Mitsubishi PFFY-P08NRMU-E, PFFY-P18NRMU-E, PFFY-P12NRMU-E, PFFY-P06NRMU-E, PFFY-P06NEMU-E Technical & Service Manual

TECHNICAL & SERVICE MANUAL

Air-Conditioners For Building Application

<Indoor unit>

2014

Models

PFFY-P06NRMU-E,PFFY-P08NRMU-E
PFFY-P12NRMU-E,PFFY-P15NRMU-E
PFFY-P18NRMU-E,PFFY-P24NRMU-E
PFFY-P06NEMU-E,PFFY-P08NEMU-E
PFFY-P12NEMU-E,PFFY-P15NEMU-E
PFFY-P18NEMU-E,PFFY-P24NEMU-E

CONTENTS

SAFETY PRECAUTIONS ·························1

1. FEATURES ···········································3

2. PART NAMES AND FUNCTIONS········4

3. SPECIFICATION ···································6

4. OUTLINES AND DIMENSIONS············8

5. WIRING DIAGRAM ·····························10

6.

REFRIGERANT SYSTEM DIAGRAM

····11

7. TROUBLE SHOOTING ·······················12

8. DISASSEMBLY PROCEDURE···········

17

Floor Standing Type

Series PFFY

For use with the R410A & R22

Exposed type

Concealed type

1

SAFETY PRECAUTIONS

1. Before installation and electric work

• Keep the electric parts away from water (washing water etc.).

- It might result in electric shock, catching fire or smoke.

• To dispose of this product, consult your dealer.

• Do not use a leak detection additive.

s Before installing the unit, make sure you read all the

“Safety precautions”.

s The “Safety precautions” provide very important

points regarding safety. Make sure you follow them.

s This equipment may cause the adverse effect on the

same supply system.

s Please report to or take consent by the supply au-

thority before connection to the system.

Symbols used in the text

Warning:

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

•Never repair the unit. If the air conditioner must be repaired,
consult the dealer.

- If the unit is repaired improperly, water leakage, electric shock, or

fire may result.

• Do not touch the heat exchanger fins.

- Improper handling may result in injury.

• If refrigerant gas leaks during installation work, ventilate the
room.

- If the refrigerant gas comes into contact with a flame, poisonous

gases will be released.

• Install the air conditioner according to this manual.

- If the unit is installed improperly, water leakage, electric shock, or

fire may result.

•Have all electric work done by a licensed electrician according
to “Electric Facility Engineering Standard” and “Interior Wire
Regulations”and the instructions given in this manual and al­ways use a special circuit.

- If the power source capacity is inadequate or electric work is per-

formed improperly, electric shock and fire may result.

Caution:

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

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that impor tant instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts. (This

symbol is displayed on the main unit label.) <Color: Yellow>

:Beware of electric shock (This symbol is displayed on the main

unit label.) <Color: Yellow>

Warning:

Carefully read the labels affixed to the main unit.

Warning:

• Ask the dealer or an authorized technician to install the air con­ditioner.

- Improper installation by the user may result in water leakage, elec-

tric shock, or fire.

• Install the air unit at a place that can withstand its weight.

- Inadequate strength may cause the unit to fall down, resulting in

injuries.

• Use the specified cables for wiring. Make the connections se­curely so that the outside force of the cable is not applied to the
terminals.

- Inadequate connection and fastening may generate heat and cause

a fire.

• Prepare for typhoons and other strong winds and earthquakes
and install the unit at the specified place.

- Improper installation may cause the unit to topple and result in

injury.

•Always use an air cleaner, humidifier, electric heater, and other
accessories specified by Mitsubishi Electric.

- Ask an authorized technician to install the accessories. Improper

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

• Securely install the cover of control box and the panel.

- If the cover and panel are not installed properly,dust or water may
enter the outdoor unit and fire or electric shock may result.

• When installing and moving the air conditioner to another site,
do not charge the it with a refrigerant different from the refrig­erant specified on the unit.

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

the refrigerant cycle may malfunction and the unit may be dam­aged.

• If the air conditioner is installed in a small room, measures
must be taken to prevent the refrigerant concentration from
exceeding the safety limit even if the refrigerant should leak.

- Consult the dealer regarding the appropriate measures to pre-

vent the safety limit from being exceeded. Should the refrigerant
leak and cause the safety limit to be exceeded, hazards due to
lack of oxygen in the room could result.

• When moving and reinstalling the air conditioner, consult the
dealer or an authorized technician.

- If the air conditioner is installed improperly, water leakage, elec-

tric shock, or fire may result.

• After completing installation work, make sure that refrigerant
gas is not leaking.

- If the refrigerant gas leaks and is exposed to a fan heater, stove,

oven, or other heat source, it may generate noxious gases.

• Do not reconstruct or change the settings of the protection
devices.

- If the pressure switch, thermal switch, or other protection device

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

2

2. Precautions for devices that use

Caution:

• Do not use the existing refrigerant piping.

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

• Use refrigerant piping made of C1220 (Cu-DHP) phosphorus
deoxidized copper as specified in the *JIS H3300 “Copper and
copper alloy seamless pipes and tubes”. In addition, be sure
that the inner and outer surfaces of the pipes are clean and
free of hazardous sulphur, oxides, dust/dirt, shaving particles,
oils, moisture, or any other contaminant.

- Contaminants on the inside of the refrigerant piping may cause

the refrigerant residual oil to deteriorate.

*JIS: Japanese Industrial Standard

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

- If dust, dirt, or water enters the refrigerant cycle, deterioration of

the oil and compressor trouble may result.

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

- The refrigerator oil will degrade if it is mixed with a large amount of

mineral oil.

• Use liquid refrigerant to fill the system.

- If gas refrigerant is used to seal the system, the composition of

the refrigerant in the cylinder will change and performance may
drop.

• Do not use a refrig

- If another refrigerant (R22, etc.) is used, the chlorine in the refrig-

erant may cause the refrigerator oil to deteriorate.

• Use a vacuum pump with a reverse flow check valve.

- The vacuum pump oil may flow back into the refrigerant cycle and

cause the refrigerator oil to deteriorate.

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

- If the conventional refrigerant and refrigerator oil are mixed in the

• Do not use a charging cylinder.

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

• Be especially careful when managing the tools.

- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant

may deteriorate.

R410A refrigerant

erant other than R410A.

R410A , the refrigerant may deteriorated.

- If deteriorate.water is mixed in the R410A , the refrigerator oil may

-Since R410A does not contain any chlorine, gas leak detectors
for conventional refrigerants will not react to it.

Warning:

Note the following when building a heater in the air
conditioning system.

- Leave enough space between units for proper ventilation so that
the indoor unit temperature does not exceed 40˚C when
windless.

- Keep the heater clean, and take appropriate measures so that
the indoor unit does not suck in the dust particles that
accumulate on the heater.

- Use the optional heater cable (PAC-YU24HT) to perform an
interlocked operation with indoor units.

- Do not build a heater inside the indoor unit.

•

Recommended circuit

FS1

FS2
FS1

FS2

R

S

R

S

CN24

H2

88H

H1

88H

26H

88H

Wiring diagram

1-phase power
supply

208V, 230V/60Hz

Control board

FS1, 2 ----- Thermal fuse

H1, H2 ----- Heater

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

thermostat

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

3

PFFY-P06NEMU-E,PFFY-P06NRMU-E
PFFY-P08NEMU-E,PFFY-P08NRMU-E
PFFY-P12NEMU-E,PFFY-P12NRMU-E
PFFY-P15NEMU-E,PFFY-P15NRMU-E
PFFY-P18NEMU-E,PFFY-P18NRMU-E
PFFY-P24NEMU-E,PFFY-P24NRMU-E

1.8 / 2.0

2.3 / 2.6

3.5 / 4.0

4.4 / 5.0

5.3 / 5.9

7.0 / 7.9

Floor Standing Type

Series PFFY

Models

Cooling capacity/Heating capacity

kW

6000 / 6700

8000 / 9000
12000 / 13500
15000 / 17000
18000 / 20000
24000 / 27000

BTU / h

FEATURES1

Concealed type

Exposed type

4

●

Indoor (Main) Unit

● Remote controller

[Operation buttons]

[PAR-21MAA]

● Once the controls are set, the same operation mode can

be repeated by simply pressing the ON/OFF button.

1 [Set Temperature] Button
2 [Timer Menu] Button

[Monitor/Set] Button

3 [Mode] Button

[Return] Button

4 [Timer On/Off] Button

[Set Day] Button

7 [Airflow Up/Down] Button

[Ventilation] Button
[Operation] Button

5 [Louver] Button

[Operation] Button

6 [Fan Speed] Button

[Check/Clear] Button

0 [Test run] Button
A

8

9

[Filter] Button
[ ] Button

B
C

D

[ON/OFF] Button
Position of built-in room temperature

[Set Time] Button

Ne•ver expose the remote controller to direct sunlight. Doing so can result in the erroneous measure­ment of room temperature.

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

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

1

2

3

4

D 568 9

0

C

A

B
7

PART NAMES AND FUNCTIONS2

Concealed type

Exposed type

Air outlet

Air outlet

Air inlet

Air inlet

5

[Display]

+

+

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

CHECK

CHECK MODE

FILTER

TEST RUN
FUNCTION

1Hr.

NOT AVAILABLE

STAND BY
DEFROST

TEMP.

A

B

C

E

P

M
F

K

D

OLGNIHJQ

A

Current time/Timer

B

Centralized control

C

Timer OFF

D

Timer indicator

E

Operation mode: COOL, DRY, AUTO, FAN, HEAT

F

“Locked” indicator

G
H

Set temperature

I

Power ON

J

Louver

K
L

Ventilation

M
N
O
P

Filter sign
Set effective for 1 hr.
Sensor position
Room temperature
Airflow
Fan speed

6

PFFY-P-NEMU-E

PFFY-P-NRMU-E

Notes: *1 Cooling/Heating capacity indicates the maximum value at operation under the following condition.

Cooling: Indoor: 26.7

˚C [80 ˚F] DB/19.4 ˚C [67 ˚F] WB Outdoor: 35 ˚C [95 ˚ F] DB

Heating: Indoor: 21.1

˚C [70 ˚F] DB Outdoor: 8.3 ˚C [47 ˚F] DB/6.1 ˚C [43 ˚F] WB

*2 The operating noise is the data that was obtained in an anechoic room.

Model

Item

PFFY-

P06NEMU-E

PFFY-

P08NEMU-E

PFFY-

P12NEMU-E

PFFY-

P15NEMU-E

PFFY-

P18NEMU-E

PFFY-

P24NEMU-E

Power sourse 208/230V, 60Hz

Capacity
*1

Cooling

kW 1.8

BTU/h 6000 8000 12000 15000 18000 24000

Heating

kW 2.

2.3

2.6

3.5

4.0

4.4

5.0

5.3

5.9

7.0

7.90

BTU/h 6700 9000 13500 17000 20000 27000

Dimension

Height

mm 630

in 24-13/16

Width

mm 1050 1170 1410

in 41-11/32 46-3/32 55-17/32

Depth

mm 220

in 8-11/16

Net weight

kg 23 23 25 26 30 32

lb 51 51 56 58 67 71

FAN

Airflow rate
(Low-High)

m

3

/min 5.5-6.5 5.5-6.5 7.0-9.0 8.5-11.0 10.0-13.0 10.0-14.0

cfm 194-229 194-229 247-317 300-388 353-459 353-494
External static
pressure

Pa

208V - - - - - -

230V - - - - - ­Noise level
(Low-High) *2

dB(A)

208V 36-41 36-41 37-41 38-43 38-43 40-46

230V 36-41 36-41 37-41 38-43 38-43 40-46
Filter Standard filter

Model

Item

PFFY-

P06NRMU-E

PFFY-

P08NRMU-E

PFFY-

P12NRMU-E

PFFY-

P15NRMU-E

PFFY-

P18NRMU-E

PFFY-

P24NRMU-E

Power sourse 208/230V, 60Hz

Capacity
*1

Cooling

kW 1.8

BTU/h 6000 8000 12000 15000 18000 24000

Heating

kW 2.

2.3

2.6

3.5

4.0

4.4

5.0

5.3

5.9

7.0

7.90

BTU/h 6700 9000 13500 17000 20000 27000

Dimension

Height

mm 639

in 25-3/16

Width

mm 886 10061246

in 34-29/32 39-5/8 49-1/16

Depth

mm 220

in 8-11/16

Net weight

kg 19 19 20 21 25 27

lb 41 41 45 47 56 60

FAN

Airflow rate
(Low-High)

m

3

/min 5.5-6.5 5.5-6.5 7.0-9.0 8.5-11.0 10.0-13.0 10.0-14.0

cfm 194-229 194-229 247-317 300-388 353-459 353-494
External static
pressure

Pa

208V - - - - - -

230V - - - - - ­Noise level
(Low-High) *2

dB(A)

208V 36-41 36-41 37-41 38-43 38-43 40-46

230V 36-41 36-41 37-41 38-43 38-43 40-46
Filter Standard filter

SPECIFICATION3

3-1. Specification

7

LEV

C1

1.5µF X 440V

2.5µF
X

440V

2.0µF
X

440V

MF1,2

PFFY-P06
NEMU-E
NRMU-E

Model

Parts

name

Tr anrsformer T (Primary) 60Hz 208-230V (Secondary) (23.5V 0.9A)

TH21

Resistance 0˚C[32˚F]/15kΩ,10˚C[50˚F]/9.6kΩ,20˚C[68˚F]/6.3kΩ,25˚C[77˚F]/5.4kΩ,

30˚C[86˚F]/4.3kΩ,40˚C[104˚F]/3.0kΩ

Resistance 0˚C[32˚F]/15kΩ,10˚C[50˚F]/9.6kΩ,20˚C[68˚F]/6.3kΩ,25˚C[77˚F]/5.4kΩ,

30˚C[86˚F]/4.3kΩ,40˚C[104˚F]/3.0kΩ

Resistance 0˚C[32˚F]/15kΩ,10˚C[50˚F]/9.6kΩ,20˚C[68˚F]/6.3kΩ,25˚C[77˚F]/5.4kΩ,

30˚C[86˚F]/4.3kΩ,40˚C[104˚F]/3.0kΩ

TH22

Gas pipe
thermistor

FUSE 250V 6.3A

TB2 (L1, L2, G) 330V 30A

TB5
TB15

(1,2),(M1,M2,S) 300V 10A

Fuse

(Indoor con-

troller board)

Power supply
terminal bed

Tr ansmission
terminal bed

OFF 130˚C±5˚C

ON 90˚C±20˚C

Room
temperature
thermistor

Fan motor

(with Inner-

thermostat)

4-pole

OUTPUT 15W

CU-0206B-A

4-pole

OUTPUT 15W

CU-0206B-A

4-pole

OUTPUT 18W

CU-0207B-A

4-pole

OUTPUT 30W

CU-0303B-A

4-pole

OUTPUT 35W

CRC4415AB

4-pole

OUTPUT 50W

CU-0507B-A

Symbol

DC12V Stepping motor drive port

dimension

ø3.2 (0~2000pulse)

TH23

Inner­thermostat/

thermal fuse

(Fan motor)

Liquid pipe
thermistor

Fan motor
capacitor

Linear
expansion valve

PFFY-P08
NEMU-E
NRMU-E

PFFY-P12
NEMU-E
NRMU-E

PFFY-P15
NEMU-E
NRMU-E

PFFY-P18
NEMU-E
NRMU-E

PFFY-P24
NEMU-E
NRMU-E

152˚C ˚C

+5

0

[306˚F ˚F]

+41
+32

[306˚F ˚F]

+41
+32

FUSE

CUT OFF

[266˚F±41˚F]
[194˚F±68˚F]

3-2. Electrical parts specification