Mitsubishi MEE99K029J Service Manual

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AIR CONDITIONERS CITY MULTI

Models PQRY-P200YMF-B, P250YMF-B

CMB-P104, P105, P106, P108, P1010, P1013, P1016V-E

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 ........................... 15

[3] Equipment Composition .................................................................. 17

[4] Electrical Wiring Diagram ................................................................ 18

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

[6] Function of Dip SW and Rotary SW................................................ 29

[7] External Input/Output Specifications ............................................... 32

3 TEST RUN ............................................................................................. 33

[1] Before Test Run ............................................................................... 33

[2] Address setting ............................................................................... 38

[3] Test Run Method ............................................................................. 43

4 GROUPING REGISTRATION OF INDOOR UNITS WITH REMOTE

CONTROLLER ....................................................................................... 44

5 CONTROL .............................................................................................. 50

[1] Control of Heat Source Unit ............................................................ 50

[2] Control box cooling system ............................................................. 54

[3] Control of BC Controller .................................................................. 55

[4] Operation Flow Chart ...................................................................... 56

[5] List of Major Component Functions ................................................ 62

[6] Resistance of Temperature Sensor ................................................. 65

6 REFRIGERANT AMOUNT ADJUSTMENT ............................................ 66

[1] Refrigerant Amount and Operating Characteristics ........................ 66

[2] Adjustment and Judgement of Refrigerant Amount ........................ 66

7 TROUBLESHOOTING ........................................................................... 75

[1] Principal Parts ................................................................................. 75

[2] BC Controller Disassembly Procedure.......................................... 103

[3] Self-diagnosis and Countermeasures Depending on the

Check Code Displayed .................................................................. 109

[4] LED Monitor Display ..................................................................... 131

8 PREPARATION, REPAIRS AND REFRIGERANT REFILLING

WHEN REPAIRING LEAKS ................................................................. 141

[1] Location of leaks: Extension piping or indoor units (when cooling) ... 141

[2] Location of leaks: Heat Source Unit (Cooling mode) .................... 141

[3] Location of Leaks: Extension Piping or Indoor Units

(Heating mode) ............................................................................. 142

[4] Location of Leaks: Heat Source Unit (when Heating) ................... 142

9 CHECK THE COMPOSITION OF THE REFRIGERANT ..................... 143

0 DIFFERENCES BETWEEN THE PREVIOUS REFRIGERANT

AND THE NEW REFRIGERANT ......................................................... 145

[1] Chemical Characteristics .............................................................. 145

[2] Chances in Composition ............................................................... 145

[3] Pressure Characteristics ............................................................... 146

A REFRIGERATOR OIL .......................................................................... 147

[1] Refrigerator Oil with HFC Based Refrigerants .............................. 147

[2] Influence of Contaminants ............................................................ 147

Safety precautions

Before installation and electric work

▲

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

▲

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

▲

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

▲

This equipment may have an adverse effect on equipment on the same electrical supply system. Please report to or take consent by the supply

▲

authority before connection to the system.

Symbols used in the text

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

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

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: 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

servicing. (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 Heat Source 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,

poisonous 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 heat source 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 (R407C) specified on the unit.

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

refrigerant, 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

prevent 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,

electric 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

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

• To dispose of this product, consult your dealer.

• The installer and system specialist shall secure safety against leakage according to local regulation or standards.

- Following standards may be applicable if local regulation are

not available.

• Pay a special attention to the place, such as a basement, etc. where refrigeration gas can stay, since refrigerant is heavier than the air.

1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

Caution

Do not use the existing refrigerant piping.

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

Use refrigerant piping made of **C1220T 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 **: Comparable to CU-DHP (CUPROCLIMA), Cu-bl

(AFNOR), C12200 (ASTN), SF-Cu (DIN)

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

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

Use a vacuum pump with a reverse flow check valve.

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

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

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

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

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

Do not use a charging cylinder.

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

Be especially careful when managing the tools.

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

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

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

Use liquid refrigerant to seal the system.

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

Do not use a refrigerant other than R407C.

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

If 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-brown Charged with liquid refrigerant

der

Valve

Liquid

Valve

Liquid

Reasons :

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

Note :

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

[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 WR2 (PQRY) (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–

2 COMPONENT OF EQUIPMENT

[1] Appearance of Components

Heat source unit

Heatexchanger

Control Box

4-way Valve

SV Block

Compressor

CV Block

Drier

–8–

Accumulator

Control Box

Front View

INV board

Transformer (T01)

RELAY board

MAIN board

Inner View

Terminal block TB8 UNIT ON/OFF, Pump inter lock

Cooling fan (MF1)

Transistor

Module

TRM3

TRM2

TRM1

Terminal block TB1A Power Source

DC reactor (DCL)

Terminal block TB3 Transmission

Terminal block TB7 Transmission (Centralized Control)

Choke coil (L2)

Fuse (F3)

Capacitor (C2, C3)

Diode

stack

(DS)

Magnetic Contactor (52C)

Noise Filter

–9–

MAIN board

CNTR CNVCC4 CNS1 CNS2 CN40 CN41

Power source for control (5V)

CNVCC3

Power source for control

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

CN51

CN3D

LD1 Service LED

SW3SW4CN20

SWU1SWU2

SW1SW2

–10–

INV board

Output to transistor module

CN3 CN2-1 CN2-2 CN2-3

CNVCC2 Power supply (5V)

CNVCC1

Power supply

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

CNL2

CNVDC

CN52C

CNFAN

CNAC2 Power source

1 L2 3 N

CN30V

CNTH

CNCT

CNR CNRS2 SW1

–11–

RELAY board

–12–

BC controller

BC board

CNTR

CN02 M-NET transmission

CN03

CN12 Power supply

1 EARTH 3 N 5 L

SW4 SW2 SW1

–13–

RELAY 10 board

RELAY 4 board

–14–

[2] Refrigerant Circuit Diagram and Thermal Sensor

: Solenoid valve

: Orifice

: Capillary

: Check valve

: Thermal sensor

: Strainer

SP : Service port

ACC : Accumulator

Heat source unit

Pipe length 10m

Indoor capacity 100%

TH10, THINV

: MPa for 63HS, 63LS

Heating : Indoor 21/– Inlet water 20˚C

*Operation data of PQRY-P250YMF-B

*Operation Condition Cooling : Indoor 27/19.5 Inlet water 30˚C Water volume 4.93m

Standard operation data are shown for cooling

in the C column and heating in the H column.

Units for each balue are : ˚C for TH1

ST8

SV6

Distributor

SV4

SV3

CV11

SV5

CV7

SV72

30 20

TH6

Water

Water heat exchanger

(Double coil type)

SV71

ST7d

ST7b ST7cST7a

BV1

CV3

CV10

CV9

CV8

ST1

CV2

CV5

CV4

CV6

BV2

Orifice

Water

circulating

Solenoid Valves

Block

4way valve

ST2

SP1

2.2

2.15

63HS

SV2

ST5

SV73

CP1

Oil

separator

ST6

CP3

SV1

99.0 79.0

TH1

Accumulator

SLEV

TH3

SP2

ST3

9.0

23.5

TH10

ST4

TH4

CP2

CP4

78 60

30.0 29.0

TH INV

6.2 6.54.3 5.0

0.50 0.54

63LS

Cooling INV HEX

TH2

TH9

LEV2

Check Valves Block

32.0 22.0

Drier

Compressor

CV1

63H

–15–

: Solenoid valve

: Orifice

: Capillary

: Check valve

: Thermal sensor

: Strainer

SP : Service port

ACC : Accumulator

BC controller, Indoor unit

Indoor

units

SVC

Valves Block

SVA

SVB

TH23

TH21

TH11

TH22

PS1

LEV

LEV1

PS3

BC controller

CMB-P104V-E

Gas/liquid separator

TH12

SVM

TH15

LEV3

TH16

–16–

[3] Equipment Composition

A. Heat source unit

PQRY-P200YMF-B

PQRY-P250YMF-B

B. BC controller

4-branch type 5-branch type 6-branch type 8-branch type 10-branch type 13-branch type 16-branch type

CMB-P104V-E CMB-P105V-E CMB-P106V-E CMB-P108V-E CMB-P1010V-E CMB-P1013V-E CMB-P1016V-E

C. Branch pipe kit/joint pipe kit

Branch pipe kit

CMY-Y102S-F CMY-Y102L-F

Joint pipe kit

CMY-R160-G: for V-E type

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

Ceiling mounted

built-in

PDFY-P

Wall mounted

Ceiling

suspended

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

80VKM 100VKM 125VKM

71VMH

80VMH 100VMH 125VMH

71VM

80VM 100VM 125VM

100VGM 125VGM

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 - - - -

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

–

ON/OFF

1Hr.

˚C

FILTER

CHECK MODE

TEST RUN

NOT AVAILABLE

ON OFFCLOCK

FILTER

CHECK

TEST RUN

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

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

CLOCK/

TEMP.

VENTILATION

PATTERN

INS.

TIMER

REMOTE

RESET

MODE

PROHIBITION

ENTER

MJ-103MTRA

DEL.

PROGRAM TIMER PAC-SC32PTA

SET

SET/MONITOR TODAY

SMTWTFS

CLOCK

SET BACK

036912

12 15 18 21 24

WEEKLY

DAILY

SET BACK ON

SETTING

SET BACK

DAILY TIMER

OFF

–17–

TEMP.

CENTRAL

TEMP.CHECK

ON/OFF

PAC-SE51CRA

˚C

[4] Electrical Wiring Diagram

Refer to the [6]

the switch operations.

243

1123 67

181221123712631523445312

234

56123

F01

250VAC

2A F

CN33

(3P)

CN20

(3P)

223

221

131

CNS1

(2P)

CNAC2

(3P)

CNCT

(4P)

CNVDC

(4P)

CNS2

(3P)

CNX10

(3P)

CNR

(3P)

CN52C

(3P)

CNTH

(2P)

X02

X01

SV1

LEV2

CH1

TB1A

250VAC

2A F

123

TH1

TH2

Black

White

Red

63HS

123

Black

White

Red

63LS

SLEV

White

Red

Black

Blue

Green/

Yellow

TB3

TB7

ZNR4

52C

TRM1

DCL

T01

250VAC

1A F

CNTR1

TRM2

C2E1

B2 E2 E2 E1 B1

C2E1

TRM3

C2E1

B2 E2 E2 E1 B1

C14

C15

C16

DCCT

White

C25

C22C21

C24C23

C20

MC1

Motor

(Compressor)

Red Black

34 2

2341217654321

56123

52C

X02

X01

X10

CNVCC1

(6P)

CNVCC2

(6P)

CNVCC3

(6P)

CNVCC4

(2P)

CNRS3

(7P)

CNRS2

(7P)

CNFAN

(3P)

THHS

CNH

(3P)

CNL

(3P)

CN2-1

(2P)

CN2-2

(2P)

CN2-3

(2P)

CN3

(6P)

CN32

(3P)

CNLV1

(5P)

CNTR

(3P)

CNLV2

(5P)

CNL2

(2P)

CN30V

(2P)

MF1

Purple

Black Yellow Orange

Power circuit board

(INV board)

BOX BODY

Red Brown

Black Purple

Black

Yellow

White

Red

Brown

Orange

Red

Blue

34251

CN51

(5P)

12V

5 : DIP SW3-3 OFF : water freeze signal

ON : trouble signal

4 : Compressor ON/OFF

Control circuit board

(MAIN board)

TH10THINV

CN12

(2P)

CN09

(2P)

CN06

(2P)

CN05

(4P)

CN03

(3P)

CN02

(8P)

CN01

(2P)

CNOUT1

(6P)

TH9

CNRT1

(5P)

54321

65432

X08

X09

CN36

(6P)

CN37

(6P)

CN38

(3P)

65432

X06

X07

TH4 TH3 TH6

63H

CH3

CH2

SV2

21S4

X05

X04

SSR

X10

321

123123456

CN34

(6P)

CN35

(3P)

432121

BOX BODY

TB1B

Red

White

Black

Blue

Red

White

Black

Blue

65432

detection

circuit

SV4

SV3

SV6

SV5

CN63PW

(4P)

432

321

CNAC3

(4P)

AC1

AC4

(to CNAC4)

26W

detection

circuit

RELAY board

(to CNAC3)

AC4 AC1

65432

CNOUT2

(6P)

63PW

TB8

123

circuit

detection

X25

CN83

(7P)

753

SV73

SV71

SV72

X23

X22

X21

98765

CN81

(9P)

432

CNAC4

(4P)

32 1

123

CNPW

(4P)

Noise

Filter

Diode

stack

Code heater

(Accumulator liquid

level detect)

High pressure

switch

Freeze protect

switch

Pump

interlock

BOX BODY

132

CN3D

(3P)

DEMAND

Unit ON/OFF

FB1

Inverter

Controller Box

Terminal

Block

Terminal

Block

Power source

3N~

380/400/415V

50/60Hz

Connect to

Indoor and

remote controller

Crank case heater

(Compressor)

• PQRY-P200·250YMF-B

–18–

SV1, SV2

4-way valve

Solenoid valve (Discharge-suction bypass)

21S4

Aux. relay

Discharge pipe temp. detect

Saturation evapo. temp. detect

X1,2,4~10

X21~23,25

Electronic expansion valve

(Heat exchanger for inverter)

Electronic expansion valve (Oil return)

High pressure sensor

Low pressure sensor63LS

63HS

SLEV

LEV2

Solenoid valve

(Heat exchanger capacity control)

Solenoid valve

(Heat exchanger capacity control)

SV71~73

SV3~6

Solid state relaySSR

Varistor

Name

Symbol

DCL

(Power factor improvement)

DC reactor

DCCT Current Sensor

ZNR4

FB1 Ferrite core

Radiator panel

52C

MF1

Magnetic contactor

(Inverter main circuit)

Chock coil (Transmission)

Diode stack

Power transistor module

Niose FilterNF

TRM1~3

OA temp. detect

High pressure liquid temp.

Compressor shell temp.

Radiator panel temp. detect

Outlet temp. detect of

heat exchanger for inverter

Lower

Upper

Accumulator liquid

temp. detect

Thermistor

THHS

TH10

TH9

TH6

TH4

TH3

TH2

TH1

THINV

Earth terminal

21S4

SV1

SV2

SV3

SV4

SV72SV71SV5

SV6

SV73

SSR

(Upside) (Underside)

SV3

SV4

SV5

SV6

TH6

THINV

TH2

21S4

26W

INVERTER

SV72 SV71

OIL

ACCUMULATOR

TH9

LEV2

SLEV

TH4

TH3

SV1

SV73

SV2

63H

TH1

TH10

63HS

63LS

CONTROLLER

BOX

SEPARATOR

(Underside)

(Upside)

DCCT

ZNR4

THHS

DCL

TB7

TB3

TB1A

TB8

52C

TB1B

MF1

TRM1

TRM2

TRM3

RELAY

board

T01

MAIN board

INV board

TB7

TB3

TB8

TB1A

Display

Relay output

display

(Lighting)

Check display1

(Blinking)

(at factory shipment)

Display at LED lighting (blinking) Remarks SW1 operation

FLAG1 FLAG2 FLAG3 FLAG4 FLAG5 FLAG6 FLAG7 FLAG8

Display the address and error code by turns

Always

lighting

FLAG8 always lights

at microcomputer

power ON

During

compressor

run

Crankcase

heater

1102

FLAG1

FLAG2

FLAG3

FLAG4

FLAG8

FLAG7

FLAG6

FLAG5

ON:1

OFF:0

1 2 3 4 5 6 7 8 9 10

ON:1

OFF:0

1 2 3 4 5 6 7 8 9 10

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

LD1

• PQRY-P200·250YMF-B

–19–

Symbol explanation

EARTH

Terminal block

(for Transmission)

TB02

Terminal block

(for power source)

TB01

Note:TB02 is terminal block for transmission.

Never connect power line to it.

NameSymbol

Solenoid valve

Expansion valve

Thermister sensor

Transformer

NameSymbol

SV1 4A

SV1 4B

SV1 4C

SVM

TH11 16

LEV1,3

PS1,3 Pressure sensor

Transmission line

Shield wire

/N 220V 240V 50Hz

Power source

BC Board

LEV1

TB01

SVM

SV4B

SV4A

SV4C

SV3B

SV3A

SV3C

SV2B

SV2A

SV2C

SV1C

SV1A

SV1B

}

CN38

CNTR

CN02

CN12

153

CNVCC1

X30

X31

X32

X33

X21

}

DC 30V

654321654321

LEV3

CNP1

CNP3

12321

CN03

CN13

CN10

CN11

CN07 CN05

TH11

TH12

TH15

TH16

PS1

PS3

20 22V

TB02

CN26

CN27

CN28

CN29

TB01

220 240V

CN36

• CMB-P104V-E

–20–

Symbol explanation

EARTH

Terminal block

(for Transmission)

TB02

Terminal block

(for power source)

TB01

Note:TB02 is terminal block for transmission.

Never connect power line to it.

NameSymbol

Solenoid valve

Expansion valve

Thermister sensor

Transformer

NameSymbol

SV1 5A

SV1 5B

SV1 5C

SVM

TH11 16

LEV1,3

PS1,3 Pressure sensor

Transmission line

Shield wire

/N 220V 240V 50Hz

Power source

BC Board

LEV1

TB01

SV4B

SV4A

SV4C

SV3B

SV3A

SV3C

SV2B

SV2A

SV2C

SV1C

SV1A

SV1B

}

CN38

CNTR

CN02

CN12

153

CNVCC1

X30

X31

X32

X33

X21

}

DC 30V

654321654321

LEV3

CNP1

CNP3

12321

CN03

CN13

CN10

CN11

CN07 CN05

TH11

TH12

TH15

TH16

PS1

PS3

20 22V

TB02

CN26

CN27

CN28

CN29

TB01

220 240V

SV5C

SV5A

SV5B

X10

X34

CN30

SVM

CN36

• CMB-P105V-E

–21–

EARTH

Note:TB02 is terminal block for transmission.

Never connect power line to it.

Transmission line

Shield wire

/N 220V 240V 50Hz

Power source

BC Board

LEV1

TB01

SV6B SV6A SV6C

SV5C

SV5A

SV5B

SV4B

SV4A

SV4C

SV3B

SV3A

SV3C

SV2B

SV2A

SV2C

SVM

SV1C

SV1A

SV1B

}

4321

1234

CN38

CNTR

CN02

CN12

153

CNVCC1

X30

X31

X32

X33

X10

X34

X12

X11

X35

X21

}

DC 30V

654321654321

LEV3

CNP1

CNP3

12321

CN03

CN13

CN10

CN11

CN07 CN05

TH11

TH12

TH15

TH16

PS1

PS3

20 22V

TB02

CN26

CN27

CN28

CN29

CN30

CN31

TB01

220 240V

CN36

Symbol explanation

Terminal block

(for Transmission)

TB02

Terminal block

(for power source)

TB01

NameSymbol

Solenoid valve

Expansion valve

Thermister sensor

Transformer

NameSymbol

SV1 6A

SV1 6B

SV1 6C

SVM

TH11 16

LEV1,3

PS1,3 Pressure sensor

• CMB-P106V-E

–22–

EARTH

}

Power source

}}

Power source

/N 220V 240V 50Hz

Note:TB02 is terminal block for transmission.

Never connect power line to it.

Transmission line

Shield wire

SVM

BC Board

CN38

CNTR

CN50

CN51

7654321123456

CN02

CN12

153

CNVCC1

X30

X31

X32

X33

X10

X34

X12

X11

X35

X21

}

DC 30V

654321654321

LEV3 LEV1

CNP1

CNP3

123

CN03

CN13

CN10

CN11

CN07 CN05

CN36

TH11

TH12

TH15

TH16

PS1

PS3

20 22V

TB02

CN26

CN27

CN28

CN29

CN30

CN31

TB01

220 240V

LEV1

7654321

TB01

SV6B SV6A

SV6C

RELAY4 Board

SV5C

SV5A

SV5B

SV4B

SV4A

SV4C

SV3B

SV3A

SV3C

SV2B

SV2A

SV2C

CN32

CN33

CN39

SV7C

SV7A

SV7B

SV8C

SV8A

SV8B

SV1C

SV1A

SV1B

X14

X13

X36

X37

X15

X16

98765432116 15 1011121314

12345678910111213141516

CN52

75317531

Symbol explanation

Terminal block

(for Transmission)

TB02

Terminal block

(for power source)

TB01

NameSymbol

Solenoid valve

Expansion valve

Thermister sensor

Transformer

NameSymbol

SV1 8A

SV1 8B

SV1 8C

SVM

TH11 16

LEV1,3

PS1,3 Pressure sensor

• CMB-P108V-E

–23–

EARTH

}

Power source

}}

Power source

/N 220V 240V 50Hz

Note:TB02 is terminal block for transmission.

Never connect power line to it.

Transmission line

Shield wire

SV10B SV10A SV10C

SV9B SV9A

SV9C

BC Board

CN38

CNTR

CN50

CN51

7654321123456

CN02

CN12

153

CNVCC1

X30

X31

X32

X33

X10

X34

X12

X11

X35

X21

}

DC 30V

654321654321

LEV3 LEV1

CNP1

CNP3

123

CN03

CN13

CN10

CN11

CN07 CN05

CN36

TH11

TH12

TH15

TH16

PS1

PS3

20 22V

TB02

CN26

CN27

CN28

CN29

CN30

CN31

TB01

220 240V

LEV1

7654321123456

CN35

TB01

SV6B SV6A

SV6C

SVM

RELAY4 Board

SV5C

SV5A

SV5B

SV4B

SV4A

SV4C

SV3B

SV3A

SV3C

SV2B

SV2A

SV2C

CN32

CN33

CN34

CN39

SV7C

SV7A

SV7B

SV8C

SV8A

SV8B

SV1C

SV1A

SV1B

X14

X13

X36

X37

X15

X16

98765432116 15 1011121314

12345678910111213141516

X18

X17

X38

X39

X19

X20

CN52CN53

5731753175317533 31

Symbol explanation

Terminal block

(for Transmission)

TB02

Terminal block

(for power source)

TB01

NameSymbol

Solenoid valve

Expansion valve

Thermister sensor

Transformer

NameSymbol

SV1 10A

SV1 10B

SV1 10C

SVM

TH11 16

LEV1,3

PS1,3 Pressure sensor

• CMB-P1010V-E

–24–

EARTH

TB02

TB01

Name

Symbol

Terminal block

(for Transmission)

Solenoid valve

Terminal block

(for power source)

Pressure sensor

Expansion valve

Thermister sensor

Transformer

Name

SV1~13A

SV1~13B

SV1~13C

SVM

Symbol

TH11~16

LEV1,3

PS1,3

DC 30V

}

Shield wire

Transmission line

Power source

}

Power source

~/N 220V~240V 50Hz

RELAY10

Board

BC Board

CN39

654321 1234567

CN51

CN50

135

CN12

CNOUT3

CNOUT1

1571571357

CNVCC2

CN42

X46

X47

X48

CNOUT2

CNOUT4

CN41

CN40

X41

X44

X40

X43

X42

X45

X20

X18

X19

X17

X39

X38

CNVCC1

X16

X15

X37

X36

X13

X14

X30

X31

X32

X33

X10

X34

X12

X11

X35

X21

6 5432

LEV3 LEV1

CNP1

CNP3

12321

CN03

CN02

CN13

CN10

CN11

CN07 CN05

CN34

CN33

1357

CN32

TH11

TH12

TH15

TH16

TB02

CN38

CN26

CN27

CN28

CN29

CN30

CN31

TB01

CN35

CNTR

SV1B

SV1A

SV1C

SV2C

SV2A

SV2B

SV3C

SV3A

SV3B

SV4C

SV4A

SV4B

SV5B

SV5A

SV5C

SV9C

SV9A

SV9B

SV10C

SV10A

SV10B

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

14 13 12 11 101516 123456789

SV8B SV8A SV8C

SV7B SV7A SV7C

SVM

SV6C

SV6A

SV6B

SV11C

SV11A

SV11B

SV12C

SV12A

SV12B

SV13C

SV13A

SV13B

PS1

PS3

Note : 1. TB02 is transmission terminal block.

Never connect power line to it.

2. The initial set values of switch on CONT.B are

as follows : SW1 : 0, SW2:0.

20 22V 220 240V

CN36

• CMB-P1013V-E

–25–

EARTH

TB02

TB01

Name

Symbol

Terminal block

(for Transmission)

Solenoid valve

Terminal block

(for power source)

Pressure sensor

Expansion valve

Thermister sensor

Transformer

Name

SV1~16A

SV1~16B

SV1~16C

SVM

Symbol

TH11~16

LEV1,3

PS1,3

DC 30V

}

Shield wire

Transmission line

Power source

}

Power source

~/N 220V~240V 50Hz

CN39

654321 1234567

CN51

CN50

135

CN12

CNOUT3

CNOUT1

1571571357

CNVCC2

CN42

X46

X47

X48

CNOUT2

CNOUT4

CN41

CN40

X41

X44

X40

X43

X42

X45

X20

X18

X19

X17

X39

X38

CNVCC1

X16

X15

X37

X36

X13

X14

X30

X31

X32

X33

X10

X34

X12

X11

X35

X21

6 5432

LEV3 LEV1

CNP1

CNP3

12321

CN03

CN02

CN13

CN10

CN11

CN07 CN05

CN34

CN33

1357

CN32

TH11

TH12

TH15

TH16

TB02

CN38

CN26

CN27

CN28

CN29

CN30

CN31

TB01

CN35

CNTR

SV1B

SV1A

SV1C

SV2C

SV2A

SV2B

SV3C

SV3A

SV3B

SV4C

SV4A

SV4B

SV5B

SV5A

SV5C

SV9C

SV9A

SV9B

SV10C

SV10A

SV10B

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

14 13 12 11 101516 123456789

SV8B SV8A SV8C

SV7B SV7A SV7C

SVM

SV6C

SV6A

SV6B

SV11C

SV11A

SV11B

SV12C

SV12A

SV12B

SV13C

SV13A

SV13B

PS1

PS3

Note : 1. TB02 is transmission terminal block.

Never connect power line to it.

2. The initial set values of switch on CONT.B are

as follows : SW1 : 0, SW2:0.

X57

X53

X52

X56

X55

CN45

CN44

CN43

X50

SV14C

SV14A

SV14B

SV15A

SV15B

SV16C

SV16A

SV16B

SV15C

X54

X51

X49

RELAY10

Board

BC Board

20 22V 220 240V

CN36

• CMB-P1016V-E

–26–

[5] Standard Operation Data

1 Cooling operation

Items

Power source

Ambient temp.

Indoor

Circulated water temp. (Intet)

Quantity

Indoor unit

Quantity in operation

Model

Main pipe

Condition

Piping

Branch pipe

Total piping length

Indoor unit fan notch

Refrigerant volume

Compressor volts / Frequency

Heat source unit

V/Hz

DB/WB

°C

Q’ty

–

V/Hz

PQRY-P200YMF-B PQRY-P250YMF-B

380-415V/50Hz 380-415V/50Hz

27.0/19.5 27.0/19.5

30 30

63 63 50 25 125 40 63 25

55555555

25 25

Hi Hi Hi Hi Hi Hi Hi Hi

11.4 12.2

380 415 380 415

270/77 270/77 340/98 340/98

14.0 12.8 18.8 17.2

Indoor unit

BC controller (1, 3)

Oil return

LEV opening

High pressure/Low pressure

BC controller liquid/Intermediate

Pressure

Discharge (TH1)

Accumulator

Heat

Suction (Comp)

source unit

CS circuit (TH2)

Liquid level

Sectional temperature

Shell bottom (Comp)

Indoor unit

LEV inlet

Heat exchanger outlet

Inlet

Outlet

Upper (TH4)

Lower (TH3)

Pulse

kg/cm

(MPa)

˚C

330 460 430 300 410 330 460 300

2000 240 2000 260

180 330

22.0/5.3 21.5/5.0

(2.20/0.52) (2.15/0.50)

20.9/20.9 20.4/20.4

(2.09/2.09) (2.04/2.04)

101 99.0

10 10

12 12

4.9 4.3

30 30

23.5 23.5

70 78

26 30

15 15

αOC

0.23 0.23

–27–

2 Heating operation

Items

Power source

Ambient temp.

Circulated water temp.

Indoor

Quantity

Indoor unit

Quantity in operation

Model

Main pipe

Condition

Piping

Branch pipe

Total piping length

Indoor unit fan notch

Refrigerant volume

Compressor volts/Frequency

Heat source unit total current

Heat source unit

V/Hz

DB/WB

°C

Q’ty

–

V/Hz

PQRY-P200YMF-B PQRY-P250YMF-B

380-415V/50Hz 380-415V/50Hz

21.0/– 21.0/–

20 20

63 63 50 25 125 40 63 25

55555555

25 25

Hi Hi Hi Hi Hi Hi Hi Hi

11.4 12.2

380 415 380 415

250/69 250/69 330/88 330/88

13.1 12.0 16.1 14.8

Indoor unit

BC controller (1, 3)

Oil return

LEV opening

High pressure/Low pressure

BC controller liquid/Intermediate

Pressure

Discharge (TH1)

Accumulator

Heat

Suction (Comp)

source unit

CS circuit

Liquid level

Sectional temperature

Shell bottom (Comp)

Indoor unit

LEV inlet

Heat exchanger outlet

Inlet

Outlet

(TH2)

Upper (TH4)

Lower (TH3)

Pulse

kg/cm

(MPa)

˚C

600 950 750 400 750 600 950 400

60 600 60 850

115 115

22.0/5.6 22.0/5.4

(2.20/0.56) (2.20/0.54)

21.0/18.0 21.0/18.0

(2.10/1.80) (2.10/1.80)

75 79

–1 –1

–4 –2

–1 –1

28 29

55 60

38 40

80 85

αOC

0.28 0.28

–28–

[6] Function of Dip SW and Rotary SW

(1) Heat source unit

Switch Function

1~2

SWU SW1

SW2

SW3

SW4

Unit address setting

1~8

For self diagnosis/ operation monitoring

9~10

Centralized control switch

Deletion of connection information.

Deletion of error history.

Adjustment of refrigerant Vol ume

5 6 7

Operation ON signal output switching Relay contact output TB8-1,2

Disregard pump interlock trouble.

SW3-2 Function valid/

invalid Indoor unit test operation

CN51-3,5 Output switching

Freeze prevention operation

Target Te (α) at cooling-

only Pump down operation

Target Tc (High pressure)

at heating 8 9

SW4-2 function valid/

Invalid 2

Configuration compensa-

tion value 3

Models

Function according to switch operation Switch set timing

When off When on When off When on

Set on 51~100 with the dial switch.

LED monitering display

–

Centralized control not connected. Storing of refrigeration system connection information.

Ordinary control

– –

The relay closes during compressor operation.

Normal

– –

SW3-2 Function invalid

Stop all indoor units.

Water heat exchanger freeze prevention signal Normal

– –

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

–

– –

–2˚C

Invalid

50˚C

– –

Model P200

Invalid

–

Centralized control connected. Deletion of refrigeration system connection information. Deletion

Refrigerant volume adjustment operation.

The relay closes during reception of the cooling or the heating operation signal from the controller. (Note: It is output even if the thermostat is OFF (when the compressor is stopped).)

Disregard trouble

SW3-2 Function valid

All indoor units test operation ON. Heat source unit abnormal output Freeze prevention operation*

–

– –

–5˚C

Valid

53˚C

– –

Model P250

Valid

–

Before power is turned on. During normal operation when power is on. Should be set on OFF. Before power is turned on.

Before power is turned on.

During normal operation when power is on.

At all times

During normal operation when power is on. When SW3-1 is ON after power is turned on. At all times

At all times At all times

During Comp stop (only when power changes from OFF → ON) During normal operation when power is on.

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

Invalid 2 hours after compressor starts.

– –

–

Note:

• SWU1~2=00 when shipped from the factory. Other factory settings are indicated by shaded portions.

• If the address is set from 01 to 50, it automatically becomes 100. * Freeze prevention operation

When the water temp. (TH6) below less 5˚C during compressor is stopping, the compressor starts to run with cooling mode to prevent the water freeze.

–29–

(2) Indoor unit

DIP SW1, 3

Switch SW name

Room temp. sensor position

Clogged filter detect.

Filter duration

OA intake

Remote display select.

SW1

Humidifier control

Heating thermo. OFF airflow

Power failure automatic

return

Power source start/stop

Model selection

Cooling capacity saving for PKFY-P. VAM,

Louver

effective/ineffective

Vane

Vane swing function

Vane horizontal angle

Vane angle set for cooling

SW3

Heating 4deg up

Operation by SW

OFF ON OFF ON

Indoor unit inlet

None

100h

Ineffective

Fan output display

At stationary heating

Very low speed

SW1-7 setting

Ineffective

Heat pump

None

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

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 Dip SW setting is only effective during unit stopping (remote controller OFF) for SW1, 2, 3 and 4 commonly

and the power source is not required to reset.)

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

Setting of DIP SW2

Model P20 P25 P32 P40 P50 P63

Capacity (model name) code

SW2 setting

45 681013

OFF

Model P71 P80 P100 P125 P140

Capacity (model name) code

SW2 setting

14 16 20 25 28

OFF

–30–

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

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 –

OFF OFF ON –

SW4

220V 240V

Switch Function Operation by switch Switch set timing

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

SWA

1~3

Ceiling height setting

1~3

For options

* The ceiling

height is changed by SWB setting.

(PLFY-P-VLMD)

* As this switch is used by interlocking with SWC,

refer to the item of SWC for detail.

Ceiling height

33.5m

22.8m

12.3m

Always after powering

SWB

SWC

1~3

Setting of air outlet opening

1~2

Airflow control

(PLFY-P-VKM)

2-way

3-way

4-way

SWB

SWA

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

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

Option

Standard

* Set to the option to install the high efficiency

filter

(PLFY-P-VLMD)

SWA

Option

Standard

SWC

(PDFY-P-VM)

SWA

Option

Standard

SWC

123

Always after powering

(3) BC controller unit

DIP SW4

Switch Function

1 Models V-E type V-D type

SW4

2~8 –– –

Function according to switch operation

When off When on

*If the EPROM for the BC controller is WF30334, the controller is exclusively V-D type.

–31–

[7] External Input/Output Specifications

(1) Output

1 Operation ON signal

Terminal No. TB8-1, 2

Output Relay contacts output Rated voltage: L1 - N: 220 ~ 240 V

Rated load: 1 A

Operation

2 COMP ON/OFF signal

Connector No. CN51-3, 4 Connector : B5B-XH-A (JST)

Output DC 12 V

Operation DC 12 V is output during compressor operation.

3 Water freeze / trouble signal

Connector No. CN51-3, 5 Connector : B5B-XH-A (JST)

Output DC 12 V

Operation

•

When DIP switch 2-7 is OFF

The relay closes during compressor operation.

•

When DIP switch 2-7 is ON

The relay closes during reception of the cooling or the heating operation signal from the controller.

(Note: It is output even if the thermostat is OFF (when the compressor is stopped).)

•

When DIP switch 3-3 is OFF

If the water temperature (TH 6) drops below 5°C while the unit is stopped, DC 12 V is output.

•

When DIP switch 3-3 is ON

DC 12 V is output when the heat source unit is stopped abnormally.

(2) Input

1 Pump Interlock

Terminal No. TB8-3, 4

Input Level signal

Operation If the circuit between TB8-3 and TB8-4 is open, compressor operation is prohibited.

2 Demand

Connector No. CN3D-1, 3 Connector : B3B-EH (JST)

Input Level signal

Operation If the circuit between CN3D-1 and CN3D-3 is opened, compressor operation is prohibited.

–32–

3 TEST RUN

[1] Before Test Run

(1) Check points before test run

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

Confirm that the resistance between the power source terminal block and the ground exceeds 2MΩ by measuring it with a DC500V 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.

Confirm that the Ball valve at both gas and liquid sides is being fully opened.

Note) Certainly close the cap.

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.

(2) Caution at inverter check

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

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

applied to inverter power portion.

When checking,

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

Allow 10 minutes after shutting off main power source.

Open the MAIN board mounting panel, and check whether voltage of both ends of electrolytic capacitor is

20V or less.

–33–

(3) Check points for test run when mounting options

Built-in optional parts

Mounting of drain water lifting-up mechanism

Mounting of permeable film humidifier

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

Work

Disassembling and assembling of drain water lifting-up mechanism

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

Content of test run

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

After that, connect connector of circuit.

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

Content of test run

Lead wire from control box not damaged.

Rubber cap properly inserted to drain water outlet of drain pan?

Check point

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

No overflow from drain pan.

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.

Check point Result

Insulation pipe

Result

Mounting of float switch

Electric wiring

Insulation pipe of gas and liquid

pipes dealt with as shown in the right figure?

Drain pan and piping cover mounted

without gap?

Drain pan hooked on cut projection

of the mechanism?

Float switch installed without contacting with drain pan?

No mistakes in wiring?

Connectors connected surely and

tightly?

No tension on lead wire when sliding

control box?

No gap

Float switch moves smoothly.

Float switch is mounted on

mounting board straightly without deformation.

Float switch does not contact with

copper pipe.

Wiring procedure is exactly followed.

Connector portion is tightly hooked.

–34–

–35–

(5) Check points for system structure

ex. PQRY-P200YMF-B

Check points from installation work to test run.

Classification

Installation and piping

Power source wiring

Portion

Check item

Instruction for selecting combination of heat source unit, and indoor unit followed? (Maximum number of indoor units which can be connected, connecting model name, and total capacity.)

Follow limitation of refrigerant piping length? For example, 70m or less (total length : 220m) at the farthest.

Connecting piping size of branch piping correct?

Refrigerant piping diameter correct?

Refrigerant leak generated at connection?

Insulation work for piping properly done?

Specified amount of refrigerant replenished?

Pitch and insulation work for drain piping properly done?

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

Proper grounding work done on heat source unit?

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

Trouble

Not operate.

Not cool (at cooling).

Not heat (at heating).

Not cool, not heat, error stop.

Condensation drip in piping.

Not cool, not heat, error stop.

Water leak, condensation drip in drain piping.

Error stop, not operate.

Electric shock.

Error stop, not operate.

L line and N line connected correct?

The some electric pars should be damaged.

–36–

Classification

Portion Check item

Trouble

Transmission line

System set

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

2 1.25mm2 or more transmission line used?

(Remote controller 10m or less 0.75mm

)

3 2-core cable used for transmission line?

4 Transmission line apart from power source line by 5cm

or more?

5 One refrigerant system per transmission line?

The short circuit connector is changed form CN41 to CN40

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

7 No connection trouble in transmission line?

Address setting properly done? (Remote controller,

indoor unit and heat source unit.)

Setting of address No. done when shutting off power

source?

Address numbers not duplicated?

Turned on SW3-8 on indoor unit circuit board when

mounting room thermistor sensor?

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)

Before starting

Refrigerant piping ball valve (Liquid pressure pipe, gas

pressure pipe) opened?

Turn on power source 12 hours before starting opera-

tions?

–37–

Error stop.

Error stop, compressor trouble.

[2] Address setting

(1) Switch operation

In order to constitute CITY MULTI in a complete system, switch operation for setting the unit address No. and connection No. is required.

1 Unit address No. group No. and connection No.

The unit address No. is determined by the address setting switch of the heat source unit, indoor unit and remote controller.

2 Caution for switch operations

Be sure to shut off power source before switch setting. If operated with power source on, switch can not operate properly.

Address switch shall follow decimal system with 2 digits. Set 000 ~ 250

Heat source unit Indoor unit

10 1

No units with identical unit address shall exist in one system. If set erroneously, system can not

operate.

Remotecontroller

10 1

Rotary switch

Connection No. setting

Indoor unit Heat source unit

BC controller Remote controller (Main) Pair remote controller (Sub) MJ-103

Unit address No. setting

01~50 51~99,100 51~99,100 101~150 151~199, 200 000, 201~250

(2) Address setting and switch operations

1 In case of system with a single system (In case higher rank controller such as remote controller for centralized control is not connected)

Unit

Indoor unit

Heat source unit

BC controller

Remote controller (Main)

Remote controller (Sub)

Remote controller

MJ-103

Fresh Master

Address setting

01~50

51~99, 100

101~150

151~199, 200

000, 201~250

1~50

Fixed

100

Example

10 1

The smallest address of indoor unit in same refrigerant

system + 50

*If the address is to be 100, use “50.”

The address of Heat source unit + 1

*If the address is to be 100, use “50.”

The smallest address of indoor unit in the group + 100

*The place of "100" is fixed to "1"

The address of main remote controller + 50

*The address automatically becomes "200" if it is set as

"00"

· The Fresh Master system allows you to select operations using the remote controller or using the indoor

unit. Use the dip switch (SW3-1) to make this selection. See the section “Fresh Master operation/Remote controller switching” for settings.

· For operations using the remote controller, use the same setting method as for the indoor unit.

· For operations using the indoor unit, settings should be within the range 01 – 50, without respect to the group.

Note

Lossnay unit

1~50

10 1

–38–

Set within the range 01 – 50 with no duplications.

2 Branch number switch (Indoor Units and Fresh Master)

Match the indoor unit’s refrigerant pipe with the BC controller’s end connection number. When combining branches, choose the smallest connection number in the series. The indoor unit capacity limit for connecting to a branch is 80. Max. 3sets for 1 connection. When selecting connection number 16, choose 0 as the setting for the branch number switch.

Connecting one unit to one branch

Combining branches

BC controller

1 2 3 4 5 6

3 4 5 6

Above 80

1 2 3 4 5 6

BC controller

1 2 3 4 5 6

Connecting more than one unit to one branch

BC controller

1 2 3 4 5 6

1 1 2 3 4 5 6

Below 80

3 In the case of group operations of indoor units of different refrigerant system

(Including the case of connecting with higher rank controller such as remote controller for centralized controller). Group setting shall be done with remote controller. ( When the centralized remote controller is connected, the setting should be done with the centralized remote controller.) Address setting can be done on each unit freely. Regarding transmission wiring, provide 2-wire jumper system (Centralized system transmission line) to outdoor units to be connected to indoor unit in the same group, and mount short circuit connector on CN41 to CN40 for replacement for one of the outdoor units. (However, when the higher rank controller like that for centralized controller is connected, do not replace the short circuit connector to CN40.)

–39–

(3) Examples of switch settings

System diagram Description

1 Individual operation

Heat source unit

BC controller

TB3

2 Group operation

Heat source unit

TB3

BC controller

Indoor unit

101

Remote controller

Indoor unit Indoor unit Indoor unit

01 02 03

Remote controller

Indoor unit Indoor unit

102

Remote controller

103101

Remote controller (Main)

103

Remote controller

153

Remote controller (Sub)

[Switch settings]

(1) Address switch

Unit

Indoor unit

Remote controller

Heat source unit

BC controller

Range

01~50

101~150

Note 1

51~100

Note 2

51~100

Note 2

Indoor unit setting + 100

Smallest address among indoor units + 50

Heat source unit + 1

Note 1. For remote controllers, it is not necessary to set

digits in the hundreds column.

Note 2. When setting heat source unit address or BC

controller address to 100, set the address setting switch to 50.

Setting

–

(2) Branch number switch

Match the indoor unit’s refrigerant pipe with the BC controller’s end connection number.

[Switch settings]

(1) Address switch

Unit

IC (Main)

IC (Sub)

Remote controller

(Main)

Remote controller

(Sub)

Heat source unit

BC controller

Range

01~50

101~150

Note 1

151~200

Note 1

51~100

Note 2

51~100

Note 2

Smallest address among several indoor units that form a single group.

Address other than the IC (Main) among several indoor units that form a single group. Use numerical order starting after the IC (Main).

Address of IC (Main) within the same group + 100

Address of IC (Main) within the same group +

150

Smallest address among indoor units + 50

Heat source unit + 1

Setting

–40–

Notes 1 and 2 : same as above.

(2) Branch number switch

Same as 1 Individual operation.

System diagram Description

3 System for operating with Fresh Master (Lossnay)

Heat source unit

TB3

BC controller

Indoor unit Indoor unit Indoor unit Fresh Master

01 02 03

[Switch settings]

This is the same as 1 Individual operation.

However, keep the Fresh Master address within the 1

~50 range to avoid duplication with other indoor units.

[Registering with a remote controller]

Registers operation of Fresh Master and indoor units

using the remote controller.

101 102 103

Remote controller

System for operating multiple-refrigerant + Fresh Master (Lossnay)

Change

CN40CN41

Heat source unit

TB7

TB3

BC controller

Indoor unit

Remote controller

Indoor unit Indoor unit Indoor unit

02 03 04

Remote controller

In series with ventilation

103101

Remote controller

Indoor unit

01, 02, 03

← →

Fresh Master

[Switch settings]

Same as 1 Individual operation.

*Remote controllers for groups

using different refrigerants connect

to transfer line of the latest indoor

unit in the group.

[Managing electrical supply connector CN40]

Changes the single electrical supply connector of an

outdoor unit group from CN41 to CN40.

[Registration using a remote controller]

1 Group setting

After power is turned on, this changes indoor units

and network remote controllers to group setting.

Heat source unit

TB3

TB7

BC controller

Fresh Master

Indoor unit Indoor unit Indoor unit

07 06 05

107

Remote controller

In series with ventilation

Remote controller

101 103

← →

Indoor unit

01, 02 03, 04 05, 06

107

2 Operation registration

After power is turned on, this activates operation

registration for Fresh Master and indoor units

using remote controllers.

Indoor unit

← →

Fresh Master

01, 02, 03 04, 05, 06

← →

–41–

System diagram Description

5 PAC-SC30GR connection

Change

Where a group remote controller is connected to a transfer line for indoor units.

CN40CN41

Indoor unit

Indoor unit Indoor unit Indoor unit

104 105

Remote controller

Heat source unit

Electrical supply device

TB7

TB3

BC controller

TB7

TB3

BC controller

201

Connect to one or the other

Indoor unit Indoor unit

01 02 03

101 103

Remote controller

0504 06

Remote controller

In series with ventilation

Remote controller

[Switch settings]

Address switch settings are the same as 1 Individual operation. This turns on the central manager switch (SW2-1) of the outdoor unit.

*Remote controllers for groups using different refrigerants connect to transfer line of the latest indoor unit in the group.

[Managing electrical supply connector CN40]

When a group remote controller (GR) is connected to a transfer line for indoor units, this changes the single electrical supply connector in an outdoor unit group from CN41 to CN 40. When connected to a transfer line for central managers, leave it as is (on CN41). (receiving electrical power from an electrical supply device)

[Registration using a group remote controller]

1 After power is turned on, this changes indoor units

to group setting with a group remote controller

2 This sets the relations between indoor units and

remote controllers using a group remote controller.

Indoor unit

101 103 104 107

← → ← →

← →

Group remote controllers can be connected to both indoor/outdoor unit transfer lines and central manager transfer lines.

Remote controller

01, 02 03 04 05, 06

6 MJ-103 MTR connection

Heat source unit

TB7

TB3

Heat source unit

TB7

TB3

MJ-103MTR

BC controller

Indoor unit Indoor unit

Fresh Master

000

Electrical supply device

01 02 03 04

08 07 06 05

101 103

Remote controller

Indoor unit

107

Remote controller

In series with ventilation

Indoor unit Indoor unit

Remote controller

Indoor unit Indoor unit

[Switch settings]

Address switch settings are the same as 1 Individual operation This turns on the central manager switch (SW2-1) of the outdoor unit.

[Registration using a central controller]

1 Group setting

· After turning on the power, this activates group

setting for indoor units using a central controller.

· This activates settings for indoor units and

remote controllers using a central controller.

Remote controller

101 103

← → ← →

Indoor unit

01, 02 03, 04 05, 06

107

← →

2 Settings for Lossnay and indoor units are made

using a central controller.

Indoor unit

01~07

Fresh Master

← →

–42–

[3] Test Run Method

Operation procedure

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

about two minutes

2 Press

3 Press

5 Press

6 Press

7 Make sure that indoor unit fans operate normally

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

9 Press

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

TEST RUN

Press warm or cold air is blowing out

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

ON/OFF

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

display section.

5: When pressing

controller. However, it is not a malfunction.

6: When pressing

remote controller. However, it is not a malfunction.

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

selection button → Make sure that air is blowing out

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

adjust button → Make sure that air blow is changed

button to cancel test run → Stop operation

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

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

–43–

4 GROUPING REGISTRATION OF INDOOR UNITS WITH REMOTE CONTROLLER

(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

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

FILTER

+ switch displays “CENTRALLY

CONTROLLED”.

Switch to assign indoor unit address

of TEMP

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

FILTER

CHECK

TEST RUN

D Registration switch

FILTER

Registration/ ordinary mode selector switch

Registration switch

Confirmation switch

Delete switch

Registered mode selector switch

Switch to assign interlocked unit address

TEST RUN

This switch is used for group/interlocked registration.

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

CLOCK

ON OFF

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

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

of TIMER SET

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

–44–

(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

Heat source unit 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/heat source 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.)

–45–

(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

Group setting mode

˚C

INDOOR UNIT

ERROR CODE OA UNIT ADDRESS NO

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

–

FILTER

CHECK

TEST RUN

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)

3 Press the

registration switch (D)

Indoor units

Group

• Confirm the indoor unit address No.

• Confirm the connection of the transmission line.

–46–

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.

NOT AVAILABLE

ON OFFCLOCK

–

ON/OFF

1Hr.

˚C

FILTER

CHECK MODE

TEST RUN

FILTER

CHECK

TEST RUN

▲

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, heat source 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

+ 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).

+ switch (A

–47–

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 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

In case group registration with other indoor unit is existing

In case no group registration with other indoor unit is existing

–48–

• Deletion completed

▲

˚C

INDOOR UNIT

ERROR CODE OA UNIT ADDRESS NO

ADDRESS NO

“– –” indicates the deletion completed.

• Deletion completed

▼

˚C

INDOOR UNIT ADDRESS NO

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 heat source 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

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

FILTER

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

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

• Deletion completed

When both indoor

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

(Alternative

display)

unit and interlocked unit addresses are existing

▲

INDOOR UNIT ADDRESS NO

(Alternative

˚C

ERROR CODE OA UNIT ADDRESS NO

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

Deletion of address not existing

˚C

INDOOR UNIT ADDRESS NO

• Deletion completed

˚C

INDOOR UNIT ADDRESS NO

▼

(Alternative

INDOOR UNIT ADDRESS NO

˚C

ERROR CODE OA UNIT ADDRESS NO

display)

ERROR CODE OA UNIT ADDRESS NO

–49–

5 CONTROL

[1] Control of Heat Source Unit

(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

• In case unit is started within 2 hours after turning on power source at low ambient temperature (+5˚C or less), the unit does not start operating for 30 minutes at the maximum.

(3) Bypass, capacity control

• Solenoid valve consists of bypass solenoid valve (SV1, SV2) bypassing between high pressure side and low pressure sider. The following operation will be provided.

1) Bypass solenoid valves SV1 and SV2 (both “open” when turned on)

Item

When starting compressor

After thermost “ON is returned and after 3 minutes restart

When compressor stops in cooling or heating mode

After operation stops

During oil recovery operations

During 20Hz operations, at fall in low pressure

When high pressure rises (Pd)

When high pressure (Pd) rises during 20Hz operations (3 minutes after starting)

When discharge temperature rises (3 minutes after starting)

Compressor

SV1

ON (Open) OFF (Close)

Turned on for 4 minutes

Always turned on

Turned on for 3 minutes

Always turned on.

–

When Pd reaches

27.5kg/cm2G (2.70MPa)

When Pd is under 24kg/cm2G (2.35MPa) and 30 seconds

–

SV2

ON (Open) OFF (Close)

–

Always turned on.

When Ps is 1.5kg/ cm2G (0.15MPa) or less

When Pd reaches

26.5kg/cm2G (2.60MPa)

Turned on when high pressure (Pd) exceeds pressure limit

When temp. exceeds 130˚C

When Ps is 2.5kg/ cm2G (0.25MPa) or more

When Pd is under

23.5kg/cm2G (2.30MPa) and 30 seconds

When high pressure (Pd) is 20kg/cm2G (1.96MPa) or less

When discharge temp. is 115˚C

Bypass solenoid valve (SV1)

Start

(4-minute)

Thermo. OFF

Thermo. ON

(2-minute) (3-minute)

Stop

(4) Frequency control

• Depending on capacity required, capacity control change and frequency change are performed to keep constant evaporation temperature in cooling operations, and high pressure saturation temperature in heating operation.

• Frequency change is perfprmed at the rate of 2Hz/second across 20 ~ 105Hz range.

1) Frequency control starting

• 60Hz is the upper limit for 3 minutes after starting.

• 75Hz is the upper limit within 30 minutes at the first starting compressor after turning on power source.

–50–

2) Pressure limit The upper limit of high pressure (Pd) is set for each frequency. When the limit is exceeded, frequency is reduced every 10 seconds. (Frequency decrease rate (Hz) : 22% of the present value)

<P200YMF-B> <P250YMF-B>

3) Discharge temperature limit Discharge temperature (Td) of compressor is detected during operation. If the upper limit is exceeded, the frequency is reduced. (Change rate : 5% of the present value)

• 30 seconds after starting compressor, control is performed every minute.

• Operation temperature is 130˚C.

4) Periodical frequency control Frequency controll is periodically performed except for the frequency controls at operation start, status change, and protection.

1 Cycle of periodical frequency control

Periodical frequency control is performed every minute after the time specified below has passed.

• 20 sec after starting compressor

• 20 sec after frequency control by discharge temperature or pressure limit

2 Amount of frequency change

The amount of frequency change is controlled corresponding to evaporation temperature and high pressure saturation temperature.

3 Back up of frequency control by bypass valve

During 20Hz operations, frequency is backed up by turning on (opening) bypass valve (SV2).

• Cooling During 20Hz operations 3 minutes after starting compressor, bypass valve is turned on when, Ps is 1.5kg/cm

G (0.15MPa) or less and turned off when Ps is 2.5kg/cm2G (0.25MPa) or more.

• Heating During 20Hz operations 3 minutes after starting compressor, SV2 turned on when high pressure (Pd) exceeds pressure limit and turned off when Pd falls to 20kg/cm

OFF

▼

1.5kg/cm2G 2.5kg/cm2G (0.15MPa) (0.25MPa)

G (1.96MPa) or less.

OFF

▼

20kg/cm2G 27kg/cm2G (1.96MPa) (2.65MPa)

▼

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

• Oil return LEV (SLEV) opening is dependent on compressor frequency and ambient temperature.

• SLEV is closed (0) when compressor stops, and SLEV is set (50) for 10 minutes after starting compressor.

(6) Control of liquid level detecting heater

Detect refrigerant liquid level in accumulator, and heat refrigerant with liquid level heater for judging refrigerant amount. 6 steps of duty control is applied to liquid level heater depending on frequency and outdoor air temperature, 1minute after starting compressor.

–51–

(7) 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 with low pressure saturation temperature Te in accumulator inlet portion, refrigerant liquid level can be judged. Accumulator liquid level is judged in 3 steps as shown in the figure, from low pressure saturation temperature Te 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.

Ps Te (low pressure saturation Temperature)

* 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 refrigerant amount

Cooling

(a)Prohibition of liquid level detection

• Liquid level is detected in normal conditions except for the following: For 6 minutes after starting unit, and during unit stopping.

(b)In case AL=2 and Td-Tc

20 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. 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 (SW2-6), error stop is not observed, and 3 minutes restart prevention by intermittent fault check mode is repeated. However, LED displays overflow. (Turning SW2-6 on makes the error of TH6 < outdoor air sensor > ineffective.)

refrigerant ignore display are extinguished.

Heating

(a)Prohibition of liquid level detection

Liquid level is detected in normal conditions except for the following.

• For 6 minutes after starting unit, and during unit stopping (including restart after overflow ignored).

• During defrosting operations and for 6 minutes after defrosting.

–52–

(b)In case AL=2 and Td-Tc 20 deg 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 prohibition. 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).

(8) Control of heat source unit fan and heat source unit heat exchanger capacity

1) Control system Depending on capacity required, control SV3~6, SV71~73, for maintaining evaporation temperature (0˚C) in cooling operations, and high pressure saturated temperature (52˚C) in heating operations.

2) Heat exchanger pattern

Mode

Cooling-only × ××

SV3 SV4 SV5 SV6 SV71 SV72 SV73

Heat Exchanger Switching

× ×××

×× ××× ××× ××× ××× × × 8 HP only

× ×× ×××10 HP only × ×× × × 10 HP only ×××× ×××

Cooling-main × ××

× ×

×× × ×× ×××8 HP only ×× × ×

××× ××× ××× × ×

×× ×××8 HP only × ×× ×××10 HP only × ×× × × 10 HP only × × ×××10 HP only ×××× ××× ×××× × ××× ×××

Heating-only ×××

××× × ×

×× × × 10 HP only

××

×× ×

×× × ××× ×

Heating-main ×××

×× × × 10 HP only

××

×× ×

×× × ××× ×

Remarks

–53–

[2] Control box cooling system

In PQRY, in order to cool the parts in the control box which emit heat, a refrigerant evaporator has been placed in the bottom of the control box (unit frame side). (See the figure.) The control box is also mounted in the frame and when the inverter operates, it operates the control box internal cooling fan as well as supplying refrigerant to the evaporator, thus creating air passages in the direction shown by the arrows.

(1) Cooling fan control

(a) If the temperature of fin is over 80°C when the inverter is just

turned on, run the fan until the temperature drops below 80°C. During this operation, turning on the inverter is prohibited.

(b) When the inverter is operating Always ON

Note: By mounting the control box in the frame, a structure is

created where air passages are formed, so when mounting the control box, be sure to push it in to the back. Also, at that time, be careful of tearing of the seal material affixed to the frame.

(2) LEV 2 control

(a) LEV2 control range.

LEV 2 150 pulses

(b) LEV2 Control method

SHB=THINV-TH2 THHS

6 SHB

SHB<6

–

THHS 55˚C

THHS<55˚C

TH10

TH10>80

TH10 80

PQRY Control box

Cooling fan

Heat sink

Refrigerant piping

Evaporator

LEV2

(INV Cooling LEV)

TRM

THINV

TH2

PQRY Control Box Layout Diagram

(Internal air passages)

DCL

Frame

LEV2

–

DOWN

–54–

[3] Control of BC Controller

(1) Control of SVA, SVB and SVC

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

Mode

Connection

SVA ON OFF OFF OFF

SVB OFF ON OFF OFF

SVC ON OFF OFF OFF

(2) Control of SVM

SVM is turned on and off corresponding to operation mode.

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

SVM ON OFF OFF OFF OFF

(3) Control of LEV

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

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

Cooling Heating Stop Defrost

LEV1

LEV3

Superheat

control

Differential

pressure control

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

the BC controller unit.

–

2000

Superheat

control *1

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

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

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

Differential

Pressure control

• Liquid level control *3

• Differential pressure control

Differential

pressure control

1000

–55–

[4] Operation Flow Chart

(1) Heat source unit

Start

“HO” blinks on the remote

controller

Oil return LEV (SLEV), INV

cooling LEV (LEV2) fully closed

1. 52C OFF

2. Inverter output 0Hz

3. All solenoid valve OFF

Fan

Breaker

turned on

YES

Set indoor ad-

dress No. to remote

controller

YES

Operation command

YES

Operation

mode

Error mode

Normal operations Trouble observed Stop

Note : 1

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

Note : 2

YES

Error stop

52C ON

Note : 3

Operation

mode

Cooling (Cooling-

only) operations

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

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

Note : 3 On PUHY system, operation mode conforms to mode command by indoor unit. However, when heat source unit is being under

Note : 4 In case BC controller issues cooling/heating mixed operation mode, heat source unit decides operation mode of cooling-main

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

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

cooling operation, the operation of indoor unit will be prohibited even by setting a part of indoor units under operation, or indoor unit under stopping or fan mode to heating mode. Reversely when heat source unit is being heating operation, the same condition will be commenced. On PURY system, operation mode conforms to mode command by BC controller.

operation or heating-main operation.

Heating (Heating-

only) operations

Operation mode command to (BC controller) heat source unit

Cooling/heating mixed

Note : 4

Operation

mode

Cooling-main

operations

Heating-main

operations

Error code blinks on the

outdoor controller board

Error command to

BC controller

Error code blinks on the

remote controller

–56–

(2) BC controller

Start

Breaker

turned on

YES

Operation

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

2. Transmission to heat source unit

Receiving operation mode

command from heat source unit

command

YES

Error mode

Note : 1

YES

Normal operations Trouble observed Stop

Fan

Solenoid valve OFF,

LEV fully closed.

Cooling-only

operations

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

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

Operation mode

Heating-only

operations

Cooling/heating mixed

Operation mode

Cooling-main

operations

Heating-main

operations

Error stop

Error code blinks on the outdoor controller board

Error command to

BC controller

Error code blinks on the

remote controller

–57–

(3) Indoor unit

Start

Breaker

turned on

YES

Normal operations Trouble observed Stop

YES

3-minute drain

pupm ON

Operation SW

turned on

1. Protection function self-holding cancelled.

2. Indoor unit LEV fully closed.

Remove controller display extinguished

FAN stop

Drain pump

YES

Note :1

Note :2

Error mode

YES

Error stop

Error code blinks on the remote controller

Error command to heat source unit

Indoor unit LEV fully closed

Note :1

Error code blinks on the heat source controller board

Cooling mode

Cooling

display

Prohibition Prohibition

Heating

mode

Heating

display

YES

Cooling operations

Heating operations

Operation mode

YES

Dry operation

Prohibition “Remote controller blinking”

Dry mode

Dry display

Cooling/heating automatic mode

Cooling/heating automatic display

Note :3Note :3 Note :3

YES

Cooling/heating automatic operations

Prohibition Prohibition

Fan mode

Fan display

YES

Fan operations

Note : 1 Indoor unit LEV fully closed : Opening 60

Note : 2 Two error modes include indoor unit trouble, (BC controller trouble) and heat source unit side trouble. In the case of indoor

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

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

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

–58–

(4) Cooling operation

Cooling operation

YES

4-way valve OFF

Indoor unit fan

operations

Test run start

Thermostat ON

YES

3-minute

restart

prevention

Normal operations Test run Stop

YES

1. Inverter output 0Hz

2. Indoor unit LEV, oil return LEV (SLEV), INV cooling LEV (LEV2) fully closed

3. Solenoid valve OFF

4. BC controller solenoid valve OFF

5. BC controller LEV fully closed

1. Inverter frequency control

2. Indoor unit LEV, oil return LEV (SLEV), INV cooling LEV (LEV2) control

3. Solenoid valve control

4. BC controller solenoid valve control

5. BC controller LEV control

–59–

(5) Heating operation

Heating operation

4-way valve ON

Thermostat ON

YES

Test run start

YES

3-minute

restart

prevention

Normal operations Stop Test run

YES

1. Indoor unit fan very low speed operations

2. Inverter output 0Hz

3. Indoor unit LEV, oil return LEV (SLEV), INV cooling LEV (LEV2) fully closed

4. Solenoid valve OFF

5. BC controller solenoid valve OFF

6. BC controller LEV fully closed

1. Indoor and heat source unit fan control

2. Inverter frequency control

3. Indoor unit LEV, oil return LEV (SLEV), INV cooling LEV (LEV2) control

4. Solenoid valve control

5. BC controller solenoid valve control

6. BC controller LEV control

–60–

(6) Dry operation

Dry operations

4-way valve OFF

Normal operations Thermostat ON Stop

1. Indoor unit fan stop

2. Inverter output 0Hz

3. Indoor unit LEV, oil return LEV (SLEV), INV Cooling LEV (LEV2) closed

4. Solenoid valve OFF

5. BC controller solenoid valve OFF

6. BC controller LEV fully closed

Test run start

Inlet temp. 18˚C

YES

1. Heat source unit (Compressor) intermittent operations

2. Indoor unit fan intermittent operations

YES

(Synchronized with compressor : low speed, OFF operations)

YES

Note : 1

Note : 2

Thermostat ON

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

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

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

than normal operations.

–61–

[5] List of Major Component Functions

Name Symbol (function) Application Specification Check method

Compressor

High pressure sensor

Low pressure sensor

Pressure switch

Thermistor

63HS

63LS

63H

TH1 (discharge)

Adjust refrigerant circulation by controlling operating frequency and capacity control valve with operating pressure.

1) High press. detection.

2) Frequency control and high pressure protection

1) Detects low pressure

2) Calculates the refrigerant circulation configuration.

3) Protects the low pressure

1) High pressure detection

2) High pressure protection

1) Discharge temperature detection

2) High pressure protection

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

Low pressure shell scroll type with capacity control mechanism Winding resistance: Each phase 0.388Ω (20˚C)

Pressure

Connector

63HS

63LS

0~30 kg/cm (0~2.94MPa) Vout 0.5~3.5 V

Gnd (black) Vout (white) Vc (DC5V) (red)

Pressure 0~10 kg/cm (0~0.98MPa) Vout 0.5~3.5 V

Gnd (black) Vout (white) Vc (DC5V) (red)

Setting 30kg/cm2G (2.94MPa) OFF

R120=7.465kΩ B25/120=4057

Rt = 7.465exp {4057( - )}

273+t

273+120

Continuity check

Resistance value check

Heat source unit

TH2 (low pressure saturation temperature)

TH3 TH4 (liquid level detection)

TH6 (Inlet water air temperature)

TH9

THINV

1) Detects the saturated vapor temperature.

2) Calculates the refrigerant circulation configuration.

3) Controls the compressor frequency.

4) Controls the valves for heat exchanger capacity control.

Detection of refrigerant liquid level inside accumulator by temperature difference of TH2, TH3 and TH4

1) Inlet water temperature detection

2) Liquid level heater, and opening setting for oil return

1) Detects the CS circuit fluid temperature.

2) Calculates the refrigerant circulation configuration.

1) Detects the temperature at the inverter cooler’s heat exchanger outlet.

2) Controls the LEV2 opening angle.

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

273+t

273+0

-20˚C : 92kΩ

-10˚C : 55kΩ 0˚C : 33kΩ 10˚C : 20kΩ 20˚C : 13kΩ 30˚C : 8.2kΩ

R0=15kΩ B0/100=3460 Rt = 15exp{3460( - )}

273+t

273+0

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

Resistance value check

–62–

Name Symbol (function) Application Specification Check method

Thermistor

Solenoid

Heat source unit

valve

TH10

THHS

SV1 (discharge suction bypass)

SV2 (discharge suction bypass)

1) Detects the compressor shell temperature.

2) Provides compressor shell overheating protection.

1) Detects the inverter cooling fin temperature.

2) Provides inverter overheating protection.

3) Controls the control box cooling fan.

1) High/low press. bypass at starting/ stopping and capacity control at low load

2) Discharge press. rise suppression

Capacity control and high press. rise suppression (backup for frequency control)

R120=7.465kΩ B25/120=4057 Rt =

7.465exp {4057( - )}

273+t

273+120

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

R50=17kΩ B25/50=4170 Rt = 17exp{4170( - )}

273+t

273+50

-20˚C : 605.0kΩ 50˚C : 17.0kΩ

-10˚C : 323.3kΩ 60˚C : 11.5kΩ 0˚C : 180.9kΩ 70˚C : 8.0kΩ 10˚C : 105.4kΩ 80˚C : 5.7kΩ 20˚C : 63.8kΩ 90˚C : 4.1kΩ 30˚C : 39.9kΩ 100˚C : 3.0kΩ 40˚C : 25.7kΩ

AC 220~240V Open at energizing and close at deenergizing

• Continuity check by tester

• Temperature of inlet and outlet.

Linear expansion valve

Liquid level detection heater

Linear expansion valve

Thermistor

Indoor unit

SV3 ~ 6 SV71~73

SLEV

LEV2

CH2, CH3 (accumulator liquid level detection)

LEV

TH21 (inlet air temperature)

TH22 (piping temperature)

TH23 (gas side piping temperature)

Control of heat exchanger capacity.

Adjustment of liquid refrigerant (oil) return foam accumulator

Controls the volume of refrigerant flowing to the inverter cooler’s heat exchanger.

Heating of refrigerant in accumulator liquid level detection circuit

1) Adjust superheat of heat source unit heat exchanger outlet at cooling.

2) Adjust subcool of indoor unit heat exchanger at heating.

Indoor unit control (thermostat)

1) Indoor unit control (freeze prevention, hot adjust, etc.)

2) LEV control in heating operation (Subcool detection)

LEV control in cooling operation (Superheat detector)

DC12V stepping motor drive Valve opening 0~450 pulse (SLEV), 0~150 pulse (LEV2)

Cord heater : 2kΩ

(1kΩ + 1kΩ) AC220~240V 20W (10W + 10W)

DC12V Opening of stepping motor driving valve 60~2,000 pulses

R0 = 15kΩ B0/100 = 3460

Rt = 15exp {3460 ( - )}

273+t

273+0

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

Resistance value check

Continuity check with tester for white-redorange yellow-brown-blue

Resistance value check

–63–

Name Symbol (function) Application Specification Check method

Pressure sensor

Thermistor

BC controller

Solenoid valve

PS1

PS3

TH11 (liquid inlet temperature)

TH12 (bypass outlet pressure)

TH15 (bypass outlet temperature)

TH16 (bypass inlet temperature)

SVM

SVA

SVB

1) Liquid pressure (high-pressure) detection

2) LEV control

1) Intermediate pressure detection

2) LEV control

LEV control (liquid refrigerant control)

LEV control (superheat control)

LEV control (subcool control)

Opens for cooling-only, defrosting.

Supplies refrigerant to cooling indoor unit.

Supplies refrigerant to heating indoor unit.

Connector

PS1/PS3

Pressure 0~30 kg/cm (0~2.94MPa) Vout 0.5~3.5 V

Gnd (black) Vout (white) Vc (DC5V) (red)

R0=15kΩ B0/100=3460 Rt = 15exp{3460( - )}

273+t

273+0

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

AC 220~240V Open when energized Closed when de-energized

Continuity check by a tester

Electronic expansion valve

SVC

LEV1

LEV3

Supplies refrigerant to cooling indoor unit.

Liquid level control Pressure control

12V DC stepping motor drive 0 to 2000 valve opening pulse

Same as LEV of indoor unit.

–64–

[6] Resistance of Temperature Sensor

Thermistor for low temperature Thermistor R Rt = 15exp {3460 ( - )} Rt = 7.465exp {4057 ( - )}

o= 15kΩ ± 3% (TH3 ~ 9, THINV) Thermistor R120 = 7.465kΩ ± 2% (TH1, 10)

273+t

273+0

273+t

273+120

Resistance (kΩ)

–20 –10 10 20 30 40 500

Resistance (kΩ)

90 100 110 120

Temperature (˚C) Temperature (˚C)

Thermistor Ro = 33kΩ ± 1% (TH2) Thermistor R50 = 17kΩ ± 2% (THHS) Rt = 33exp {3965 ( - )} Rt = 17exp {4170 ( - )}

273+t

273+0

273+t

273+50

Resistance (kΩ)

Temperature (˚C) Temperature (˚C)

–65–

6 REFRIGERANT AMOUNT ADJUSTMENT

Clarify relationship between the refrigerant amount and operating characteristics of CITY MULTI, and perform service activities such as decision and adjustment of refrigerant amount on the market.

[1] Refrigerant Amount and Operating Characteristics

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

During cooling operations, required refrigerant amount tends to increase (refrigerant in accumulator decreases)

in proportion to increase in the number of operating indoor units. However, the change of increase rate is small.

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

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

filled with refrigerant.

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

Tendency of

discharge temperature

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

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

Comparison including control system

Compressor shell temperature is 20~70 degrees higher than low pressure saturation temperature (Te) when refrigerant amount is appropriate.

→ Judged as over replenishment when temperature difference from low pressure saturation temperature (Te) is 10 degrees or less.

[2] Adjustment and Judgement of Refrigerant Amount

(1) Symptom

The symptoms shown in the table below are the signs of excess or lack of refrigerant amount. Be sure to adjust refrigerant amount in refrigerant amount adjustment mode, by checking operation status, judging refrigerant amount, and performing selfdiagnosis with LED, for overall judgement of excess or lack of refrigerant amount.

Emergency stop at 1500 remote controller display (excessive

refrigerant replenishment)

Operating frequency does not fully increase, thus resulting in

insufficient capacity

Emergency stop at 1102 remote controller display (discharge

temperature trouble)

Emergency stop occurs when the remote control display is at

1501. (insufficient refrigerant)

Excessive refrigerant replenishment

Insufficient refrigerant replenishment

Insufficient refrigerant

–66–

(2) Refrigerant amount

1 Checking the operating condition

Operate all the indoor units on cooling or on heating, checking the discharge temperature, sub-cooling (BC controller), low pressure saturation temperature, inlet temperature, shell bottom temperature, liquid level, liquid step, etc. and rendering an overall judgment.

Note :

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

Condition

Judgement

1 Outlet temperature is high. (110°C or higher)

2 Low pressure saturation temperature is extremely low.

3 Inlet superheating is high (if normal, SH = 20 deg or lower).

Refrigerant volume tends toward insufficient.

4 Shell bottom temperature is high (the difference with the low pressure saturation

temperature is 70 deg. or greater)

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

perature is 10 deg. or lower).

Rifrigerant volume tends toward overcharge.

6 Liquid level AL = 2

2 Cautions when judging the liquid level

If you are judging the liquid level, be sure to use it only after making sure the liquid level sensor function (sensor and heater) is operating normally.

Check Items 1 Liquid Heater Disconnection Check 2 Liquid Heater Output Check

Turn 1 ON on the self-diagnosis switch (SW1)

1234 567 8910

, and output the

Normal if the resistance is 2 kΩ ± 5%. Normal if AC 198~264 V is output together with the LED lighting.

Judgment

signal for the heater relay to LED 7, then check the voltage of the heater terminal (AC 198~264 V) (leave the heater connections as they are).

3 Inlet superheating is high (if normal, SH = 20 deg or lower).

–67–

3 Check the refrigerant volume by self-diagnosis using the LED.

Set the self-diagnosis switch (SW1) as shown below and check the past information (history) concerning the refrigerant volume.

1234 567 8910

Set SW1 as shown in he figure at right.

If LD8 lights up, it indicates the refrigerant charge abnormal delay state just before emergency stop due to refrigerant overcharge (1500).

4 Additional refrigerant charge volume

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

Heat source unit model name PQRY-P200YMF-B PQRY-P250YMF-B Refrigerant charge volume 7.5kg 8.5 kg

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

Additional refrigerant volume (kg) = (0.12 × L

1) + (0.06 × L2) + (0.024 × L3) + α

1: Length of ø12.7 liquid pipe (m)

L2: Length of ø9.52 liquid pipe (m) L

3: Length of ø6.35 liquid pipe (m)

α: refer to the calculation table.

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

(α Calculation Table)

Total capacity of Connected indoor units α P200 P250

100~160 125~160 1.5 161~300 161~375 2.0

Caution :

When charging with refrigerant, be sure to charge from the liquid side. If charging from the gas side, it will cause the refrigerant composition to change inside the unit and the composition of the refrigerant remaining in the canister will also change.

–68–

(3) Refrigerant amount adjustment mode operations

1) Procedure Follow the procedure shown below when needs to additionally replenish or discharge refrigerant arises depending on operation status.

When turning on function select switch (SW2-4) on heat source unit control circuit board, mode is changed to refrigerant amount adjustment mode followed by the operations shown in the table below.

During cooling-only operations only, LEV3 of BC controller is set at fixed opening, with heat

source unit heat exchanger fully operated (SV3-5, SV71 open, SV6, SV72, SV73 close).

Operations

During heating-only operations (or cooling/heating mixed operations), normal operation is

observed.

In addition when setting selfdiagnosis switch (SW1) on control circuit board of heat source unit to

1ON2345678910

liquid level of accumulator is shown by position of LED light-up.

When LED1 lights up → AL = 0 (No liquid in accumulator) When LED2 lights up → AL = 1 (Liquid in accumulator) When LED3 lights up → AL = 2 (Overcharge)

Note 1: Though AL=1 is shown for a while after starting operations in refrigerant amount adjustment mode, it some-

times changes to AL=0 as time goes by (when refrigerant system becomes stable).

1 In the case of genuine AL=1

In case AL=1, subcool of BC controller is 5 degrees or more, and SH of all indoor units are within 5-9 degrees.

2 In case the present AL=1 status will possibly change to AL=0

In case subcool of BC controller is 5 degrees or less, or SH of at least one indoor units 5 degrees or less.

2: Refrigerant amount adjustment in cooling mode can not be performed when high pressure is 14kg/cm

(1.37MPa) or more. In this case, perform the adjustment in heating mode.

Countermeasure

In the case of cooling-only operations in refrigerant amount adjustment mode, if the above 2 is applicable, judge accumulator level (AL) after subcool of BC controller reaches 5 deg or

more, and SH of all indoor units becomes 5~7 degrees.

Monitor subcool of BC controller at LED light-up position, by turning on selfdiagnosis switch

of heat source unit (SW1-1, 2, 4, 8)

Monitor SH of indoor unit at LED light-up position, by turning on No. 1 unit SW1 -5, 6, 8 No. 2 unit SW1 -1, 5, 6, 7 and No. 3 unit SW1 -2, 5, 6, 8 No. 4 Unit SW1 -1, 2, 5, 6, 8

No. 5 unit SW1 -3, 5, 6, 8 No. 6 unit SW1 -1, 3, 5, 6, 8, No. 7 unit SW1 -1, 2, 3, 5, 6, 8, No. 8 unit SW1 -4, 5, 6, 8 No. 9 unit SW1 -1, 4, 5, 6, 8, No. 10 unit SW1 -2, 4, 5, 6, and 8.

–69–

2) Refrigerant adjustment in cooling season 1 Flow chart

Adjustment start

Cooling operations of all indoor units in test run mode.

After compressor start, turn on refrigerant amount adjustment switch (SW2-4) of heat source unit.

Operations status

stabilized?

Liquid level of accumulator

indicates AL=0?

Charge refrigerant from low pressure service port little by little.

10 minutes or more past after refrigerant charge.

YES

* Valid for only 2 hours in the test run mode. All work must therefore be carried out

within 2 hours. Select the test run mode again if more than 2 hours is required.

* The coolant volume adjustment mode extends for 2 hours after SW2-4 is set to ON.

All work must therefore be carried out within 2 hours. Switch SW2-4 OFF → ON if more than 2 hours is required.

Recover refrigerant little by little from low pressure service port.

Liquid level changed from

AL=1 to AL=0?

Liquid level changed from

AL=0 to AL=1?

Finish refrigerant.

Calculate adjustment (Wkg) as shown in separate table.

Parameter: frequency, low pressure, piping length, heat source unit capacity

Adjustment (W) minus?

Recover adjustment to refrigerant from High pressure Ball valve (BV2) service port by setting refrigerant recovering time as a standard.

Turn off refrigerant amount adjustment

switch (SW2-4)

Finish refrigerant recover.

Replenish ajustment of refrigerant from low pressure service port.

Adjustment finished.

–70–

2 Additional replenishment amount and discharge amount of refrigerant

Table-1 PQRY-P250YMF-B (In case total capacity code is 40 or more and displayed compressor frequency is 97Hz or less)

Compressor frequency (Hz) 63~69 70~76 77~83 84~98

Adjustment W(kg) +9 +8 +7 +6

Table-2 PQRY-P250YMF-B (In case total capacity code is 40 or more and displayed compressor frequency is 98Hz)

Low pressure (kg/cm2G) (MPa)

3.8~4.5 4.5~5.0 5.0~5.5 5.5 or more

(0.37~0.44) (0.44~0.49) (0.49~0.54) (0.54)

Adjustment W(kg) +6 +5 +4 +3

Table-3 PQRY-P250YMF-B (In case total capacity code is 40 or less and displayed frequency is 97Hz or less)

Compressor

frequency (Hz)

Extended piping length (m) (Ø19.05)

10m or less

10~50m

50m or more

42~48 49~55 56~62 63~69 70~76 77~83 84~97

+4 +4

+13 +11 +9 +7 +5

+3 +2

+3 0

Table-4 PQRY-P250YMF-B (In case total capacity code is 40 or less and displayed compressor frequency is 95Hz)

Low pressure

(kg/cm2G) (MPa)

Extended piping length (m) (Ø19.05)

10m or less

10~50m

3.8~4.5 4.5 or more

(0.37~0.44) (0.44)

+4 +4

+1 +1

50m or more

–5 –7

Table-5 PQRY-P200YMF-B (In case total capacity code is 40 or more and displayed compressor frequency is 74Hz or less)

Compressor frequency (Hz) 55~60 61~66 67~74

Adjustment W(kg) +13 +11 +9

Table-6 PQRY-P200YMF-B (In case total capacity code is 40 or more and displayed compressor frequency is 75Hz or more)

Low pressure (kg/cm2G) (MPa)

3.8~4.5 4.5~5.0 5.0~5.5 5.5~6.0 6.0 or more

(0.37~0.44) (0.44~0.49) (0.49~0.54) (0.54~0.59) (0.59)

Adjustment W(kg) +7 +5 +3 +2 +1

Table-7 PQRY-P200YMF-B (In case total capacity code is 40 or less and displayed compressor frequency is 74Hz or less)

Compressor frequency (Hz) 39~43 44~49 50~54 55~60 61~66 67~74

Adjustment W(kg) +13 +12 +11 +10 +9 +8

Table-8 PQRY-P200YMF-B (In case total capacity code is 40 or less and displayed compressor frequency is 75Hz)

Low pressure (kg/cm2G) (MPa)

3.8~4.5 4.5~5.0 5.0~5.5 5.5 or more

(0.37~0.44) (0.44~0.49) (0.49~0.54) (0.54)

Adjustment W(kg) +6 +5 +3 +2

Note: Check displayed frequency with LED by setting selfdiagnosis switch (SW1) to

–71–

1ON2345678910

3 Time required for recovering refrigerant from low pressure service port (minute)

Low pressure

(kg/cm

Refrigerant amount

G) (MPa)

3.5~4.5 4.5~5.5 5.5 ~ 7.5

(0.34~0.44) (0.44~0.54) (0.54~0.74)

to be drawn out (kg)

1 4.0 3.5 3.5

2 8.0 7.0 6.5

3 12.0 10.5 10.0

4 16.0 14.0 13.0

5 20.0 18.0 16.5

6 24.0 21.5 19.5

7 28.0 25.0 23.0

8 32.0 28.5 26.0

9 36.0 32.0 29.5

10 40.0 35.5 32.5

11 44.0 39.0 36.0

4 Additional evacuation, refrigerant replacement, and refrigerant replacement

WR2 series has unique refrigerant circuit structure which makes possible 2-pipe cooling-heating simultaneous operations. Therefore, in the case of total replacement or replenishment of refrigerant in this system, the following evacuation and refrigerant replenishment procedures are required. 1 Perform evacuation by connecting to system analyzer joint of service port of high pressure ball valve and high

pressure charge plug, and joint of service port of low pressure ball valve and low pressure charge plug.

2 Perform refrigerant charge from low pressure circuit only, after finishing evacuation, closing vacuum pump valve,

shutting off high pressure circuit of system analyzer, and opening valve of refrigerant cylinder. (In case service port of ball valve and charge plug can not be jointed as shown in the figure, use two vacuum pumps and evacuate high pressure side and low pressure side circuits separately.)

Note 1: Though refrigerant gas itself is harmless, airtight room should be opened before gas release for preventing

oxygen shortage.

2: When releasing gas, use blotting paper, etc. so that oil spouted with the gas does not spread out.

A Ball valve of the high pressure side B Service port C Ball valve of the low pressure side D Charge plug E High pressure F Low pressure G Evacuation H Evacuation I Replenish of refrigerant J System analyzer K Lo knob L Hi knob

P-YMF-B

N Valve O Valve P Flon 22 cylinder Q R407C cylinder R Scale S Vacuum pump

P-YMF-B : Use a vacuum pump with a reverse flow

check valve

T A high-precision gravimeter measurable up to 0.1kg

should be used. If you are unable to prepare such a high-precision gravimeter, you may use a charge cylinder.

M 3-way joint

–72–

3) Refrigerant adjustment in heating season

1 Flow chart

Adjustment start

Heating operations of all indoor units in test run mode.

Note 1

After compressor start, turn on refrigerant amount adjustment switch (SW2-4) of heat source unit multi board.

Note 2

Operations stabilized?

Liquid level of

accumulator indicates

AL=0?

Note 3

Note 5

Charge refrigerant little by little from low pressure service port.

10 minutes or more past after refrigerant charge.

YES

* Valid for only 2 hours in the test run mode. All work must therefore be carried out within 2

hours. Select the test run mode again if more than 2 hours is required.

* The coolant volume adjustment mode extends for 2 hours after SW2-4 is set to ON. All work

must therefore be carried out within 2 hours. Switch SW2-4 OFF → ON if more than 2 hours is required.

Liquid level of

Note 3

accumulator indicates

AL=1?

Refrigerant

insufficient for one

unit operations?

Charge refrigerant little by little from low pressure service port.

Note 4

Note 5

Adjustment not

required.

Note 5

Recover refrigerant little by little from low pressure Ball valve (BV1) service port.

Liquid level of

accumulator indicates

AL=0?

Finish refrigerant.

Note 6

Calculate difference (W) between refrigerant amounts required for heating and cooling, and replenish the calculated refrigerant amount.

Turn off refrigerant amount adjustment switch (SW2-4), and perform normal operations for about 15-minute.

Turn on No. 7 selfdiagnosis switch (SW1) so as to be in LED liquid level display mode.

Liquid level of

accumulator indicates

AL=1?

Liquid level

changed from AL=1

to AL=0?

Finish refrigerant.

Liquid level

changed from AL=1

to AL=0?

Suspend refrigerant purge.

Note 8

Recover about 2kg refrigerant by setting refrigerant recover time as a standard.

Turn off refrigerant amount adjustment switch (SW2-4).

Adjustment

finished

Turn off all SW1

Adjustment finished

Re-adjustment

–73–

Note :

1. Be sure to operate all indoor units because refrigerant is accumulated in stopped unit. Change mode to test run

mode for preventing stabilized operations from being disturbed by turning thermostat.

2. • Judge operation status as “stable” when high pressure is stabilized.

• Judge “stable” or “unstable” 3 minutes after starting compressor.

3. When turning on SW1 to

1234 567 8910

, LED displays liquid level as follows.

When LED 1 lights up → AL=0

When LED 2 lights up → AL=1

When LED 3 lights up → AL=2

4. In the case of AL=1, adjustment is not required in principle. However, if liquid level is on the lower side, adjustment

is required for fear of refrigerant shortage because refrigerant is accumulated in stopped unit at the time on oneunit operations.

5. Calculate difference of required refrigerant amounts between cooling and heating operations.

1 In case refrigerant piping length is roughly known

Replenish refrigerant observing the table below. The total. length is that converted to ø19.05 liquid pipe size.

High pressure

G) (MPa)

(kg/cm

Piping length (m)

15 or less 15~17 17 or more

(1.47)

(1.47~1.67)

(1.67)

60m or less 10kg 5kg 2kg

60~90m 11kg 6kg 3kg

90m or more 12kg 7kg 4kg

Liquid pipe size ø12.7 → Actual length × 0.75 Liquid pipe size ø9.52 → Actual length × 0.375 Liquid pipe size ø6.35 → Actual length × 0.15

2 In case refrigerant piping length is not known

Additionally charge 10kg refrigerant.

1234 567 8910

6. When turning on SW, LED shows liquid level displayed mode.

When LED 1 lights up → AL=0

When LED 2 lights up → AL=1

When LED 3 lights up → AL=2

7. When 7~B adjustments has been done without fail, AL=2 is not indicated even though maximum amount of

refrigerant is charged at C. Therefore, when AL=2 is displayed, excessive replenishment at 7 and 9, or calculation mistaken in C are judged as the cause.

–74–

7 TROUBLESHOOTING

[1] Principal Parts

Pressure sensor

(1) Judging failure

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

1234 56 78910

High pressure

Low pressure

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

(a) If the gauge pressure is 0~1 kg/cm (b) If the pressure according to the LD1 display is 0~1 kg/cm

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

1234 56 78910

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

G (0.098MPa), there is faulty contact at the connec-

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

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

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

G (0.098MPa), both the affected pressure sensor

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

G (0.098MPa), the affected pressure sensor is

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

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

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

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

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

higher, the MAIN board is faulty.

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

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

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

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

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

High pressure 0.1 V per 1 kg/cm

G (0.098MPa)

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

–75–

Connector

63HS/

63LS

Vout 0.5~3.5 V

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

* Connector connection specifications on the pressure sensor body side.

The connector’s pin numbers on the pressure sensor body side differ from the pin numbers on the main circuit board side.

Sensor body side MAIN board side

Vcc Pin 1 Pin 3

Vout Pin 2 Pin 2

GND Pin 3 Pin 1

Solenoid valve (SV1~6, SV71~73)

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

SW1

1234 56 78910

12345678

SV6SV5

LED

SV4SV3SV2SV1

SV73SV72SV71

1) In the case of SV1 (Bypass Valve) (a) When the compressor starts, SV1 is ON for 4 minutes, so check operation by whether the solenoid valve is

emitting an operating noise.

(b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the

bypass circuit and the sound of the refrigerant.

2) In the case of SV2 (Bypass) (a) SV2 goes ON in accordance with the rise in the high pressure in the cooling mode and heating mode, so check

its operation by the LED display and the operating noise emitted by the solenoid valve. (Conditions during operation: See Control of Heat Source Unit.)

(b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the

bypass circuit and the sound of the refrigerant.

3) SV3~6, SV71~73 (Control of heat exchanger capacity) (a) Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of

SV3~5, SV71 are turned on depending on conditions during cooling-only operations.

(b) Operation can be confirmed by LED display and operating sound of solenoid valve, because all of SV3~5, SV73

are turned on during heating-only operations.

SV3~6, SV71~73 are turned on depending on conditions during cooling-principal and heating-principal operations.

–76–

(d) The refrigerant flow is as following figure. Hot gas (high pressured) flows in cooling mode and cool gas/liquid

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

Solenoid Valves Block

SV3

SV4

➁➂➃➄➅

HEXA

HEXB HEXC HEXD HEXE

➀

Distributor

SV5

CV9CV8

SV6

CV10

SV71

CV4

CV5

CV6

Orifice

CV7

CV2

CV3

* Closed torque : 13kg·m (1.3N·m)

–77–

LEV for heat source unit

The valve opening angle changes in proportion to the number of pulses. (Connections between the heat source unit’s MAIN board and SLEV, LEV2)

Pulse signal output and valve operation

Output (phase)

Output states

1234567 8

ø1 ON OFF OFF OFF OFF OFF ON ON

ø2 ON ON ON OFF OFF OFF OFF OFF

ø3 OFF OFF ON ON ON OFF OFF OFF

ø4 OFF OFF OFF OFF ON ON ON OFF

LEV valve closing and valve opening operations

Valve Closing

Valve Opening

Valve Opening Angle (Flow Rate)

Fully Open 480 pulses

Output pulses change in the following orders when the

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

*1. When the LEV opening angle does not change, all the

output phases are off.

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

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

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

* When the valve operates smoothly, there is no sound

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

* Whether a sound is being emitted or not can be

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

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

may become lower.

Pulse Count

–78–

LEV for BC controller and indoor unit

1 LEV receives pulse signal from microcomputer, and operates valve with stepping motor. 2 Valve opening changes in proportion to the number of pulses.

Connection of microcomputer circuit board and LEV

Intermediate connector (mounted on outdoor unit only)

Brown

Red

Blue

Orange

Yellow

White

Connector In the case of indoor board : CN60 In the case of multi board : CNLV

Microcomputer circuit boad

Operarion circuit

Note: Pay attention to colors of lead wires because numbers of intermediate connectors are different from those of circuit board side connectors.

Pulse signal output and valve operations

Output (phase)

No.

ø1

ø2

ø3

ø4

OFF ON ON OFF

OFF OFF ON ON

Output states

123 4

ON OFF OFF ON

ON ON OFF OFF

Closing and opening operations of valve

Valve opening (Flow rate)

Full opening (2000 pulses)

1 Valve open : Output pulse changes in order of 1→2→3→4→1. Valve close : Output pulse changes in order of 4→3→2→1→4. 2 All output phases are turned OFF when LEV opening does not

change.

3 In case output phase is lacking or kept “ON,” motor can not rotate

smoothly, generating ticking sound and vibration.

1 When turning on power source, issue valve closing signal of 2,200

pulses, so that valve opening is located at point A.

2 When valve runs smoothly, no sound or vibration is generated from

LEV. However, big sound is observed when valve opening changes from point E to A or valve is locked.

(Sound generation can be identified from the bundle of screwdriver

attached to the valve.)

Additional tightening zone

(870 ~ 100 pulses)

Number of pulse(SJ)

–79–

Judgment methods and likely failure mode

Caution:

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

Failure Mode Judgment Method Treatment Affected LEV

Microcomputer driver circuit failure

1 Disconnect the control board connector and connect

the check LED as shown in the figure below.

Indoor, BC controller

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

Heat source

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

Indoor

BC controller

Heat source

LEV mechanism is locked.

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

Fully closed failure (valve leaks)

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

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

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

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

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

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

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

Thermistor liquid pipe (temperature sensor)

Linear Expansion Valve

minimal leakage, it is not necessary to replace the LEV if there are no other effects.

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

Replace the LEV.

Replace the LEV coils.

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

Indoor

BC controller

Heat source

Indoor

BC controller

Heat source

Indoor

BC controller

Faulty wire connections in the connector or faulty contact.

1 Check for pins not fully inserted on the connector and

check the colors of the lead wires visually.

2 Disconnect the control board’s connector and conduct

a continuity check using a tester.

–80–

Check the continuity at the places where trouble is found.

Indoor

BC controller

Heat source

Heat source LEV (SLEV) coil removal procedure (configuration) As shown in the figure, the heat source LEV is made in such a way that the coils and the body can be separated.

Coils

Stopper

Lead wires

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

Body

Indentation for Stopper (12 places around the circumference)

Part A

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

Part A

–81–

Check valves block (PURY-P200·250YMF-B)

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

Distributor

SV3

SV4

SV5

SV6

HEXA

HEXB HEXC HEXD HEXE

ST7b ST7cST7a

CV7

TH6

SV71

ST7d

CV9CV8

CV10

Check Valves Block

➄➅➆➇➈ ➉

CV4

CV6

Orifice

CV5

CV2

➀➁➂

CV3

BV1

➃

ST1

BV2

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

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

–82–

Power transistor

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

Internal voltage 1.5V (Power source : one dry cell battery)

Central value of resistance range 10 ~ 40Ω

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

Transistor module has 6 circuits shown in the left. (See figure below)

E1 C2,E1

Tester -

Tester ⊕

C ∞∞

B 2~100Ω 100~1500Ω

E 2~100Ω 100~1500Ω

CB E

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

123

Tester -

Tester

⊕

Tester ⊕

1 10~50Ω∞

2 10~50Ω∞

3 10~50Ω∞

Tester -

1 ∞ 10~50Ω

2 ∞ 10~50Ω

3 ∞ 10~50Ω

+–

1 2 3

–

–83–

(5) Trouble and remedy of remote controller

Symptom Cause Checking method & countermeasure

Despite pressing of remote controller switch, operation does not start with no electronic sound.

(No powering signal

appears.)

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

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

connected.

2 Slipping off of connector on heat source unit circuit

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

3 Faulty power source circuit of heat source unit.

• Faulty INV board,

• Blown fuse (F1 on INV board)

• Broken diode stack

• Broken resistor (R1) for rush current protection

2) Short circuit of transmission line.

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

block.

2 Erroneous connection of indoor/outdoor transmission line to

TB7.

4) Slipping off of transmission wiring at remote controller.

5) Faulty remote controller.

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

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

2) Faulty outdoor control circuit board or being out of control.

As normal transmission is failed between indoor and heat source units, heat source unit model can not be recognized.

a) Check transmission terminal block of

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

→ Faulty network remote controller

ii) In case of less than 17V

→ See “Transmission Power Circuit

(30V) Check Procedure”.

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

Checking method & countermeasure

Check indoor LED3

Lighting?

Lighting

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

Extinguishing or unable to confirm

Check indoor unit power source terminal block voltage

AC 220~240V?

YES

Check fuse on circuit board

Blown?

Check connector slipping off (CND, CNT, CN3T)

Slipped off?

Check transformer resistance value

Within rated?

YES

Check self-diagnosis function of heat source unit

Changed?

YES

Check main power source of power source wiring.

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

Improper connector connection

Check cause of transformer disconnection.

•Ground fault on circuit board

•Ground fault on sensor, LEV

Apply power source again.

Check self-diagnosis function after powering heat source unit again.

Faulty heat source unit control circuit board

Repair faulty point.

YES

Faulty indoor controller board

Changed?

YES

Casual trouble

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

–84–

Symptom Cause

3 “HO” display on re-

mote controller does not disappear and switch is ineffective.

(Without using MELANS)

1) Heat source unit address is set to “000.”

2) Erroneous address.

1 Address setting miss of indoor unit to be coupled with remote controller.

2 Address setting miss of remote controller.

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

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

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

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

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

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

9) Faulty heat source unit control circuit board.

10)Faulty indoor controller board.

11)Faulty remote controller.

(Interlocking control with MELANS)

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

13)Slipping off of centralized control transmission line (TB7) at heat source unit.

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

Checking method & countermeasure

(Indoor unit = remote controller - 100.)

(Remote controller = indoor unit + 100.)

In case no MELANS used

Same symptom for all units in a single refrigerant system?

YES

Check heat source unit address

51 ~ 100?

YES

Check centralized control switch SW2-1 at heat source unit

ON?

Faulty heat source unit control circuit board

YES

Heat source unit address setting miss

Switch setting miss Make it ON → OFF

Address setting miss of remote controller

Indoor address setting miss

Transmission line wiring miss of indoor unit M-NET

Slipping off of CN2M connector

Confirm address of remote controller with “HO” displayed

Indoor unit + 100?

Check address of coupling indoor unit

Remote controller

-100?

YES

Check voltage of indoor unit MNET transmission terminal block

17 ~ 30V?

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

YES

Check Fresh Master SW3-1

YES

Slipping off?

Faulty indoor controller board or remote controller

ON?

YES

Repair spot in trouble

Setting miss of Fresh Master SW3-1

In case with MELANS used

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

–85–

Symptom Cause Checking method & countermeasure

4 “88” appears on re-

mote controller at the registration and access remote controller

[Generates at registration and confirmation]

1) Erroneous address of unit to be coupled.

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

3) Faulty circuit board of unit to be coupled.

4) Installation miss of transmission line.

a) Confirm the address of unit to be

coupled.

b) Check the connection of transmission

line.

c) Check the transmission terminal block

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

[Confirmation of different refrigerant system controller]

5) Breaking of power source of heat source unit to be confirmed.

6) Slipping off of centralized control transmission line (TB7) of heat source unit.

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

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

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

10)Short circuit of centralized control transmission line.

d) Confirm the power source of heat source

unit to be coupled with the unit to be confirmed.

e) Confirm that the centralized control

transmission line (TB7) of heat source unit is not slipped off.

f) Confirm the voltage of centralized control

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

that other than i).

–86–

Transmission power circuit (30 V) check procedure If “” is not displayed by the remote control, investigate the points of the trouble by the following procedure and correct it.

No. Check item Judgment Response

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

DC24~30 V

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

Check if the following connectors are disconnected in the heat source unit’s control box. MAIN Board: CNS1, CNVCC3 INV Board: CNVCC1, CNL2, CNR, CNAC2

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

Tester + ..... 1 pin

Tester - ..... 3 pin

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

Tester + ..... 1 pin

Tester - ..... 3 pin

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

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

Except the above-mentioned

Connector disconnected

Except the above-mentioned

DC24~30 V

Except the above-mentioned

DC24~30 V

Except the above-mentioned

0.5~2.5Ω

Except the above-mentioned

19~25Ω

Except the above-mentioned

to No. 2

Connect the connectors as shown on the electric wiring diagram plate.

to No. 3

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

to No. 4

Check the wiring between CNVCC2 and CNVCC3 for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact.

to No. 5

to No. 6

Replace choke coil L2.

to No. 7

Replace R7.

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

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

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

0Ω

Except the above-mentioned

AC198~264 V

Except the above-mentioned

AC198~264 V

Except the above-mentioned

to No. 8

Replace F01

Replace the INV board.

to No. 9

Check the wiring to CNAC2 for the following and correct any defects. Broken wire, faulty contact.

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

–87–

(6) Investigation of transmission wave shape/noise

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

1) Symptom caused by the noise entered into transmission line

Cause Erroneous operation Error code

Noise entered into transmission line

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

Transmission wave shape changes to other signal due to

6600

6602

noise.

Transmission wave shape changes due to noise, and can

6607

not be received normally thus providing no reply (ACK).

Transmission can not be made continuously due to the

6603

entry of fine noise.

Transmission can be made normally, but reply (ACK) or answer can not be issued normally due to noise.

6607 6608

2) Method to confirm wave shape

No fine noise allowed *1

VHL

52 µs Logical

VBN

52 µs value “0”

Logical

52 µs value “1”

52 µs52 µs

No fine noise allowed *1

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

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

Logic value Transmission line voltage level

0VHL = 2.0V or more

1VBN = 1.3V or less

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

–88–

3) Checking and measures to be taken

(a) Measures against noise

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

Items to be checked Measures to be taken

1 Wiring of transmission and power lines in

crossing.

2 Wiring of transmission line with that of other

system in bundle.

3 Use of shield wire for transmission line (for

both indoor unit control and centralized control).

4 Repeating of shield at the repeating of

transmission line with indoor unit.

Checking for wiring method

5 Are the unit and transmission lines grounded

as instructed in the INSTALLATION MANUAL?

6 Earthing of the shield of transmission line (for

indoor unit control) to heat source unit.

7 Arrangement for the shield of transmission line

(for centralized control).

Check for earthing

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

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

Use specified transmission wire.

Type : Shield line CVVS/CPEVS Wire diameter : 1.25mm

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

Connect to ground as shown in the INSTALLATION MANUAL.

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

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

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

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

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

nected. Earth shield at all heat source units.

or more

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

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

under the state of “HO.”

Items to be checked Measures to be taken

8 The farthest distance of transmission line is

exceeding 200m.

9 The types of transmission lines are different.

0 No transmission power (30V) is being supplied

to the idoor unit or the remote control.

A Faulty indoor unit/remote controller.

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

Use the transmission wire specified.

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

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

Replace heat source unit circuit board or remote controller.

–89–

4) Treatment of inverter and compressor troubles If the compressor does not work when error codes 4210, 4240, 4310 or 4340 are detected, determine the point of malfunction by following the steps in the LED monitor display and countermeasures depending on the check code displayed, then perform the procedures below.

No. Check Item Symptoms Treatment

How many hours was the power kept on before

operation?

1 If it was kept on for 12 hours or

longer as specified.

2 It was kept on for less than the

specified period.

Go to [2].

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

When it is restarted, does

the trouble reappear?

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

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

1 The compressor stops and the

same error code is displayed.

1 The compressor stops and the

same error code is displayed.

2 If the inverter’s output voltage is

output with good balance, *1.

3 If the balance in the inverter’s

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

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

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

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

Coil resistance : 0.359 ~ 0.716Ω

Check the transistor module. Judge that the transistor module is faulty. (Go to “Individual Parts Failure Judgment Methods.”) If the transistor module is normal, replace the INV board, then perform this item again with SW1-1 ON. If the problem is solved and you connect the compressor again, turn SW1-1 OFF again. Check the compressor’s coil resistance and insulation resistance.

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

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

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

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

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

symbol) be used.

–90–

5) Troubleshooting at breaker tripping

Check items Measures to be taken

1 Check the breaker capacity.

The breaker’s capacity should be proper.

2 Check the a short circuit or grounding in the electrical

system other than the inverter.

3 Check the resistance between terminals on the terminal

block TB1A for power source.

1 0 ~ several ohms or improper megohm value

4 Checking by powering again.

1 Main power source circuit breaker tripping

2 No display of remote controller

5 Operational check by operating air conditioner

Correct any defects.

Check each part inside the inverter power circuit

(resistance, megohm or the like).

a) Diode stack

Refer to “Troubleshooting of diode stack.”

b) Power transistor

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

ment Methods.”

1 Normal operation without breaker tripping.

2 Breaker tripping

a) As there is a possibility of instantaneous short

circuit generated, find the mark of the short circuit

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

faulty.

The ground fault of inverter output/compressor can

be supposed.

Disconnect the wiring to the compressor and check

the insulation resistance of the following parts with

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

–91–

6) Individual parts failure judgment methods.

Part name Judgment method

Diode Stack (DS) Refer to “Judging Diode Stack Failure.”

Transistor Module (TRM) Refer to “Judging Transistor Module Failure.”

Electromagnetic Contactor (52C) Measure the resistance value at each terminal.

A1A2

1/L1 3/L2 5/L3

Check Location Judgment Value

A1-A2 0.1k~1.3kΩ

1/L1-2/T1 ∞ 3/L2-4/T2

2/T1 4/T2 6/T3

Rush current protection resistor (R1, 5) Measure the resistance between terminals: 4.5k~5.5kΩ

DC reactor (DCL) Measure the resistance between terminals: 1 Ω or lower

Measure the resistance between the terminals and the chassis: ∞

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

5/L3-6/T3

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

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

[Caution at replacement of inverter parts]

1 The transistor module and INV board should be replaced together at the same time.

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

2 Fully check wiring for incorrect and loose connection.

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

3 Coat the grease for radiation provided uniformly onto the radiation surface of transistor/diode modules.

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

–92–

–93–

(8) Troubleshooting the major components of the BC controller

1) Pressure sensor Pressure sensor troubleshooting flow

START

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

OK?

Ye s

Unit running?

Ye s

Check on the LED monitor display.

• TH2 or LPS of heat source unit.

• HPS of heat source unit

• PS1, PS3 of BC controller and

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

PS3 > LPS

OK?

Ye s

Stop the unit (compressor OFF).

At least

10 minutes passed since

stopping?

Ye s

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

Note 1

Note 2

Take corrective action.

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

OK?

Ye s

Correct refrigerant piping and transmission line.

OK?

Ye s

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

1kg/cm2G

(0.098MPa)

OK?

Ye s No board or pressure sensor abnormality.

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

OK?

Ye s

Confirm the

following relationship PS1

PS3?

Ye s

Correct refrigerant piping and the transmission line.

Check for the faulty connector on applicable pressure sensor.

OK?

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

Pressure

range within 0 to 1kg/cm

(0.098MPa)

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

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

Replace the wrong puressure sensor by the correct pressure sensor, and confirm detected pressure is indicated correctly.

OK?

Yes

Note 3

Note 4

Repair faulty connection.

–94–

Change pres-

Yes

sure sensor.

Change board.

Note 1 :

• Symptoms of incorrect connection of BC controller pressure sensor to the board

Symptom

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

Normal

Insufficient cooling.

SC11 large SC16 small

PHM < 0

Warm indoor SC small. Warm indoor thermo ON

SC11 small SC16 small

PHM < 0

especially noise.

Note 2 :

• Check using LED monitor display switch (heat source unit MAIN board SW1)

Insufficient heating Warm indoor SC small

SC11 large

SC16 small Warm indoor thermo ON especially noise

PHM < 0

Measured Data

High pressure

Low pressure

BC controller pressure

Signal

HPS

LPS

PS1

SW1 Setting

1ON2345678910

(liquid measurement)

(intermediate)

PS3

1ON2345678910

Note 3 :

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

Note 4 :

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

Pressure Sensor Replacement Precaution

(Pressure sensor output voltage)

–95–

2) Temperature sensor

Thermistor troubleshooting flow

Start

Note 1

Disconnect applicable thermistor connector from the board.

Note 2

Measure temperature of applicable thermistor (actual measured value).

Note 3

Check thermistor resistance value.

Compare temperature for thermistor resistance value with actual measured valued.

difference?

Ye s

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

difference?

Ye s

No abnormality

Note 4

Note 5

Change thermistor.

Check for connection problem.

Change the controller board.

–96–

Note 1 :

• Board connector CN10 corresponds to TH11 through TH12, while connector CN11 corresponds to TH15 through TH16. Remove the applicable connector and check the sensor for each number.

Note 2, 3 :

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

2. Measure resistance using a tester or other instrument.

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

Resistance measurement point (connector)

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

Temperature sensor resistance (graph)

Resistance value (kΩ)

Temperature (˚C)

Note 4 :

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

Measured Data Signal SW1 Setting

Liquid inlet temperature

Bypass outlet temperature

Bypass inlet temperature

TH11

TH12

TH15

TH16

1ON2345678910

Thermistor Ro=15 kΩ

Rt=15exp 3460 ( – )

273+t1273t

–97–

Mitsubishi MEE99K029J Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual