Mitsubishi Electric CITY MULTI PVFY-P12NAMU-E Operating manual

ii
HWE1405A GB
Safety Precautions
Read before installation and performing electrical work
Symbol explanations
Thoroughly read the following safety precautions prior to installation.
Observe these safety precautions for your safety.
This equipment may have adverse effects on the equipment on the same power supply system.
Contact the local power authority before connecting to the system.
WARNING
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or death.
CAUTION
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or dam-
age to the unit.
Indicates an action that must be avoided.
Indicates important instructions.
Indicates a parts that requires grounding.
Indicates that caution must be taken with rotating parts. (This symbol is on the main unit label.) <Color: Yellow>
Indicates that the parts that are marked with this symbol pose a risk of electric shock. (This symbol is on the main
unit label.) <Color: Yellow>
WARNING
Carefully read the labels affixed to the main unit.
WARNING
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 leak-
age, 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 in-
jury.
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.

ii
HWE1405A GB
Have all electrical work performed by an authorized electri-
cian 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 infil-
trate 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 gener-
ated.
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 recom-
mended by Mitsubishi Electric may result in smoke, fire, or
explosion.
Consult your dealer for proper disposal method.
Do not use a leak detection additive.

iiiiii
HWE1405A GB
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 re-
sidual 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 deox-
idized 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 refrig-
erator oil to deteriorate.
Store the piping materials indoors, and keep both ends of
the pipes sealed until immediately before brazing. (Keep el-
bows 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 re-
frigerator 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 cy-
cle 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 detec-
tor, 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.

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HWE1405A GB

CONTENTS
HWE1405A GB
I
Features
[1] Features.................................................................................................................................... 1
II
Components and Functions
[1] Components and Functions...................................................................................................... 2
III
Specifications
[1] Specifications............................................................................................................................ 5
1.Specifications.......................................................................................................................... 5
2.Electrical component specifications........................................................................................ 7
IV
Outlines and Dimensions
[1] Outlines and Dimensions.......................................................................................................... 8
V
Wiring Diagram
[1] Wiring Diagram ....................................................................................................................... 10
VI
Refrigerant System Diagram
[1] Refrigerant system diagram.................................................................................................... 11
VII
Microprocessor Control
[1] Microprocessor Control........................................................................................................... 12
1.Cool operation ...................................................................................................................... 12
2.Fan operation........................................................................................................................ 13
3.Heat operation ...................................................................................................................... 14
4.Auto operation [Automatic cool / heat change over operation] ............................................. 15
5.Heater control ....................................................................................................................... 16
6.Humidifier control.................................................................................................................. 21
7.Fan indication ....................................................................................................................... 21
VIII
Troubleshooting
[1] Troubleshooting ...................................................................................................................... 22
1.Check methods..................................................................................................................... 22
2.DC fan motor (fan motor/indoor control board)..................................................................... 26
3.Address switch setting .......................................................................................................... 27
4.Voltage test points on the control board ............................................................................... 28
5.Dipswitch setting (Factory setting)........................................................................................ 29
IX
Disassembly Procedure
[1] Disassembly Procedure.......................................................................................................... 32
1.Control box ........................................................................................................................... 32
2.Thermistor (Return Air) ......................................................................................................... 33
3.Coil Assembly (thermistor, drainpan, heat exchanger)......................................................... 34
4.Blower/Fan Assembly ...........................................................................................................36

HWE1405A GB

[ I Features ]
- 1 -
HWE1405A GB
I Features
[1] Features
Model Cooling capacity/Heating capacity
BTU/h kW
PVFY-P12NAMU-E 12000/13500 3.5/4.0
PVFY-P18NAMU-E 18000/20000 5.3/5.9
PVFY-P24NAMU-E 24000/27000 7.0/7.9
PVFY-P30NAMU-E 30000/34000 8.8/10.0
PVFY-P36NAMU-E 36000/40000 10.6/11.7
PVFY-P48NAMU-E 48000/54000 14.1/15.8
PVFY-P54NAMU-E 54000/60000 15.8/17.6

[ II Components and Functions ]
- 2 -
HWE1405A GB
II Componen ts and Function s
[1] Components and Functions
1. Indoor (Main) Unit
(1) Vertical (2) Horizontal Right
(3) Horizontal Left (4) Down Flow
Air inlet
Air outlet
Air
inlet Air
outlet
Air
inlet
Air
outlet
Air inlet
Air outlet

[ II Components and Functions ]
- 3 -
HWE1405A GB
2. Remote Controller
[PAC-YT53CRAU]
Once the operation mode is selected, the unit will remain in the selected mode until changed.
(1) Remote Controller Buttons
Keep the remote controller out of direct sunlight to ensure accurate measurement of room temperature.
The thermistor at the lower right-hand section of the remote controller must be free from obstructions to ensure accurate mea-
surement of room temperature.
To set the functions that are not available on this controller (PAC-YT53CRAU), use MA remote controller or the centralized
controller.
.
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.

[ II Components and Functions ]
- 4 -
HWE1405A GB
(2) Remote Controller Display
*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 COOLHEATFAN
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, HEAT, or
AUTO (single set point) modes
In AUTO (dual set point) or
SETBACK modes
Room Set to
AUTO COOLHEATFAN
DRYING VENTI. SETBACK
Preset
temperature
Room Set to
AUTO COOLHEATFAN
DRYING VENTI. SETBACK
Heating preset
temperature
Cooling preset
temperature

[ III Specifications ]
- 5 -
HWE1405A GB
III Specifications
[1] Specifications
1. Specifications
Model PVFY-P12NAMU-E PVFY-P18NAMU-E PVFY-P24NAMU-E PVFY-P30NAMU-E
Power source 1-phase 208/230V 60Hz
Cooling capacity *1 BTU / h 12,000 18,000 24,000 30,000
(Nominal) *1 kW 3.5 5.3 7.0 8.8
Power input kW 0.08 0.13 0.18 0.21
Current input A 0.80/0.70 1.20/1.10 1.60/1.40 2.00/1.70
Heating capacity *2 BTU / h 13,500 20,000 27,000 34,000
(Nominal) *2 kW 4.0 5.9 7.9 10.0
Power input kW 0.08 0.13 0.18 0.21
Current input A 0.80/0.70 1.20/1.10 1.60/1.40 2.00/1.70
External finish Galvanized steel cabinet -Powder coated slate gray
External dimension H x W x D in. 50-1/4x17x21-5/8 54-1/4x21x21-5/8
mm 1275 x 432 x 548 1378 x 534 x 548
Net weight lbs (kg) 113(51) 141(64)
Heat exchanger Cross fin (Aluminium fin and copper tube)
FAN Type x Quantity Sirocco fan x 1
External in.WG <0.30>-0.50-<0.80>
static press. Pa <75>-125-<200>
Motor type DC motor
Motor output kW 0.121 0.244
Driving mechanism Direct-driven by motor
Airflow rate cfm 280-340-400 410-497-585 515-625-735 613-744-875
(Low-Mid-High) m3/ min 7.9-9.6-11.3 11.6-14.1-16.6 14.6-17.7-20.8 17.3-21.1-24.8
L / s 132-160-188 193-235-277 243-295-347 290-352-413
Sound pressure level
dB <A> 27-31-35 28-32-36 30-34-38 32-36-40
(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 CITY MULTI
Diameter of Liquid (R410A) in. (mm) 1/4 (6.35) Brazed 1/4 (6.35) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed
refrigerant
pipe Gas (R410A) in. (mm) 1/2 (12.7) Brazed 1/2 (12.7) Brazed 5/8 (15.88) Brazed 5/8 (15.88) Brazed
(O.D.)
Diameter of drain pipe in. (mm) 3/4 (19.05) FPT
Drawing External PA94C316
Wiring PA94C110
Refrigerant cycle -
Standard Document Installation Manual, Instruction Book
attachment Accessory Tie band, Plastic tube, Drain pan seal
Optional External heater adapter PAC-YU25HT
parts
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.
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
(26.7degC D.B. / 19.4degC W.B.) (21.1degC D.B.) BTU/h = kW x 3,412
Outdoor : 95degF D.B. 47degF D.B. / 43degF W.B. cfm = m3/min x 35.31
(35degC D.B.) (8.3degC D.B. / 6.1degC W.B.) lbs = kg / 0.4536
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 0.50in. WG(125Pa) at factory shipment. subject to rounding variation.
*Due to continuing improvement, above specification may be subject to change without notice.

[ III Specifications ]
- 6 -
HWE1405A GB
Model PVFY-P36NAMU-E PVFY-P48NAMU-E PVFY-P54NAMU-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 0.34 0.42 0.48
Current input A 3.00/2.70 3.50/3.30 3.90/3.70
Heating capacity *2 BTU / h 40,000 54,000 60,000
(Nominal) *2 kW 11.7 15.8 17.6
Power input kW 0.34 0.42 0.48
Current input A 3.00/2.70 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. 54-1/4x21x21-5/8 59-1/2x25x21-5/8
mm 1378 x 534 x 548 1511 x 635 x 548
Net weight lbs (kg) 141(64) 172(78)
Heat exchanger Cross fin (Aluminium fin and copper tube)
FAN Type x Quantity Sirocco fan x 1
External in.WG <0.30>-0.50-<0.80>
static press. Pa <75>-125-<200>
Motor type DC motor
Motor output kW 0.244 0.430
Driving mechanism Direct-driven by motor
Airflow rate cfm 767-931-1095 980-1190-1400 1040-1262-1485
(Low-Mid-High) m3/ min 21.7-26.4-31.0 27.7-33.7-39.6 29.4-35.7-42.0
L / s 362-440-517 463-562-660 492-595-702
Sound pressure level
dB <A> 35-39-43 35-39-43 36-40-44
(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 CITY MULTI
Diameter of Liquid (R410A) in. (mm) 3/8 (9.52) Brazed 3/8 (9.52) Brazed 3/8 (9.52) Brazed
refrigerant
pipe Gas (R410A) in. (mm) 5/8 (15.88) Brazed 5/8 (15.88) Brazed 5/8 (15.88) Brazed
(O.D.)
Diameter of drain pipe in. (mm) 3/4 (19.05) FPT
Drawing External PA94C316
Wiring PA94C110
Refrigerant cycle -
Standard Document Installation Manual, Instruction Book
attachment Accessory Tie band, Plastic tube, Drain pan seal
Optional External heater adapter PAC-YU25HT
parts
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.
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
(26.7degC D.B. / 19.4degC W.B.) (21.1degC D.B.) BTU/h = kW x 3,412
Outdoor : 95degF D.B. 47degF D.B. / 43degF W.B. cfm = m3/min x 35.31
(35degC D.B.) (8.3degC D.B. / 6.1degC W.B.) lbs = kg / 0.4536
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 0.50in. WG(125Pa) at factory shipment. subject to rounding variation.
*Due to continuing improvement, above specification may be subject to change without notice.

[ III Specifications ]
- 7 -
HWE1405A GB
2. Electrical component specifications
Component Sym-
bol
PVFY-
P12NAMU-E
PVFY-
P18NAMU-E
PVFY-
P24NAMU-E
Room temperature
thermistor
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
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 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 Sym-
bol
PVFY-
P30NAMU-E
PVFY-
P36NAMU-E
Room temperature
thermistor
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
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 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 Sym-
bol
PVFY-
P48NAMU-E
PVFY-
P54NAMU-E
Room temperature
thermistor
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
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 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

[ IV Outlines and Dimensions ]
- 8 -
HWE1405A GB
IV Outlines and Dimensions
[1] Outlines and Dimensions
1. PVFY-P12,18, 24, 30, 36, 48, 54NAMU-E
E
402(15-7/8)
55(2-3/16)
F
525.5(20-3/4) 8(3/8)
24(15/16)
28.8(1-3/16)
76(3)
13.2(9/16)
117.4(4-5/8)
548(21-5/8)
470(18-9/16) 50.8(2)
Note 1.Keep the service space for maintenance at the front.
Terminal block (Remote controller transmission)
(Duct)
Ø26 Knockout Hole
(Remote controller transmission)
Ø26 Knockout Hole
(Remote controller transmission)
Top
Front
Bottom
view
Right side
view
Model
Nominal Filter Size Duct Connection
PVFY-P12NAMU-E
376X402
(14-13/16X15-7/8)
PVFY-P18NAMU-E PVFY-P24NAMU-E
477X402
(18-13/16X15-7/8)
PVFY-P30NAMU-E PVFY-P36NAMU-E PVFY-P48NAMU-E
508X609.6X25.4
(20X24X1)
579X402
(22-13/16X15-7/8)
PVFY-P54NAMU-E
43(1-3/4)
Terminal block (Indoor / Outdoor unit connection)
Control box
Primary drain pipe (Gravity drain) Ø19.05(3/4) 3/4"FPT
Secondary drain pipe (Emergency draining) Ø19.05(3/4) 3/4"FPT
(Horizontal Right)
Primary drain pipe (Gravity drain) Ø19.05(3/4) 3/4"FPT
B(Duct)
43(1-3/4) 8(3/8)
92(3-5/8) 30(1-3/16)
8(3/8)
55(2-3/16)
A
36.8(1-1/2)
Refrigerant piping
brazing connection(gas)
Air filter
Air outlet
Air inlet
2-Ø4.6 Burring Holes for electric heat installation
Ø26 Knockout Hole
Secondary drain pipe
(Emergency draining)
Ø19.05(3/4) 3/4"FPT
(Indoor / Outdoor unit connection)
Unit:mm(in.)
Top
view
Bottom
view
70(2-13/16)
55(2-3/16)
Refrigerant piping
brazing connection(liquid)
Primary drain pipe (Gravity drain) Ø19.05(3/4) 3/4"FPT
(Horizontal left)
Secondary drain pipe (Emergency draining) Ø19.05(3/4) 3/4"FPT
104.5(4-1/8)
105.7(4-3/16)
Ø
26 Knockout Hole
(Indoor / Outdoor
unit connection)
Model A B C D E H J Gas pipe Liquid pipe
PVFY-P12NAMU-E
680
(26-13/16)
823
(32-7/16)
735.5
(29)
360
(14-3/16)
Ø12.7
(1/2)
Ø6.35
(1/4)
PVFY-P18NAMU-E PVFY-P24NAMU-E
Ø15.88
(5/8)
Ø9.52
(3/8)
PVFY-P30NAMU-E
737
(29-1/16)
953.5
(37-9/16)
792
(31-3/16)
461
(18-3/16)
PVFY-P36NAMU-E PVFY-P48NAMU-E
798.5
(31-7/16)
1053
(41-1/2)
853.5
(33-5/8)
563
(22-3/16)
PVFY-P54NAMU-E
FG
432
(17)
376
(14-13/16)
281
(11-1/8)
224
(8-7/8)
1275
(50-1/4)
534
(21)
477
(18-13/16)
382.6
(15-1/8)
266.5
(10-1/2)
1378
(54-1/4)
635
(25)
579
(22-13/16)
484.6
(19-1/8)
317.5
(12-1/2)
1511
(59-1/2)
Left side
view
508X406.4X25.4
(20X16X1)
508X508X25.4
(20X20X1)
J
G
H
D
C
1
2
12
3
3
Unit : mm(in.)

[ IV Outlines and Dimensions ]
- 9 -
HWE1405A GB
609.6(24)
Width of Unit
609.6(24)
Length of Unit
Clearance Area
Vertical Installation Horizontal Installation
Unit : mm(in.)

[ V Wiring Diagram ]
- 10 -
HWE1405A GB
V Wiring Diagram
[1] Wiring Diagram
1. PVFY-P12, 18, 24, 30, 36, 48, 54NAMU-E
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 block 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
2
1
6 5 3 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
5 3 4 73
2 1 3 441
2
1
4 3 1 2
2 1
5 4 2 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
L2
G
L1
2
1
TB15
TO OUTDOOR UNIT
BC CONTROLLER REMOTE CONTROLLER
TO MA REMOTE
CONTROLLER
60Hz

[ VI Refrigerant System Diagram ]
- 11 -
HWE1405A GB
VI RefrigerantSystem Diagram
[1] Refrigerant system diagram
(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-E PVFY-P24, 30, 36, 48, 54NAMU-E
Gas pipe ø12.7 [1/2] ø15.88 [5/8]
Liquid pipe ø6.35 [1/4] ø9.52 [3/8]
(H)
(I)
(F)
(E)(E)
(C)
(G)
(A)
(D)
(B)

[ VII Microprocessor Control ]
- 12 -
HWE1405A GB
VII Microprocessor Control
[1] Microprocessor Control
1. Cool operation
1. Termoregulating function
(1) Thermoregulating 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 + 1.8°F ···Thermo ON
Room temperature desired temperature ···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 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)
When [Auto] is set, fan speed is changed depending on the value of: Room temperature - Desired temperature
<How to operate>
1. Press POWER button.
2. Press the operation button to display COOL.
3. Press the button to set the desired temperature.
The set temperature changes 2°F when the button is
pressed one time. Cooling 67 to 87°F
Type Fan speed notch
3 speeds + Auto type [Low], [Med], [High], [Auto]
.
ON/OFF
MODE
TEMP.
TEMP.

[ VII Microprocessor Control ]
- 13 -
HWE1405A GB
2. Fan operation
1. Fan
(1) Set by remote controller.
When [Auto] is set, fan speed becomes [Low].
<How to operate>
1. Press POWER button.
2. Press the operation button to display FAN.
Type Fan speed notch
3 speeds + Auto type [Low], [Med], [High], [Auto]
.
ON/OFF
MODE