Fujitsu WPYA100LA, WPYA080LA Service Manual

AIR TO WATER HEAT PUMP

MONOBLOC

type

CONTENTS

SPECIFICATION

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

2

FUNCTION

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

4

OPERATION DETAILS

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

5

TROBLESHOOTING GUIDE

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

6

PARTS LIST

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

14ELECTRIC CIRCUIT DIAGRAM

. . . . . . . . .

15EXPLODED VIEW

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

16

DISASSEMBLY PROCESS

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

18

Models

Outdoor unit

WPYA100LA

WPYA080LA

SPECIFICATION

– 2 –

Specications are subject to change without notice. •

Unit

kWCooling Capacity

kWHeating Capacity

phase

Power source

Single

V

230

Hz

50

OUTLET

Airow Method

TOP VIEW

INTAKE

W

Electrical Data

Input

Running Current
(MAX.)

Cooling ;
Heating ;

A

Height

Width

Depth

Number of core-wirePower Cord core-wire / 3.5~4.0mm

2

mm

Dimensions

mm

mm

kg

Net Weight

WPYA100LA

7.1

10.0

Water Pipe Size

Out ;

Return ;

R1(25A)
R1(25A)

2060
2300

Cooling ;
Heating ;

9.2(14.5)

10.2(18.3)

881.5

850

330

82

Air Circulation

Propeller Fan

100

DC brushless (8-pole)

W

Heat Exchanger

18.1 FPI

Expansion Valve

Plate n conguration,forced draft

Refrigerant Control Device

g

Refrigerant (R410A )

1500

Thermostat

Type

Motor Type

Rated Output

Electronic Control

SPECIFICATION

– 3 –

Specications are subject to change without notice. •

Unit

kWCooling Capacity

kWHeating Capacity

phase

Power source

Single

V

230

Hz

50

OUTLET

Airow Method

TOP VIEW

INTAKE

W

Electrical Data

Input

Running Current
(MAX.)

Cooling ;
Heating ;

A

Height

Width

Depth

Number of core-wirePower Cord core-wire / 3.5~4.0mm

2

mm

Dimensions

mm

mm

kg

Net Weight

WPYA080LA

6.4

8.0

Water Pipe Size

Out ;

Return ;

R1(25A)
R1(25A)

1780
1780

Cooling ;
Heating ;

8.0(13.1)

8.0(16.1)

881.5

850

330

82

Air Circulation

Propeller Fan

100

DC brushless (8-pole)

W

Heat Exchanger

18.1 FPI

Expansion Valve

Plate n conguration,forced draft

Refrigerant Control Device

g

Refrigerant (R410A )

1500

Thermostat

Type

Motor Type

Rated Output

Electronic Control

– 4 –

FUNCTIONS

Inverter control reduce the ON/OFF times of compressor, so
can keep the water temperature changeless during opera­tion.

Inverter control

Cold water mode.
Hot water mode.

Operation mode

Inverter control can operate with less electricity consumption
than normal air to water heat pump.

Electricity consumption

Defrosting operation is controlled by the temperature of
outdoor heat exchanger sensed by the thermistor.

Defrost control

Anti-freeze operation automatically starts when the outdoor
temperature is lower than 2°C.

Anti-freezing control for the circulation water

Restarting is inhibited for approximately 3 minutes.

Time delay safety control

UNIT

– 5 –

OPERATION DETAILS

DEFROSTING OPERATION(FOR A UNIT HEAT EXCHANGER)

-1.5˚C

Defrosting starts

Defrosting stop

Temperature of
outdoor heat exchanger

2min.

19˚C

Compressor

Outdoor fan

4way valve

ON

ON

ON

ON

OFF

50sec.

50sec.

Max 12min. 53sec.53sec.

10

sec.

OFF

ON

MAX 90Hz

Defrosting operation is controlled by the temperature of outdoor heat exchanger sensed by the thermistor and •
the timer switch.
Defrosting operation starts when the both of the following conditions are met at the same time. •
a)35 minutes’ of continuous run of the compressor after the start of heating operation or after the completion of
previous defrosting operation.
b)The temperature of the outdoor heat exchanger stays lower than -1.5°C continuously for two minutes.
Defrosting operating is called o if either of the following conditions is met. •
a)The temperature of outdoor heat exchanger rises to 19°C while 4-way-valve is ON.
b)12 minutes has passed since compressor turned ON.

Working condition of frost protection heater for expansion vessel •

The heater turns ON if the outdoor temperature keeps below 3 degree for 1 minute.
The heater turns OFF if the outdoor temperature keeps above 5 degree for 1 minute.

– 6 –

TROUBLESHOOTING GUIDE

FOR YOUR SAFETY USE

For the safety and proper use and handling of the product, please read and follow the instructions carefully. •
The meaning of the marks below are as follows. •

Never remodel appliance. •
Use designated parts or accessories to avoid accidents.

In case of gas leakage, not only rell the required amount of the refrigerant gas but also •
nd out the gas leakage point and mend it. If the service work has to be suspended
before mending the leakage points, be sure to collect the refrigerant gas in the unit by
using pump then fasten the service ports to avoid any further leakage. Poisonous gas
may be generated when the leaked refrigerant is exposed to re.

Be sure to change the cable if it is damaged. •
Do not use damaged cable.

Do not use power supply cord extended or connected in halfway. •

Be sure to put the units to earthing works. •

Be sure to check the insulated resistance, more than 1M Ω. •

Warning

Check

Point

Check
Point

If leakage of refrigerant occur in the installation, ventilate a room. •
If the leaked refrigerant is exposed re, poisonous gas may be generated.

Danger

Boosting capacitor make the control box assembly high voltage. •
Make the capacitor discharge enough when servicing. Otherwise will be struck by elec­tricity.

Improper use will cause the signicant risk of death or serious injury of the user.

Improper use may cause the risk of death or serious injury of the user.

Danger

Warning

Please refer the marks below. •

Caution ProhibitedHigh Voltage

Strict enforcement Connect the earthing cable

– 7 –

TROUBLESHOOTING GUIDE

ERROR CODES

The error codes displayed on the unit display board indicate the location of the breakdown or abnormality.

APPEARANCE, PORTION, PARTS SEEMED WRONG

check the power supply

check the electric continuity by tester [see g. 1]

METHOD OF CHECK TROUBLESHOOTING

POWER SUPPLY

FUSE CF3 (250V T5A)

check the electric continuity by tester [see g. 1]FUSE CF1 (250V T25A)

Discharge

temperature Error

check the service valve and refrigerant circuit (pipe)

check the resistance by tester [see table 1]

check the resistance by tester [see table 2]

CT disconnection

protective action

against excess

current AC current

detection

check the power voltage (230V)

GAS LEAKAGE

check the place of installation (blockage of air inlet & outlet )

check the excess gas

UNREASONABLE OPERATION

UNDER OVERLOAD

PCB (CONTROLLER)

DROP OF POWER VOLTA GE

MOMENTARY STOP OF POWER

(IN CASE OF LIGHTNING)

A1

A3

A4

DC voltage Error

FUSE CF4 (250V T3.15A)

FAN MOTORA0POWER MODULE

take o the terminals (orange and blue) and check the resistance between

orange-blue if the resistance is over 100kΩ, POWER MODULE is normal

POWER SUPPLY check the power supply

(*1) When checking fan motor and/or pump, turn o the power supply completely and touch their terminal or connector

take o the connector 9 , and check the resistance between red-black

in the connector if the resistance is over 100kΩ, FAN MOTER is normal

SENSOR, TEMP. SUCTION

SENSOR, TEMP. DISCHARGE

abnormal revolution

of compressor

A5

POWER MODULE

protective action

against excess current DC current

detection

check the place of installation (blockage of air inlet & outlet )

check the excess gas

check the power voltage (230V)

UNREASONABLE OPERATION

UNDER OVERLOAD

DROP OF POWER VOLTA GE

FUSE CF2 (250V T15A)

other than described above

check the electric continuity FUSE CF2 (250V T15A) by tester

A2

POWER MODULE

COMPRESSOR

operate without the junction connector of compressor lead wire

check the place of installation (blockage of air inlet & outlet )

check the excess gas

check the power voltage (230V)

UNREASONABLE OPERATION

UNDER OVERLOAD

DROP OF POWER VOLTA GE

FUSE CF2 (250V T15A)

check the electric continuity FUSE CF2 (250V T15A) by tester

COMPRESSOR other than described above

check the resistance of POWER MODULE by tester

take off the junction connector of compressor lead wire

measure resistance between the connector pins of junction connector, six

times between white-black, black-red, red-white respectively by changing

the polarity

if all the figures show over 100kΩ, POWER MODULE is normal

conrm the power supply.

if CF3 is blown, it should be replaced and check if there is a short-circuit at a connector

of the 4-way valve coil, the heater for tank, or the circulation pump. [see g 4,5,6]

if a short-circuit is found, the parts should be replaced.

if CF1 is blown, PCB(CONTROLLER) should be replaced and check the resistances

between pink-gray and orange-blue in the connector of POWER MODULE. [see g 7]

if these values are below 100kΩ , POWER MODULE should be replaced.

collect refrigerant once, then recharge with prescribed mass.

SENSOR, TEMP. SUCTION should be replaced.

SENSOR, TEMP. DEFROST should be replaced.

PCB(CONTROLLER) should be replaced.

ensure the installation position to avoid blockage of air inlet & outlet.

conrm the power supply voltage. (230V)

restart operation.

if excess gas is observed, collect all refrigerant once, then recharge with

prescribed mass.

if these values are below 100kΩ, POWER MODULE should be replaced.

if FAN MOTOR is abnormal, it should be replaced. and check the electric continuty

fuse CF4 by tester . [see g 2]

if CF4 is blown

, it should be replaced.

conrm the power supply.

ensure the installation position to avoid blockage of air inlet & outlet.

if excess gas is observed, collect all refrigerant once, then recharge with

prescribed mass.

COMPRESSOR should be replaced.

if CF2 is blown, PCB(CONTROLLER) should be replaced.

COMPRESSOR should be replaced.

if the same error code appears again, POWER MODULE should be replaced.

conrm the power supply voltage. (230V)

ensure the installation position to avoid blockage of air inlet & outlet.

if excess gas is observed, collect all refrigerant once, then recharge with

prescribed mass.

conrm the power supply voltage (230V)

if any of these values is below 100kΩ, POWER MODULE should be replaced.

if CF2 is blown, POWER MODULE and PCB(CONTROLLER) should be replaced.

ERROR

CODES

UNIT

– 8 –

TROUBLESHOOTING GUIDE

ERROR CODES

Pump Error

CLOGGED THE CIRCULATION

PUMP AND/OR HEATING CIECUIT

check the pump and heating circuit

PUMP

PCB (CONTROLLER) (*1)

P1

low-outside air

temperature limit

THE OUTDOOR TEMP. FALLS

BELOW -20°C

below -20°C, it is likely not to operate for the protection of the

equipment

U5

SENSOR TEMP. OUTDOOR check the resistance by tester [see table 1]

not cool down

not warm up

check the resistance by tester [see table 1]

SENSOR,TEMP. OUTGOING AND

RETURN CIRCULATING WATER

GAS LEAKAGE check the service valve and refrigerant circuit ( pipe )

CLOGGED HEATING CIRCUIT

check temperature dierence heating ow/return [see page 11]

large dierence meens ow rate is too low

SHORT CYCLE

(INSUFFICIENT AIR CIRCULATION)

check the blockage of air inlet & outlet

(*1) When checking fan motor and/or pump, turn o the power supply completely and touch their terminal or connector.

(*2) In case of detecting open circuit of the discharge temperature thermistor, error display appears 10 minutes after start op erating.

In case of detecting short circuit of the discharge temperature thermistor, error display appears immediately.

check the voltage of PUMP [see g. 3]

4-WAY VALVE check the resistance by tester [see g. 4]

APPEARANCE, PORTION, PARTS SEEMED WRONG METHOD OF CHECK

Inverter PCB

serial error

CONNECTOR 13 is RARE CONTACT

or POWER MODULE and

PCB(CONTROLLER)

Turn o the power supply , wait for about 3 minutes

take o and insert the connector 13 , and then power up again

after replacing POWER MODULE, restart operation again

Return circulating

water temp.

sensor Error

SENSOR, TEMP. RETURN

CIRCULATING WATER

check the resistance by tester [see table 1] E5

C8

Outgoing circulating

temp. sensor Error

SENSOR, TEMP. OUTGOING

CIRCULATING WATER

check the resistance by tester [see table 1]E4

Heat pump

regulator PCB

serial error

CC

MIS-WIRING (I/F PCB-HEAT PUMP

REGULATOR) OR RARE CONTACT

check the wiring connection and rare contact

I/F PCB other than described above

other than described above

remove the clog, then restart operation.

When the temperature rises, the unit automatically restarts the operation.

if the sensor is faulty, it should be replaced.

if any of these sensors is faulty, it should be replaced.

after xing the leakage point, collect the refrigerant once, then recharge with

prescribed mass.

remove the clog, then restart operation.

ensure the installation position to avoid blockage of air inlet & outlet.

if the voltage is normal, PUMP should be replaced.

if the voltage is abnormal, PCB(CONTROLLER) should be replaced.

if the value is abnormal, the coil should be replaced.

if the same error code appears, POWER MODULE should be replaced.

if the same error code appears, PCB(CONTROLLER) should be replaced.

if the sensor is faulty, it should be replaced.

if the sensor is faulty, it should be replaced.

check wiring connection and rate contact.

then restart operation.

I/F PCB should be replaced.

HEAT PUMP REGULATOR PCB should be replaced.Heat pump regulator

PCB (CONTROLLER)

FUSE CF4 (250V T3.15A)

FAN MOTOR (*1)

Fan motor

ErrorC3rise of temperature

(above 110°C)

of POWER MODULE

Power module

sensor Error

check the place of installation (blockage of air inlet & outlet)

SENSOR, TEMP. POWER MODULE

MIS-INSTALLATION

C4

C5

C6

I/F PCB serial errorC7

MIS-WIRING [ PCB ( CONTROLLER )

- I/F PCB CONNECTING CABLE ] OR

RARE CONTACT

check the wiring connection and rare contact

other than described aboveI/F PCB

PCB (CONTROLLER)

check the electric continuity FUSE CF4 (250V T3.15A) by tester

other than described above

SENSOR, TEMP. POWER MODULE

PCB (Controller)

Error

PCB (CONTROLLER)

POWER MODULE should be replaced.

ensure the installation position to avoid blockage of air inlet & outlet.

after correcting mis wiring, restart operation.

I/F PCB should be replaced.

if CF4 is blown, FAN MOTOR and CF4 should be replaced.

if CF4 is not blown, check the voltage of FAN MOTOR.[see g 2 ]

if the voltage is normal, FAN MOTOR should be replaced.

if the voltage is faulty, PCB(CONTROLLER) should be replaced.

POWER MODULE should be replaced.

PCB(CONTROLLER) should be replaced.

PCB(CONTROLLER) should be replaced.

Suction temp.

sensor Error

Outdoor temp.

sensor Error

check the resistance by tester [see table 1]

check the resistance by tester [see table 1]

check the resistance by tester [see table 1]

check the resistance by tester [see table 2] (*2)

SENSOR, TEMP. OUTDOOR

SENSOR, TEMP. SUCTION

Defrost temp.

sensor Error

SENSOR, TEMP. DEFROST

Discharge temp.

sensor Error

SENSOR, TEMP. DISCHARGE

A6

A7

A8

C2

Power module

Error

POWER MODULEC0

if the sensor is faulty, it should be replaced.

if the sensor is faulty, it should be replaced.

if the sensor is faulty, it should be replaced.

if the sensor is faulty, it should be replaced.

POWER MODULE should be replaced.

TROUBLESHOOTING

ERROR

CODES

UNIT

– 9 –

TROUBLESHOOTING GUIDE

ELECTRIC CHARACTER

[table 1] Sensor, temp. defrost
Sensor, temp. outdoor
Sensor, temp. suction
Sensor, temp. outgoing
and return circulating water

Temp.(°C) Resistance(kΩ)

0 31

5 24
10 19
15 15
20 12
25 10
30 8
35 6.7
40 5.5
45 4.6
50 3.8
55 3.2

[table 2] Sensor, temp. discharge

Temp.(°C) Resistance(kΩ)

10 1,000
20 600
35 300
40 250
50 160
80 50

DISPLAY OF ERRORS IN THE PAST

For a unit display board •

Press and hold the PUMP SW. and RESET SW. at the same time for 5 seconds to display a past error code and its
sequence number.
The PUMP SW. can then be used to select between a maximum of 8 past error codes to display. (If there are no er­ror codes, “ - - ” is displayed.)

1. Display method

2. Display cancellation

For a unit display board •

While an error code is being displayed, press and hold the PUMP SW. and RESET SW. at the same time for 5 sec­onds to cancel the error code display and turn o the display.
Alternatively, if no operations are performed for 5 minutes, the error code display is automatically cancelled and
the display turned o.
While an error code is being displayed, press and hold the reset switch for 10 seconds or more to delete all past
error codes. The display turns to “ - - ”.

– 10 –

TROUBLESHOOTING GUIDE

CHECK FOLLOWING STEPS

[g. 3] Voltage of PUMP on the PCB(CONTROLLER)

7

PUMP

FUSE CF3
(250V T5A)

B W

+

-

0 Ω

PCB
(CONTROLLER)

[g. 2] Voltage of fan motor on the PCB(CONTROLLER)

[g. 1] Continuity of current fuse on the PCB (CONTROL-

LER)

9

FAN MOTOR

FUSE CF4
(250V T3.15A)

BL Y W B R

+ + + +

-

0 Ω

PCB
(CONTROLLER)

[g. 4] Resistance of 4-way valve coil

Take o the connector and check the resistance 4-way
valve coil.

Measure voltage between the connector pins of con­nector 9. Connector 9 shall be checked during heat­ing or cooling operation.
Measure voltage as follows without taking o the con­nector 9.

Measure voltage between the connector pins of con­nector 7. Connector 7 shall be checked during heat­ing or cooling operation.
Measure voltage as follows without taking o the con­nector 7.

PCB
(CONTROLLER)
is Normal

PCB
(CONTROLLER)
is Normal

between red + and black approx. DC200~370V
between yellow + and black approx. DC3~7V
between white + and black approx. DC15V

between black + and white approx.
AC207~253V

Fan motor
Error

Pump Error

0Ω

FUSE CF3
(250V T5A)

PCB
(CONTROLLER)

FUSE CF1
(250V T25A)

0Ω

4-way valve coil

1360Ω

– 11 –

TROUBLESHOOTING GUIDE

CHECK FOLLOWING STEPS

[g. 7] Resistance of POWER MODULE

[g. 6] Resistance of the circulation pump

[g. 5] Resistance of the heater for tank

2

PCB
(CONTROLLER)

W
W

2.6kΩ

7

PCB
(CONTROLLER)

140Ω

BL

GR

OR

P

: BLUE
: GRAY
: ORANGE
: PINK

OR

P

BL
GR

below 100kΩ

– 12 –

TROUBLESHOOTING GUIDE

WIRING DIAGRAM

R :RED

G:GREEN

P :PINK

GR :GRAY

OR :ORANGE

Y:YELLOW

B:BLACK

W:WHITE

BL :BLUE

COLOROFWIRE

4WAYV.

HEATER

EXP.V.

PCB(DISPLAY)

MODESW.

RESETSW.

PUMPSW.

312

※

※

※

TERMINAL

BLOCK

W

B

G/Y

L

N

※

※

※

※W※B※B※

G/Y

R

1

R

W

BBLB

OR

GR

P

B

COMPRESSOR

POWER

SENSOR(TEMP.,SUCTION)

SENSOR(TEMP.,DEFROST)

SENSOR(TEMP.,DISCHARGE)

SENSOR(TEMP.,OUTDOOR)

MOTOR

(FAN)

PUMP

PCB(CONTROLLER)

SENSOR(TEMP.,RETURN)

SENSOR(TEMP.,OUTGOING)

REACTOR

※※

3

7

4

2

24

23

19

18

21

20

9

12

14

13

BL

OR

GR

P

(U)

S

(V)

R

(W)

C

PCB

(POWERMODULE)

CONNECTING

CABLE

CONNECTING

CABLE

B

B

B

B

B

B

BB

CN1

CN1

CN2

FUSE

250V

T3.15A

FUSE

250V

T5A

G/Y

BL

BL

W

B

W

W

WPYA100LA
WPYA080LA

– 13 –

TROUBLESHOOTING GUIDE

MONITOR DISPLAY METHOD

Switch “ ON ” the MODE SW. 4 on the unit PCB (DISPLAY). 1.
The monitor number and monitor data are alternately displayed.
Push the PUMP SW. of the unit PCB (DISPLAY). 2.
Every time the PUMP SW. is pressed the display changes in the sequence below.
Switch “ OFF ” the MODE SW. 4 after completing the check.3.

ON

4

3

2

1

OFF

MODE SW.

Monitor display

PCB (DISPLAY)

PUMP SW.

Monitor display contents •

Monitor Monitor data display contents

d0 Circulating water return temperature Units of 1°C
d1 Compressor operating frequency Units of 1Hz
d2 Discharge temperature Units of 1°C
d3 Power consumption value

Units of 100W
d4 Interface voltage Units of 0.1V
d5
d6 Ambient air temperature Units of 1°C
d7 External thermistor temperature Units of 1°C
d8 Suction temperature Units of 1°C
d9

Circulating water outgoing temperature

Units of 1°C

FREEZE PREVENTION SETTING

If the outside temperature falls below about 2°C, freeze pre- •
vention operation is possible depending on the unit MODE
SW. 1

1.No freeze prevention operation (When using anti­ freeeze)

2. Freeze prevention operation (When the outdoor
temperature falls below about 2°C , the circulating
water is warmed and circulated.)

CHARGE THE CIRCULATION WATER AND AIR PURGE IN WATER CIRCUIT

When you push PUMP SW on display PCB, the water pump is started to •
operate to circulate the water.
The each digital segment of right side on display PCB lights in sequence
during operating the pump.
The pump is automatically stopped after operating for 10 minutes. •
If it is not enough to let the air out of water circuit, please push PUMP SW
once again after the pump stopped.
When you would like to stop operating the pump before the pump is
automatically stopped, please push PUMP SW once again.

PUMP SW.

ON

4

3

2

1

OFF

ON

4

3

2

1

OFF

For1 For2

MODE SW. position

PCB(DISPLAY)

The factory setting is “ ON : 2. Freeze prevention operation ”.

OFF

:

ON

:

– 14 –

ELECTRIC CIRCUIT DIAGRAM

WPYA100LA
WPYA080LA

– 15 –

EXPLODED VIEW

Detail view

H

I

D

A

M

K

A

M

K

D

E

J

C

C

F

G

L

E

F

B

B

H

I

G

L

J

3

1

6

7

4

11

45

53

55

32

30

33

46

31

47

52

56

43

52

54

51

24

54

57

49

49

49

52

14

49

24

50

38

8

40

48

13

22

23

12

5

10

20

39

21

18

34

37

35

28

25

27

29

41

42

28

17

9

19

44

26

16

15

36

2

28

291827

20

11

4

10

7

6

WPYA100LA
WPYA080LA

– 16 –

PARTS LIST

No. PARTS NAME PARTS No.

1 OUTLET GRILLE 30112520
2 FRONT PANEL ASSY.(LEFT) 20600350
3 FRONT PANEL ASSY.(RIGHT) 20600380
4 TOP PANEL ASSY. 20600401
5 PROPELLER FAN 52630190
6 MOTOR 30112580
7 BRACKET,MOTOR 20605280
8 SENSOR (TEMP.OUTDOOR) 30114360

9 BACK PANEL ASSY. 20600421
10 BOTTOM PANEL ASSY. 20600441
11 CONDENSOR ASSY. 20605621
12 COIL,EXPANSION VALVE 51914531
13 EXPANSION VALVE 30112630
14 SENSOR (TEMP.DEFROST) 30114350
15 TANK COVER (TOP) 20605930
16 TANK COVER (SIDE) 20605920
17 HEAT EXCHANNGER ASSY. 20606791
18 PUMP ASSY. 20605960
19 TANK 30112640
20 COMPRESSOR 30113070
21 VIBRATION PROOF RUBBER 30001110
22 SENSOR (TEMP.DISCHARGE) 51100870
23 SENSOR (TEMP.SUCTION) 30089900
24 SENSOR (TEMP.CIRCULATING WATER) 30112980
25 REACTOR 30112530
26 TERMINAL BLOCK 30112970
27 PCB (DISPLAY) 30051560

28

PCB (CONTROLLER) with CASE (WPYA100LA) 30112540+20605320

PCB (CONTROLLER) with CASE (WPYA080LA) 30116780+20605320
29 PCB (POWER MODULE) ASSY. WITH HEAT SINK 20605341
30 RUBBER HOSE (FOR RELEIF VALVE) 30114420
31 RUBBER HOSE (FOR AIR PURGE VALVE) 30114430
32 HOSE BAND (FOR RELIEF VALVE) 30084480
33 HOSE BAND (FOR AIR PURGE VALVE) 68616090
34 SOUND PROOF MATERIAL1 20611960
35 SOUND PROOF MATERIAL2 20611970
36 SOUND PROOF MATERIAL3 20611980
37 SOUND PROOF MATERIAL4 20611990
38 SOUND PROOF MATERIAL5 20612000
39 SOUND PROOF MATERIAL6 20612010
40 OUTDOOR THERMISTOR HOLDER 20040100
41 FUSE(5A) 40016410
42 FUSE(3.15A) 40016400
43 COIL, 4-WAY VALVE 30112610
44 TANK HEATER 30114370
45 RELIEF VALVE 30112670
46 AIR PURGE VALVE 30112680
47 PRESSURE GAUGE 30112690
48 4-WAY VALVE 30104090
49 PACKING B 30113030
50 PACKING C 30113060

WPYA100LA
WPYA080LA

– 17 –

PARTS LIST

No. PARTS NAME PARTS No.

51 O RING (P4) 01107120
52 O RING (P6) 01107600
53 O RING (P14) 01107150
54 QUICK FASTENER 52775700
55 QUICK FASTENER 00633600
56 QUICK FASTENER 00601690
57 DRAIN PLUG 30078010

DISASSEMBLY PROCESS

WARNING

Before servicing the unit, the power supply switch OFF,

Then, do not touch electric parts for 10 minutes due to the risk of electric shock.

１.Appearance

２.SERVICE PANEL removal

Remove the screws. Remove the SERVICE PANEL.

(3 places) by sliding downward.

Screw

Hook (4 places)

-18-

３.MAIN PCB removal

Remove the screw for fixing Remove the screw for fixing the cover.

the panel. (1 place) (1 place)
Open the panel for hanging PCB. Remove the fire prevention cover.

Remove connectors.

Remove the screws for PCB box (2 places)
to detach PCB box whole.

４. PCB (DISPLAY) removal

Remove the locking spacers. (3 places)
Remove the PCB (DISPLAY).

Panel for hanging PCB Open

Fire prevention cover

Screw

Screw for fixing the cover

Hook (2 places)

Hook (2 places)

Locking spacer

Screw

-19-

５.TOP PANEL removal

Remove the screws. (4 places)

Remove the TOP PANEL.

６.REACTOR removal

Remove the connectors.

Remove the screws. (4 places)

Remove the REACTOR.

７.MODULE PCB removal

Remove the screws. (2 places) Remove the screws. (4 places)

Remove the cover. Remove MODULE PCB with the heat sink.

Screw

ScrewConnector

Fire protection
cover

Screw

Screw

-20-

８.SOLENOID COIL (4way valve) removal

Remove the screw. (1 place)

Remove the SOLENOID COIL (4way valve).

９.EEV COIL removal

Remove the EEV COIL by hand.

１０ .FRONT PANEL(LEFT) removal

Remove the screws. (8 places)

Remove the FRONT PANEL(LEFT).

Screw

Screw

-21-

１１ .FAN MOTOR removal

Remove the fixing nut. Remove the cable for the FAN MOTOR.

Remove the PRPELLER FAN. from the hooks in the fan bracket. (3 places)

Note at the installation.
Tightening torque is from 4.0 to 6.0 N・m.

Note at the installation.

Remove the screws. (4 places)
Remove the FAN MOTER.

Nut

Cable for the FAN MOTOR

Cable for the SENSOR (TEMP.OUTDOOR)

Screw

Hook

-22-

１２ .FAN BRACKET and SEPARATE WALL removal

Remove the screws. (2 places)

Remove the FAN BRACKET.

Remove the screws. (3 places) Remov e the screws. (3 places)

Remove the SEPARATE WALL.

Screw

Earth

screw

Screw

-23-

１３ .COMPRESSOR removal

Precautions for exchange of Compressor.

Do not allow moisture or debris to get inside refrigerant pipes during work.

Procedure for Compressor removal.

Collect the refrigerant from the CHECK JOINT.

Start the following work after completely collecting the refrigerant.

Do not reuse the refrigerant that has been collected.

Remove the SENSOR (TEMP.DISCHARGE) Remove the COMPRESSOR COVER④,
and the SENSOR. (TEMP.SUCTION) COVER⑤, and COVER ⑥
(※see chapter 25 and 26)
Remove the COMPRESSOR COVER ①,
COVER② , and COVER③.

Remove the nut. Remove the connectors.

Remove the TERMINAL COVER. [ S(U) : BLACK, R(V) : WHITE, C(W) : RED ]

Check

joint

Cover ①

Cover ②

Cover ③

Cover ⑤

Cover ④

Cover ⑥

Nut

-24-

Cut the Discharge pipe Cut the Suction pipe Removethe COMP NUTS. (3 places)

in this range. in this range. Remove the COMPLESSOR by lifting.

Caution

・Keep the shape better.

・There is a possibility of catching fire to oil when removing by the welding without cutting.

Procedure for compressor installation.

Reverse procedure to removing the compressor.

Precautions for installation of compressor.

(1) When brazing, do not apply the flame to the terminal.

(2) When brazing, be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale.

Range

Range

Nut

-25-

１４ .CIRCULATION PUMP removal

Precautions for exc hange of Pump.

Drain in the water - cycle before work.

Procedure for drain in the water - cycle.

Install a drain pan or drain hose to the DRAIN PLUG.

Open the DRAIN PLUG and drain.

Remove the screw for the cover. (1 place)

Remove the cover.

Remove the nuts for pipes. (2 places)

Remove the screw for the pump. (1 place)

Remove the CIRCULATION PUMP.

Note at the installation.

When take off Nut, remove a packing together.

Tightening torque is from 15.0 to 30.0 N・m.

Screw for the pump

Nut

Cover

Screw for the cover

Drain plug

Loose
for open

-26-

１５ .TANK COVER removal

Remove the screw. (1 place) Remove the screws. (6 places)

Remove the TANK COVER (TOP). Remove the TANK COVER (SIDE).

１６ .TANK HEATER removal

Remove the TANK HEATER by hand and exchange.

Screw

Screw

Screw

Tank heater

-27-

１７ .TANK removal

Remove the nut for the tank. Remove the screw. (2 places)

Note at the installation Remove the panel for fixing the tank.

When take off Nut, remove a packing together. Remove the TANK.

Tightening torque is from 15.0 to 30.0 N・m.

１８ .BACK PANEL removal

Remove the screw. (1 place)

Remove the insulation sheet

Remove the insulation sheet

Remove the terminal cover. for the terminal. for the tank.

Remove the screws. (16 places) Remove the BACK PANEL.

Nut

Screw

Insulation sheet

Screw

Insulation sheet

Screw

Screw
×4

Screw

Screw

Screw
×4

-28-

１９ .HEAT EXCHANGER removal

Remove the screws. (2 places) Remove the panel for fixing the terminal block

with the terminal block.

Remove the EEV COIL. (see chapter 9)

Remove the pipes in the refrigerant -cycle by brazing. (2 places, see chapter 30)

Remove the nuts.

Remove the HEAT EXCHANGER by lifting.

Note at the installation.

When take off Nut, remove packing together.

Tightening torque is from 15.0 to 30.0 N・m.

Screw

Panel for fixing the terminal block

Brazing
point

Nut

-29-

２０ .MANOMETER removal

Remove the quick fastener by pulling.

Remove the MANOMETER.

２１ .PRESSURE RELIEF VALVE removal

Remove the clip for the hose. Remove the quick fastener by pulling.

Remove the hose. Remove the PRESSURE RELIEF VALVE.

Quick fastener

Quick fastener

Hose band Hose

-30-

２２ .AIR PURGE VALVE removal

Remove the clip for the hose Remove the AIR PURGE VALVE

Remove the hose. by using 2 spanners.

２３ .SENSOR (TEMP.OUTDOOR) removal

Remove the SENSOR (TEMP.OUTDOOR) by hand.

２４ .SENSOR (TEMP.DISCHARGE) removal

Remove the SENSOR (TEMP.DISCHARGE) with the holder.

Hose band

Hose

2 spanners

Sensor

Sensor

Sensor and Holder

Holder

-31-

２５ .SENSOR (TEMP.SUCTION) removal

Remove the THERMISTOR SPRING.

Remove the SENSOR (TEMP.SUCTION).

２６ .SENSOR (TEMP.DEFROST) removal

Remove the COMPRESSOR COVER ① , COVER ②, COVER ③, and COVER ④. (See chapter 14)

Remove the SENSOR (TEMP.DEFROST) with the holder.

２７ .SENSOR (TEMP.CIRCULAITING WATER OUTGOING) removal

Remove the THERMISTOR SPRING.

Remove the SENSOR (TEMP. CIRCULAITING WATER OUTGOING).

Sensor

Sensor

Sensor Sensor and Holder

Holder

-32-

２８ .SENSOR (TEMP.CIRCULAITING WATER RETURN) removal

Remove the THERMISTOR SPRING.

Remove the SENSOR (TEMP. CIRCULAITING WATER RETURN).

２９ .Precautions for exchange of refrigerant - cycle parts and pipes.

(1) During exchange the following parts shall be protected by wet rag and not makes the allowable temperature or more.

(2) Remove the heat insulation when there is the heat insulation near the welding place.

Move and cool it when its detaching is difficult.

(3) Cool the parts when there are parts where heat might be transmitted besides the replacement part.

(4) Interrupt the flame with fireretardant board when the flame seems to hit the following pats directly.

(5) Do not allow moisture or debris to get inside refrigerant pipes during work.

(6) When brazing, be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale.

Part name

Allowable

temperature

Precautions in work

EXPANSION VALVE 120℃

Remove the coil before brazing.

And install the coil after brazing.

Detaching necessity Sensor.

4WAY VALVE 120℃

Remove the coil before brazing.

And install the coil after brazing.

Sensor

-33-

ISSUED

DEC.2009

RA-70-[3]

Printed in Japan

REVISED

MAR.2010

REVISED

APR.2010