Mitsubishi Electric PUMY-P36NHMU Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES...................................2
2. SAFETY PRECAUTION....................................5
3. OVERVIEW OF UNITS...................................... 8
4. SPECIFICATIONS...........................................10
5. DATA................................................................12
6. OUTLINES AND DIMENSIONS......................18
7. WIRING DIAGRAM.........................................20
8.
NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION..... 24
9. TROUBLESHOOTING.................................... 34
10. ELECTRICAL WIRING....................................81
11. REFRIGERANT PIPING TASKS.....................84
12. DISASSEMBLY PROCEDURE........................88
13. PARTS LIST..................................................... 93
14. RoHS PARTS LIST..........................................96
15. OPTIONAL PARTS..........................................99
OUTDOOR UNIT
No. OC366
REVISED EDITION-C
[Model name]
(Standard type)
PUMY-P36NHMU
PUMY-P48NHMU
(Salt proof type)
PUMY-P36NHMU-BS
PUMY-P48NHMU-BS
HFC
utilized
R410A
Model name
indication
July 2008
NOTE :
· This service manual describes technical data of out-
door unit.
As for indoor units, refer to its service manual.
· RoHS compliant products have <G> mark on the spec
name plate.
[Service Ref.]
PUMY-P36NHMU
PUMY-P48NHMU
PUMY-P48NHMU1
PUMY-P48NHMU2
PUMY-P36NHMU-BS
PUMY-P48NHMU-BS
PUMY-P48NHMU1-BS
PUMY-P48NHMU2-BS
Revision:
• 9. TROUBLESHOOING
has been modified.
• Tester check point is added
(PCB, FAN MOTOR).
• Please void OC366
REVISED EDITION-B.

2
PUMY-P48NHMU1PUMY-P48NHMU2
PUMY-P48NHMU1-BS PUMY-P48NHMU2-BS
· Compressor (MC) and oil have been changed.
ANB33FDCMT (Ester oil: MEL56) ANB33FDHMT(Ether oil: FV50S)
· Electrical parts have been changed.
Multi controller board (MULTI. C.B.) Noise filter circuit board (N.F.)
Active filter module (ACTM) Relay (52C) , Resister (RS) (including N.F.)
PUMY-P48NHMU PUMY-P48NHMU1
PUMY-P48NHMU-BS PUMY-P48NHMU1-BS
• Primary heating ON/OFF control has been added.
1TECHNICAL CHANGES
(1) Primary heating operation controls another heat source that depends on the main system's operations,
which means the interlock operation shown in "c)" will be possible.
a)
b) Note: Following Indoor models DO NOT HAVE this feature available:
PMFY-P06NBMU PMFY-P12NBMU PKFY-P06NAMU
PMFY-P08NBMU PMFY-P15NBMU PKFY-P08NAMU
c) Different Indoor unit applications that can be applied:
(2) Outdoor unit DIPSW4-4 for Primary Heating Control:
Set DIPSW4-4 when power is turned off at unit.
OFF: Disable Primary Heating Function (Initial setting)
ON : Enable Primary Heating Function
(3) Determine required Indoor Fans Speed during defrost mode:
0 20k 27k 39k 62K
None Black Blue White Red
Stopped Setting on remote
controller Very Low Low High
Note: The setting will be disabled "when Heater contact signal is OFF".
Service ref. PUMY-P48NHMU(-BS) does not have this function.
Indoor unit must be R410A UL model for this function to operate.
CN22 input resistance ()
CN22 input (cable color)
FAN SPEED SETTING
OFF
Fan airflow rate setting
During defrost operation ON Wiring
CN22
1-1. PRIMARY HEATING ON/OFF CONTROL SET-UP
a) With no Primary heating output the Indoor fan normally goes off to prevent cold drafts during the defrost cycles.
b) With Primary heating control the auxiliary heat will be on during defrost mode, thus cold drafts will not be present.
(Ducted units only)
c) For models PEFY and PDFY (Ducted) recommended to use "Black" (20K) connector.
d) For models PLFY, PCFY, PKFY and PFFY (Ductless) recommended "None", no connector required.
e) To set the fan airflow rate to be used during defrost operation, insert the resistance that is packed within the
optional adaptor cable kit (PAC-YU24HT-F) into the CN22 sensor input.
You can choose at what speed the indoor fan operates during defrost cycles bases on chart below.

3
(4) Determine Fan Airflow setting during Indoor Thermo OFF conditions:
a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options.
b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller".
Fan speed
setting Fan speed setting
OFF ON
SW1-7 SW1-8
OFF OFF Very low
ON OFF Low
OFF ON Setting on
remote
controller
ON
ON
Stopped
(5) Setting Outdoor unit and Auxiliary heat switch over temperatures.
When the DIPSW 4-4 is set to "ON", the outdoor unit and the contact output operates as shown below.
a) Outdoor default setting and operations are shown below:
Stage 1
A
mb. Decreasing - Outdoor unit HP operation
Amb. Incareasing - Defrost : Heater contact ON signal
- Other than defrost : Contact OFF
Stage 2
- Outdoor unit HP operation
- Heater contact ON signal
Stage 3
- Outdoor unit OFF (Standby)
- Heater contact ON signal
TH7 = Outdoor Temperature
a
-12:
[10F]
When the set temperature ranges overlap, the previously set pattern (1,2 or 3) has a priority.
The stage 1 has the highest priority, 2 the second and then 3.
b) Based on above chart listed the sequence of operation on "On Ambient Decrease"
Stage 1 :(TH7 = > 10
: ) : the Outdoor unit runs in HP mode.
Stage 2 :(TH7 = 10
: to -12 : ) : the Outdoor unit runs in HP mode withAuxiliary heating.
Stage 3 :(TH7 = < -12
: ) : Auxiliary heating only (Outdoor unit is OFF).
c) Based on above chart listed the sequence of operation on " On Ambient Increase"
Auxiliary Heating
Signal
Thermo Condition
Setting on
remote controller
b
0:
[32F]
c
10:
[50F]
d
20:
[68F]
Stage 3 :(TH7 = < 0
: ) : Auxiliary heating only (Outdoor unit is OFF).
Stage 2 :(TH7 = > 0
: to 20 : ) : Auxiliary heating with Outdoor unit in HP mode.
Stage 1 :(TH7 = > 20
: ) : Outdoor unit in HP mode only.

4
(6) Locally procured wiring
A basic connection method is shown.
(i.e. interlocked operation with the electric heater with the fan speed setting on high
Recommended circuit
CN24
CN22
X
+
X
Remote control Board Relay circuit Adapter Indoor unit
control board Outdoor unit control board
Electric Heater power source
Electric
Heater
Red 1
White 2
Dip switch
SW4-4 "ON"
Preparations in the field Maximum cable length
is 10 m (32ft)
Red 1
Red 2
YellowGreen
FS1
FS2
FS1
FS2
R
S
R
S
CN24
H2
88H
H1
88H
26H
88H
1-phase power
supply
208V, 230V/60Hz
Control board
FS1, 2 ----- Thermal fuse
H1, H2 ----- Heater
26H--------- Overheat protection
thermostat
88H--------- Electromagnetic contactor
Wiring digram
For relay X use the specifications given below Operation coil
Rated voltage : 12VDC
Power consumption :0.9W or less
*Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU24HT 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(AWG22 to AWG16)
Don`t extend the cable more than 10 meters (32ft).

5
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
2 SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
2-1. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
Avoid using thin pipes.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Keep the tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil etc.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

6
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R410A
·Use the existing fitting specifications.
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check ·Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)
·Cylinder with syphon
8Refrigerant recovery equipment
2-2. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the
performance of the unit.
1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away
by rainwater. (If a sunshade is installed, rainwater may not clean the panel.)
3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water
collecting in the base of the outdoor unit could cause rust.
4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
5. If the unit is damaged during installation or maintenance, be sure to repair it.
6. Be sure to check the condition of the unit regularly.
7. Be sure to install the unit in a location with good drainage.

7
2-3. Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is
same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the
working pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.
1Thickness of pipes
Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness
shown below. (Never use pipes of 0.7mm [7/256 inch] or below.)
2Dimensions of flare cutting and flare nut
The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that,
R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other
refrigerants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have
been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for
R410A also have partly been changed to increase intensity as shown below. Set copper pipe correctly referring to
copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
0.8 [1/32]
0.8 [1/32]
0.8 [1/32]
1.0 [5/128]
—
0.8 [1/32]
0.8 [1/32]
0.8 [1/32]
1.0 [5/128]
1.0 [5/128]
Nominal
dimensions[inch]
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness (mm) [inch]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
9.1 [11/32-23/64]
13.2 [1/2-33/64]
16.6 [41/64-21/32]
19.7 [49/64-25/32]
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions[inch]
Flare cutting dimensions
Outside
diameter Dimension A ( )
+0
-0.4
(mm) [inch]
R410A R22 1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
17.0 [43/64]
22.0 [7/8]
26.0 [1-3/64]
29.0 [1-9/64]
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions[inch]
Flare nut dimensions Outside
diameter[inch] Dimension B
(mm) [inch]
R410A R22
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Safety charger
Charge valve
Vacuum pump
Flare tool
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermis-
tor vacuum gauge and
vacuum valve
Charging cylinder
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Apply to flared section
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Flaring work of piping
Bend the pipes
Cut the pipes
Weld the pipes
Refrigerant charge
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
gerant to thermistor vacuum gauge)
Refrigerant charge
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil, ether oil and
alkylbenzene oil (minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adop-
ter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil, ether oil:
Alkylbenzene oil: minimum amount
(Usable if equipped
with adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
Dimension A
Dimension B

8
3 OVERVIEW OF UNITS
3-1. UNIT CONSTRUCTION
Decorative panel
Model Ceiling
Ceiling
Ceiling Conceald mounted Wall Mounted
Concealed
4-way flow
2-way flow 1-way flow
built-in Exposed Cocealed
(Fresh Air)*1
PLFY-P PLFY-P PMFY-P PEFY-P PDFY-P PKFY-P PCFY-P PFFY-P PEFY-P
Capacity
NCMU-E NBMU-E NLMU-E NBMU-E NMLU-E NMHU-E NMSU-E NMU-E NAMU-E NGMU-E NFMU-E NGMU-E NEMU-E NRMU-E NMHU-E-F
06
08
12
15
18
24
27
30
36
48
54
Ceiling Casette
Ceiling
Supended
Floor Standing
Remote
controller
Name
Model number
Functions
M-NET remote controller
PAR-F27MEA-US
• A handy remote controller for use in conjunction
with the Melans centralized management system.
• Addresses must be set.
• Address setting is not necessary.
MA remote controller
PAR-21MAA
Outdoor unit
Capacity
50% ~130% of outdoor unit capacity
Type 06 ~ Type 54
1~ 8 unit
Indoor unit that
can be connected
Number of units
Total system wide capacity
P48
Type 06 ~ Type 36
1~ 6 unit
P36
Branching pipe
components Branch header (2 branches) Branch header (4 branches) Branch header (8 branches)
CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E
*1. It is possible only by 1:1 system.
(1 indoor unit of Fresh Air type is connected with 1 outdoor unit.)
Operating temperature range (outdoor temperature) for fresh air type indoor units differ from other indoor units.
Refer to 3-2(2).

9
3-2. UNIT SPECIFICATIONS
(1) Method for identifying MULTI-S model
■Indoor unit < When using Model 30 > ■Outdoor unit <When using model 48 >
(2) Operating temperature range
Notes D.B. : Dry Bulb Temperature
W.B. : Wet Bulb Temperature
*1. 10~46°C DB[50~115°FDB] : In case of connecting PKFY-P06/P08 type indoor unit.
P L F Y - P 30 N B M U - E PU M Y - P 48 N H M U -BS
PAC type
Frequency
conversion
controller
Refrigerant
R410A/R22
commonness
Refrigerant
R410A
NEW frequency converter
one-to-many air conditioners
(flexible design type)
Indicates equivalent
to Cooling capacity
Indicates equivalent
to Cooling capacity
Power supply
N: Single phase
208/230V 60Hz
Power supply
N: Single phase
208/230V 60Hz
L : Ceiling cassette
K : Wall-mounted type
E : Hidden skylight type
C: Ceiling suspended type
M: Ceiling cassette type
F : Floor standing type
Outdoor unit
model type
Sub-number
Unit model type
UL model
M-NET control
M-NET control
UL model
Salt proof
type
Frequency
conversion
controller
Outdoor unit
MULTI-S
Cooling
W.B. 15~24°C [59~75°F]
Heating
D.B. 15~27°C [59~81°F]
W.B. -18~15°C [0~60°F]
Indoor-side intake air temperature
Outdoor-side intake air temperature D.B. -5~46°C [23~115°F]*1
(3) Guaranteed voltage
198~253V, 60Hz
■In case of connecting fresh air type indoor unit
air type indoor
Capacity of Fresh
Cooling Heating
Indoor-side and Outdoor-side P30 D.B.21~43[70~109°F] *2
W.B.15.5~35[60~95°F] D.B.-10~20[14~68°F] *3
intake air temperature P54 D.B.21~43[70~109°F] *2
W.B.15.5~35[60~95°F] D.B.-5~20[23~68°F] *3
*2.Thermo-off(FAN-mode) automatically starts if the outdoor temp. is lower than 21D.B.[70°FD.B.].
*3.Thermo-off(FAN-mode) automatically starts if the outdoor temp. is higher than 20D.B.[68°FD.B.].

10
4 SPECIFICATIONS
PUMY-P36NHMU(-BS)
Cooling Capacity Btu/h
*3
*3
*3
*3
*3
*3
*3
*3
36,000
Heating Capacity Btu/h
Btu/h/W
W/W
40,000
3.22
14.23/15.74
98.4
2.93
12.88/14.24
98.9
11.18
4.00
Input (Cool)kW
Input Current (Cool)
Power factor (Cool) A
%
%
Input (Heat)kW
Input Current (Heat)
Power factor (Heat) A
EER (Cool)
COP (Heat)
Connectable indoor units (Max.)6
Max. Connectable Capacity Btu/h 46,800(130%)
Power Supply Single phase ,60Hz ,208/230V
Breaker Size
Min.Circuit.Ampacity
Max. fuse size 30A 40A
26A
Sound level (Cool/Heat)dB 49 / 51
External finish Munsell 3Y 7.8/1.1
Refrigerant control Linear Expansion Valve
Compressor Hermetic
ANB33FDHMT
Model
Motor output kW 2.2
Starting method Inverter
Crankcase heater W —
Heat exchanger Plate fin coil (Anti corrosion fin treatment)
Fan Fan(drive)%No. Propeller fan %2
Fan motor output kW 0.086 + 0.086
Airflow m3/min [CFM] 100 [3,530]
Dimensions (HxWxD)Wmm
[in.]950 [37-13/32]
Dmm
[in.]330+30 [13+1-3/16)
Hmm
[in.]1,350 [53-5/32]
Weight kg [lbs]130 [287]
Refrigerant R410A
Charge kg [lbs]8.5 [18.7]
Protection High pressure protection HP switch
devices Compressor protection Discharge thermo,Over current detection
Fan motor protection Overheating/Voltage protection
Oil (Model)2.3 [73] (FV50S)
Total Piping length (Max.)m [ft]
L [oz]
120 [394]
Farthest m [ft] 80 [262]
Max Height difference m [ft] 30 [100]*1
Chargeless length m [ft] 50 [165]
Piping diameter Liquid :mm[inch] 9.52 [3/8]
Gas :mm[inch] 15.88 [5/8]
Guranteed operation range (cool)-5~ 46DB [23~115°F DB]*2
(heat)-18~ 15WB [0~60°F WB]
Item Service Ref.
Rating conditions
Cooling Indoor : D.B. 26.7°C / W.B. 19.4°C
[D.B. 80°F / W.B. 67°F]
Outdoor : D.B. 35°C[D.B. 95°F]
Heating Indoor : D.B. 21.1°C[D.B. 70°F]
Outdoor : D.B. 8.3°C / W.B. 6.1°C
[D.B. 47°F / W.B. 43°F]
Note.*1. 20m[70ft]:In case of installing outdoor unit lower than indoor unit.
*2. 10~46°C[50~115°F]DB:In case of connecting PKFY-P06/P08 type indoor unit.
*3. Electrical data is for only outdoor unit.
(In case of connecting 2 indoor units of PLFY-P18BM type)
Btu/h=kW × 3,412 CFM=K/min × 35.31 lbs=kg/ 0.4536
*Above specification data is subject to rounding variation.

11
PUMY-P48NHMU/NHMU1/NHMU2(-BS)
Cooling Capacity Btu/h
*3
*3
*3
*3
*3
*3
*3
*3
48,000
Heating Capacity Btu/h
Btu/h/W
W/W
54,000
Input (Cool)kW 4.97
Input Current (Cool)
Power factor (Cool) A
%
%
24.0/21.7
99.5
Input (Heat)kW 4.88
Input Current (Heat)
Power factor (Heat) A 23.6/21.3
99.5
EER (Cool)9.66
COP (Heat)3.24
Connectable indoor units (Max.)8
Max. Connectable Capacity Btu/h 62,400 (130%)
Power Supply Single phase ,60Hz ,208/230V
Breaker Size
Min.Circuit.Ampacity
Max. fuse size 30A 40A
26A
Sound level (Cool/Heat)dB 50 / 52
External finish Munsell 3Y 7.8/1.1
Refrigerant control Linear Expansion Valve
Compressor Hermetic
ANB33FDCMT(NHMU(1)), ANB33FDHMT(NHMU2)
Model
Motor output kW 2.4
Starting method Inverter
Crankcase heater W —
Heat exchanger Plate fin coil (Anti corrosion fin treatment)
Fan Fan(drive)%No. Propeller fan %2
Fan motor output kW 0.086 + 0.086
Airflow m3/min [CFM] 100 [3,530]
Dimensions (HxWxD)Wmm
[in.]950 [37-13/32]
Dmm
[in.]330+30 [13+1-3/16)
Hmm
[in.]1,350 [53-5/32]
Weight kg [lbs]130 [287]
Refrigerant R410A
Charge kg [lbs]8.5 [18.7]
Protection High pressure protection HP switch
devices Compressor protection Discharge thermo,Over current detection
Fan motor protection Overheating/Voltage protection
Oil (Model)2.3 [73] (MEL56/NHMU(1), FV50S/NHMU2)
Total Piping length (Max.)m [ft]
L [oz]
120 [394]
Farthest m [ft] 80 [262]
Max Height difference m [ft] 30 [100]*1
Chargeless length m [ft] 50 [165]
Piping diameter Liquid :mm[inch] 9.52 [3/8]
Gas :mm[inch] 15.88 [5/8]
Guranteed operation range (cool)-5~ 46DB [23~115°F DB]*2
(heat)-18~ 15WB [0~60°F WB]
Item Service Ref.
Rating conditions
Cooling Indoor : D.B. 26.7°C / W.B. 19.4°C
[D.B. 80°F / W.B. 67°F]
Outdoor : D.B. 35°C[D.B. 95°F]
Heating Indoor : D.B. 21.1°C[D.B. 70°F]
Outdoor : D.B. 8.3°C / W.B. 6.1°C
[D.B. 47°F / W.B. 43°F]
Note.*1. 20m[70ft]:In case of installing outdoor unit lower than indoor unit.
*2. 10~46°C[50~115°F]DB:In case of connecting PKFY-P06/P08 type indoor unit.
*3. Electrical data is for only outdoor unit.
(In case of connecting 2 indoor units of PLFY-P24BM type)
Btu/h=kW × 3,412 CFM=K/min × 35.31 lbs=kg/ 0.4536
*Above specification data is subject to rounding variation.

12
5 DATA
5-1. COOLING AND HEATING CAPACITY AND CHARACTERISTICS
5-1-1. Method for obtaining system cooling and heating capacity:
To obtain the system cooling and heating capacity and the electrical characteristics of the outdoor unit, first add up the ratings
of all the indoor units connected to the outdoor unit (see table below), and then use this total to find the standard capacity with
the help of the tables on 5-2.STANDARD CAPACITY DIAGRAM.
(1) Capacity of indoor unit
5-1-2. Method for obtaining the heating and cooling capacity of an indoor unit:
(1) The capacity of each indoor unit (Btu/h) = the capacity A(or B) o
(2) Sample calculation (using the system described above in 5-1-1. (2) ):
model capacity
total model capacity of all indoor units
During cooling: During heating:
• The total model capacity of the indoor unit is:
8000 o2 + 18000 o2=52000Btu/h
Therefore, the capacity of PKFY-P08NAMU-E and
PLFY-P18NLMU-E will be calculated as follows by
using the formula in 5-1-2. (1):
Model 08= 48,900o= 7,520 Btu/h
Model 18= 48,900o= 16,930 Btu/h
• The total model capacity of indoor unit is:
9000 o2 + 20000 o2=58000 Btu/h
Therefore, the capacity of PKFY-P08NAMU-E and
PLFY-P18NLMU-E will be calculated as follows by
using the formula in 5-1-2. (1):
Model 08=54,500 o= 8,460 Btu/h
Model 18= 54,500 o= 18,790 Btu/h
8000
52000
(2) Sample calculation
1System assembled from indoor and outdoor unit (in this example the total capacity of the indoor units is greater than that of
the outdoor unit)
• Outdoor unit PUMY-P48NHMU
• Indoor unit PKFY-P08NAMU-E o2 , PLFY-P18NLMU-E o2
2According to the conditions in 1, the total capacity of the indoor unit will be: 8 o2 + 18 o2 = 52
3The following figures are obtained from the 52 total capacity row of the standard capacity table (5-2.):
Model 06
Model Number for indoor unit
Model Capacity 6
Model 08
8
Model12
12
Model 15
15
Model 18
18
Model 24
24
Model 27
27
Model 30
30
Model 36
36
Model 48
48
Model 54
54
Cooling
A48,900
Heating
20.6
Cooling
21.9
Heating
4.71
Cooling
5.01
Heating
B54,500
Capacity (Btu/h) Outdoor unit power consumption (kW) Outdoor unit current (A)/230V
18000
52000
9000
58000
20000
58000

13
5-2. STANDARD CAPACITY DIAGRAM
* Before calculating the sum of total capacity of indoor units, please convert the value following the formula on 5-1-1.
5-2-1. PUMY-P36NHMU(-BS)
Note) In some combination patterns, numerical value of the heating data may differ slightly (CAPACITY : about several hun-
dred Btu/h)
Total capacity
of Indoor units* Cooling Heating Cooling Heating Cooling Heating Cooling Heating
Capacity(Btu/h)
Power Consumption(kW) Current(A)/230V Current(A)/208V
18 18,000 20,200 1.38 1.45 6.1 6.4 6.8 7.1
19 19,000 21,300 1.45 1.52 6.4 6.7 7.1 7.4
20 20,000 22,400 1.52 1.60 6.7 7.0 7.4 7.8
21 21,000 23,500 1.60 1.67 7.1 7.4 7.8 8.1
22 22,000 24,700 1.68 1.75 7.4 7.7 8.2 8.5
23 23,000 25,800 1.76 1.83 7.8 8.0 8.6 8.9
24 24,000 26,900 1.85 1.91 8.2 8.4 9.0 9.3
25 25,000 28,000 1.94 1.98 8.6 8.7 9.5 9.6
26 26,000 29,200 2.04 2.06 9.0 9.1 9.9 10.0
27 27,000 30,300 2.14 2.15 9.4 9.4 10.4 10.4
28 28,000 31,400 2.24 2.23 9.9 9.8 10.9 10.8
29 29,000 32,500 2.35 2.31 10.4 10.2 11.5 11.2
30 30,000 33,700 2.46 2.40 10.9 10.5 12.0 11.7
31 31,000 34,800 2.58 2.48 11.4 10.9 12.6 12.1
32 32,000 35,900 2.70 2.57 11.9 11.3 13.2 12.5
33 33,000 37,000 2.82 2.66 12.5 11.7 13.8 12.9
34 34,000 38,200 2.95 2.75 13.0 12.1 14.4 13.4
35 35,000 39,300 3.08 2.84 13.6 12.5 15.1 13.8
36 36,000 40,000 3.22 2.93 14.2 12.9 15.7 14.2
37 36,200 40,200 3.23 2.92 14.3 12.9 15.8 14.2
38 36,400 40,400 3.25 2.89 14.3 12.7 15.9 14.1
39 36,600 40,700 3.26 2.86 14.4 12.6 15.9 13.9
40 36,900 40,900 3.27 2.84 14.5 12.5 16.0 13.8
41 37,100 41,100 3.28 2.81 14.5 12.3 16.0 13.6
42 37,300 41,300 3.30 2.78 14.6 12.2 16.1 13.5
43 37,500 41,600 3.31 2.75 14.6 12.1 16.2 13.4
44 37,700 41,800 3.32 2.72 14.7 11.9 16.2 13.2
45 37,900 42,000 3.34 2.69 14.7 11.8 16.3 13.1
46 38,100 42,200 3.35 2.66 14.8 11.7 16.4 12.9

14
5-2-2. PUMY-P48NHMU/NHMU1/NHMU2(-BS)
Note) In some combination patterns, numerical value of the heating data may differ slightly (CAPACITY : about several hun-
dred Btu/h)
Total capacity
of Indoor units* Cooling Heating Cooling Heating Cooling Heating Cooling Heating
24 24,000 26,900 2.11 2.32 9.2 10.2 10.2 11.2
25 25,000 28,000 2.20 2.41 9.6 10.5 10.6 11.6
26 26,000 29,200 2.29 2.50 10.0 10.9 11.1 12.1
27 27,000 30,300 2.38 2.59 10.4 11.3 11.5 12.5
28 28,000 31,400 2.48 2.68 10.8 11.7 12.0 13.0
29 29,000 32,500 2.58 2.78 11.3 12.1 12.4 13.4
30 30,000 33,700 2.68 2.87 11.7 12.6 12.9 13.9
31 31,000 34,800 2.78 2.97 12.2 13.0 13.4 14.4
32 32,000 35,900 2.89 3.07 12.6 13.4 14.0 14.8
33 33,000 37,000 3.00 3.17 13.1 13.9 14.5 15.3
34 34,000 38,200 3.11 3.28 13.6 14.3 15.0 15.8
35 35,000 39,300 3.23 3.38 14.1 14.8 15.6 16.3
36 36,000 40,400 3.35 3.49 14.6 15.2 16.2 16.9
37 37,000 41,500 3.47 3.60 15.2 15.7 16.8 17.4
38 38,000 42,700 3.60 3.71 15.7 16.2 17.4 17.9
39 39,000 43,800 3.72 3.82 16.3 16.7 18.0 18.5
40 40,000 44,900 3.85 3.93 16.8 17.2 18.6 19.0
41 41,000 46,000 3.99 4.05 17.4 17.7 19.3 19.6
42 42,000 47,200 4.12 4.17 18.0 18.2 19.9 20.1
43 43,000 48,300 4.26 4.28 18.6 18.7 20.6 20.7
44 44,000 49,400 4.41 4.41 19.3 19.3 21.3 21.3
45 45,000 50,500 4.55 4.53 19.9 19.8 22.0 21.9
46 46,000 51,700 4.70 4.65 20.5 20.3 22.7 22.5
47 47,000 52,800 4.85 4.78 21.2 20.9 23.4 23.1
48 48,000 54,000 4.97 4.88 21.7 21.3 24.0 23.6
49 48,300 54,200 4.98 4.83 21.8 21.1 24.1 23.3
50 48,500 54,300 4.99 4.79 21.8 20.9 24.1 23.2
51 48,700 54,400 5.00 4.75 21.8 20.8 24.1 23.0
52 48,900 54,500 5.01 4.71 21.9 20.6 24.2 22.8
53 49,100 54,600 5.01 4.67 21.9 20.4 24.2 22.6
54 49,300 54,800 5.02 4.63 21.9 20.2 24.3 22.4
55 49,600 54,900 5.03 4.59 22.0 20.1 24.3 22.2
56 49,800 55,000 5.04 4.55 22.0 19.9 24.3 22.0
57 50,000 55,100 5.04 4.51 22.0 19.7 24.4 21.8
58 50,200 55,200 5.05 4.47 22.1 19.5 24.4 21.6
59 50,400 55,300 5.06 4.43 22.1 19.4 24.4 21.4
60 50,600 55,500 5.07 4.39 22.1 19.2 24.5 21.2
61 50,800 55,600 5.07 4.35 22.2 19.0 24.5 21.0
62 51,100 55,700 5.08 4.31 22.2 18.8 24.6 20.8
Capacity(Btu/h)
Power Consumption(kW) Current(A)/230V Current(A)/208V

15
5-3. CORRECTING COOLING AND HEATING CAPACITY
5-3-1. Correcting Changes in Air Conditions
(1)The performance curve charts (Figure 1, 2) show the ratio by the temperature condition change when the rated capacity (total
capacity) and the rated input are presumed 1, under standard length (7.6m [25ft]) and standerd temperature condition.
• Standard conditions:
• Use the rated input and rated power values given in the characteristics table for each indoor unit.
• The input is the single value of the outdoor unit; the input of each indoor unit must be added to obtain the total input.
(2)The capacity of each indoor unit may be obtained by multiplying the total capacity obtained in (1) by the ratio between the
individual capacity at the rated time and the total capacity at the rated time.
individual capacity at the rated time
Individual capacity under stated conditions = total capacity under the stated conditions ototal capacity at the rated time
Rated cooling capacity
Rated heating capacity
Indoor D.B. 26.7°C / W.B. 19.4°C [D.B.80°F / W.B.67°F]
Outdoor D.B. 35°C [D.B.95°F]
Indoor D.B. 21.1°C [D.B.70°F]
Outdoor D.B. 8.3°C / W.B. 6.1°C [D.B.47°F / W.B.43°F]
(3)Capacity correction factor curve
Figure 1. Cooling performance curve
0.4-5 0 10 20 30 40 46
23 32 50 68 86 104 115
0.6
0.8
1.0
1.2
1.4
0.6
0.8
1.0
1.2
1.4
22 (71.6)
20 (68)
18 (64.4)
16 (60.8)
22 (71.6)
20 (68)
18 (64.4)
16 (60.8)
°C DB
°F DB
0.6
0.4
0.8
1.0
1.2
1.4
0.4
0.6
0.8
1.0
1.2
1.4
-12
10
-18
0-10 14 -5 23 0 32 5 41 10 50 15 59°C WB
°F WB
21.1 (70)
25 (77)
15 (59)
21.1 (70)
25 (77)
15 (59)
Cooling capacity (ratio)
Cooling power consumption
(ratio) Heating power consumption (ratio)
Heating capacity (ratio)
INDOOR
INDOOR
INDOOR
INDOOR
Outdoor Outdoor
Figure 2. Heating performance curve
:WB(°FWB)
:WB(°FWB)
:DB(°FDB)
:DB(°FDB)

16
5-3-2. Correcting Capacity for Changes in the Length of Refrigerant Piping
• During cooling, to obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total
in-use indoor capacity, first find the capacity ratio corresponding to the standard piping length from Figure 3
at first, and then multiply by the cooling capacity from Figure 1 to obtain the actual capacity.
• During heating, to find the equivalent piping length, first find the capacity ratio corresponding to standard piping length
from Figure 3, and then multiply by the heating capacity from Figure 2 to obtain the actual capacity.
(2) Method for Obtaining the Equivalent Piping Length
Equivalent length for type P48 = (length of piping to farthest indoor unit) + (0.3 onumber of bends in the piping) (m)
Length of piping to farthest indoor unit: 80m [262ft]
5-3-3. Correction of Heating Capacity for Frost and Defrosting
If heating capacity has been reduced due to frost formation or defrosting, multiply the capacity by the appropriate correction
factor from the following table to obtain the actual heating capacity.
Correction factor diagram
43
6
1.0
14
-10
0.95
18
-8
0.95
21
-6
0.95
25
-4
0.9
28
-2
0.89
32
0
0.88
36
2
0.89
39
4
0.98
Outdoor Intake temperature (W.B.°F)
Outdoor Intake temperature (W.B.°C)
Correction factor
(1) Capacity CORRECTION CURVE (Figure 3)
Cooling
Heating
100
95
90
85
80
75
70 5 101520253035404550556065707580[m]
Cooling P36 model
Heating P36, 48 models
Cooling P48 model
Capacity ratio [%]
Corrected pipe length
[16] [33] [50] [70] [80] [100] [115] [130] [150] [165] [180] [195] [215] [230] [245] [260][ft]

17
1.5m
[4.9ft]
1m [3.3ft]
MICROPHONE
UNIT
GROUND
5-4. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUMY-P48NHMU(-BS)
PUMY-P48NHMU1(-BS)
PUMY-P48NHMU2(-BS)
COOLING
MODE
HEATING
50
SPL(dB)
52
LINE
PUMY-P36NHMU(-BS)
COOLING
MODE
HEATING
49
SPL(dB)
51
LINE

18
6OUTLINES AND DIMENSIONS
PUMY-P48NHMU
PUMY-P48NHMU-BS
PUMY-P48NHMU1
PUMY-P48NHMU1-BS
Unit : mm <inch>
Min.500mm <19-11/16>
Min.500mm
<19-11/16> Min.150mm <5-29/32>
Min.10mm<3/8>
Handle
Side Air Intake
Front piping cover
Rear piping cover
Air intake
Rear Air Intake
Handle
Service panel
Handle
31<1-7/32>
74<2-19/32>
40<1-9/16>
Max.
30mm<1-3/16>
The diagram below shows a basic example. Explantion of particular details is given in the installation manuals etc.
Dimensions of space needed for service access are shown in the below diagram.
<Foundation bolt height>
Please secure the unit firmly with 4 foundation (M10<W3/8>) bolts.(Bolts and washers must be purchased locally.)
Air Discharge
Rear Air Intake
Side Air Intake
……Refrigerant GAS pipe connction (FLARE):15.88 (5/8 inch) ……Refrigerant LIQUID pipe connection (FLARE):9.52 (3/8 inch) +1…..Indication of STOP VALVE connection location.
Example of Notes
Piping Knockout Hole Details
1 FREE SPACE (Around the unit) 2 SERVICE SPACE 3 FOUNDATION BOLTS
4 PIPING-WIRING DIRECTIONS
Piping and wiring connections can be made from 4 directions: front, right, rear and below.
1/2 Conduit attachment
2-W22<7/8>
When installing the conduit. Set the attachment to the inner side of each panel.
mm<inch>
FOUNDATION
Service space
Min.1000mm<39-3/8>
Min.10mm<3/8> Min.10mm<3/8>
FREE
Min.150mm<5-29/32>
Right trunking hole (Knockout)
45<1-25/32> 40<1-9/16>
65<2-9/16>
92<3-5/8>
27<1-1/16> 55<2-3/16>
23<29/32> 73<2-7/8>
63<2-1/2>
Rear piping hole (Knockout)
Rear trunking hole (Knockout)
Conduit hole (2-W27<1-1/16>Knockout)
W92
<3-5/8>
W92
<3-5/8>
19<3/4> 55<2-3/16>
92<3-5/8>
40<1-9/16>
73<2-7/8> 63<2-1/2>
23<29/32> 27<1-1/16>
92<3-5/8>
Conduit hole (2-W27<1-1/16>Knockout)
75 <2-31/32>
Right piping hole (Knockout)
45<1-25/32>
40<1-9/16>
55<2-3/16>
73<2-7/8>
27<1-1/16>
23<29/32>
65<2-9/16>
92<3-5/8>
Conduit hole (2-W27<1-1/16>Knockout)
Front trunking hole (Knockout)
Front piping hole (Knockout)
63
<2-1/2>
W92
<3-5/8>
30<1-3/16>
81<3-3/16> 219<8-5/8>
71<2-13/16>
71<2-13/16>
Bottom piping hole (Knockout)
Drain hole 5-W33<1-5/16>
220 <8-21/32> 145
<5-23/32>
145 <5-23/32>
145 <5-23/32>
Handle
600<23-5/8>
28<1-3/32> 370<14-9/16>
70<2-3/4>
56<2-7/32> 42<1-21/32>
56<2-7/32>
37<1-15/32>
19<3/4>
53<2-3/32>
417<16-13/32>
330<13>
175 <6-7/8>
175 <6-7/8>
2-12%36 Oval hole (Foundation Bolt M10<W3/8>)
2-U Shaped notched hole (Foundation Bolt M10<W3/8>)
30<1-3/16>
1088<42-27/32>
322<12-11/16>
635<25>371<14-19/32>
950<37-13/32>
23<29/32>
1350<53-5/32>
+1 423<16-21/32>
+1 507<19-31/32>
Handle
1
2
( )
Left …… For the power supply Center … For the transmission line Right…… For concentration control
Terminal block
Ground for the transmission line Ground for concentration control
Ground for the power supply ("GR"marking position)

19
PUMY-P36NHMU
PUMY-P36NHMU-BS
PUMY-P48NHMU2
PUMY-P48NHMU2-BS
Unit : mm <inch>
Min.500mm <19-11/16>
Min.500mm
<19-11/16> Min.150mm <5-29/32>
Min.10mm<3/8>
Handle
Side Air Intake
Front piping cover
Rear piping cover
Air intake
Rear Air Intake
Handle
Service panel
Handle
31<1-7/32>
74<2-19/32>
40<1-9/16>
Max.
30mm<1-3/16>
The diagram below shows a basic example. Explantion of particular details is given in the installation manuals etc.
Dimensions of space needed for service access are shown in the below diagram.
<Foundation bolt height>
Please secure the unit firmly with 4 foundation (M10<W3/8>) bolts.(Bolts and washers must be purchased locally.)
Air Discharge
Rear Air Intake
Side Air Intake
……Refrigerant GAS pipe connction (FLARE):15.88 (5/8 inch) ……Refrigerant LIQUID pipe connection (FLARE):9.52 (3/8 inch) +1…..Indication of STOP VALVE connection location.
Example of Notes
Piping Knockout Hole Details
1 FREE SPACE (Around the unit) 2 SERVICE SPACE 3 FOUNDATION BOLTS
4 PIPING-WIRING DIRECTIONS
Piping and wiring connections can be made from 4 directions: front,right,rear and below.
1/2 Conduit attachment
2-W22<7/8>
When installing the conduit. Set the attachment to the inner side of each panel.
mm<inch>
FOUNDATION
Service space
Min.1000mm<39-3/8>
Min.10mm<3/8> Min.10mm<3/8>
FREE
Min.150mm<5-29/32>
2-U Shaped notched hole (Foundation Bolt M10<W3/8>)
Conduit hole (2-W27<1-1/16>Knockout)
45<1-25/32>
Right trunking hole (Knockout)
45<1-25/32> 40<1-9/16>
65<2-9/16>
92<3-5/8>
27<1-1/16> 55<2-3/16>
23<29/32> 73<2-7/8>
63<2-1/2>
Rear piping hole (Knockout)
Rear trunking hole (Knockout)
Conduit hole (2-W27<1-1/16>Knockout)
W92
<3-5/8>
W92
<3-5/8>
19<3/4> 55<2-3/16>
92<3-5/8>
40<1-9/16>
73<2-7/8> 63<2-1/2>
23<29/32> 27<1-1/16>
92<3-5/8>
Conduit hole (2-W27<1-1/16>Knockout)
75 <2-31/32>
Right piping hole (Knockout)
40<1-9/16>
55<2-3/16>
73<2-7/8>
27<1-1/16>
23<29/32>
65<2-9/16>
92<3-5/8>
Front trunking hole (Knockout)
Front piping hole (Knockout)
63
<2-1/2>
W92
<3-5/8>
30<1-3/16>
81<3-3/16> 219<8-5/8>
71<2-13/16>
71<2-13/16>
Bottom piping hole (Knockout)
Drain hole 5-W33<1-5/16>
220 <8-21/32> 145
<5-23/32>
145 <5-23/32>
145 <5-23/32>
Handle
600<23-5/8>
28<1-3/32> 370<14-9/16>
70<2-3/4>
56<2-7/32> 42<1-21/32>
56<2-7/32>
37<1-15/32>
19<3/4>
53<2-3/32>
417<16-13/32>
330<13>
175 <6-7/8>
175 <6-7/8>
2-12%36 Oval hole (Foundation Bolt M10<W3/8>)
30<1-3/16>
1088<42-27/32>
322<12-11/16>
635<25>371<14-19/32>
950<37-13/32>
23<29/32>
1350<53-5/32>
+1 423<16-21/32>
+1 507<19-31/32>
Handle
1
2
( )
Left …… For the power supply Center … For the transmission line Right…… For concentration control
Terminal block
Ground for the transmission line Ground for concentration control
Ground for the power supply ("GR"marking position)

20
7WIRING DIAGRAM
PUMY-P48NHMU PUMY-P48NHMU-BS PUMY-P48NHMU1PUMY-P48NHMU1-BS
12345678
[Example]
When the compressor and
SV1 are turned during cooling
operation.
SYMBOL NAME SYMBOL NAMESYMBOL NAME
TB1 Terminal Block <Power Supply>
TB3 Terminal Block <Transmission>
TB7 Terminal Block <Contralized Control>
MC Motor for Compressor
MF1,MF2 Fan Motor
21S4 Solenoid Valve<Four way valve>
SV1 Solenoid Valve<Bypass valve>
TH3
Thermistor<Outdoor Pipe Temperature>
TH4 Thermistor<Discharge Temperature>
TH6
Thermistor<Low Pressure Saturated Temperature>
TH7 Thermistor<Outdoor Temperature>
TH8 Thermistor<Heatsink>
63HS
High Pressure Sensor<Discharge Pressure>
63H High Pressure Switch
63L Low Pressure Switch
CB Main Smoothing Capacitor
ACTM
DCL
Active filter Module
RS Rush Current Protect Resistor
P.B. Power Circuit Board
Connection Terminal<U/V/W-Phase>
U/V/W
MULTI.B. Multi Controller Board
Fuse<6.3A>
F1,F2 Fuse<3A>
F500 Switch<Display Selection>
SW1 Switch<Function Selection>
SW2 Switch<Test Run>
SW3 Switch<Model Selection>
SW4 Switch<Function Selection>
SW5 Switch<Function Selection>
SW6 Switch<Function Selection>
SW7 Switch<Function Selection>
SW8
Switch<Unit Address Selection, 1s digit>
SWU1
Switch<Unit Address Selection, 10ths digit>
SWU2 Transfomer
TRANS
Digital Indicator<Operation Inspection Display>
LED1,2
LED<Power Supply to Main Microcomputer>
LED3 Connector<Multi System>
CNS1 Connector<Centralized Cotrol>
CNS2
Connector<To Noise Filter Circuit Board>
CNAC Connector<Power circuit board>
CNDC Connector<To Power Circuit Board>
CN2 Connector<To Power Circuit Board>
CN4
Connector<Centralized Cotrol Power Supply>
CN40
Connector<For storing Jumper Connector>
CN41 Connector<Thermistor>
TH3 Connector<Thermistor>
TH4 Connector<Thermistor>
TH7/6 Connector<High Pressure Sensor>
63HS Connector<High Pressure Switch>
63H Connector<Low Pressure Switch>
63L Connector<Fan Motor>
CNF1,CNF2
Connector<Four-way Valve>
21S4 Connector<Bypass Valve>
SV1 Connector<For Option>
SS Connector<For Option>
CN3D Connector<For Option>
CN3S Connector<For Option>
CN3N Connector<For Option>
CN51 Relay
X501~505
M-P.B.
Connector<To Noise Filter Circuit Board>
Transmission Power Board
CN1 Connector<To Multi Controller Board>
CN2
Terminal<L/N-Phase>
TAB-S/T
Terminal<DCVoltage>
TAB-P/P1/P2
Terminal<DCVoltage>
TAB-N/N1/N2
Connector
CN2~5
N.F. Noise Filter Circuit Board
Connection Lead<L-Phase>
LI/LO Connection Lead<N-Phase>
NI/NO
Connection Terminal<Ground>
EI
Connector
CNAC1/2 Connector
CN5
Connector
CNDC Connector
CNAF Inverter
IPM
Light Emitting Diodes <Inverter Control Status>
LED1
Reactor
Bit
Indication
1
Compressor
operated
2
52C
3
21S4
4
SV1
5
(SV2)
6
–
7
–
8
Always lit
During normal operation
The LED indicates the drive state of the controller in the outdoor unit.
When fault requiring inspection has occurred
The LED alternately indicates the inspection code and the location of the unit in which
the fault has occurred.
Use copper supply wires.
NOTES:
1.Refer to the wiring diagrams of the indoor units for details on wiring of each indoor unit.
Self-diagnosis function
The indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch
(SW1) and LED1, LED2 (LED indication) found on the multi-controller of the outdoor unit.
LED indication : Set all contacts of SW1 to OFF.
Cautions when Servicing
Caution for electrical work
!
WARNING: When the main supply is turned off, the voltage [340 V] in the main capacitor will drop to 20 V in approx. 2
minutes (input voltage: 240 V). When servicing, make sure that LED1, LED2 on the outdoor circuit board goes out, and then
wait for at least 1 minute.
Components other than the outdoor board may be faulty: Check and take corrective action, referring to the service manual.
Do not replace the outdoor board without checking.