Mitsubishi PRH-P8(200)MYA, PRH-P10(250)MYA, PRH-P16(400)MYA, PRH-P20(500)MYA Service Manual

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Page 1

TECHNICAL & SERVICE MANUAL

AIR-COOLED ROOFTOP PACKAGED AIR CONDITIONERS

For use with the R407C

2007

HEAT PUMP PRH-P8MYA

PRH-P10MYA PRH-P16MYA PRH-P20MYA PRH-P200MYA PRH-P250MYA PRH-P400MYA PRH-P500MYA

Models

<Unit>

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Contents

Page

PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

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

[2] Brazing

[3] Airtightness Test

[4] Vacuuming

[5] Charging of Refrigerant

TYPICAL INSTALLATION EXAMPLE

MODEL-DESIGNATION BREAKDOWN

PART NAMES AND FUNCTIONS

SPECIFICATIONS

ELECTRICAL DATA

EXTERNAL DIMENSIONS

REMOTE CONTROLLER

ELECTRICAL WIRING DIAGRAM

[1] Unit

[2] Skeleton of Transmission Line Connection

Technical Data to Meet LVD

[1] Standard Operation Data

[2] Cooling Capacity Curves

[3] Heating Capacity Curves

[4] Reduction Ratio by Frosting

[5] Capacity/Input Ratio against Changes in Room Airflow Rate

[6] Bypass Factor Curves

[7] Cooling Sensible Heating Capacity Table

[8] Fan Performance

[9] Center of Gravity

[10] NC Curve

A SERVICE DATA

[1] Appearance of Equipment

[2] Refrigerant Circuit

[3] Refrigerant Charge

[4] Operation Range

[5] Safety & Control Devices

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Page

B CONTROL

[1] Composition of Control

[2] Control specifications

[3] Function of switches and connectors (outdoor-side)

[4] Function of switch on indoor-side controller board

[5] Simple parts check method

[6] Reference Data

[7] Troubleshooting of each part

[8] Emergency operation

[9] Self-diagnosis and troubleshooting

C Test run

[1] Before test run

[2] Test run procedures

[3] Self-diagnosis (PAR-20MAA)

[4] Self-diagnosis (PAR-21MAA)

[5] Remote controller diagnosis (PAR-20MAA)

[6] Remote controller check (PAR-21MAA)

D INSTALLATION

[1] Space required around units

[2] Installation of the unit

[3] Duct construction

[4] Lifting method

[5] Drain piping

[6] Modification method of fan direction (From side flow to top flow)

[7] The putting condition of the belt

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Page 5

PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

Caution

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

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

Use liquid refrigerant to seal the system.

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

Do not use a refrigerant other than R407C.

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

Be especially careful when managing the tools.

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

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

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

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.

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[1] 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 Identification of dedi-

cated use for R407C: Record refrigerant name and put brown belt on upper part of cylinder.

Vacuum pump Vacuum drying Current product Can be used by attach-

ing an adapter with a

check valve. 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 Ester oil or Ether oil or

Alkybenzene (Small

amount) 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

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

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.

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Page 7

[2] 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.

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Page 8

[3] 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.

[4] 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.

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[5] Charging of Refrigerant

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

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

Cylinder color identification R407C-Gray Charged with liquid refrigerant

R410A-Pink

Reasons:

1. R407C is a mixture of 3 refrigerants, each with a different evaporation temperature. Therefore, if the equipment 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.

Cylin-

der

Cylin-

der

Valve

Liquid

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Page 10

TYPICAL INSTALLATION EXAMPLE

MODEL-DESIGNATION BREAKDOWN

Series symbol Self-contained type (rooftop type)

Refrigerant P=R407C

Heat pump type

Series symbol Y=3-phase 380V,400V,415V,50Hz,3N~

Design sequence

Compressor horse power

Design sequence

Service reference

PRH

P R H P 1 0 M Y A E U

8=8HP 10=10HP 16=16HP 20=20HP 200=8HP 250=10HP 400=16HP 500=20HP

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Page 11

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

ßC

CHECK

CHECK MODE

FILTER

TEST RUN FUNCTION

ßC

1Hr.

NOT AVAILABLE

STAND BY DEFROST

FILTER

CHECK

TEST

TEMP.

TIMER SET

2 3

Unit

• Return air : Sucks the ambient air in.

• Supply air : Blows the air back out into

Supply air

Return air

the room.

Remote controller PRH-P8, 10, 16, 20MYA (PAR-20MAA)

• Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

[Operation buttons]

[Room temperature adjustment] Button [Timer/continuous] Button [Selecting operation] Button [Time selection] Button [Time-setting] Button [Louver] Button (This button does not operate in this model) [Fan speed adjustment] Button [Up/down airflow direction] Button (This button does not operate in this model) [Ventilation] Button [Checking/built-in] Button [Test run] Button [Filter] Button (This button does not operate in this model) [ON/OFF] Button Position of built-in room temperature

• Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measurement of room temperature.

• Never place any obstacle around the lower right-hand section of the remote controller. Doing so can result in the erroneous measurement of room temperature.

456879

PART NAMES AND FUNCTIONS

1 2 3 4

5 6 7 8 9

0 1 2 3

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Page 12

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

ßC

CHECK

CHECK MODE

FILTER

TEST RUN FUNCTION

ßC

1Hr.

NOT AVAILABLE

STAND BY DEFROST

TEMP.

D U T S Q C

GH JKLI

B A

R P

O N M

[Display]

Caution:

• Only the Power display lights when the unit is stopped and power supplied to the unit.

• When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a malfunction.

• When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch

button and

TEMP. adjustment button do not operate.

• “NOT AVAILABLE” is displayed when the Airflow direction button or Louver button are pressed. This indicates that this room unit is not equipped with the fan direction adjustment function and the louver function.

• When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max. 2 minutes). Please wait until this “H0” indication disappear then start the operation.

A Current time/Timer C Centralized control D Abnormality control E Operation mode: COOL, AUTO,

FAN, HEAT

F Preparing for Heating mode G Defrost mode H Set temperature I Power ON J Louver

K Not available function L Ventilation M Function setting mode N Test run mode O Error check mode P Filter sign Q Set effective for 1 hr. R Sensor position S Room temperature T Airflow U

Fan speed

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PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

45 67

˚F˚C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

ON OFFHrAFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

D E

FGHIJKLM

O P

Set Temperature buttons

Down

Timer Menu button (Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button (Set Day button)

Louver button (

Operation button)

To preceding operation number.

Ventilation button (

Operation button)

To next operation number.

ON/OFF button

9 an Speed button

Opening the door.

0 Filter button (<Enter> button)

A Test Run button

B Check button (Clear button)

C Airflow Up/Down button

Notes:

• If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available” message.

• If you are using the remote controller to drive multiple indoor units, this message will appear only if the feature is not present at the parent unit.

• Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measurement of room temperature.

• Never place any obstacle around the lower right-hand section of the remote controller. Doing so can result in the erroneous measurement of room temperature.

Day-of-Week

Shows the current day of the week.

Time/Timer Display

Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, shows the time remaining.

“Sensor” indication

Displayed when the remote controller sensor is used.

Identifies the current operation

Shows the operating mode, etc. * Multilanguage display is supported.

“Centrally Controlled” indicator

Indicates that operation of the remote controller has been prohibited by a main controller.

“Timer Is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Up/Down Air Direction indicator

The indicator

shows the direction of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to weak and downward during COOL or DRY mode . (Oper

ation varies according to model.) The indicator goes off after one hour, at which time the airflow direction also changes

Louver display

Indicates the action of the swing louver. Does not appear if the louver is stationary .

Room T

J emperature display

Shows the room temperature.

(Power On indicator)

Indicates that the power is on.

L Ventilation indicator

Appears when the unit is running in Ventilation mode.

M Fan Speed indicator

Shows the selected fan speed.

N “Locked” indicator

Indicates that remote controller buttons have been locked.

O “Clean The Filter” indicator

Comes on when it is time to clean the filter.

P Timer indicators

The indicator comes on if the corresponding timer is set.

Note:

• For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit.

Remote contr

PRH-P200, 250, 400, 500MYA (PAR-21MAA)

oller-Button

Remote controller-Display

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Page 14

SPECIFICATIONS

Model name PRH-P8MYA/P200MYA PRH-P10MYA/P250MYA Mode

Capacity

Cooling Heating Cooling Heating

20.9

kcal/h

Btu/h

CMM

dB(A)

23.7 26.0 30.5 18,000 19,000 22,400 26,200 71,430 75,400 88,890 104,000

R407C

3N~ 380/400/415V 50Hz

Convertible(Side flow<factory setting> or top flow)

Sirrocco fan x 2

8.12 8.02 10.22 9.82

14.7 14.5 18.8 18.2

C to 30°C 17°C to 28°C 19°C to 30°C 17°C to 28°C

100

407

5.5

Three-phase induction motor

1.1

100

412

7.5

1.5

Cross fin

Propeller fan x 1

185

Three-phase induction motor

0.38

Cross fin

Hermetic

FVC68D(ether oil)

0.05 (240V)

Polyester powder (MUNSELL 5Y8/1)

1,715 x 2,000 x 926

Field supplied

Refrigerant Power source Electrical

characteristics

Power consumption Operating current

Type x Quantity Air flow rate External static pressure Motor type Motor output

Type x Quantity Air flow rate Motor type Motor output

Type Motor output Oil type Crankcase heater

H x W x D

Remote controller temperature setting range Indoor-side air flow direction Indoor-side fan

Indoor-side heat exchanger type

Outdoor-side fan

Outdoor-side heat exchanger type Compressor

External finish External dimension Air filter Drain pipe Thread Noise level Net weight Protection devices High pressure switch , Low pressure switch , fuse

Over current relay(compressor , indoor-side fan motor) inner thermal switch in outdoor-side fan motor

Note 1. Cooling and Hetaing capacity indicates the maximum value at operation under the following condition.

Cooling Indoor : 27

CDB/19°CWB Outdoor : 35°CDB

Heating Indoor : 20

CDB Outdoor : 7°CDB/6°CWB

2. The operating noise measuring point is 1m from the bottom of unit (1m from the front of the unit) in an anechoic room. (Noise level is A-scale value)

3. Refrigerant charge volumes are factory charged.

4. The range of working voltage is with in ±10% voltage of power supply.

5. Specification subject to change without notice.

Specifications of air-source heat pump type packaged air conditioner

(Rooftop unit)

- 10 -

Page 15

- 11 -

Model name PRH-P16MYA/P400MYA PRH-P20MYA/P500MYA Mode

Capacity

Cooling Heating Cooling Heating

41.8

kcal/h

Btu/h

CMM

dB(A)

47.4 52.0 61.0

36,000 40,800 44,800 52,400

142,860 150,800 177,780 208,000

R407C

3N~ 380/400/415V 50Hz

Convertible(Side flow<factory setting> or top flow)

Sirrocco fan x 2

16.60 15.94 21.44 19.24

29.6 29.2 36.6 35.4

C to 30°C 17°C to 28°C 19°C to 30°C 17°C to 28°C

140 200

857

5.5 x 2

Three-phase induction motor

2.2

180 200

872

7.5 x 2

3.7

Cross fin

Propeller fan x 2

185 x 2

Three-phase induction motor

0.38 x 2

Cross fin

Hermetic

FVC68D(ether oil)

0.05 (240V) x 2

Polyester powder (MUNSELL 5Y8/1)

1,735 x 2,000 x 2,130

Field supplied

Refrigerant Power source Electrical

characteristics

Power consumption Operating current

Type x Quantity Air flow rate External static pressure Motor type Motor output

Type x Quantity Air flow rate Motor type Motor output

Type Motor output Oil type Crankcase heater

H x W x D

Remote controller temperature setting range Indoor-side air flow direction Indoor-side fan

Indoor-side heat exchanger type

Outdoor-side fan

Outdoor-side heat exchanger type Compressor

External finish External dimension Air filter Drain pipe Thread Noise level Net weight Protection devices High pressure switch , Low pressure switch , fuse

Over current relay(compressor , indoor-side fan motor) inner thermal switch in outdoor-side fan motor

Note 1. Cooling and Hetaing capacity indicates the maximum value at operation under the following condition.

Cooling Indoor : 27

CDB/19°CWB Outdoor : 35°CDB

Heating Indoor : 20

CDB Outdoor : 7°CDB/6°CWB

2. The operating noise measuring point is 1m from the bottom of unit (1m from the front of the unit) in an anechoic room. (Noise level is A-scale value)

3. Refrigerant charge volumes are factory charged.

4. The range of working voltage is with in ±10% voltage of power supply.

5. Specification subject to change without notice.

Specifications of air-source heat pump type packaged air conditioner

(Rooftop unit)

Page 16

ELECTRICAL DATA

VOLT

TOTAL INPUT TOTAL RATED CURRENT POWER FACTOR START CURRENT COMPRESSOR INPUT RATED CURRENT O/D FAN INPUT RATED CURRENT I/D FAN External static pressure INPUT RATED CURRENT TOTAL INPUT TOTAL RATED CURRENT POWER FACTOR START CURRENT COMPRESSOR INPUT RATED CURRENT O/D FAN INPUT RATED CURRENT I/D FAN External static pressure INPUT RATED CURRENT TOTAL INPUT TOTAL RATED CURRENT POWER FACTOR START CURRENT COMPRESSOR INPUT RATED CURRENT O/D FAN INPUT RATED CURRENT I/D FAN External static pressure INPUT RATED CURRENT

415V

400V

380V

8.12

14.7 76

111

6.96

11.9

0.31

1.1

100

0.85

1.7

8.12

14.7 79

111

6.96

11.9

0.31

1.1

100

0.85

1.7

8.12

14.7 83

111

6.96

11.9

0.31

1.1

100

0.85

1.7

8.02

14.5 76

111

6.86

11.7

0.31

1.1

100

0.85

1.7

8.02

14.5 79

111

6.86

11.7

0.31

1.1

100

0.85

1.7

8.02

14.5 84

111

6.86

11.7

0.31

1.1

100

0.85

1.7

10.22

18.8 75

134

8.71

14.9

0.31

1.1

100

1.2

2.8

10.22

18.8 78

134

8.71

14.9

0.31

1.1

100

1.2

2.8

10.22

18.8 82

134

8.71

14.9

0.31

1.1

100

1.2

2.8

9.82

18.2 75

134

8.31

14.3

0.31

1.1

100

1.2

2.8

9.82

18.2 77

134

8.31

14.3

0.31

1.1

100

1.2

2.8

9.82

18.2 81

134

8.31

14.3

0.31

1.1

100

1.2

2.8

ITEM

PRH-P8MYA/P200MYA PRH-P10MYA/P250MYA

Cooling

VOLT

415V

400V

380V

16.60

29.6 78

126

14.38

23.8

0.62

2.2

200

1.6

3.6

16.60

29.6 80

126

14.38

23.8

0.62

2.2

200

1.6

3.6

16.60

29.6 85

126

14.38

23.8

0.62

2.2

200

1.6

3.6

15.94

29.2 75

126

13.72

23.4

0.62

2.2

200

1.6

3.6

15.94

29.2 78

126

13.72

23.4

0.62

2.2

200

1.6

3.6

15.94

29.2 82

126

13.72

23.4

0.62

2.2

200

1.6

3.6

21.44

36.6 81

152

18.82

29.8

0.62

2.2

200

2.0

4.6

21.44

36.6 84

152

18.82

29.8

0.62

2.2

200

2.0

4.6

21.44

36.6 89

152

18.82

29.8

0.62

2.2

200

2.0

4.6

19.24

35.4 75

151

16.62

28.6

0.62

2.2

200

2.0

4.6

19.24

35.4 78

151

16.62

28.6

0.62

2.2

200

2.0

4.6

19.24

35.4 82

151

16.62

28.6

0.62

2.2

200

2.0

4.6

ITEM

PRH-P16MYA/P400MYA PRH-P20MYA/P500MYA

Cooling Heating HeatingCooling

Heating HeatingCooling

- 12 -

Page 17

• Models PRH-P8MYA/P10MYA/P200MYA/P250MYA

EXTERNAL DIMENSIONS

Drain R1

Fresh air

intake

(Both side)

28- ø 3 Holes

18- ø 3 Holes

Supply air

duct flange

Return air

duct flange

Note 3

Y-Y

X-X

Left side view

ø 25.4 Knockout hole

<Bottom side hole for

the controller wiring>

Note 1

ø 38.1 Knockout hole

<Bottom side hole for

the power supply wiring>

Top view

Drain R1

6-14X20 holes

<For mounting

anchor bolt M8>

[Field supply]

ø 3.9 holes

(Both side)

Return

air

Supply

air

Service panel

Knockout hole

ø 27 hole

<Front side hole for

the controller wiring>

(Accessory plate)

Service panel

Front view

Note 2

ø 40 hole

<Front side hole for

the power supply wiring>

(Accessory plate)

Note 1. It is possible to change to ø 27 or

ø 34 by selecting the conduit

mounting plate.

2. The hole size can be selected to

ø 27 or ø 34 or ø 40 by selecting

the conduit mounting plate.

3. These dimension of supply air and

return air duct flange are the same.

• Conduit mounting plate

(Painted the same color as the unit body)

ø 27

..................................................

1pc.

ø 34

..................................................

1pc.

ø 40 and ø 27

.................................

1pc.

• Tapping screw 4X12

........................

4pcs.

Air inlet

Air outlet

Air inlet

Right side view

ø 38.1 Knockout hole

<Right side hole for

the power supply wiring>

ø 25.4 Knockout hole

<Right side hole for

the controller wiring>

270 1569

250 1579

18518595 350105

149

495

585

144

1932

2000

7X130Pitch= 910

5X135Pitch= 675

121

155 611

4646

36.5

135

36.5

748

10 800 800

1515

840

880

910

961

1399

43 151001001543

130

23038699560

1715

82960

165 794

6084

- 13 -

Page 18

- 14 -

4X150Pitch=600

65 65

(730)

(434)

150

44 13X150Pitch=1950 44

150

(2038)

(1312)

56 8X150Pitch=1200 56

150

50 50

165 794

169

104

839

155155105

290115

1030

293 525

434202

46 2038 46

1312

73080

80104

1661

1671

200

180

1549

2170

2200

1515

68 1932

800 800 144

2000

2130

585

495

585

111

155 611

1735

150

• Models PRH-P16MYA/P20MYA/P400MYA/P500MYA

Supply air cover

for top flow

Air

inlet

Air

inlet

Air

outlet

Service panel

air

Return

air

Air

inlet

Fresh air

intake

(Both side)

Drain

Supply air

Return air

duct flange

Note 2

duct flange

Note 2

Y-Y

X-X

Left side view

ø25.4 Knockout hole

<Bottom side hole for

the controller wiring>

Note 1

ø50.8 Knockout hole

<Bottom side hole for

the power supply wiring>

Top view

Drain R1

6-14X20 holes

<For mounting

ø3.9 holes

(Both side)

anchor bolt M10>

[Field supply]

ø27 hole

<Front side hole for

the controller wiring>

(Accessory plate)

Supply

Knockout hole

Service panel

Front view

Note 1

ø52 hole

<Front side hole for

the power supply wiring>

(Accessory plate)

Note 1.It is possible to change to

ø40 by

selecting the conduit mounting plate.

2. Dimension of supply air and return air

duct flange are shown below.

• Conduit mounting plate

(Painted the same color as

the unit body)

ø40 ············ 1pc.

············ 1pc.

············ 4pcs.

ø52 and ø27

• Tapping screw 4X12

Air

outlet

Right side view

ø50.8 Knockout hole

<Right side hole for

the power supply wiring>

ø25.4 Knockout hole

<Right side hole for

the controller wiring>

Return air

duct flange

38- ø3 Holes

24-

ø3 Holes

Supply air

duct flange

Page 19

- 15 -

REMOTE CONTROLLER

(Front view) (Side view) (Rear view)

120

130

83.5

Page 20

- 16 -

[1] Unit

• Models PRH-P8MYA/P10MYA

ELECTRICAL WIRING DIAGRAM

Symbol Name Symbol Name Symbol Name

IN DOOR

-SIDE

OUT DOOR

-SIDE

SURGE KILLER

COND/EVA TEMP

LIQUID PIPE TEMP

ROOM TEMP

COND/EVA TEMP

DISCHARGE TEMP

THERMISTOR

FERRITE CORE

FB1,FB2

TH6

TH5

TH4

TH3

TH2

TH1

LIQUID PIPE TEMP

PRESSURE SWITCH (FOR CONTROL)

PRESSURE SWITCH (HIGH PRESSURE)

OVER CURRENT RELAY (INDOOR-SIDE FAN MOTOR)

FAN MOTOR (INDOOR-SIDE)

TERMINAL BLOCK

ELECTRONIC EXPANSION VALVE

CRANK CASE HEATER (COMPRESSOR)

SOLENOID VALVE

4-WAY VALVE

FAN MOTOR (OUTDOOR-SIDE)

PRESSURE SWITCH (LOW PRESSURE)

MAGNETIC CONTACTOR (COMPRESSOR)

MAGNETIC CONTACTOR (INDOOR-SIDE FAN MOTOR)

52F

51F

MF1

TB1,5

LEV

SV1

21S4

OVER CURRENT RELAY (COMPRESSOR)

COMPRESSOR MOTOR

TRANSFORMERTR

MF2

63H2

63H1

63L

52C

51C

FUSE (15A 250VAC CLASS T)F1,F2

Symbol Name

TERMINAL BLOCKTB6

REMOTE CONTROLLER

LED (FOR SERVICE) AUXILIARY RELAY SWITCHSW1-5

LED1 X01-X05

FUSE (6.3A 250VAC CLASS F)F01-F04

FUSE (6.3A 250VAC CLASS F)F10-F30

INDOOR-SIDE

CONTROLLER BOARD

X4-6 SW1 SW2 SWE LED1 LED2 LED3

LED (TRANSMISSION<INDOOR-SIDE·OUTDOOR-SIDE>)

LED (POWER SUPPLY<REMOTE CONTROLLER>)

LED (POWER SUPPLY)

SWITCH (EMERGENCY OPERATION)

SWITCH (CAPACITY CORD)

SWITCH (MODEL SELECTION)

AUXILIARY RELAY

INDOOR-SIDE

POWER

BOARD

OUTDOOR-SIDE

CONTROLLER BOARD

N.F

BOARD

F1 ZNR

FUSE (4A 250VAC CLASS T)

VARISTOR

BLACK (WITH INDOOR POWER BOARD)

51F

CN90

CN2L

CN22

CN32

CN41

CN29

CN21

CN2D DC14V

CN03

157

FAN

5321

X4 X5 X6

LCD

ZNR

CN01

CN02

52F

TH6

TH5

TH4

TB5

FB1

CN2S DC14V

SWE

SW1

REMOTE CONTROLLER

LED1 LED2 LED3

DC 14V

OFF

1 2 3 4

(*3)SW2

CN20

OFF

1234

INDOOR-SIDE

POWER BOARD

INDOOR-SIDE CONTROLLER BOARD

FB2

REMOTE CONTROLLER

BOARD

1 2

RETURN AIR DUCT

SUPPLY AIR DUCT

1 2 3 4

1 2 3

1 2

X6X51X4

6 7 8

TB6

531

BLACK

WHITE

RED

CNIN

LED1

SW3

OFF

3456

(*2)SW5

65112

OFF

OUTDOOR-SIDE CONTROLLER BOARD

OFF

SW2

SW1SW4

OFF

C14

63H2

121

CN51

CN81

CN27

CN24

CN3D

DC POWER SUPPLY

CN3N

CN3S

CN34CN28

3131

TRANSMISSION

CIRCIT

CNS3

CH 63L63H1

SV1

21S4

TH3TH2TH1

LEV

X05

X02

X03

X01

CN4

CN312CN2CN40CNMNTCNVMNT

CNFG

F01

F04

F02

F03

CN20

CNFC1

CN52

CN53

CN25

CN26

X04

CN21

CN22

CN23

52C

51C

531

CNOUT1

MF1

51F

52F

WHITE

BLUE3BLACK

RED

F30

WHITE

F20

F10

BLACK

CNOUT2

51C

52C

MF2

RED

TB1

432

L25L3 N PE

(*1)

POWER SUPPLY 3N

~PE

380/400/415V 50HZ

CNPOW

CNFC2

CNFAN

C11

CIRCUIT BREAKER (FIELD SUPPLY) PRH-P8MYA : 63A PRH-P10MYA: 63A

N.F.BOARD

GREEN/YELLOW

F.C. BOARD

C12

CONTROL BOX

Note:1. The dotted lines show field wiring.

2. Color of earth wire is yellow and green twisting.

3. Specification subject to change without notice.

4.This motor(*1) includes auto reset type internal thermostat.

5. SW5(

2)[outdoor-side controller board] is shown

In case of PRH-P8MYA setting is shown as below.

PRH-P10MYA setting.

6. SW2(

3)[indoor-side controller board] is shown

In case of PRH-P8MYA setting is shown as below.

PRH-P10MYA setting.

7. Emergency operation If a trouble occurs with either the remote controller or the unit microcomputer and no other trouble exists, emergency operation for cooling or heating can be performed by changing the setting of switch (SWE) on the indoor-side controller board.

8. mark is connector.

Caution,

1. To protect compressor and fan motor (indoor-side) from

abnormal current, over current

relays is installed. Therefore, do not change factory over current relays is installed. Therefore, do not change

factory set value of over current relays.

ON OFF

SW5

(*2)

ON OFF

SW2

4321

(*3)

[intdoor-side controller board]

[outdoor-side controller board]

4321

Page 21

- 17 -

• Models PRH-P16MYA/P20MYA

Symbol Name Symbol Name Symbol Name

IN DOOR

OUT DOOR

SURGE KILLER

COND/EVA TEMP

LIQUID PIPE TEMP

ROOM TEMP

COND/EVA TEMP

DISCHARGE TEMP

THERMISTOR

FERRITE CORE

FB11,12,21,22

TH6-1,TH6-2

TH5-1,TH5-2

TH4-1,TH4-2

TH3-1,TH3-2

TH2-1,TH2-2

TH1-1,TH1-2

LIQUID PIPE TEMP

PRESSURE SWITCH (FOR CONTROL)

PRESSURE SWITCH (HIGH PRESSURE)

OVER CURRENT RELAY (INDOOR FAN MOTOR)

FAN MOTOR (INDOOR)

TERMINAL BLOCK

ELECTRONIC EXPANSION VALVE

CRANK CASE HEATER (COMPRESSOR)

SOLENOID VALVE

4-WAY VALVE

FAN MOTOR (OUTDOOR)

PRESSURE SWITCH (LOW PRESSURE)

MAGNETIC CONTACTOR (COMPRESSOR)

51F

MF1

TB1,5,11,21

LEV1,LEV2

CH1,CH2

SV11,SV12

21S41,21S42

MAGNETIC CONTACTOR (INDOOR FAN MOTOR)

52F

OVER CURRENT RELAY (COMPRESSOR)

TR1,TR2

MF21,MF22

MC1,MC2

63H21,63H22

63H11,63H12

63L1,63L2

52C1,52C2

51C1,51C2

COMPRESSOR MOTOR

F11,12,21,22

TRANSFORMER

FUSE (15A 250VAC CLASS T)

Symbol Name

TERMINAL BLOCKTB6

REMOTE CONTROLLER

LED (FOR SERVICE) AUXILIARY RELAY SWITCHSW1-5

LED1 X01-X05

FUSE (6.3A 250VAC CLASS F)F01-F04

FUSE (6.3A 250VAC CLASS F)F10-F30

INDOOR

CONTROLLER BOARD

X4-6 SW1 SW2 SWE LED1 LED2 LED3

LED (TRANSMISSION<INDOOR·OUTDOOR>)

LED (POWER SUPPLY<REMOTE CONTROLLER>)

LED (POWER SUPPLY)

SWITCH (EMERGENCY OPERATION)

SWITCH (CAPACITY CORD)

SWITCH (MODEL SELECTION)

AUXILIARY RELAY

INDOOR

POWER

BOARD

OUTDOOR

MAIN BOARD

N.F

BOARD

F1 ZNR

FUSE (4A 250VAC CLASS T)

VARISTOR

Note:1. The dotted lines show field wiring.

2. Color of earth wire is yellow and green twisting.

3. Specification subject to change without notice.

4.This motor(*1) includes auto reset type internal thermostat.

5. SW5(

2)[outdoor main board] shows PRH-P20MYA setting.

Control box no.1

In case of PRH-P16MYA setting is shown as below.

6. SW2(

3)[indoor controller board] shows

In case of PRH-P16MYA setting is shown as below.

PRH-P20MYA setting.

8. mark is connector.

Caution,

1. To protect compressor and fan motor (indoor) from abnormal current, over current relays is installed. Therefore, do not change factory set value of over current relays.

ON OFF

SW5(*2)

ON OFF

SW2

4321

(*3)

[intdoor controller board]

[outdoor main board]

4321

Control box no.2

ON OFF

SW5(*2)

[outdoor main board]

4321

CONTROL BOX NO.2CONTROL BOX NO.1

BLACK

WHITE

RED

C19

X22

1 2

GREEN/YELLOW

BLUE

BLACK

WHITE

RED

X11

PE N L3 L2 L1

6 5 4 3 2 11

TB1

POWER SUPPLY 3N

~PE 380/400/415V 50HZ

63H22

LED1

SW3

(*2)SW5

OUTDOOR MAIN BOARD

OFFON

SW2

TR2

SW1

SW4

OFF

C14

CN51

CN3D

DC POWER SUPPLY

CN34

CN28

TRANSMISSION CIRCUIT

CNS3

CH2

63L2

63H12

21S42

TH3-2

LEV2

X05X02

X03

X01

1 2

CN4

CNMNT

CNVMNT

CNFG

F01

CN20

CNFC1

CN52

X04

52C2

51C2

TH2-2

TH1-2

CN3

CN2

CN40

CN3S CN3N CN24 CN27 CN81

F04 F02 F03

357

L2NL1

CN53CN25

3131531313131

CN26CN21CN22CN23

ON OFF ONOFF

X22

2 1

4 3 2 1

52C2

SV12

MF22

(*1)

C12

C11

CNFC2

CNFAN

F.C . BOARD

CNOUT1

CNOUT2

N.F.BOARD

F20

F30

F10

7513

CNIN

CNPOW

MC2

BLACK

RED

WHITE

51C2

52C2

BLUE BLACK

RED

WHITE

TB21

GREEN/YELLOW

RED

WHITE

BLACK

RED

WHITE

BLACK

WHITE

BLACK

753

MF21

6 5 4 3 2 1

X11

OFFONOFFON

CN23 CN22 CN21 CN26

1313131351313

CN25 CN53

151 6

L1 N L2

753

F03F02F04

CN81CN27CN24CN3NCN3S

CN40

CN2

CN3

TH1-1

TH2-1

1 2

CIRCUIT BREAKER (FIELD SUPPLY) PRH-P16MYA: 63A PRH-P20MYA: 70A

C12

F.C . BOARD

N.F.BOARD

C11

CNFAN

CNFC2

CNPOW

(*1)

TB11

52C1

51C1

MC1

CNOUT2

RED

F10

F20

F30

BLUE

52F

51F

MF1

CNOUT1

51C1

52C1

X04

CN52

CNFC1

CN20

F01

CNFG

CNVMNT

CNMNT

CN4

X01

X03

X02

X05

LEV1

TH3-1

21S41

SV11

63H11

63L1

CH1

CNS3

TRANSMISSION CIRCUIT

CN28

CN34

DC POWER SUPPLY

CN3D

CN51

63H21

C14

OFF

SW4

SW1

TR1

SW2

ON OFF

OUTDOOR MAIN BOARD

(*2)SW5

SW3

LED1

CNIN

C28

INDOOR POWER BOARD

BLACK

(WITH INDOOR POWER BOARD)

C18

C28

51F

52F

F22 F12

TH4-2

TH5-2 TH6-2

FB22

1234

CN41

12 12

CN29CN21 CN20

1 2 3 4

SW2

(*3)

1 2 3 4 5

SW1

SWE

FAN

CN03

123

CN32

INDOOR CONTROLLER BOARD

1 2

CN2D DC14V

1122

CN22CN2L

789123456

CN90

FB12

CN01

213

CN02

ZNRF1

DC14V

CN2S DC14V

LED1 LED2 LED3

REMOTE CONTROLLER

BOARD

TB6

LCD

LED1LED2 LED3

987654123

2121

ONOFF

SWE

1 2 3 4

ONOFF

SW2(*3)

1 2 3 4 5

ONOFF ONOFFON OFFON OFF

SW1

1212432

F21

F11

SUPPLY AIR DUCT

RETURN AIR DUCT

FB21

INDOOR CONTROLLER BOARD

INDOOR POWER BOARD

CN20

DC14V

REMOTE CONTROLLER

CN2S DC14V

FB11

TB5

TH4-1

TH5-1 TH6-1

CN02

CN01

ZNR

FAN

CN03

CN2D DC14V

CN21

CN29

CN41

CN32

CN22CN2L

CN90

(WITH INDOOR POWER BOARD)

BLACK

Page 22

INDOOR

OUTDOOR

SURGE KILLER

COND/EVA TEMP

LIQUID PIPE TEMP

ROOM TEMP

COND/EVA TEMP

DISCHARGE TEMP

THERMISTOR

PRESSURE SWITCH (FOR CONTROL)

PRESSURE SWITCH (HIGH PRESSURE)

FERRITE CORE

MAGNETIC CONTACTOR (INDOOR FAN MOTOR)

OVER CURRENT RELAY (INDOOR FAN MOTOR)

FAN MOTOR (INDOOR)

TERMINAL BLOCK

ELECTRONIC EXPANSION VALVE

CRANK CASE HEATER (COMPRESSOR)

SOLENOID VALVE

4-WAY VALVE

FAN MOTOR (OUTDOOR)

PRESSURE SWITCH (LOW PRESSURE)

MAGNETIC CONTACTOR (COMPRESSOR)

FB1,FB2

TH6

TH5

TH4

TH3

TH2

TH1

52F

51F

MF1

TB1,5

LEVCHSV1

21S4

OVER CURRENT RELAY (COMPRESSOR)

LIQUID PIPE TEMP

COMPRESSOR MOTOR

TRANSFORMERTR

MF2MC63H2

63H1

63L

52C

51C

FUSE (15A 250VAC CLASS T)F1,F2

NAMESYMBOL

OFF

SW5

(*2)

OFF

SW2

4321

(*3)

[INDOOR CONTROLLER BOARD]

[OUTDOOR MAIN BOARD]

4321

REMOTE CONTROLLER

SYMBOL

TB6 TERMINAL BLOCK

NAME

MAIN BOARD

OUTDOOR

LED (FOR SERVICE)

AUXILIARY RELAY

SWITCHSW1-5

LED1

X01-X05

FUSE (6.3A 250VAC CLASS F)F01-F04

INDOOR

CONTROLLER BOARD

POWER BOARD

INDOOR

51F

LCD

52F

TH6

TH5

TH4

TB5

REMOTE CONTROLLER

FB2

REMOTE CONTROLLER

BOARD

RETURN AIR

DUCT

SUPPLY AIR

DUCT

TB6

FUSE (6.3A 250VAC CLASS F)F10-F30N.F.BOARD

FUSE (T6.3AL250V)FUSE

ZNR VARISTOR

BOARD

CONTROLLER

INDOOR X4-6

SW1

SW2

SWE

LED1

LED2

LED3

LED (TRANSMISSION<INDOOR.OUTDOOR>)

LED (POWER SUPPLY<REMOTE CONTROLLER>)

LED (POWER SUPPLY)

SWITCH (EMERGENCY OPERATION)

SWITCH (CAPACITY CORD)

SWITCH (MODEL SELECTION)

AUXILIARY RELAY

CN2D

CN90

CN22

CN2L

CNDK

CND

CN32

CN31

CN51

42345

FUSE

ZNR

DC13.1V

1573

X4 X5 X6

LED1

LED2

LED3

X4 X5 X6

21212

213

3654987

312

CN3C

CN20

CN21

CN41

CN29

123412122

4123

(*3)SW2

OFF

FAN

1234

SW1

OFF

SWE

OFF

TAB1

CNSK

CN2S

13.1V

FB1

531

BLACK WHITE RED

CNIN

LED1

SW3

OFF

3456

(*2)SW5

OFF

OUTDOOR MAIN BOARD

OFF

SW2

SW1SW4

OFF

C14

63H2

CN51

CN81

CN27

CN24

CN3D

DC POWER

SUPPLY

CN3N

CN3S

CN34CN28

3131

TRANSMISSION

CIRCIT

CNS3

CH 63L63H1

SV1 21S4

TH3TH2TH1

LEV

X05

X02

X03

X01

CN4

CN3

CN2CN40CNMNTCNVMNT

CNFG

F01

F04

F02

F03

CN20

CNFC1

CN52

CN53

CN25

CN26

X04

CN21

CN22

CN23

52C

51C

1513135131313

531

CNOUT1

MF1

51F

52F

WHITE

BLUE

BLACK

RED

F30

WHITE

F20

F10

753

BLACK

CNOUT2

51C

52C

MF2

RED

TB1

432

L3 N PE

(*1)

POWER SUPPLY

380/400/415V

50HZ

CNPOW

CNFC2

CNFAN

C11

CIRCUIT BREAKER

(FIELD SUPPLY)

PRH-P200MYA : 50A

PRH-P250MYA : 50A

N.F.BOARD

GREEN/YELLOW

F.C.

BOARD

C12

CONTROL BOX

Note: 1. The dotted lines show field wiring.

2. Color of earth wire is yellow and green twisting.

3. Specification subject to change without notice.

4. This motor(*1) includes auto reset type internal thermostat.

5. SW5(*2)[OUTDOOR MAIN BOARD] shows PRH-P250MYA setting.

In case of PRH-P200MYA setting is shown as below.

6. SW2(*3)[INDOOR CONTROLLER BOARD] shows PRH-P250MYA

setting.

In case of PRH-P200MYA setting is shown as below.

7. Emergency operation

If a trouble occurs with either the remote controller or the unit

microcomputer and no other trouble exists, emergency operation for

cooling or heating can be performed by changing the setting of

switch (SWE) "ON" on the indoor controller board.

8. mark is connector.

Caution,

1. To protect compressor and fan motor (indoor) from abnormal

current, over current relays is installed. Therefore, do not change

factory set value of over current relays.

• Models PRH-P200MYA/P250MYA

- 18 -

Page 23

OFF

SW5

(*2)

432

X1,X2,X11,X22

123

532

(*3)

SW2

OFF

(*2)

SW5

OFF

Control box no.2

NAME

TERMINAL BLOCKTB6

SYMBOL

REMOTE CONTROLLER

SYMBOL NAME

F11,F12,F21,F22 FUSE (15A 250VAC CLASS T)

51C1,51C2

52C1,52C2

63L1,63L2

63H11,63H12

63H21,63H22

MC1,MC2

MF21,MF22

TR1,TR2 TRANSFORMER

COMPRESSOR MOTOR

LIQUID PIPE TEMP

OVER CURRENT RELAY (COMPRESSOR)

21S41,21S42

SV11,SV12

CH1,CH2

LEV1,LEV2

TB1,TB5,TB11,TB21

MF1

51F

52F

TH1-1,TH1-2

TH2-1,TH2-2

TH3-1,TH3-2

TH4-1,TH4-2

TH5-1,TH5-2

TH6-1,TH6-2CRFB11,FB12,FB21,FB22

MAGNETIC CONTACTOR (COMPRESSOR)

PRESSURE SWITCH (LOW PRESSURE)

FAN MOTOR (OUTDOOR)

4-WAY VALVE

SOLENOID VALVE

CRANK CASE HEATER (COMPRESSOR)

ELECTRONIC EXPANSION VALVE

TERMINAL BLOCK

FAN MOTOR (INDOOR)

OVER CURRENT RELAY (INDOOR FAN MOTOR)

MAGNETIC CONTACTOR (INDOOR FAN MOTOR)

FERRITE CORE

PRESSURE SWITCH (HIGH PRESSURE)

PRESSURE SWITCH (FOR CONTROL)

THERMISTOR

DISCHARGE TEMP

COND/EVA TEMP

ROOM TEMP

LIQUID PIPE TEMP

COND/EVA TEMP

SURGE KILLER

OUTDOOR

INDOOR

F01-F04 FUSE (6.3A 250VAC CLASS F)

X01-X05

LED1

SW1-5 SWITCH

AUXILIARY RELAY

LED (FOR SERVICE)

OUTDOOR

MAIN BOARD

SW2

(*3)

SW1

INDOOR

CONTROLLER BOARD

INDOOR

CONTROLLER BOARD

FB22

INDOOR

POWER BOARD

CN2S

13.1V

CNSK

TAB1

CN2L

CN22

12 12 123456789

CN90

CN51

CN2D

DC13.1V

CN3C

OFF ON

SWE

OFF ON

123 12

CN32

LED1

CN20

CN41

CN29

CN21

1234 211

CN31

X6X5X4

135

LED3LED2

FAN

CNDK

ZNR

FUSE

CND

LED3LED2

FAN

CN3C

CNDK

ZNR

FUSE

CND

TAB1

13.1V

CNSK

CN2S

3 1

CN32

123

CN90

CN2L

CN22

CN31

CN41

CN29

CN21

CN2D

DC13.1V

CN51

CN20

234 2121

SW1

OFF ON

(*3)

SW2

OFF ON

SWE

OFF ON

357

12 12 321 456789

LED1

C28

C18

C28

51F

52F

F22

F12

TH4-2

TH5-2

TH6-2

FB12

REMOTE CONTROLLER

BOARD

TB6

LCD

F21

F11

SUPPLY AIR

DUCT

RETURN AIR

DUCT

FB21

INDOOR

POWER BOARD

REMOTE

CONTROLLER

FB11

TB5

TH4-1

TH5-1

TH6-1

N.F.BOARD F10-F30 FUSE (6.3A 250VAC CLASS F)

FUSE FUSE (T6.3AL250V)

VARISTORZNR

AUXILIARY RELAY

SWITCH (MODEL SELECTION)

SWITCH (CAPACITY CORD)

SWITCH (EMERGENCY OPERATION)

LED (POWER SUPPLY)

LED (POWER SUPPLY<REMOTE CONTROLLER>)

LED (TRANSMISSION<INDOOR

OUTDOOR>)

LED3

LED2

LED1

SWE

SW2

SW1

X4-6INDOOR

CONTROLLER

BOARD

BLACK

WHITE

RED

C19

X22

GREEN/YELLOW

BLUE

BLACK

WHITE

RED

L1L2L3

X11

L3L2L1

65432

23456

TB1

POWER SUPPLY

380/400/415V

50HZ

L1L2L3

63H22

LED1

SW3

(*2)SW5

OUTDOOR MAIN BOARD

OFF ON

SW2

TR2

SW1

SW4

OFF

C14

CN51

CN3D

DC POWER

SUPPLY

CN34

CN28

TRANSMISSION

CIRCUIT

CNS3

CH2

63L2

63H12

21S42

TH3-2

LEV2

X05

X02

X03

X01

CN4

CNMNT

CNVMNT

CNFG

F01

CN20

CNFC1

CN52

X04

52C2

51C2

212

TH2-2

TH1-2

CN3

CN2

CN40

CN3S CN3N CN24 CN27 CN81

F04 F02 F03

357

L2NL1

6151

CN53CN25

3131531313131

CN26CN21CN22CN23

OFF

X22

12345

432

52C2

SV12

MF22

(*1)

C12

C11

CNFC2

CNFAN

F.C.

BOARD

CNOUT1

CNOUT2

N.F.BOARD

F20

F30

F10

7513

CNIN

CNPOW

MC2

BLACK

RED

WHITE

51C2

52C2

BLUE

BLACK

RED

WHITE

TB21

GREEN/YELLOW

RED

WHITE

BLACK

RED

WHITE

BLACK

WHITE

BLACK

753

MF21

123

65432

X11

OFF ON

CN23 CN22 CN21 CN26

1313131351313

CN25 CN53

151 6

L1 N L2

753

F03F02F04

CN81CN27CN24CN3NCN3S

CN40

CN2

CN3

TH1-1

TH2-1

121

CIRCUIT BREAKER

(FIELD SUPPLY)

PRH-P400MYA: 63A

PRH-P500MYA: 70A

C12

F.C.

BOARD

N.F.BOARD

C11

CNFAN

CNFC2

CNPOW

(*1)

TB11

52C1

51C1

MC1

CNOUT2

RED

F10

F20

F30

BLUE

52F

51F

MF1

CNOUT1

51C1

52C1

X04

CN52

CNFC1

CN20

F01

CNFG

CNVMNT

CNMNT

CN4

X01

X03

X02

X05

LEV1

TH3-1

21S41

SV11

63H11

63L1

CH1

CNS3

TRANSMISSION

CIRCUIT

CN28

CN34

DC POWER

SUPPLY

CN3D

CN51

63H21

C14

OFF

SW4

SW1

TR1

SW2

OFF

OUTDOOR MAIN BOARD

(*2)SW5

SW3

LED1

CNIN

CONTROL BOX NO.2CONTROL BOX NO.1

Control box no.1

Note: 1. The dotted lines show field wiring.

2. Color of earth wire is yellow and green twisting.

3. Specification subject to change without notice.

4. This motor(*1) includes auto reset type internal

thermostat.

5. SW5(*2)[OUTDOOR MAIN BOARD] shows PRH-

P500MYA setting.

In case of PRH-P400MYA setting is shown as below.

6. SW2(*3)[INDOOR CONTROLLER BOARD] shows

PRH-P500MYA setting.

In case of PRH-P400MYA setting is shown as below.

7. Emergency operation

If a trouble occurs with either the remote controller or

the unit microcomputer and no other trouble exists,

emergency operation for cooling or heating can be

performed by changing the setting of switch (SWE)

"ON" on the indoor controller board.

8. mark is connector.

Caution,

1. To protect compressor and fan motor (indoor) from

abnormal current, over current relays is installed.

Therefore, do not change factory set value of over

current relays.

[OUTDOOR MAIN

BOARD]

[INDOOR CONTROLLER BOARD]

[OUTDOOR MAIN

BOARD]

• Models PRH-P400MYA/P500MYA

- 19 -

Page 24

- 20 -

(2) PRH-P10MYA/P250MYA

(1) PRH-P8MYA/P200MYA

[1] Standard Operation Data

Technical Data to Meet LVD

380 400 415 380 400 415

50 50 50 50 50 50

27/19 27/19 27/19 20/– 20/– 20/–

35/– 35/– 35/– 7/6 7/6 7/6

7.7 7.7 7.7 7.7 7.7 7.7

14.7 14.7 14.7 14.5 14.5 14.5

11.9 11.9 11.9 11.7 11.7 11.7

1.1 1.1 1.1 1.1 1.1 1.1

1.7 1.7 1.7 1.7 1.7 1.7

2.25 2.25 2.25 1.72 1.72 1.72

0.56 0.56 0.56 0.38 0.38 0.38

77 77 77 66 66 66

10 10 10 -1 -1 -1

48 48 48 0 0 0

33 33 33 28 28 28

Operating condition

Operating condition Cooling Heating

Voltage V

Power source frequency Hz

Indoor air condition (DB/WB) °C

Outdoor air condition (DB/WB) °C

Refrigerant charge kg

Rated current A

Compressor current A

Rated currentO/D FAN A

Rated current A

Discharge pressure MPa

Suction pressure MPa

Discharge refrigerant temperature °C

Suction refrigerant temperature °C

Liquid pipe temperature

(at piping sensor)

°C

Compressor shell bottom temperature °C

Total

I/D FAN

Refrigerant circuit

Electrical characteristics

380 400 415 380 400 415

50 50 50 50 50 50

27/19 27/19 27/19 20/– 20/– 20/–

35/– 35/– 35/– 7/6 7/6 7/6

8.2 8.2 8.2 8.2 8.2 8.2

18.8 18.8 18.8 18.2 18.2 18.2

14.9 14.9 14.9 14.3 14.3 14.3

1.1 1.1 1.1 1.1 1.1 1.1

2.8 2.8 2.8 2.8 2.8 2.8

2.31 2.31 2.31 1.83 1.83 1.83

0.55 0.55 0.55 0.37 0.37 0.37

78 78 78 70 70 70

999–1 –1 –1

48 48 48 3 3 3

32 32 32 25 25 25

Operating condition

Operating condition Cooling Heating

Voltage V

Power source frequency Hz

Indoor air condition (DB/WB) °C

Outdoor air condition (DB/WB) °C

Refrigerant charge kg

Rated current A

Compressor current A

Rated current A

Discharge pressure MPa

Suction pressure MPa

Discharge refrigerant temperature °C

Suction refrigerant temperature °C

Liquid pipe temperature

(at piping sensor)

°C

Compressor shell bottom temperature °C

Total

I/D FAN

O/D FAN

Refrigerant circuit

Electrical characteristics

[2] Skeleton of Transmission Line Connection

(1) System

Unit

Remote controller

Transmission line

Page 25

- 21 -

✻1: For each refrigerant circuit

(4) PRH-P20MYA/P500MYA

(3) PRH-P16MYA/P400MYA

380 400 415 380 400 415

50 50 50 50 50 50

27/19 27/19 27/19 20/– 20/– 20/–

35/– 35/– 35/– 7/6 7/6 7/6

7.7 7.7 7.7 7.7 7.7 7.7

Operating condition

Operating condition Cooling Heating

Voltage V

Power source frequency Hz

Indoor air condition (DB/WB) °C

Outdoor air condition (DB/WB) °C

Refrigerant charge

✻1kg

Rated current A

Compressor current A

Rated currentO/D FAN A

Rated current A

Discharge pressure MPa

Suction pressure MPa

Discharge refrigerant temperature °C

Suction refrigerant temperature °C

Liquid pipe temperature

(at piping sensor)

°C

Compressor shell bottom temperature °C

Total

I/D FAN

Refrigerant circuit

Electrical characteristics

380 400 415 380 400 415

50 50 50 50 50 50

27/19 27/19 27/19 20/– 20/– 20/–

35/– 35/– 35/– 7/6 7/6 7/6

8.2 8.2 8.2 8.2 8.2 8.2

29.6

23.8

2.2

3.6

2.27

0.52

29.2

23.4

2.2

3.6

1.80

0.40

36.6

29.8

2.2

4.6

2.28

0.52

35.4

28.6

2.2

4.6

1.80

0.40

29.6

23.8

2.2

3.6

2.27

0.52

29.6

23.8

2.2

3.6

2.27

0.52

29.2

23.4

2.2

3.6

1.80

0.40

36.6

29.8

2.2

4.6

2.28

0.52

35.4

28.6

2.2

4.6

1.80

0.40

29.2

23.4

2.2

3.6

1.80

0.40

36.6

29.8

2.2

4.6

2.28

0.52

35.4

28.6

2.2

4.6

1.80

0.40

Operating condition

Operating condition Cooling Heating

Voltage V

Power source frequency Hz

Indoor air condition (DB/WB) °C

Outdoor air condition (DB/WB) °C

Refrigerant charge

✻1kg

Rated current A

Compressor current A

Rated current A

Discharge pressure MPa

Suction pressure MPa

Discharge refrigerant temperature °C

Suction refrigerant temperature °C

Liquid pipe temperature

(at piping sensor)

°C

Compressor shell bottom temperature °C

Total

I/D FAN

O/D FAN

Refrigerant circuit

Electrical characteristics

Page 26

[4] Reduction Ratio by Frosting

6 1.0

4 0.98

2 0.88

0 0.85

–2 0.86

–4 0.89

–6 0.92

–8 0.92

–10 0.92

Outdoor unit inlet wet bulb temperature

Heating capacity reduction ratio

(°CWB)

[2] Cooling Capacity Curves

[3] Heating Capacity Curves

Indoor inlet air wet

bulb temp. <˚CWB>

inlet air wet

bulb temp. <˚CWB>

Indoor

Indoor inlet air dry

bulb

temp. <˚CDB>

Indoor inlet

air dry

bulb temp. <˚CDB>

Outdoor

air

temperature

<˚CWB>

Outdoor air temperature

<˚CWB>

Outdoor air temperature

<˚CDB>

Outdoor

air

temperature

<˚CDB>

- 22 -

1.4

1.2

Capacity ratio

0.8

0.6

-5 -3 -1 1 3 5 7 9 1113151719212325272931333537394143

1.4

1.2

1.22

22 20

39 41 43

18 16

1.1

Input ratio

0.9

0.7

-5 -3 -1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37

1.4 15 20 25

1.2

Capacity ratio

0.8

0.6

-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18

Input ratio

0.8

0.6

-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18

Page 27

- 23 -

Capacity/Input ratio

Heating

Airflow rate (m3/min)

Capacity/Input ratio

Cooling

Airflow rate (m3/min)

Capacity/Input ratio

Airflow rate (m3/min)

Cooling

Capacity/Input ratio

Heating

Airflow rate (m3/min)

[5] Capacity/Input Ratio against Changes in Room Airflow Rate

• Model PRH-P8MYA/P200MYA

• Model PRH-P10MYA/P250MYA

0.9

1.1

55 65 75 85

Capacity Input

1.1

0.9

55 65 75 85

Capacity Input

0.9

1.1

70 80 90 100 110

Capacity Input

0.9

1.1

70 80 90 100 110

Capacity Input

Capacity

Input

Capacity

Input

Capacity

Input

Capacity

Input

Page 28

- 24 -

0.9

1.1

112 120 130 140 150 160 168

0.9

1.1

112 120 130 140 150 160 168

0.9

1.1

144 150 160 170 180 190 200 210 216

0.9

1.1

144 150 160 170 180 190 200 210 216

Capacity/Input ratio

Airflow rate (m3/min)

Capacity/Input ratio

Airflow rate (m3/min)

Capacity/Input ratio

Airflow rate (m3/min)

Capacity/Input ratio

Airflow rate (m3/min)

Capacity

Input

Capacity

Input

Capacity

Input

Capacity

Input

• Model PRH-P16MYA/P400MYA

• Model PRH-P20MYA/P500MYA

Capacity Input

Cooling

Heating

Capacity Input

Heating

Cooling

Page 29

- 25 -

Bypass factor

Airflow rate (m3/min)

0.30

0.25

0.20

0.15

0.10

PRH-P8MYA/P200MYA

PRH-P10MYA/P250MYA

Bypass factor

Airflow rate (m3/min)

70 80 90 100 11060 65 70 75 80 85

0.30

0.25

0.20

0.15

0.10

PRH-P16MYA/P400MYA PRH-P20MYA/P500MYA

[6] Bypass Factor Curves

[7] Cooling Sensible Heating Capacity Table

(1) PRH-P8MYA/P200MYA (Airflow rate 70m3/min)

Outdoor

temp.

(°C)

Indoor inlet air temperature (DB/WB°C)

18100

17500

16900

16200

15300

14800

SHC

14400

14100

13900

13600

13200

12900

19300

18700

18100

17400

16600

16000

SHC

14300

14100

13800

13500

13200

12900

20000

19500

18900

18000

17400

16900

SHC

15300

15100

14800

14500

14200

14000

20800

20300

19700

19000

18200

17700

SHC

15300

15100

14900

14600

14300

14100

21900

21500

20900

20200

19500

19000

SHC

(unit : kcal/h)

15000

14900

14700

14400

14200

14000

23/16 25/18 27/19 28/20 30/22

112 120 130 140 150 160 168

Bypass factor

0.2

0.15

0.1

0.05

Airflow rate (m3/min)

144 150 160 170 180 190 216200 210

Bypass factor

0.1

0.15

0.2

0.3

0.25

Airflow rate (m3/min)

Page 30

- 26 -

(3) PRH-P16MYA/P400MYA (Airflow rate 140m3/min)

(4) PRH-P20MYA/P500MYA (Airflow rate 180m

/min)

(2) PRH-P10MYA/P250MYA (Airflow rate 90m3/min)

Outdoor

temp.

(°C)

Indoor inlet air temperature (DB/WB°C)

36200

35000

33800

32400

30600

29600

SHC

29500

28900

28400

27800

27000

26500

38600

37400

36200

34800

33200

32000

SHC

29300

28700

28200

27700

27000

26500

40000

39000

37800

36000

34800

33800

SHC

31300

30900

30400

29700

29200

28800

41600

40600

39400

38000

36400

35400

SHC

31300

30900

30400

29900

29300

28900

43800

43000

41800

40400

39000

38000

SHC

(unit : kcal/h)

30800

30500

30000

29500

29000

28700

23/16 25/18 27/19 28/20 30/22

Outdoor

temp.

(°C)

Indoor inlet air temperature (DB/WB°

45000

43600

42000

40200

38200

36800

SHC

36000

35300

34600

33800

32900

32300

48000

46600

45000

43200

41200

40000

SHC

35700

35100

34500

33700

32900

32400

49800

48600

47000

44800

43200

42000

SHC

38200

37700

37100

36200

35500

35000

51600

50400

49000

47200

45400

44000

SHC

38100

37600

37100

36400

35700

35100

54600

53400

52000

50400

48400

47200

SHC

37600

37100

36600

36000

35300

34900

23/16 25/18 27/19 28/20 30/22

(unit : kcal/h)

Outdoor

temp.

(°C)

Indoor inlet air temperature (DB/WB°

22500

21800

21000

20100

19100

18400

SHC

18000

17700

17300

16900

16500

16200

24000

23300

22500

21600

20600

20000

SHC

17900

17600

17200

16900

16400

16200

24900

24300

23500

22400

21600

21000

SHC

19100

18900

18500

18100

17800

17500

25800

25200

24500

23600

22700

22000

SHC

19100

18800

18500

18200

17800

17600

27300

26700

26000

25200

24200

23600

SHC

18800

18600

18300

18000

17700

17400

23/16 25/18 27/19 28/20 30/22

Page 31

- 27 -

[8] Fan Performance

PRH-P8MYA/P200MYA

PRH-P10MYA/P250MYA

Air flow

85 (CMM)

(L/S)

Total static pressure (Pa)

1.1kW

1.5kW

2.2kW

1.5kW

* : factory pre setting ESP = 100 Pa

Air flow

* : factory pre setting ESP = 100 Pa

110

1830

(CMM) (L/S)

105100

1670

9590

1500

8580

1330

7570

1170

1330

7570

1170

6560

1000

800

700

600

500

400

300

200

100

200

300

400

500

600

Total static pressure (Pa)

Fan speed <rpm>

internal static pressure

900

1000

1100

1200

1300

800

900

1000

1100

1200

1300

1400

1500

1400

1500

1600

1700

Page 32

- 28 -

PRH-P20MYA/P500MYA

PRH-P16MYA/P400MYA

3.7kW

2.2kW

5.5kW

3.7kW

Air flow

* : factory pre setting ESP = 200 Pa

Air flow

* : factory pre setting ESP = 200 Pa

(CMM) (L/S)

Total static pressure (Pa) Total static pressure (Pa)

100

200

300

400

500

600

700

800

900

1000

110 120 130 140 150 160 170

100

200

300

400

500

600

700

800

900

1000

140 150 160 170 180 190 200 210 220

1830 2340 2830

2340 3000 3670

Fan speed <rpm>

internal static pressure

600

700

800

900

1000

1100

1200

1300

700

800

900

1000

1100

1200

1300

Page 33

- 29 -

factory pre setting

< fig. in the direction of the motor axis>

PRH-P8MYA/P200MYA

PRH-P10MYA/P250MYA

CMM

L/S rpm mm inch mm inch inch

rpm mm inch mm inch inch

Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles)

150

Total SP (Pa)

Air flow

250

350

450

55 920 788

101.6 4

177.8 7

B57(red)

1.1 4

1059

114.3

4.5

152.4 6

B56(red)

1.1 4

1190

127

152.4 6

B57(red)

1.1 4

1450

127

B55(red)

1.5 4

1000

788

101.6 4

177.8 7

B57(red)

1.1 4

1059

114.3

4.5

152.4 6

B56(red)

1.1 4

1190

127

152.4 6

B57(red)

1.1 4

1450

127

B55(red)

1.5 4

1170

898

114.3

4.5

177.8 7

B58(red)

1.1 4

1059

114.3

4.5

152.4 6

B56(red)

1.1 4

1190

127

152.4 6

B57(red)

1.1 4

1450

127

B55(red)

1.5 4

1330

898

114.3

4.5

177.8 7

B58(red)

1.1 4

1059

114.3

4.5

152.4 6

B56(red)

1.1 4

1291

114.3

4.5

127

B55(red)

1.5 4

1450

127

B55(red)

1.5 4

1420

898

114.3

4.5

177.8 7

B58(red)

1.1 4

1059

114.3

4.5

152.4 6

B56(red)

1.1 4

1291

114.3

4.5

127

B55(red)

1.5 4

CMM

L/S rpm mm inch mm inch inch

rpm mm inch mm inch inch

Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles)

rpm mm inch mm inch inch

Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles)

200

Total SP (Pa)

Air flow

300

400

500

600

70 1170 1008

127

177.8 7

B58(red)

1.5 4

1133

101.6 4

127

B54(red)

1.5 4

1307

127

139.7

5.5

B56(red)

1.5 4

1450

127

B55(red)

2.2 4

1609

139.7

5.5

127

B56(red)

2.2 4

80 1330 1008

127

177.8 7

B58(red)

1.5 4

1190

127

152.4 6

B57(red)

1.5 4

1320

139.7

5.5

152.4 6

B58(red)

1.5 4

1450

127

B55(red)

2.2 4

1609

139.7

5.5

127

B56(red)

2.2 4

90 1500 1008

127

177.8 7

B58(red)

1.5 4

1190

127

152.4 6

B57(red)

1.5 4

1320

139.7

5.5

152.4 6

B58(red)

1.5 4

1450

127

B55(red)

2.2 4

1609

139.7

5.5

127

B56(red)

2.2 4

100 1670 1008

127

177.8 7

B58(red)

1.5 4

1190

127

152.4 6

B57(red)

1.5 4

1320

139.7

5.5

152.4 6

B58(red)

2.2 4

1450

127

B55(red)

2.2 4

110 1830 1008

127

177.8 7

B58(red)

1.5 4

1190

127

152.4 6

B57(red)

1.5 4

1320

139.7

5.5

152.4 6

B58(red)

2.2 4

1450

127

B55(red)

2.2 4

Page 34

- 30 -

factory pre setting

< fig. in the direction of the motor axis>

PRH-P16MYA/P400MYA

CMM

L/S rpm mm inch mm inch inch

rpm mm inch mm inch inch

Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles)

rpm mm inch mm inch inch

Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles)

250

Total SP (Pa)

Air flow

350

450

550

650

112

1870

692 127

254

B46(red)

2.2 4

844

152.4 6

254

B48(red)

2.2 4

875 127

203.2 8

B43(red)

2.2 4

1067

152.4 6

203.2 8

B44(red)

3.7 4

1119

139.7

5.5

177.8 7

B42(red)

3.7 4

120

2000

692 127

254

B46(red)

2.2 4

844

152.4 6

254

B48(red)

2.2 4

875 127

203.2 8

B43(red)

2.2 4

1067

152.4 6

203.2 8

B44(red)

3.7 4

1119

139.7

5.5

177.8 7

B42(red)

3.7 4

140

2330

692 127

254

B46(red)

2.2 4

844

152.4 6

254

B48(red)

2.2 4

875 127

203.2 8

B43(red)

2.2 4

1067

152.4 6

203.2 8

B44(red)

3.7 4

160

2670

692 127

254

B46(red)

2.2 4

844

152.4 6

254

B48(red)

2.2 4

875 127

203.2 8

B43(red)

3.7 4

1067

152.4 6

203.2 8

B44(red)

3.7 4

168

2800

692 127

254

B46(red)

2.2 4

844

152.4 6

254

B48(red)

3.7 4

875 127

203.2 8

B43(red)

3.7 4

1067

152.4 6

203.2 8

B44(red)

3.7 4

Page 35

- 31 -

factory pre setting

< fig. in the direction of the motor axis>

PRH-P20MYA/P500MYA

CMM

L/S rpm mm inch mm inch inch

rpm mm inch mm inch inch

Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles)

rpm mm inch mm inch inch

Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles) Fan speed

(Motor side)

Pulley size

(Fan side)

Pulley size

Belt size Motor (poles)

300

Total SP (Pa)

Air flow

400

500

600

700

144

2400

799

88.9

3.5

152.4 6

B37(red)

3.7 4

875 127

203.2 8

B43(red)

3.7 4

1008

127

177.8 7

B41(red)

3.7 4

1119

139.7

5.5

177.8 7

B42(red)

5.5 4

1190

127

152.4 6

B40(red)

5.5 4

160

2670

799

88.9

3.5

152.4 6

B37(red)

3.7 4

875 127

203.2 8

B43(red)

3.7 4

1008

127

177.8 7

B41(red)

3.7 4

1119

139.7

5.5

177.8 7

B42(red)

5.5 4

1190

127

152.4 6

B40(red)

5.5 4

180

3000

799

88.9

3.5

152.4 6

B37(red)

3.7 4

875 127

203.2 8

B43(red)

3.7 4

1008

127

177.8 7

B41(red)

5.5 4

1119

139.7

5.5

177.8 7

B42(red)

5.5 4

1190

127

152.4 6

B40(red)

5.5 4

200

3330

799

88.9

3.5

152.4 6

B37(red)

3.7 4

875 127

203.2 8

B43(red)

3.7 4

1008

127

177.8 7

B41(red)

5.5 4

1119

139.7

5.5

177.8 7

B42(red)

5.5 4

1190

127

152.4 6

B40(red)

5.5 4

216

3600

799

88.9

3.5

152.4 6

B37(red)

3.7 4

875 127

203.2 8

B43(red)

3.7 4

1008

127

177.8 7

B41(red)

5.5 4

1119

139.7

5.5

177.8 7

B42(red)

5.5 4

Page 36

- 32 -

(1) Shape of belt groove

(2) Shape of motor pulley boss

r2r

øP.C

16.5mm

B type

11.0mm

40˚

Sectional plan of V-belt

Shape of

V-belt

Nominal

Dia. øP.Ca(˚

)

L0WKK0ef r1r

V-belt

thickness

(Reference)

Over 125

Under 160

Over 160

Under 200

Over 200

15.86

16.07

16.29

12.5 5.5 9.5 19.0 12.5 0.2~0.5 0.5~1.0 1~2 11

CBA

MOTOR

CAPACITY

(kW)

1.1, 1.5

5.5

+ 0.028 + 0.007

+ 0.128 + 0.007

+ 0.128 + 0.009

+0.018

- 0.018

+0.028

- 0.013

Pulley outside dimensions are shown below: (Unit : mm)

2.2, 3.7

+ 0.028 + 0.007

+ 0.128 + 0.007

+0.028

- 0.013

Page 37

[9] Center of Gravity

PRH-P8MYA/P200MYA

PRH-P10MYA/P250MYA

407

412

Item

Model name

Net weight

(kg)

(1) Caution for Lifting

Center of gravity

Inclining to the front side of unit.

Protection pad

Use pads properly to prevent the scratching of external panel caused by contact with sling.

Indicates the unit front side.

Fasten here properly to prevent unit from slipping off from the sling at lifting.

Hanger rope (Over 8m x 2)

Must be durable against unit weight. For the lifting of unit for movement,

Please be sure to suspend at four points,

and not to give any shock to unit.

Never apply two-point lifting as it is dangerous.

101cm

33cm

49cm

Below 40

Name plate

Service panel

Compressor position

Suspending spot 2-point,front and rear.

Lift unit slowly by suspending rope uniformly so that the rope will not slip off or unit will not incline seriously.

Be careful that unit may fall down if the rope is not in a proper position as the center of gravity of unit is being inclined.

Warning

- 33 -

Page 38

- 34 -

PRH-P16MYA/P400MYA

PRH-P20MYA/P500MYA

857

872

Item

Model name

Net weight

(kg)

Lift unit slowly by suspending rope uniformly so that the rope will not slip off or unit will not incline seriously.

Be careful that unit may fall down if the rope is not in a proper position as the center of gravity of unit is being inclined.

Warning

Suspending spot

Protection pad

Name plate

Indicates the unit front side.

Hanger rope (Over 14m

x 2)

Service panel

Center of gravity

2-point,front and rear

Must be durable against unit weight. For the lifting of unit for movement,

Please be sure to suspend at four points,

and not to give any shock to unit.

Never apply two-point lifting as it is dangerous.

Use pads properly to prevent the scratching of external panel caused by contact with sling.

Fasten here properly to prevent unit from slipping off from the sling at lifting.

Below 40˚

107cm

105cm

51cm

Page 39

[10] NC Curve

Measurement condition

Measured point

Measurement condition

Measured point

Approximate minimum audible limit on continuous noise

63 125 250 500 1000 2000 4000 8000

Approximate minimum audible limit on continuous noise

OCTAVE BAND CENTER FREQUENCIES <Hz>

OCTAVE BAND

PRESSURE

LEVEL <dB> 0dB = 20µ

OCTAVE BAND CENTER FREQUENCIES <Hz>

OCT

AVE BAND

PRESSURE LEVEL

<dB>

0dB = 20

µPa

PRH-P8MYA/P200MYA

PRH-P10MYA/P250MYA

(dB)

NC20

NC60

NC70

NC50

NC40

NC30

NC20

NC30

NC60

NC50

NC40

A characteristics

8000Hz

4000Hz

2000Hz

1000Hz

500Hz

250Hz

125Hz

63Hz

A characteristics

8000Hz

4000Hz

2000Hz

1000Hz

500Hz

250Hz

125Hz

63Hz

- 35 -

Page 40

- 36 -

Measurement condition

Measured point

Measurement condition

Measured point

Approximate minimum audible limit on continuous noise

63 125 250 500 1000 2000 4000 8000

Approximate minimum audible limit on continuous noise

OCTAVE BAND CENTER FREQUENCIES <Hz>

OCTAVE BAND

PRESSURE

LEVEL <dB> 0dB = 20µ

OCTAVE BAND CENTER FREQUENCIES <Hz>

OCT

AVE BAND

PRESSURE LEVEL

<dB>

0dB = 20

µPa

(dB)

PRH-P20MYA/P500MYA

PRH-P16MYA/P400MYA

NC20

NC60

NC70

NC50

NC40

NC30

NC20

NC30

NC60

NC50

NC40

A characteristics

8000Hz

4000Hz

2000Hz

1000Hz

500Hz

250Hz

125Hz

63Hz

A characteristics

8000Hz

4000Hz

2000Hz

1000Hz

500Hz

250Hz

125Hz

63Hz

Page 41

- 37 -

[1] Appearance of Equipment

A SERVICE DATA

(with cover removed)

Propeller fan Fan guard

Outdoor-side heat exchanger

Outdoor-side fan motor

Check joint (high pressure)

Check joint (low pressure)

Electrical parts box

Page 42

- 38 -

(with cover removed)

•

PRH-P8MYA/P10MYA (with Main Board Panel removed) PRH-P200MYA/P250MYA (with Main Board Panel removed)

Outdoor-side controller board

Outdoor-side F.C. board

Outdoor-side N.F. board

Transformer Magnetic contactor for Indoor-side

fan motor <52F>

Terminal block (remote controller transmission line)

Terminal block (power)

Magnetic contactor for compressor <52C>

Overcurrent relay <51C>

Overcurrent relay <51F>

Indoor-side power board

Indoor-side controller board

Page 43

- 39 -

•

PRH-P16MYA/P20MYA (with Main Board Panel removed) PRH-P400MYA/P500MYA (with Main Board Panel removed)

No.1 side

•

PRH-P16MYA/P20MYA (with Main Board Panel removed) PRH-P400MYA/P500MYA (with Main Board Panel removed)

No.2 side

Auxiliary relay <X2>

Outdoor-side F.C. board

Auxiliary relay <X11>

Auxiliary relay <X22>

Transformer <TR2>

Overcurrent relay <51C2>

Magnetic contactor for compressor <52C2>

Transformer <TR1>

Magnetic contactor for compressor <52C1>

Overcurrent relay <51C1>

Terminal block <TB11>

Terminal block (power)

Terminal block <TB21>

Outdoor-side F.C. board

Auxiliary relay <X1>

Overcurrent relay <51F>

Outdoor-side N.F. board

Magnetic contactor for fan motor <52F>

Terminal block (remote controller transmission line)

Page 44

- 40 -

(Detail of outdoor-side machine room)

(Detail of indoor-side machine room)

Thermistor <Condenser/evaporator temp.> TH3

Thermistor <Discharge temp.> TH2

Thermistor <Liquid temp.> TH1 Compressor

(At the back of the heat exchanger panel (header cover). When this screw is removed, the header cover is removed.)

Solenoid valve (SV1)

Electric expansion valve (LEV)

Drain connection (R1)

Drain pan

Motor pulley

Fan pulley

Fan casing

Sirroco fan

Accumulator

Pressure switch (63L)

Pressure switch (63H2)

Pressure switch (63H1)

4-way valve

Indoor-side heat exchanger

Indoor-side fan motor

Velt

Page 45

- 41 -

Outdoor-side heat exchanger

Electric expansion valve

Capillary tube

Indoor-side heat exchanger

Strainer

Accumulator

High pressure switch (Protection)

Low pressure switch (Protection)

Service port

Muffler

Compressor

Solenoid valve

Strainer

Service port

High pressure switch (Control)

Strainer

[2] Refrigerant Circuit

Cooling

✻There are 2 circuits

for PRH-P16MYA

P20MYA P400MYA P500MYA

operation

Heating operation

[3] Refrigerant Charge

[4] Operation Range

-5 43

Outdoor air temperature (°CDB)

Indoor air temperature (

°CWB)

–12 18

Outdoor air temperature (°CWB)

Indoor air temperature (

°CDB)

Amount of infusion of coolant at ex-factory

R407C 7.7 kg

R407C 8.2 kg x 2

Model

PRH-P8MYA/P200MYA

PRH-P20MYA/P500MYA

R407C 8.2 kgPRH-P10MYA/P250MYA

R407C 7.7 kg x 2PRH-P16MYA/P400MYA

Cooling Heating

Page 46

- 42 -

[5] Safety & Control Devices

Compressor over current relay

High pressure switch

Indoor-side fan motor over current relay

Fuse (Outdoor-side controller board) (N.F. board) (F.C. board)

Fuse

51C

51F

F1, F2

PRH-P20MYA/

P500MYA

22A 27A

PRH-P10MYA/

P250MYA

27A

PRH-P16MYA/

P400MYA

22A

2.8A 7.5A3.6A 5.0A

63H1 3.3MPa OFF

6.3A

Fuse (Indoor-side power board) F1 4A

15A

ITEM

Outdoor-side fan motor internal thermostat

49F 135 ˚C OFF

PRH-P8MYA/

P200MYA

Page 47

- 43 -

3N~ 380/400/415 V 50 Hz

Unit

Remote

controller

Fuse

LED2 LED3

Fuse

DC5V for

microcomputer

DC/DC

converter

Fuse

Electrical

terminal block

Remote controller

terminal block

Remote controller

terminal block

Semiconductor relay

Over current relay

Magnetic

contractor

4-way valve, LEV, solenoid valve, crankcase heater

Key input

LCD

Send/receive

Communication

circuit

Communication

circuit

Transformer

Fan control

Compressor

Outdoor-side fan

Indoor-side fan

Current

detection

<Power>

<Indoor-side/outdoor-side controller boards communication>

LED1

DC5V

12V

[1] Composition of Control

Function block diagram

✻1: For each refrigerant circuit

B CONTROL

Page 48

- 44 -

[2] Control specifications

(1) Protection functions

1) The main protection devices for the unit are: a) High pressure protection (63H1) b) Compressor overcurrent protection (51C) c) Liquid temp thermistor trouble (TH1) d) Discharge temperature protection (TH2 ≥118 °C) e) Discharge temp thermistor trouble (TH2) f) Condenser/evaporater temp thermistor trouble (TH3) g) Low

h) Inlet temp thermistor trouble (TH4)

i) Liquid temp thermistor trouble (TH5) j) Condenser/evaporater temp thermistor trouble (TH6)

pressure protection (63L)

2) When tripping of a detection device is sensed, the check mode is entered and the compressor is stopped. (After 3 minutes, the compressor restarts.) Thereafter, the compressor is stopped when the specified number of check modes or greater is sensed within the check time.

3) Check mode is released by stopping operation, changing the operation mode, or check mode time up. A check mode is also released by stopping of operation by remote controller.

4) Detected check mode history (newest) and abnormality history (last 2 times) are memorized and are displayed on the segment by circuit board DIP switch setting. The operation mode when the newest abnormality was generated, the thermistor temperature (TH1,2,3), and the thermostat ON time can also be displayed.

Protection functions

a) High pressure protection

(63H1)

b) Compressor overcurrent

protection (51C)

c) Liquid temp thermistor

trouble (TH1)

d) Discharge temperature

protection (TH2

118 °C)

e) Discharge temp ther-

mistor trouble (TH2)

f) Condenser/evaporater

temp thermistor trouble (TH3)

g) Low pressure protection

(63L)

Operation value

3.3 MPa

P8MYA/P200MYA

: 22 A

P10MYA/P250MYA

: 27 A

Less than –39 °C or greater than 88 °C

Less than –40 °C or greater than 90 °C

Greater than 118 °C

Less than 0 °C or greater than 216 °C

Less than –39 °C or greater than 88 °C

0 MPa

Detection condition

Compressor operating

Compressor operating except for 10 minutes at end of defrosting and 7 minutes while compressor starting

Compressor operating

Compressor operating except for 10 minutes at end of defrosting and 5 minutes while compressor starting Compressor operating except for 10 minutes at end of defrosting and 7 minutes while compressor starting Compressor operating except for defrosting, 10 minutes at end of defrosting

Number of

check modes

1 time

2 times

4 times

Check time

–

30 minutes

h) Inlet temp thermistor

trouble (TH4)

Cooling, heating operating

1 time

3 minutes

i) Liquid temp thermistor

trouble (TH5)

Cooling, heating operating

1 time

3 minutes

j) Condenser/evaporater

temp thermistor trouble (TH6)

Cooling, heating operating

1 time

3 minutes

> =

Page 49

- 45 -

(3) Fan control

Controls the fan speed based on the piping temperature (TH1) to perform cooling at low outdoor temperatures and heating at high outdoor temperatures.

1) Control at cooling a) When the compressor stops, the fan stops (fan output=0%). b) When the power is turned on, or when the compressor is restated after it has been stopped for 30 minutes or

longer, the piping temperature ( TH1) determines the fan output.

When TH ≤ 25˚C Fan output = 100 % When TH < 25˚C Fan output = 60 %

c) When the compressor is restarted within 30 minutes after it has been stopped, the fan step before the compres-

sor was stopped is selected. However, when the fan output was under 30% when the fan was stopped, 30% is

selected. d) When the mode was changed from heating to cooling, the fan step conforms to item 2. e) Two minutes after the fan is started, the fan step (number of units) is controlled every 30 seconds based on the

piping temperature (TH1). f) When TH1 reaches 50˚C or higher, or when the control high pressure switch (63H2) tripped, the fan output

becomes 100%. g) Fan output while the compressor is operating is within the 20% to 100% range.

• FAN step The following expression determines the next fan step count nj+1: nj + 1 = nj + ∆nj nj: Current fan step, ∆nj: Displacement step amount nj control

• If nj + 1 ≥ 100% nj + 1 = 100%

• If nj + 1 ≥ 20% nj + 1 = 20%

• If TH1 ≥ 50 °C or 63H2 is “OFF” nj + 1=100%

FAN ∆nj Outputs are all %.

* In the night mode, the maximum value of nj is 80%. (When TH1 < 50˚C)

Target condensation temperature 31 °C

Condensation temperature TH1

20 ≤ nj < 50

50 ≤≤ nj 100

Current

output

t > 49 °C

t = 49

t > 46

t = 46

t > 43

t = 43

t > 40

t = 40

t > 36

t = 36

t > 33

t = 33

t > 29

t = 29

t > 26

–2

t = 26

t > 23

–2

t = 23

t > 20

–3

–4

≤

20 ˚C

–5

–10

(2) Compressor, 4-way valve, and crankcase heater control

1) Determines the operation mode and operates the compressor based on the indoor/outdoor communication or MNET communication data.

2) Compressor control has a function which prevents the compressor from restarting within 3 minutes.

3) The 4-way valve is always ON during heating (except during defrosting). In other modes, it is OFF. However, when the operation mode was changed from heating to stop, the 4-way valve is turned off 10 minutes after the compressor was stopped.

4) While the compressor is stopped, the crankcase heater remains ON. (OFF while the compressor is operating.)

5) When the operation mode is changed while the compressor is operating, the compressor stops and 3 minutes later restarts in the new mode.

Page 50

- 46 -

T = 17

T > 15

–3

2) Control at heating

a) When the compressor is stopped and during defrosting, the fan is stopped. b) When the power is turned on, or when the compressor is restarted after being stopped for 30 minutes or longer,

the piping temperature (TH1) determines the fan step.

TH1 > 8˚C Fan output = 60% TH1 ≤ 8˚C Fan output = 100%

c) When the compressor is restarted within 30 minutes, the fan step is the step before the compressor was stopped. d) When the mode is changed from cooling to heating, the fan step conforms to item b). e) When returning from defrosting, the fan step is the step before defrosting. f) Two minutes after the fan was restarted, the fan step is controlled every 30 seconds based on the piping

temperature (TH1).

g) When TH1 is –5˚C or lower, the fan output is made 100%.

• FAN step The following expression determines the next fan step count nj + 1: nj + 1 = nj + ∆nj nj: Current fan step, ∆nj: Displacement step amount nj control

• If nj + 1 ≤ 100% nj + 1 = 100%

• If nj + 1 ≤ 20% nj + 1 = 20%

• If TH1 < –5 °C nj + 1=100%

FAN ∆nj Outputs are all %.

(4) Defrosting control

1) When the following conditions are satisfied, defrosting starts: a) When the integrated compressor operation time has exceeded T

1 (initial setting 50 minutes) and the piping

temperature (TH1) is below –10˚C

b) When the integrated compressor ˚C

Piping differential temperature ∆TH1 = TH10 – TH1

2) The defrosting prohibit time T

1 is set as following based on the defrosting time T2:

Note: T

1 is reset at the end of defrosting, or by cooling ON command.

Note: When the compressor was stopped during defrosting, T1 = 20 minutes is set to recognize the stop as

defrosting end.

3) During defrosting, all the outdoor fans are stopped and the bypass solenoid valve (SV1) is turned ON and the 4-way valve (21S4) is turned OFF.

4) When the following conditions are satisfied, defrosting ends: a) T

2 ≤ 2 mins TH1 ≤ 30°C

b) 2 < T

2 < 15 minutes TH1 ≤ 8°C continuous 2 minutes

c) T

2 =15 minutes

5) When the fan and 4-way valve (21S4) are turned ON at the end of defrosting, the heating mode is reset. Two minutes after defrosting reset, the bypass solenoid valve (SV1) turns OFF.

Target evaporation temperature 10 °C

Evaporation temperature TH1

20 ≤ nj + 1 ≤ 100

Current

output

T > 19 °C

–10

T = 19

T > 17

–4

T = 15

T > 13

–2

T = 13

T > 11

–2

T = 11

T > 8

T = 8

T > 6

T = 6

T > 4

T = 4

T > 2

T = 2

T > 0

T≤ 0˚C

Current piping temperature

Piping temperature 10 minutes after starting or 10 minutes after returning from defrosting

2 ≤ 3 (minutes) T1 60 (minutes)

3 < T2 < 15 40 T

= 15

Page 51

- 47 -

(6) Electronic expansion valve (LEV)

1) Initial processing after power turned on After the power is turned on, full close processing is performed as initial drive processing. a) A 2200 pulses down is output from power on. b) At the end of 2200 pulse down output, 60 pulses up is output. c) Sixty pulses up output ends initial processing. At this point, the valves are fully closed.

2) Control contents

3) Normal LEV control a) The operation frequency when the compressor is started (including after defrosting reset) determines the stan-

dard opening angle.

b) After a) above, sub cool (SC) shown below controls the LEV opening angle.

<Definition of SC> Cooling: SC = TH3 (outdoor-side refrigerant circuit)-TH1 (outdoor-side refrigerant circuit) Heating: SC = TH5 (indoor-side refrigerant circuit)-TH2 (indoor-side refrigerant circuit) <LEV control> LEV is controlled so that SC is equal to SCm. SC < SCm: LEV opening angle is made smaller SC > SCm: LEV opening angle is made larger SC = SCm: LEV opening angle remains unchanged SCm = 5~15 (SCm is different with Indoor-side.)

4) Transient LEV control

a) When the outlet temperature (outdoor-side TH2) rises

When the outlet temperature (outdoor-side TH2) exceeds 115 °C, the LEV opening angle is made larger.

(7) Service functions

1) Abnormality history clear a) When DIP SW1-2 is turned ON while the compressor is operating or stopped, the abnormality history is cleared.

(5) Bypass solenoid valve control (SV1)

1) Control at cooling

a) While the compressor is stopped, the solenoid valve is OFF. b) When the power is turned on, or when the compressor is restarted after it has been stopped for 30 minutes or

longer, if the liquid temperature (TH1) is 25˚C or higher then the solenoid valve turns ON for 2 minutes.

c) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 5 minutes if the liquid temperature (TH1) is staying below 25˚C. d) The item b) or c) is applied to the mode change from heating to cooling. e) When the previous operation mode is cooling and the compressor restarted within 30 minutes after it’s stopping

by the tripping of 63H2, the solenoid valve turns ON for 2 minutes.

2) Control at heating a) While the compressor is stopped, the solenoid valve is OFF. b) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 2 minutes if the liquid temperature (TH1) is staying above 8˚C.

c) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 5 minutes if the liquid temperature (TH1) is staying below 8˚C. d) The item b) or c) is applied to the mode change from cooling to heating. e) When the control pressure switch (63H2) trips, the solenoid valve turns ON. f) If 63H2 resets 15 minutes after tripping, the solenoid valve turns OFF. g) During defrosting, the solenoid valve turns ON. h) When the previous operation mode is heating and the compressor restarted within 30 minutes after it’s stopping

by the tripping of 63H2, the solenoid valve turns ON for 2 minutes. i) When the previous operation mode is heating, and the compressor restarted within 30 minutes after the tripping

of 63L, the solenoid valve turns ON for 2 minutes.

At compressor starting At compressor stopping At defrosting Normal

LEV output opening angle

Initial opening angle

1000 pulses

2000 pulses (full close)

See next item

Opening angle control range

Approx. 1000 to 2000 pulses

– –

1000 to 1500 pulses

Page 52

- 48 -

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

01234

56789

10 11 12 13 14

[3] Function of switches and connectors (outdoor-side)

(1) Function of switches

1) Function of switches (Normal mode)

Switch

SW2

SW3

SW4

SW5

Switch effec-

tive timing

–

Running or

stopped

When power

turned on

Running or

stopped

stopped*

stopped

–

When power

turned on

When power

turned on

Operation by switch operation

ON OFF

––

Clear Normal

See pages 47 to 52.

Operate Stop

Heat Cool

Do Do not

Do not Do

Cooling only Heat pump

PRH-P20MYA

PRH-P10MYA

Normal mode

SW3 = Unrelated

Kind of

switch

DIP SW

Tact SW

DIP SW

Pole

1 2 3 4 5 6

1 2 1

Function

None

Abnormality history clear

Refrigerant system

address setting

Self diagnosis

Mode input register

Trial run

Trial run mode switching

Inlet temp. re-reading

3-phase power source

detection

Cooling only switching

Model setting

Remarks

Function

None

Night mode

Defrosting end switching

Defrosting prohibit time

switching

None

Switch effec-

tive

timing

–

stopped

–

Switch

SW1 When CN33

shorted

(mode

switching)

Operation by switch operation

ON OFF

––

Night mode Normal mode

Fixed Training

––

Kind of

switch

DIP SW

Pole

1 2 3

*1 Trial run performs trail run processing by input change while stopped. (For details, see the trail run section) *2 Mode input is entered by SW3 OFF→ON change (___↑). Press and hold down SW3 for about 2 seconds. The set

mode can be registered according to the outdoor unit setting information on page 37.

2) Switch functions at set mode change

Note: After changing the mode by CN33 shorting (mode switching), return to the normal mode by opening CN33.

3) Connector function assignment

12 °C continuous 2 minutes

8 °C continuous 2 minutes

Set input mode

CN33 = short SW3 = ON*

→

Shows that Nos. 3, 4, 5 , and 6 of SW1 are ON.

Type

Connector

CN31 CN32 CN33

Function

Emergency operation

Function test

DIP switch mode switching

Operation by open/short

short open

Start Normal

Function mode Normal

Mode switching Normal

Switch effec-

tive timing

At initialization

stopped

PRH-P16MYA PRH-P250MYA PRH-P200MYA PRH-P500MYA PRH-P400MYA

PRH-P8MYA

SW1 CN33 When

open

(Normal)

Page 53

- 49 -

Display Check unit

0 Outdoor-side unit 1 Indoor-side unit

Display Compressor 4-way valve Bypass solenoid valve

0 –– – 1 –– ON 2 – ON – 3 – ON ON 4ON –– 5ON – ON 6ON ON – 7ON ON ON

<Outdoor-side unit operation monitoring function>

The operation status and check code contents can be ascertained by means of the 2-digit number and symbol on digital display light emitting diode LED2 by operating DIP switch SW2.

• When ON (normal operation): Displays the operation mode.

• When blinking (Operation stopped by tripping protection device): Displays the check mode

[Tens digit: Operation mode]

Display Operation mode

O stopped

C Cooling/Dry H Heating d Defrost

[Units digit: Relay output]

• PRH-P8MYA/P10MYA/P16MYA/P20MYA/P200MYA/P250MYA/P400MYA/P500MYA

Display Check contents (at power on)

Indoor-side/outdoor-side communication receive abnormal (outdoor-side unit)

Indoor-side/outdoor-side communication send abnormal (outdoor-side unit)

Indoor-side/outdoor-side connection erroneous wiring

Indoor-side/outdoor-side connection erroneous wiring (indoor-side unit power failure, disconnection)

Ed Serial communication abnormal (M-NET)

E0-E7 Communication other than outdoor-side unit abnormal

F8 Input circuit faulty

Display Check contents (operating)

U2 Compressor discharge temperature abnormal, CN23 short-circuit connector unplugged U3 Compressor discharge temp thermistor (TH2) open/short U4 Liquid temp thermistor (TH1), Condenser/evaporater temp thermistor (TH3) open/short U6 Compressor overcurrent protection trip (51C trip) UE High pressure protection (63H1 trip)

UL Low pressure protection (63L trip) P1-P9 Indoor-side unit abnormal A0-A8 M-NET communication abnormal

SW2

LED2

12 3 4 5 6

OFF

(Load status)

Page 54

- 50 -

°C

100 times

10 hours

5 pulses

Check mode 1 display method

bit 1 ..... Compressor discharge temperature

abnormal

bit 2 ..... Compressor discharge temp thermistor

abnormal (TH2)

bit 3 ..... CN23 short-circuit connector un-

plugged

bit 5 ..... Liquid temp thermistor abnormal (TH1)

SW2 setting Display contents Description of display Unit

Outdoor-side unit liquid temperature (TH1)

Outdoor-side unit

–39 - 88

discharge temperature (TH2) 0 - 216

FAN output 0 - 100

Number of compressor ON/OFF 0 - 999

Compressor integrated operation time 0 - 999

Current check mode code 1

Current check mode code 2

LEV opening angle (/5) 0 - 400

–39 - 88 (When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When –10,

every other second –

←→ 10

0 - 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 115,

every other second 1

←→ 15

0 - 100 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 425,

every other second 4

←→ 25

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

Check mode segment display method Segment and bit correspondence

Check mode 2 display method

bit 1 ..... Overcurrent trip (Comp)

bit 2 ..... Low pressure protection

0 - 400 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 200 ,

every other second 2

←→ 00

Self diagnosis by SW2

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

bit 1

bit 5

bit 2 bit 3

bit 4

bit 8

bit 6 bit 7

Page 55

- 51 -

Newest check code Newest outdoor unit abnormality Check display

Operation mode when abnormality occurred

Liquid temperature (TH1) when abnormality occurred – 39 - 88

COMP discharge temperature (TH2) when abnormality occurred 0 - 216

Check code history (1) (newest) Abnormal unit No. and check code inverted display

Check code history (2) (One before newest) Abnormal unit No. and check code inverted display

Current thermostat ON time 0 - 999

Number of indoor units connected 0 - 4

When no check mode,“00” <Example> When piping thermistor abnormal U4

Operation mode when abnormally stopped <Example> Comp. only ON at cooling operation C4

–39 - 88 (When 0 °C or lower, “–” and temperature are displayed alternately.) <Example> When –15,

every other second –

←→ 15

0 - 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 130,

every other second 1

←→ 30

When no abnormality history “0”, “←→”, “–”

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

0 - 4

Code display

°C

Code display

Minutes

Units

SW2 setting Display contents

Description of display

Unit

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Page 56

- 52 -

Outdoor-side unit capacity is displayed as function code.

Model name function code

PRH-P8MYA/P200MYA 20

PRH-P10MYA/P250MYA 25

–40 - 90 (When 0 °C or lower, “–”and temperature are displayed alternately.) When there are no indoor-side unit, “00” is displayed.

8 - 39.5 When there are no indoor-side unit, “00” is displayed.

17 - 30 When there are no indoor-side unit, “00” is displayed.

Outdoor-side unit set information 1

Outdoor-side unit set information 2

Indoor-side unit piping temperature (TH5) Indoor 1 –40 - 90

Indoor-side unit intake temperature (TH4) 8 - 39.5

Indoor set temperature 17 - 30

Code display

°C

SW2 setting Display contents Description of display Unit

Outdoor-side unit set information 1

Function setting (display valves) 3-phase power source detection Do (1) Do not (0) Cooling only switching Cooling only (2) H/P (0) Night mode Night mode (1) Normal mode (0) Defrosting end time

12 °C continuous 2 minutes

(2)

8 °C continuous 2 minutes

(0)

Defrosting prohibit time Fixed (4) Training (0)

Tens digitUnits digit

Set information display values are added and displayed at each position.

PRH-P16MYA/P400MYA 20 + 20 PRH-P20MYA/P500MYA 25 + 25

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Page 57

- 53 -

Indoor-side control status

condenser/evaporater temperature (TH3)

Outdoor-side

Outdoor-side unit

control status

Discharge super heat SHd 0 - 216 Cooling: Outdoor-side

TH2 – Outdoor-side TH3

Heating: Outdoor-side

TH2 – Indoor-side TH6

Cooling: Outdoor-side

TH3 – Outdoor-side TH1

Heating: Indoor-side

TH6 – Indoor-side TH5

Sub cool Sc 0 - 130

Target sub cool step N 1 - 5

–39 - 88

(When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When –10,

every other second –

←→ –10

0 - 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 150,

every other second 1

←→ 50

0 - 130 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

1 - 5

–

°C

–

°C

–

SW2 setting Display contents Description of display Unit

Indoor-side

Control mode

Indoor-side

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Freeze prevention

Surge prevention

Compressor OFF

Display

0 1 2 3 4 5 6 7

Control mode display system

Outdoor-side

Control mode

Outdoor-side

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Freeze prevention

Surge prevention

Compressor OFF

Display

0 1 2 3 4 5 6 7

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Page 58

- 54 -

Communication demand capacity 0 - 255

Abnormal thermistor display 1 - 3, –

Outdoor-side fan output at abnormal stop 0 - 100

LEV opening angle (/5) at abnormal stop 0 - 400

Outdoor-side condenser/evaporater temperature at abnormal stop –39 - 88

Discharge super heat (SHd) at abnormal stop 0 - 216 Cooling:

Heating:

Sub cool (Sc) at abnormal stop 0 - 130 Cooling:

Heating:

0 - 255 When communication demand not set: 100% (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 100

1 - 3, – 1: Outdoor-side liquid temp thermistor (TH1) 2: Outdoor-side discharge temp thermistor (TH2) 3: Outdoor-side condenser/evaporater temp thermistor

(TH3)

–: No abnormal thermistor

0 - 100 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second –

←→ 00

0 - 400 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 200,

every other second 2

←→ 00

–39 - 88 (When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When –10,

every other second –

←→ –10

0 - 216 (When 100 °C or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 150,

every other second –

←→ 50

0 - 130 (When 100 °C or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

–

5 pulses

°C

SW2 setting Display contents

Description of display

Unit

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Outdoor-side TH2 – Outdoor-side TH3 Outdoor-side TH2 – Indoor-side TH6

Outdoor-side TH3 – Outdoor-side TH1 Indoor-side TH6 – Indoor-side TH5

Page 59

- 55 -

Thermostat ON time up to abnormal stop 0 - 999

LEV regular control count n 1 - 5

Indoor-side unit condenser/evaporater temp temperature (TH6) –40 - 90

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

1 - 5

–40 - 90 (When 0 ˚C or lower, “–”and temperature are displayed alternately.) When there are no indoor-side controller board, “00” is displayed.

Minutes

–

˚C

SW2 setting Display contents

Description of display

Unit

123456

OFF

123456

OFF

123456

OFF

[4] Function of switch on indoor-side controller board

(1) DIP SW1 for model Selection (DIP SW1 has been set at factory)

(2) DIP SW2 for Capacity Setting (DIP SW2 has been set at factory)

(3) DIP SWE for Emergency Operation

SW1-1, -3, -4 ON, SW1-2, -5 OFF

PRH-P8MYA/16MYA : SW2-1, -2, -3 and, -4 OFF

When SWE is turned ON, FAN turns ON. Setting of emergency operation other than SWE is performed at the outdoor-side controller board.

OFF

12345

OFF

1234

OFF

12345

OFF

12345

PRH-P10MYA/20MYA: SW2-1 ON, SW2-2, -3, and, -4 OFF

OFF

1234

PRH-P200/400MYA: SW2-3, -5 ON, SW2-1, -2, -4 OFF

PRH-P250/500MYA: SW2-2, -3, -5 ON, SW2-1, -4 OFF

Page 60

- 56 -

[5] Simple parts check method

• PRH-P8MYA/P10MYA/P16MYA/P20MYA

Part name

Thermistor (TH1) <Outdoor-side liquid temperature detection>

Thermistor (TH4) <Indoor-side intake temperature> Thermistor (TH5) <Indoor-side unit piping temperature> Thermistor (TH6) <Indoor-side unit condenser/ evaporater temperature>

Thermistor (TH2) <Discharge temperature detection> Thermistor (TH3)

<Outdoor-side condenser/ evaporater temperature

detection>

Outdoor-side fan motor

Compressor

Thermal protector trip temperature

135 ± 5˚C : ON

88 ± 5˚C : OFF

Judgment instructions

Disconnect the connector and measure the resistance value with a multimeter. (Ambient temperature 10 ˚C to 30 ˚C)

Measure the resistance value across the terminals with a multimeter. (Winding temperature 20 ˚C)

Normal

4.3 kΩ~9.6 kΩ

160 kΩ~410 kΩ

Abnormal

Open or short

(Based on thermistor characteristic table (next page))

TH1, 3, 4, 5, 6

TH2

White

Blue

Black

Normal

45.5 Ω

Abnormal

Open or short

Motor lead wire

Between 2 phases

Normal

PRH-P8, 16, 200, 400MYA

Each phase 1.574 Ω

PRH-P10, 20, 250, 500MYA

Each phase 1.263 Ω

Abnormal

Open or short

Red

Indoor-side fan motor Measure the resistance value across the terminals with a multimeter. (Winding

temperature 20 ˚C)

White

Black

Red

Normal

13.2 Ω 10.2 Ω 6.4 Ω 3.4 Ω

PRH-P8MYA

P200MYA

PRH-P10MYA

P250MYA

PRH-P16MYA

P400MYA

PRH-P20MYA

P500MYA

Motor lead wire

Between 2 phases

Open or short

Abnormal

Motor lead wire

Between 2 phases

Page 61

- 57 -

[6] Reference Data

Low temperature thermistor

Thermistor <Liquid temperature detection> (TH1, 5) Thermistor <Condenser/evaporater temperature detection> (TH3, 6) Thermistor <Indoor-side intake temperature (TH4) Thermistor Ro = 15 kΩ ± 3 % B constant = 3,460 kΩ ± 2 %

Rt = 15 exp {3,460 (–––––– – ––––)}

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

273 + t 273

Resistance

High temperature thermistor Thermistor <Discharge temperature detection> (TH2)

Thermistor (Discharge temperature detection) (TH2) Thermistor R120 = 7.465 kΩ ± 2 % B constant = 4,057 kΩ ± 2 %

Rt = 7.465 exp {4,057 (–––––– – ––––)}

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

273 + t 393

Temperature

Resistance

Temperature

-20 -10 10 20 30 40 50 600

90 100 110 120

Page 62

- 58 -

[7] Troubleshooting of each part

(1) LEV

1) Overview of LEV operation LEV (electronic expansion valve) receives pulse signals from the outdoor-side controller board and drives a valve by means of a servomotor. The valve opening angle changes in proportion to the number of pulses. <Outdoor-side controller board and LEV>

The output pulses change in the following order: Valve closing 1 → 2 → 3 → 4 → 1 Valve opening 4 → 3 → 2 → 1 → 4 *1. When the LEV opening angle is not changed, all output

phases turn OFF.

2. When the output misses a phase or remains ON, the motor cannot rotate smoothly and makes a clacking sound and vibrates.

White

Red

Orange

Blue

Brown

Yellow

Brown

Red

Blue

Yellow

White

Connector Outdoor-side controller board CN40

Drive circuit

Output (phase)

No.

ø1 ø2 ø3 ø4

Output state

1234 ON OFF OFF ON ON ON OFF OFF

OFF ON ON OFF OFF OFF ON ON

LEV opening and closing operations

* When the power is turned on, to register the valve posi-

tion, a 2200 pulses valve close signal is output and is always set to point A .

If the valve moves smoothly, the LEV will not generate a sound or vibration, but at E → A and when the valve is locked, a sound louder than the sound generated by missing phase, etc. will be generated.

* Generation of sound can be checked by placing the tip of

a screwdriver against the valve and your ear against the handle.

Valve opening angle (flow)

Valve closing

Valve opening

Increased throttling region (80 - 100 pulses)

Full open 2000 pulses

Pulse count

Page 63

- 59 -

2) Judgment method and probable trouble mode

3) Electronic expansion valve motor replacement instructions

1. Description of construction

1.1 A lock nut connects the motor to the valve body.

1.2 The motor consists of a motor rotating section, rotation transmission gear section, and a driver which converts rotation to linear motion.

1.3 The valve body consists of a valve assembly, which moves up and down, and an orifice. A bellows at the top of the valve body block isolates the refrigerant circuit from the atmosphere side. Therefore, the motor is not exposed to the refrigerant.

2. Principle of operation

2.1 Pulses output from the outdoor-side controller board are sequentially supplied to four coils and the motor

is rotated.

The motor can be rotated in either clockwise or counterclockwise by changing the order in which the pulses are supplied.

2.2 The gear section reduces the motor speed to 1/30 and supplies the motor rotation to the motor output shaft.

2.3 The motor output shaft is threaded and is used as a driver.

2.4 The up and down motion of the end of the driver moves the valve assembly of the valve body up and down and controls the flow by changing the distance between the orifice and the bottom end of the valve.

Trouble mode

Microcomputer drive circuit faulty

LEV mechanism locked

LEV motor coil open or shorted

Connector connection incorrect, or contact faulty

Judgment method

(1)Disconnect the outdoor-side controller board connector,

and connect the check LED shown below.

When the mains power is turned on, a pulse signal is output for 10 seconds. If the LED remains OFF or ON, the drive circuit is abnormal. (1)When the LEV is in the locked state and driven, the mo-

tor races. At this time, a soft clicking sound is generated. When this sound is generated both when closing and

when opening, the mechanism is abnormal. Measure the resistance between the coils (red-white, redorange, brown-yellow, brown-blue) with a multimeter. If 150 Ω ±10%, the coil is normal. (1)Visually check for loose connector terminals and check

the color of the lead wires. (2) Disconnect the outdoor-side controller board

connector and check the continuity with a multimeter.

Remedy

When drive circuit is faulty, replace outdoor-side controller board.

Replace LEV

Replace LEV coil

Check continuity of faulty point

Valve assembly

Motor

Driver

Lock nut

Refrigerant circuit

alve

body

Orifice

Bellows

Page 64

- 60 -

3. Work precautions

3.1 Do not apply abnormal force to the motor.

3.2 Do not use a motor that has been dropped.

3.3 Do not remove the cap until immediately before starting work.

3.4 Do not wipe off the molybdenum.

3.5 Do not remove the packing.

3.6 Do not coat the lock nut with a substance other than the specified lock tight, grease, etc.

4. Replacement instructions

4.1 Stop the air conditioner from the remote controller. After confirming that the air conditioner has stopped, turn off the unit power.

4.2 Get two wrenches. Hold the flat part of the body with one wrench and loosen the lock nut with the other wrench. The lock nut loosens when turned counterclockwise as viewed from the motor. Always use two wrenches. Do not hold the motor with one hand and try to loosen the lock nut with only one wrench.

4.3 When the lock nut is turned several turns, it will disengage from the threads and the motor can be removed.

4.4 Get the replacement motor. The replacement motor is limited to a motor whose driver end position has been set at the factory for replacement use. (The driver end of factory set parts does not stick out.) Use of a motor whose driver end position is not set is related to erroneous valve flow control or no operation.

4.5 During replacement work, be sure that dirt, foreign matter, or water does not enter the part where the motor and valve body separate. (Since the part exposed by separation corresponds to the mechanical part of the valve.) Do not damage the connecting part with the tools. After removing the motor, 1

blow out the body bellows section with N2 gas, etc. to remove the water clinging to the inside and 2 after fan stop processing of the pertinent unit in the motor removed state, dry the bellows section by performing the cooling operation for 30 minutes.

4.6 Remove the cap of the replacement motor and butt the bottom of the motor against the top of the valve body and hold it so that both are aligned and connect the motor to the valve body with the lock nut.

Coat the entire periphery of the threaded part with screw lock. Be sure that the screw lock does not enter the interior. If a defect occurs during replacement work, do not use the motor, instead use a new replacement motor.

4.7 After tightening the lock nut 2 to 3 turns by hand, hold the flat part of the body with one wrench and tighten to

the prescribed torque with a torque wrench. Tighten to a torque of 15N·m (150kgf·cm) (Control value 15 ±1N·m (150 ± 10 kgf·cm)) If tightened too tight, the flare nut may break during use.

4.8 When tightening the lock nut, hold the motor with your hand, etc. so that strong rotation torque and bending load are not applied.

4.9 The difference of the relative positions of the motor and body after assembly has no affect on the valve control and open/close mechanism. Do not try to forcefully position the motor and valve body to correct “displacement” after tightening of the lock nut due to the difference in the positional relationship between the motor and valve body before and after assembly.

Fixing with the clip may be impossible due to motor section deformation, but fixing of the piping is sufficient and fixing by clip is unnecessary.

4.10 Connect the connector. At this time, be sure not to pull the lead wires forcefully. Also, firmly insert the connector up to the lock and check that it cannot not be easily disconnected.

4.11 Turn on the unit power and operate the air conditioner from the remote controller and confirm that there are no abnormalities.

Rotation direction “displacement” is OK.

Motor

Packing

Molybdenum

Cap

Page 65

- 61 -

[8] Emergency operation

(CN31) on the outdoor-side controller board.

1) When the following check displays occur at the outdoor-side controller board, or when the wired remote controller or indoor-side controller board microcomputer fails, if there are no other defects, emergency operation is possible by connector shorting the

• Abnormalities that allow emergency operation

2) Check items and precautions when performing emergency operation

a) In addition to the abnormalities above, check the outdoor-side unit for any abnormalities. (When there is an

abnormality other than the above, emergency operation is impossible.)

b) Check the operating range. (For U4 display)

Since the outdoor-side fan always operates at full speed at emergency operation, do not operate the air

conditioner outside the range shown below.

Operation outside this range may cause compressor trouble.

c) When performing emergency operation, set the outdoor-side controller board after setting the emergency operation

switch (SWE) on the indoor-side controller board. For the indoor emergency operation method, refer to the indoor unit wiring diagram.

d) A power failure causes emergency operation to become continuous operation. ON/OFF, temperature adjust-

ment and other operations cannot be performed from the remote controller.

e) Since cool air is discharged from the indoor-side unit, when the outdoor-side unit starts the defrosting

operation during heating emergency operation, do not operate the air conditioner for a long time.

f) You can perform cooling emergency operation up to 10 hours. The indoor-side unit heat exchanger

may freeze.

g) At the end of emergency operation, always return the switch settings, etc. to their original state.

3) Emergency operation contents

a) The operation mode operates according to the contents set (cooling or heating) by SW4-2. b) The fan operation condition is always 100% operation. c) The operation mode display flashes every other second.

Display Check contents

Liquid temp thermistor (TH1) open or shorted

Condenser/evaporater temp thermistor (TH3) open or shorted E8 Indoor-side/Outdoor -side communication receive abnormal (outdoor-side unit) E9 Indoor-side/Outdoor -side communication send abnormal (outdoor-side unit)

E0 - E7 Communication other than outdoor-side unit abnormal

Operation range (outdoor-side unit intake temperature)

Cooling greater than 20 °C Heating less than 10 °

Page 66

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Start

Piping work complete?

Check that mains power is OFF

Turn on emergency operation switch (SWE) on indoor-side controller board

Short CN31 (emergency operation connector) on outdoor-side controller board

Check that emergency operation starts, and that operation mode display flashes

Set operation mode (cooling or heating) with SW4-2 on outdoor-side board (SW4-1 not used)

SW4

Cooling Heating

OFF ON

YES

4) Emergency operation method

* Before starting, recheck that the trouble allows

emergency operation.

Emergency operation release method

Turn on mains power

✻1: For each refrigerant circuit

Turn off mains power.

Turn off emergency operation switch (SWE) on indoor-side controller board

Open CN31 (emergency operation connector) on outdoor-side controller board

Set SW4-2 as shown below

OFF ON

SW4

Turn on mains power

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[9] Self-diagnosis and troubleshooting

Abnormality display

None

Meaning of abnormality display and abnormality troubleshooting

Indoor/outdoor connection erroneous wiring

1. Outdoor-side controller board automatically recognizes the number of connected indoor-side unit. However, when the number of connected indoor unit cannot be set due to erroneous indoor/ outdoor connection, erroneous

wiring, etc. even after 4 minutes have elapsed since the power was turned on, an abnormality is recognized.

Indoor/outdoor connection erroneous wiring

Outdoor-side controller board automatically sets the unit No. of

the indoor unit. However, when the unit

No. of the indoor-side unit

cannot be set due to indoor/outdoor

connection erroneous wiring even

after 4 minutes

has elapsed since the power was turned on, an abnormality is recognized.

Start-up time over

When start-up processing does not end even through 4 minutes has elapsed since the power was turned on, an abnormality is recognized.

Reverse phase detected

Cause

(1) Voltage not applied to unit terminal

block TB1.

a. Power supply circuit breaker not

closed.

b. Power supply terminals connection

faulty, or disconnected.

c. Missing phase

(2) No electricity at outdoor-side controller

board power supply connector.

a. Power supply connector contact

faulty.

b. Terminal CN20 on outdoor-side

controller board disconnected.

(3) Outdoor-side

(4) Transformer faulty

controller board faulty.

a. Blown fuse on outdoor-side

controller board.

b. Part faulty.

(1) Indoor/outdoor connection wire con-

tact faulty.

(2) Outdoor-side controller board send/

receive circuit faulty.

(3) Indoor-side controller board send/

receive circuit faulty.

(4) Noise has entered on power supply

or indoor-side/outdoor-side controller board connection wire.

(1) Indoor/outdoor connection wire con-

tact faulty.

(2) Outdoor-side controller board send/

receive circuit faulty.

(3) Indoor-side controller board send/

receive circuit faulty.

(4) Noise has entered on power supply

or indoor-side/outdoor-side controller board connection wire.

(1)

(2)

Indoor-side/outdoor-side controller board connection wire contact faulty.

(2) Noise has entered on power supply

or indoor-side/outdoor-side controller board connection wire.

Power supply reverse phase connection.

Power supply missing phase.

Judgment method and remedy

(1)

a. Check power supply circuit breaker b. Check power supply terminal block

connections.

c. Check power supply terminal block

connections.

(2)

a. Check power supply connector board

connections.

(3)

a. Replace fuse. b. Replace controller board.

(However, when cannot be repaired even through the check above was carried out.)

(1) Check

(4) Replace transformer

if indoor/outdoor connection wire disconnected or loose. Also check polarity.

(2) Check by turning power off and on.

If abnormality is displayed again, replace outdoor-side controller board or indoor-side controller board.

* LED3 of the indoor-side controller

board flashes when communication is being performed.

(1)Check power supply terminal block

connections.

(2) Replace outdoor-side controller board

(However, when cannot be repaired even though check above was carried out.)

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Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Discharge temperature abnormal

When the discharge thermistor temperature (TH2) exceeds 118 °C while the compressor is operating, an abnormality is recognized.

49C trip (CN23 connector disconnected)

When connector CN23 opens while the compressor is operating, an abnormality is recognized.

Discharge temp thermistor (TH2) open or shorted.

When an open (0 °C or lower) or short (216 °C or higher) is detected while the compressor is operating, an abnormality is recognized. (Detection is disabled for 5 minutes at compressor starting.)

Liquid temp thermistor (TH1) or condenser/evaporater temp thermistor (TH3) open or shorted.

When an open (–39 °C or lower) or short (88 °C or higher) is detected while the compressor is operating, an abnormality is recognized. (Detection is disabled for 7 minutes beginning from 10 seconds after the compressor starts and for 10 minutes after return from defrosting.)

Compressor overcurrent trip

When the current value reaches the overload set value or higher while the compressor is operating, an abnormality is recognized.

P8, 200MYA ........................... 22 A

27 A

22 A x 2 pcs.

P10, 250MYA .........................

P16, 400MYA ...........

27 A x 2 pcs.P20, 500MYA ...........

Cause

(1) Compressor overheating due to insuf-

ficient refrigerant.

(2) Thermistor faulty. (TH2) (3) Outdoor-side controller board faulty.

(1) Shorting connector CN23 on

outdoor-side controller board dislodged or contact faulty.

(1) Connector (CN3) dislodged or con-

nect faulty.

(2) Thermistor faulty.

(3) Outdoor-side controller board faulty.

(1) Connector (TH1: CN2, TH3: CN4) dis-

lodged or contact faulty.

(2) Thermistor faulty.

(3) Outdoor-side controller board faulty.

(1) Overload operation exceeding unit us-

age range limit. (2) Power supply terminal voltage low. (3) Power supply missing phase. (4) Compressor motor faulty. (5) Compressor locked. (6) Connector (CN23) on outdoor-side

controller board dislodged or

contact faulty. (7) 51C (8) Liquefied refrigerant gas entering

and accumulating in the compressor

disconnected or contact faulty.

Judgment method and remedy

(1) Check input super heat.

Check for refrigerant leakage and check piping length. Charge with additional refrigerant.

(2)(3)

Turn off power and restart operation and check if U3 is displayed within 8 minutes. When U3 is displayed, carry out U3 processing. (Do not replace board at U2 display only.)

(1) Repair shorting connector.

(1)Check connector contact and ther-

mistor wire.

(2) Check thermistor resistance value, or

check temperature by microcomputer. (Check using SW2 self-diagnosis function.) See page 54.

(3) Replace outdoor-side controller board.

(Replace board after sufficiently checking 1 and 2.)

(1)Check connector contact and ther-

mistor wire.

(2) Check thermistor resistance value or

check temperature by microcomputer. (Check using SW2 self-diagnosis function.) See to page 54.

(3) Replace outdoor-side controller board.

(Replace board after sufficiently checking 1 and 2)

(1) Check usage conditions.

(Check for short cycle operation.) (2) Check power supply voltage. (3) Check wiring for breaks and faulty con-

tact. (4) Check motor winding resistance (See

page 53.) (5) Replace

(8) Absence of energization in the

crankcase heater

compressor.

(6)(7)

After checking connections, restart and

check operation.

High Pressure Abnormality (63H1 operation)

Considered abnormal when 63H1 goes into operation during compressor operation (3.3 MPa or above)

63H1:Pressure switch (High Pressure)

OFF:3.3 (MPa) ON :2.65±0.2(MPa)

(1) Short cycle on the indoor-side (2) Clogged filter on the indoor-side (3) Reduced air flow on the indoor-side

due to dirty fan

(4) Dirty heat exchanger on the indoor-

side (5) Fan motor lock on the indoor-side (6) Fan motor malfunction on the indoor-

side (7) Clogged or broken pipe

(1)~(6):During heating operation

Check the unit on the indoor-side, and correct the problems.

(7) Check the piping, and correct the

problems.

-0.15

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Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Cause Judgment method and remedy

(8) Fan motor lock on the outdoor-side (9) Fan motor malfunction on the outdoor

-side (10) Short cycle on the outdoor-side (11) Dirty heat exchanger on the outdoor

-side (12) Reduced air flow on the outdoor-side

due to dirty fan

(

) Disconnected connector (63H1) on

the outdoor-side controller board or

contact failure (14) Disconnected 63H1 or contact failure (

) Controller board failure on the out-

door-side (

) LEV malfunction

(Fully closed due to disconnected

wiring) (17) Defective parts (

) Drop in power supply voltage

(19) 52C failure

(8)~(12):During cooling operation

Check the unit on the outdoor-side, and correct the problems.

(13)(14):Check the connectors

Turn off the power, and make sure F2 is displayed when the power is turned back on. When F2 is displayed, follow the remedy for F2.

(15) Replace the controller board on the

outdoor-side

(16) Check the LEV.

Refer to page 55.

(17) Replace high-pressure pressure

switch

(

) Check the input voltage at the power

supply terminal (TB1).

(

) Make sure 52C is operating normally.

Low Pressure Abnormality (63L operation)

Considered abnormal when 63L goes into operation during compressor operation (0±0.02MPa or above)

63L:Pressure switch (Low Pressure)

OFF:0±0.02(MPa) ON

:0.06±0.04(MPa)

(1) Instantaneous vacuum state due to

uneven distribution of refrigerant im-

mediately after refrigerant charging

(insufficient refrigerant in the low

pressure line) (2) Gas leak or insufficient gas (3) Fully closed LEV due to disconnected

wiring or locking (4) Short cycle on the indoor-side (5) Clogged filter on the indoor-side (6) Reduced air flow on the indoor-side

due to dirty fan (7) Dirty heat exchanger on the indoor-

side (8) Fan motor lock on the indoor-side,

motor malfunction

(4)~(8) Drop in low pressure due to

reduced evaporation capacity during

cooling (9) Short cycle on the outdoor-side (10) Dirty heat exchanger on the outdoor-

side (11) Fan motor lock, motor malfunction, or

FANCON board malfunction on the

outdoor-side

(9)~(11) Drop in low pressure due to

reduced evaporation capacity during

heating operation (12) Disconnected connector (63L) on the

outdoor-side controller board or con-

tact failure (13) Disconnected 63L or contact failure (14) Defective controller board on the out-

door-side (15) Defective parts

Once the low-pressure pressure error is experienced, do not restart the unit by power reset before taking the following steps (Otherwise, the compressor will be damaged.)

Check for a clogged piping. Refer to the section on troubleshooting the LEV (p.55).

After confirming that the piping is not clogged, perform an error reset by power reset. Run a 10 to 15 minutes of operation in the mode opposite to the mode in which the protection function tripped (Run a hating operation if the problem happened in the cooling mode, or vice versa.) Follow the same procedure if no clogging in the piping was found.

(1) Restart and check the operation after

performing an error reset. (2) Check the refrigerant amount. (3) Run a cooling or a heating operation

and check the operating conditions.

Refer to the section on Trouble shoot-

ing the LEV. (4)~(8):During cooling operation

Check the unit on the indoor-side, and

correct the problems. (9)(10):During heating operation

Check the unit on the indoor-side, and

correct the problems. (11) Check the fan on the outdoor-side

Refer to the section on Trouble shoot-

ing the Outdoor Unit Fan (12)(13)Check the connectors (14) Replace controller board on the out-

door-side (15) Replace low-pressure pressure switch

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Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Remote controller communications receive abnormal (remote controller).

1) When transmission from refrigerant address “0” IC is not received normally even once in 3 minutes, an abnormality is recognized.

2) When a slave remote controller does not receive even one signal in 2 minutes, an abnormality is recognized.

Remote controller communication send abnormal (remote controller)

1) When the remote controller can not confirm that the transmission circuit is idle in 6 seconds, an abnormality is recognized.

2) When the remote controller cannot complete 30 continuous transmissions, an abnormality is recognized.

Indoor-outdoor communication receive abnormal (Outdoor-side unit)

When the outdoor-side controller

can not receive normally even once in 3 minutes, an abnormality is

recognized.

Indoor-outdoor communication send abnormal (Outdoor-side unit)

1) When the outdoor-side controller detectes reception of 30 consecutive “0” even through “1” was re- ceived, an abnormality is recognized.

2) When the outdoor-side controller can

not confirm that the transmission circuit is idle in 3 minutes, an error is recognized.

Check code undefined

Displayed when an undefined check code is received.

Cause

(1) Remote controller send/receive

circuit faulty.

(2) Refrigerant address “0” indoor-side

controller board send/receive circuit

faulty.

(3) Noise entered on remote controller

transmission line.

(1) Remote controller send/receive circuit

faulty.

(2) Noise entered on remote controller

transmission line.

(1) Indoor/outdoor connection wire con-

tact faulty.

(2) Outdoor-side controller board send/

receive circuit faulty.

(3) Indoor-side controller board send/

receive circuit faulty.

(4) Noise entered on indoor/outdoor con-

nection wire.

(1) Outdoor-side controller board send/

receive circuit faulty. (2) Noise entered at power supply. (3) Noise entered on indoor/outdoor con-

nection wire.

(1) Noise entered on remote controller

transmission line. (2) Noise entered on indoor/outdoor con-

nection wire.

Judgment method and remedy

Perform remote controller diagnosis. Take the following action based on the diagnosed result: a) [RC OK] display

Remote controller normal. Turn power off and on and check. If “H0” remains on for 4 minutes or longer, replace indoor controller board.

b) [RC NG] display

Replace remote controller.

c) [RC E3] display

[ERC00-66]

(1) Check for disconnected or loose

indoor-side unit or outdoor-side unit indoor/outdoor connection wire.

(2)-(4)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor-side controller board.

(1)(2)(3)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor-side controller board.

(1)(2)

Turn power off and on and check. If abnormality displayed again, replace indoor-side controller board or outdoor-side controller board.

Noise, etc. probable cause.

  

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Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Intake sensor abnormal

1) If thermistor open or short is detected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry, and heat operations. Short: 90 °C or higher Open: –40 °C or lower

Piping (liquid pipe) sensor abnormal

1) If thermistor short or open is detected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry, and heat (except during defrosting) operation. Short: 90 °C or higher Open: –40 °C or lower

Drain sensor abnormal

1) If thermistor short or open continuously detected for 30 seconds, the compressor enters the check mode and turns off and the indoor

-side fan turns off.

2) When another short or open is continuously detected for 30 seconds in the check mode, an abnormality is recognized. (If returned, returns to normal operation.)

3) Always detected during cool, dry, and drain pump operation. Short: 90 °C or higher Open: –20 °C or lower

Cause

(1) Thermistor characteristics faulty. (2) Connector contact faulty.

(Insertion faulty)

(3)Thermistor wiring open or contact

faulty.

(4) Indoor-side controller board faulty.

(1) Thermistor characteristics faulty. (2) Connector contact faulty.

(Insertion faulty)

(3)Thermistor wiring open or contact

faulty.

(4)Faulty refrigerant circuit, etc. has

caused thermistor temperature to rise to 90 °C or higher or drop to –40 °C or lower.

(5) Indoor-side controller board faulty.

(1) Thermistor characteristics faulty. (2) Connector contact faulty.

(Insertion faulty)

(3) Drain sensor wiring open or contact

faulty.

(4) Indoor-side controller board faulty.

Judgment method and remedy

(1)-(3)

Check thermistor resistance value

0 °C ...... 15.0 kΩ

10 °C ........ 9.7 kΩ

20 °C ........ 6.4 kΩ

30 °C ........ 5.3 kΩ

40 °C ........ 3.1 kΩ

Open or faulty contact can be detected by applying force (pulling, bending) to lead wire while measuring thermistor resistance.

(2) Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Check remote controller room tempera-

ture display. If there is a difference between actual room temperature and displayed room temperature after checking that there are no problems at (1)-(3), replace indoor-side controller board. If there are no problems above, there are no abnormalities. Turn power off and on and operate.

(1)-(3)

Check thermistor resistance value. For characteristic, see above (P1).

(2) Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Operate in trail run mode and check

piping temperature with remote controller. When piping temperature is abnormally low (cooling) or high (heating), refrigerant circuit is probably faulty.

(5) Check test run mode piping tempera-

ture with remote controller. If there is a difference between actual piping temperature and displayed piping temperature when there are no abnormalities at (1)-(4), replace indoor

-side controller board. If there is no problem above, there are no abnormalities. Turn on power and operate.

(1)-(3)

Check thermistor resistance value.

0 °C .... 6.0 kΩ

10 °C .... 3.9 kΩ

20 °C .... 2.6 kΩ

30 °C .... 1.8 kΩ

40 °C .... 1.3 kΩ

(2) Check connector for faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor-side controller board.

If there are no problems above, there are no abnormalities. T

urn on power and operate.

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Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Drain overflow protection operation

1) When the drain sensor thermistor overheats and the temperature rise is small, the compressor enters the check mode and is turned off and the indoor-side fan is turned off.

2) If the state above is detected again in the check mode, drain pump abnormality is recognized.

3) Always detected during drain pump operation.

Freezing/excessive rise protection operation

1) Freezing protection When the piping temperature remains at –15 °C or lower for 3 minutes after 3 minutes have elapsed since the compressor started, the compressor enters the 6 minutes restart prohibit mode and if the piping temperature again remains at –15 °C for 3 minutes within 16 minutes after 6 minutes restarting, an abnormality is recognized.

2) Excessive rise protection When a piping temperature rise to 70 °C or higher is detected after the compressor starts, the compressor enters the 6 minutes restart prohibit mode. If a piping temperature rise up to 70 °C or higher is detected again within 10 minutes after 6 minutes restarting, an abnormality is recognized.

Cause

(1) Drain pump trouble. (2) Drain faulty.

Drain pump clogged. Drain pipe clogged.

(3) Water droplets on drain sensor.

Drain water waves created by transmission of drain water from lead wire, clogged filter, etc.

(4) Indoor-side controller board faulty.

<Cool and dry> (1) Filter is clogged (insufficient air flow). (2) Air duct short cycle. (3) Low load operation (low temperature)

exceeding allowable range. (4) Indoor-side fan motor faulty. (5) Outdoor-side fan control faulty

(intermediate period, winter). (6) Refrigerant overcharged. (7) Refrigerant circuit faulty (clogged).

<Heat> (1) Filter clogged (insufficient air flow) (2) Air duct short cycle. (3) Overload operation (high tempera-

ture) exceeding allowable range. (4) Indoor-side fan motor faulty. (5) Outdoor-side fan control faulty

(intermediate period) (6) Refrigerant overcharged. (7) Refrigerant circuit faulty (clogged) (8) Unit bypass circuit faulty.

Judgment method and remedy

(1) Check drain up mechanism. (2) Check drain characteristic. (3) Check drain sensor lead wire arrange-

ment and check for filter clogging.

(4) If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor-side controller board. If there are no problems above, there are no abnormalities. Turn on the power and operate.

<Cool and dry> (1) Check filter for clogging. (2) Remove obstruction. (4) Check indoor-side fan motor

operation and winding resistance.

(5) Check outdoor-side fan motor

operation.

(6)(7)

Check refrigerant circuit operation.

<Heat> (1) Check filter for clogging. (2) Remove obstruction. (4) Check indoor-side fan motor

operation and winding resistance.

(5) Check outdoor-side fan motor

operation.

(6)-(8)

Check refrigerant circuit operation.

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Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Piping temperature abnormal

<Cool> When the piping temperature stays outside the cooling area for 1 minute after 3 minutes have elapsed since the compressor was started, the indoor-side fan operates at low speed. If the piping temperature does not return to the cooling area after 5 minutes operation at low speed, an abnormality is recognized. Note 1) It takes a minimum of 9 min-

utes for an abnormality to be detected.

Note 2) At dry operation, P8 abnor-

mality is not detected. <Heat> When the piping temperature falls outside the heating area and enters the ventilation area after compressor operation and the end of hot adjust, the indoor-side fan stops and the piping temperature does not return to the heating area within 20 minutes after 10 seconds have elapsed after it left the heating area, an abnormality is recognized. Note 3) It takes a minimum of 22

minutes and a maximum of

27 minutes for an abnormal-

ity to be detected. Note 4) Except during defrosting

(Detected again after de-

frosting return.)

Cause

(1) Indoor-side intake piping thermistor

temperature differential small.

- Insufficient refrigerant

- Piping thermistor holder dislodged.

- Refrigerant circuit faulty.

(2) Indoor-side intake piping thermistor

detection faulty.

Judgment method and remedy

(1) Operate in test run mode and check

piping temperature.

(2) Check remote controller room tempera-

ture display and piping temperature in test run mode.

Piping (2-phase pipe) sensor abnormal

1) If thermistor short or open is de-

tected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry,

and heat (except during defrosting) operation. Short: 90 °C or higher Open: –40 °C or lower

(1) Thermistor characteristics faulty. (2) Connector contact faulty.

(Insertion faulty)

(3)Thermistor wiring open or contact

faulty.

(4)Faulty refrigerant circuit, etc. has

caused thermistor temperature to rise to 90 °C or higher or drop to –40 °C or lower.

(5) Indoor-side controller board faulty.

(1)-(3)

Check thermistor resistance value. For characteristic, see page 41.

(2) Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Operate in trail run mode and check

piping temperature with remote controller. When piping temperature is abnormally low (cooling) or high (heating), refrigerant circuit is probably faulty.

(5) Check test run mode piping tempera-

ture with remote controller. If there is a difference between actual piping temperature and displayed piping temperature when there are no abnormalities at (1)-(4), replace indoor

-side controller board. If there is no problem above, there are no abnormalities. Turn on power and operate.

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Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Remote control communication receive abnormal

1) When the indoor-side controller

board can not receive data normally from the remote

controller or another indoor-side

controller board even once in 3 minutes, an abnormality is

recognized.

2) When the indoor-side controller

board can not receive signals even once in 2 minutes, an abnormality is recognized.

Cause

(1) Remote controller transmission line

contact faulty.

(2) All remote controllers set as “slave”

remote controller.

(3) Remote controller send/receive circuit

faulty.

(4) Indoor-side controller board send/

receive circuit faulty.

(5) Noise entered on remote controller

transmission line.

Judgment method and remedy

(1) Check if the unit or remote controller

transmission line disconnected or loose.

(2) Set one remote controller as “master”.

When there are no problems at the

above (3) Perform remote controller diagnosis. a) [RC OK] display

Remote controller normal. Check by turning power off and on. If the abnormality occurs again, replace indoor-side controller board.

b) [RC NG] display

Replace remote controller.

c) [RC E3] display

[ERC00-66] noise, etc. is probable cause.

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Symptom and operation when normal

1. No remote controller display

2. Remote controller displays “H0” unchanged.

3. When remote controller operation switch pressed, operation display appears but immediately disappears.

4. Does not beep and air conditioner does not operate even when operated with wireless remote controller. (Operation display appears on wireless remote controller.)

5. When operated with wireless remote controller, beeps but does not operate.

6. Remote controller display is normal and cooling operation is performed, but without any capacity (does not cool).

Cause

(1) DC14V is not supplied to remote con-

troller. (No power O display on liquid crystal panel.)

(2) DC14V is supplied to remote controller

but nothing is displayed.

- “H0” not displayed

- “H0” displayed

(1)Remote controller displays “H0” for

maximum of 2 minutes for starting after power turned on.

(2) Indoor-remote controller communication

faulty.

(3) Outdoor-indoor controller boards

communication faulty.

(1) Operation switch is disabled for approxi-

mately 30 seconds after function select operation from remote controller is released.

(1) Wireless remote controller and

indoor-side controller board pair number setting mismatched.

(2) Cause of item 1.

(1) Air conditioner does not operate for a

maximum of 2 minutes after the power is turned on.

(2) Set to local operation prohibit mode.

- Remote start/stop adapter is connected to CN32 on indoor-side controller board.

- Air conditioner is connected to MELANS and is set to local operation prohibit mode from centralized controller, etc.

(3) Cause of item 2.

(1) Insufficient refrigerant. (2) Filter clogged. (3) Outdoor-side heat exchanger clogged. (4) Air duct short cycle. (5) LEV malfunction

Symptom judgment and remedy

(1) Check LED2 on indoor-side controller board.

1)Steady light Check remote controller wire open or faulty contact.

2)Flashing Check for remote controller wire short.

3)Not lit Check outdoor-side controller refrigerant address.

(2) Make the following judgment:

- When “H0” is not displayed, remote controller is faulty.

- When “H0” is displayed, see item 2.

(1) Normal operation. (2) Remote controller self-diagnosis. (3) When outdoor-indoor controller boards cannot

communicate, “H0” is displayed for a maximum 6 minutes. Check LED3 on indoor-side controller board.

1) Does not flash

Check indoor/outdoor controller boards connection cable for erroneous wiring. (S1 and S2 or S3 open)

2) Flashes

Indoor/outdoor contorller boards connection cable is normal.

(1) Normal operation.

(1) Check pair number setting. (2) Item check of item 1.

(1) Normal operation. (2) Normal operation. (3) Item check of item 2.

(1) - When there is leakage, discharge tempera-

ture rises. Therefore, check by measuring temperature.

- Check for gas leakage from piping connections, etc.

(2) Open intake grille and check filter. Clean filter,

and remove dust and dirt.

(3) - Since both indoor-side piping temperature

and outlet pressure rise when filter clogged, judge by measuring outlet pressure.

- Clean heat exchanger. (4) Remove obstruction. (5)

Check refrigerant circuit operation state.

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Symptom and operation when normal

7. Remote controller display is normal and heating operation is performed

but without any capacity (does no

heat).

Cause

(1) Insufficient refrigerant. (2) Refrigerant piping heat insulation insuf-

ficient. (3) Filter clogged. (4) Indoor-side heat exchanger clogged. (5) Air duct short cycle. (6) LEV malfunction

Symptom judgment and remedy

(1) - Since the discharge temperature rises when

there is leakage, judge by measuring the temperature.

- Check piping connections, etc. for gas leakage.

(2) Check heat insulation. (3) Open intake grille and check filter.

Clean filter, and remove dust and dirt.

(4) - Since the indoor-side piping temperature

and outlet pressure rise when the heat exchanger is clogged, judge by measuring the outlet pressure.

- Clean heat exchanger.

(5) Remove obstruction. (6)

Check refrigerant circuit operation state.

Page 77

- 73 -

C Test run

[1] Before test run

The test run can be carried out either from the unit or remote controller.

1. Check list

[2] Test run procedures

1. PRH-P8, 10, 16, 20MYA (Remote controller: PAR-20MAA)

Operating procedures

(A)

(5)

(2)

(3)

• After wiring of units are complete, check that refrigerant is not leaking, the power and control wires are not loose, and the poles are not reversed.

• Use a 500 V insulation resistance tester to make sure that the resistance between the power terminal and the ground is 1.0 MΩ or more. If it is less than 1.0 MΩ, do not operate the unit.

• Make sure there is no malfunction in the unit. (If there is a malfunction, you can diagnose it using LED1 on the outdoor-side controller board.)

• Check the electrical power phase. If the phase is reversed, the fan may rotate in the wrong direction or stop, or unusual sounds may be produced.

• Starting at least 12 hours before the test run, send current through the crankcase heater. (If the current is running for a shorter period of time, damage to the compressor could result.)

• For specific models requiring changing of settings for selection of power supply ON/OFF capability, make proper changes referring to the description for Selection of Functions through Remote Controller.

After the above checks are complete, carry out the test run as indicated in the following outline.

(1) Turn on the main power supply

While the room temperature display on the remote controller reads “CENTRALLY CONTROLLED”, the remote controller is disabled. Turn off the “CENTRALLY CONTROLLED” display before using the remote controller.

(2) Press “TEST RUN” button twice

(A) The “TEST RUN” indicator should light up.

(3) Press button

Cooling mode: Cool air should start to blow. Heating mode: Warm air should start to blow (after a while).

(4) Press button

Check for correct motion of auto-vanes.

(5) Check the outdoor-side fan for correct running

The unit features automatic capacity control to provide optimum outdoor-side fan speeds. The fan keeps running at a low speed to meet the current outside air condition unless it exceeds its available maximum power. Then, in actuality, the fan may stop or run in the reverse direction depending on the outside air, which does not mean malfunction.

STAND BY DEFROST

CENTRALLY CONTROLLED

CHECK

ßC

TEMP.

CLOCK

ERROR CODE

ON OFF

1Hr.

NOT AVAILABLE

ßC

FILTER

CHECK MODE

TEST RUN FUNCTION

ON/OFF

FILTER

PAR-20MAA

CHECK TEST

TIMER SET

Page 78

- 74 -

(6) Press the “ON/OFF” button to reset the test run in progress

• The test run will be automatically shut down after two hours in response to the AUTO STOP setting of two hours

on the timer.

• During the test run, the room temperature display shows the unit indoor-side liquid piping temperatures.

• In the case of the test run, the OFF timer will activate, and the test run will automatically stop after two hours.

• The room temperature display section shows the control temperature for the units during the test run.

• Check that the units are running properly operation.

Malfunctions may not be displayed even if the wiring is incorrect. (*1) After turning ON the power, the system will go into startup mode, and the remote controller operation lamp (red) and the room temperature display section’s “H0” will flash. Also, in the case of the indoor-side controller board substrata LEDs, LED 1 and LED 2 light up (when address is 0) or become dim (when address is not 0), and LED 3 flashes. In the case of the outdoor-side controller board substrata LED 1 display, and are displayed alternatively at 1-second intervals.

• If one of the above operations does not function correctly, the following causes should be considered, and if applicable, dealt with. (The following symptoms have been determined under test run mode. Note that “startup” in the chart means the *1 display above.)

– –

Symptoms

Remote Controller Display Outdoor Substrate LED Display

Cause

Remote controller is displaying “H0”, and operation is not possible. After power is turned ON, “H0” is displayed for 3 mins., then error code is displayed.

Power is turned ON, and “EE” or “EF” are displayed after “H0” is displayed.

Display messages do not appear even when remote controller operation switch is turned ON (operation lamp does not light up).

Operation display appears but soon disappears even when remote controller operations are executed.

After “startup” display, “00” is displayed (correct operation). After “startup” display, error code is displayed.

After “startup” display, “F1” (negative phase) is displayed. After “startup” display, “00” or “EE” is displayed (“EE” is displayed when a test run is made). After “startup” display, “EA” (error for number of units) or “Eb” (unit number error) is displayed. After “startup” display, “00” is displayed (correct operation). After “startup” display, “00” is displayed (correct operation). After “startup” display, “00” is displayed (correct operation).

• After power is turned ON, system startup lasts for about 2 mins., and “H0” is displayed (correct operation).

• Outdoor-side unit’s safeguard installation connector is open.

• Negative phase and open phase of outdoor unit’s power terminal board

(Single phase: L, N,

/triple phase: L1, L2, L3, N, )

• Incorrect connection of outdoor terminal board (Single phase: L, N,

triple phase: L1, L2, L3, N,

grounding and S1, S2, S3)

• Unit construction differ

• Wiring for the unit is not connected correctly. (Polarity is wrong for S1, S2,

S3)

• Remote controller transmission wire short

• There is no unit for address 0 (address is something other than 0).

• Remote controller transmission wire burnout

• After cancellation of function selection, operation is not possible for about

30 secs. (correct operation).

* Press the remote controller’s “CHECK” button twice consecutively to be able to run a self diagnosis. See the chart below for content of error code displays.

LCD Nonconformity Content

E6 ~ EF Signal error between indoor-side controller

board and outdoor-side controller board

- - - - No error history

FFFF No relevant unit

LCD Nonconformity Content LCD Nonconformity Content

P8 Pipe temperature error

P9 Piping (2-phase pipe) sensor error U0 ~ UP Unit nonconformity F1 ~ FA Unit nonconformity E0 ~ E5 Signal error between remote controller and

unit

P1 Suction sensor error P2 Piping (liquid pipe) sensor error P4 Drain sensor error P5 Drain overflow safeguard operation P6 Freezing/overheating safeguard operation

See the chart below for details of the LED displays (LED 1, 2, 3) on the indoor-side controller board.

LED 1 (microcomputer power supply) Displays the ON/OFF of power for control. Check that this is lit during normal use. LED 2 (remote controller feed) Displays the ON/OFF of feed to wired remote controller. Is only lit for the unit of outdoor-side controller board with address “00”. LED 3 (indoor and outdoor signals) Displays signal between indoor-side and outdoor-side controller boards. Check that this is flashing during normal use.

Page 79

ON/OFF

TEMP.

˚C

“CENTRALLY CONTROLLED”

indicator

1 Turn on the main power supply

While the display on the remote controller indicates “

”, the remote controller

is disabled. Turn off the “

” indicator before using the remote controller.

2 Press the [TEST] button twice successively within three seconds. Test

run starts.

“TEST RUN” and “OPERATION MODE” are displayed alternately.

3 Press [

] button

Cooling/drying mode: Cool air should start to blow.

Heating mode: Warm air should start to blow (after a while).

4 Check the outdoor unit fan for correct running

The outdoor unit features automatic capacity control to provide optimum fan speeds. The fan keeps running at a low speed to meet the current outside air condition unless it exceeds its available maximum power. Then, in actuality, the fan may stop or run in the reverse direction depending on the outside air, which does not mean malfunction.

5 Press the [

ON/OFF] button to reset the test run in progress

• The test run will be automatically shut down after two hours in response to the AUTO STOP setting of two hours on the timer.

• During the test run, the room temperature display shows the indoor unit tubing temperatures.

• In the case of the test run, the OFF timer will activate, and the test run will automatically stop after two hours.

• The room temperature display section shows the control temperature for the indoor units during the test run.

• Check that all the indoor units are running properly for simultaneous twin and triple operation. Malfunctions may not be displayed even if the wiring is incorrect.

6 Register a telephone number

The telephone number of the repair shop, sales office, etc., to contact if an error occurs can be registered in the remote controller. The telephone number will be displayed when an error occurs. For registration procedures, refer to Function selection of remote controller. (Page11)

Operation mode display “TEST RUN” and “OPERATION MODE” are displayed alternately.

Timer stops test run after two hours.

Piping temperature display

Stop test run by pressing the [

ON/OFF] button.

During test run, the RUN lamp remains on. [TEST] button [

] button

(*1) After turning ON the power, the system will go into startup mode, and the remote controller operation lamp (green) and the display section’s “PLEASE WAIT” will flash. Also, in the case of the indoor substrate LEDs, LED 1 and LED 2 light up (when address is 0) or become dim (when address is not 0), and LED 3 flashes. In the case of the outdoor substrate LED display,

and are displayed

alternatively at 1-second intervals.

Symptoms

Remote Controller Display Outdoor Substrate LED Display

Cause

Remote controller is displaying “PLEASE WAIT”, and operation is not possible. After power is turned ON, “PLEASE WAIT” is dis- played for 3 mins., then error code is displayed.

Power is turned ON, and “EE” or “EF” are displayed after “PLEASE WAIT” is displayed.

Display messages do not appear even when remote controller operation switch is turned ON (operation lamp does not light up).

Operation display appears but soon disappears even when remote controller operations are executed.

After “startup” display, “00” is displayed (correct operation). After “startup” display, error code is displayed.

• After power is turned ON, system startup lasts for about 2 mins., and “PLEASE WAIT” is displayed (correct operation).

• Outdoor unit’s safeguard installation connector is open.

• Negative phase and open phase of outdoor unit’s power terminal board

(Single phase: L, N,

/triple phase: L1, L2, L3, N, )

• Incorrect connection of outdoor terminal board (Single phase: L, N,

triple phase: L1, L2, L3, N,

grounding and S1, S2, S3)

• Outdoor unit and indoor unit construction differ

• Wiring for the indoor and outdoor unit is not connected correctly. (Polarity

is wrong for S1, S2, S3)

• Remote controller transmission wire short

• There is no outdoor unit for address 0 (address is something other than

0).

• Remote controller transmission wire burnout

• After cancellation of function selection, operation is not possible for about

30 secs. (correct operation).

˚C

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

2. PRH-P200, 250, 400, 500MYA (Remote controller: PAR-21MAA)

Operating procedures

- 75 -

Page 80

* Press the remote controller’s “CHECK” button twice consecutively to be able to run a self-check. See the chart below for content of error code displays.

LCD Nonconformity Content

E6 ~ EF Signal error between indoor and outdoor

units

- - - - No error history

FFFF No relevant unit

LCD Nonconformity Content LCD Nonconformity Content

P8 Tube temperature error P9

Open/short in condenser/evaporator temp thermistor

U0 ~ UP Outdoor unit nonconformity

F1 ~ FA Outdoor unit nonconformity E0 ~ E5 Signal error between remote controller and

indoor unit

P1 Suction sensor error P2 Open/short in liquid temp thermistor P4 Drain sensor error P5 Drain overflow safeguard operation P6 Freezing/overheating safeguard operation

See the chart below for details of the LED displays (LED 1, 2, 3) on the indoor substrate.

LED 1 (microcomputer power supply) Displays the ON/OFF of power for control. Check that this is lit during normal use. LED 2 (remote controller feed) Displays the ON/OFF of feed to wired remote controller. Is only lit for indoor unit linked to outdoor unit with address “00”. LED 3 (indoor and outdoor signals) Displays signal between indoor and outdoor units. Check that this is flashing during normal use.

3. Outdoor-side controller board

(1) Check Items

• After installation of unit, and electric wiring work,check that the unit is free from leaks loosened of refrigerant, connections,and incorrect polarity.

• Check that there is no negative phase and open phase. (The F1 message for negative phase and the F2 message for open phase will flash at LED 1 on the outdoor-side controller board substrate. If this happens,rewire correctly.)

• Measure the impedance between power terminals (Single phase: L, N, /triple phase: L1, L2, L3, N, ) and the ground with a 500 V Megger and check that it is 1.0 M or more. Do not operate the equipment if measurement is less than 1.0 M.

• When there is no error at the unit. (If there is an error at the unit, it can be evaluated at LED 1 [digital display] of the outdoor-side controller board.)

• After checking the above, execute the test run in accordance with the following.

- 76 -

Page 81

- 77 -

(2)

(3)

How to handle problems with the test run

est run start and finish

• Operation from the outdoor-side controller board Execute settings for test run start,finish and operation mode (cooling, heating) using the DIP switch SW 4 on the outdoor-side controller board substrate.

a) Set the operation mode (cooling, heating) using SW 4-2 b) Turn ON SW 4-1, The operation mode for SW 4-2 will be adhered to, and the test run will commence c) Turn OFF SW 4-1 to finish the test run

• There may be a faint knocking noise emitted from the proximity of the fan during the test run. This is torque fluctuation occurring due to control of fan revolutions. There is no problem with the product.

Note: The SW 4-2 operation mode cannot be changed during the test run. (To change test run mode, stop the equipment with As there are 2 circuits for PRH-P16, 20, 400, 500MYA, make the same setting on other outdoor-side controller boards.

SW 4-1, change the operation mode, then restart test run with SW 4-1.)

• If the 2-hour timer is set,the test run will stop automatically after 2 hours.

• During the test run,the room temperature display on the indoor-side will indicate the temperature of the indoor-side

piping.

cooling

run

<SW4>

heating

1 2

stop

OFF

Remote controller communication – reception error Remote controller communication – transmission error Remote controller communication – reception error Remote controller communication – transmission error Communication between indoor-side and outdoor-side controller boards – reception error Communication between indoor-side and outdoor-side controller boards – transmission error Communication between indoor-side and outdoor-side controller boards – reception error Communication between indoor-side and outdoor-side controller boards – transmission error Connection wiring error (interference, loose) Connection wiring error (interference, loose) Excessive time in use Serial communication error Serial communication error Reverse phase, out of phase verification Faulty input circuit Duplicated M-NET address setting M-NET error in PH/W transmission M-NET bus busy M-NET communication error with P transmission M-NET error – no ACK M-NET error- no response Undefined error code Discharge temperature error CN23 Short-circuit Connector Unplugged Open/short in discharge temp thermistor Open/short in liquid temp or condenser/evaporater temp thermistor Compressor overcurrent interruption (51C operation) High pressure error (63H1 operation) Low pressure error (63L operation) Power synchronous idle circuit error Inlet sensor error Piping (liquid pipe) sensor error Drain sensor error Drain overflow protector operation Water leak error Freeze prevention operation Surge prevention operation Piping temperature error

Piping (2-phase pipe) sensor error

Error details

Remote controller

display Remote Controller Remote Controller

Indoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board

M-NET board Outdoor-side controller board Outdoor-side controller board

M-NET board

–

Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Outdoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board Indoor-side controller board

6831,6834 6832,6833 6831,6834 6832,6833 6740,6843 6841,6842 6840,6843 6841,6842

6844 6845 6846 0403 0403 4103 4115 6600 6602 6603 6606 6607 6608

undefined

1102 1108 5104 5105 4101 1302 1300 4115 5101 5102 2503 2502 2500 1503 1504 1110 5103

E0 E3 E4 E5 E6 E7 E8

E9 EA EB EC ED EE

U6 UE

Error code list: details

MELANS displayProblem location

Page 82

- 78 -

[3] Self-diagnosis (PAR-20MAA)

Use the remote controller to look up the unit error history.

1. Change to self-diagnosis mode

Press the CHECK button twice within three seconds to show the following

2. Select the refrigerant address number to be selfdiagnosed

Press the buttons to scroll through the refrigerant address numbers (00 to 15)and select the refrigerant address number to be self-diagnosed. After three seconds from making the change,the lit refrigerant address to be self-diagnosed will start to flash,and selfdiagnosis will commence.

Item

Operation mode/relay output

Outdoor-side control condition

Indoor-side control condition

Error code history 1 Error code history 2

Display contents

tens place O: stop

C: cooling H: heating d: defrosting

units place 1: SV1 Relay output = SV1 + 21S4 + 52C

2: 21S4 4: 52C

Ex. During cooling mode, when 52C and

SV1 are ON: C5 When an error occurs, the error code and error signal (*1) are displayed in alternation. Control mode display system

The error code (ex. U8, UA) and error indicator (*1) are displayed in alternation.

• Depending on the position of the SW2 switch on the outdoor-side controller board, the segments light up to indicate the running

condition of the unit and the particulars of the check code.

SW2 setting

123456 000000

011110

010110

011100 111100

*1 Display system for error indicator

The indicator corresponds to the following numbers

0 .......... Outdoor-side

1 .......... Indoor-side

Indoor-side Outdoor-side

Nothing

(IC1)

Control mode

Indoor-side

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Freeze prevention

Surge prevention Compressor OFF

Display

0 1 2 3 4 5 6 7

Outdoor-side

←

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

ßC

CLOCK

ON OFF

STAND BY DEFROST

CHECK

INDOOR UNIT ADDRESS NO

CHECK

INDOOR UNIT ADDRESS NO

Page 83

- 79 -

4. Reset error history

Display the error history at the self-diagnosis result display screen

3. The address for self-diagnosis will flash when the button is pressed twice within three seconds. The diagram on the left will be displayed when error history has been reset. Note that the error content will be redisplayed if error history resetting is unsuccessful.

a) Alternating display

5. Canceling self-diagnosis

The following two methods can be used to cancel self-diagnosis. Press the CHECK button twice within three seconds to cancel self-diagnosis. The display screen will return to the status before self-diagnosis. Press the 1 ON/OFF button to cancel selfdiagnosis. The unit will stop. (This operation is ineffectual when operation is prohibited.)

CLOCK ON OFF

STAND BY DEFROST

INDOOR UNIT ADDRESS NO

ERROR CODE

CLOCK

ON OFF

ßC

1Hr.

ßC

CHECK MODE

FILTER

CHECK

FUNCTION

STAND BY DEFROST

INDOOR UNIT ADDRESS NO

ERROR CODE

CLOCK

ON OFF

ßC

1Hr.

ßC

CHECK MODE

FILTER

CHECK

FUNCTION

(2)

(3)

(2) When there is no error history

(3)

When the address does not exist

3. Self-diagnosis result display

See the above chart for details of error code contents. (1) When there is an error history

a) Alternating display b) Error code c) Attribute of error search d) Unit number

3. (1)

STAND BY DEFROST

CHECK

INDOOR UNIT ADDRESS NO

ßC

ON OFF

CLOCK

ERROR CODE

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

STAND BY DEFROST

CHECK

INDOOR UNIT ADDRESS NO

ßC

CLOCK

ON OFF

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

ßC

ON OFF

CLOCK

ERROR CODE

ON OFF

CLOCK

CHECK

STAND BY DEFROST

INDOOR UNIT ADDRESS NO

CHECK

INDOOR UNIT ADDRESS NO

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

ßC

CLOCK

ON OFF

CHECK

STAND BY DEFROST

INDOOR UNIT ADDRESS NO

STAND BY DEFROST

CHECK

INDOOR UNIT ADDRESS NO

ßC

ON OFF

CLOCK

ERROR CODE

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

Page 84

Retrieve the error history of each unit using the remote controller.

1 Switch to the self check mode.

When the H [CHECK] button is pressed twice successively within three seconds, the display shown below appears.

2 Set the address or refrigerant address No. you want to self check.

When the F [

TEMP. ( ) and ( )] buttons are pressed, the address decreases and increases between 01 and 50 or 00 and 15. Set it to the address No. or refrigerant address No. you want to self check.

Approximately three seconds after the change operation, the self check refrigerant address changes from flashing to a steady light and self check begins.

Self check address or self check refrigerant address

3 Self check result display <Error history> (For the contents of the error code, refer to 13. Troubleshooting, error code list.)

4 Error history reset

The error history is displayed in 3 Self check results display.

5 Self check reset

There are the following two ways of resetting self check. Press the H [CHECK] button twice successively within three seconds

→ Resets self check and returns to the state before self check.

Press the I [

ON/OFF] button → Self check resets and indoor units stop.

(When operation is prohibited, this operation is ineffective.)

Error code 4 digits or error code 2 digits

Address 3 digits or unit address No. 2 digits

When the D [ MENU] button is pressed twice successively within three seconds, the self check address or refrigerant address flashes.

When the error history was reset, the display shown below appears. When error history reset failed, the error contents are displayed again.

ERROR CODE

ERROR CODE ERROR CODE

ERROR CODE

[4] Self-diagnosis (PAR-21MAA)

- 80 -

Page 85

- 81 -

1. First, check the electricity current marker

If the correct voltage (DC 12 V) is not displayed on the remote controller, the electric current marker will be lit. If the electricity current marker is not lit, check the remote controller wiring and the unit.

(1) Electric current marker

2. Transfer to remote control mode

Hold down the CHECK button for five seconds or more to display the diagram on the left. Press the FILTER button to commence diagnosis of remote controller.

3. Remote controller diagnosis results

(1) The remote control is functioning correctly.

Check other possible causes as there are no problems with the remote controller.

(2) The remote controller has a nonconformity.

The remote controller must be replaced. Error display 1 (“NG”) flashes to show a nonconformity in the transmitter-receiver circuit.

Potential problems other than those diagnosed for the remote controller.

(1) Single transmission not possible if error display 2 (“E3”)

flashes. There is “noise” on the transmission line, or damage of other remote controllers for the units can be considered. Check the transmission path and other controllers.

(2) Data error has occurred when error display three shows

“ERC” and number of data errors. Number of generated data errors (maximum 66 errors). The number of generated data errors stands for the difference in the number of bits of transmitted data from the remote controller and the actual number of bits that were transmitted along the transmission path. If this error occurs, “noise”, etc., is interfering with the transmission data. Check the transmission path.

[5] Remote controller diagnosis (PAR-20MAA)

If operation cannot be carried out from the remote controller,use this function to

diagnose the remote controller.

3. (1)

(2)

(1)

(2)

4. Cancel the remote controller diagnosis

Hold down the CHECK button for five seconds or more to cancel the remote controller diagnosis. The “H0” operation lamp will flash, and the display screen will return to the status before remote controller diagnosis in approximately 30 seconds.

L) Remote controller transmission data

M) Transmission data at transmission path

K) When the number of data

errors generated is 02

ßC

CLOCK

ON OFF

CLOCK

STAND BY DEFROST

INDOOR UNIT ADDRESS NO

(1)

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

1Hr.

ßC

FILTER

CHECK MODE

FUNCTION

ßC

CLOCK

ON OFF

CHECK

STAND BY DEFROST

INDOOR UNIT ADDRESS NO

1Hr.

ßC

CHECK MODE

FUNCTION

ßC

CHECK MODE

FUNCTION

FILTER

STAND BY DEFROST

CHECK

INDOOR UNIT ADDRESS NO

CHECK

INDOOR UNIT ADDRESS NO

ßC

CLOCK

ON OFF

STAND BY DEFROST

1Hr.

CHECK

INDOOR UNIT ADDRESS NO

CHECK

INDOOR UNIT ADDRESS NO

CHECK

INDOOR UNIT ADDRESS NO

ßC

CLOCK

ON OFF

ßC

CHECK MODE

FUNCTION

ßC

CHECK MODE

ßC

CHECK MODE

FILTER

FUNCTION

FILTER

FUNCTION

Page 86

When remote controller is faulty (Error display 1) “NG” flashes

→ Remote controller send/receive circuit abnormal

Remote controller switching is necessary.

(Error display 3) “ERC” and data error count are displayed

→ Data error generation

“Data error count” is the difference between the number of bits of remote controller send data and the number of bits actually sent to the transmission line. In this case, the send data was disturbed by the noise, etc. Check the transmission line.

Send data on transmission line

When data error count is 02

Remote controller send data

3 Remote controller check result

When remote controller is normal

Since there is no problem at the remote controller, check for other causes.

When the problem is other than the checked remote controller (Error code 2) “E3” “6833” “6832” flash

→ Cannot send

There is noise on the transmission line, or the indoor unit or another remote controller is faulty. Check the transmission line and the other remote controllers.

4 Remote controller check reset

When the H [CHECK] button is held down for five seconds or longer, remote controller check resets and the “PLEASE WAIT” and RUN lamp flash. Approximately 30 seconds later, the remote controller returns to the state before remote controller check.

ERROR CODE

If operation cannot be carried out from the remote controller, use this function to diagnose the remote controller.

Power mark

1 First check the power mark.

When normal voltage (DC12V) is not applied to the remote controller, the power mark goes off. When the power mark is off, check the remote controller wiring and the indoor unit.

2 Switch to the remote controller check mode.

When the H [CHECK] button is held down for five seconds or longer, the display shown below appears.

When the A [FILTER] button is pressed, remote controller check begins.

[6] Remote controller check (PAR-21MAA)

- 82 -

Page 87

- 83 -

D INSTALLATION

All series of air conditioners are designed for outdoor installations and are to be placed on a slab or rooftop, however if the air conditioner is to be installed in a plant room application, please contact your equipment supplier prior to installation.

1. Basic space required A space of at least 250 mm is necessary at the back for inlet air. Taking servicing, etc. from the rear into account, a space of about 450 mm should be provided, the same as at the front.

2. When there is an obstruction above the unit

3. When unit is surrounded by walls

Note:

• Wall heights (H) of the front and the back sides shall be within overall height of unit.

• If the panel height is exceeded, add the “h” dimension to L

1 and

1: 450 L2: 250

Example: When h is 100,

the L

1 dimension becomes 450 + 100 = 550 mm.

4. Continuous installation

• Space required for collective installation and continuous installation: When installing several units, leave the space between each unit considering passage for air and people.

• Open in the two directions.

• In case wall height (H) exceeds overall height of unit, add “h” dimension (h = wall height <H> – overall height of unit) to * marked dimension.

[1] Space required around units

300

<A>

250

450

650

325

<A>

<A> Top view

Side view

A Front B Must be open C Wall height (H)

1: 450 L2: 250

250

450

• Models PRH-P8, 10, 200, 250MYA

Page 88

- 84 -

<A>

<C>

<A> Top view Front view <C> Side view

A Front B Must be open C Wall height (H)

1: 450 L2: 450 L3: 250

• Models PRH-P16, 20, 400, 500MYA

250

450

300

315

670

450

900

1. Basic space required

A space of at least 250 mm is necessary at the right side for inlet air. Taking servicing, etc. from the right side into account, a space of about 450 mm should be provided, the same as at the front and back.

2. When there is an obstruction above the unit

3. When unit is surrounded by walls

Note:

• Wall heights (H) of the front and the back sides shall be within overall height of unit panel.

• If the panel height is exceeded, add the “h” dimension to L

1, L2

and L

1: 450 L2: 450 L3: 250

Example: When h is 100,

the L

1 dimension becomes 450 + 100 = 550 mm.

4. Continuous installation

• Space required for continuous installation: When installing several units, leave the space between each unit considering passage for air and people.

• Open in the two directions.

• In case wall height (H) exceeds overall height of unit, add “h” dimension (h = wall height <H> – overall height of unit) to * marked dimension.

Page 89

- 85 -

Installation of the unit

• Fix unit tightly with bolts so that unit will not fall down due to earthquake or gust.

• Use concrete or angle for foundation of unit.

• Vibration may be transmitted to the installation section and noise and vibration may be generated from the

floor and walls, depending on the installation conditions. Therefore, provide ample vibrationproofing (cushion pads, cushion frame, etc.).

• Be sure that the corners are firmly seated. If the corners are not firmly seated, the installation feet may be bent.

•

When making foundation of unit, put a stander in the middle of unit base.

Warning:

• Be sure to install unit in a place strong enough to withstand its weight. Any lack of strength may cause unit to fall down, resulting in a personal injury.

• Have installation work in order to protect against a strong wind and earthquake. Any installation deficiency may cause unit to fall down, resulting in a personal injury.

When building the foundation, give full attention to the floor strength, drain water disposal <during operation, drain water flows out of the unit>, and wiring routes.

Down wiring precautions

When down wiring are performed, be sure that foundation and base work does not block the base through holes.

[2]

Bottom wiring through hole

(bolt hole)

A Bottom wiring through hole B (bolt hole)

2130952170

880

840

105

2200

144

611

155

2000

155 611

144

800

ø50.8

800

ø25.4 ø38.1

ø25.4

Stander

• Models PRH-P8, 10, 200, 250MYA

• Models PRH-P16, 20, 400, 500MYA

A M10 anchor bolt procured

at the site.

B Corner is not seated.

A M10 anchor bolt procured

at the site.

B Corner is not seated.

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- 86 -

1. In case of side flow unit (factory setting) is equipped with horizontal supply and return air openings. Duct connection to the unit should be made with duct flanges and secured directly to the air openings with flexible duct connectors to avoid normal noise transmission.

2. For vertical air supply, a field supply plenum should be used. The figure above shows the recommended method for duct connection.

3. In case of top flow unit (modified when installed) is equipped with vertical supply and horizontal return air openings. Duct connection to the unit should be made with duct flanges and securely attached to the air openings with flexible duct connectors.

4. To prevent air leakage, all duct seams should be taped. Ducts run in air spaces that are not air-conditioned must be insulated and provided with a vapor barrier. Ducts exposed to the outside must be weather proofed. For quiet operation, we recommend that the insulation on the supply duct be placed inside, lining the duct.

5. Where ducts from the outside enter a building, the duct openings in the building should be sealed with weather stripping to prevent rain, duct, sand, etc. from entering the building.

6. Fans will not accept any external resistance to airflow and what provision is available if ductwork is to be fitted to the external fans.

7. Correctly sized filters must be fitted and there is no provision within the unit, however the filters (field supply) may be installed in the return air.

8. Duct earth wiring must be connected to the earth point of unit ( mark point).

Caution:

•

Do not step on the unit.

-Step on the unit may deform top panel and result in injury.

• Outlet duct is 850 mm or more necessary to construct.

• To connect the air conditioner main body and the duct for potential equalization.

• In case of top flow unit (PRH-P16MYA/P20MYA/P400MYA/P500MYA) keep 500mm or more for canvas

duct space.

[3] Duct construction

• Models PRH-P8, 10, 200, 250MYA

• Models PRH-P16, 20, 400, 500MYA

<A>

500

<A> Ex. Side flow

Ex. Top flow

A Duct

Canvas duct (Keep 500mm or more for canvas duct space)

I Top panel

B Roof curb C Single duct divider D Plenum divider E Insulator

K 850 mm or more

eep duct-w

G Rainproof the part where the

duct flange is screwed on (Top flow only).

ork length

<A>

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- 87 -

[4] Lifting method

Caution:

• Be very careful to carry product.

- Do not have only one person to carry product if it is more than 20 kg.

- PP bands are used to pack some products. Do not use them as a mean for transportation because they are dangerous.

- Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.

- Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging bag may suffocate children to death.

- When carrying in outdoor unit, be sure to support it at four points. Carrying in and lifting with 3-point support may make outdoor unit unstable, resulting in a fall of it.

• Protect the corners on the unit that come in contact with the sling with padding.

• Models PRH-P8, 10, 200, 250MYA

• Models PRH-P16, 20, 400, 500MYA

14 m

Page 92

- 88 -

[5] Drain piping

1. The condensate drain socket (R1) is provided. The drain pipe is connected to the drain socket.

2. The drain pipe must be provided with a trap on the outside of the unit and also installed at an incline for proper drainage, as shown in the figures above.

3. To prevent dew condensation and leakage, provide drain pipes with insulation.

4. Upon completion of the piping work, check that there is no leakage and that the water drains off properly.

A Drain piping B Socket R1 C Drain trap D The drain pipe should e

below the level.

xtend

> =

2 × External static pressure

> =

2 × E

1399

• Models PRH-P8, 10, 200, 250MYA • Models PRH-P16, 20, 400, 500MYA

1549

Page 93

- 89 -

[6] Modification method of fan direction (From side flow to top flow)

This product can be changed from side flow to top flow in the field. Modify if necessary as follows.

1 Remove the top panel A, cover (outer side) B, flange C, panel D and cover (inner side) F. (STEP 1) 2 Modify the fan E direction. (STEP 2)

When working with the fan E suspended, do not rope the shaft of the fan.

3 Re-install the top panel A, cover B, flange C and panel D. (STEP 3)

*Between flange C, top panel A, and screw fittings should be adequately waterproofed.

Note:

• In the case of top flow, the inner cover F is not necessary.

• Models PRH-P8, 10, 200, 250MYA

• Models PRH-P16, 20, 400, 500MYA

STEP 3STEP 1 STEP 2

E Fan F Cover (inner side) ········ 2pcsD PanelA Top panel B Cover (outer side) C Flange

ABF

Page 94

- 90 -

[7] The putting condition of the belt

figure2 Belt tensionfigure1 Parallel degree of pulley

pulley

parallel angle

pulley

K ( )

10 or less gap of 3mm every 1m

note

table 1

Flexion load(W)

A=0.016xC(mm)

type

135

22 29

Flexion load W (N)

table 2

smaller out diameter (mm)

136 160 161

27 34 29 37

pulley

1. Set the parallel angle of the fan and the motor pulley as shown in the table and figure 1 below.

2. Set the tension of the per one belt when the flexion load is within the range as shown in the figure 1 and table 2 below at the proper flexion. (A = 0.016 × C mm)

3. Adjust the suitable tension after the belt sit properly across the pulley (after more 24-28 hours working). When the new belt is used, adjust the suitable tension about the 1.3 times of the maximum value of the flexion load.

4. Readjust the belt every 2,000 hours after the first adjustment. Exchange the belt when the belt’s surroundings length has expanded by 2% including the first expansion of the belt. (about 1%) (about 8,000 hours converted working time)

Page 95

Page 96

New publication, effective Apr. 2007.

Specifications subject to change without notice.

HWE07090

Printed in Malaysia

Mitsubishi PRH-P8(200)MYA, PRH-P10(250)MYA, PRH-P16(400)MYA, PRH-P20(500)MYA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual