Mitsubishi PEFY-P72NMHSU-E, PEFY-P96NMHSU-E Service Manual

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Page 1

TECHNICAL & SERVICE MANUAL

Model nameModel name

PEFY-P72NMHSU-E PEFY-P96NMHSU-E

2011

AIR CONDITIONERS

Page 2

Page 3

HWE10170 GB

Safety Precautions

Read before installation and performing electrical work

Symbol explanations

Thoroughly read the following safety precautions prior to installation. Observe these safety precautions for your safety. This equipment may have adverse effects on the equipment on the same power supply system. Contact the local power authority before connecting to the system.

WARNING

This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or death.

CAUTION

This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or dam-

age to the unit.

Indicates an action that must be avoided.

Indicates important instructions.

Indicates a parts that requires grounding.

Indicates that caution must be taken with rotating parts. (This symbol is on the main unit label.) <Color: Yellow>

Indicates that the parts that are marked with this symbol pose a risk of electric shock. (This symbol is on the main unit label.) <Color: Yellow>

WARNING

Carefully read the labels affixed to the main unit.

WARNING

Ask your dealer or a qualified technician to install the unit.

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

Properly install the unit on a surface that can withstand its weight.

Unit installed on an unstable surface may fall and cause injury.

Only use specified cables. Securely connect each cable so that the terminals do not carry the weight of the cable.

Improperly connected cables may produce heat and start a fire.

Take appropriate safety measures against wind gusts and earthquakes to prevent the unit from toppling over.

Improper installation may cause the unit to topple over and cause injury or damage to the unit.

Only use accessories (i.e., air cleaners, humidifiers, electric heaters) recommended by Mitsubishi Electric.

Do not make any modifications or alterations to the unit. Consult your dealer for repair.

Improper repair may result in water leakage, electric shock, or fire.

Do not touch the heat exchanger fins with bare hands.

The fins are sharp and pose a risk of cuts.

In the event of a refrigerant leak, thoroughly ventilate the room.

If gaseous refrigerant leaks out and comes in contact with an open flame, toxic gases will be generated.

Properly install the unit according to the instructions in the Installation Manual.

Improper installation may result in water leakage, electric shock, or fire.

Have all electrical work performed by an authorized electrician according to the local regulations and the instructions in this manual. Use a dedicated circuit.

Insufficient power supply capacity or improper installation of the unit may result in malfunctions of the unit, electric shock, or fire.

Page 4

HWE10170 GB

Precautions for handling units for use with R410A

WARNING

Keep electrical parts away from water.

Wet electrical parts pose a risk of electric shock, smoke, or fire.

Securely attach the control box cover.

If the cover is not installed properly, dust or water may infiltrate and pose a risk of electric shock, smoke, or fire.

Only use the type of refrigerant that is indicated on the unit when installing or relocating the unit.

Infiltration of any other types of refrigerant or air into the unit may adversely affect the refrigerant cycle and may cause the pipes to burst or explode.

When installing the unit in a small space, take appropriate precautions to prevent leaked refrigerant from reaching the limiting concentration.

Leaked refrigerant gas will displace oxygen and may cause oxygen starvation. Consult your dealer before installing the unit.

Consult your dealer or a qualified technician when moving or reinstalling the unit.

Improper installation may result in water leakage, electric shock, or fire.

After completing the service work, check for a refrigerant leak.

If leaked refrigerant is exposed to a heat source, such as a fan heater, stove, or electric grill, toxic gases will be generated.

Do not try to defeat the safety features of the unit.

Forced operation of the pressure switch or the temperature switch by defeating the safety features for these devices, or the use of accessories other than the ones that are recommended by Mitsubishi Electric may result in smoke, fire, or explosion.

Consult your dealer for proper disposal method.

Do not use a leak detection additive.

CAUTION

Do not use the existing refrigerant piping.

A large amount of chlorine that may be contained in the residual refrigerant and refrigerator oil in the existing piping may cause the refrigerator oil in the new unit to deteriorate.

Use refrigerant piping materials made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and free of such contaminants as sulfur, oxides, dust, dirt, shaving particles, oil, and moisture.

Contaminants in the refrigerant piping may cause the refrigerator oil to deteriorate.

Store the piping materials indoors, and keep both ends of the pipes sealed until immediately before brazing. (Keep elbows and other joints wrapped in plastic.)

Infiltration of dust, dirt, or water into the refrigerant system may cause the refrigerator oil to deteriorate or cause the compressor to malfunction.

Use a small amount of ester oil, ether oil, or alkyl benzene to coat flares and flanges.

Infiltration of a large amount of mineral oil may cause the refrigerator oil to deteriorate.

Charge the system with refrigerant in the liquid phase.

If gaseous refrigerant is drawn out of the cylinder first, the composition of the remaining refrigerant in the cylinder will change and become unsuitable for use.

Only use R410A.

The use of other types of refrigerant that contain chloride may cause the refrigerator oil to deteriorate.

Use a vacuum pump with a check valve.

If a vacuum pump that is not equipped with a check valve is used, the vacuum pump oil may flow into the refrigerant cycle and cause the refrigerator oil to deteriorate.

Prepare tools for exclusive use with R 410A. Do not use the following tools if they have been used with the conventional refrigerant: gauge manifold, charging hose, gas leak detector, check valve, refrigerant charge base, vacuum gauge, and refrigerant recovery equipment.

If the refrigerant or the refrigerator oil that may be left on these tools are mixed in with R410A, it may cause the refrigerator oil in the new system to deteriorate. Infiltration of water may cause the refrigerator oil to deteriorate. Leak detectors for conventional refrigerants will not detect an R410A leak because R410A is free of chlorine.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of the refrigerant in the cylinder will change and become unsuitable for use.

Exercise special care when handling tools for use with R410A.

Infiltration of dust, dirt, or water into the refrigerant system may cause the refrigerator oil to deteriorate.

Page 5

CONTENTS

HWE10170 GB

[1] Components and Functions...................................................................................................... 1

[2] Specifications............................................................................................................................ 3

[3] Sound pressure levels .............................................................................................................. 5

[4] Fan performance and corrected air flow ................................................................................... 8

[5] Outlines and Dimensions........................................................................................................ 10

[6] Wiring Diagram ....................................................................................................................... 11

[7] Refrigerant system diagram.................................................................................................... 12

[8] Troubleshooting ...................................................................................................................... 13

[9] Disassembly Procedure.......................................................................................................... 60

[10] Optional parts ....................................................................................................................... 67

Page 6

HWE10170 GB

Page 7

1- 1 -

HWE10170 GB

XI Indoor Unit

[1] Components and Functions

1. Indoor Unit

2. Remote Controller

[PAR-21MAA] Once the operation mode is selected, the unit will remain in the selected mode until changed.

(1) Remote Controller Buttons

Keep the remote controller out of direct sunlight to ensure accurate measurement of room temperature. The thermistor at the lower right-hand section of the remote controller must be free from obstructions to ensure accurate mea-

surement of room temperature.

(1) In case of rear inlet

1 [Set Temperature] Button 7 [Vane Control] Button 2 [Timer Menu] Button 8 [Ventilation] Button

[Monitor/Set] Button [Operation] Button

3 [Mode] Button 9 [Check/Clear] Button

[Back] Button 10 [Test Run] Button

4 [Timer On/Off] Button 11 [Filter] Button

[Set Day] Button [ ] Button

5 [Louver] Button 12 [ON/OFF] Button

[Operation] Button 13 Position of built-in room thermistor

6 [Fan Speed] Button 14 [Set Time] Button

Air inlet

Air outlet

Page 8

2- 2 -

HWE10170 GB

(2) Remote Controller Display

A Current time/Timer time I Louver swing

B Centralized control indicator J Ventilation

C Timer OFF indicator K Filter sign

D Timer mode indicator L Sensor position

E Operation mode display: COOL, DRY, AUTO,

FAN, HEAT

M Room temperature

F Function mode indicator N Vane setting

G Preset temperature O Fan speed

H Power indicator P Operation lamp

Page 9

3- 3 -

HWE10170 GB

[2] Specifications

1. Specifications

*1 <Cooling> Indoor temperature: 80°FD.B./67°FW.B. (26.7°CD.B./19.4°CW.B.) Outdoor temperature: 95°FD.B.(35°CD.B.)

<Heating> Indoor temperature: 70°FD.B.(21.1°CD.B.) Outdoor temperature: 47°FD.B./43°FW.B. (8.3°CD.B./6.1°CW.B.)

*2 Measured at a power supply voltage of 230 V

Model PEFY-P72NMHSU-E PEFY-P96NMHSU-E

Power supply

Voltage V 1-phase 208-230

Frequency Hz 50/60

Capacity*1 Cooling kW[BTU/h] 21.1 (72,000) 28.1 (96,000)

Heating kW[BTU/h] 23.4 (80,000) 31.7 (108,000)

Power consumption

50Pa

[0.20in.WG]

Cooling kW

0.43 0.59

Heating kW

100Pa

[0.40in.WG]

Cooling kW

0.52 0.70

Heating kW

150Pa

[0.60in.WG]

Cooling kW

0.63 0.82

Heating kW

200Pa

[0.80in.WG]

Cooling kW

0.75 0.95

Heating kW

250Pa

[1.00in.WG]

Cooling kW

0.89 0.97

Heating kW

Current consumption *2

50Pa

[0.20in.WG]

Cooling A

2.31 3.08

Heating A

100Pa

[0.40in.WG]

Cooling A

2.79 3.75

Heating A

150Pa

[0.60in.WG]

Cooling A

3.32 4.43

Heating A

200Pa

[0.80in.WG]

Cooling A

3.95 5.10

Heating A

250Pa

[1.00in.WG]

Cooling A

4.81 5.29

Heating A

External finish Galvanized

Dimensions Height mm[in.] 470 (18-9/16)

Width mm[in.] 1250 (49-1/4)

Depth mm[in.] 1120 (44-1/8)

Net weight 97 100

Heat exchanger Cross fin (Alminium fin and copper tube)

Fan Type Sirocco fan x 2

Airflow rate (H-M-L)

/min

[cfm]

72-61-50

2542-2154-1766

84-71-58

2966-2507-2048

External static pressure

[in.WG]

(50)/(100)/150/(200)/(250)

(0.20)/(0.40)/0.60/(0.80)/(1.00)

Motor Output kW 0.87

Air filter Option

Refriferant pipe dimensions Gas

(Brazed connection)

mm ø19.05 ø22.2

[in.] ø3/4 ø7/8

Liquid (Brazed connection)

mm ø9.52

[in.] ø3/8

Drain pipe dimensions mm O.D.32

[in.] 1-1/4

Operating noise (H-M-L) 50Pa [0.20in.WG] dB(A) 39-35-32 42-38-35

100Pa [0.40in.WG] 41-37-34 44-40-37

150Pa [0.60in.WG] 43-39-36 46-42-39

200Pa [0.80in.WG] 45-41-38 48-44-41

250Pa [1.00in.WG] 47-43-40 50-46-43

Measured in anechoic room.

Aux. duct

1.5m

Measurement location 2

Page 10

4- 4 -

HWE10170 GB

2. Electrical component specifications

Component Symbol

Room temperature thermistor

TH21 Resistance 32°F (0°C)/15k, 50°F (10°C)/9.6k, 68°F (20°C)/6.3k,

77°F (25°C)/5.4k, 86°F (30°C)/4.3k, 104°F (40°C)/3.0k

Liquid pipe thermistor TH22 Resistance 32°F (0°C)/15k, 50°F (10°C)/9.6k, 68°F (20°C)/6.3k,

77°F (25°C)/5.4k, 86°F (30°C)/4.3k, 104°F (40°C)/3.0k

Gas pipe thermistor TH23 Resistance 32°F (0°C)/15k, 50°F (10°C)/9.6k, 68°F (20°C)/6.3k,

77°F (25°C)/5.4k, 86°F (30°C)/4.3k, 104°F (40°C)/3.0k

Fuse (INV board) F01 250V 15A

Fuse (NF board) F001 250V 10A

Fuse (NF board) F100 250V 3.15A

Fan motor MF 8-pole, Output 870W ERC8801AB

Linear expansion valve

LEV1 LEV2

12VDC Stepping motor drive port diameter ø3.2 (0~2000 pulse)

Power supply terminal block

TB2

(L, N, ) 450V 30A

Page 11

5- 5 -

HWE10170 GB

[3] Sound pressure levels

1. Sound pressure level

Ceiling concealed

2. NC curves

PEFY-P72NMHSU-E

Measurement point

Inlet

Outlet

1.5m

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:50Pa, 0.20[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:100Pa, 0.40[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:150Pa, 0.60[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:200Pa, 0.80[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Page 12

6- 6 -

HWE10170 GB

PEFY-P96NMHSU-E

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:250Pa, 1.00[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:50Pa, 0.20[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:100Pa, 0.40[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:150Pa, 0.60[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:200Pa, 0.80[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Page 13

7- 7 -

HWE10170 GB

Approximate minimum audible limit on continuous noise

High Middle Low

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

63 125 250 500 1k 2k 4k 8k

NC-60

NC-50

Octave band pressure level (dB) 0dB=20μPa

NC-40

NC-30

NC-20

Octave band center frequencies (Hz)

External Static Pressure:250Pa, 1.00[in.WG] Power Source: 208, 230V, 50Hz/60Hz

Page 14

8- 8 -

HWE10170 GB

[4] Fan performance and corrected air flow

PEFY-P72NMHSU-E

Static pressure (Pa)

[in.WG]

Airflow rate (m3/min)

[cfm]

External static pressure :50Pa, 0.20[in.WG] Power source:208, 230V, 50Hz/60Hz

Middle

High

Low

Limit

[2825]

[2648]

[2472]

[2295]

[2119]

[1942]

[1412]

[1766]

[1589]

[0.04]

[0.08]

[0.12]

[0.16]

[0.20]

[0.24]

[0.28]

[0.32]

[0]

Static pressure (Pa)

[in.WG]

Airflow rate (m3/min)

[cfm]

[2825]

[2648]

[2472]

[2295]

[2119]

[1942]

[1412]

[1766]

[1589]

[0.12]

[0.16]

[0.20]

[0.24]

[0.28]

[0.32]

[0.36]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

External static pressure :100Pa, 0.40[in.WG] Power source:208, 230V, 50Hz/60Hz

Middle

High

Low

Limit

External static pressure :150Pa, 0.60[in.WG] Power source:208, 230V, 50Hz/60Hz

Middle

High

Low

Limit

Static pressure (Pa)

[in.WG]

Airflow rate (m3/min)

[cfm]

[2825]

[2648]

[2472]

[2295]

[2119]

[1942]

[1412]

[1766]

[1589]

[0.24]

[0.28]

[0.32]

[0.36]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

140

[0.56]

150

[0.60]

160

[0.64]

170

[0.68]

180

[0.72]

External static pressure :200Pa, 0.80[in.WG] Power source:208, 230V, 50Hz/60Hz

Middle

High

Low

Limit

Static pressure (Pa)

[in.WG]

Airflow rate (m3/min)

[cfm]

[2825]

[2648]

[2472]

[2295]

[2119]

[1942]

[1412]

[1766]

[1589]

[0.32]

[0.36]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

140

[0.56]

150

[0.60]

160

[0.64]

170

[0.68]

180

[0.72]

190

[0.76]

200

[0.80]

210

[0.84]

220

[0.88]

230

[0.92]

External static pressure :250Pa, 1.00[in.WG] Power source:208, 230V, 50Hz/60Hz

Middle

High

Low

Limit

Static pressure (Pa)

[in.WG]

Airflow rate (m3/min)

[cfm]

[2825]

[2648]

[2472]

[2295]

[2119]

[1942]

[1412]

[1766]

[1589]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

140

[0.56]

150

[0.60]

160

[0.64]

170

[0.68]

180

[0.72]

190

[0.76]

200

[0.80]

210

[0.84]

220

[0.88]

230

[0.92]

240

[0.96]

250

[1.00]

260

[1.04]

270

[1.09]

Page 15

9- 9 -

HWE10170 GB

PEFY-P96NMHSU-E

Middle

High

Low

Limit

Static pressure (Pa)

[in.WG]

Airflow rate (m3/min)

[cfm]

External static pressure :50Pa, 0.20[in.WG] Power source:208, 230V, 50Hz/60Hz

[3178]

[3001]

[2825]

[2648]

[2472]

[2295]

[1766]

[2119]

[1942]

[0.04]

[0.08]

[0.12]

[0.16]

[0.20]

[0.24]

[0.28]

[0.32]

[0.36]

100

[0.40]

[0]

Middle

High

Low

Limit

Static pressure (Pa)

[in.WG]

Airflow rate (m3/min)

[cfm]

[0.12]

[0.16]

[0.20]

[0.24]

[0.28]

[0.32]

[0.36]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

140

[0.56]

External static pressure :100Pa, 0.40[in.WG] Power source:208, 230V, 50Hz/60Hz

[3178]

[3001]

[2825]

[2648]

[2472]

[2295]

[1766]

[2119]

[1942]

External static pressure :150Pa, 0.60[in.WG] Power source:208, 230V, 50Hz/60Hz

Static pressure (Pa)

[in.WG]

[0.24]

[0.28]

[0.32]

[0.36]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

140

[0.56]

150

[0.60]

160

[0.64]

170

[0.68]

180

[0.72]

190

[0.76]

Middle

High

Low

Limit

Airflow rate (m3/min)

[cfm]

[3178]

[3001]

[2825]

[2648]

[2472]

[2295]

[1766]

[2119]

[1942]

Middle

High

Low

Limit

Airflow rate (m3/min)

[cfm]

External static pressure :200Pa, 0.80[in.WG] Power source:208, 230V, 50Hz/60Hz

Static pressure (Pa)

[in.WG]

[0.32]

[0.36]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

140

[0.56]

150

[0.60]

160

[0.64]

170

[0.68]

180

[0.72]

190

[0.76]

200

[0.80]

210

[0.84]

220

[0.88]

230

[0.92]

240

[0.96]

[3178]

[3001]

[2825]

[2648]

[2472]

[2295]

[1766]

[2119]

[1942]

Middle

High

Low

Limit

Airflow rate (m3/min)

[cfm]

External static pressure :250Pa, 1.00[in.WG] Power source:208, 230V, 50Hz/60Hz

Static pressure (Pa)

[in.WG]

100

[0.40]

110

[0.44]

120

[0.48]

130

[0.52]

140

[0.56]

150

[0.60]

160

[0.64]

170

[0.68]

180

[0.72]

190

[0.76]

200

[0.80]

210

[0.84]

220

[0.88]

230

[0.92]

240

[0.96]

250

[1.00]

260

[1.04]

270

[1.09]

280

[1.13]

290

[1.17]

[3178]

[3001]

[2825]

[2648]

[2472]

[2295]

[1766]

[2119]

[1942]

Page 16

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HWE10170 GB

[5] Outlines and Dimensions

Air inlet Air outlet

(DUCT)

(7/16)

(2-3/8)

(3-3/16)

(2-3/8)

(3-15/16x3=11-13/16)

(1-3/4)

(9-13/16)

(DUCT)

(7/16)

(5/8)

(3-15/16)

(15/16)

(3-15/16)

(Actual length)

Drain Piping.

(21-11/16)

(7-7/8~11-13/16)

(17-3/4)

(5-15/16~7-7/8)

(17-3/4)

2X4-ø3(1/8) holes

2X11-ø3(1/8) holes

Drain hole

Control box

(Power source)

Terminal block

(MA remocon)

(Transmission wiring)

(Power souse wiring)

(Normal type)

(Option)

(Transmission)

Suspension bolt hole

Terminal blockKnockout hole ø22.2(7/8)

Knockout hole ø22.2(7/8)

Terminal block

4-14X30(9/16x3/16) Slot

2X4-ø3(1/8) holes

2X11-ø3(1/8) holes

Make the access door

at the appointed position properly

for service maintenance.

Access door Ceiling surface

Access door

Note2

Note3

Required space for service and maintenance.

MODEL

PEFY-P72NMHSU-E

PEFY-P96NMHSU-E

19.05(3/4)

22.2(7/8)

9.52(3/8)

Drain hose 32mm

(1-1/4inch)

Note 1.Use M10 screw for the suspension bolt (field supply).

2.Keep the service space for the maintenance from the bottom

when the heat exchanger is cleaned.

3.Keep the service space for the maintenance from the bottom

when the fan motor is changed.

4.Make sure to install the air filter (field supply) on the air intake side.

In case field supplied air filter is used, attach it

where the filter service is easily done.

Unit:mm(in.)

249

95(3-4/3)

342(13-1/2)

170(6-3/4±1/4)

100

470(18-9/16)

20(13/16)

102(4-1/16)

105(4-3/16)

420(16-9/16)

1100(43-5/16)(DUCT)

1250(49-1/4)

1372(54-1/16)

1124(44-5/16)

100x10=1000(3-15/16x10=39-3/8)

100(3-15/16)

50(2)

1326(52-1/4)(Suspension bolt pitch)

1034(40-3/4)(Suspension bolt pitch)

340(13-7/16)

1100(43-5/16)(DUCT)

100

29(1-3/16)

41(1-5/8)

1067(42-1/16)

24(1)

1120(44-1/8)

489(19-5/16)

327(12-7/8)

164(6-1/2)

30(1-3/16)

15(5/8)

100X3(=300)

100(3-15/16)

20(13/16)

100(3-15/16)

100x3=300

100x10=1000(3-15/16x10=39-3/8)

50(2)

100(3-15/16)

More than 20(13/16)

550

50(2)

150~200

50(2)

450

800(31-1/2)

450

200~300

1350(53-3/16)

730(28-3/4)

PEFY-P72,96NMHSU-E

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Drain hose

Page 17

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HWE10170 GB

[6] Wiring Diagram

642

25431

85431

2131442331

4321

54321

12345

76543213

CN25

F01

IPM

(BLUE)

CNCT2

CNFAN

CNP

X010

X100

CNR1

(RED)

CNACL

ZNR

003

C015

C016

ZNR

002

DSA

001

ZNR

001

F001

F100

CNPW1

CNRSC

CNRSP

CNXC1

CNXB1

CNDB

CNPW2

CN18V

(GREEN)

CNTH

(RED)

CNCT1

CNRS2

CN15V

CNVDC

CNDP

CNINV

CNXC2

CN100

CN41

CN90

LED2

LED1

CN3A

(BLUE)

CN2M

(BLUE)

CN7V

CN60

CN44

CN4F CN4F

CN20

(RED)

CN32

SW3

SWC

SW5

SWA

SWE

ONOFF

SW2SW1

SW4

SW11SW12SW14

DIGIT DIGIT

( ) ( ) ( )

10ths

BRANCH

No.

CNXB2

POWER SUPPLY

AC208-230V

60Hz

Note 1

ACL

2 2

1 1

INSIDE SECTION OF CONTROL BOX

TO MA REMOTE

CONTROLLER

TO OUTDOOR UNIT

BC CONTROLLER

REMOTE CONTROLLER

UVW

NF.B.

INV.B.

I.B.

P.B .

TB2

DB01

ACCT

TB5

TB15

LEV1

LEV2

THHS

TH21

TH22FSTH23

3 4

33112

M1M2S(SHIELD)

DB01 RNF.B.

TB2

TB5

TB15

P. B .

I.B.

ACCT

INV.B.

PARTS LOCATION

Inside < > is the optional parts.

NOTE:1.The part of thin dotted line indicates the circuit for optional parts.

2.To perform a drainage test for the drain pump turn on the SWE

on the control board while the indoor unit is being powerd.

*Be sure to turn off the SWE after completing a drainage test or test run.

3.The wirings to TB2,TB5,TB15 shown in dotted line are field work.

4.Mark indicates terminal block, connector.

5.Use copper supply wire.

SYMBOL NAME

SYMBOL EXPLANATION

Aux. relay

X010,X100

Var ist or

Arrester

Intelligent power module

Fuse(AC250V 15A)

DSA001

IPM

F01

Electronic linear expan.valve

LEV1,LEV2

F001

F100

Fuse(AC250V 10A)

Fuse(3.15A)

Noise filter

Switch (for mode selection)

Switch (for capacity code)

Switch (for mode selection)

Switch (for model selection)

Switch (for mode selection)

Switch (1s digit address set)

Switch (10ths digit address set)

Switch (BRANCH No.)

Switch (for static pressure selection)

TB2

TB5

TB15

CN25

I.B.

NF.B.

INV.B.

P. B.

TH21

TH22

TH23

THHS

<FS>

Connector

Indoor controller board

Noise filter board

Inverter board

Power supply board

Power source terminal block

Transmission terminal block

Float switch

Thermistor(piping temp.detection/liquid)

Thermistor(piping temp.detection/gas)

Thermistor(heatsink)

Thermistor(inlet air temp.detection)

Fan motor

AC reactor (Power factor improvement)

Resistor

Diode bridge

LED (Power supply)

Current Sensor (AC)

LED (Remote controller supply)

ACL

DB01

LED1

ACCT

LED2

Connector (emergency operation)

Connector (Remote switch)

CN32

Connector (HA terminal-A)

CN41

Connector (Wireless)

CN90

SW1

SW2

SW3

SW4

SW5

SW11

SW12

SW14

SWA

SWC

SWE

ZNR01~

ZNR03

Drain pump

<DP>

t°

PEFY-P72,96NMHSU-E

Page 18

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HWE10170 GB

[7] Refrigerant system diagram

(A) Gas pipe thermistor TH23

(B) Gas pipe

(D) Brazed connections

(E) Strainer (#100 mesh)

(F) Linear expansion valve

(G) Liquid pipe thermistor TH22

(H) Heat exchanger

(I) Room temperature thermistor TH21

(H)

(I)

(F)

(E)

(C)

(G)

(A)

(D)

(B)

Page 19

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HWE10170 GB

[8] Troubleshooting

1. Check methods

1. Component and check points (1) Thermistor

Room temperature thermistor (TH21) Liquid pipe thermistor (TH22) Gas pipe thermistor (TH23)

Disconnect the connector and measure the resistance between terminals with a tester. (Ambient temperature 50°F (10°C) - 86°F (30°C))

1) Thermistor characteristic graph

(2) Fan motor

Refer to the page on "DC fan motor (fan motor/INV board)."(page 47)

(3) Linear expansion valve

Refer to the page on "LEV". ([8] 4)(page 51)

Normal Abnormal

4.3kΩ - 9.6kΩ Open or short

(Refer to the thermistor characteristic graph below.)

Low-temperature thermistor

Room temperature thermistor (TH21) Liquid pipe thermistor (TH22) Gas pipe thermistor (TH23)

Thermistor R

= 15 kΩ 3%

Multiplier of B = 3480 kΩ 2%

32°F (0°C) 15kΩ 50°F (10°C) 9.6kΩ 68°F (20°C) 6.3kΩ 77°F (25°C) 5.2kΩ 86°F (30°C) 4.3kΩ 104°F (40°C) 3.0kΩ

(A) Temperature °F (°C)

(B) Resistance (kΩ)

Rt = 15 exp { 3480( ) }

273+t

273

-20 -10 0 10 20 30 40 50

(A)

(B)

Page 20

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HWE10170 GB

2. Error Code Lists

Error Code

Prelimi-

nary error code

Error

(prelim-

inary) detail

code

Error code definition

Searched unit

Notes

0403

4300 4305

01 05

(Note)

Serial communication error O O

0900 - - Test run O

1102 1202 - Discharge temperature fault O

1301 - - Low pressure fault O

1302 1402 - High pressure fault O

1500 1600 - Refrigerant overcharge O

- 1605 - Preliminary suction pressure fault O

2500 - - Drain sensor submergence O

2502 - - Drain pump fault O

2503 - - Drain sensor (Thd) fault O O

2600 - - Water leakage O

2601 - - Water supply cutoff O

4102 4152 - Open phase O

4106 - - Transmission power supply fault O

4109 - - Fan operation status detection error O

4115 - - Power supply signal sync error O

4116 - - RPM error/Motor error O O

4220 4225

(Note)

4320 4325

(Note)

[108] Abnormal bus voltage drop O O

[109] Abnormal bus voltage rise O O

[111] Logic error O O

[131] Low bus voltage at startup O

4230 4235

4330 4335

- Heatsink overheat protection O O

4240 4340 - Overload protection O

4250 4255

(Note)

4350 4355

(Note)

[101] IPM error O O

[104] Short-circuited IPM/Ground fault O O

[105] Overcurrent error due to short-circuited motor O O

[106] Instantaneous overcurrent (S/W detection) O O

[107] Overcurrent (effective value) (S/W detection) O O

[121] Position detection error at startup O

[122] Position detection error during operation O

4260 - - Heatsink overheat protection at startup O

5101 1202 -

Temperature sensor fault

Return air temperature (TH21)

OA processing unit inlet temperature (TH4)

Outdoor unit

Indoor unit

LOSSNAY

Remote controller

Page 21

15- 15 -

HWE10170 GB

5102 1217 -

Temperature sensor fault

Indoor unit pipe temperature (TH22)

OA processing unit pipe temperature (TH2)

HIC bypass circuit outlet temperature (TH2)

5103 1205 00

Temperature sensor fault

Indoor unit gas-side pipe temperature (TH23)

OA processing unit gasside pipe temperature (TH3)

Pipe temperature at heatexchanger outlet (TH3)

5104 1202 -

Temperature sensor fault

OA processing unit intake air temperature (TH1)

Outside temperature (TH24)

Detectable only by the AllFresh type indoor units

Outdoor unit discharge temperature (TH4)

5105 1204 -

Temperature sensor fault

Accumulator inlet temperature (TH5)

5106 1216 -

Temperature sensor fault

HIC circuit outlet temperature (TH6)

5107 1221 -

Temperature sensor fault

Outside temperature (TH7) O

5110 1214 01

Temperature sensor fault

Heatsink temperature (THHS)

5201 - - High-pressure sensor fault (63HS1) O

5301 5305

4300 4305

[115] ACCT sensor fault O

[117] ACCT sensor circuit fault O O

[119] Open-circuited IPM/Loose ACCT connector O O

[120] Faulty ACCT wiring O

5701 - - Loose float switch connector O

6201 - -

Remote controller board fault (nonvolatile memory error)

6202 - - Remote controller board fault (clock IC error) O

6600 - - Address overlap OOOO

6601 - - Polarity setting error O

6602 - - Transmission processor hardware error OOOO

6603 - - Transmission line bus busy error OOOO

6606 - -

Communication error between device and transmission processors

OOOO

6607 - - No ACK error OOOO

Error Code

Prelimi-

nary error code

Error

(prelim-

inary) detail

code

Error code definition

Searched unit

Notes

Outdoor unit

Indoor unit

LOSSNAY

Remote controller

Page 22

16- 16 -

HWE10170 GB

The last digit in the check error codes in the 4000's and 5000's and two-digit detail codes indicate if the codes apply to

compressor inverter on fan inverter. Example Code 4225 (detail code 108): Bus voltage drop in the fan inverter system Code 4230 : Heatsink overheat protection in the compressor inverter system

There are no preliminary error codes or detail codes for indoor units.

XII

6608 - - No response error OOOO

6831 - -

MA controller signal reception error (No signal reception)

6832 - -

MA remote controller signal transmission error (Synchronization error)

6833 - -

MA remote controller signal transmission error (Hardware error)

6834 - -

MA controller signal reception error (Start bit detection error)

7100 - - Total capacity error O

7101 - - Capacity code setting error O O O

7102 - - Wrong number of connected units O

7105 - - Address setting error O

7106 - - Attribute setting error O

7110 - -

Connection information signal transmission/reception error

7111 - - Remote controller sensor fault O O

7113 - - Function setting error O

7117 - - Model setting error O

7130 - - Incompatible unit combination O

The last digit Inverter system

0 or 1 Compressor inverter system

5 Fan inverter system

Error Code

Prelimi-

nary error code

Error

(prelim-

inary) detail

code

Error code definition

Searched unit

Notes

Outdoor unit

Indoor unit

LOSSNAY

Remote controller

Page 23

17- 17 -

HWE10170 GB

1. Error Code

Serial communication error (Indoor unit)

2. Error definition and error detection method

Serial communication cannot be established between the Indoor controller board and the INV board.

3. Cause, check method and remedy (1) Faulty wiring

Check the following wiring connections.

1) Between Indoor controller board and Power supply board

2) Between Power supply board and INV board

(2) INV board failure or Indoor controller board failure or Power supply board failure

If the error persists after a power reset, replace the INV board, the Indoor controller board, or the Power supply board.

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

Drain sensor submergence (Models with a drain sensor)

2. Error definition and error detection method

1) If an immersion of the drain sensor in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage. While this error is being detected, humidifier output cannot be turned on.(Applicable to the units manufactured in or after October 2006)

2) If the immersion of the sensor in the water is detected four consecutive times at an hour interval, this is considered water leakage, and "2500" appears on the monitor.

3) Detection of water leakage is also performed while the unit is stopped.

4) Preliminary water leakage is cancelled when the following conditions are met:

One hour after the preliminary water leakage was detected, it is not detected that the drain pump goes from OFF to ON. The operation mode is changed to Cool/Dry. The liquid pipe temperature minus the inlet temperature is -10°C [-18°F] or less.

3. Cause, check method and remedy

0403

2500

CN100 CNRSC

Indoor controller board Power supply board

CNRSP CNRS2

Power supply board INV board

Cause Check method and remedy

(1) Drain water drainage problem

Clogged drain pump Clogged drain piping Backflow of drain water from other units

Check for proper drainage.

(2) Adhesion of water drops to the drain sensor

Trickling of water along the lead wire Rippling of drain water caused by filter clogging

1) Check for proper lead wire installation.

2) Check for clogged filter.

(3) Failure of the relay circuit for the solenoid valve Replace the relay.

(4) Indoor controller board failure

Drain sensor circuit failure

If the above item checks out OK, replace the indoor controller board.

Page 24

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HWE10170 GB

1. Error Code

Drain sensor submergence (Models with a float switch)

2. Error definition and error detection method

1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage. While this error is being detected, humidifier output cannot be turned on.

2) If the drain pump turns on within one hour after preliminary water leakage is detected and the above-mentioned condition is detected two consecutive times, water leakage error water leakage is detected, and "2500" appears on the monitor.

3) Detection of water leakage is also performed while the unit is stopped.

4) Preliminary water leakage is cancelled when the following conditions are met:

3. Cause, check method and remedy

2500

Cause Check method and remedy

(1) Drain water drainage problem

Clogged drain pump Clogged drain piping Backflow of drain water from other units

Check for proper drainage.

(2) Stuck float switch

Check for slime in the moving parts of the float switch.

Check for normal operation of the float switch.

(3) Float switch failure Check the resistance with the float switch turned on and

turned off.

6 minutes6 minutes

seconds

OFF

Drain pump operation triggered by a submergence of the liquid level sensor (except during the Cooing/Dry mode)

Drain pump output

Float switch input

Submergence of the sensor

Submergence of the sensor Preliminary water leakage

Submergence of the sensor

Water leakage

Sensor in the airSensor in the air

Within 1-hour periodWithin 1-hour period

Page 25

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HWE10170 GB

1. Error Code

Drain pump fault (Models with a drain sensor)

2. Error definition and error detection method

1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water. This condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode.

2) If another episode of the above condition is detected during the preliminary error, this is considered a drain pump error, and "2502" appears on the monitor.

3) This error is always detected while the drain pump is in operation.

4) The following criteria are met when the criteria for the forced stoppage of outdoor unit (system stoppage) are met.

∗"Liquid pipe temperature - inlet temperature -10°C [ -18 °F] " has been detected for 30 minutes. ∗The immersion of drain sensor is detected 10 consecutive times. ∗The conditions that are listed under items 1) through 3) above are always met before the criteria for the forced stoppage

of the outdoor unit.

5) The indoor unit that detected the conditions that are listed in item 4) above brings the outdoor unit in the same refrigerant circuit to an error stop (compressor operation prohibited), and the outdoor unit brings all the indoor units in the same refrigerant circuit that are in any mode other than Fan or Stop to an error stop. "2502" appears on the monitor of the units that came to an error stop.

6) Forced stoppage of the outdoor unit Detection timing: The error is detected whether the unit is in operation or stopped.

7) Ending criteria for the forced stoppage of outdoor unit Power reset the indoor unit that was identified as the error source and the outdoor unit that is connected to the same refrigerant circuit. Forced stoppage of the outdoor unit cannot be cancelled by stopping the unit via the remote controller. (Note) Items 1) - 3) and 4) - 7) are detected independently from each other.

The address and attribute that appear on the remote controller are those of the indoor unit that caused the error.

3. Cause, check method and remedy

2502

Cause Check method and remedy

(1) Drain pump failure Check for proper functioning of the drain pump.

(2) Drain water drainage problem

Clogged drain pump Clogged drain piping

Check for proper drainage.

(3) Adhesion of water drops to the drain sensor

Trickling of water along the lead wire Rippling of drain water caused by filter clogging

1) Check for proper lead wire installation.

2) Check for clogged filter.

(4) Indoor controller board failure

Drain pump drive circuit failure Drain heater output circuit failure

If the above item checks out OK, replace the indoor controller board.

(5) Items (1) through (4) above and an indoor unit elec-

tronic valve closure failure (leaky valve) occurred simultaneously.

Check the solenoid valves on the indoor unit for leaks.

Page 26

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HWE10170 GB

1. Error Code

Drain pump fault (Models with a float switch)

2. Error definition and error detection method

1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch.

∗Submergence of the sensor

When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water.

∗Sensor in the air

When it is detected that the float switch has been OFF for 15 seconds, it is interpreted that the sensor tip is not immersed in water.

2) If it is detected that the float switch has been ON for 3 minutes after the immersion of the sensor tip was detected, this is considered a drain pump failure, and "2502" appears on the monitor.

∗The total time it takes for this error to be detected is 3 minutes and 15 seconds, including the time it takes for the first im-

mersion of the sensor tip to be detected.

3) Detection of drain pump failure is performed while the unit is stopped.

4) The following criteria are met when the criteria for the forced stoppage of outdoor unit (system stoppage) are met.

∗"Liquid pipe temperature - inlet temperature - 10°C [ -18°F] " has been detected for 30 minutes. ∗It is detected by the float switch that the sensor tip has been immersed in water for 15 minutes or more. ∗The conditions that are listed under items 1) through 3) above are always met before the criteria for the forced stoppage

of the outdoor unit.

6) Forced stoppage of the outdoor unit Detection timing: The error is detected whether the unit is in operation or stopped. This error is detected whether the unit is in operation or stopped.

The address and attribute that appear on the remote controller are those of the indoor unit that caused the error.

3. Cause, check method and remedy

2502

Cause Check method and remedy

(1) Drain pump failure Check for proper functioning of the drain pump

mechanism

(2) Drain water drainage problem

Clogged drain pump Clogged drain piping

Check for proper drainage.

(3) Stuck float switch

Check for slime in the moving parts of the float switch.

Check for normal operation of the float switch.

(4) Float switch failure Check the resistance with the float switch turned

on and turned off.

(5) Indoor controller board failure

Drain pump drive circuit failure Float switch input circuit failure

Replace indoor controller board.

(6) Items (1) through (5) above and an indoor unit electronic

valve closure failure (leaky valve) occurred simultaneously.

Check the solenoid valves on the indoor unit for leaks.

Page 27

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HWE10170 GB

1. Error Code

Drain sensor (Thd) fault

2. Error definition and error detection method

If the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary

error, and the unit goes into the 3-minute restart delay mode.

If another episode of the above condition is detected during the preliminary error, this is considered a drain sensor error.(If

the short or open circuit of the thermistor is no longer detected, normal operation will be restored in 3 minutes.)

This error is detected when one of the following conditions are met.

∗During Cool/Dry operation ∗Liquid pipe temperature minus inlet temperature is equal to or smaller than - 10°C [ -18°F] (except during the defrost cycle) ∗When the liquid temperature thermistor or suction temperature thermistor or short or open circuited. ∗Drain pump is in operation. ∗One hour has elapsed since the drain sensor went off.

Short: 90°C [194 °F] or above Open: - 20°C [-4 °F] or below

3. Cause, check method and remedy

1. Error Code

Indoor unit fan operation error

2. Error definition and error detection method

1) Connector CN28 has remained open-circuited for 100 consecutive secondsduring operation.

3. Cause, check method and remedy

2503

Cause Check method and remedy

(1) Faulty connector (CN31) insertion. 1) Check for connector connection failure.

Reinsert the connector, restart the operation, and check for proper operation.

(2) Broken or semi-broken thermistor wire 2) Check for a broken thermistor wire.

(3) Thermistor failure 3) Check the resistance of the thermistor.

0°C[32 °F]:6.0k 10°C[50 °F]:3.9k 20°C[68°F]:2.6k 30°C[86°F]:1.8k 40°C[104 °F]:1.3k

(4) Indoor controller board (error detection circuit)

failure

4) Replace the indoor controller board if the problem recurs when the unit is operated with the No.-1 and No.-2 pins on the drain sensor connector (CN31) being short-circuited. If the above item checks out OK, there are no problems with the drain sensor. Turn off the power and turn it back on.

4109

Cause Check method and remedy

(1) Auxiliary relay (X13) fault The coil or the wiring of the auxiliary relay connected to

CN28 is faulty.

(2) Connector (CN28) is disconnected. Check the connector for proper connection.

(3) Blown fuse Check the fuse on the control circuit board.

(4) Motor error (thermistor error inside the motor) Check the unit fan for proper operation in the test run

mode. If no problems are found with items 1 through 3 above and the fan does not operate, replace the motor.

Page 28

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HWE10170 GB

1. Error Code

RPM error/Motor error

2. Error definition and error detection method

LOSSNAY

∗The motor keep running even if the power is OFF. ∗The thermal overload relay is ON. (Only for the three-phase model)

Indoor unit

If detected less than 180rpm or more than 2000rpm, the indoor unit will restart and keep running for 3 minutes.If detected again, the display will appear.

3. Cause, check method and remedy

1. Error Code

Abnormal bus voltage drop (Indoor unit)

2. Error definition and error detection method

If Vdc 130V or less is detected during Inverter operation. (S/W detection)

3. Cause, check method and remedy (1) Power supply environment

Check whether the unit makes an instantaneous stop when the detection result is abnormal or a power failure occurs. Check whether the power voltage is 198V or above across all phases.

(2) Voltage drop detected

Check the voltage at CNVDC (between pins 1 and 3(+)) on the INV board while the inverter is stopped and if it is less than 220V, check the following items.

1) Check the wiring between TB2 and NF board, NF board and ACL, NF board and inrush current resistor, NF board and DB01, NF board and INV board, NF board and indoor controller board.

2) Check the inrush current resistance.

Measure the interphase resistance of the resistor (R). 22  10%

3) Check ACL for broken wires.

Check that the resistance between pins 1 and 3 (housing side) of the CNACL connector is not infinite ( ).

4) Check the diode bridge (DB01) for problem.

Refer to section 5. "Troubleshooting the diode bridge".(page 50)

5) If no problems were found with items 1) through 4) above, replace the NF board.

(3) Indoor controller board failure

Confirm that DC12V is applied to the connector CNXB2 (between pins 4 and 5(+)) on the Indoor controller board while the inverter is operating. If not, replace the Indoor controller board.

(4) NF board failure

If the unit stops within 10 seconds after resuming operation and the same error is detected, replace the NF board.

(5) INV board failure

If no problems were found with items (1) through (4) above, replace the INV board.

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

4116

Cause Check method and remedy

(1) Board failure Replace the board.

(2) Motor malfunction Check for the motor and the solenoid switch.

(3) Solenoid switch malfunction

4225

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HWE10170 GB

1. Error Code

Abnormal bus voltage rise (Indoor unit)

2. Error definition and error detection method

If Vdc 425V is detected during inverter operation.

3. Cause, check method and remedy (1) Different voltage connection

Check the power supply voltage on the power supply terminal block (TB2).

(2) INV board failure

If the problem recurs, replace the INV board.

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

Logic error (Indoor unit)

2. Error definition and error detection method

H/W error If only the H/W error logic circuit operates, and no identifiable error is detected.

3. Cause, Check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

Heatsink overheat protection (Indoor unit)

2. Error definition and error detection method

When the heat sink temperature (THHS) remains at or above 85°C [185°F] is detected.

3. Cause, check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

4225

Cause Check method and remedy

(1) External noise If the problem recurs when the unit is put into opera-

tion, replace the INV board.

(2) INV board failure

4235

Cause Check method and remedy

(1) Air passage blockage Check that the heat sink cooling air passage is not blocked

(2) Fan motor error Check the fan motor for proper operation (sound, vibration, and rotation).

If any problems were found, check the items listed in sections 2 [3] and [4].

->Refer to [8] 3.2[3][4].(page 49)

(3) THHS failure If the problem persists after resuming operation, replace the THHS sensor.

(4) INV board fault If no problems were found with items (1) through (3) and the same error is de-

tected after resuming operation, replace the INV board.

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HWE10170 GB

1. Error Code

IPM error (Indoor unit)

2. Error definition and error detection method

IPM error signal is detected.

3. Cause, check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

Instantaneous overcurrent (Indoor unit) Overcurrent (Indoor unit)

2. Error definition and error detection method

Overcurrent 18 Arms and above is detected by the current sensor.

3. Cause, check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

4255

Cause Check method and remedy

(1) Power supply environment Check the power supply voltage.

Check whether the power voltage is 176V or above across all phases.

(2) Static pressure setting error Check that the static pressure setting and the design static pressure

are correct.

(3) Inverter failure or fan motor error 1) Refer to [8] 3.2.[1].(page 48)

2) Refer to [8] 3.2.[2].(page 48)

3) Refer to [8] 3.2.[3].(page 49)

4) Refer to [8] 3.2.[4].(page 49)

4255

Cause Check method and remedy

(1) Power supply environment Check the power supply voltage.

Check whether the power voltage is 176V or above across all phases.

(2) Static pressure setting error Check that the static pressure setting and the design static pres-

sure are correct.

(3) Inverter failure or fan motor error 1) Refer to [8] 3.2.[1].(page 48)

2) Refer to [8] 3.2.[2].(page 48)

3) Refer to [8] 3.2.[3].(page 49)

4) Refer to [8] 3.2.[4].(page 49)

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HWE10170 GB

1. Error Code

Short-circuited IPM/Ground fault (Indoor unit)

2. Error definition and error detection method

When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter.

3. Cause, check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

Overcurrent error due to short-circuited motor (Indoor unit)

2. Error definition and error detection method

When a short is detected on the load side just before starting the inverter operation.

3. Cause, Check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

4255

Cause Check method and remedy

(1) Ground fault of the fan motor Refer to [8] 3.2.[4].(page 49)

(2) Inverter failure 1) Refer to [8] 3.2.[1].(page 48)

2) Refer to [8] 3.2.[2].(page 48)

4255

Cause Check method and remedy

(1) Short-circuited fan motor coil or inverter failure 1) Refer to [8] 3.2.[1].(page 48)

2) Refer to [8] 3.2.[2].(page 48)

3) Refer to [8] 3.2.[3].(page 49)

(2) Output wiring Check for a short circuit

Page 32

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HWE10170 GB

1. Error Code

Position detection error at startup (Indoor unit)

2. Error definition and error detection method

Position error is detected by the hall sensor at inverter startup.

3. Cause, Check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

Position detection error during operation (Indoor unit)

2. Error definition and error detection method

Position error is detected by the hall sensor during operation.

3. Cause, Check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

4255

Cause Check method and remedy

(1) Loose connector Check the CNCT1 and CNINV connectors on the

INV board for proper connection.

(2) Inverter failure or fan motor error 1) Refer to [8] 3.2.[2].(page 48)

2) Refer to [8] 3.2.[3].(page 49)

4255

Cause Check method and remedy

(1) Loose connector Check the CNCT1 and CNINV connectors on the

INV board for proper connection.

(2) Inverter failure or fan motor error 1) Refer to [8] 3.2.[2].(page 48)

2) Refer to [8] 3.2.[3].(page 49)

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HWE10170 GB

1. Error Code

Return air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit)

Pipe temperature sensor (TH22) fault (Indoor unit) Pipe temperature sensor (TH2) fault (OA processing unit)

Gas-side pipe temperature sensor (TH23) fault (Indoor unit) Gas-side pipe temperature sensor (TH3) fault (OA processing unit)

Intake air temperature sensor (TH1) fault (OA processing unit) Intake air temperature sensor (TH24) fault (All-fresh (100% outdoor air) type indoor unit)

2. Error definition and error detection method

If a short or an open is detected during thermostat ON, the outdoor unit turns to anti-restart mode for 3 minutes. When the

error is not restored after 3 minutes (if restored, the outdoor unit runs normally), the outdoor unit makes an error stop. Short: detectable at 90°C [194°F] or higher

Open: detectable at -40°C [-40°F] or lower

Sensor error at gas-side cannot be detected under the following conditions.

∗During heating operation ∗During cooling operation for 3 minutes after the compressor turns on.

3. Cause, check method and remedy

5101

5102

5103

5104

Cause Check method and remedy

(1) Thermistor failure Check the thermistor resistor.

0°C [32°F]: 15 kohm 10°C [50°F]: 9.7 kohm 20°C [68°F] : 6.4 kohm 30°C [86°F] : 4.3 kohm 40°C [104°F] : 3.1 kohm

(2) Connector contact failure

(3) Disconnected wire or partial disconnected

thermistor wire

(4) Unattached thermistor or contact failure

(5) Indoor board (detection circuit) failure Check the connector contact.

When no fault is found, the indoor board is a failure.

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HWE10170 GB

1. Error Code

Heatsink temperature sensor (THHS) fault (Indoor unit)

2. Error definition and error detection method

When a short or an open of THHS is detected just before or during the inverter operation.

3. Cause, check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

ACCT sensor circuit fault (Indoor unit)

2. Error definition and error detection method

When abnormal value is detected by the ACCT detection circuit immediately before the inverter starts

3. Cause, check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

5110

Cause Check method and remedy

(1) Loose connector Check the CNTH on the INV board for proper connection.

(2) THHS sensor fault If the problem persists after resuming operation, replace the THHS sensor.

(3) INV board failure If no problems were found with items (1) and (2) above and the problem per-

sists after resuming operation, replace the INV board.

5305

Cause Check method and remedy

(1) INV board failure Refer to [8] 3.2.[1].(page 48)

(2) Fan motor error Refer to [8] 3.2.[4].(page 49)

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HWE10170 GB

1. Error Code

Open-circuited IPM/Loose ACCT connector (Indoor unit)

2. Error definition and error detection method

ACCT sensor detected that not enough current is available.

3. Cause, check method and remedy

Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter. (page 47)

1. Error Code

Loose float switch connector

2. Error definition and error detection method

Detection of the disconnected float switch (open-phase condition) during operation

3. Cause, check method and remedy (1) CN4F disconnection or contact failure

Check for disconnection of the connector (CN4F) on the indoor controller board.

5305

Cause Check method and remedy

(1) Disconnected ACCT sensor Check CNCT2 on the INV board for proper connection.

(2) ACCT sensor fault Disconnect the CNCT2 connector, and check the resistance between

the terminals. Refer to [8] 3.4.(page 50)

(3) Inverter failure or fan motor error 1) Refer to [8] 3.2.[2].(page 48)

2) Refer to [8] 3.2.[4].(page 49)

3) If no problems were found with items 1) and 2) above and the problem persists after resuming operation, replace the INV board and the ACCT sensor.

4) If the problem persists after taking step 3) above, replace the fan motor.

5701

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HWE10170 GB

1. Error Code

Address overlap

2. Error definition and error detection method

An error in which signals from more than one indoor units with the same address are received

The address and attribute that appear on the remote controller indicate the controller that detected the error.

3. Cause, check method and remedy

6600

Cause Check method and remedy

(1) Two or more of the following have the same address:

Outdoor units, indoor units, LOSSNAY units, controllers such as ME remote controllers. <Example> 6600 "01" appears on the remote controller Unit #01 detected the error. Two or more units in the system have 01 as their address.

Find the unit that has the same address as that of the error

source.Once the unit is found, correct the address.

Then, turn off the outdoor units, indoor units, and LOSSNAY units, keep them all turned off for at least five minutes, and turn them back on.

When air conditioning units are operating normally despite

the address overlap error Check the transmission wave shape and noise on the transmission line. Refer to the service handbook that came with the outdoor unit.

(2) Signals are distorted by the noise on the transmission

line.

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HWE10170 GB

1. Error Code

Transmission processor hardware error

2. Error definition and error detection method

Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line.

The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.

3. Cause

1) When the wiring work of or the polarity of either the indoor or outdoor transmission line is performed or is changed while the power is on, the transmitted data will collide, the wave shape will be changed, and an error will be detected.

2) Grounding fault of the transmission line

3) When grouping the indoor units that are connected to different outdoor units, the male power supply connectors on the multiple outdoor units are connected to the female power supply switch connector (CN40).

4) When the power supply unit for transmission lines is used in the system connected with MELANS, the male power supply connector is connected to the female power supply switch connector (CN40) on the outdoor unit.

5) Controller failure of the source of the error

6) When the transmission data is changed due to the noise on the transmission line

7) Voltage is not applied on the transmission line for centralized control (in case of grouped indoor units connected to different outdoor units or in case of the system connected with MELANS)

4. Check method and remedy

6602

Tightly reconnect the male power supply connector to the female power supply switch connector (CN40).

YES

Is the transmission line work performed while the power is on?

Check the power source of the indoor unit.

198 / 264V?

Check the transmission line work is performed and the shielded wire is treated properly.

Grounding fault or does the shielded wire contact with the transmission line?

System ?

Faulty power source work

Improper transmission line work

Turn off the power source of outdoor/indoor units, and turn them on again.

Investigation into the transmission line noise

Noise exist?

Controller failure of the source of the error

*For the investigation method, follow <Investigation method of transmission wave shape/noise>

Investigation into the cause of the noise

Correct the error.

System with the power supply unit for transmission lines

Is the male power supply connector connected to the female power supply switch connector (CN40) on only one of the outdoor unit?

Is the male power supply connector connected to the female power supply switch connector (CN40) ?

Confirm that the power supply connector on the outdoor unit is not plugged into CN40.

Disconnect the male power supply on CN40 and connect it to CN41

Single-outdoor-unit system

Multiple-outdoor-unit system

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HWE10170 GB

1. Error Code

Transmission line bus busy error

2. Error definition and error detection method

Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise

The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.

3. Cause, check method and remedy

1. Error Code

Communication error between device and transmission processors

2. Error definition and error detection method

Communication error between the main microcomputer on the indoor unit board and the microcomputer for transmission

The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.

3. Cause, check method and remedy

6603

Cause Check method and remedy

(1) The transmission processor cannot be transmit-

ted as the short-wavelength voltage like noise exists consecutively on the transmission line.

Check the transmission wave shape and noise on the transmission line. Refer to the service handbook that came with the outdoor unit.

-> No noise indicates that the error source controller is a failure.

-> If noise exists, investigate the noise.

(2) Error source controller failure

6606

Cause Check method and remedy

(1) Data is not properly transmitted due to accidental

erroneous operation of the controller of the error source.

Turn off the power source of the outdoor and the indoor units.(When the power source is turned off separately, the microcomputer will not be reset, and the error will not be corrected.)

-> If the same error occurs, the error source controller is a failure.

(2) Error source controller failure

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HWE10170 GB

1. Error Code

No ACK error

2. Error definition and error detection method

The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error is detected on the transmission side.)

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (1) System with one outdoor unit

6607

Error

source ad-

dress

Error display

Detection

method

Cause Check method and remedy

Outdoor unit (OC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to OC

(1) Contact failure of transmission

line of OC or IC

Turn off the power source of the outdoor unit, and turn it on again. If the error is accidental, it will run normally. If not, check the causes (1) - (4).

(2) Decrease of transmission line

voltage/signal by exceeding acceptable range of transmission wiring. Farthest:200 m [656ft] or less Remote controller wiring: 10m [32ft] or less

(3) Erroneous sizing of transmission

line (Not within the range below). Wire diameter:

1.25mm2 [AWG16] or more

(4) Indoor unit control board failure

Indoor unit (IC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at RC transmission to IC

(1) When IC unit address is changed

or modified during operation.

Turn off the outdoor/indoor units for 5 or more minutes, and turn them on again. If the error is accidental, they will run normally. If not, check the causes (1) - (5).

(2) Faulty or disconnected IC trans-

mission wiring

(3) Disconnected IC connector

(CN2M)

(4) Indoor unit controller failure

(5) ME remote controller failure

LOSSNAY (LC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to LC

(1) The power source of LOSSNAY

has been shut off.

Turn off the power source of LOSSNAY and turn it on again. If the error is accidental, it will run normally. If not, check the causes (1) - (5).

(2) When the address of LOSSNAY

is changed in the middle of the operation

(3) Faulty or disconnected transmis-

sion wiring of LOSSNAY

(4) Disconnected connector (CN1)

on LOSSNAY

(5) Controller failure of LOSSNAY

ME remote controller (RC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to RC

(1) Faulty transmission wiring at IC

unit side.

Turn off the power source of the outdoor unit for 5 minutes or more, and turn it on again. If the error is accidental, it will run normally. If not, check the causes (1) - (4).

(2) Faulty wiring of the transmission

line for ME remote controller

(3) When the address of ME remote

controller is changed in the middle of the operation

(4) ME remote controller failure

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HWE10170 GB

1. Error Code

No ACK error

2. Error definition and error detection method

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (2) Grouping of units in a system with multiple outdoor units

6607

Error

source

address

Error display

Detection

method

Cause Check method and remedy

Outdoor unit (OC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to OC

Same cause as that for system with one outdoor unit

Same remedy as that for system with one outdoor unit

Indoor unit (IC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at RC transmission to IC

(1) Same causes as (1) - (5) for

system with one outdoor unit

1) Turn off the power sources of the outdoor and indoor units for 5 or more minutes, and turn them on again. If the error is accidental, the will run normally.If not, check the cause 2).

(2) Disconnection or short circuit

of the transmission line for the outdoor unit on the terminal block for centralized control line connection (TB7)

2) Check the causes of (1) - (5). If the cause is found, correct it. If no cause is found, check 3).

(3) When multiple outdoor units

are connected and the power source of one of the outdoor units has been shut off.

3) Check the LED displays for troubleshooting on other remote controllers whether an error occurs.

(4) The male power supply con-

nector of the outdoor unit is not connected to the female power supply switch connector (CN40).

If an error is found,

-> If an error is found, check the check code definition, and correct the error. If no error is found,

-> Indoor unit board failure

(5) The male power supply con-

nectors on 2 or more outdoor units are connected to the female power supply switch connector (CN40) for centralized control.

If an error occurs, after the unit runs normally once, the following causes may be considered.

Total capacity error

(7100)

Capacity code error

(7101)

Error in the number of

connected units (7102)

Address setting error

(7105)

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HWE10170 GB

1. Error Code

No ACK error

2. Error definition and error detection method

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (2) Grouping of units in a system with multiple outdoor units

6607

Error

source

address

Error display

Detection

method

Cause Check method and remedy

LOSSNAY (LC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to LC

(1) Factors (1) through (5) in the

"Factors in system with one outdoor unit" (When performing an interlocked operation of the LOSSNAY unit and the indoor units that are connected to different outdoor units.)

1) Turn off the power source of LOSSNAY for 5 or more minutes, and turn it on again. If the error is accidental, it will run normally.If not, check the cause 2).

(2) Disconnection or short circuit

of the transmission line for the outdoor unit on the terminal block for centralized control line connection (TB7)

2) Check the causes of (1) - (5). If the cause is found, correct it. If no cause is found, check 3).

(3) When multiple outdoor units

are connected and the power source of one of the outdoor units has been shut off.

3) Same cause as that for indoor unit described in 3)

(4) The male power supply con-

nector of the outdoor unit is not connected to the female power supply switch connector (CN40).

(5) The male power supply con-

nectors on 2 or more outdoor units are connected to the female power supply switch connector (CN40) for centralized control.

If an error occurs, after the unit runs normally once, the following causes may be considered.

Total capacity error

(7100)

Capacity code error

(7101)

Error in the number of

connected units (7102)

Address setting error

(7105)

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HWE10170 GB

1. Error Code

No ACK error

2. Error definition and error detection method

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (2) Grouping of units in a system with multiple outdoor units

6607

Error

source

address

Error display

Detection

method

Cause Check method and remedy

ME remote controller (RC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to RC

(1) Same causes as (1) - (4) for

system with one outdoor unit

1) Turn off the power source of LOSSNAY for 5 or more minutes, and turn it on again. If the error is accidental, it will run normally.If not, check the cause 2).

(2) Disconnection or short circuit

of the transmission line for the outdoor unit on the terminal block for centralized control line connection (TB7)

2) Check the causes of (1) - (5). If the cause is found, correct it. If no cause is found, check 3).

(3) When multiple outdoor units

are connected and the power source of one of the outdoor units has been shut off.

3) Same cause as that for indoor unit described in 3)

(4) The male power supply con-

nector of the outdoor unit is not connected to the female power supply switch connector (CN40).

(5) The male power supply con-

nectors on 2 or more outdoor units are connected to the female power supply switch connector (CN40) for centralized control.

If the problem recurs after normal operation is restored, the problem is caused by one of the following factors:

Total capacity error

(7100)

Capacity code setting

error (7101)

Error in the number of

connected units (7102)

Address setting error

(7105)

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HWE10170 GB

1. Error Code

No ACK error

2. Error definition and error detection method

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (3) System connected to the system controllers (MELANS)

6607

Error

source

address

Error display

Detection

method

Cause Check method and remedy

Outdoor unit (OC)

ME remote controller (RC) System controller (SC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to OC

Same cause as that for system with one outdoor unit

Same remedy as that for system with one outdoor unit

Indoor unit (IC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at RC transmission to IC

Same as grouping of units in a system with multiple outdoor units

Same remedy as that for grouping of units in a system with multiple outdoor units

System controller (SC)

No acknowledgement (ACK) at SC transmission to IC

1. Error occurrence on some IC Same remedy as that for system with one outdoor unit

(1) Same cause as that for system with one

outdoor unit

2. Error occurrence on all IC in the system

with one outdoor unit

1) Check the LED display for troubleshooting on the outdoor unit.

(1) Total capacity error (7100) If an error is found,

check the check code definition, and correct the error.

If no error is found,

check 2).

(2) Capacity code error (7101)

(3) Error in the number of connected units

(7102)

(4) Address setting error (7105)

(5) Disconnection or short circuit of the trans-

mission line for the outdoor unit on the terminal block for centralized control line connection (TB7)

2) Check (5) - (7) on the left.

(6) Turn off the power source of the outdoor

unit

(7) Malfunction of electrical system for the

outdoor unit

3. Error occurrence on all IC Check voltage of the transmission line for centralized control.

20V or more: Check (1)

and (2) on the left.

Less than 20V: Check

(3) on the left.

(1) Same causes as (1) - (7) described in 2.

(2) The male power supply connectors on 2

or more outdoor units are connected to the female power supply switch connector (CN40) for the transmission line for centralized control.

(3) Disconnection or shutdown of the power

source of the power supply unit for transmission line

(4) System controller (MELANS) malfunction

Page 44

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HWE10170 GB

1. Error Code

No ACK error

2. Error definition and error detection method

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (3) System connected to the system controllers (MELANS)

6607

Error

source

address

Error display

Detection

method

Cause Check method and remedy

ME remote controller (RC)

ME remote controller (RC) System controller (SC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to RC

Same as grouping of units in a system with multiple outdoor units

Same remedy as that for grouping of units in a system with multiple outdoor units

System controller (SC)

No acknowledgement (ACK) at MELANS transmission to RC

1. Error occurrence on some IC Same remedy as that for system with one outdoor unit

(1) Same cause as that for system

with one outdoor unit

2. Error occurrence on all IC in the

system with one outdoor unit

1) Check the LED display for troubleshooting on the outdoor unit.

(1) An error is found by the outdoor

unit. Total capacity error (7100) Capacity code error (7101) Error in the number of connected units (7102) Address setting error (7105)

 If an error is found, check

the check code definition, and correct the error.

If no error is found, check

the cause 2).

(2) Disconnection or short circuit of the

transmission line for the outdoor unit on the terminal block for centralized control line connection (TB7)

2) Check (2) - (4) on the left.

(3) Turn off the power source of the

outdoor unit

(4) Malfunction of electrical system for

the outdoor unit

3. Error occurrence on all IC Check (1) - (4) on the left.

(1) Same causes as (1) - (4) described

in 2.

(2) When the power supply unit for

transmission lines is used and the male power supply connector is connected to the female power supply switch connector (CN40) for the transmission line for centralized control

(3) Disconnection or shutdown of the

power source of the power supply unit for transmission line

(4) System controller (MELANS) mal-

function

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1. Error Code

No ACK error

2. Error definition and error detection method

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (3) System connected to the system controllers (MELANS)

6607

Error

source

address

Error display

Detection

method

Cause Check method and remedy

System controller (SC)

ME remote controller (RC) MA remote controller (MA)

No acknowledgement (ACK) at IC transmission to SC

1. Error display on some displays on ME remote controllers

Check (1) - (3) on the left.

(1) Faulty wiring of the transmission

line for ME remote controller

(2) Disconnection or contact failure of

the transmission connector for ME remote controller

(3) ME remote controller failure

2. Error occurrence on all IC in the system with one outdoor unit

1) Check the LED display for troubleshooting on the outdoor unit.

(1) An error is found by the outdoor

unit. Total capacity error (7100) Capacity code error (7101) Error in the number of connected units (7102) Address setting error (7105)

 If an error is found, check

the check code definition, and correct the error.

If no error is found, check

the cause 2)

(2) Disconnection or short circuit of the

transmission line for the outdoor unit on the terminal block for centralized control line connection (TB7)

2) Check (2) - (4) on the left.

(3) Turn off the power source of the

outdoor unit

(4) Malfunction of electrical system for

the outdoor unit

3. Error display on all displays on ME remote controllers

Check (1) - (4) on the left

(1) Same causes as (1) - (4) described

in 2.

(2) When the power supply unit for

transmission lines is used and the male power supply connector is connected to the female power supply switch connector (CN40) for the transmission line for centralized control

(3) Disconnection or shutdown of the

power source of the power supply unit for transmission line

(4) System controller (MELANS) mal-

function

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1. Error Code

No ACK error

2. Error definition and error detection method

The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

3. System configuration (4) Errors that are not limited to a particular system

6607

Error

source ad-

dress

Error dis-

play

Detection

method

Cause Check method and remedy

Address which should not be existed

- - (1) Although the address of ME remote controller has been changed after the group is set using ME remote controller, the indoor unit is keeping the memory of the previous address. The same symptom will appear for the registration with SC.

Delete unnecessary information of non-existing address which some indoor units have. Use either of the following two methods for deletion.

(2) Although the address of

LOSSNAY has been changed after the interlock registration of LOSSNAY is made using ME remote controller, the indoor unit is keeping the memory of the previous address.

1) Address deletion by ME remote controller Delete unnecessary address information using the manual setting function of ME remote controller. Refer to Outdoor service handbook.

2) Deletion of connection information of the outdoor unit by the deleting switch

Note that the above method will delete all the group settings set via the ME remote controller and all the interlock settings between LOSSNAY units and indoor units.

Turn off the power source of

the outdoor unit, and wait for 5 minutes.

Turn on the dip switch (SW2-

2) on the outdoor unit control board.

Turn on the power source of

the outdoor unit, and wait for 5 minutes.

Turn off the power source of

the outdoor unit, and wait for 5 minutes.

Turn off the dip switch (SW2-

2) on the outdoor unit control board.

 Turn on the power source of

the outdoor unit.

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1. Error Code

No response error

2. Error definition and error detection method

When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect-

ed.

When the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side.

The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.

3. Cause

1) The transmission line work is performed while the power is on, the transmitted data will collide, and the wave shape will be changed.

2) The transmission is sent and received repeatedly due to noise.

3) Decrease of transmission line voltage/signal by exceeding acceptable range of transmission wiring. Farthest:200m [656ft] or less

Remote controller wiring:12m [39ft] or less

4) The transmission line voltage/signal is decreased due to erroneous sizing of transmission line. Wire diameter: 1.25mm

[AWG16] or more

4. Check method and remedy

1) When an error occurs during commissioning, turn off the power sources for the outdoor unit, indoor unit, and LOSSNAY for 5 or more minutes, and then turn them on again.

 When they return to normal operation, the cause of the error is the transmission line work performed with the power on. If an error occurs again, check the cause 2).

2) Check 3) and 4) above.

If the cause is found, correct it.  If no cause is found, check 3).

3) Check transmission wave shape/ noise on trans-mission line by following the instructions detailed in the Outdoor service handbook.

Noise is the most possible cause of the error "6608".

6608

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1. Error Code

MA controller signal reception error (No signal reception)

2. Error definition and error detection method

Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes.

3. Cause

1) Contact failure of the remote controller lines of MA remote controller or the indoor unit.

2) All the remote controllers are set to SUB.

3) Failure to meet wiring regulations

Wire length Wire size Number of remote controllers Number of indoor units

4) The remote controller is removed after the installation without turning the power source off.

5) Noise interference on the remote controller transmission lines

6) Faulty circuit that is on the indoor board and performs transmission/ reception of the signal from the remote controller

7) Problems with the circuit on the remote controller that sends or receives the signals from the remote controller

4. Check method and remedy

1) Check for disconnected or loose transmission lines for the indoor units or MA remote controllers.

2) Confirm that the power is supplied to the main power source and the remote controller line.

3) Confirm that MA remote controller's capacity limit is not exceeded.

4) Check the sub/main setting of the MA remote controllers.One of them must be set to MAIN.

5) Diagnose the remote controller (described in the remote controller installation manual). [OK]: no problems with the remote controller (check the wiring regulations)

[NG]: Replace the MA remote controller. [6832, 6833, ERC]: Due to noise interference <Go to 6)>

6) Check wave shape/noise on MA remote controller line by following the instructions detailed in the Outdoor service handbook.

7) When no problems are found with items 1) through 6), replace the indoor unit board or the MA remote controller. The following status can be confirmed on LED1 and 2 on the indoor unit board.

If LED1 is lit, the main power source of the indoor unit is turned on. If LED2 is lit, the MA remote controller line is being powered.

6831

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1. Error Code

MA remote controller signal transmission error (Synchronization error)

2. Error definition and error detection method

MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals

∗Indoor unit : 3 minutes ∗Remote controller : 6 seconds

3. Cause

1) Contact failure of the remote controller lines of MA remote controller or the indoor unit

2) 2 or more remote controllers are set to MAIN

3) Overlapped indoor unit address

4) Noise interference on the remote controller lines

5) Failure to meet wiring regulations

Wire length Wire size Number of remote controllers Number of indoor units

6) Problems with the circuit on the remote controller that sends or receives the signals from the remote controller