Mitsubishi MEE99K045 Service Manual

AIR CONDITIONERS CITY MULTI Series Y, Super Y

Models PUHY-400YMF-B, 500YMF-B

PUHY-P400YMF-B, P500YMF-B

PUHY-600YSMF-B, 650YSMF-B, 700YSMF-B, 750YSMF-B PUHY-P600YSMF-B, P650YSMF-B, P700YSMF-B, P750YSMF-B

Service Handbook

Contents

1 PRECAUTIONS FOR DEVICES

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

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

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

[3] Necessary Apparatus and Materials and Notes on

Their Handling ............................................................... 4

[4] Brazing ........................................................................... 5

[5] Airtightness Test............................................................. 6

[6] Vacuuming ..................................................................... 6

[7] Charging of Refrigerant ................................................. 7

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

2 COMPONENT OF EQUIPMENT ............................................. 8

[1] Appearance of Components .......................................... 8

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

[3] Equipment Composition ............................................... 22

[4] Electrical Wiring Diagram ............................................. 24

[5] Standard Operation Data ............................................. 27

[6] Function of Dip SW and Rotary SW ............................ 39

3 TEST RUN ............................................................................. 45

[1] Before Test Run ........................................................... 45

[2] Test Run Method .......................................................... 52

4 GROUPING REGISTRATION OF INDOOR UNITS WITH

REMOTE CONTROLLER ...................................................... 53

5 CONTROL.............................................................................. 59

[1] Control of Outdoor Unit ................................................ 59

[2] Operation Flow Chart ................................................. 109

[3] List of Major Component Functions ........................... 114

[4] Resistance of Temperature Sensor ............................ 118

6 REFRIGERANT AMOUNT ADJUSTMENT ......................... 119

[1] Operating Characteristics and Refrigerant Amount ... 119 [2] Adjustment and Judgement of Refrigerant Amount ... 119

[3] Refrigerant Volume Adjustment Mode Operation ....... 122

7 TROUBLESHOOTING ......................................................... 129

[1] Principal Parts ............................................................ 129

[2] LED monitor display and Countermeasures

Depending on the Check Code Displayed ................. 158

[3] LED Monitor Display .................................................. 179

Safety precautions

Before installation and electric work

s Before installing the unit, make sure you read all

the “Safety precautions”.

s The “Safety precautions” provide very important

points regarding safety. Make sure you follow them.

s This equipment may not be applicable to EN61000-

3-2: 1995 and EN61000-3-3: 1995.

s This equipment may have an adverse effect on

equipment on the same electrical supply system.

s Please report to or take consent by the supply au-

thority before connection to the system.

Symbols used in the text

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

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

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts. (This

symbol is displayed on the main unit label.) <Color: Yellow>

: Indicates that the main switch must be turned off before ser-

vicing. (This symbol is displayed on the main unit label.) <Color:

Blue>

: Beware of electric shock (This symbol is displayed on the main

unit label.) <Color: Yellow>

: Beware of hot surface (This symbol is displayed on the main

unit label.) <Color: Yellow>

: Please pay attention to electric shock fully because

ELV

this is not Safety Extra Low-Voltage (SELV) circuit.

And at servicing, please shut down the power supply

for both of Indoor Unit and Outdoor Unit.

Warning: Carefully read the labels affixed to the main unit.

Warning:

• Ask the dealer or an authorized technician to install the air conditioner.

- Improper installation by the user may result in water leakage,

electric shock, or fire.

• Install the air unit at a place that can withstand its weight.

- Inadequate strength may cause the unit to fall down, resulting

in injuries.

• Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.

- Inadequate connection and fastening may generate heat and

cause a fire.

• Prepare for typhoons and other strong winds and earthquakes and install the unit at the specified place.

- Improper installation may cause the unit to topple and result in

injury.

• Always use an air cleaner, humidifier, electric heater, and other accessories specified by Mitsubishi Electric.

- Ask an authorized technician to install the accessories. Improper

installation by the user may result in water leakage, electric shock, or fire.

• Never repair the unit. If the air conditioner must be repaired, consult the dealer.

- If the unit is repaired improperly, water leakage, electric shock,

or fire may result.

• Do not touch the heat exchanger fins.

- Improper handling may result in injury.

• If refrigerant gas leaks during installation work, ventilate the room.

- If the refrigerant gas comes into contact with a flame, poison-

ous gases will be released.

• Install the air conditioner according to this Installation Manual.

- If the unit is installed improperly, water leakage, electric shock,

or fire may result.

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

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

performed improperly, electric shock and fire may result.

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

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

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

• When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (R22/R407C) specified on the unit.

- If a different refrigerant or air is mixed with the original refriger-

ant, the refrigerant cycle may malfunction and the unit may be damaged.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.

- Consult the dealer regarding the appropriate measures to pre-

vent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.

• When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.

- If the air conditioner is installed improperly, water leakage, elec-

tric shock, or fire may result.

• After completing installation 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 de-

vice is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

11

1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

11

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 C1220 (CU-DHP) phosphorus deoxidized copper as specified in the *JIS H3300 “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.

*JIS: Japanese Industrial Standard

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.)

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.

• 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 R407C.

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

Be especially careful when managing the tools.

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

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

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

–1–

[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.

–2–

[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.

–3–

[3] Necessary Apparatus and Materials and Notes on Their Handling

The following tools should be marked as dedicated tools for R407C.

<<Comparison of apparatus and materials used for R407C and for R22>>

Apparatus Used Use R22 R407C

Gauge manifold Evacuating, refrigerant filling Current product Charging hose Operation check Current product Charging cylinder Refrigerant charging Current product Do not use. Gas leakage detector Gas leakage check Current product Shared with R134a Refrigerant collector Refrigerant collection R22 For R407C use only Refrigerant cylinder Refrigerant filling R22

Vacuum pump Vacuum drying Current product

Vacuum pump with a check valve Current product Flare tool Flaring of pipes Current product Bender Bending of pipes Current product Application oil Applied to flared parts Current product

Torque wrench Tightening of flare nuts Current product Pipe cutter Cutting of pipes Current product Welder and nitrogen cylinder Welding of pipes Current product Refrigerant charging meter Refrigerant charging Current product Vacuum gauge Checking the vacuum degree Current product

Identification of dedicated use for R407C : Record refrigerant

name and put brown belt on upper part of cylinder.

Can be used by attaching an adapter with a check valve.

Ester oil or Ether oil or Alkybenzene (Small amount)

Symbols:

Tools for R407C must be handled with more care than those for conventional refrigerants. They must not come into contact with any water or dirt.

To be used for R407C only. Can also be used for conventional refrigerants.

–4–

[4] 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 nitrogen.

–5–

[5] Airtightness Test

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

Halide torch R22 leakage detector

Items to be strictly observed:

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

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

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

Reasons:

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

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

Note:

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

[6] Vacuuming

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

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

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

4. Evacuating time

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

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

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

–6–

[7] Charging of Refrigerant

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

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

Cylin-

der

Cylinder color identification R407C-Gray Charged with liquid refrigerant

R410A-Pink

Valve

der

Val ve

Liquid

Reasons:

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

Note:

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

[8] 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, Super Y (For use with R407C).

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

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

–7–

22

2 COMPONENT OF EQUIPMENT

22

[1] Appearance of Components

1 Variable capacity unit

Ambient temperature Sensor

Oil Separator

Variable Capacity Compressor (No.1 Compressor)

Heat Exchanger

Accumulator

Oil Equalization Pipe Belt Heater Constant Capacity Compressor

(No.2 Compressor)

Rear

Four-way Valve (21S4a)

Four-way Valve (21S4b)

Heat Exchanger

Solenoid Valve (SV5b)

Sub-cool Ciol

Heat Exchanger of CS circuit (PUHY-P-YMF-B only)

–8–

Controller Box

FANCON board

RELAY board

Choke coil (L2)

Thermal overload (51C2)

Magnetic contactor (52C2)

MAIN board INV board

Thyristor module (SCRM)

Transistor module (TRM)

Diode stack (DS)

Magnetic contactor (52F)

–9–

Magnetic contactor (52C1)

Capacitor (C2, C3) (Smoothing capacitor)

Noise Filter Box

(Rear of the controller box)

DC reactor (DCL)

Noise filter box

Noise filter (NF)

–10–

MAIN board

CNTR CNFC1

CNVCC4 Power source for control

CNS1 M-NET transmission

CNS2 M-NET transmission (Centralized control)

CN40 M-NET transmission power supply

CNVCC3 Power source for control

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

CN51

Indication distance 3-4 Compressor

ON/OFF

3-5 Trouble

CNRS3 Serial transmission to INV board

CN20 Power supply

3 L1 1 N

CN3D Cooling/Heating auto changeover

LD1 Service LED

SW4 SW3 SW2 SWU2 SWU1 SW1

–11–

INV board

Output to transistor module

CN3 CN2-1 CN2-2 CN2-3

CNVCC2 Power supply (5 V)

CNVCC1

Power supply

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

CNVDC

CN52C

CNFAN

CNAC2 Power source

1 L2 3 N

CNL2

CN30V

CNTH

CNCT

CNR CNRS2 SW1

–12–

FANCON board

CNV CNW

CNU CNFC2

–13–

RELAY board

CN51C2 CNOUT2 CNRT2

CN52F CN52C2 CNCH

–14–

2 Constant capacity unit

Ambient temperature sensor

Solenoid valve (SV3, PUHN-P-YMF-B only)

Solenoid valve (SV2, PUHN-P-YMF-B only)

Heat exchanger

Accumlator

Four- way valve

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

Gas ball valve

Liquid ball valve

Rear

Constant capacity compressor (No.3 compressor)

Heat exchanger

Controller box

Oil balance pipeBelt heater

Accumulator Sub-cool coil

–15–

Controller Box

CONT board

Terminal block TB1 powersource

FANCON board

Noise Filter (NF)

Terminal block TB3 transmission

Transformer

Magnetic contactor (52C)

Thermal overload relay (51C)

Thyristor module (SCRM)

Fuses (F1,F2)

–16–

CONT board

SWU2

CNTR

SWU1

CNFC1

SW3

SW2

CNS1 M-NET transmission

CN20 Power supply

1 N 3 L1

–17–

BV3

TH6

TH7

TH8

TH5

CJ1

O/S

63HS

TH11

HEX2b

HEX1b

CJ2

CV1

SV4

SV1

CP1 TH4

TH3

CP4

BV2

BV1

TH12

Comp2

Comp1

HEX2a

HEX1a

CV2

SA

MA

CP3a

SV6

SCC

LEV1

63H1

63H2

21S4a

21S4b

SV5b

SV22

SV32

ST5

ST6

CP3b

ST3

ST4

ST9

ST8

TH9a

ST2

ST1

CJ3

ST7

TH9b

TH2

Drier

CP2

CS-circuit

TH10c

63LS

CV3

CP5

TH10a

TH10b

SLEV

[2] Refrigerant Circuit Diagram and Thermal Sensor

1 PUHY-P400·500YMF-B

–18–

2 PUHY-400·500YMF-B

BV1

ST1

* There are SV22, SV32 only for PUHY-500YMF-B

CJ2

CP3b

MASA

ST9

TH2

ST3

TH3

CP2

BV2

BV3

ST2

CP5

CV3

21S4b

21S4a

CJ1

HEX2b

SV4

63HS

ST5

SV6

O/S

CP1

ST6

SV1

TH10a

SV32

SV22

CP3a

TH12

CV2

TH11

CV1

63H2

63H1

No.2

No.1

Comp.

CJ3

SLEV

Comp.

ST4

TH4

CP4

HEX2a

ST8

TH8

TH5

TH7

ST7

TH9

SCC

LEV1

TH10b

SV5b

HEX1a

HEX1b

TH6

–19–

3 PUHY-P600·650·700·750YSMF-B

Distributer(Gas)

Indoor unit

Oil balance

pipe

BV3

TH6

TH7

TH8

TH5

CJ1

O/S

63HS

TH11

HEX2b

HEX1b

CJ2

CV1

SV4

SV1

CP1 TH4

TH3

CP4

BV2

BV1

TH12

Comp2

Comp1

HEX2a

HEX1a

CV2

SA

MA

CP3a

SV6

SCC

LEV1

63H1

63H2

21S4a

21S4b

SV5b

SV22

SV32

ST5

ST6

CP3b

ST3

ST4

ST9

ST8

TH9a

ST2

ST1

CJ3

TH9b

TH2

Drier

CP2

CS-circuit

TH10c

63LS

CV3

CP5

TH10a

TH10b

Distributer(Liquid)

SCC

TH7

TH5

O/S

TH11

CJ2

SV4

SV1

CP1

CP4

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

ST7

TH9

TH8

TH10b

SV3

SV2

SLEV

PUHY-P400,500YMF-B

PUHN-P200,250YMF-B

–20–

21S4b

HEX1b

TH6

TH10b

HEX2b

21S4a

CJ1

63HS

ST5

SV4

SV6

TH10a

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

CP5

CV3

CJ2

SCC

ST1

BV1

Distributer (Gas)

Indoor unit

BV2

ST2

BV3

BV1

ST1

CJ2

63LS

MA

SA

CP3

ST8

ST4

TH4

ST3

TH3

CP4

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

4 PUHY-600·650·700·750YSMF-B

PUHY-400,500YMF-B

–21–

PUHY-200,250YMF-B

[3] Equipment Composition

A. Outdoor Unit

PUHY-(P)400·500YMF-B

PUHY-(P)600·650·700·750

YSMF-B

B. Branch Pipe Kit

▼

Branch joint

4-connection 7-connection 10-connection

Oil balance pipe 1 Distributer (gas)

Oil balance pipe 2 Distributer (liquid)

CMY-Y102S-F CMY-Y102L-F

CMC-30A*

CMY-Y202-F CMY-Y302-F

CMY-Y104-E CMY-Y107-E CMY-Y1010-E

In the case of the PUHY-(P)YSMF-B, the CMC-30A is necessary.

D. Indoor unit

20VMB 25VBM 32VBM 40VBM

-

Cassette ceiling

-

80VLMD 100VLMD 125VLMD

Ceiling

4-way flow2-way flow

concealed

PLFY-PPLFY-P PEFY-P PKFY-P PCFY-P PFFY-P PFFY-P

-

80VKM 100VKM 125VKM

71VMH

80VMH 100VMH 125VMH

Model

1-way flow

Capacity

PMFY-P 20 -20VLMD 20VML 20VAM - 20VLEM 20VLRM 25 -25VLMD 25VML 25VAM - 25VLEM 25VLRM 32 32VKM32VLMD 32VML 32VGM - 32VLEM 32VLRM 40 40VKM40VLMD 40VMH 40VGM 40VGM 40VLEM 40VLRM 50 50VKM50VLMD 50VMH 50VGM - 50VLEM 50VLRM 63 63VKM63VLMD 63VMH - 63VGM 63VLEM 63VLRM

71 80

100 125

140 -- 140VMH - - - 200 -- 200VMH -

250 -- 250VMH - - - -

▼

Ceiling mounted

built-in

PDFY-P

20VM 25VM 32VM 40VM 50VM 63VM

71VM

80VM 100VM 125VM

-

Wall mounted

-

Branch header

Ceiling

suspended

-

100VGM 125VGM

-

Floor standing

Exposed Concealed

--

-

--

E. Option (panel)

Model

Capacity

20 25 32 40

50 63 80

100, 125

Decoration panel

PMP- CMP-

40MB

32LW-F

40LW-F

-

63LW-F

125LW-F

PLP-

-

3GB

6GB

F. Remote controller

PAR-F25MA MJ-103MTRAPAC-FL31MA PAC-SC30GRA PAC-SC32PTA PAC-SE51CRA

CHECK

TEST RUN

STAND BY DEFROST

NETWORK REMOTE CONTROLLER PAR-F25MA

CENTRALLY CONTROLLED

CHECK

INDOOR UNIT ADDRESS NO.

TEMP. TIMER SET

˚C

ON OFF

CLOCK

ERROR CODE OA UNIT ADDRESS NO.

˚C

AM

–

ON/OFF

1Hr.

˚C

FILTER

CHECK MODE

TEST RUN

NOT AVAILABLE

ON OFFCLOCK

FILTER

CHECK

TEST RUN

PM

AM PM

NOT AVAILABLE

ON/OFF

MODE

CLOCK

FAN

VANE

STOP

START

MIN.

HR.

COLLECTIVE GROUP

GROUP REMOTE CONTROLLER PAC-SC30GRA

CENTRALLY CONTROLLED

ADDRESS

CHECK

˚C

ON/OFF

˚C

OFF

ON

FILTER CHECK MODE TEST RUN

NOT AVAILABLE

ON/OFFTEMP.

FILTER

CHECK

GROUP

TEST RUN

ON/OFF

CENTRAL CONTROLLER

TEST RUN

ON/OFF

FAN SPEED

MODE

GROUP

123

SELECT

AIR

DIRECTION

BACK SCREEN

6

54

CLOCK/

TEMP.

VENTILATION

PATTERN

INS.

9

87

TIMER

REMOTE

RESET

MODE

PROHIBITION

ENTER

MJ-103MTRA

DEL.

0

SET

SET/MONITOR TODAY

PROGRAM TIMER PAC-SC32PTA

SMTWTFS

CLOCK

SET BACK

036912

12 15 18 21 24

WEEKLY

DAILY

SET BACK ON

SETTING

SET BACK

ON

DAILY TIMER

OFF

–22–

TEMP.

CENTRAL

TEMP.CHECK

PAC-SE51CRA

˚C

ON/OFF

–23–

*3:NF is in the back of the Inverter Controller Box.

(Refer to the <Unit Internal layout>.)

6

4

2

5

3

1

6

4

2

5

3

1

Black

White

Red

Black White Red

CH11

Fan motor

(Heat exchanger)

Fan motor

(Heat exchanger)

Black

White

Red

51C2/Model P400,(P)500: 27A

Model 400 : 17.5A

Refer to the Service handbook about the switch operation.

SW4-6

OFF

ON

as connection with

PUHN-(P)200/250YMF-B

A

BOX BODY

*2

*1

*2

circuit

detection

There are not “*1” on “PUHY-400YMF-B

”.

There are not “*2” on “PUHY-400/500YMF-B

”.

Black

White

Red

TH10a

TH10b

4321

(4P)

CN13

SV5b

SV6

21S4b

SV4

SV32

DEMAND

SNOW

NIGHT

1-2

CN3S

1-3

CN3N

1-2

Mode

132

CN3N

(3P)

circuit

detection

CN05

12345

6

N

L3

L2

L1

N

L3

L2

L1

Yel l o w

Green/

Blue

Black

White

Red

NF

Yel l o w

Green/

Blue

Black

Red

White

L1

TB1A

BOX BODY

N

L3

L2

3

CNMF2

52C2

14

13

A2

A1

A2

A1

52C2

123

4

5

1

2

3

1

2

3

1

2

123

4

12345

96

95

51C2

CH12

TH12

12 12 1234

CN07

(2P)

CN06

(2P)

CN35

(3P)

CN34

(6P)

654321321

1

2

3

CN38

(3P)

X10

43

21

SSR

X04

X05

21S4a

SV22

CH2

CH3

63H1

TH6

TH3TH4

CN05

(4P)

X07

X06

12345

6

(6P)

CN36

X09

X08

12345

6

(6P)

CN37

(2P)

21

63H2

1

234

5

X02

X03

X01

RELAY board

CNRT1

(5P)

CNRT2

(3P)

CNCH

(3P)

CN51C2

CN52C2

(5P)

CN52F

(3P)

TH9a

(2P)

21

(4P)

CNOUT2

(6P)

CNOUT1

CN09CN12

TH9b TH10c

52F

Black

White

Red

Motor (Compressor)

Control circuit board

52F

U

W

MF2

V

U

W

MC2

V

1

3

5

6

4

2

6

5

4

3

2

1

52C2

51C2

COOL

HEAT

Normal

changeover

Auto

Mode

CN3D

OFF

ON

1-3

OFF

ON

OFF

ON

1-2

Earth terminal

Thermistor

Terminal block

(5P)

CNU

(6P)

CNFC2

(5P)

CNV

(5P)

CNW

Noise Filter

NF

Power transistor module

TRM1~3

Ferrite core

FB1

Diode stack

DS

Electronic expansion valve

Crank case heater(Compressor)

CH11,12

Solid state relay

SSR

Magnetic contactor (Inverter main circuit)

Name

Symbol

High pressure switch

21S4a,b

4-way valve

LEV1,SLEV

Solenoid valve

CH2,CH3

Cord heater

High pressure switch63HS,63LS

63H1,2

ZNR4

Current Sensor

52C1

Magnetic contactor

52C2

Magnetic contactor

52F

Overload Relay

51C2

DCCT

DC reactor

(Power factor improvement)

L2

SV1,22,32,4,5b,6

Choke coil(Transmission)

Fan (Radiator panel)

TB1, 1A, 3,7

DCL

MF1

Blue

Red

Orange

Brown Red

White

Yellow

Black

Purple

Black

Brown

Red

Inverter Controller Box

BOX BODY

(INV board)

Power circuit board

L2

Orange

Yellow

Black

R7

Purple

MF1

(2P)

CN30V

(2P)

CNL2

(6P)

CN3

(5P)

CNLV2

(3P)

CNTR

(5P)

CNLV1

(3P)

CN32

(3P)

CNL

(2P)

CN2-1

(3P)

CNH

(2P)

CN01

THHS

(8P)

CN02

(2P)

CN2-2

(3P)

CN03

(3P)

CNFAN

(7P)

CNRS3

(6P)

CNVCC1

(4P)

CNCT

(6P)

CNVCC3

(2P)

CNVCC2

(7P)

CNRS2

X10

X01

X02

52C1

32165

1234567121432

2

6

3

54

1

32

2

11

1

21

2

21

31

243

2

21

1

43

2

21

FG

12

3

BlackRed

Motor (Compressor)

Varistor

V

MC1

W

C20

C23 C24

C21 C22

U

C25

White

12

DCCT

34

C16

C15

C14

B1

E1

E2

B2

C2E1

TRM3

C1

C2E1

B2 E2 E2 E1 B1

B1

E1

E2

B2

C2E1

C1

TRM2

CNTR1

1A F

250VAC

F3

T01

R3

R2

C3

C2

DCL

+

TRM1

+

52C1

R1

R5

C1

ZNR4

+

~

-~

C1

DS

~

TB7

M2

M1

TB3

controller

remote

Indoor and

Connect to

Yellow

Green/

Blue

Black

Red

White

PE

SLEV

L1

63LS

Red White Black

321

63HS

Red White Black

TH5 TH8

TH7

TH2

TH11

321

2A F

250VAC

F1

L2

TB1

LEV1

SV1

(MAIN board)

50/60 Hz

380/400/415 V

3N~

Power source

L3

N

4:Compressor ON/OFF

5:Trouble

N

12V

X01

X02

(2P)

CNTH

(4P)

CNVDC

3

(3P)

CN52C

2

(3P)

CNR

(3P)

CNX10

1

(3P)

CNS2

2

(3P)

CNAC2

(5P)

CN51

(2P)

CNS1

31

(2P)

CNVCC4

2

(2P)

CN2-3

1

2

3

2

(6P)

CNFC1

2

(3P)

CN20

3

(3P)

CN3S

(3P)

CN3D

1

(3P)

CN33

3

2A F

250VAC

F01

65432

1

5322413

625

5

1

43

1

2

213

5

3

4

4325

1

2

3

6217

3

1

2

1122

1

3

8

1

763211

4

2

1

3

4

VK1 VG1

VK2 VG2

WK1 WG1

WK2

TH2~12, THHS

(FANCON board)

Fan control board

WG2

123

54321 12345

6

5

UK2

UK1

UG1

5

4

UG2

V

CN04

Black

12A F

600VAC

321

4

MF3

L3

12A F

600VAC

F1

L2

W

L3

White

L1

F2

L2

Red

L1

U

V

VG2

VK2

VG1

VK1

WG1

W

WK2

WK1

UK2

U

UG1

SCRM

UG2

UK1

WG2

CNMF3

K

G

K

G

K

G

K

G

K

G

K

G

2

5

R6

PE

L3

1

L1

M1

M2

S

L2

6

4

2

5

3

1

FB1

·When checking for the inside control box,Be sure to turn the

power source off,And confirm that the voltage at the both

ends of main capacitor(C2,C3) is being sufficientry low by

opening MAIN board mounting plate after leaving 10minutes

or more.

·Please read the INSTALLATION MANUAL carefully.

[4] Electrical Wiring Diagram

1 PUHY-(P)400·500YMF-B

–24–

FLAG3

FLAG2

FLAG1

FLAG5

FLAG6

FLAG7

FLAG4

FLAG8

LED1

TH7

❇3

PUHY-P400YMF-B

-(P)500YMF-B

PUHY-400YMF-B

SV22

MC2

63H2

TH12

SV5b

21S4b

SV6

SV4

SV1

TH12

63H2

MC2

63HS

63H1

63LS

TH3

TH4

TH5

TH6

TH10b

TH9b

SV32

LEV1

TH2

TH9a

TH8

TH11

MC1

Oil separator

21S4a

ACCUMULATOR

Inverter

Controller

Box

SLEV

*2

*3

*2

NF

TH10a

TH10c

1102

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

51

456327

910

21S4bSV4

SV22/32

109

OFF:0

ON:1

During

compres-

sor run

( at factory shipment)

FLAG7FLAG1

Display at LED lighting (blinking)

52C2 21S4a

FLAG6

Display

SW1 operation

Always

lighting

81234567

FLAG3 FLAG4FLAG2

SV11

FLAG5

Relay output

display

(Lighting)

Check display1

(Blinking)

FLAG8

ON:1

FLAG8 always

lights at

microcomputer

power ON

18

OFF:0

52C1

❇

SV5b SV6 CH2,3 52F

SV5B is closed

when FLAG3 is

turned ON.

Display the address and error code by turns.

❇Only for PUHY-P400,

(P)500YMF-B

Remarks

–25–

2 PUHN-(P)200·250YMF-B

Model 200: 24A

Model 250: 27A

*1

*1

Appliance

PUHN-P200·250YMF-B

PUHN- 200·250YMF-B

L2

L1

L3

PE

5

G

K G

K

G

K G

K

G

K G

K

CNMF

WG2

UK1

UG2

SCRM

UG1

U

UK2

WK1

WK2

W

WG1

VK1

VG1

VK2

VG2

V

U

L1

Red

L2

F2

L1

L3

W

L2

F1

600VAC

8A F

L3

MF

4

1

2

3

600VAC

8A F

Black

CN04

V

Red

UG2

4

White

Black

5

UG1

UK1

UK2

5

6

5432112345

3

2

1

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

2

3

4

5

6

CN09

(2P)

CN06

(2P)

1

3

CN20

(3P)

2

CNFC1

(6P)

2

3

2

1

CNS1

(2P)

1

2

3

12

CN38

(3P)

X01

N

L3

Power source

3N~

380/400/415V

50Hz

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

Green/

Yellow

Invreter

unit

Unit 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

1

2

3

2

1

5

4

3

2

1

6

5

4

S

X02

SV1

51C

CN46

(3P)

CNCH11

(3P)

CH11

52C1

CN52C1

(5P)

X06

X07

52C151C1

13

14

A1

A2

Detection

circuit

Detection

circuit

ZNR01

A

Fan motor

L1L2L3

CH3

CH2

X05

X04

SSR01

12

34

3

2

1

2

3

4

5

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

SORENOID 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

SORENOID VALVE

4-WAY VALVE

CORD HEATER

CRANK CASE HEATER(COMPRESSOR)

FAN MOTOR(HEAT EXCHANGER)

ELECTRIC MOTOR OF COMPRESSOR

OVER CURRENT RELAY

MAGNET CNTACTOR

FUSE(1A)

SOLID STATE RELAY

VARISTOR

THERMISTER

ELECTRONIC EXPANSION VALVE

THERMISTER

NAMESYMBOL

F1,F2

FUSE(8A)

F1

FUSE(6.3A)

SYMBOL NAME

SORENOID VALVE

51C1

“*1” are not existed

ALL exists

Difference

TH10a

TH8

TH5

TH7

63LS

SV1

63H

TH3

TH4

TH10b

TH11

SV5b

Oil

separater

TH6

TH9

SV4

LEV1

LEV2

21S4

MC1

ACCUMULATOR

Inverter

contoroller

box

(FRONT)

There is not diagnostic switch in constant

capacity unit, but variable capacity unit can

diagnose it.

–26–

[5] Standard Operation Data

1 Cooling operation

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Total current

Voltage

Outdoor unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

Outdoor unit

DB/WB

Set

-

m

-

kg

A

V

PUHY-P400YMF-B PUHY-P500YMF-B

27.0/19.5 27.0/19.5

35.0/24.0 35.0/24.0

55

125 125 100 63 32 125 125 125 100 32

55

10 10 10 10 10 10 10 10 10 10

55 55

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

22.4 28.9

28.2/26.8/25.8 35.1/33.4/32.2

380 ~ 415 380 ~ 415

410 410 360 360 340 410 410 410 360 280

SC (LEV1)

LEV opening

Oil return (SLEV)

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

Pressure

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

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

Low pressure saturation

Outdoor unit

Sectional temperature

temperature (TH2)

Liquid level

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

SCC outlet (TH7)

Bypass outlet (TH8)

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Pulse

kg/cm2G

(MPa)

°C

164 179

200 344

21.5/4.4 21.5/4.3

(2.11/0.43) (2.11/0.42)

92/102 97/102

42

45

67

6/12 12/12

1

30

1

60/51 65/50

27

10 11

Indoor unit

Bypass inlet (TH9a)

CS circuit (TH9b)

Circulating configuration (αOC)

LEV inlet

Heat exchanger outlet

23

16

0.23

26

12

–27–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9a)

CS circuit (TH9b)

Circulating configuration (αOC)

Discharge temperature (TH11)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9)

LEV inlet

Heat exchanger outlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Var iab le

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-P600YSMF-B PUHY-P700YSMF-B

PUHY-P400YMF-B PUHY-P500YMF-B

PUHN-P200YMF-B PUHN-P200YMF-B

27/19.5

35/-

5

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

5

30

Hi

28.9 35.9

42.5/40.4/38.9 50.3/47.8/46.1

380 ~ 415

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

164 179

200 344

116

60

21.5/4.6 21.5/4.5

(2.11/0.45) (2.11/0.44)

92/102 97/102

42

65

87

7/13 13/13

21

30

21

60/51 65/50

27

11 10

32

16

0.23

102

30

4

50

27

13

5

26

12

–28–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9a)

CS circuit (TH9b)

Circulating configuration (αOC)

Discharge temperature (TH11)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9)

LEV inlet

Heat exchanger outlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-P650YSMF-B PUHY-P750YSMF-B

PUHY-P400YMF-B PUHY-P500YMF-B

PUHN-P250YMF-B PUHN-P250YMF-B

27/19.5

35/-

5

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

5

30

Hi

31.9 37.9

45.8/43.5/41.9 53.5/50.8/48.9

380 ~ 415

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

164 179

200 344

116

60

21.5/4.6 21.5/4.5

(2.11/0.45) (2.11/0.44)

92/102 97/102

42

65

87

7/13 13/13

21

30

21

60/51 65/50

27

11 10

32

16

0.23

102

30

3

50

27

12

4

26

12

–29–

Items

Ambient temp.

Indoor

Outdoor

Outdoor unit

DB/WB

PUHY-400YMF-B PUHY-500YMF-B

27.0/19.5 27.0/19.5

35.0/24.0 35.0/24.0

Quantity

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Total current

Voltage

Outdoor unit

Indoor unit

SC (LEV1)

LEV opening

Oil return (SLEV)

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

Pressure

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

Discharge (TH11/TH12)

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

55

125 125 100 63 32 125 125 125 100 32

55

10 10 10 10 10 10 10 10 10 10

55 55

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

22.4 28.9

28.2/26.8/25.8 34.2/32.5/31.3

380 ~ 415 380 ~ 415

430 430 380 380 350 430 430 430 380 290

164 179

344

20.0/4.4 20.0/4.3

(1.96/0.43) (1.96/0.42)

90/95 95/100

Outdoor unit

Sectional temperature

Indoor unit

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

°C

42

23

45

4/10 10/10

3

30

3

60/51 65/50

27

89

45

26

10

–30–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9)

Discharge temperature (TH11)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9)

LEV inlet

Heat exchanger outlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-600YSMF-B PUHY-700YSMF-B

PUHY-400YMF-B PUHY-500YMF-B

PUHN-200YMF-B PUHN-200YMF-B

27/19.5

35/-

5

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

5

30

Hi

28.9 35.9

41.4/39.4/37.9 48.3/45.8/44.2

380 ~ 415

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

164 179

344

116

60

20/4.6 20/4.5

(1.96/0.45) (1.96/0.44)

90/95 95/100

42

43

65

5/11 11/11

43

30

43

60/51 65/50

27

98

54

100

30

6

50

27

11

7

26

10

–31–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9)

Discharge temperature (TH11)

Liquid level

Shell bottom (Comp)

SCC outlet (TH7)

Bypass outlet (TH8)

Bypass inlet (TH9)

LEV inlet

Heat exchanger outlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Var iab le

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-650YSMF-B PUHY-750YSMF-B

PUHY-400YMF-B PUHY-500YMF-B

PUHN-250YMF-B PUHN-250YMF-B

27/19.5

35/-

5

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

5

30

Hi

31.9 37.9

44.6/42.4/40.8 51.4/48.8/47.1

380 ~ 415

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

164 179

344

116

60

20/4.6 20/4.5

(1.96/0.45) (1.96/0.44)

90/95 95/100

42

43

65

5/11 11/11

43

30

43

60/51 65/50

27

98

54

100

30

5

50

27

10

6

26

10

–32–

2 Heating operation

Items

Outdoor unit

PUHY-P400YMF-B PUHY-P500YMF-B

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Total current

Voltage

Outdoor unit

Indoor unit

SC (LEV1)

Oil return (SLEV)

LEV opening

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

DB/WB

Set

-

m

-

kg

A

V

Pulse

21.0/- 21.0/-

7.0/6.0 7.0/6.0

55

125 125 100 63 32 125 125 125 100 32

55

10 10 10 10 10 10 10 10 10 10

55 55

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

22.4 28.7

26.5/25.2/24.3 32.8/31.1/30.0

380 ~ 415 380 ~ 415

420 420 330 490 320 420 420 420 330 320

0

122

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

Pressure

Discharge (TH11/TH12)

Heat exchanger inlet (TH5)

Accumulator

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

Low pressure saturation

Outdoor unit

Sectional temperature

Indoor unit

temperature (TH2)

Liquid level

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

CS circuit (TH9b)

Heat exchanger gas line (TH10a/TH10b)

Circulating configuration (αOC)

Heat exchanger inlet

LEV inlet

Inlet

Outlet

Upper (TH4)

Lower (TH3)

kg/cm2G

(MPa)

°C

21.5/3.6 21.5/3.2

(2.11/0.35) (2.11/0.31)

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

–33–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp)

CS circuit (TH9b)

Heat exchanger gas line (TH10a/TH10b)

Circulating configuration (αOC)

Discharge temperature (TH11)

Suction (Comp)

Liquid level

Shell bottom (Comp)

Heat exchanger gas line (TH10a)

Heat exchanger inlet

LEV inlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Var iab le

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-P600YSMF-B PUHY-P700YSMF-B

PUHY-P400YMF-B PUHY-P500YMF-B

PUHN-P200YMF-B PUHN-P200YMF-B

21/-

7/6

5

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

5

30

Hi

28.9 35.9

38.3/36.4/35.0 44.9/42.7/41.2

380 ~ 415

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

0

122 198

0

500

21.5/3.5 21.5/3.5

(2.11/0.34) (2.11/0.34)

88/93

– 3 – 1

– 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

–34–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

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

Shell bottom (Comp)

Heat exchanger gas line (TH10a)

Heat exchanger inlet

LEV inlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-P650YSMF-B PUHY-P750YSMF-B

PUHY-P400YMF-B PUHY-P500YMF-B

PUHN-P250YMF-B PUHN-P250YMF-B

21/-

7/6

5

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

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

– 5/2 – 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

–35–

Items

Outdoor unit

PUHY-400YMF-B PUHY-500YMF-B

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Total current

Voltage

Outdoor unit

Indoor unit

SC (LEV1)

Oil return (SLEV)

LEV opening

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

DB/WB

Set

-

m

-

kg

A

V

Pulse

21.0/- 21.0/-

7.0/6.0 7.0/6.0

55

125 125 100 63 32 125 125 125 100 32

55

10 10 10 10 10 10 10 10 10 10

55 55

Hi Hi Hi Hi Hi Hi Hi Hi Hi Hi

22.4 28.7

26.0/24.7/23.8 32.2/30.6/29.5

380 ~ 415 380 ~ 415

420 420 330 490 320 420 420 420 330 320

00

122

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

Pressure

Discharge (TH11/TH12)

Heat exchanger inlet (TH5)

Accumulator

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

Outdoor unit

Sectional temperature

Indoor unit

Low pressure saturation temperature (TH2)

Liquid level

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

Heat exchanger gas line (TH10a/TH10b)

Heat exchanger inlet

LEV inlet

Inlet

Outlet

Upper (TH4)

Lower (TH3)

kg/cm2G

(MPa)

°C

18.0/3.6 18.0/3.2

(1.77/0.35) (1.77/0.31)

85/90 85/90

79

– 4 – 5

– 3/4 – 3/2

– 4

30

– 4

43/45 40/33

– 4/– 4 – 5/– 5

78

37

–36–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp)

Heat exchanger gas line (TH10a/TH10b)

Discharge temperature (TH11)

Suction (Comp)

Liquid level

Shell bottom (Comp)

Bypass inlet (TH9)

Heat exchanger gas line (TH10a)

Heat exchanger inlet

LEV inlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Variable

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-600YSMF-B PUHY-700YSMF-B

PUHY-400YMF-B PUHY-500YMF-B

PUHN-200YMF-B PUHN-200YMF-B

21/-

7/6

5

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

5

30

Hi

28.9 35.9

37.9/36.0/34.7 44.4/42.1/40.6

380 ~ 415

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

0

198

100

500

18/3.5 18/3.5

(1.76/0.34) (1.76/0.34)

85/90

79

– 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

78

37

–37–

Items

Ambient temp.

Indoor unit

Condition

Piping

Indoor unit fan notch

Refrigerant volume

Current

unit

Voltage

Outdoor

Indoor unit

Variable capacity

Constant

LEV opening

capacity

High pressure/Low pressure

sure

(after O/S) (before Main ACC)

Pres-

Variable capacity

unit

Sectional temperature

Constant capacity unit

Indoor unit

Indoor

Outdoor

Quantity

Quantity in operation

Model

Main pipe

Branch pipe

Total piping length

SC (LEV1)

Oil return (SLEV)

SC (LEV1)

Liquid pipe (LEV2)

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Suction (Comp)

Low pressure saturation temperature (TH2)

Liquid level

Shell bottom (Comp)

Heat exchanger gas line (TH10a/TH10b)

Discharge temperature (TH11)

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

Liquid level

Shell bottom (Comp)

Bypass inlet (TH9)

Heat exchanger gas line (TH10a)

Heat exchanger inlet

LEV inlet

Outdoor unit

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Upper (TH4)

Lower (TH3)

-

Var iab le

capacity unit

Constant

capacity unit

DB/WB

Set

-

m

-

kg

A

V

Pulse

kg/cm2G

(MPa)

°C

PUHY-650YSMF-B PUHY-750YSMF-B

PUHY-400YMF-B PUHY-500YMF-B

PUHN-250YMF-B PUHN-250YMF-B

21/-

7/6

5

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

5

30

Hi

31.9 37.9

41.2/39.1/37.7 47.7/45.3/43.7

380 ~ 415

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

0

198

100

800

18/3.5 18/3.5

(1.76/0.34) (1.76/0.34)

85/90

79

– 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

78

37

–38–

[6] Function of Dip SW and Rotary SW

(1) Outdoor unit PUHY-P600·650·700·750YSMF-B. PUHY-P400·500YMF-B. 1 Variable capacity unit

MAIN board

Switch Function

SWU 1 ~ 2

SW1

SW2

SW3

SW4

Unit Address Setting

1 ~ 8

For self diagnosis/ operation monitoring

9 ~ 10

1

Centralized Control Switch

2

Deletion of connection information.

3

Deletion of error history.

4

• Adjustment of Refrigerant Volume

• Ignore liquid level errors

5 6 7

Forced defrosting

8 9

10

Reset of the time the CS circuit is closed.

1

SW3-2 Function Valid/ Invalid

2

Indoor Unit Test Operation

3

Defrosting start temperature .

4

Defrosting end temperature.

5

Target low-pressure change

6

Pump Down Function

7

Target high-pressure

change 8 9

10

1

SW4-3 Function valid/

Invalid 2

Change service LED

3

Configuration compensa-

tion value 4 5

Inverter control 6

Switch Models 7 8 9

10

Models

-

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

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

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

Ordinary control

When the CS circuit is closed, that time is totaled. SW3-2 Function Invalid

Stop all indoor units.

– 8°C

7°C

Ordinary control

Ordinary control Ordinary control

Model 400

SW4-3 Function invalid

Display variable capacity unit operations.

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

2-phase modulation Y Setting

Before power is turned on.

Refer to LED monitor display on the outdoor board.

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

• Refrigerant volume

adjustment operation.

• Ignore liquid level errors

-

Start forced defrosting.

-

Timer Reset

SW3-2 Function Valid

All indoor units test run ON.

Evaporation temperature / 2°C lower than normal Pump Down Operation High pressure / 1.5 ~ 2.5 K higher than normal

-

SW4-3 Function valid

Display constant capacity unit operations.

3-phase modulation Super Y Setting

-

– 10°C

12°C

-

Model 500

-

Before power is turned on.

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

During normal operation when power is on.

During normal operation when power is on. 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.

During normal operation when power is on. When SW4-1 is ON

When switching on the power. Before power is turned on.

-

Invalid 2 hours after compressor starts.

-

10 minutes or more after compressor starts.

-

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

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

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

–39–

2 Constant Capacity Unit

Switch Function

SWU 1 ~ 2

SW2

SW3

Unit Address Setting 1 2 3 4

Ignore liquid level errors

5 6

Forced defrosting

7

8 9

10

1 2 3

Defrosting start tempera-

ture. 4

Defrosting end tempera-

ture.

Ignore oil-equalization

5

circuit irregularities 6 7 8 9

Models (Refrigerant)

10

Models (Capacity)

Function According to Switch Operation Switch Set Timing

When Off When On When Off When On

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

-

Ordinary control

-

Ordinary control

-

Ordinary control

-

Ignore liquid level errors

-

Start forced defrosting.

-

– 8°C

7°C

Ignore oil-equalization circuit irregularities

-

R22 Model

Model 200

-

– 10°C

12°C

-

R407C Model

Model 250

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.

-

Invalid 2 hours after compressor starts.

-

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

–40–

PUHY-600·650·700·750 YSMF-B. PUHY-400·500YMF-B. 1 Variable capacity unit

MAIN board

Switch Function

SWU 1 ~ 2

SW1

SW2

SW3

SW4

Unit Address Setting For self diagnosis/

1 ~ 8

operation monitoring

9 ~ 10

Centralized Control

1

Switch Deletion of connection

2

information.

Deletion of error history.

3

• Adjustment of Refriger-

4

ant Volume

• Ignore liquid level errors 5 6

Forced defrosting

7

8 9

Preserve suction pressure

10

SW3-2 Function Valid/

1

Invalid Indoor Unit Test Operation

2

Defrosting start tempera-

3

ture . Defrosting end tempera-

4

ture.

Target low-pressure

5

change

6

Target high-pressure

7

change 8 9

10

1

Change service LED

2

3 4

Inverter control

5

Switch Models

6 7 8 9

10

Models

Function According to Switch Operation Switch Set Timing

When Off When On When Off When On

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

Refer to LED monitor display on the outdoor board.

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.

Ordinary control

-

Display variable capacity unit operations.

-

2-phase modulation Y Setting

-

0°C

7°C

-

Model 400

-

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.

-

3-phase modulation Super Y Setting

-

Before power is turned on.

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

During normal operation when power is on.

During normal operation when power is on. 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 normal operation when power is on. When SW4-1 is ON

When switching on the power. Before power is turned on.

-

Invalid 2 hours after compressor starts.

-

10 minutes or more after compressor starts.

-

Note 1: Factory setting is SWU 1 to 2 = 00, SW3 - 10 = set by model. All other switches are set to OFF. Note 2: If the address is set from 01 to 50, it automatically becomes 100. Note 3: The operation 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.

–41–

2 Constant Capacity Unit

Switch Function

SWU 1 ~ 2

SW2

SW3

Unit Address Setting 1 2 3 4

Ignore liquid level errors

5 6

Forced defrosting

7

8 9

10

1 2 3

Defrosting start tempera-

ture. 4

Defrosting end tempera-

ture.

Ignore oil-equalization

5

circuit irregularities 6 7 8 9

Models (Refrigerant)

10

Models (Capacity)

Function According to Switch Operation Switch Set Timing

When Off When On When Off When On

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

-

Ordinary control

-

Ordinary control

-

Ordinary control

-

Ignore liquid level errors

-

Start forced defrosting.

-

0°C

7°C

Ignore oil-equalization circuit irregularities

-

R22 Model

Model 200

-

– 2°C

12°C

-

R407C Model

Model 250

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.

-

Invalid 2 hours after compressor starts.

-

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

–42–

(2) Indoor unit

DIP SW1, 3

Switch SW name

Room temp. sensor position

1

Clogged filter detect.

2

Filter duration

3

OA intake

4

Remote display select.

5

SW1

SW3

Humidifier control

6

Heating thermo. OFF airflow

7

Heating thermo. OFF airflow

8

Power failure automatic

9

return

Power source start/stop

10

Model selection

1

2

Louver

3

Vane

4

Vane swing function

5

Vane horizontal angle

6

Vane angle set for cooling

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

7

8

Heating 4deg up

9

10

Operation by SW

OFF ON OFF ON

Indoor unit inlet

None

100h

Ineffective

Fan output display

At stationary heating

Very low speed

SW1-7 setting

Ineffective

Heat pump

None

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

2nd setting

Horizontal

–

Ineffective

–

Switch set timing

At unit stopping

(at remote

controller OFF)

Remarks

Always ineffective for PKFY-P.VAM

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

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

Ineffective (ON) setting for floor standing

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

table below.)

Switch

SW1

SW3

Model

3

6

7

3

4

6

8

VBM VLMD VKM VML VMH VM VLRM, VLEM VGM VAM VGM

OFF ON OFF ON ON OFF ON OFF

OFF ON OFF

PLFY-P PEFY-P PDFY-P PFFY-P PCFY-P PKFY-P

OFF ON OFF

ON OFF ON

ON OFF ON OFF ON OFF ON

OFF ON OFF

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

and the power source is not required to reset.)

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

Setting of DIP SW2

Model P20 P25 P32 P40 P50 P63

Capacity (model name) code

SW2 setting

45 681013

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Model P71 P80 P100 P125 P140 P200 P250

Capacity (model name) code

SW2 setting

14 16 20 25 28 40 50

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

–43–

Setting of DIP SW4 Setting of DIP SW5

Model Circuit board used

PMFY-P-DBM

PLFY-P-VLMD

PDFY-P20 ~ 80VM

PLFY-P40 ~ 63VKM

PLFY-P80 ~ 125VKM

PCFY-P-VGM

PKFY-P-VGM

PKFY-P-VAM

PFFY-P-VLEM, P-VLRM

PEFY-P20 ~ 32VML

PEFY-P40 ~ 140VMH

PEHY-P200·250VMH

PDFY-P100·125VM

Phase control

Relay selection

1234

ON OFF ON OFF

––––

ON OFF ON OFF

OFF OFF OFF ON

ON OFF OFF ON

OFF ON OFF ON

OFF OFF ON ON

––––

OFF OFF OFF –

ON ON ON –

OFF OFF OFF –

ON OFF OFF –

OFF OFF ON –

SW4

220V 240V

Switch Function Operation by switch Switch set timing

(PLFY-P-VKM) (PCFY-P-VGM) (PDFY-P-VM)

SWA

Ceiling height setting

3

2

1

* The ceiling

height is changed by SWB setting.

3

2

1

Ceiling height 3 3.5 m 2 2.8 m 1 2.3 m

3

2

1

Always after powering

SWA

SWB

SWC

For options

Setting of air outlet opening

Airflow control

(PLFY-P-VLMD)

3

* As this switch is used by interlocking with SWC,

2

refer to the item of SWC for detail.

1

(PLFY-P-VKM)

2-way

3-way

4-way

SWB

SWA

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

(PLFY-P-VKM, PCFY-P-VGM, PKFY-P-VGM)

Option

Standard

* Set to the option to install the high efficiency

filter

(PLFY-P-VLMD)

3

2

1

SWA

Option

Standard

SWC

(PDFY-P-VM)

Always after powering

123

Always after powering

3

2

1

SWA

Option

Standard

SWC

–44–

33

3 TEST RUN

33

[1] Before Test Run

(1) Check points before test run

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

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

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 is being fully opened.

Note) Certainly close the cap.

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

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

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

Please exercise caution.

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

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

remote controller and their capabilities.

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

Remote controller type (*1) Capability of the

connected indoor units

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

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

higher”.

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

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

(2) Caution at inverter check

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

1

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

Number of connected indoor units that

can be connected without a RP.

200 or lower

200 or higher

Remote controller PAR-F 25MA

Prior to Ver. E After Ver. F

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

2

When checking,

1

2

3

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.

–45–

(3) Check points for test run when mounting options

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

Mounting of drain water lifting-up mechanism

Release connector of pump circuit,

1

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

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

No overflow from drain pan.

After that, connect connector of

2

circuit.

Check pump operations and drainage

3

status in cooling (test run) mode.

Mounting of permeable film humidifier

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

Work Content of test run Check point Result

Disassembling and assembling of drain water lifting-up mechanism

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

Lead wire from control box not

1

damaged.

Rubber cap properly inserted to drain

2

water outlet of drain pan?

Insulation pipe of gas and liquid pipes

3

dealt with as shown in the right figure?

Drain water comes out by operations of drain pump.

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

No water leak from connecting portions of each water piping.

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

Insulation pipe

Mounting of float switch

Electric wiring

Drain pan and piping cover mounted

4

without gap?

Drain pan hooked on cut projection of

5

the mechanism?

Float switch installed without contacting with drain pan?

No mistakes in wiring?

1

Connectors connected surely and

2

tightly?

No tension on lead wire when sliding

3

control box?

No gap

Float switch moves smoothly.

1

Float switch is mounted on mount-

2

ing board straightly without deformation.

Float switch does not contact with

3

copper pipe.

Wiring procedure is exactly followed.

Connector portion is tightly hooked.

–46–

–47–

(5) Check points for system structure

In the case of the PUHY-(P) 400·500 YMF-B Check points from installation work to test run.

Classification Portion Check item Trouble

Installation and piping

Power source wiring

Instruction for selecting combination of outdoor unit, and

1

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

2

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

3

Connecting piping size of branch piping correct?

4

Branch pipe properly selected?

5

Refrigerant piping diameter correct?

6

Refrigerant leak generated at connection?

7

Insulation work for piping properly done?

8

Specified amount of refrigerant replenished?

9

Pitch and insulation work for drain piping properly done?

Specified switch capacity and wiring diameter of main

1

power source used?

2

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.

–48–

Classification Portion Check item Trouble

Transmission line

Limitation of transmission line length followed? For

1

example, 200 m or less (total length: 500 m) at the farthest.

Erroneous operation, error stop.

System set

Before starting

1.25 mm2 or more transmission line used?

2

(Remote controller 10 m or less 0.75 mm

3

2-core cable used for transmission line?

Transmission line apart from power source line by 5 cm

4

2

)

or more?

5

One refrigerant system per transmission line?

The short circuit connector is changed form CN41 to

6

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?

7

Address setting properly done? (Remote controller,

1

indoor unit and outdoor unit.)

Setting of address No. done when shutting off power

2

source?

Address numbers not duplicated?

3

Turned on SW3-8 on indoor unit circuit board when

4

mounting room thermistor sensor?

Refrigerant piping ball valve (Liquid pressure pipe, gas

1

pressure pipe) opened? Turn on power source 12 hours before starting opera-

2

tions?

Erroneous operation, error stop.

Error stop in case multiple-core cable is used.

Erroneous operation, error stop.

Not operate.

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.

–49–

In the case of the PUHY-(P) 600·650·700·750 YSMF-B Check points from installation work to test run.

Outdoor unit

Power

source

for

outdoor

unit

MAIN board

1

6

1

6

8

Switch

2

12345

2157

1

Classification Portion Check item Trouble

Installation and piping

Instruction for selecting combination of outdoor unit, and

1

indoor unit followed? (Maximum number of indoor units

Not operate.

which can be connected, connecting model name, and total capacity.)

2

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

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.

Power source wiring

3

Connecting piping size of branch piping correct?

4

Branch pipe properly selected?

5

Refrigerant piping diameter correct?

6

Refrigerant leak generated at connection?

7

Insulation work for piping properly done?

8

Specified amount of refrigerant replenished?

9

Pitch and insulation work for drain piping properly done?

1

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

2

Proper grounding work done on outdoor unit?

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

–50–

Classification Portion Check item Trouble

Transmission line

Limitation of transmission line length followed? For

1

example, 200 m or less (total length: 500 m) at the farthest.

Erroneous operation, error stop.

System set

Before starting

1.25 mm2 or more transmission line used?

2

(Remote controller 10 m or less 0.75 mm

3

2-core cable used for transmission line?

Transmission line apart from power source line by 5 cm

4

2

)

or more?

5

One refrigerant system per transmission line?

The short circuit connector is changed form CN41 to

6

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?

7

Address setting properly done? (Remote controller,

1

indoor unit and outdoor unit.)

Setting of address No. done when shutting off power

2

source?

Address numbers not duplicated?

3

Turned on SW3-8 on indoor unit circuit board when

4

mounting room thermistor sensor?

Refrigerant piping ball valve (Liquid pressure pipe, gas

1

pressure pipe, oil balance pipe) opened? Turn on power source 12 hours before starting opera-

2

tions?

Erroneous operation, error stop.

Error stop in case multiple-core cable is used.

Erroneous operation, error stop.

Not operate.

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.

–51–

[2] Test Run Method

Operation procedure

1

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

2

Press

TEST RUN

Press

3

Press

4

warm or cold air is blowing out

5

Press adjust button → Make sure that air blow is changed

Press

6

Make sure that indoor unit fans operate normally

7

Make sure that interlocking devices such as ventilator operate normally if any

8

9

Press

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

5. When pressing

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

ON/OFF

display section.

controller. However, it is not a malfunction.

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

selection button → Make sure that air is blowing out

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

button to cancel test run → Stop operation

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

6. When pressing remote controller. However, it is not a malfunction.

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

–52–

44

4 GROUPING REGISTRATION OF INDOOR UNITS WITH REMOTE CONTROLLER

44

(1) Switch function

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

–

ON/OFF

CENTRALLY CONTROLLED

CHECK

STAND BY DEFROST

INDOOR UNIT ADDRESS NO.

ON OFF

CLOCK

˚C

ERROR CODE OA UNIT ADDRESS NO.

1Hr.

NOT AVAILABLE

˚C

FILTER

CHECK MODE

TEST RUN

F Delete switch

ON OFFCLOCK

G Registered mode

selector switch

E Confirmation switch

NETWORK REMOTE CONTROLLER PAR-F25MA

Name Name of actual switch Description

Registration/ordinary mode selection switch

Symbol

of switch

A + B

FILTER

TEMP. TIMER SET

C Switch to assign

indoor unit address

+

H Switch to assign inter-

locked unit address

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

continuously for over 2 seconds under stopping state.

Note) The registered mode can not be obtained for a while after

powering.

Pressing the

FILTER

CONTROLLED”.

Switch to assign indoor unit address

C

of TEMP

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

FILTER

A

Registration/

B

ordinary mode selector switch

CHECK

TEST RUN

D Registration switch

FILTER

+ switch

+ switch displays “CENTRALLY

Registration switch

Confirmation switch

Delete switch

Registered mode selector switch

Switch to assign interlocked unit address

D

TEST RUN

E

This switch is used for group/interlocked registration.

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

CLOCK

F

ON OFF

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

G

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.

H

of TIMER SET

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

–53–

(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-(P)400/500YMF-B)

Outdoor unit (PUHN-(P)200/250YMF-B)

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.)

–54–

(3) Group registration of indoor unit

1) Registration method

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

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

[Registration procedure]

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

FILTER

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

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

adjustment) (C). Then press the

TEST RUN

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

set to 001.

3 After completing the registration, press the

FILTER

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

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

Ordinary mode

• Remote controller under stopping • “HO” under displaying

+

CENTRALLY CONTROLLED

STAND BY DEFROST

NETWORK REMOTE CONTROLLER PAR-F25MA

˚C

INDOOR UNIT

ERROR CODE

ADDRESS NO

OA UNIT ADDRESS NO

1

Group setting mode

˚C

INDOOR UNIT

ERROR CODE

ADDRESS NO

OA UNIT ADDRESS NO

1Hr.

CHECK

INDOOR UNIT ADDRESS NO.

ON OFF

CLOCK

˚C

ERROR CODE OA UNIT ADDRESS NO.

ON OFFCLOCK

TEMP. TIMER SET

NOT AVAILABLE

˚C

FILTER

CHECK MODE

TEST RUN

ON/OFF

TEST RUN

–

FILTER

CHECK

1

2 + 3

˚C

INDOOR UNIT

ERROR CODE

ADDRESS NO

OA UNIT ADDRESS NO

• Registration complete

▲

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

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

• Registration error

▼

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

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

2 Assign the

address (C)

System example

Remote controller

1 Change to the

registration mode (A + B)

Indoor units

3 Press the

registration switch (D)

Group

• Confirm the indoor unit address No.

• Confirm the connection of the transmission line.

–55–

2) Method of retrieval/confirmation

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

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

[Operation procedure]

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

FILTER

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

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

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

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

3 After completing the registration, continuously press the

FILTER

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

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

• Registered

+ switch (A

CENTRALLY CONTROLLED

STAND BY DEFROST

NETWORK REMOTE CONTROLLER PAR-F25MA

CHECK

˚C

INDOOR UNIT ADDRESS NO.

TEMP. TIMER SET

ON OFF

CLOCK

ERROR CODE OA UNIT ADDRESS NO.

ON OFFCLOCK

1Hr.

NOT AVAILABLE

˚C

FILTER

CHECK MODE

TEST RUN

ON/OFF

–

FILTER

CHECK

TEST RUN

1

▲

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

• No registration

▼

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

Note: Only one address will be displayed

1 Press the switch for confirmation (E)

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

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

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

[Operation procedure]

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

FILTER

+ switch (A

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

2 Operate

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

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

(H). Then press the

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

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

4 After completing the retrieval/confirmation, continuously press the

FILTER

+ switch (A + B) at the same time

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

–56–

CENTRALLY CONTROLLED

STAND BY DEFROST

NETWORK REMOTE CONTROLLER PAR-F25MA

CHECK

˚C

INDOOR UNIT ADDRESS NO.

TEMP. TIMER SET

ON OFF

CLOCK

ERROR CODE OA UNIT ADDRESS NO.

ON OFFCLOCK

1Hr.

NOT AVAILABLE

˚C

FILTER

CHECK MODE

TEST RUN

ON/OFF

TEST RUN

–

FILTER

CHECK

1 + 2

▲

• Registered

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

(Alternative

display)

˚C

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

(Alternative

display)

2

2 Press the switch for

confirmation (E)

1 Set the address

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

* Same display will appear when

• No registration

the unit of “007” is not existing.

▼

˚C

INDOOR UNIT

ERROR CODE OA UNIT ADDRESS NO

3) Method of deletion

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

[Operation procedure]

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

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

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

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

(See figure below.) Note: Completing the deletion of all indoor units registered on the remote controller returns to “HO” display.

4 After completing the registration, continuously press the

FILTER

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

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

ADDRESS NO

FILTER

CLOCK ON OFF

+

(F) switch two

CENTRALLY CONTROLLED

STAND BY DEFROST

NETWORK REMOTE CONTROLLER PAR-F25MA

CHECK

˚C

INDOOR UNIT ADDRESS NO.

TEMP. TIMER SET

CLOCK

ERROR CODE OA UNIT ADDRESS NO.

ON OFF

ON OFFCLOCK

1Hr.

NOT AVAILABLE

˚C

FILTER

CHECK MODE

TEST RUN

1 Press the switch for confirmation (F)

twice continuously

ON/OFF

TEST RUN

–

FILTER

CHECK

1

In case group registration with other indoor unit is existing

1

In case no group registration with other indoor unit is existing

–57–

• Deletion completed

▲

˚C

INDOOR UNIT ADDRESS NO

“– –” indicates the deletion completed.

• Deletion completed

▼

INDOOR UNIT ADDRESS NO

ERROR CODE OA UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

ON/OFF

–

4) Deletion of information on address not existing

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

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

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

[Operation procedure]

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

FILTER

+ switch (A

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

2 Operate

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

3 Assign the unit address existing to “OA UNIT ADDRESS No.” with the (Room temperature control) switch (C),

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

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

CLOCK

OFF

ON

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

FILTER

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

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

• Deletion completed

When both indoor unit and interlocked unit addresses are existing

3

▲

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

(Alternative

display)

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

(Alternative

display)

INDOOR UNIT ADDRESS NO

CENTRALLY CONTROLLED

CHECK

STAND BY

INDOOR UNIT

DEFROST

ADDRESS NO.

NETWORK REMOTE CONTROLLER PAR-F25MA

2 Press the switch for

confirmation (E)

˚C

ERROR CODE OA UNIT ADDRESS NO

▲

1 + 2

1Hr.

ON OFF

CLOCK

˚C

ERROR CODE OA UNIT ADDRESS NO.

TEMP. TIMER SET

1 Set the address (H)

NOT AVAILABLE

ON OFFCLOCK

3 Press the deletion switch (F) twice

˚C

FILTER

CHECK MODE

TEST RUN

ON/OFF

TEST RUN

–

FILTER

CHECK

3

Deletion of address not existing

˚C

INDOOR UNIT ADDRESS NO

• Deletion completed

˚C

INDOOR UNIT ADDRESS NO

(Alternative

˚C

▼

ERROR CODE OA UNIT ADDRESS NO

display)

ERROR CODE OA UNIT ADDRESS NO

–58–

55

5 CONTROL

55

[1] Control of Outdoor Unit

[1]- 1 PUHY-P400·500 YMF-B

(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 capacitor compressor is controlled so that the evaporation temperature is between – 2 and – 6°C in cooling mode and that the condensation temperature is 49°C in heating mode.

• The fluctuation of the frequency of the variable capacitor compressor is as follows. It is performed at 2 Hz per

second. 20 to 100 Hz (TH6 > 20°C and in cooling mode, or in heating mode) 30 to 100 Hz (TH6 < 20°C and in cooling mode)

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

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

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

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

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

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

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

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

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

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

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

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

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

–59–

• 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 be approached the target values.

3 Frequency control back-up by the bypass valve

Frequency control is backed-up by the turning on (opening) the bypass valve (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 low pressure (63 LS) is 1.0 kg/cm MPa) or less and turned OFF when it is 2.0 kg/cm

ON

2

G (0.196 MPa) or more.

2

G (0.098

OFF

1.0 kg/cm

(0.098 MPa)

2

G

2.0 kg/cm

(0.196 MPa)

2

G

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

ON

OFF

24 kg/cm2G

(2.35 MPa) (2.65 MPa)

2

(2.35 MPa) or less.

27 kg/cm2G

(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.

2

(2.65

No. 1 compressor No. 2 compressor SV6

Stop Stop OFF Operate Stop ON Operate Operate OFF

–60–

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

SV22

SV32

COMP

Item

At compressor is started

Compressor stopped during cooling or heating mode

After operation has been stopped

During defrosting ((*1) in Fig below)

During oil recovery operation

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

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

When the discharge temperature (Td) is risen up

SV1

ON OFF

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

Pd 27.5 kg/cm2G

(2.70 MPa)

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

—

ON

Normally ON

2

Ps < 1.0 kg/cm

G

(0.098 MPa)

Pd 27 kg/cm2G

(2.65 MPa)

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

130°C

• Td

(No. 1 compressor)

>

115°C (No. 2 compressor)

and Pd > 20 kg/cm2G

•

(1.96 MPa) or Ps < 3.5 kg/cm

2

G

(0.34 MPa)

SV4

OFF

—

Ps 2.0 kg/cm2G

(0.196 MPa)

Pd

24 kg/cm2G

(2.35 MPa) and after

30 seconds

20 kg/cm2G

Pd

(1.96 MPa)

115°C (No. 1 compressor)

Td

100°C (No. 2 compressor)

* Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

Start

(4-minute)

Thermo. OFF

Thermo. ON

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

3) Capacity control solenoid valve (SV22, SV32).

• Operation of solenoid valve

Solenoid valve

Status Full-load

(Operating at 100 % capacity)

Un-load (Capacity control operation)

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

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

Defrost

–61–

Stop

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

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

• It is opened (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 every 30 seconds to keep the super heat volume from the temperature 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.

(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 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 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. (Note that if the defrost-prohibited time is set on 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.

–62–

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.

(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.

Balance pressure pipe

Dividing plate

*Temperature A: low pressure saturation temperature

AL=2

(TH2).

AL=1

Inlet pipe

TH2

AL=0

Outlet pipe

TH4

TH3

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

2) Control of liquid level detection

1 Prohibition of liquid level detection

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

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

• 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 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.)

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

refrigerant ignore display are extinguished.

–63–

(10) Refrigerant recovery control

Refrigerant recovery is conducted to prevent refrigerant from accumulating in the stopped unit (fan 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 cooling modes, and that with heating thermostat being turned off) for 30 seconds.

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

LEV opening before change

Starts

30 seconds

Finish

• The regular capacity control of the outdoor unit and the regular LEV control of the indoor unit are not applied during refrigerant recovery operation, but are fixed with the value before the recovery operation. These controls will be conducted one minute after finishing the recovery operation.

• Defrosting operation is prohibited during the recovery operation, and it will be conducted after finishing the recovery 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 that are required in response to performance needs, the capacity of the outdoor heat exchanger is controlled by regulating the fan volume of the outdoor unit by phase control and controlling the number of fans and by using the solenoid valves.

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

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

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

Cooling

Heating

Defrosting

1 50 % 1 10 to 100 %

2 100 % 2 10 to 100 %

1 100 % 2 10 to 100 %

1 100 % 0 0 %

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.

–64–

(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

Step 1

•

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

•

Operation of the No.2 compressor is prohibited.

•

Finished when cumulative operating time reaches 30 minutes.

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

Pause Step

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

Step 2

•

Only the No.1 compressor is operated.

•

Operation of the No.2 compressor is prohibited.

•

Operates continuously for 10 minutes and finishes.

Step 3

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

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

Initial operation mode is finished.

–65–

(Example 1)

(Example 2)

ON/OFF of

No.1 compressor

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

30 minutes

Step 1

3

minutes

10 minutes

3

minutes

3

minutes

10 minutes

Step 2

10 minutes

End of initial operation mode

5 minutes

Note 1

Step 3

End of initial operation mode

5 minutes

Note 1

Note 2

ON/OFF of

No.2 compressor

(Example 3)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Step 1

30 minutes

Step 1

3

minutes

Step 2

10 minutes

Step 2

3

minutes

Step 2Step 2

10 minutes

Step 2

3 times

3

minutes

Step 3

10 minutes

Step 2

End of initial operation mode

5 minutes

Note 3

Note 2

Step 3

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

Step 3.

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

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

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

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

–66–

(13) 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 set

to the heating mode, those indoor units will not be operated and the heating indicator will be flashed on the remote controller. The reverse also applies when the outdoor unit is operated in the heating mode and 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 the compressors (No. 1, No. 2) break down, making it possible to carry out a trouble reset using the remote control.

1) Starting the Emergency Operation Mode

1 Trouble occurs (Display the trouble code root and trouble code on the remote control). 2 Carry out trouble reset with the remote control. 3 If the trouble 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 trouble reset (without entering the emergency operation mode).

4 If the same trouble 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 trouble.

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

Emergency Mode Pattern

When a No. 1 Compressor Failure Occurs

When No. 2 Compressor Failure Occurs

Codes for which emergency operation is possible.

Serial transmission trouble 0403 VDC sensor/circuit trouble 4200 Breaking of overcurrent 4210 Bus voltage trouble 4220 Radiator panel overheat protection 4230 Overcurrent protection 4240 Cooling fan trouble 4260 Thermal sensor trouble (Radiator panel) 5110 IDC sensor/circuit trouble 5301

Overcurrent protection

Trouble Codes for which Emergency Operation is Impossible

Trouble codes other than those at left.

Action

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

Caution

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

400 500

No. 1 Compressor Failure × 48 % × 65 %

No. 2 Compressor Failure × 65 % × 65 %

.

–67–

[1]-2 PUHY-400·500 YMF-B

(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: 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 capacitor compressor is controlled so that the evaporation temperature is between 0 and 5°C in cooling mode and that the high pressure is between 18 and 20 kg/cm MPa) in heating mode.

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

2

G (1.76 and 1.96

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. (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.

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

3 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.

4 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, the frequency is reduced every 30 seconds.

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

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

–68–

• The operating temperature is 124°C.

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 (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 the 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.

ON

OFF

– 30°C

– 15°C

• 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 25 kg/cm MPa) and turned OFF when it is 20 kg/cm

ON

OFF

20 kg/cm2G

(1.96 MPa) (2.45 MPa)

2

(1.96 MPa) or less.

25 kg/cm2G

(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.

2

(2.45

No. 1 compressor No. 2 compressor SV6

Stop Stop OFF Operate Stop ON Operate Operate OFF

–69–

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

SV22

SV32

COMP

Item

At compressor is started

Compressor stopped during cooling 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)

SV1

ON OFF

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

Pd 27.5 kg/cm2G

(2.70 MPa)

24 kg/cm2G

Pd (2.35 MPa) and after 30 seconds.

—

ON

Normally ON

TH2 < – 30°C

Pd

23 kg/cm2G (2.26 MPa)

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

SV4

OFF

—

TH2 – 15°C.

23 kg/cm2G

Pd (2.26 MPa) and after 30 seconds

20 kg/cm2G

Pd

(1.96 MPa)

When the discharge temperature (Td) is risen up

* Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

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

• Operation of solenoid valve

Solenoid valve

Status Full-load

(Operating at 100 % capacity)

Un-load (Capacity control operation)

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

Start

(4-minute)

Thermo.

OFF

ON

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

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

—

Defrost

• Td > 130°C and

• Pd > 20 kg/cm

(1.96 MPa) or TH2 < – 10°C

Stop

115°C

Td

2

G

–70–

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

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

• It is opened (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 every 30 seconds to keep the super heat volume from the temperature 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.

(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.

–71–

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.

(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.

Balance pressure pipe

Dividing plate

Inlet pipe

TH2

TH4

TH3

*Temperature A: low pressure saturation temperature

AL=2

AL=1

AL=0

Outlet pipe

(TH2).

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

2) Control of liquid level detection

1 Prohibition of liquid level detection

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

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

• 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 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.)

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

refrigerant ignore display are extinguished.

–72–

(10) Refrigerant recovery control

Refrigerant recovery is conducted to prevent refrigerant from accumulating in the stopped unit (fan 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 cooling modes, and that with heating thermostat being turned off) for 30 seconds.

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

LEV opening before change

Starts

30 seconds

Finish

• The regular capacity control of the outdoor unit and the regular LEV control of the indoor unit are not applied during refrigerant recovery operation, but are fixed with the value before the recovery operation. These controls will be conducted one minute after finishing the recovery operation.

• Defrosting operation is prohibited during the recovery operation, and it will be conducted after finishing the recovery 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 that are required in response to performance needs, the capacity of the outdoor heat exchanger is controlled by regulating the fan volume of the outdoor unit by phase control and controlling the number of fans and by using the solenoid valves.

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

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

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

Cooling

Heating

Defrosting

1 50 % 1 10 to 100 %

2 100 % 2 10 to 100 %

1 100 % 2 10 to 100 %

1 100 % 0 0 %

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.

–73–

(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

Step 1

•

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

•

Operation of the No.2 compressor is prohibited.

•

Finished when cumulative operating time reaches 30 minutes.

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

Pause Step

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

Step 2

•

Only the No.1 compressor is operated.

•

Operation of the No.2 compressor is prohibited.

•

Operates continuously for 10 minutes and finishes.

Step 3

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

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

Initial operation mode is finished.

–74–

(Example 1)

(Example 2)

ON/OFF of

No.1 compressor

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

30 minutes

Step 1

3

minutes

10 minutes

3

minutes

3

minutes

10 minutes

Step 2

10 minutes

End of initial operation mode

5 minutes

Note 1

Step 3

End of initial operation mode

5 minutes

Note 1

Note 2

ON/OFF of

No.2 compressor

(Example 3)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Step 1

30 minutes

Step 1

3

minutes

Step 2

10 minutes

Step 2

3

minutes

Step 2Step 2

10 minutes

Step 2

3 times

3

minutes

Step 3

10 minutes

Step 2

End of initial operation mode

5 minutes

Note 3

Note 2

Step 3

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

Step 3.

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

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

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

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

–75–

(13) 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 set

to the heating mode, those indoor units will not be operated and the heating indicator will be flashed on the remote controller. The reverse also applies when the outdoor unit is operated in the heating mode and 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 the compressors (No. 1, No. 2) break down, making it possible to carry out a trouble reset using the remote control.

1) Starting the Emergency Operation Mode

1 Trouble occurs (Display the trouble code root and trouble code on the remote control). 2 Carry out trouble reset with the remote control. 3 If the trouble 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 trouble reset (without entering the emergency operation mode).

4 If the same trouble 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 trouble.

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

Emergency Mode Pattern

When a No. 1 Compressor Failure Occurs

When No. 2 Compressor Failure Occurs

Codes for which emergency operation is possible.

Serial transmission trouble 0403 VDC sensor/circuit trouble 4200 Breaking of overcurrent 4210 Bus voltage trouble 4220 Radiator panel overheat protection 4230 Overcurrent protection 4240 Cooling fan trouble 4260 Thermal sensor trouble (Radiator panel) 5110 IDC sensor/circuit trouble 5301

Overcurrent protection

Trouble Codes for which Emergency Operation is Impossible

Trouble codes other than those at left.

Action

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

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.

400 500

No. 1 Compressor Failure × 48 % × 65 %

No. 2 Compressor Failure × 65 % × 65 %

.

–76–

[1]- 3 PUHY-P600·650·700·750 YSMF-B

(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: It has capacity control switching).

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

• The fluctuation of the frequency of the variable capacitor compressor is as follows. It is performed at 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)

No.3

No.1 No.2

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

1 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.

2 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.)

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) No. 3 compressor operation/stopping.

1 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 started.

*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.

Constant

capacity

unit

Variable capacity

unit

–77–

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.

• While the constant capacity unit is in operation, if the high pressure (63HS) value exceeds 26 kg/cm

2

G (2.55 MPa),

the constant capacity unit compressor will be stopped.

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 (No.1 compressor) or 115°C (No. 2, 3 compressor).

2 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

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 be approached the target values.

3 Frequency control back-up by the bypass valve

Frequency control is backed-up by the turning on (opening) the bypass valve (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 low pressure (63LS) is 1.0 kg/cm or less and turned OFF when it is 2.0 kg/cm

2

G (0.196 MPa) or more.

2

G (0.098 MPa)

ON

OFF

1.0 kg/cm

(0.098 MPa)

2

G

2.0 kg/cm

(0.196 MPa)

2

G

• 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/cm2 (2.35 MPa) or less.

ON

OFF

24 kg/cm2G

(2.35 MPa) (2.65 MPa)

27 kg/cm2G

–78–

(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.

–79–

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

Item

At compressor is started

Compressor stopped during cooling or heating mode

After operation has been stopped

During defrosting ((*1) in Fig below)

During oil recovery operation

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

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

When the discharge temperature (Td) is risen up

SV1

ON OFF

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

Pd 27.5 kg/cm2G

(2.70 MPa)

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

—

ON OFF

Normally ON

Ps < 1.0 kg/cm

2

G

(0.098 MPa)

Pd 27 kg/cm2G

(2.65 MPa)

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

130°C (No. 1 compressor)

• Td > 115°C

(No. 2 compressor)

and

• Pd > 20 kg/cm

2

G

(1.96 MPa) or Ps < 3.5 kg/cm

2

G

(0.34 MPa)

SV4

—

Ps 2.0 kg/cm2G

(0.196 MPa)

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

Pd 20 kg/cm2G

(1.96 MPa)

115°C (No. 1 compressor)

Td

100°C (No. 2 compressor)

* Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

Start

(4-minute)

Thermo. OFF

Thermo. ON

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

Defrost

Stop

–80–

SV22

SV32

COMP

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.

SV1

ON OFF

ON for 4 minutes

ON for 3 minutes

ON during normal operation

Low pressure (63LS) < 1.0 kg/cm

2

G

(0.098 MPa)

Pd 27.5 kg/cm2G

(2.70 MPa)

When the discharge temperature > 110°C and high pressure (Pd) > 20 kg/cm

2

G (1.96 MPa) or low pressure (63LS) <

2.5 kg/cm

2

G

(0.245 MPa).

Low pressure (63LS)

1.5 kg/cm2G (0.147 MPa)

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

When the discharge tempera-

105°C

ture

SV4

ON OFF

—

When the high pressure (Pd) is fallen up.

* Example of SV1 operation

Compressor

Bypass solenoid valve (SV1)

Start

(4-minute)

Thermo. OFF

Thermo. ON

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

(4-minute)

3) Capacity control solenoid valve (SV22, SV32)

• Operation of solenoid valve

Solenoid valve

Status

Full-load (Operating at 100 % capacity)

Un-load (Capacity control operation)

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

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

—

Defrost

(*1)

–81–

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

2

G (1.18 MPa)

12 kg/cm and low pressure (Ps) <

2

1.0 kg/cm

G (0.098 MPa)

Stop

When the high

pressure (Pd) 13 kg/cm2G (1.27 MPa) and after 30 minutes of operation.

(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 temperature; 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 every 30 seconds to keep the super heat volume from the temperature 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 (Variable 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 - 1 Defrost 1 - 2 Defrost 2

State of operations before defrosting

Defrosting operation control

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

1 Defrost 1 - 1, 2

• 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.

2 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.

3 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

1 Defrost 1 - 1, 2

• 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.

2 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 20 kg/cm

2

G (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.

–82–

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, 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.

Balance pressure pipe

Dividing plate

*Temperature A: low pressure saturation temperature.

AL=2

Variable capacity unit; TH2 Constant capacity unit; Saturation

temperature of 63LS

AL=1

AL=0

Inlet pipe

TH2

TH4

TH3

• Judgement by the AL is at best only a

Outlet pipe

rough guideline. Please do not add refrigerant based on the AL reading alone.

2) Control of liquid level detection

1 Prohibition of liquid level detection

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

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

• 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 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.)

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

refrigerant ignore display are extinguished.

–83–

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

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 temperature A and TH10 (whichever

temperature is higher) and the accumulator liquid level (AL1) are compared to the superheating level (SH2) of the constant capacity unit temperature A and TH10a and the accumulator liquid level (AL2) to correct the standard opening of the LEV2 in 2 above.

* Temperature A: low pressure saturation temperature.

Chart: Corrections to the Standard LEV2 Opening

Constant Capacity Unit

Variable

Capacity Unit

Superheating Level SH2 > 7 SH2

SH1 > 7

SH1

Accumulator Level

7

AL = 0 or 1 no change opening down

AL = 2 no change opening up no change

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

AL = 2 no change opening up no change

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

7

60 200 2000

Standard LEV2 Opening

Range of Corrections to LEV2 Opening

* 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)

–84–

(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 and excessive amount of liquid refrigerant is returned from either accumulator. During this operation, Service LED No. 4 on the variable capacity unit will light up.

Actuator Action

Direction of Accumulator Liquid Transfer

Start Conditions

Constant Capacity Unit

Com-

pressor

LEV2

SV5b

Other

Variable

capacity

unit

Indoor

Unit

Stopping

Conditions

LED Monitor

No.4

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

• 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

–

OFF

–

2000

–

ON

(open)

ON

(open)

ON

(open)

–

Fan

ON

–

Operation frequency level up

Operation: normal control

Stop: LEV = 60

–

All indoor unit LEV = 60

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

• Verify surplus refrigerant

• LD1 lights up

Liquid refrigerant control 2 LD3 lights up

Liquid refrigerant control 4 LD5 lights up

Liquid refrigerant control 6 LD7 lights up

Variable Capacity Unit

↓

Constant Capacity Unit

↓

Variable Capacity Unit

Constant Capacity Unit

↓

Variable Capacity Unit

• 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

OFF

–

OFF

2000

–

2000

ON

(open)

–

ON

(open)

–

LEV1 = 480 SV4 ON 21S4 OFF

–

Operation frequency level down

21S4a, b ON

–

All indoor unit LEV = 60

• 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

Liquid refrigerant control 7 LD8 lights up

Liquid refrigerant control 3 LD4 lights up

Liquid refrigerant control 5 LD6 lights up

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

temperature)

–85–

(12) Refrigerant recovery control

Refrigerant recovery is conducted to prevent refrigerant from accumulating in the stopped unit (fan 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 variable capacity unit level detector or the constant capacity unit 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 cooling modes, and that with heating thermostat being turned off) for 30 seconds.

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

LEV opening before change

Starts

30 seconds

Finish

• The regular capacity control of the outdoor unit and the regular LEV control of the indoor unit are not applied during refrigerant recovery operation, but are fixed with the value before the recovery operation. These controls will be conducted one minute after finishing the recovery operation.

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

(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 are required in response to performance needs, the capacity of the outdoor heat exchanger is controlled by regulating the fan volume of the outdoor unit by phase control and controlling the number of fans and by using the solenoid valves.

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

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

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

Cooling

Heating

Defrosting

1 50 % 1 10 to 100 %

2 100 % 2 10 to 100 %

1 100 % 2 10 to 100 %

1 100 % 0 0 %

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. Note 3: When the unit is stopped, there is no conductivity at 21S4b, in cooling mode and SV5b is opened.

Constant capacity unit

1) Control Method

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

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.

–86–

(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

Start of initial operation mode

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

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.

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

Pause Step

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

Step 2

•

Only the No.1 compressor is operated.

•

Operation of the No.2 and No.3 compressor are prohibited to operate.

•

Finished when the cumulative operating time reaches 10 minutes.

Step 3

•

Compressors No.1 and No.2 are both operated. (forced)

•

Operation of the No.3 compressor is prohibited to operate.

•

Finished when cumulative operating time reaches 5 minutes.

Step 4

•

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 to operate.

•

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.

–87–

Step 5

•

Compressor No.1 and No.2 are both operated. (forced)

•

Operation of the No.3 compressor is prohibited to operate.

•

Finished when the length of continued operation reaches 5 minutes of time.

Step 6

•

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.

End initial operation mode.

<Initial Start Control Timingchart> For steps 1 - 3

(Example 1)

(Example 2)

ON/OFF of

No.1 compressor

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

30 minutes

Step 1

3

minutes

10 minutes

3

minutes

3

minutes

10 minutes

Step 2

10 minutes

End of initial operation mode

5 minutes

Note 1

Step 3

End of initial operation mode

5 minutes

Note 1

Note 2

ON/OFF of

No.2 compressor

(Example 3)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Step 1

30 minutes

Step 1

3

minutes

Step 2

10 minutes

Step 2

3

minutes

Step 2Step 2

10 minutes

Step 2

3 times

3

minutes

Step 3

10 minutes

Step 2

End of initial operation mode

5 minutes

Note 3

Note 2

Step 3

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

Step 3.

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

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

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

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

–88–

For steps 4 - 6

(Example 1)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

ON/OFF of

No.3 compressor

5

minutes

A-minute

Step 4 Step 5 Step 6

10

minutes

End of initial operation mode

(A-minute Definitions)

Conditions

Constant capacity unit power on 7 hours.

63LS 4.2 K

63LS 3.8 K

Note 4

63LS 1.5 K

Other

Operation

Frequency Level (Hz)

–

217 (For variable capacity

unit model 500)

183 (For variable capacity

unit model 400)

100

Less than 100

A

0

minute

10

minutes

25

minutes

50

minutes

7 hr

(Example 2)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

ON/OFF of

No.3 compressor

(Example 3)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

Less than

A-minute

5

Less than

A-minute

Step 4 Step 6

Less than 5 minutes

A-minute

Note 1

Less than 5 minutes

minutes

Step 5

5

minutes

10

minutes

End of initial operation mode

10

Note 4

End of initial operation mode

Note 2

ON/OFF of

No.3 compressor

Step 4 Step 5

Step 4

Step 5

Note 4

Step 6

Step 5

Step 4

–89–

(Example 4)

ON/OFF of

No.1 compressor

ON/OFF of

No.2 compressor

A-minute

5

minutes

Less than

10 minutes

5

minutes

Less than

10 minutes

5

minutes

End of initial operation mode

10

minutes

Note 3

ON/OFF of

No.3 compressor

Step 4

Step 5

Step 6 Step 5

Note 4

Step 4

Step 5 Step 4

Step 6

Note 4

Step 6

Note 4

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

restart. 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.

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 set

to the heating mode, those indoor units will not be operated and the heating indicator will be flashed on the remote controller. The reverse also applies when the outdoor unit is operated in the heating mode and the cooling indicator will be flashed on the remote controller.

–90–

(17) Emergency response operating mode

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

1) Starting the Emergency Operation Mode

1 Trouble occurs (Display the trouble code root and trouble code on the remote control). 2 Carry out trouble reset with the remote control. 3 If the trouble 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 trouble reset (without entering the emergency operation mode).

4 If the same trouble 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 trouble.

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

Emergency Mode Pattern

When a No. 1 Compressor Failure Occurs

When No. 2 Compressor Failure Occurs

Constant capacity unit Error (stop)

Codes for which emergency operation is possible.

Serial transmission trouble 0403 VDC sensor/circuit trouble 4200 Breaking of overcurrent 4210 Bus voltage trouble 4220 Radiator panel overheat protection 4230 Overcurrent protection 4240 Cooling fan trouble 4260 Thermal sensor trouble (Radiator panel) 5110 IDC sensor/circuit trouble 5301

Overcurrent protection

Error codes other than those at right.

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).

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.

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

No.1

No.2

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

TH6 20°C (cooling) or heating TH6 < 20°C (cooling) × 45 ~ 55 % No.2 Compressor only TH6 20°C (cooling) or heating TH6 < 20°C (cooling) × 45 ~ 55 % No.1 Compressor only

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

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

–91–

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

1 Cumulative compressor operation time in the cooling mode exceeds 4 hours. 2 Cumulative compressor operation time in the heating mode exceeds 2 hours. 3 Emergency operation mode trouble detected.

(Control During and After Termination)

• 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 1 to 4 in 1).

–92–

[1]-4 PUHY-600·650·700·750 YSMF-B

(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 capacitor compressor is controlled so that the evaporation temperature is between 0 and 5°C in cooling mode and that the high pressure is between 18 and 20 kg/cm MPa) in heating mode.

• The fluctuation of the frequency of the variable capacitor 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)

2

G (1.76 and 1.96

No.3

No.1 No.2

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

1 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.

2 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.)

3 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.

4 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.

Constant

capacity

unit

Variable capacity

unit

1 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 started.

–93–

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.

• While the constant capacity unit is in operation, if the high pressure (63HS) value exceeds 25 kg/cm

2

G (2.45 MPa),

the constant capacity unit compressor will be stopped.

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 the 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.

ON

OFF

– 30°C

– 15°C

• 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 25 kg/cm MPa) and turned OFF when it is 20 kg/cm

ON

OFF

20 kg/cm2G

(1.96 MPa) (2.45 MPa)

2

(1.96 MPa) or less.

25 kg/cm2G

2

(2.45

–94–

(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.

–95–

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

Item

At compressor is started

Compressor stopped during cooling 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)

SV1

ON OFF

ON for 4 minutes

ON

ON for 3 minutes

ON

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

—

Pd 27.5 kg/cm2G

(2.70 MPa)

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

—

ON OFF

Normally ON

TH2 < – 30°C

23 kg/cm2G

Pd

(2.26 MPa)

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

SV4

—

TH2 – 15°C

Pd 23 kg/cm2G (2.26 MPa) and after 30 seconds

20 kg/cm2G

Pd

(1.96 MPa)

When the discharge temperature (Td) is risen up

* Example of operation of SV1

Compressor

Bypass solenoid valve (SV1)

Start

(4-minute)

Thermo. OFF

• Td > 130°C

and

—

• Pd > 20 kg/cm

(1.96 MPa)

or TH2 < – 10°C

Thermo. ON

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

Defrost

Stop

2

G

Td

115°C

–96–

SV22

SV32

COMP

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.

SV1

ON OFF

ON for 4 minutes

ON for 3 minutes

ON during normal operation

Low pressure (63LS) < 1.0 kg/cm

2

G

(0.098 MPa)

Pd 26.5 kg/cm2G

(2.55 MPa)

When the discharge temperature > 130°C and high pressure (Pd) > 20 kg/cm

2

G (1.96 MPa) or low pressure (63LS) <

2.5 kg/cm

2

G

(0.245 MPa).

Low pressure (63LS)

1.5 kg/cm2G (0.147 MPa)

Pd 23 kg/cm2G (2.25 MPa) and after 30 seconds

When the discharge tempera-

115°C

ture

SV4

ON OFF

—

When the high pressure (Pd) is fallen up.

—

* Example of SV1 operation

Compressor

Bypass solenoid valve (SV1)

Start

(4-minute)

Thermo. OFF

Thermo. ON

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

(4-minute)

Defrost

(*1)

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

• Operation of solenoid valve

Solenoid valve

Status

Full-load (Operating at 100 % capacity)

Un-load (Capacity control operation)

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

SV22 SV32

Coil Valve Coil Valve

OFF Open OFF Closed

ON Closed ON Open

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

2

G (1.18 MPa) and

12 kg/cm low pressure saturation temperature (ET) < – 20°C

Stop

When the high pressure (Pd) 13 kg/cm2G (1.27 MPa) and after 30 minutes of operation.

–97–

Mitsubishi MEE99K045 Service Manual

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