3

4

1

heating mode.

-91-

2 Switching No. 3 compressor from operation to stopping

When the required performance is exceeded with the No. 1 and No. 2 variable capacity unit compressors and the constant capacity unit No. 3 compressor in operation, the No. 3 compressor will be stopped.

3) 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.

•

4) Discharge temperature control 1 The discharge temperature of the compressor (Variable capacity unit: TH11, TH12, Constant capacity unit:

TH11) 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.

• The operating temperature is 124˚C.

2 While the constant capacity unit is in operation, if the constant capacity unit discharge temperature (TH11)

exceeds 130˚C, the constant capacity unit compressor will be stopped.

5) 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 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 (TH2) and the high pressure (Pd) so that it will be approached the target values.

3 Frequency control back-up by the bypass valve

Frequency control is backed-up by turning on (opening) the bypass valve (SV4) 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 evaporation temperature (TH2) is – 30˚C or less and turned OFF when it is – 15˚C or more.

• 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 2.45Mpa and

ON

OFF

– 30˚C

ON

OFF

– 15˚C

1.96 MPa 2.45 MPa

While the constant capacity unit is in operation, if the high pressure (63HS) value exceeds 2.45 MPa, the constant capacity unit compressor will be stopped.

turned OFF when it is 1.96 MPa or less.

-92-

(4) Bypass - capacity control

The solenoid valves have bypass valves (SV1, SV4 and SV6) that allow bypassing of the high pressure and low pressure sides and solenoid valves (SV22 and SV32) that control the capacity valve inside the compressor. Those operation are as follows.

: Installed : Not Installed

SV1 SV4 SV6 SV22, SV32

Variable Capacity Unit

Constant Capacity Unit

Use

1) Bypass Valve (SV6) (SV6 is open when ON, variable capacity unit only)

• The valve is set as follows according to whether the variable capacity unit No. 1 and No. 2 compressors are operating.

No. 1 Compressor No. 2 Compressor SV6

Stopped Stopped OFF Operating Stopped ON Operating Operating OFF

Maintenance of high-pressure/low-pressure, discharge temperature

Controls the compressors’ internal volume control valve.

-93-

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 saturation temperature (TH2) 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

TH2 – 15˚C

Pd

2.26 MPa

and after 30 seconds

Pd

1.96 MPa

Td

115˚C

❇

Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

(4-minute)

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

Start

Thermo. OFF

Thermo. ON

Defrost

Stop

2) Bypass solenoid valves (SV1, SV4) [Both SV1 and SV4 are on (open)] <Variable capacity unit>

SV1

ON OFF

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

TH2 – 30˚C

Pd

2.26 MPa

ON when the high pressure (Pd) exceeds the control pressure limit.

• Td 130˚C and

• Pd

1.96 MPa

or TH2 – 10˚

C

SV4

ON OFF

—

Normally ON

—

Pd

2.70 MPa

Pd

2.35 MPa and after 30 seconds

-94-

Item

At compressor is started After thermostat reset or 3

minutes after startup Compressor stopped during

cooling or heating mode After operation has been stopped During defrosting ((

❇

1) in Fig

below)

When low pressure (63LS) has dropped

When the high pressure (Pd) is risen up

When the discharge temperature (Td) is risen up.

When the high pressure (Pd) is fallen up.

❇

Example of SV1 operation

Compressor

Bypass solenoid valve (SV1)

(4-minute)

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

Start

Thermo. OFF

Thermo. ON

Defrost

(

❇

1)

Stop

SV1

ON for 4 minutes

ON for 3 minutes

ON during normal operation

—

SV4

—

3) Capacity control solenoid valve (SV22, SV32)

❇

Model 500 only.

• Operation of solenoid valve

• SV22 and SV32 stand for SV2 and SV3 of the No. 2

compressor.

Solenoid valve

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

Status

Full-load (Operating at 100 % capacity)

Un-load (Capacity control operation)

ON OFF

Low pressure (63LS)

0.098 MPa

Pd

2.55 MPa

When the discharge temperature C130˚ and high pressure (Pd)

1.96 MPa or low pressure (63LS)

0.245 MPa.

Low pressure (63LS)

0.147 MPa

Pd

2.25 MPa and after 30 seconds

When the discharge temperature

115˚C

—

In heating mode, at starting and low volume of indoor unit, if high pressure (Pd)

1.18 MPa and low pressure saturation temperature (ET) – 20˚C

—

When the high pressure (Pd)

1.27 MPa and after 30 min

utes of

operation.

(4-minute)

ON OFF

SV22

SV32

COMP

-95-

(5) Oil return control (Electronic expansion valve (SLEV); Variable Capacity Unit only)

• 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 temper ature; in heating, by the operating capacity of the No. 1 compressor .

• It is opened (64) 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) Sub-cool coil control (Electronic expansion valve (LEV1))

• The sub-cool coil control provides control ev ery 30 seconds to keep the super heat v olume from the temper ature of the inlet/outlet of the sub-cool coil (TH8, TH9) within a stable range (2 to 4 degrees).

• It controls by correcting the amount of opening according to the temperature of the inlet/outlet of the sub-cool coil (TH5, TH7), the high pressure (Pd) and discharge temperature.

• It is closed (0) in heating or when the compressor is stopped.

• It has a fixed opening (480) in defrosting.

• During normal control, the operating range is 46 to 480 (Variab le capacity unit), 46 to 300 (Constant capacity unit).

(7) Defrosting control

Defrosting operation controls vary depending on the state of operations before defrosting begins.

Defrost 1 - Defrost 1 - Defrost 2 Variable capacity unit Operating Operating Operating Constant capacity unit Operating Stopped Stopped Variable capacity unit Defrost Defrost Defrost Constant capacity unit Defrost Defrost ❇1 Stopped ❇2 Indoor unit LEV Full open Full closed

❇

1 When the cumulative operating time of the constant capacity unit compressor

30 minutes.

❇

2 When the cumulative operating time of the constant capacity unit compressor < 30 minutes.

1) Start of defrosting Defrost 1 - ,

• After there has been heating operation for 50 minutes and a piping temperature (TH5) of 0˚C or less is detected for a preset time in either the variable or constant capacity units, defrosting starts.

Defrost 2

• After there has been heating operation for 50 minutes, and a piping temperature of (TH5) of 0˚C or less is detected for a preset time in the variable capacity unit, defrosting starts.

Forced Defrosting

• When 10 minutes has passed since the compressor began operation, or if 10 minutes has passed since recovery from defrosting, setting the forced defrosting switch (DIPSW2-7) to ON starts forced defrosting.

2) End of Defrosting Defrost 1 - ,

• Defrosting ends when 15 minutes has passed since the start of defrosting or when the piping temperature (TH5) of both the variable and constant capacity units becomes 7˚C or more.

Defrost 2

• Defrosting ends when 15 minutes has passed since the start of defrosting or when the piping temperature (TH5) of the variable capacity unit becomes 8˚C or more.

❇

Ending the defrosting is prohibited for 2 minutes after the start of defrosting. (Note that the defrosting operation will be stopped if the piping temperature exceeds 20˚C or if the high pressure (Pd) exceeds

1.96 MPa.)

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.

State of operations before defrosting

Defrosting oper

ation control

12

112

2

3

112

2

-96-

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 three in defrost 1 - 1 or 2 , two in defrost 2.

(8) 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, 1minute after starting compressor.

(9) Judgement and control of refrigerant amount

• Judge refrigerant amount by detecting refrigerant liquid surface 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 temperature 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 + 5˚C or less, Gas: TH3 and TH4 are TH2 + 5˚C or more), judge liquid level by comparing TH3 and TH4.

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)

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

• 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 le vel 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 ignore 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 > ineffective.)

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

refrigerant ignore display are extinguished.

TH3

TH4

Balance pressure pipe

TH2

AL=0

AL=1

AL=2

Dividing plate

Outlet pipe

Inlet pipe

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

❇

Temperature A: low pressure saturation temperature.

Variable capacity unit; TH2 Constant capacity unit;Saturation

temperature

of 63LS

-97-

(10) Liquid Distribution Control (electronic expansion valve (LEV2) constant capacity unit only)

• Liquid distribution control refers to the process by which liquid refrigerant returning from the constant and variable capacity units during heating is equally distributed, and the opening of the constant capacity unit LEV2 is

so that there is no deficiency of liquid refrigerant in the accumulator of each unit.

adjusted

1 Distribution occurs during heating operations when both the variable and constant capacity units are in operation.

When the constant capacity unit is stopped, the LEV2 opening = 60. 2 The LEV2 opening is set to a standard which varies depending on the current operation frequency. 3 The levels of the superheating level (SH1) of the variable capacity unit TH2 and TH10 (whichever temperature is

higher) and the accumulator liquid level (AL1) are compared to the superheating level (SH2) of the constant

capacity unit TH9 and TH10a and the accumulator liquid level (AL2) to correct the standard opening of the LEV2

in 2 above.

Chart: Corrections to the Standard LEV2 Opening

Constant Capacity Unit

Superheating Level SH2 3 SH2 3

Accumulator Level

AL = 0 or 1 AL = 2 AL = 0 or 1 AL = 2

Variable

SH1 3

AL = 0 or 1 no change opening down

Capacity Unit

AL = 2 no change opening up no change

SH1 3

AL = 0 or 1 opening up opening down no change opening down

AL = 2 no change opening up no change

❇

Even when the constant capacity unit is stopped, the after-mentioned liquid refrigerant correction control operation may control LEV2 operations. After the power source has been turned on, and before the variable capacity unit compressor begins operation, the LEV2 is opened to 200. (After compressor operation begins, LEV2 = 60)

60 200 2000

Standard LEV2 Opening

Range of Corrections to LEV2 Opening

Mitsubishi MEE03K194 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual