Mitsubishi Electric PVFY-P12, PVFY-P36, PVFY-P48, PVFY-P54NAMU-E1, PVFY-P18 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

2015

Air-Conditioners

PVFY-P12, 18, 24, 30, 36, 48, 54NAMU-E1
Multi-Position Air Handler

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

Model name
<Indoor unit>

Model name
<Indoor unit>

Series PVA

2015

Contents

1 SAFETY PRECAUTION ................................................................................................................................................... 2

2 FEATURES ......................................................................................................................................................................5

3 PART NAMES AND FUNCTIONS ....................................................................................................................................6

4 SPECIFICATION ..............................................................................................................................................................9

5 OUTLINES & DIMENSIONS .......................................................................................................................................... 13

6 WIRING DIAGRAM ........................................................................................................................................................ 15

7 REFRIGERANT SYSTEM DIAGRAM ............................................................................................................................ 16

8 MICROPROCESSOR CONTROL ..................................................................................................................................17

9 TROUBLESHOOTING ................................................................................................................................................... 29

10 DISASSEMBLY PROCEDURE ......................................................................................................................................39

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

2

SAFETY PRECAUTION1

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

Do not use refrigerant other than the type indicated in the
manuals provided with the unit and on the nameplate.

Doing so may cause the unit or pipes to burst, or result in
explosion or fire during use, during repair, or at the time of
disposal of the unit.
It may also be in violation of applicable laws.
MITSUBISHI ELECTRIC CORPORATION cannot be held
responsible for malfunctions or accidents resulting from the
use of the wrong type of refrigerant.

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.

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

3

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.

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.

4

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

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.

5

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

FEATURES2

Model

Cooling capacity/Heating capacity

Btu/h kW

PVFY-P12NAMU-E1 12000/13500 3.5/4.0

PVFY-P18NAMU-E1 18000/20000 5.3/5.9

PVFY-P24NAMU-E1 24000/27000 7.0/7.9

PVFY-P30NAMU-E1 30000/34000 8.8/10.0

PVFY-P36NAMU-E1 36000/40000 10.6/11.7

PVFY-P48NAMU-E1 48000/54000 14.1/15.8

PVFY-P54NAMU-E1 54000/60000 15.8/17.6

6

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

PART NAMES AND FUNCTIONS3

1. Indoor Unit

Air
inlet

Air
outlet

(1)Vertical

(2)Horizontal Right

Air
inlet

Air
outlet

Air inlet

Air outlet

(3)Horizontal left

(4)Down flow

7

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

1. Remote Controller

[PAC-YT53CRAU]

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

(1) Remote Controller Buttons

.

Backlit LCD

TEMP. button

MODE button

ON/OFF lamp

ON/OFF button

FAN button

VANE button

The lamp will light up in green when
turned on, and blink during startup
and when an error occurs.

Pressing this button starts and
stops the operation.

• 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 measurement of room temperature.

• To set the functions that are not available on this controller (PAC-YT53CRAU), use MA remote controller or

the centralized controller.

8

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

*2 icon

For M-Series and P-Series, when an error occurs, power indicator will blink, and refrigerant address (two digits),
error code (two digits), and unit No. will blink.
For City Multi, when an error occurs, power indicator will blink, and unit address (three digits) and error code (four
digits) will blink.
Check the error status, stop the operation, and consult your dealer.

When only error code blinks, air conditioning units stay in operation, but an error may have occurred.
Check the error code, and consult your dealer.

Room

Set to

AUTO COOLHEATFAN
DRYING VENTI. SETBACK

Unit address
blinks.

Error code
blinks.

Room

Set to

AUTO COOL HEATFAN
DRYING VENTI. SETBACK

Error code
blinks.

icon appears while the unit is operated in the

energy-save mode

* All icons are displayed for explanation.

icon appears when Operation lock setting is

effective.

icon appears when indoor unit functions are set up.

(Refer to the Installation Manual.)

Fan speed icon
Vane icon

icon appears when the power is on.

Indoor temperature

Operation modes

CENTRAL icon *1

CHECK icon *2

Preset temperature *3

*1 icon

Appears when one of the following local operations is prohibited: ON/OFF; operation mode; preset temperature;
fan speed; vane.

CENTRAL

*3 Preset temperature

* Centigrade or Fahrenheit is selectable. Refer to the Installation Manual for details.

In COOL, DRYING, HEAT, or
AUTO (single set point) modes

In AUTO (dual set point) or

SETBACK modes

Room

Set to

AUTO COOL HEATFAN
DRYING VENTI. SETBACK

Preset
temperature

Room

Set to

AUTO COOLHEATFAN

DRYING VENTI. SETBACK

Heating preset
temperature

Cooling preset
temperature

(2) Remote Controller Display

9

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

1. Specifications

Model PVFY-P12NAMU-E1 PVFY-P18NAMU-E1 PVFY-P24NAMU-E1

Power source 1-phase 208/230V 60Hz

Cooling capacity
(Nominal)

*1 Btu / h 12,000 18,000 24,000

*1 kW 3.5 5.3 7.0

Power input kW 0.08 0.13 0.18

Current input A 0.80/0.70 1.20/1.10 1.60/1.40

Heating capacity *2 Btu / h 13,500 20,000 27,000

(Nominal) *2 kW 4.0 5.9 7.9

Power input kW 0.08 0.13 0.18

Current input A 0.80/0.70 1.20/1.10 1.60/1.40

External finish Galvanized steel cabinet -Powder coated slate gray

External dimension

H x W x D

In. 50-1/4x17x21-5/8

mm 1275 x 432 x 548

Net weight Lbs. (kg) 113(51)

Heat exchanger Cross fin (Aluminium fin and copper tube)

FAN

Type x Quantity Sirocco fan x 1

External
static press.

In.WG <0.30>-0.50-<0.80>

Pa <75>-125-<200>

Motor type DC motor

Motor output kW 0.121

Driving mechanism Direct-driven by motor

Airflow rate
(Low-Mid-High)

CFM 280-340-400 410-497-585 515-625-735

m³ / min 7.9-9.6-11.3 11.6-14.1-16.6 14.6-17.7-20.8

L / s 132-160-188 193-235-277 243-295-347

Sound pressure level
(Low-Mid-High)
(measured in anechoic room)

dB <A> 27-31-35 28-32-36 30-34-38

Insulation material EPS, Polyethylene foam, Urethane foam, Polyester

Air filter PP honeycomb fabric

Protection device Fuse

Refrigerant control device LEV

Connectable outdoor unit R410A CITY MULTI

Diameter of
refrigerant

pipe
(O.D.)

Liquid

(R410A)

In. (mm) 1/4 (6.35) Brazed 1/4 (6.35) Brazed 3/8 (9.52) Brazed

Gas

(R410A)

In. (mm) 1/2 (12.7) Brazed 1/2 (12.7) Brazed 5/8 (15.88) Brazed

Diameter of drain pipe In. (mm) 3/4 (19.05) FPT

Drawing External PA94C593

Wiring PA94C598

Refrigerant cycle -

Standard
attachment

Document Installation Manual, Instruction Book

Accessory Tie band, Plastic tube, Drain pan seal

Optional
parts

External heater adapter CN24RELAY-KIT-CM3

Remark Installation

Details on foundation work, duct work, insulation work, electrical
wiring, power source switch, and other items shall be referred to
the Installation Manual.
Due to continuing improvement, above specifications may be
subject to change without notice.

SPECIFICATION4

10

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

Model PVFY-P30NAMU-E1 PVFY-P36NAMU-E1

Power source 1-phase 208/230V 60Hz

Cooling capacity
(Nominal)

*1 Btu / h 30,000 36,000

*1 kW 8.8 10.6

Power input kW 0.21 0.34

Current input A 2.00/1.70 3.00/2.70

Heating capacity *2 Btu / h 34,000 40,000

(Nominal) *2 kW 10.0 11.7

Power input kW 0.21 0.34

Current input A 2.00/1.70 3.00/2.70

External finish Galvanized steel cabinet -Powder coated slate gray

External dimension

H x W x D

In. 54-1/4x21x21-5/8

mm 1378 x 534 x 548

Net weight Lbs. (kg) 141(64)

Heat exchanger Cross fin (Aluminium fin and copper tube)

FAN

Type x Quantity Sirocco fan x 1

External
static press.

in.WG <0.30>-0.50-<0.80>

Pa <75>-125-<200>

Motor type DC motor

Motor output kW 0.244

Driving mechanism Direct-driven by motor

Airflow rate
(Low-Mid-High)

CFM 613-744-875 767-931-1095

m³ / min 17.3-21.1-24.8 21.7-26.4-31.0

L / s 290-352-413 362-440-517

Sound pressure level
(Low-Mid-High)
(measured in anechoic room)

dB <A> 32-36-40 35-39-43

Insulation material EPS, Polyethylene foam, Urethane foam, Polyester

Air filter PP honeycomb fabric

Protection device Fuse

Refrigerant control device LEV

Connectable outdoor unit R410A CITY MULTI

Diameter of
refrigerant

pipe
(O.D.)

Liquid

(R410A)

In. (mm) 3/8 (9.52) Brazed

Gas

(R410A)

In. (mm) 5/8 (15.88) Brazed

Diameter of drain pipe In. (mm) 3/4 (19.05) FPT

Drawing External PA94C593

Wiring PA94C598

Refrigerant cycle -

Standard
attachment

Document Installation Manual, Instruction Book

Accessory Tie band, Plastic tube, Drain pan seal

Optional
parts

External heater adapter CN24RELAY-KIT-CM3

Remark Installation

Details on foundation work, duct work, insulation work, electrical
wiring, power source switch, and other items shall be referred to
the Installation Manual.
Due to continuing improvement, above specifications may be
subject to change without notice.

11

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

Model PVFY-P48NAMU-E1 PVFY-P54NAMU-E1

Power source 1-phase 208/230V 60Hz

Cooling capacity
(Nominal)

*1 Btu / h 48,000 54,000

*1 kW 14.1 15.8

Power input kW 0.42 0.48

Current input A 3.50/3.30 3.90/3.70

Heating capacity *2 Btu / h 54,000 60,000

(Nominal) *2 kW 15.8 17.6

Power input kW 0.42 0.48

Current input A 3.50/3.30 3.90/3.70

External finish Galvanized steel cabinet -Powder coated slate gray

External dimension

H x W x D

In. 59-1/2x25x21-5/8

mm 1511 x 635 x 548

Net weight Lbs. (kg) 172(78)

Heat exchanger Cross fin (Aluminium fin and copper tube)

FAN

Type x Quantity Sirocco fan x 1

External
static press.

In.WG <0.30>-0.50-<0.80>

Pa <75>-125-<200>

Motor type DC motor

Motor output kW 0.430

Driving mechanism Direct-driven by motor

Airflow rate
(Low-Mid-High)

CFM 980-1190-1400 1040-1262-1485

m³ / min 27.7-33.7-39.6 29.4-35.7-42.0

L / s 463-562-660 492-595-702

Sound pressure level
(Low-Mid-High)
(measured in anechoic room)

dB <A> 35-39-43 36-40-44

Insulation material EPS, Polyethylene foam, Urethane foam, Polyester

Air filter PP honeycomb fabric

Protection device Fuse

Refrigerant control device LEV

Connectable outdoor unit R410A CITY MULTI

Diameter of
refrigerant

pipe
(O.D.)

Liquid

(R410A)

In. (mm) 3/8 (9.52) Brazed

Gas

(R410A)

In. (mm) 5/8 (15.88) Brazed

Diameter of drain pipe In. (mm) 3/4 (19.05) FPT

Drawing External PA94C593

Wiring PA94C598

Refrigerant cycle -

Standard
attachment

Document Installation Manual, Instruction Book

Accessory Tie band, Plastic tube, Drain pan seal

Optional
parts

External heater adapter CN24RELAY-KIT-CM3

Remark Installation

Details on foundation work, duct work, insulation work, electrical
wiring, power source switch, and other items shall be referred to
the Installation Manual.
Due to continuing improvement, above specifications may be
subject to change without notice.

12

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

Notes

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

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

(26.7° C D.B. / 19.4° C W.B.) (21.1° C D.B.) Btu/h = kW x 3,412

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

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

Pipe length : 25 ft. (7.6 m) 25 ft. (7.6 m) *Above specification

data is subject to
rounding variation.

Level difference : 0 ft. (0 m) 0 ft. (0 m)

*The external static pressure is set to 0.50in. WG(125Pa) at factory shipment.

*Due to continuing improvement, above specification may be subject to change without notice.

Component Symbol PVFY-P12NAMU-E1 PVFY-P18NAMU-E1 PVFY-P24NAMU-E1
Room temperature
thermistor

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

Liquid pipe thermistor TH22 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Gas pipe thermistor TH23 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Fuse FUSE 250V 6.3A

Fan motor

8-pole, Output 121W

SIC-71FW-D8121-3

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

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

Transmission terminal
block

TB5

TB15

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

Component Symbol PVFY-P30NAMU-E1 PVFY-P36NAMU-E1
Room temperature
thermistor

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

Liquid pipe thermistor TH22 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Gas pipe thermistor TH23 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Fuse FUSE 250V 6.3A

Fan motor

8-pole, Output 244W

SIC-81FW-D8244-1

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

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

Transmission terminal
block

TB5

TB15

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

Component Symbol PVFY-P48NAMU-E1 PVFY-P54NAMU-E1
Room temperature
thermistor

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

Liquid pipe thermistor TH22 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Gas pipe thermistor TH23 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Fuse FUSE 250V 6.3A

Fan motor

8-pole, Output 430W

M-MW-430-A-1

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

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

Transmission terminal
block

TB5

TB15

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

2. Electrical component specifications

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

13

OUTLINES & DIMENSIONS5

INDOOR UNIT

PVFY-P12,18, 24, 30, 36, 48, 54NAMU-E1

Unit : mm(in.)

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

14

609.6(24)

Width of Unit

609.6(24)

Length of Unit

Clearance Area

Vertical Installation

Horizontal Installation

Unit : mm(in.)

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

15

6 WIRING DIAGRAM

PVFY-P12,18, 24, 30, 36, 48, 54NAMU-E1

U

U

INSIDE SECTION OF CONTROL BOX

SYMBOL

EXPLANATION

SYMBOL

SYMBOL SYMBOL

CN24-2

TB5

TB2

I.B.

CN32

SW1(I.B.)

SW2(I.B.)

SW3(I.B.)

SW4(I.B.)

SW5(I.B.)

SW11(I.B.)

SW12(I.B.)

SW14(I.B.)

SWA(I.B.)

SWC(I.B.)

SWE(I.B.)

LED1

LED2

CN41

CN51

CN52

CN90

CN105

CN2A

CNEC2

CNF

TH21

TH22

TH23

TB15

CN25

F01

ZNR01,02

DSA

X10

CN24-1

P.B.

CN22

NAME NAME NAME

Indoor controller board

Power supply board

Connector (Humidity output

)

Power source terminal bloc

k

Transmission terminal block

Transmission terminal block

Connector (Fan control)

Connector (Heater control 1st)

Fuse AC250V 6.3A

Varistor

Arrester

Aux. relay

Connector (Heater control 2nd)

Connector (0-10V Analog input)

Connector (IT terminal)

Connector (HA terminal-A)

Thermistor (inlet air temp.detection)

Connector (Centrally control)

Connector (Remote switch)

Connector (Wireless)

Thermistor (piping temp.detection/liquid)

Thermistor (piping temp.detection/gas)

Connector (FAN indication)

Connector (Humidity input)

Connector (Remote indication)

LED (Power supply)

LED (Remote controller supply)

Switch (connection No.set)

Switch (for static pressure selection)

Switch (for static pressure selection)

Connector (emergency operation)

Switch (for mode selection)

Switch (for capacity code)

Switch (for mode selection)

Switch (for model selection)

Switch (for mode selection)

Switch (1st digit address set)

Switch (10ths digit address set)

NOTE:1.Symbols used in wiring diagram above are,

:Connector

:Terminal

(Heavy dotted line):Field wiring

2.Use copper supply wires.

UTILISER DES FILS D'ALIMENTATION EN CUIVRE.

M

MS

3~

4567

1

1232153214 4

LEV

FAN MOTOR

DC280-340V

X10

CNXC1 CNMFCNXA1

TH23

TH22

t

°

t

°

CNXB1

CNEC1

CNEC2

(RED)

TH21

t

°

5321476

RECTIFIER

CIRCUIT

(BLUE)

1

3

21653

4

CN32

CN22

SWE

CN90

SW1

SWA

SW4

SW11

SW12

SW14

SWC

SW5

(GREEN)

LED2

OFF

ON

CN24-2CN24-1

SW3

SW2

CN3A

(BLUE)

(BLUE)(YELLOW)

CN60

CN7V

CN25

2

1

6

534

7

3

213

4

4

1

2

1

431

2

2

1

542

3

CN52

CN20

CN41

CN4F

CN51

CNXB2

CNXC2

(RED)

CN44

(GREEN)

CNXA2

(BLUE)

CNF

(GREEN)

2

1

351

I.B.

CN105

CN2M

F01

DSA

ZNR01

ZNR02

(BLUE)

LED1

CN2A

(BLACK)

(RED)

P. B.

(RED)

CND

TB2

POWER SUPPLY

AC208/230V

S

(SHIELD)

M2

M1

TB5

L2GL1

2

1

TB15

TO OUTDOOR UNIT

BC CONTROLLER

REMOTE CONTROLLER

TO MA REMOTE

CONTROLLER

60Hz

16

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

7 REFRIGERANT SYSTEM DIAGRAM

PVFY-P12,18, 24, 30, 36, 48, 54NAMU-E1

(H)

(I)

(F)

(E)(E)

(C)

(G)

(A)

(D)

(B)

(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 PVFY-P12, 18NAMU-E1 PVFY-P24, 30, 36, 48, 54NAMU-E1
Gas pipe ø12.7 [1/2] ø15.88 [5/8]

Liquid pipe ø6.35 [1/4] ø9.52 [3/8]

17

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

1. Cool operation

.

1.) Thermo-regulating function

(1) Thermo-regulating function (Function to prevent restarting for 3 minutes)
When indoor units are connected to the PUHY/PURY/PQHY/PQRY series of outdoor units.

• Room temperature ≥ desired temperature + 0.9° F ···Thermo ON

• Room temperature < desired temperature - 0.9° F···Thermo OFF

When indoor units are connected to the PUMY series of outdoor units.

• Room temperature ≥ desired temperature + 0.9° F ···Thermo ON

• Room temperature < desired temperature - 0.9° F···Thermo OFF

(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 thermo-regulating, 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

8 MICROPROCESSOR CONTROL

<How to operate>

1) Press POWER

ON/OFF

button.

2) Press the operation

MODE

button to display COOL.

3) Press the

TEMP.

button to set the desired temperature.

Note:

The set temperature changes 2° F when the

TEMP.

button is

pressed one time. Cooling 67 to 87° F.

18

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

2. Dry operation

.

1.) Thermo regulating 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).

• Room temperature ≥ desired temperature + 2° F ···Dry Thermo ON

• Room temperature < desired temperature ···Dry Thermo OFF

Room temperature

3 min. passed since starting operation

Dry thermo

ON time (min)

Dry thermo

OFF time (min)

Thermo regulating

signal

Room temperature

(T1)

Over 64°F

ON

T1 ≥ 83°F 9 3

83°F > T1 ≥ 79°F 7 3

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]

OFF

Room temp. ≥ 64°F Stop

Room temp. < 64°F [Low]

<How to operate>

1) Press POWER

ON/OFF

button.

2) Press the operation

MODE

button to display COOL.

3) Press the

TEMP.

button to set the desired temperature.

Note:

The set temperature changes 2° F when the

TEMP.

button is

pressed one time. Cooling 67 to 87° F.

19

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

3. Fan operation

.

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].

<How to operate>

1) Press POWER

ON/OFF

button.

2) Press the operation

MODE

button to display FAN.

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

20

4. Heat operation

.

1.) Thermo-regulating function

(1) Thermo-regulating function (Function to prevent restarting for 3 minutes)
When indoor units are connected to the PUHY/PURY/PQHY/PQRY series of outdoor units.

• Room temperature < desired temperature - 0.9° F ···Thermo ON

• Room temperature ≥ desired temperature + 0.9° F···Thermo OFF

When indoor units are connected to the PUMY series of outdoor units.

• Room temperature < desired temperature - 0.9° F ···Thermo ON

• Room temperature ≥ desired temperature + 0.9° F···Thermo OFF

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 thermo-regulating)

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.) 6.) When starting the HEAT operation

1.) 7.) When the thermo-regulating function changes from OFF to ON.

1.) 8.) When release the HEAT defrosting operation

<How to operate>

1.) Press POWER

ON/OFF

button.

2.) Press the operation

MODE

button to display COOL.

3.) Press the

TEMP.

button to set the desired temperature.

Note:

The set temperature changes 2° F when the

TEMP.

button is

pressed one time. Heating 63 to 83° F.

CAB

[Extra Low]

[Low]

Set fan speed by the remote controller

Hot adjust mode

*1

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 The fan may stop, depending on the operation status of the indoor units or on the unit settings.

21

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

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

TEMP.

button to set the desired

temperature.

Note:

The set temperature changes 2° F when the

TEMP.

button

is pressed one time. Heating 63 to 83° F.

(3) Preheating exclusion mode

• When the condition changes the auxiliary heater ON to OFF (thermo-regulating or operation stop, etc.), the

indoor fan operates in [Low] mode for 1 minute.

Note:

This control is same for the model without auxiliary heater.

(4) Thermo OFF mode

• When the thermo-regulating function changes to OFF, the indoor fan operates in [Extra low].

(5) Heat defrosting mode

• The indoor fan stops.

1.) Initial value of operation mode

(1) HEAT mode for room temperature < Desired temperature
(2) COOL mode for room temperature ≥ Desired temperature

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

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.

22

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

6. Heater control

1. Control specifications and DIP S/W setting

• Table 1 shows the function settings the field-installed heater. Select the desired pattern in the table below, and

set the DIP SW on the outdoor and indoor units as shown in Table 1.

Table 1.

Outdoor unit

setting

Condition of outdoor unit

PVFY-NAMU-E

DIP S/W

(Indoor unit)*1

Heater control

SW3-2 SW3-4 Pattern Defrost Error

DIP S/W OFF
In the case of:

TGMU:

S/W5-2 OFF
THMU/YHMU/
TJMU/YJMU:
S/W5-10 OFF
TKMU/YKMU:

SW4: 932
OFF

TLMU/YLMU:

SW4: 932
OFF
PUMY:

S/W4-4 OFF

N / A

OFF - Heater not Available

ON OFF

Heater

Available

OFF OFF

ON ON

Heater

Available

ON ON*2

DIP S/W ON
In the case of:

TGMU:

S/W5-2 ON
THMU/YHMU/
TJMU/YJMU:
S/W5-10 ON
TKMU/YKMU:

SW4: 932 ON

TLMU/YLMU:

SW4: 932 ON
PUMY:

S/W4-4 ON

Normal drive

Defrost drive

H/P drive

H/P stop

Condition of O/U

㻼㼍㼞㼍㼙㼑㼠㼑㼞㼟㻌a/b/c/d are set by㻌
maintenance tool.

abcd

Outdoor temp.

Normal
drive

OFF - Heater not Available

ON OFF

Heater

Available

OFF OFF

ON ON

Heater

Available

ON ON*2

Defrost
drive
H/P
drive
H/P

stop

OFF - Heater not Available

ON OFF

Heater

Available

OFF OFF

ON ON

Heater

Available

ON ON*2

*1 Default settings: SW3-2 OFF, SW3-4 OFF
*2 Heater will not operate during all error modes. Heater will only operate during a communication error between
indoor unit and outdoor unit.

23

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

• Table 2 shows how the field-installed heater is controlled.

Table. 2 [Heater Control Table]

Mode Change

Condition

(To -TRA) >

2.7 ° F

[1.5 °C]

AND

TRA has not

increased by

0.9 °F [0.5°

C] in X min

EH1 ON for

> 5 min

AND

(To -TRA) >

2.7 ° F

[1.5 ° C]

AND

TRA has not

increased by 0.9 ° F

[0.5° C] in 5 min

(To -TRA) <

0.9 °F

[0.5° C]

EH1 ON ○ AND ○

EH2 ON ○ AND ○ AND ○

EH1 OFF ○

EH2 OFF ○

KEY

• EH1: Electric Heater 1

• EH2: Electric Heater 2

• To: Set point temperature

• TRA: Return Air temperature

• X: Time delay (Selectable. Default is 20 min. Selectable to 10, 15, or 25 min)

• Table 3 shows how the time delay is selected

Table. 3 [Time Delay Selection Table]

Function Setting

*1

Action

*3

108-1 Set Time Delay to 10 minutes

108-2 Set Time Delay to 15 minutes

108-3 Set Time Delay to 20 minutes

*2

108-4 Set Time Delay to 25 minutes

*1

Time delay can only be selected with MA controller. If use of a non-MA controller is desired, the time delay must first be

selected with the MA controller. Then the non-MA controller can be attached and used.

*2

The default time delay setting is 20 minutes.

*3 Time delays are approximate.

24

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

• Chart 1 and Table 4 show an example of heater operation.

Chart 1 [Heater Operation Example]

EH2

ON

OFF

To - 0.9 °F [0.5 °C]

To - 2.7 °F [1.5 °C]

ON

OFF

EH1

T

o

T

RA

X min

X min

X min

①

②

③

④

⑤

⑥

①

②

③

> 5
min

Table. 4 [Heater Operation Example]

Step Condition Result

(To -TRA) > 2.7 °F [1.5 °C] AND TRA has not increased by 0.9 °F [0.5°C] in X min EH1 ON

(To -TRA) < 2.7 °F [1.5 °C] AND TRA increasing faster than 0.9 °F [0.5°C] in 5 min EH2 not ON

(To -TRA) < 0.9 °F [0.5°C] EH1 OFF

(To -TRA) > 2.7 °F [1.5 °C] AND TRA has not increased by 0.9 °F [0.5°C] in X min EH1 ON

(To -TRA) > 2.7 °F [1.5 °C] AND TRA not increasing faster than 0.9 °F [0.5°C] in 5 min EH2 ON

(To -TRA) < 0.9 °F [0.5°C]

EH1 OFF
EH2 OFF

T

RA

⑥

①

②

③

⑥

②

③

③

⑥

③

T

RA

④

⑥

T

RA

⑤

⑥

⑥

25

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

Note:

(1) Turning on the heater with the fan setting set to OFF requires that the DIP S/W and connectors on the indoor
units are set on site.

Fan control

Pattern

PVFY-NAMU-E1

CN22 for FAN control

(CN24RELAY-KIT-CM3)

DIP S/W3-2
(Indoor unit)

DIP S/W3-4

(Indoor unit)

Fan in error

*1

Fan in defrost

Fan

(All modes other than

defrost and error)

1

Disabled

ON

OFF Stop (Heater OFF)

Set (Heater ON)

High *2 (Heater ON)

2 ON

Stop (Heater OFF)

High (Heater ON)

3

Enabled

OFF Low (Heater OFF) Stop (Heater OFF)

Stop (Heater OFF)

Stop (Heater ON)

4 ON

Low (Heater OFF)

Low (Heater ON)

Stop (Heater OFF)

Stop (Heater ON)

*1 Heater will not operate during all error modes. Heater will only operate during a communication error between indoor unit and
outdoor unit
*2 While the heater is on, the fan will operate at high speed regardless of the fan setting on the remote controller.

* If a heater is installed in the duct, do not use CN22. By doing so, the fan will turn off when the heater is on,

which may result in fire.

(2) Back-up heating will not be performed when the heater turns on while demand control is performed (not a
request item).
(3) 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.

26

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

2. CN24RELAY-KIT-CM3 (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.............................2 in total

Two types of cables with different connectors are included.

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

White: 3

(2) Connection to the indoor unit

• Use the cables that fit the connectors on the indoor unit control board.

1) External output cable

This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel

heater.Select the heater output pattern (1st =CN24-1 or 2nd = CN24-2) to use, and connect the cable to the
connector on the indoor unit control board that corresponds to the selection.

1) Panel heater 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 to CN22 as appropriate

The following section describes installation of the External Heater Adapter that connects to PEA-A AA
series indoor unit. This products is the special wiring parts to drive an electric heater wi th the air conditioner.

(1) Parts list

Check that the following par ts are included in the package.

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

Tw o types of cables with differen t 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.

1) External output cable (with a yellow connector)
This cable is used to connect a rela y circuit for an interlocked operati on with either an electric or a panel heater.
C onnect the cable to CN24 on the indoor unit control board.

2) Panel heater co nnector (with a white connector)
This connector is used to perform an interlocked operation

with a p anel heater. Depending on the indoor unit

control board specification , connect the cable to CN4Y as appropriate

CN4Y for FAN control
(CN24RELAY-KIT-CM3)

<Image>

6-3. PAC-YU25HT (Optional Parts) installation

27

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

(3) Wiring

• A basic connection method is shown below.

CN24

X

X

Remote control board Relay circuit

Adapter

Indoor unit

control board

retaeH cirtcelE

ecruos rewop

Red 1

White 2

Preparations in the eld

Maximum cable length
is 10 m (32ft)

White

Electric Heater
or panel
heater

Outdoor unit

control board

• PUHY, PURY-P-TGMU
type Dip switch SW5-2
“ON/OFF”

• PUHY, PURY-P-THMU/
YHMU/TJMU/YJMU type
Dip switch SW5-10 “ON/
OFF”

• PUHY, PURY-P-TKMU/
YKMU type Dip switch
SW4: 932 “ON/OFF”

• PUMY series
Dip switch SW4-4
“ON/OFF”

• PUHY, PURY-P-TLMU/
YKMU type Dip switch
SW4: 932 “ON/OFF”

CN22

White 1

White 2

White

• The length of the electrical wiring for the CN24RELAY-KIT-CM3 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 mm2 ~ 1.25 mm2 (16 to 22 AWG)
Don't extend the cable more than 10 meters (32ft)

Recommended circuit

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

FS1

FS2
FS1

FS2

R

S

R

S

CN24-1 or CN24-2

H2

88H

H1

88H

26H

88H

(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.

28

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

7. Humidifier control

The below table shows how the field installed humidifier and fan speed is controlled.

A basic connection method is shown below.

1. Control specifications and DIP S/W setting

2. Installation

DIP switch

setting

Humidistat
output

Condition (no defrost/no error) CN25 output Fan speed

SW16 CNFinput

OFF OFFHeat operation & Thermo OFFOFF RC setting

Heat operation & Thermo ON

ON Heat operation & Thermo OFF OFFRC setting

Heat operation & Thermo ON ON High

ON OFFHeat operation & Thermo OFF OFFRC setting

Heat operation & Thermo ON

ON Heat operation & Thermo OFF ON High

Heat operation & Thermo ON

- -Except for heat operation OFFRC setting

RC:Remote controller
The fan continues to run for 30 seconds after the humidifier stops.

CNF

CN25

Humidistat

XA

SVA

Humidifier

XA

Indoor unit
control board

On-site preparation
Maximum cable length is 10m(32ft)

Humidifier

power source

Use XA relay having following specifications

Rated voltage:12VDC
Power consumption:1W or less

Humidistat:Minimum applicable load 1mAat DC

Contact rating voltage:15VDC or more
Contact rating current:0.1A or more

7. Fan indication

The below table shows how the fan indication is controlled.

A basic connection method is shown below.

1. Indication specifications

2. Installation

Condition
Fan speed

CNEC2 output

Relay on the board No. of CNEC2

Very low X11 1
Low X12 2

Middle X13 3
High X14 4

Indoor unit power board

XF1

XF2

XF3

XF4

COM

High

Middle

Low

Very low

1

2

3

4

5

On-site preparation
Maximum cable length is 10m(32ft)

XF1,2,3,4 power source: DC30V, 1A or less,

AC230V, 1A or less

X11

X12

X13

X14

CNEC2

1

2

3

4

5

29

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

1. Check methods

1. Component and check points
(1) Thermistor

• Room temperature thermistor (TH21)

• Liquid pipe thermistor (TH22)

• Gas pipe thermistor (TH23)

Rt = 15 exp { 3480(

)}

1

273+t

1

273

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

Normal Abnormal

4.3kΩ - 9.6kΩ 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

0

= 15 kΩ±3%

• Multiplier of B = 3480 kΩ±2%

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

(A) Temperature (°C)[°F]
(B) Resistance (kΩ)

0

10

20

30

40

50

-20 -10 01020304050

-4 14 32 50 68 86 104 122

(A)

(B)

(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.

1
2
3
4

6

LEV

M

(A)

(C)

(D)

(E)

(F)

CN60

Normal Abnormal

1-6 2-6 3-6 4-6

Open or short

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

(150) 10%

(A) Red

(C) Blue
(D) Orange
(E)Yellow
(F)White

9 TROUBLESHOOTING

30

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

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

4

3

6

5

2

1

(G)

(H)

(I)

(J)

(A)

(A)

(B)

(C)

(C)

(D)

(D)

(E)

(E)

(F)

(F)

12VDC

M

4

6

2

3

5

1

(A) Red (G) Control board
(C) Blue (H) Connection (CN60)
(D) Orange (I) Drive circuit
(E) Yellow (J) Linear expansion valve
(F) White

Pulse signal output and valve operation

Phase

number

Output pulse

1 2 3 4

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.

31

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

2) LEV operation

(f)

(a)

(b)

(e)

(d)

(c)

(a) Close
(b) Open
(c) Fully open valve (2000 pulses or 3000 pulses)
(d) No. of pulses
(e) Extra tightening (41 - 100 pulse)
(f) Valve opening degree

• When the power is turned on, a pulse signal of fully open pulse + 10% pulse 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.

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

6

5

4

3

2

1

1 k

LED

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.

Replace the LEV.

Disconnected or

shorted LEV motor
coils

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

Replace the LEV.

32

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

Symptom Checking Criteria Remedy

Valve closure failure
(leaky valve)

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.

Replace the LEV if
the amount of
leakage is great.

(A)

LEV

(A) Termistor (TH22)

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.

Misconnections of

connectors or

contact failure

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

Disconnect the
connectors on the
control board and
perform a continuity

test.

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Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

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 : The indoor fan cannot turn around.

No

NG

NG

Wiring contact check

Contact of fan motor connector (CNMF)

Check the fuse (FUSE) on indoor
controller board.

Power supply check (Remove the connector (CNMF))

Measure the voltage in the indoor controller circuit

board.

TEST POINT

1 :VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC310~340V

TEST POINT 2 :V

CC

(between 5 (+) and 4 (-) of the fan connector): VCC DC15V

Wiring recovery

Replace drain pump (DP).

Replace indoor controller board.

Measuring points Resistance

PVFY-

P12,18,24,30,36

NAMU-E1

PVFY-

P48,54

NAMU-E1

pin 1 - pin 4

pin 5 - pin 4 50kΩ

pin 6 - pin 4 150kΩ

O.L.

O.L.

47kΩ

143kΩ

1MΩ

O.L.

pin 7 - pin 4

Replace indoor controller board (I.B).
Replace fan motor (MF).

Replace indoor

controller board.

Is the resistance of the fan motor

normal?(Refer to below table)

Does the voltage between pin 7 and pin 4

of connector CNMF repeat 0V and 5V?

Replace the fan motor.

Is the voltage normal?

Is there no contact failure?

Ye s

Ye s

Ye s

No

No

No

No

Ye s

Did the fuse blow?

Check the drain pump (DP)
Is the resistance between
terminals normal?

No

Ye s

Ye s

No

Check the operation of fan.

*To measure the resistance, connect
the negative (-) end of the tester to pin 3.

Ye s

Check the operation.

Does the fan motor rotate smoothly?

Tu rn OFF the power supply and
connect the connector CNMF.
Tu rn ON the power supply and
measure the voltage of connector
CNMF while rotaing the motor by
the hand.

END

OK

END

OK

NG

Replace indoor controller board.

Replace the fan motor.

Check the operation of fan.

Measure the resistance of the fan motor.

Ye s

END

OK

34

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

3, Address switch setting

Make sure that power to the unit is turned off.

ON

OFF

ON

OFF

(A)

(B)

(A) Indoor unit control board
(B) Factory setting (all models)

1. Address settings vary in different systems.
Refer to the section on address setting in the outdoor unit installation manual.

2. 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."

35

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

4. Voltage test points on the control board

1. PVFY-P12, 18, 24, 30, 36, 48, 54NAMU-E1

CND F01

CNEC1

CNEC2

FMNC1AXNC1CXNC1BXNC

PC51

(*1)

C25

(*1)

C53

(*1)

CN3A

CN2M

SW4

CN24-1

CN24-2

CN32

Indoor controller board

SW3

CN41

CN51

CN52

CN20

CN22

CN7V

CN4F

CN44

SWE

SW2

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 temperature)

CN4F Float sensor

CN22 For fan control

CN24-1 For 1st heater control

CN24-2 For 2nd heater control

CN20 Thermistor (Inlet temperature)

CNMF Fan motor output

1 - 4: 294 - 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)

CN7V Connect to the indoor power board

CNEC1 Connect to the indoor controller board

CNEC2 FAN OUT

(*1)

VFG Voltage on the (-) side of PC51 and C25

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

VCC Voltage 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)

36

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

5. Dipswitch setting (Factory setting)

1. Function setting

(1) SW1

Switch

position

Function

Switch setting

ON OFF

1

Active Thermistor
(Intake air thermistor)

Built-in thermistor on the remote
controller

Indoor unit

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

(2) SW3

Switch

position

Function

Switch setting

ON OFF

1 Unit type Cooling only Heat pump

2

Heater

available

Heater available Heater not available

3 - - -

4

Heater
control

Heater ON during defrost and error Heater OFF during defrost and error

5 -

6 - - -

7 - - -

8

Heating

4-deg up

Disabled Enabled

9 - - -

10 - - -

Indoor control board
Dipswitch settings must be made while the unit is stopped.
Factory setting

37

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

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.

PVFY-P12NAMU-E1

PVFY-P18NAMU-E1 PVFY-P24NAMU-E1

PVFY-P30NAMU-E1

PVFY-P36NAMU-E1 PVFY-P48NAMU-E1 PVFY-P54NAMU-E1

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

220V

(208V)

240V

(230V)

Set SW5 to 240V side when the power supply is 230 volts.
When the power supply is 208 volts, set SW5 to 220V side.

38

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

5. External static pressure
(1) SWA, SWC

1) Indoor control board

All models

75Pa(0.30in.WG)

1

2

3

SWA

Vertical, Horizontal Right, Horizontal left

SWC

125Pa(0.50in.WG)

1

2

3

SWA SWC

200Pa(0.80in.WG)

1

2

3

SWA SWC

75Pa(0.30in.WG)

1

2

3

SWA

Down flow

SWC

125Pa(0.50in.WG)

1

2

3

SWA SWC

200Pa*(0.80in.WG)

1

2

3

SWA SWC

*PVFY-P36 in Downflow External static pressure: 150Pa (0.60in.WG)

PVFY-P54 in Downflow External static pressure: 175Pa (0.70in.WG)

1

1

2

1

2

1

2

1

2

2

1

2

1

2

Factory
setting

1

2

3

SWA SWC

1

2

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 ME remote controller 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.

39

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

1. Control box

Exercise caution when removing heavy parts.

1. Remove the Electric panel (2 screws).

Fig.1

10 DISASSEMBLY PROCEDURE

40

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

2. Thermistor (Return Air)

Exercise caution when removing heavy parts.

1. Remove the Filter panel (2 thumbscrews).

A

B

C

D

E

F

G

H

I

16151413121110

987654321

COMMERCIAL TOLERANCE

WORK GRADE

CASTING

FINE COARSE

PRESS WORKING

ED

CBA

ITEM MODEL NAME

Fig. 3

2. Remove the Blower panel (2 screws).

3. Remove the cover over the Return Air thermistor
box and unplug the thermistor.

4. Pull out the thermistor holder and thermistor inside
the box.

A

B

C

D

E

F

G

H

16151413121110

Fig. 4

41

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

3. Coil Assembly (thermistor, drainpan, heat exchanger)
Exercise caution when removing heavy parts.

1. Remove the Electrical, Blower and
Filter panel indicated in sections
1 and 2.

2. Remove the Coil panel by
removing all of the screws
securing it to the (3) smaller
panels for refrigerant and drain
lines.

A

B

C

D

E

F

G

H

I

16151413121110

987654321

COMMERCIAL TOLERANCE

WORK GRADE

CASTING

FINE COARSE

PRESS WORKING

ED

CBA

ITEM MODEL NAME

The parts are required to meet the latest RoHS directive.

DETAIL A

DETAIL B

Fig. 5

3. Slide the smaller panels in the
directions indicated and remove.

Fig. 6

4. Remove the (1 or 2) brackets that
secure the coil, unplug the
thermistors and LEV from the
control board and route the wires
out of the control box area and
into the coil section. Next, slide
the coil from the frame.

Fig. 7

987654321

The parts are required to meet the latest RoHS directive.

Fig. 8

42

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

5. Remove the plate covering the coil
assembly to access the
thermistors.

Fig. 9

6. Remove lower and side drain
pan.

Fig. 10

43

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

4. Blower/Fan Assembly

Exercise caution when removing heavy parts.

1. Remove the Blower and Filter panel (along with filter
if installed) indicated in section 2.

2. Remove the (1 or 2) brackets that secure the coil
assembly. (Fig.11)

Fig. 11

3. Remove the door that covers the small enclosure
attached to the fan assembly (Fig.12). Unplug the
motor and route the wire harness out of the
enclosure.

4. Remove the (2) screws that secure the fan
assembly and slide out.

Fig. 12

MEUS DOC# MD-1404-K007, January 2017

Specications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.

www.mitsubishielectric-usa.com

Toll Free: 800-433-4822

MITSUBISHI ELECTRIC US, INC.

Please be sure to put the contact address/telephone number on

this manual before handing it to the customer.

This product is designed and intended for use in the residential,

commercial and light-industrial environment.