Mitsubishi PEFY-P12NMAU-E, PEFY-P06NMAU-E, PEFY-P27NMAU-E, PEFY-P36NMAU-E, PEFY-P15NMAU-E Technical & Service Manual

Air-Conditioners

TECHNICAL & SERVICE MANUAL

2009

Models

PEFY-P06NMAU-E, PEFY-P27NMAU-E
PEFY-P08NMAU-E, PEFY-P30NMAU-E
PEFY-P12NMAU-E, PEFY-P36NMAU-E
PEFY-P15NMAU-E, PEFY-P48NMAU-E
PEFY-P18NMAU-E, PEFY-P54NMAU-E
PEFY-P24NMAU-E

For use with R410A, & R22

Safety Precautions

Read before installation and performing electrical work

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.

Symbol explanations

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.

HWE09040 GB

ii

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.

Precautions for handling units for use with R410A

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.

HWE09040 GB

ii

CONTENTS

I

II

III

IV

V

VI

VII

VIII

IX

Features

[1] Features.................................................................................................................................... 1

Components and Functions

[1] Components and Functions...................................................................................................... 2

Specifications

[1] Specifications............................................................................................................................ 4

1.Specifications.......................................................................................................................... 4

2.Electrical component specifications........................................................................................ 7

Outlines and Dimensions

[1] Outlines and Dimensions.......................................................................................................... 8

Wiring Diagram

[1] Wiring Diagram......................................................................................................................... 9

Refrigerant System Diagram

[1] Refrigerant system diagram.................................................................................................... 11

Microprocessor Control

[1] Microprocessor Control........................................................................................................... 12

1.Cool operation ...................................................................................................................... 12

2.Dry operation ........................................................................................................................ 13

3.Fan operation........................................................................................................................ 14

4.Heat operation ...................................................................................................................... 15

5.Auto operation [Automatic cool / heat change over operation] ............................................. 16

6.When unit is stopped control mode ...................................................................................... 17

7.Heater control ....................................................................................................................... 17

Troubleshooting

[1] Troubleshooting ...................................................................................................................... 21

1.Check methods..................................................................................................................... 21

2.DC fan motor (fan motor/indoor control board)..................................................................... 25

3.Address switch setting .......................................................................................................... 26

4.Voltage test points on the control board ............................................................................... 27

5.Dipswitch setting (Factory setting)........................................................................................ 28

Disassembly Procedure

[1] Disassembly Procedure.......................................................................................................... 31

1.Control box ........................................................................................................................... 31

2.Thermistor (Intake air) .......................................................................................................... 32

3.Drainpan ............................................................................................................................... 33

4.Thermistor (Gas pipe) (Liquid pipe) ...................................................................................... 34

5.Fan and fan motor ................................................................................................................ 35

6.Heat exchanger .................................................................................................................... 36

HWE09040 GB

HWE09040 GB

[ I Features ]

IFea tures

[1] Features

PEFY-P06NMAU-E 6000/6700 1.8/2.0

PEFY-P08NMAU-E 8000/9000 2.3/2.6

PEFY-P12NMAU-E 12000/13500 3.5/4.0

PEFY-P15NMAU-E 15000/17000 4.4/5.0

PEFY-P18NMAU-E 18000/20000 5.3/5.9

PEFY-P24NMAU-E 24000/27000 7.0/7.9

PEFY-P27NMAU-E 27000/30000 7.9/8.8

PEFY-P30NMAU-E 30000/34000 8.8/10.0

PEFY-P36NMAU-E 36000/40000 10.6/11.7

PEFY-P48NMAU-E 48000/54000 14.1/15.8

PEFY-P54NMAU-E 54000/60000 15.8/17.6

Model Cooling capacity/Heating capacity

BTU/h kW

HWE09040 GB

- 1 -

[ II Components and Functions ]

IIComponen ts and Functions

[1] Components and Functions

1. Indoor (Main) Unit

(1) In case of rear inlet (2) In case of bottom inlet

Air inlet

Air outlet

2. Remote Controller
[PAR-21MAA]

Once the operation mode is selected, the unit will remain in the selected mode until changed.

Air inlet

Air outlet

(1) Remote Controller Buttons

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

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.

HWE09040 GB

- 2 -

[ II Components and Functions ]

(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,

M Room temperature

FAN, HEAT

F Function mode indicator N Vane setting

G Preset temperature O Fan speed

H Power indicator P Operation lamp

HWE09040 GB

- 3 -

[ III Specifications ]

III Specifications

[1] Specifications

1. Specifications

Model PEFY-P06NMAU-E PEFY-P08NMAU-E PEFY-P12NMAU-E PEFY-P15NMAU-E

Power source 1-phase 208/230V 60Hz
Cooling capacity *1 BTU / h 6,000 8,000 12,000 15,000
(Nominal) *1 kW 1.8 2.3 3.5 4.4

Power input kW 0.06 0.06 0.09 0.09

Current input A 0.56 0.56 0.66 0.67
Heating capacity *2 BTU / h 6,700 9,000 13,500 17,000
(Nominal) *2 kW 2.0 2.6 4.0 5.0

Power input kW 0.04 0.04 0.07 0.07

Current input A 0.45 0.45 0.55 0.56
External finish Galvanized
External dimension H x W x D in. 9-13/16x27-9/16x28-7/8 9-13/16x27-9/16x28-7/8 9-13/16x27-9/16x28-7/8 9-13/16x35-7/16x28-7/8

mm 250 x 700 x 732 250 x 700 x 732 250 x 700 x 732 250 x 700 x 732
Net weight lbs (kg) 51(23) 51(23) 51(23) 58(26)
Heat exchanger Cross fin(Aluminium fin and copper tube)
FAN Type x Quantity Sirocco fan x 1 Sirocco fan x 1 Sirocco fan x 1 Sirocco fan x 1

External in.WG 0.14-0.20-0.28-0.40-0.60
static press. Pa 35-50-70-100-150
Motor type DC brushless motor
Motor output kW 0.085 0.085 0.085 0.085
Driving mechanism Direct-driven by motor
Airflow rate cfm 212-265-300 212-265-300 265-318-371 353-424-494
(Low-Mid-High) m3 / min 6.0-7.5-8.5 6.0-7.5-8.5 7.5-9.0-10.5 10.0-12.0-14.0

L / s 100-125-142 100-125-142 125-150-175 167-200-233
Sound pressure level
(Low-Mid-High)
(measured in anechoic room)
Insulation material EPS, Polyethylene foam,Urethane foam
Air filter PP Honeycomb fabric
Protection device Fuse
Refrigerant control device LEV
Connectable outdoor unit R410A,R22 CITY MULTI

Diameter of Liquid (R410A)
refrigerant (R22 ) 1/4 (6.35) Brazed 1/4 (6.35) Brazed 1/4 (6.35) Brazed 1/4 (6.35) Brazed
pipe Gas (R410A)
(O.D.) (R22 ) 1/2 (12.7) Brazed 1/2 (12.7) Brazed 1/2 (12.7) Brazed 1/2 (12.7) Brazed
Diameter of drain pipe in. (mm) O.D. 1-1/4(32)
Drawing External KB94R527

Wiring KB94R531

Refrigerant cycle ­Standard Document Installation Manual, Instruction Book
attachment Accessory Insulation pipe for refrigerant pipe, Washer, Drain hose, Tie band
Optional External heater adaptor PAC-YU25HT
parts Filter box PAC-KE91TB-E PAC-KE91TB-E PAC-KE91TB-E PAC-KE92TB-E
Remark Installation Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other

Note : *1 Nominal cooling conditions *2 Nominal heating conditions Unit convertor

Indoor : 80degF D.B. / 67degF W.B. 70degF D.B. kcal/h = kW x 860

Outdoor : 95degF D.B. 47degF D.B. / 43degF W.B. cfm = m3/min x 35.31

Pipe length : 25 ft. (7.6 m) 25 ft. (7.6 m)

Level difference : 0 ft. (0 m) 0 ft. (0 m) *Above specification data is
*The external static pressure is set to 0.20in. WG(50Pa) at factory shipment. subject to rounding variation.
*Due to continuing improvement, above specification may be subject to change without notice.

dB <A> 26-28-29 26-28-29 28-30-34 28-30-34

in. (mm)

in. (mm)

(26.7degC D.B. / 19.4degC W.B.) (21.1degC D.B.) BTU/h = kW x 3,412

(35degC D.B.) (8.3degC D.B. / 6.1degC W.B.) lbs = kg / 0.4536

1/4 (6.35) Brazed 1/4 (6.35) Brazed 1/4 (6.35) Brazed 1/4 (6.35) Brazed

1/2 (12.7) Brazed 1/2 (12.7) Brazed 1/2 (12.7) Brazed 1/2 (12.7) Brazed

items shall be referred to the Installation Manual.
Due to continuing improvement, above specifications may be subject to change without notice.

HWE09040 GB

- 4 -

[ III Specifications ]

Model PEFY-P18NMAU-E PEFY-P24NMAU-E PEFY-P27NMAU-E PEFY-P30NMAU-E
Power source 1-phase 208/230V 60Hz
Cooling capacity *1 BTU / h 18,000 24,000 27,000 30,000
(Nominal) *1 kW 5.3 7.0 7.9 8.8

Power input kW 0.11 0.12 0.14 0.14

Current input A 0.77 1.04 1.18 1.18
Heating capacity *2 BTU / h 20,000 27,000 30,000 34,000
(Nominal) *2 kW 5.9 7.9 8.8 10.0

Power input kW 0.09 0.10 0.12 0.12

Current input A 0.66 0.93 1.07 1.07
External finish Galvanized
External dimension H x W x D in. 9-13/16x35-7/16x28-7/8 9-13/16x43-5/16x28-7/8 9-13/16x43-5/16x28-7/8 9-13/16x43-5/16x28-7/8

mm 250 x 900 x 732 250 x 1100 x 732 250 x 1100 x 732 250 x 1100 x 732
Net weight lbs (kg) 58(26) 71(32) 71(32) 71(32)
Heat exchanger Cross fin(Aluminium fin and copper tube)
FAN Type x Quantity Sirocco fan x 1 Sirocco fan x 2 Sirocco fan x 2 Sirocco fan x 2

External in.WG 0.14-0.20-0.28-0.40-0.60
static press. Pa 35-50-70-100-150
Motor type DC brushless motor
Motor output kW 0.085 0.121 0.121 0.121
Driving mechanism Direct-driven by motor
Airflow rate cfm 424-512-600 477-565-671 512-636-742 512-636-742
(Low-Mid-High) m3 / min 12.0-14.5-17.0 13.5-16.0-19.0 14.5-18.0-21.0 14.5-18.0-21.0

L / s 200-242-283 225-267-317 242-300-350 242-300-350
Sound pressure level
(Low-Mid-High)
(measured in anechoic room)
Insulation material EPS, Polyethylene foam,Urethane foam
Air filter PP Honeycomb fabric
Protection device Fuse
Refrigerant control device LEV
Connectable outdoor unit R410A,R22 CITY MULTI

Diameter of Liquid (R410A)
refrigerant (R22 ) 3/8 (9.52) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed
pipe Gas (R410A)
(O.D.) (R22 ) 5/8 (15.88) Brazed 5/8 (15.88) Brazed 5/8 (15.88) Brazed 5/8 (15.88) Brazed
Diameter of drain pipe in. (mm) O.D. 1-1/4(32)
Drawing External KB94R527

Wiring KB94R531

Refrigerant cycle ­Standard Document Installation Manual, Instruction Book
attachment Accessory Insulation pipe for refrigerant pipe, Washer, Drain hose, Tie band
Optional External heater adaptor PAC-YU25HT
parts Filter box PAC-KE92TB-E PAC-KE93TB-E PAC-KE93TB-E PAC-KE93TB-E
Remark Installation Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other

Note : *1 Nominal cooling conditions *2 Nominal heating conditions Unit convertor

Indoor : 80degF D.B. / 67degF W.B. 70degF D.B. kcal/h = kW x 860

Outdoor : 95degF D.B. 47degF D.B. / 43degF W.B. cfm = m3/min x 35.31

Pipe length : 25 ft. (7.6 m) 25 ft. (7.6 m)

Level difference : 0 ft. (0 m) 0 ft. (0 m) *Above specification data is
*The external static pressure is set to 0.20in. WG(50Pa) at factory shipment. subject to rounding variation.
*Due to continuing improvement, above specification may be subject to change without notice.

dB <A> 28-32-35 29-32-36 30-34-38 30-34-38

in. (mm)

in. (mm)

(26.7degC D.B. / 19.4degC W.B.) (21.1degC D.B.) BTU/h = kW x 3,412

(35degC D.B.) (8.3degC D.B. / 6.1degC W.B.) lbs = kg / 0.4536

1/4 (6.35) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed

1/2 (12.7) Brazed 5/8 (15.88) Brazed 5/8 (15.88) Brazed 5/8 (15.88) Brazed

items shall be referred to the Installation Manual.
Due to continuing improvement, above specifications may be subject to change without notice.

HWE09040 GB

- 5 -

[ III Specifications ]

Model PEFY-P36NMAU-E PEFY-P48NMAU-E PEFY-P54NMAU-E
Power source 1-phase 208/230V 60Hz
Cooling capacity *1 BTU / h 36,000 48,000 54,000
(Nominal) *1 kW 10.6 14.1 15.8

Power input kW 0.24 0.34 0.36

Current input A 1.50 2.08 2.24
Heating capacity *2 BTU / h 40,000 54,000 60,000
(Nominal) *2 kW 11.7 15.8 17.6

Power input kW 0.22 0.32 0.34

Current input A 1.39 1.97 2.13
External finish Galvanized
External dimension H x W x D in. 9-13/16x55-1/8x28-7/8 9-13/16x55-1/8x28-7/8 9-13/16x63x28-7/8

mm 250 x 1400 x 732 250 x 1400 x 732 250 x 1600 x 732
Net weight lbs (kg) 93(42) 93(42) 102(46)
Heat exchanger Cross fin(Aluminium fin and copper tube)
FAN Type x Quantity Sirocco fan x 2 Sirocco fan x 2 Sirocco fan x 2

External in.WG 0.14-0.20-0.28-0.40-0.60
static press. Pa 35-50-70-100-150
Motor type DC brushless motor
Motor output kW 0.244 0.244 0.244
Driving mechanism Direct-driven by motor
Airflow rate cfm 812-989-1165 989-1201-1412 1042-1254-1483
(Low-Mid-High) m3 / min 23.0-28.0-33.0 28.0-34.0-40.0 29.5-35.5-42.0

L / s 383-467-550 467-567-667 492-592-700
Sound pressure level
(Low-Mid-High)
(measured in anechoic room)
Insulation material EPS, Polyethylene foam,Urethane foam
Air filter PP Honeycomb fabric
Protection device Fuse
Refrigerant control device LEV
Connectable outdoor unit R410A,R22 CITY MULTI

Diameter of Liquid (R410A)
refrigerant (R22 ) 3/8 (9.52) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed
pipe Gas (R410A)
(O.D.) (R22 ) 3/4 (19.05) Brazed 3/4 (19.05) Brazed 3/4 (19.05) Brazed
Diameter of drain pipe in. (mm) O.D. 1-1/4(32)
Drawing External KB94R527

Wiring KB94R531

Refrigerant cycle ­Standard Document Installation Manual, Instruction Book
attachment Accessory Insulation pipe for refrigerant pipe, Washer, Drain hose, Tie band
Optional External heater adaptor PAC-YU25HT
parts Filter box PAC-KE94TB-E PAC-KE94TB-E PAC-KE95TB-E
Remark Installation Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other

Note : *1 Nominal cooling conditions *2 Nominal heating conditions Unit convertor

Indoor : 80degF D.B. / 67degF W.B. 70degF D.B. kcal/h = kW x 860

Outdoor : 95degF D.B. 47degF D.B. / 43degF W.B. cfm = m3/min x 35.31

Pipe length : 25 ft. (7.6 m) 25 ft. (7.6 m)

Level difference : 0 ft. (0 m) 0 ft. (0 m) *Above specification data is
*The external static pressure is set to 0.20in. WG(50Pa) at factory shipment. subject to rounding variation.
*Due to continuing improvement, above specification may be subject to change without notice.

dB <A> 32-37-41 35-40-44 36-41-45

in. (mm)

in. (mm)

(26.7degC D.B. / 19.4degC W.B.) (21.1degC D.B.) BTU/h = kW x 3,412

(35degC D.B.) (8.3degC D.B. / 6.1degC W.B.) lbs = kg / 0.4536

3/8 (9.52) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed

5/8 (15.88) Brazed 5/8 (15.88) Brazed 5/8 (15.88) Brazed

items shall be referred to the Installation Manual.
Due to continuing improvement, above specifications may be subject to change without notice.

HWE09040 GB

- 6 -

[ III Specifications ]

2. Electrical component specifications

Component Sym-

bol

Room temperature

TH21

thermistor

Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

PEFY-

P06NMAU-E

PEFY-

P08NMAU-E

PEFY-

P12NMAU-E

Liquid pipe thermistor TH22 Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

Gas pipe thermistor TH23 Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

Fuse FUSE 250V 6.3A

Fan motor 8-pole, Output 85W SIC-70CW-D885-1

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

Power supply terminal
block

Transmission terminal
block

TB2

TB5

TB15

(L1, L2, G) 250V 20A

(1, 2) 250V 15A, (M1, M2, S) 250V 20A

Drain float switch DS Open/short detection

Initial contact resistance 500 m or less

Component Sym-

bol

Room temperature

TH21 Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

PEFY-

P15NMAU-E

PEFY-

P18NMAU-E

PEFY-

P24NMAU-E

PEFY-

P27NMAU-E

PEFY-

P30NMAU-E

thermistor

Liquid pipe thermistor TH22 Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

Gas pipe thermistor TH23 Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

Fuse FUSE 250V 6.3A

Fan motor 8-pole, Output 85W

SIC-70CW-D885-2

8-pole, Output 121W

SIC-70CW-D8121-1

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

Power supply terminal

TB2 (L1, L2, G) 250V 20A

block

Transmission terminal
block

TB5

TB15

(1, 2) 250V 15A, (M1, M2, S) 250V 20A

Drain float switch DS Open/short detection

Initial contact resistance 500 m or less

Component Sym-

bol

Room temperature

TH21

thermistor

Liquid pipe thermistor TH22 Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k

Gas pipe thermistor TH23 Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

Fuse FUSE 250V 6.3A

Fan motor 8-pole, Output 244W SIC-101CW-D8244-1

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

Power supply terminal

TB2

block

Transmission terminal
block

TB5

TB15

Drain float switch DS Open/short detection

HWE09040 GB

PEFY-

P36NMAU-E

PEFY-

P48NMAU-E

PEFY-

P54NMAU-E

Resistance 0°C/15k, 10°C/9.6k, 20°C/6.3k, 25°C/5.4k, 30°C/4.3k, 40°C/3.0k

, 40°C/3.0k



(L1, L2, G) 250V 20A

(1, 2) 250V 15A, (M1, M2, S) 250V 20A

Initial contact resistance 500 m or less

- 7 -

[ IV Outlines and Dimensions ]

IV Outlines and Dimensions

[1] Outlines and Dimensions

1. PEFY-P06, 08, 12, 15, 18, 24, 27, 30, 36, 48, 54NMAU-E

Access door

777(30-5/8)

(11-13/16)

More than 300

450(17-3/4)

450(17-3/4)

Access door

(A)

50(2)

250~300

50(2)

H

(9-7/8~11-13/16)

Note2

Ceiling surface

More than 20(13/16)

More than 10(7/16)

(B)

(11-13/16)

Less than 300

0

-10

65

0

-7/16

(2-9/16 )

(27-9/16)

(Actual length)

Less than 700

<accessory>

Drain hose (I.D.ij32(1-1/4))

JKx(M-1)=NJ6(1/4)

(4-7/16) (4-7/16)

112 112 11(7/16)

KLK

Ø6.35

Liquid pipe

2

Unit:mm(in.)

Ø12.7

Gas pipe

1

P

10

(1/4)

(1/2)

(3/8)

Ø9.52

(5/8)

Ø15.88

12

10

10

12

(8-5/16)

18 (3/4) 210

Note 5

Suspension bolt hole

4-14x30(9/16X1-3/16) Slot

3-Ø2.9(1/8) mounting hole

Fresh air intake Ø100(3-15/16)

knock out hole

153 (6-1/16)

378 (14-15/16)

Drain pipe(O.D. Ø32(1-1/4))

(Emergency draining)

120°

(5-3/8)

135

120°

Ø125

(4-15/16)

200(7-7/8)

15 (5/8)

40 (1-5/8)40 (1-5/8)

2xE-Ø2.9(1/8)

Air filter

G

C

B(Suspension bolt pitch)

A

Air

inlet

Air

outlet

100(3-15/16)X(E-1)=F30 (1-3/16)

D(Duct)20 (13/16)

10 (7/16)

100(3-15/16)

73 (2-7/8)
58 (2-5/16)

100 (3-15/16)

21 (7/8)

23 (15/16)

(O.D.Ø32(1-1/4))

(28-7/8)

(27-9/16)

Drain pipe

(25-3/8)

732

700

643

(Suspension bolt pitch)

238 (9-3/8)

10 (7/16)

32 (1-5/16)

57 (2-1/4)

Refrigerant piping

2

P-ij2.9(1/8)

250 (9-7/8)
217 (8-9/16)

41 (1-5/8)

Control box

Terminal block(Transmission)

2×2-Ø2.9(1/8)

(DUCT)

Refrigerant piping

1

67136

(2-11/16)(5-3/8)

brazing connection (gas)

Terminal block(Power source)

356 (1/16)

33 (1-5/16) 122 (4-13/16)

100 (3-15/16)

Drain pump

brazing connection (liquid)

40 (1-5/8)
23 (15/16)178 (7-1/16)

N

780

990

(39)

1280

1480

(50-7/16)

5

4

4

M

LK

300150

(11-13/16)

260

330

(13)(1-15/16)

49

1200

(39-3/8) (2-3/16) (10-1/4) (30-3/4)

1058

(33-13/16)

1000

9

11

(33-7/8) (31-1/2)

1200

(39-3/8)(37-9/16)(35-7/16)

1154 1060

1100

(12-5/8)

54 320

(2-3/16)(59-1/16)

1500

(47-1/4)

(41-11/16)

1300 1358

(51-3/16) (53-1/2)

14

1360

(41-3/4) (39-3/8)

1500

(59-1/16) (53-9/16)

1454

(45-7/16) (47-1/4)

1400

(55-1/8) (57-1/4)

(43-5/16)

1700 54 370

15581500

16

1560

1700

16541600

(5-15/16)(1-3/4)

J

44800

H

1000 54

(31-1/2)

G

858

658

(25-15/16)

F

800

600

Drain pipe(O.D.Ø32(1-1/4))(Spontaneous draining)

7

860

660

CDE

800

1000

(31-1/2)

B

954900

(29-11/16)

A

700 754

(27-9/16) (26) (23-5/8)

Model

PEFY-P06,08,12NMAU-E

PEFY-P15,P18NMAU-E

PEFY-P24,27,30NMAU-E

PEFY-P36,48NMAU-E

PEFY-P54NMAU-E

(58-5/16)(14-5/8)(2-3/16)

5

(66-15/16)

(61-7/16) (59-1/16) (61-3/8)

(66-15/16)

(63) (65-1/8)

(A) Space required for service and maintenance.
(B) Provide an access door for maintenance at the bottom.

Note 1 Use M10 suspension bolts. (not supplied)

2 Provide an access door for maintenance at the bottom.
3 The dimensions in the table are those of the PEFY-P24, 27, 30, 36, 48, 54NMAU-E models, which have 2

fans. The PEFY-P06, 08, 12, 15, 18NMAU-E model have 1 fans.

4 To connect an intake duct, uninstall the air filter on the unit, and install a locally procured air filter on the intake

duct on the intake side.

5 Heat air to 0°C(32°F) or higher when taking fresh air with a fresh air intake.

HWE09040 GB

- 8 -

[ V Wiring Diagram ]

VWiring Diagram

[1] Wiring Diagram

1. PEFY-P06, 08, 12, 15, 18, 24, 27, 30, 36, 48, 54NMAU-E

FUSE (16A)

BREAKER (16A)

FO1

DSA

U

TB15

INSIDE SECTION OF CONTROL BOX

TO MA REMOTE

CONTROLLER

S(SHIELD)

2

1

PULL BOX

TO OUTDOOR UNIT

BC CONTROLLER

REMOTE CONTROLLER

TO NEXT INDOOR UNIT

TB5

TB2

G

L2

L1

M1

M2

2

1

ACL

P. B .

2

1

(Red)

CND

351

ZNRO1

ZNRO2

AC208-230V

POWER SUPPLY

60Hz

U

(Blue)

DC280-340V

1

CNP

Rectifier circuit

X10X01

(Blue)

3

CNXB1 CNXC1 CNXA1 CNMF

4567112321

4

5

3214

MS

3~

Fan motor

I.B.

LED1

(Red)

LED2

CN27

SW4

(Red)

SW1

SWA
SW5

CN105

3

(Blue)

1

CN3A

SW2

SW14

(Black)

CN2A

OFF

SW12

SWC

SWE

SW3

ON

2

1

(Blue)

CN2M

CN90

SW11

CN32

(Blue)

CNXB2

CN51

CN52

(Green)

CN44

CN60

CNXA2

CNXC2

1

CN41

(Red)

124

CN4F

21653

2

3

CN20

213

4

M

1~

Drainpump

431

2

1

542

TH21

t°

1

2

3

4

FS

TH23

TH22

t° t°

M

LEV

HWE09040 GB

- 9 -

[ V Wiring Diagram ]

Table.1 SYMBOL EXPLANATION

SYM-

BOL

NAME SYM-

BOL

NAME SYM-

I.B. Indoor controller board CN32 Connector (Remote switch) SW2

P.B. Power supply board CN41 Connector (HA terminal-A) SW3

TB2 Power source terminal block CN51 Connector (Centrally control) SW4

TB5 Transmission terminal block CN52 Connector (Remote indica-

tion)

TB15 Transmission terminal block CN90 Connector (Wireless) SWE

F01 Fuse AC 250V 6.3A CN105 Connector (IT terminal) SW11

ZNR01,02Varistor CN2A Connector (0-10V Analog in-

put)

DSA Arrester FS Float switch SW14

X01 Aux. relay TH21 Thermistor (inlet air temp.de-

tection)

X10 Aux. relay TH22 Thermistor (piping temp.de-

tection / liguid)

ACL AC reactor (Power factor im-

provement)

CN27 Connector (Damper) SW1

TH23 Thermistor (piping temp. de-

tection / gas)

Switch (for mode selection)

(I.B.)

BOL

(I.B.)

(I.B.)

(I.B.)

SW5
(I.B.)

(I.B.)

(I.B.)

SW12

(I.B.)

(I.B.)

SWA
(I.B.)

SWC

(I.B.)

NAME

Switch (for capacity code)

Switch (for mode selection)

Switch (for model selection)

Switch (for mode selection)

Connector (emergency opera­tion)

Switch (1s digit address set)

Switch (10ths digit address
set)

Switch (BRANCH No.)

Switch (for static pressure se­lection)

Switch (for static pressure se­lection)

Note 1 Wiring to TB2, TB5, and TB15 indicated by the double-dashed lines is on-site work.

2 terminal block, connector.
3 Use copper supply wire.

HWE09040 GB

- 10 -

[ VI Refrigerant System Diagram ]

VI Refrigerant System Diagram

[1] Refrigerant system diagram

(A)

(B)

(G)

(D)

(H)

(F)

(I)

(A) Gas pipe thermistor TH23

(B) Gas pipe

(C) Liquid 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

Capacity PEFY-

P06, 08, 12, 15NMAU-E

Gas pipe ø12.7 [1/2] R410A: ø12.7 [1/2]

Liquid pipe ø6.35 [1/4] R410A: ø6.35 [1/4]

PEFY-

P18NMAU-E

R22: ø15.88 [5/8]

R22: ø9.52 [3/8]

(C)

(E)(E)

PEFY-

P24, 27, 30NMAU-E

ø15.88 [5/8] R410A: ø15.88 [5/8]

ø9.52 [3/8] ø9.52 [3/8]

PEFY-

P36, 48, 54NMAU-E

R22: ø19.02 [3/4]

HWE09040 GB

- 11 -

[ VII Microprocessor Control ]

VII Microprocessor Control

[1] Microprocessor Control

1. Cool operation

<How to operate>

1. Press POWER [ON/OFF] button.

2. Press the operation [Mode] button to display COOL.

3. Press the [Set Temperature] button to set the desired tempera-

TIME SUN MON TUE WED THU FRI SAT

˚F˚C

TEMP.

MENU

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

TIMER
AFTER

ONLY1Hr.

ON/OFF

ERROR CODE

˚F˚C

OPERATION

ON
OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

FILTER

CHECK

CLEAR

TEST

1. Termoregulating function
(1) Thermoregulating function (Function to prevent restarting for 3 minutes)

Room temperature desired temperature + 2°F ···Thermo ON
Room temperature desired temperature ···Thermo OFF

ture.

The set temperature changes 2°F when the [Set Temperature]
button is pressed one time. Cooling 67 to 87°F

(2) Anti-freezing control

Detected condition :

When the liquid pipe temp. (TH22) is 32°F or less in 16 minutes from compressors start up, anti-freezing control starts and
the thermo OFF.

Released condition :

The timer which prevents reactivating is set for 3 minutes, and anti-freezing control is cancelled when any one of the following
conditions is satisfied.

1) Liquid pipe temp. (TH22) turns 50°F or above.

2) The condition of the thermo OFF has become complete by thermoregulating, etc.

3) The operation modes became mode other than COOL.

4) The operation stopped.

2. Fan
(1) By the remote controller setting (switch of 3 speeds+Auto)

Type Fan speed notch

3 speeds + Auto type [Low], [Med], [High], [Auto]

When [Auto] is set, fan speed is changed depending on the value of: Room temperature - Desired temperature

3. Drain pump
(1) Drain pump control

Always drain pump ON during the COOL and DRY mode operation. (Regardless of the thermo ON/ OFF)
When the operation mode has changed from the COOL or DRY to the others (including Stop), OFF the control after the drain

pump ON for 3 minutes.

(2) Float switch control

Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON/OFF.

In the water : Detected that the float switch is ON for 15 seconds.

HWE09040 GB

- 12 -

[ VII Microprocessor Control ]

In the air : Detected that the float switch is OFF for 15 seconds.

Float SW

ON

OFF

15sec. 15sec. 15sec. 1min.30sec. 1min.30sec.

In the water In the air In the water Error

postponement

2. Dry operation

<How to operate>

1. Press POWER [ON/OFF] button.

2. Press the operation [Mode] button to display DRY.

3. Press the [Set Temperature] button to set the desired tempera-

TIME SUN MON TUE WED THU FRI SAT

˚F˚C

TEMP.

MENU

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

TIMER
AFTER

ONLY1Hr.

ON/OFF

ERROR CODE

˚F˚C

OPERATION

ON
OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

FILTER

CHECK

CLEAR

TEST

1. Termoregulating function
(1) Thermo regulating function (Function to prevent restarting for 3 minutes)

Setting the Dry thermo by the thermo regulating signal and the room temperature (TH21).

Dry thermo ON Room temperature desired temperature + 2°F
Dry thermo OFF Room temperature desired temperature

ture.

The set temperature changes 2°F when the [Set Temperature]
button is pressed one time. Dry 67 to 87°F

Drain pump

abnormal

Room temperature

3 min. passed since starting operation

Thermo regulating signal Room temperature (T1)

83°F > T1 79°F 7 3

ON

Over 64°F

79°F > T1 75°F 5 3

75°F > T1 3 3

OFF Unconditional 3 10

Less than 64°F Dry thermo OFF

(2) Frozen prevention control

No control function

2. Fan
(1) Indoor fan operation controlled depends on the compressor conditions.

Dry thermo Fan speed notch

ON [Low]

Excluding the following Stop

OFF

Room temp. < 64°F [Low]

Dry thermo

ON time (min)

Dry thermo

OFF time (min)

T1 83°F 9 3

HWE09040 GB

- 13 -

[ VII Microprocessor Control ]

Remote controller setting is not acceptable.

3. Drain pump
(1) Same control as COOL operation

3. Fan operation

TIME SUN MON TUE WED THU FRI SAT
TIMER
AFTER

ERROR CODE

˚F˚C

TEMP.

MENU

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

˚F˚C

ONLY1Hr.

ON/OFF

OPERATION

ON
OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

FILTER

CHECK

CLEAR

<How to operate>

1. Press POWER [ON/OFF] button.

2. Press the operation [Mode] button to display FAN.

TEST

1. Fan
(1) Set by remote controller.

Type Fan speed notch

3 speeds + Auto type [Low], [Med], [High], [Auto]

When [Auto] is set, fan speed becomes [Low].

2. Drain pump
(1) Drain pump control

The drain pump turns ON for the specified amount of time when any of the following conditions is met:

1) ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode (FAN).

2) ON for 6 minutes after the float switch is submerged in the water when the float switch control judges the sensor is in the water.

(2) Float switch control

Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON/OFF.

In the water : Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.

Float SW

ON

OFF

15sec. 15sec. 15sec. 1min.30sec. 1min.30sec.

In the water In the air In the water Error

postponement

Drain pump

abnormal

HWE09040 GB

- 14 -

[ VII Microprocessor Control ]

4. Heat operation

<How to operate>

1. Press POWER [ON/OFF] button.

2. Press the operation [Mode] button to display HEAT.

3. Press the [Set Temperature] button to set the desired tempera-

TIME SUN MON TUE WED THU FRI SAT

˚F˚C

TEMP.

MENU

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

TIMER
AFTER

ONLY1Hr.

ON/OFF

ERROR CODE

˚F˚C

OPERATION

ON
OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

FILTER

CHECK

CLEAR

TEST

1. Termoregulating function
(1) Thermoregulating function (Function to prevent restarting for 3 minutes)

Room temperature desired temperature -2°F ···Thermo ON
Room temperature desired temperature ···Thermo OFF

ture.

The set temperature changes 2°F when the [Set Temperature]
button is pressed one time. Heating 63 to 83°F.

<Display in HEAT operation>

[DEFROST]
The [DEFROST] symbol is only displayed during the defrost op­eration.
[STANDBY]
The [STANDBY] symbol is only displayed during the hot adjust
mode.

2. Fan
(1) By the remote controller setting (switch of 3 speeds+Auto)

Type Fan speed notch

3 speeds + Auto type [Low], [Med], [High], [Auto]

When [Auto] is set, fan speed is changed depending on the value of:

Desired temperature - Room temperature
Give priority to under-mentioned controlled mode

1) Hot adjust mode

2) Preheating exclusion mode

3) Thermo OFF mode (When the compressor off by the thermoregulating)

4) Cool air prevention mode (Defrosting mode)

5) Capacity increasing mode

(2) Hot adjust mode

The fan controller becomes the hot adjuster mode for the following conditions.

1) When starting the HEAT operation

2) When the thermoregulating function changes from OFF to ON.

3) When release the HEAT defrosting operation

Hot adjust mode *1

Set fan speed by the remote controller

[Low]

[Extra Low]

A: Hot adjust mode starts.
B: 5 minutes have passed since the condition A or the indoor liquid pipe temperature turned 95°F or more.
C: 2 minutes have passed since the condition A. (Terminating the hot adjust mode)

*1 "STAND BY" will be displayed during the hot adjust mode.

(3) Preheating exclusion mode

When the condition changes the auxiliary heater ON to OFF (thermoregulating or operation stop, etc.), the indoor fan operates

in [Low] mode for 1 minute.

HWE09040 GB

CAB

- 15 -

[ VII Microprocessor Control ]

This control is same for the model without auxiliary heater.

(4) Thermo OFF mode

When the thermoregulating function changes to OFF, the indoor fan operates in [Extra low].

(5) Heat defrosting mode

The indoor fan stops.

3. Drain pump
(1) Drain pump control

The drain pump turns ON for the specified amount of time when any of the following conditions is met:

1) ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode (FAN).

2) ON for 6 minutes after the float switch is submerged in the water when the float swich control judges the sensor is in the water.

(2) Float switch control

Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON/OFF.

In the water : Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.

Float SW

ON

OFF

15sec. 15sec. 15sec. 1min.30sec. 1min.30sec.

In the water In the air In the water Error

postponement

5. Auto operation [Automatic cool / heat change over operation]

<How to operate>

1. Press POWER [ON/OFF] button.

2. Press the operation [Mode] button to display AUTO.

3. Press the [Set Temperature] button to set the desired tempera-

TIME SUN MON TUE WED THU FRI SAT

˚F˚C

TEMP.

MENU

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

TIMER
AFTER

ONLY1Hr.

ON/OFF

ERROR CODE

˚F˚C

OPERATION

ON
OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

FILTER

CHECK

CLEAR

TEST

1. Initial value of operation mode
(1) HEAT mode for room temperature < Desired temperature
(2) COOL mode for room temperature Desired temperature

ture.

The set temperature changes 2°F when the [Set Temperature]
button is pressed one time. Automatic 67 to 83°F

Drain pump

abnormal

2. Mode change
(1) HEAT mode -> COOL mode

Room temperature Desired temperature + 3°F. or 3 min. has passed

(2) COOL mode -> HEAT mode

Room temperature Desired temperature - 3°F. or 3 min. has passed

3. COOL mode
(1) Same control as cool operation

HWE09040 GB

- 16 -

[ VII Microprocessor Control ]

4. HEAT mode
(1) Same control as heat operation

The value "3°F" is modifiable from 1.8°F to 9°F by maintenance tool.

6. When unit is stopped control mode

1. Drain pump
(1) Drain pump control

The drain pump turns ON for the specified amount of time when any of the following conditions is met:

1) ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode (FAN).

2) ON for 6 minutes after the float switch is submerged in the water when the float switch control judges the sensor is in the water.

(2) Float switch control

Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON/OFF.

In the water : Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.

Float SW

ON

OFF

15sec. 15sec. 15sec. 1min.30sec. 1min.30sec.

In the water In the air In the water Error

postponement

Drain pump

abnormal

7. Heater control

1. Control specifications and DIP S/W setting
Table 1 shows how the field-installed heater is controlled. Select the desired pattern in the table below, and set the DIP S/W

on the outdoor and indoor units as shown in Table 1. See section 3 "Installation" for details. The table below shows Heater
Control patterns #A and B.

Table.2

Outdoor unit

setting

DIP S/W OFF
In the case of:
<TGMU>
S/W5-2 OFF
<THMU>
S/W5-10 OFF
<PUMY>
S/W4-4 OFF

DIP S/W ON
In the case of:
<TGMU>
S/W5-2 ON
<THMU>
S/W5-10 ON
<PUMY>
S/W4-4 ON

Condition of outdoor unit

N / A

Norm al drive
Defrost drive

Condition of O/U

a b cd

Outdoor temp.

㪧㪸㫉㪸㫄 㪼㫋㪼㫉㫊㩷a/b/c/d are set by㩷
maintenance tool.

H/P drive
H/P stop

Duct unit PE/PD/PF-NR(NL)

P06,08,12,15,18,24,27,30,36,48,

DIP S/W3-4

OFF

(Indoor unit)

DIP S/W3-4

ON

(Indoor unit)

Normal drive Heater OFF Heater OFF

DIP S/W3-4

OFF

(Indoor unit)

Defrost drive

H/P drive

H/P stop

DIP S/W3-4

ON

(Indoor unit)

Î

(PEFY-

54NMAU-E)

Heater control #A

(defrost/error:

Heater OFF)

Heater control #A

(defrost/error:

Heater ON)

Heater control #A

(defrost/error:

Heater OFF)

Heater control #B

(defrost/error:

Heater ON)

NON duct unit

(PL/PK/PC)

Heater control #A

(defrost/error:

Heater ON)

Heater control #B

(defrost/error:

Heater ON)

HWE09040 GB

- 17 -

[ VII Microprocessor Control ]

Table.3

Heater OFF

Heater control #A

Inlet air temp. set temp.
Heater ON
Inlet air temp. < set temp.-4°F

Heater control #B Heater OFF

Inlet air temp. set temp.
Heater ON
Inlet air temp. < set temp.-1.8°F

Inlet air tem p.

Set temp.
Set temp.-1.8°F

Inlet air temp.

Set temp.
Set temp.-1.8°F

Set tem p.-4°F

Heater output

ON
OFF

Heater output

ON
OFF

<For heater>
The value "4°F" is modifiable from 1.8°F to 9°F by maintenance tool.

(1) On the ducted model units (except the Fresh air intake type), turning on the heater with the fan setting set to OFF requires that

the DIP S/W and connectors on the indoor units*1 are set on site.
*1: DIP SW 3-4, CN24, and CN4Y (or CN22)

Fan control

Pattern Duct unit PE/PD/PF-NR(NL)

Î

(PEFY-NMSU-E, PEFY-NMAU-E)

CN4Y or CN22 for FAN control
(YU25)

1

Disabled

2 ON L / LL / Set

3

DIP S/W3-4 (Indoor unit) Fan in defrost

OFF Stop (Heater OFF)

*1

(Heater ON)

OFF Stop (Heater OFF)

Enabled

4 ON Stop (Heater ON)

*1. depend on SW1-7/1-8

SW3-1 SW1-7 SW1-8 Fan speed

*1

OFF OFF OFF Very low

OFF ON OFF Low

OFF OFF ON Remote controller setting

OFF ON ON

ON ON ON

(Remote controller setting

(Remote controller setting*2)

Stop

Stop

*2

)

*1. The fan operates at the same speed settings as shown in this table during

the Heating Thermo-OFF mode.

*2. If Pattern 2 in the table above is selected for the fan control pattern, the

fan will follow the setting of the remote controller.

<Image>

CN4Y or CN22 for FAN control
(PAC-YU25HT)

Indoor unit Control board

HWE09040 GB

- 18 -

[ VII Microprocessor Control ]

(2) On the Fresh air intake type units, the heater cannot be turned on with the fan setting set to OFF.
(3) Non-ducted models do not require the settings described in Section (1) above.

Reference (not applicable to the ducted models)

Pattern NON duct unit (PL/PK/PC)

CN4Y or CN22 for FAN control

*1

(YU25)

DIP S/W (Indoor unit) Fan in defrost

1 N/A N/A Stop (Heater ON)

*1. Refer to Section 5 "Dipswitch Setting" for further information about each switch.

(4) Back-up heating will not be performed when the heater turns on while demand control is performed (not a request item).
(5) This is applicable only to the R410 series. Make the settings for the following dip switches on the outdoor unit control board

before switching on the power.

This is applicable only to the R410A series. Make the settings for the following dip switches on the indoor unit control board
before switching on the power.

2. PAC-YU25HT (Optional Parts) installation

The following section describes installation of the External Heater Adapter that connects to CITY MULTI air conditioner R410A
series indoor unit. This products is the special wiring parts to drive an electric heater with the air conditioner.

(1) Parts list

Check that the following parts are included in the package.

1) External output cable (with a yellow connector).............................2 in total

Two types of cables with different connectors are included.

2) Panel heater connector.................................................................. 3 in total

White: 1
Green: 2 (2 types)

(2) Connection to the indoor unit

Use the cables that fit the connectors on the indoor unit control board. The items listed in this parts list cannot be used with

the following models.
PMFY-BM

PMFY-AM

1) External output cable (with a yellow connector)

This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater. Connect the
cable to CN24 on the indoor unit control board.

2) Panel heater connector (with a green connector)

This connector is used to perform an interlocked operation with a panel heater. Depending on the indoor unit control board
specification, connect the cable either to CN4Y or CN22 as appropriate.

(3) Locally procured wiring

A basic connection method is shown below.

1) PEFY-P-NMSU-E and other models

Remote control board Relay circuit

retaeHcirtcelE

ecruosrewop

X

Electric Heater
or panel
heater

Preparations in the field

Indoor unit

Adapter

Red 1

X

White 2

White 1

(applicable only when a panel
heater is connected)

Maximum cable length
is 10 m (32ft)

3

control board

wo
lleYe

tihW

CN24

CN22

CN4Y

Outdoor unit
control board

• PUHY, PURY-P­TGMU type Dip
switch SW5-2
“ON”

• PUHY, PURY-P­YHMU type Dip
switch SW5-10
“ON”

• PUMY series Dip
switch SW4-4
“ON”

HWE09040 GB

- 19 -

[ VII Microprocessor Control ]

2) PEFY-P-NMAU-E, PEFY-P-NMHU-E, PDFY-P-NMU-E and other models

Remote control board Relay circuit

retaeHcirtcelE

ecruosrewop

X

Electric Heater
or panel
heater

Preparations in the field

Adapter

Red 1

X

White 2

White 1

(applicable only when a panel
heater is connected)

Maximum cable length
is 10 m (32ft)

2

Indoor unit
control board

wolle

Ynee

r
G

CN24

CN22

For relay X use the specifications given below Operation coil

Rated voltage: 12VDC
Power consumption: 0.9W or less
* Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.

The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft.)
To extend this length, use sheathed 2-core cable.

Control cable type: CVV, CVS, CPEV or equivalent.
Cable size: 0.5 mm

2

~ 1.25 mm2 (16 to 22 AWG)

Don't extend the cable more than 10 meters (32ft)

Outdoor unit
control board

• PUHY, PURY-P­TGMU type Dip
switch SW5-2
“ON”

• PUHY, PURY-P­YHMU type Dip
switch SW5-10
“ON”

• PUMY series Dip
switch SW4-4
“ON”

Recommended circuit

Wiring diagram

1-phase power
supply

208V, 230V/60Hz

R

S

R

S

Control board

88H

88H

CN24

88H

FS1

FS2
FS1

FS2

26H

H1

H2

FS1, 2 ----- Thermal fuse

H1, H2 ----- Heater

26H --------- Overheat protection

88H --------- Electromagnetic contactor

thermostat

(4) Wiring restrictions

Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32ft).
Longer than 10 meters (32ft) could cause improper operation.
Use a transit relay when extending wiring such as remote wiring.

HWE09040 GB

- 20 -

[ VIII Troubleshooting ]

VIII Troubleshooting

[1] 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 10°C - 30°C[50°F-86°F])

Normal Abnormal

4.3k - 9.6k Open or short

(Refer to the thermistor characteristic graph below.)

1) Thermistor characteristic graph

Low-temperature thermistor

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

Thermistor R
Multiplier of B = 3480 k 2%

= 15 k 3%

0

50

40

Rt = 15 exp { 3480( ) }

1

273+t

0°C 32°F 15k
10°C 50°F 9.6k
20°C 68°F 6.3k

1

273

30

(B)

20

25°C 77°F 5.2k
30°C 86°F 4.3k
40°C 104°F 3.0k

(A) Temperature (°C)[°F]

10

(B) Resistance (k )

0

-20 -10 0 10 20 30 40 50

-4 14 32 50 68 86 104 122

(A)

(2) Fan motor (CNMF)

Refer to the page on "DC fan motor (fan motor/indoor control board)."

(3) Linear expansion valve

Disconnect the connector, and measure the resistance between terminals with a tester.
Refer to the next page for details.

Normal Abnormal

200 k 10%

M

LEV

CN60

(F)

1

(E)

2

(D)

3

(C)

4

(B)

5

(A)

6

1-5 2-6 3-5 4-6 Open or short

White-Red Yellow-Brown Orange-Red Blue-Brown

(A) Brown (D) Orange

(B) Red (E) Yellow

(C) Blue (F) White

HWE09040 GB

- 21 -

[ VIII Troubleshooting ]

1) Summary of linear expansion valve (LEV) operation

The LEV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board.
The LEV position changes in response to the pulse signal.

Indoor control board and LEV connection

(G)

12VDC

(F)

(J)

(C)

4

M

5

1

(D)

(B)

(A)

6

(E)

2
3

(A)

(B)

(C)

(D)

(E)

(F)

6

5

4

3

2

1

(H)

(A) Brown (F) White

(B) Red (G) Control board

(C) Blue (H) Connection (CN60)

(D) Orange (I) Drive circuit

(E) Yellow (J) Linear expansion valve

Pulse signal output and valve operation

Phase

number

1234

Output pulse

ø1 ON OFF OFF ON
ø2 ON ON OFF OFF
ø3 OFF ON ON OFF
ø4 OFF OFF ON ON

The output pulse changes in the following order:
When the valve closes 1 -> 2 -> 3 -> 4 -> 1

When the valve opens 4 -> 3 -> 2 -> 1 -> 4

When the valve position remains the same, all output signals will be OFF.
If any output signal is missing or if the signal remains ON, the motor vibrates and makes clicking noise.

(I)

HWE09040 GB

- 22 -

[ VIII Troubleshooting ]

2) LEV operation

(a) Close

(b) Open

(c) Fully open valve (2000 pulses)

(d) No. of pulses

(a)

(f)

(b)

(c)

(d)

(e)

(e) Extra tightning (80 - 100 pulse)

(f) Valve opening degree

When the power is turned on, a pulse signal of 2200 pulses is output (valve closure signal), to bring the valve to position A.
When the valve is operating normally, it is free of vibration noise. If the valve locks or when it goes from point E to A in the

figure, it makes louder noise than would be heard when there is an open phase.

Check for abnormal sound/vibration by placing the metal tip of a screwdriver against the valve and the handle side against

your ear.

3) Troubleshooting

Symptom Checking Criteria Remedy

Circuit failure on
the microcomputer

Disconnect the connectors on the control board, and connect LEDs to test the cir­cuit as shown below.

6
5
4
3
2

1 k

LED

1

Pulse signals are output for 10 seconds when the main power is turned on. If there
are LEDs that do not light up at all or remain lit after the pulses are turned off, there
is a problem with the driving circuit.

Locked LEV The motor will idle and make small clicking noise if it is run while the LEV is locked.

If this clicking noise is heard both when the valve is fully closed and while it is being
opened, it indicates a problem.

Disconnected or
shorted LEV motor

easure the resistance between the coils with a tester (red-white, red-orange,
brown-yellow, brown-blue). The normal range of resistance is 150 10%

coils

Replace the in­door control
board if driving
circuit failure is
detected.

Replace the LEV.

Replace the LEV.

HWE09040 GB

- 23 -

[ VIII Troubleshooting ]

Symptom Checking Criteria Remedy

Valve closure fail­ure (leaky valve)

Misconnections of
connectors or con­tact failure

To check the LEV on the indoor unit, check the indoor unit liquid pipe temperature
that appears on the operation monitor on the outdoor unit's multi control board while
operating the indoor unit in question in the FAN mode and the other indoor units in
the cooling mode.

(A) Termistor (TH22)

(A)

LEV

Normally, the LEV is fully closed while the unit is in the FAN mode. If the valve is
leaky, liquid pipe thermistor reading will be lower than normal. If it is significantly
lower than the inlet temperature on the remote controller, valve closure failure is
suspected. If the amount of leakage is insignificant, replacement of LEV is unnec­essary unless it is causing a problem.

Perform a visual check for disconnected connectors.
Perform a visual check of lead wire color.

Replace the LEV
if the amount of
leakage is great.

Disconnect the
connectors on
the control board
and perform a
continuity test.

(4) Drain-up mechanism

Measure the resistance between the terminals with a tester.
(coil temperature 20°C[68°F])

Normal Abnormal

1
3

340 Open or short

(5) Drain float switch (CN4F)

Disconnect the connector, and measure the resistance between terminals with a tester.

(A) Moving part

(A)

1

(B)

(C)

(B) Switch

(C) Magnet

2
3
4

(A)

Position of the moving part Normal Abnormal

Up Short (any position but short)

Down Open (any position but open)

HWE09040 GB

- 24 -

[ VIII Troubleshooting ]

2. DC fan motor (fan motor/indoor control board)

1. CAUTION

A high voltage is applied to the connector for connection to the fan motor (CNMF).
Do not unplug the connector CNMF with the unit energized to avoid damage to the indoor control board and fan motor.

2. Troubleshooting
Symptom: Indoor unit fan does not run.

Check fan motor connector contact
(CNMF).

Is the fan motor connector

No

Fix the connection.

(CNMF) fully inserted?

V

Yes

Power supply voltage

DC

Check the power supply.
Measure the voltage at the indoor control board.

294 - 340VDC (same with the voltage between fan connector 1 (+) and 4(-))

Power supply voltage V

208VAC
220VAC
230VAC
240VAC

DC

294VDC
311VDC
325VDC
340VDC

15VDC (same with the voltage between fan connector 5 (+) and 4(-))
1 - 6.5VDC (same with the voltage between fan connector 6 (+) and 4(-))

[Values for Vsp are the values that are measured with the fan motor in operation.
Vsp is 0V when the fan motor is stopped.]

Is the voltage within the

No

Replace the indoor control board.

normal range?

Yes

Check the fan motor position thermistor signal.
Get the motor to make a full rotation or more, and measure the voltage at the test point
V

FG.

(same with the voltage between fan connector 7 (+) and 4(-))

Are 0VDC and 15VDC
displayed alternately?

Yes

Replace the indoor control board.

HWE09040 GB

No

Replace the motor.

- 25 -

[ VIII Troubleshooting ]

3. Address switch setting

Make sure that power to the unit is turned off.

(A)

(B)

ON

OFF

(A) Indoor unit control board

(B) Factory setting (all models)

1. When using an ME remote controller, set the address with the rotary switches (SW11, SW12).
Address setting is not required when the unit remote controller is used.

On-site address setting is required for the indoor units to run.

2. Address settings vary in different systems.

Refer to the section on address setting in the outdoor unit installation manual.

3. Address is set with a combination of SW12 (10's digit) and SW11 (1's digit).

To set the address to "3," set SW12 to "0" and SW11 to "3."
To set the address to "25," set SW 12 to "2" and SW 11 to "5."

ON

OFF

HWE09040 GB

- 26 -

[ VIII Troubleshooting ]

4. Voltage test points on the control board

1. PEFY-P06, 08, 12, 15, 18, 24, 27, 30, 36, 48, 54NMAU-E

CN2M

CN3A

CN24

SW2

SW4

SW3

Indoor controller board

CND

CNP

CN32

F01

CN41
CN51

CN52

CN20

CN4F
CN44

CN22

SWE

C25(*1)
CNMF

F01 Fuse(AC 250V 6.3A)

CND Power supply voltage (220 -

240VAC)

CN2M For M-NET transmission cable

connection (24 - 30VDC)

SWE Emergency operation

SW2 Capacity setting

SW4 Function setting

SW3 Function setting

CN32 Remote start/stop adapter

CN3A For MA remote controller cable

connection
(10 - 13 VDC (Between 1 and 3.))

CN52 Remote display

CN51 Centralized control

CN41 JAMA standard HA terminal A

CN44 Thermistor (liquid/gas tempera-

ture)

CN4F Float thermistor

CN22 For fan control

CN24 For heater control

CN20 Thermistor (Inlet temperature)

CNMF Fan motor output

1 - 4: 310 - 340 VDC
5 - 4: 15 VDC
6 - 4: 0 - 6.5 VDC
7 - 4: Stop 0 or 15 VDC

Run 7.5 VDC
(0 - 15 pulse)

CNP Drain-up mechanism output

(200VAC)

(*1)

Voltage on the (-) side of PC51

V

FG

and C25
(Same with the voltage between 7
(+) and 4 (-) of CNMF)

VCCVoltage between the C25 pins

15 VDC
(Same with the voltage between 5
(+) and 4 (-) of CNMF)

Vsp Voltage between the C53 pins

0VDC (with the fan stopped)
1 - 6.5VDC (with the fan in opera­tion)
(Same with the voltage between 6
(+) and 4 (-) of CNMF)

PC51(*1)

Power supply board

HWE09040 GB

C53(*1)

- 27 -

[ VIII Troubleshooting ]

5. Dipswitch setting (Factory setting)

1. Function setting

(1) SW1

Switch position Function Switch setting

ON OFF

1 Active Thermistor (Intake air

thermistor)

2 Filter clogging detection Available Unavailable
3 Filter life 2500 hr 100 hr
4 Outdoor air intake Enabled Disabled
5 Remote display Thermo-ON signal Fan output
6 Humidifier operation During heating mode During heating operation
7 Fan speed Low Very low
8 Fan speed at heating Thermo-OFF Preset fan speed Follows the setting of SW1-7
9 Auto restart after power failure Enabled Disabled

10 Power start/stop Enabled Disabled

1) Adress board

Factory setting

Built-in thermistor on the remote
controller

Indoor unit

(2) SW3

Switch position Function Switch setting

ON OFF
1 Unit type Cooling only Heat pump
2- - ­3- - ­4 Heater backup Enabled Disabled
5- - ­6- - ­7- - ­8 Heating 4-deg up Disabled Enabled
9- - -

10 - - -

1) Indoor control board
Dipswitch settings must be made while the unit is stopped.

Factory setting

PEFY-P08, 18, 24, 27, 36, 48, 54NMAU-EPEFY-P06, 15NMAU-E PEFY-P12, 30NMAU-E

HWE09040 GB

- 28 -

[ VIII Troubleshooting ]

2. Capacity code setting

(1) SW2

1) Indoor control board
Dipswitch settings must be made while the unit is stopped.

Factory setting
The switches are set to correspond to the unit capacity.

PEFY-P08NMAU-EPEFY-P06NMAU-E PEFY-P12NMAU-E PEFY-P15NMAU-E

PEFY-P18NMAU-E PEFY-P24NMAU-E PEFY-P27NMAU-E PEFY-P30NMAU-E

PEFY-P36NMAU-E PEFY-P48NMAU-E PEFY-P54NMAU-E

3. Model setting

(1) SW4

1) Indoor control board
Dipswitch settings must be made while the unit is stopped.

Factory setting

Note:
Changes made to the dipswitches SW1, SW2, and SW3 will become effective when the unit comes to a stop (remote controller
off). There is no need to power cycle the unit.

4. Power voltage setting

(1) SW5

1) Indoor control board
Dipswitch settings must be operated with the main power turned OFF.

Factory setting Set SW5 to 240V side when the power supply is 230 volts.

220V

(208V)

240V

(230V)

When the power supply is 208 volts, set SW5 to 220V side.

HWE09040 GB

- 29 -

[ VIII Troubleshooting ]

5. External static pressure

(1) SWA, SWC

1) Indoor control board

All models Factory

35Pa(0.14in.WG)

2

3
2

1

1

SWA SWC

50Pa(0.20in.WG)

2

3
2

1

1

SWA SWC

70Pa(0.28in.WG)

2

3
2

1

1

SWA SWC

100Pa(0.40in.WG)

2

3
2

1

1

SWA SWC

150Pa(0.60in.WG)

2

3
2

1

1

SWA SWC

setting

3
2
1

2

1

SWA SWC

Note:
Changes that are made to the dipswitches SWA and SWC immediately become effective regardless of the unit's operation
status (RUN/STOP) or the remote controller status (ON/OFF).

6. 1s and 10ths digits

(1) SW11, SW12 (Rotary switch)

The use of a network remote controller (PAR-F27MEA) requires address setting.

1) Indoor control board
Address settings must be made while the unit is stopped.

Factory setting

7. Connection No. setting

(1) SW14 (Rotary switch)

This switch is used when the unit connected to an R2 series of outdoor unit.

1) Indoor control board

Factory setting

Note:
Changes to the dipswitches SW11, SW12, SW14, and SW15 must be made while the unit is stopped and the remote controller
is OFF.

HWE09040 GB

- 30 -

[ IX Disassembly Procedure ]

IX Disassembly Procedure

[1] Disassembly Procedure

1. Control box

Exercise caution when removing heavy parts.

1. Removing the control box cover
(1) Remove the three fixing screws on the cover (A) to re-

move it.

(A)

Fig.1

Fig.2

HWE09040 GB

- 31 -

[ IX Disassembly Procedure ]

2. Thermistor (Intake air)

Exercise caution when removing heavy parts.

1. Remove the control box cover according to the procedure
in section [1].

2. Remove the thermistor.

(1) Pull out the thermistor holder (B) and thermistor (C) on

the control box.

(B), (C)

Fig.3

HWE09040 GB

- 32 -

[ IX Disassembly Procedure ]

3. Drainpan

Exercise caution when removing heavy parts.

1. Removing the filter and the bottom plate

(1) Push down the tab on the filter, and pull out the filter in

the direction of the arrow 1.

(2) Remove the fixing screws on the bottom plate (D), (E) to

remove it.

2. Removing the drainpan

(1) Pull out the drain pan in the direction of the arrow 2.

Note

Drain the water out of the drain pan before removing

it.

Fig.4

Fig.5

(D)

(E)

HWE09040 GB

- 33 -

[ IX Disassembly Procedure ]

4. Thermistor (Gas pipe) (Liquid pipe)

Exercise caution when removing heavy parts.

1. Remove the drain pan according to the procedure in sec­tion [1].

2. Removing the Heat exchanger cover

(1) Remove the four fixing screws on the heat exchanger cov-

er (F) to remove it.

3. Removing the thermistor

(1) Remove the thermistor (G) from the thermistor holder (H)

on the copper tube.

HEX

(F)

Fig.6

Thermistor size
Liquid pipe: ø8mm
Gas pipe: ø6mm

(G), (H)

Fig.7

HWE09040 GB

- 34 -

[ IX Disassembly Procedure ]

5. Fan and fan motor

Exercise caution when removing heavy parts.

1. Removing the filter and the bottom plate

(1) Push down the tab on the filter, and pull out the filter in the

direction of the arrow 1.

(2) Remove the fixing screws on the bottom plate (J) to re-

move it.

2. Removing the fan casing (bottom half)

(1) Squeeze the tabs on the fan casing to remove it in the di-

rection of arrow 2.

(J)

Fig.8

(a) Tab

(a)

3. Removing the motor cable

(1) Remove the motor cable threw the rubber bush.

4. Removing the fan motor and the Sirocco fan

(1) Remove the two motor fixing screws to remove the motor

and the Sirocco fan in the direction of arrow 3.

(2) Remove the four fan case fixing screws to take the top

half of the fan casing off.

Fig.9

Fig.10

HWE09040 GB

Fig.11

- 35 -

[ IX Disassembly Procedure ]

6. Heat exchanger

Exercise caution when removing heavy parts.

1. Remove the drain pan according to the procedure in section
[1].

2. Remove the heat exchanger cover according to the proce­dure in section [4] 2.

3. Removing the cover

(1) Remove the five fixing screws on the cover (K) to remove it.

4. Removing the Heat exchanger

(1) Remove the fixing screws on the heat exchanger (M) to re-

move it.

(K)

Fig.12

(K) Pipe support plate

Fig.13

(M)

HWE09040 GB

- 36 -

Jun. 2009 HWE009040 New publication, effective Jun. 2009

Specifications subject to change without notice