Mitsubishi Electric PUHZ-SW75VHA User manual

SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL.................................. 2
2. SAFETY PRECAUTION..................................3
3. FEATURES......................................................7
4. SPECIFICATIONS...........................................8
5. DATA............................................................. 11
6. OUTLINES AND DIMENSIONS.................... 13
7. WIRING DIAGRAM.......................................15
8. WIRING SPECIFICATIONS..........................18
9.
REFRIGERANT SYSTEM DIAGRAM............... 19
10. TROUBLESHOOTING...................................21
11. DISASSEMBLY PROCEDURE..................... 65
No.OCH533
REVISED EDITION-A
SPLIT-TYPE, AIR TO WATER HEAT PUMP
R410A
October 2012
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
Salt proof model
PUHZ-SW75VHA-BS
PUHZ-SW100VHA-BS
PUHZ-SW100YHA-BS
PUHZ-SW120VHA-BS
PUHZ-SW120YHA-BS
Note:
• This manual describes
only service data of the
outdoor units.
PUHZ-SW75VHA-BS.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW100YHA-BS.UK
PUHZ-SW120VHA-BS.UK
PUHZ-SW120YHA-BS.UK
Outdoor unit
[Model names]
PUHZ-SW75VHA
PUHZ-SW100VHA
PUHZ-SW100YHA
PUHZ-SW120VHA
PUHZ-SW120YHA
[Service ref.]
PUHZ-SW75VHA.UK
PUHZ-SW100VHA.UK
PUHZ-SW100YHA.UK
PUHZ-SW120VHA.UK
PUHZ-SW120YHA.UK
PARTS CATALOG (OCB533)
Revision:
• The function description of
SW7-3, 7-4 and 7-5 (Page
52) have been corrected in
REVISED EDITION-A.
•Please void OCH533.

2
1REFERENCE MANUAL
INDOOR UNIT SERVICE MANUAL
Model name Service ref. Service manual No.
EHST20C-VM6HB
EHST20C-YM9HB
EHST20C-VM6B
EHST20C-YM9B
EHST20C-VM6EB
EHST20C-YM9EB
EHST20C-VM6SB
EHPT20X-VM2HB
EHPT20X-VM6HB
EHPT20X-YM9HB
EHPT20X-VM6B
EHPT20X-YM9B
EHST20C-VM6HB.UK
EHST20C-YM9HB.UK
EHST20C-VM6B.UK
EHST20C-YM9B.UK
EHST20C-VM6EB.UK
EHST20C-YM9EB.UK
EHST20C-VM6SB.UK
EHPT20X-VM2HB.UK
EHPT20X-VM6HB.UK
EHPT20X-YM9HB.UK
EHPT20X-VM6B.UK
EHPT20X-YM9B.UK
OCH531
EHSC-VM6B
EHSC-YM9B
EHSC-VM6EB
EHSC-YM9EB
EHPX-VM2B
EHPX-VM6B
EHPX-YM9B
ERSC-VM2B
EHSC-VM6B.UK
EHSC-YM9B.UK
EHSC-VM6EB.UK
EHSC-YM9EB.UK
EHPX-VM2B.UK
EHPX-VM6B.UK
EHPX-YM9B.UK
ERSC-VM2B.UK
OCH532
OCH533A

3
2SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
2-2. 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 indoors, and 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.
In case of using the existing pipes for R22, be careful with
the followings.
· Be sure to perform replacement operation before test run.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
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.
Handle 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.
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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must disconnected.
Preparation before the repair service.
• Prepare the proper tools.
• Prepare the proper protectors.
• Provide adequate ventilation.
• After stopping the operation of the air conditioner, turn off
the power-supply breaker.
• Discharge the condenser before the work involving
the electric parts.
Precautions during the repair service.
• Do not perform the work involving the electric parts
with wet hands.
• Do not pour water into the electric parts.
• Do not touch the refrigerant.
• Do not touch the hot or cold areas in the refrigerating cycle.
• When the repair or the inspection of the circuit needs to be
done without turning off the power,
exercise great caution not to touch the live parts.
OCH533A

4
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. (UNF1/2)
·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
[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.)
OCH533A

5
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
Flowchart
Perform the airtight test, vacuum air purging,
additional refrigerant charging (if necessary),
and gas leak check.
• Refer to the flowchart below to determine if the existing pipes can be used and if it is necessary to use a filter dryer.
• If the diameter of the existing pipes is different from the specified diameter, refer to technological data materials to confirm if the pipes can be used.
▼
▼
▼
▼
▼
▼ ▼
Measure the existing pipe thickness and
check for damage.
The existing pipe thickness meets specifica-
tions and the pipes are not damaged.
Check if the existing outdoor unit can operate.
After operating the cooling system for about 30
minutes, do a pump down work.
Disconnect the existing outdoor unit from the
pipes.
Attach the new outdoor unit
Test run
* Refer to 10-2. TEST POINT UNDER TEST RUN.
The existing pipes cannot be reused.
Use new pipes.
* If the existing outdoor unit cannot operate, use
a refrigerant recovery device to collect the refrigerant.
Use new pipes for SW75, SW100 and SW120 models.
The existing pipe thickness does not meet
specifications or the pipes are damaged.
2-4. 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.
OCH533A

6
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 times 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 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 refrig-
erants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A has been
specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A
also has 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
0.8
0.8
1.0
—
0.8
0.8
0.8
1.0
1.0
Nominal
dimensions(inch)
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness (mm)
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
9.1
13.2
16.6
19.7
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions(inch)
Flare cutting dimensions
Outside
diameter Dimension A ( )
+0
-0.4
(mm)
R410A R22 1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
17.0
22.0
26.0
29.0
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions(inch)
Flare nut dimensions Outside
diameter Dimension B (mm)
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 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:
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
OCH533A

7
3 FEATURES
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
(Max. 10m (PUHZ-SW75-120))
The refrigerant circuit with LEV (Linear Expansion Valve) and Accumulator always control the optimal refrigerant level regardless
of the length (10m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes prob-
lems. Heretofore it is completely eliminated. This unique system improves the quality and reliability of the work done. It also helps
to speed up the installation time.
PUHZ-SW100VHA.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW100YHA.UK
PUHZ-SW100YHA-BS.UK
PUHZ-SW120VHA.UK
PUHZ-SW120VHA-BS.UK
PUHZ-SW120YHA.UK
PUHZ-SW120YHA-BS.UK
OCH533A

8
4 SPECIFICATIONS
<Reference data> Plate heat exchanger (ACH70-40 plates)
Nominal water flow L/min 22.9
Heating
(A7/W35) Capacity kW 8.00
COP 4.40
Power input kW 1.82
Heating
(A7/W45) Capacity kW 8.00
COP 3.40
Power input kW 2.35
Heating
(A2/W35) Capacity kW 7.50
COP 3.40
Power input kW 2.20
Heating
(A2/W45) Capacity kW 7.50
COP 2.83
Power input kW 2.65
Nominal water flow L/min 18.9
Cooling
(A35/W7) Capacity kW 6.60
EER 2.55
Power input kW 2.59
Cooling
(A35/W18) Capacity kW 7.10
EER 4.01
Power input kW 1.77
Rating conditions
Nominal operating condition
Heating (A7/W35)
Outside air temperature (Dry-bulb) + 7 °C
Outside air temperature (Wet-bulb) + 6 °C
Water temperature (inlet/outlet) + 30 °C/+ 35 °C
Heating (A7/W45)
Outside air temperature (Dry-bulb) + 7 °C
Outside air temperature (Wet-bulb) + 6 °C
Water temperature (inlet/outlet) + 40 °C/+ 45 °C
Heating (A2/W35)
Outside air temperature (Dry-bulb) + 2 °C
Outside air temperature (Wet-bulb) + 1 °C
Water temperature (inlet/outlet) + 30 °C/+ 35 °C
Heating (A2/W45)
Outside air temperature (Dry-bulb) + 2 °C
Outside air temperature (Wet-bulb) + 1 °C
Water temperature (inlet/outlet) + 40 °C/+ 45 °C
Cooling (A35/W7)
Outside air temperature (Dry-bulb) + 35 °C
Outside air temperature (Wet-bulb) + 24 °C
Water temperature (inlet/outlet) + 12 °C/+ 7 °C
Cooling (A35/W18)
Outside air temperature (Dry-bulb) + 35 °C
Outside air temperature (Wet-bulb) + 24 °C
Water temperature (inlet/outlet) + 23 °C/+ 18 °C
Note: "COP" and "Power input" in the above table are values
that does NOT contains the "pump input (based on EN 14511)".
Nominal water flow L/min 32.1
Heating
(A7/W35) Capacity kW 11.2
COP 4.45
Power input kW 2.51
Heating
(A7/W45) Capacity kW 11.2
COP 3.42
Power input kW 3.27
Heating
(A2/W35) Capacity kW 10.0
COP 3.32
Power input kW 3.02
Heating
(A2/W45) Capacity kW 10.0
COP 2.66
Power input kW 3.76
Nominal water flow L/min 26.1
Cooling
(A35/W7) Capacity kW 9.10
EER 2.75
Power input kW 3.31
Cooling
(A35/W18) Capacity kW 10.0
EER 4.35
Power input kW 2.30
(SW75)
(SW100)
Nominal water flow L/min 45.9
Heating
(A7/W35) Capacity kW 16.0
COP 4.10
Power input kW 3.90
Heating
(A7/W45) Capacity kW 16.0
COP 3.23
Power input kW 4.95
Heating
(A2/W35) Capacity kW 12.0
COP 3.24
Power input kW 3.70
Heating
(A2/W45) Capacity kW 12.0
COP 2.52
Power input kW 4.76
Nominal water flow L/min 35.8
Cooling
(A35/W7) Capacity kW 12.5
EER 2.32
Power input kW 5.38
Cooling
(A35/W18) Capacity kW 14.0
EER 4.08
Power input kW 3.43
(SW120)
OCH533A

9
A
kW
W
kW
*
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUHZ-SW75VHA-BS.UK
PUHZ-SW75VHA.UK
TNB220FLHMT
Propeller fan %1
0.074
55(1,940)
48
51
943(37-1/8)
75(165)
3.2(7.0)
0.87(FV50S)
Max. 40m
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Reverse cycle
950(37-3/8)
330+30(13+1-3/16)
R410A
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 10m
HP switch
Comp. surface thermo
Discharge thermo
Over current detection
Single, 50Hz, 230V
OUTDOOR UNIT
REFRIGERANT PIPING
1.3
19
A
kW
W
kW
*
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUHZ-SW100VHA-BS.UK
50
54
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Propeller fan %2
0.060+0.060
100(3,530)
Reverse cycle
950(37-3/8)
330+30(13+1-3/16)
1,350(53-1/8)
118(260)
R410A
4.6(10.1)
1.40(FV50S)
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 30m
Max. 75m
29.5
HP switch
LP switch
Discharge thermo
Comp. surface thermo
Over current detection
Single 50Hz, 230V
OUTDOOR UNIT
REFRIGERANT PIPING
51
54
ANB42FNEMT
2.5
ANB33FNEMT
2.5
PUHZ-SW120VHA-BS.UK
PUHZ-SW100VHA.UK PUHZ-SW120VHA.UK
OCH533A

10
3 phase, 50Hz, 400V
13
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Propeller fan %2
0.060+0.060
100(3,530)
Reverse cycle
950(37-3/8)
330+30(13+1-3/16)
1,350(53-1/8)
130(287)
R410A
4.6(10.1)
1.40(FV50S)
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 30m
Max. 75m
PUHZ-SW100YHA-BS.UK PUHZ-SW120YHA-BS.UK
PUHZ-SW100YHA.UK PUHZ-SW120YHA
A
kW
W
kW
*
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref.
OUTDOOR UNIT
REFRIGERANT PIPING
ANB33FNDMT
2.5 ANB42FNDMT
2.5
HP switch
LP switch
Discharge thermo
Comp.surface thermo
Over current detection
49
51 50
52
OCH533A

11
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A : kg)
5-2. COMPRESSOR TECHNICAL DATA
Service Ref. Piping length (one way) Initial
charged
10m 20m 30m 40m 50m 60m 75m
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK 3.2 3.6 4.0 4.6 — — — 3.2
PUHZ-SW100VHA.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW100YHA.UK
PUHZ-SW100YHA-BS.UK
4.6 4.8 5.0 5.6 6.2 6.8 7.5 4.6
PUHZ-SW120VHA.UK
PUHZ-SW120VHA-BS.UK
PUHZ-SW120YHA.UK
PUHZ-SW120YHA-BS.UK
4.6 4.8 5.0 5.6 6.2 6.8 7.5 4.6
U-V
U-W
W-V
Service Ref.
Compressor model
Winding
Resistance
()
ANB33FNEMT
(at 20°C)
0.19
0.19
0.19
PUHZ-SW100VHA.UK
PUHZ-SW100VHA-BS.UK
ANB33FNDMT
0.30
0.30
0.30
ANB42FNDMTANB42FNEMT
0.30
0.30
0.30
PUHZ-SW100YHA.UK
PUHZ-SW100YHA-BS.UK
TNB220FLHMT
0.88
0.88
0.88
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK PUHZ-SW120YHA.UK
PUHZ-SW120YHA-BS.UK
PUHZ-SW120VHA.UK
PUHZ-SW120VHA-BS.UK
0.19
0.19
0.19
Additional charge is required for pipes
longer than 10 m.
OCH533A

12
5-3. NOISE CRITERION CURVES
1.5m
1m
MICROPHONE
UNIT
GROUND
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
COOLING
MODE
HEATING
48
SPL(dB)
51
LINE
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)
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SW100VHA.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW100YHA.UK
PUHZ-SW100YHA-BS.UK
COOLING
MODE
HEATING
50
SPL(dB)
54
LINE
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)
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SW120VHA.UK
PUHZ-SW120VHA-BS.UK
PUHZ-SW120YHA.UK
PUHZ-SW120YHA-BS.UK
COOLING
MODE
HEATING
51
SPL(dB)
54
LINE
OCH533A

13
6OUTLINES AND DIMENSIONS
Unit : mm
Air Intake
Rear Air Intake
Handle for moving
Handle for moving
322
950
473 943
23
*1 447
*1 431
673
2
1
Handle for moving
Handle for moving Service panel
Earth terminal
Left···Power supply wiring Right···Indoor/Outdoor wiring
Terminal Connections
Rear piping cover
Front piping cover
Side Air Intake
Handle for moving
40
54
28 370 19
417
53
57 41
600 175175
330
Rear Air Intake
Air Discharge
Side Air Intake Installation Feet
2-U Shaped notched holes (Foundation Bolt M10)
2-12 %36 oval holes (Foundation Bolt M10)
30
220 145 145 14530
81 219
71
71
Bottom piping hole (Knockout)
Drain hole (5-:33)
Piping Knockout Hole Details
19 55
23 27 92
92
4075
73 63
Right piping hole (Knockout) Right trunking hole
(Knockout)
Power supply wiring hole (2-:27Knockout)
:92
27 55
7323 63
40
92 65
45
Front piping hole (Knockout)
Front trunking hole (Knockout)
Power supply wiring hole (2-:27Knockout)
:92
4045
65
92
27 55
23 73 63
Rear piping hole (Knockout)
Rear trunking hole (Knockout)
Power supply wiring hole (2-:27Knockout)
:92
Example of Notes
Refrigerant GAS pipe connection (FLARE):15.88(5/8 inch) Refrigerant LIQUID pipe connection (FLARE):9.52(3/8 inch) *1...Indication of STOP VALVE connection location.
Over
Over
Less than
Piping and wiring connections can be made from 4 directions: front, right, rear and below.
4 PIPING-WIRING DIRECTIONS
3 FOUNDATION BOLTS2 SERVICE SPACE
1 FREE SPACE (Around the unit)
The diagram below shows a basic example. Explanation of particular details is given in the installation manuals etc.
Over10
500
500
Over100
Dimensions of space needed for service access are shown in the below diagram.
Service space
30
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)
<Foundation bolt height>
FOUNDATION
over 100mm
over 500mm
over 10mm
FREE
over 10mm
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
OCH533A

14
Handle for moving
Side Air Intake
Front piping cover
Rear piping cover
Air intake
Rear Air Intake
Handle for moving
Handle for moving
Terminal connection
Left···Power supply wiring Right···Indoor/Outdoor wiring
Earth terminal
Service panel
Handle for moving
1
2
Air Discharge
Rear Air Intake
Side Air Intake
····Refrigerant GAS pipe connction (FLARE)W15.88(5/8 inch) ····Refrigerant LIQUID pipe connection (FLARE)W9.52(3/8 inch)
*1 ···Indication of STOP VALVE connection location.
Example of Notes
Piping Knockout Hole Details
600175 175
330
417
42
66
53 56
45
(19)
28 370
2-U Shaped notched holes (Foundation Bolt M10)
2-12 x 36 Oval holes (Foundation Bolt M10)
Installation Feet
30
45 40
65 92
27 55
23 73 63
Rear piping hole (Knockout)
Rear trunking hole (Knockout)
Power supply wiring hole (2-
W
27Knockout)
W
92
19 55
92
75 40
73 63
23 27 92
Right piping hole (Knockout) Right trunking hole
(Knockout)
Power supply wiring hole (2-
W
27Knockout)
W
92
92 65
4540
27 55
23 73 63
Front piping hole (Knockout)
Front trunking hole (Knockout)
Power supply wiring hole (2-
W
27Knockout)
W
92
14514522030 145
81 219
71
71
Bottom piping hole (Knockout)
Drain hole (5-W33)
1350
23
950
A
*1 447
*1 431
371 635
322
Handle for moving
VHA YHA
1,079
A
930
Unit : mm
Over
Over
Over
Over
Less than
Piping and wiring connections can be made from 4 directions: front, right, rear and below.
4 PIPING-WIRING DIRECTIONS
3 FOUNDATION BOLTS2 SERVICE SPACE
1 FREE SPACE (Around the unit)
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)
<Foundation bolt height>
Dimensions of space needed for service access are shown in the below diagram.
The diagram below shows a basic example. Explantion of particular details is given in the installation manuals etc.
30
FOUNDATION
10
500
500 150
Service space
FREE
Over 10mm
Over 10mm
Over 150mm
Over 1000mm
PUHZ-SW100VHA.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW100YHA.UK
PUHZ-SW100YHA-BS.UK
PUHZ-SW120VHA.UK
PUHZ-SW120VHA-BS.UK
PUHZ-SW120YHA.UK
PUHZ-SW120YHA-BS.UK
OCH533A

15
7WIRING DIAGRAM
12345678
OFF
ON
75V
MODEL SW6
*1 MODEL SELECT
The black square ( ) indicates a switch position.
SW5-6 *2
OFF
ON
123456
*2SW5 -1 to 5 : Function Switch
SYMBOL NAME SYMBOL NAME SYMBOL NAME
TB1
MC
MF1
21S4
63H
63HS
TH3
TH4
TH6
TH7
TH8
TH34
LEV-A, LEV-B
ACL
CY1, CY2
Terminal Block <Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
High Pressure Sensor
Thermistor <Liquid>
Thermistor <Discharge>
Thermistor <2-Phase Pipe>
Thermistor <Ambient>
Thermistor <Heat Sink>
Thermistor <Comp. Surface>
Linear Expansion Valve
Reactor
Capacitor
P.B.
N.F.
C.B.
Power Circuit Board
Connection Terminal <L/N-Phase>
Connection Terminal <U/V/W-Phase>
Power Module
Converter
Main Smoothing Capacitor
Noise Filter Circuit Board
Connection Terminal <L-Phase>
Connection Terminal <N-Phase>
Connection Terminal <Ground>
52C Relay
Controller Circuit Board
Switch <Manual Defrost, Defect History,
Record Reset, Refrigerant Address>
Switch <Test Operation>
R, S
U, V, W
IPM
PFC
CB1, CB2, CB3
LI, LO
NI, NO
EI, E2, E3
52C
SW1
SW4
SW5
SW6
SW7
SW8
SW9
SWP
CN31
CNDM
CN51
SV1/CH
SS
CNM
LED1, LED2
F1, F2, F3, F4
X51, X52, X54
Switch <Function Switch, Model Select>
Switch <Model Select>
Switch <Function Switch>
Switch <Function Switch>
Switch <Function Switch>
Switch <Pump Down>
Connector <Emergency Operation>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
LED <Operation Inspection Indicators>
Fuse <T6.3AL250V>
Relay
C. B.
P. B.
TH8
TH6TH7 TH4TH3
U
CB3
N. F.
21S4
LNS1S2S3
INDOOR
UNIT
POWER SUPPLY
~/N 230V 50Hz
TB1
V
W
5
2
2
2
2
RED
WHT
BLK
t° t° t° t° t°
t°
MC
CN5
(RED)
CNAC2
(RED)
CNAC1
(WHT)
LO NO
LI NI EI
CN52C
(BLK)
3
1
1
3
2
1
1
2
52C
CN2
(WHT)
CN3
(WHT)
CN5
(RED)
CN4
(WHT)
1
7
1
2
1
2
2
1
LEV-A
CNS
(WHT)
CNAC
(WHT)
CNDC
(PNK)
F2
F1
F3
F4 21S4
(GRN)
CN2
(WHT)
CN4
(WHT)
CN3S
(WHT)
TH7/6
(RED) TH3
(WHT) TH4 (WHT)
TRANS
CNVMNT
(WHT) CNMNT (WHT)
CNM
(WHT)
LED1
LED2
X52
SV1
/CH
(GRY)
X54
63H
(YLW)
CN52C
(RED)
2
5
2
141221
13
311 5
1
14
1
3
13
12
17
3
1
13
12
34 31 31
LEV-A
(WHT)
51
MS
3~
CB2CB1
R
S
U
V
W
PFC
IPM
ACL
E3E2
RED
BLU
RED
WHT
RED
WHT
YLW
ORN
BRN
RED
WHT
RED
WHT
CY1
CY2
GRN/YLW
SS
(WHT)
X51
31
MS
3~
MF1 CNF1
(WHT)
17
63H
31
TH34
21
TH34
(RED)
63HS
(WHT)
63HS
LEV-B
(RED)
M
LEV-B
51
M
CNDM
(WHT)
CN51
(WHT)
1
3
1
5
CNF2
(WHT)
1763L
(RED)
13
+++
SW7
SW6SW1
SW9
CN31
*
1
*
1
SW5SW8SW4SWP
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
OCH533A

16
PUHZ-SW100VHA.UK PUHZ-SW120VHA.UK
PUHZ-SW100VHA-BS.UK PUHZ-SW120VHA-BS.UK
100V
120V
SYMBOL NAME SYMBOL NAME SYMBOL NAME
TB1
MC
MF1, MF2
21S4
63H
63L
63HS
TH3
TH4
TH6
TH7
TH8
TH34
LEV-A, LEV-B
DCL
CB
CY1, CY2
Terminal Block <Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
Low Pressure Switch
High Pressure Sensor
Thermistor <Liquid>
Thermistor <Discharge>
Thermistor <2-Phase Pipe>
Thermistor <Ambient>
Thermistor (internal) <Heat Sink>
Thermistor <Comp. Surface>
Linear Expansion Valve
Reactor
Main Smoothing Capacitor
Capacitor
P. B. Power Circuit Board
Connection Terminal <U/V/W-Phase>
Connection Terminal <L-Phase>
Connection Terminal <N-Phase>
Connection Terminal
Connection Terminal
Connection Terminal <Reactor>
Power Module
Connection Terminal <Ground>
52C Relay
Controller Circuit Board
Switch <Manual Defrost, Defect History,
Record Reset, Refrigerant Address>
Switch <Test Operation>
Switch <Function Switch, Model Select>
Switch <Model Select>
SW7
SW8
SW9
SWP
CN31
CNDM
CN51
SV1/CH
SS
CNM
LED1, LED2
F1, F2, F3, F4
X51, X52, X54
Switch <Function Switch>
Switch <Function Switch>
Switch <Function Switch>
Switch <Pump Down>
Connector <Emergency Operation>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
LED <Operation Inspection Indicators>
Fuse <T6.3AL250V>
Relay
U, V, W
LI
NI
P2
N2
DCL1, DCL2
IGBT
EI, E2, E3, E4
52C
C. B.
SW1
SW4
SW5
SW6
POWER SUPPLY
~/N 230V 50Hz
INDOOR
UNIT
P. B.
W
DCL
CB
L N S1 S2 S3 TB1
VU
2
RED
WHT
BLK
MC
CN2
(WHT)
CN4
(WHT)
17
21
31
RED
BLU
YLW
ORN
BRN
WHT
RED
GRN/YLW
BLK
(RED)
CNAC2
(WHT)
CNAC1
LINI
EI
E3
CN52C
(RED)
3
1
1
3
52C
52C
13
DCL1
DCL2
+
P2
N2
+
-
UVW
CNDC
(PNK)
+
BLK
2
MS
3~
E2
BLK
E4
BLK
CY1
CY2
IGBT
RED
WHT
C. B.
TH6TH7 TH4TH3
21S4
t° t° t° t°
LEV-A
CNS
(WHT)
CNAC
(WHT)
CNDC
(PNK)
F2
F1
F3
F4 21S4
(GRN)
CN2
(WHT)
CN4
(WHT)
TH7/6
(RED) TH3 (WHT) TH4 (WHT)
TRANS
CNVMNT
(WHT) CNMNT (WHT)
CNM
(WHT)
LED1
LED2
X52
SV1
/CH
(GRY)
X54
63H
(YLW)
2
7
141221
13
311 5
114
12
17
3
1
13
12
34 31 31
LEV-A
(WHT)
51
SS
(WHT)
X51
31
MS
3~
MF1 17
63L63H
63L
(RED)
13
31
TH34
t°
21
TH34
(RED)
63HS
(WHT)
63HS
LEV-B
(RED)
M
LEV-B
51
M
MF2 CNF2
(WHT)
CNF1
(WHT)
17
2
7
CN52C
(RED)
3
13
3
t°TH8
CN3S
(WHT)
1
3
CNDM
(WHT)
CN51
(WHT)
1
3
1
5
~
~
MS
3~
12345678
OFF
ON
MODEL
SW6 SW5-6 *2
OFF
ON
123456
12345678
OFF
ON OFF ON
123456
*2 SW5 -1 to 5 : Function Switch
SW7
SW6SW1
SW9
CN31
*
1
*
1
SW5SW8SW4SWP
*1 MODEL SELECT
The black square ( ) indicates a switch position.
OCH533A

17
TB1
TB2
MC
MF1, MF2
21S4
63H
63L
63HS
TH3
TH4
TH6
TH7
TH8
TH34
LEV-A, LEV-B
ACL1, ACL2, ACL3, ACL4
CY1, CY2
CK
RS
Terminal Block <Power Supply>
Terminal Block <Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
Low Pressure Switch
High Pressure Sensor
Thermistor <Liquid>
Thermistor <Discharge>
Thermistor <2-Phase Pipe>
Thermistor <Ambient>
Thermistor <Heat Sink>
Thermistor <Comp. Surface>
Linear Expansion Valve
Reactor
Capacitor
Capacitor
Rush Current Protect Resistor
Power Circuit Board
Connection Terminal <U/V/W-Phase>
P. B.
TB-U/V/W
Noise Filter Circuit Board
Connection Terminal
<L1/L2/L3/N-Power Supply >
N. F.
LI1/LI2/LI3/NI
Connection Terminal <L1/L2/L3/N-Power Supply >
LO1/LO2/LO3/NO
Converter Circuit Board
CONV. B.
Connection Terminal <Ground> GD1, GD3
Connection Terminal <L1-Power Supply> L1-A1/IN
Connection Terminal <L1-Power Supply> L1-A2/OU
Connection Terminal <L2-Power Supply> L2-A2/OU
Connection Terminal <L3-Power Supply> L3-A2/OU
Connection Terminal N-IN
Connection Terminal CK-OU
SYMBOL NAME SYMBOL NAME SYMBOL NAME
Connection Terminal <L1/L2/L3-Power Supply >
TB-L1/L2/L3
SW4
SW5
SW6
SW7
SW8
SW9
SWP
CN31
CNDM
CN51
SV1/CH
SS
CNM
LED1, LED2
F1, F2, F3, F4
X51, X52, X54
SW1
C. B.
Connection Terminal
TB-N
52C Relay
X52CA
Switch <Manual Defrost, Defect History,
Record Reset, Refrigerant Address>
Switch <Test Operation>
Switch <Function Switch, Model Select>
Switch <Model Select>
Switch <Function Switch>
Switch <Function Switch>
Switch <Function Switch>
Switch <Pump Down>
Connector <Emergency Operation>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
LED <Operation Inspection Indicators>
FUSE <T6.3AL250V>
Relay
Controller Circuit Board
12345678
12345678
OFF
ON
100Y
MODEL SW6 SW5-6
*
2
OFF
ON
OFF
ON
120Y
OFF
ON
123456
123456
*2 SW5 -1 to 5 : Function Switch
P. B.
U
POWER
SUPPLY
3N~
400V 50Hz
TB1
VW
RED
WHT
BLK
MC
7
L1
L2
L3
N
N. F.
CNAC1
(WHT) 31
CNDC
(PNK) 31 CNL
(BLU)
13
CNAC2
(RED)
31
CNCT
(RED) 12
LO1
LO2
LO3
NO
GD1
NI
LI1
LI2
LI3
GD3
S1
S2
S3
CK
2
3
2
3
ACL4
ACL3
ACL2
ACL1
RED
WHT
BLK
BLU
RED
WHT
BLK
BLU
TB2
CN7
(WHT)
3
1
L3-OU
L3-A2
L2-OU
L2-A2
L1-OU
L1-A2
L1-A1
L1-IN
N-IN
CK-OU
X52CA
RED RED
BLK
BLU
RED RED
BLK BLK
WHT WHT
RED
WHT
BLK
YLW
ORN
BRN
BLK
RED
GRN/YLW
BLK BLK
CONV. B.
BRN
INDOOR
UNIT
C. B.
TH6TH7 TH4TH3
21S4
t° t° t° t°
LEV-A
CNS
(WHT)
CNAC
(WHT)
CNDC
(PNK)
F2
F1
F3
F4 21S4
(GRN)
CN2
(WHT)
CN4
(WHT)
TH7/6
(RED) TH3
(WHT)
TH4
(WHT)
TRANS
CNVMNT
(WHT) CNMNT (WHT)
CNM
(WHT)
LED1 LED2
X52
SV1
/CH
(GRY)
X54
63H
(YLW)
2
7
141221
13
311 5
114
12
17
3
1
13
12
34 31 31
LEV-A
(WHT)
51
SS
(WHT)
X51
31
MS
3~
MF1 CNF1
(WHT)
17
63L63H
63L
(RED)
13
31
TH34
t°
21
TH34
(RED)
63HS
(WHT)
63HS
LEV-B
(RED)
M
LEV-B
51
M
MF2 CNF2
(WHT)
17
CN7
(WHT)
1312
CN6
(WHT)
12
CN5
(RED)
CN2
(WHT)
1712
CN4
(WHT)
TB-N
TB-U
TB-V
TB-W
TB-L3 TB-L2 TB-L1
TH8
t°
RS
RED
MS
3~
22
2
CN3S
(WHT)
1
3
CNDM
(WHT)
CN51
(WHT)
1
3
1
5
CN52C
(RED)
13
MS
3~
BRN
CY1 CY2
SW7
SW6SW1
SW9
CN31
*
1
*
1
SW5SW8SW4SWP
+
-
+
*1 MODEL SELECT
The black square ( ) indicates a switch position.
PUHZ-SW100YHA.UK PUHZ-SW120YHA.UK
PUHZ-SW100YHA-BS.UK PUHZ-SW120YHA-BS.UK
OCH533A

18
8WIRING SPECIFICATIONS
FIELD ELECTRICAL WIRING (power wiring specifications)
Outdoor unit model SW75V SW100V SW120V SW100, 120Y
Outdoor unit power supply ~/N (single),
50 Hz, 230 V ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V 3N~ (3 ph 4-wires), 50 Hz, 400 V
Outdoor unit input capacity Main switch (Breaker) *1 25 A 32 A 40 A 16 A
Wiring
Wire No. ×
size (mm2)
Outdoor unit power supply 3 × Min. 2.5 3 × Min. 4 3 × Min. 6 5 × Min. 1.5
Indoor unit-Outdoor unit *2 3 × 1.5 (Polar) 3 × 1.5 (Polar) 3 × 1.5 (Polar) 3 × 1.5 (Polar)
Indoor unit-Outdoor unit earth *2 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 1.5
Remote controller-Indoor unit *3 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar)
Circuit rating
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3 phase) *4 AC 230 V AC 230 V AC 230 V AC 230 V
Indoor unit-Outdoor unit S1-S2 *4 AC 230 V AC 230 V AC 230 V AC 230 V
Indoor unit-Outdoor unit S2-S3 *4 DC 24 V DC 24 V DC 24 V DC 24 V
Remote controller-Indoor unit *4 DC 12 V DC 12 V DC 12 V DC 12 V
*1.A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2.Max. 45 m
If 2.5 mm2used, Max. 50 m
If 2.5 mm2used and S3 separated, Max. 80 m
*3.The 10 m wire is attached in the remote controller accessory.
*4.The figures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
S1
S2
S3
S1
S2
S3
Warning:
· In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation
between power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3
terminals when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2.
Power supply cables and the cables between Interface unit/Flow temp. controller and outdoor unit shall not be lighter than polychloroprene
sheathed flexible cables. (Design 60245 IEC 57
)
3. Be sure to connect the cables between
Interface unit/Flow temp. controller and outdoor unit directly to the units (no intermediate connections
are allowed).
Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may cause insufficient
insulation to ground or a poor electrical contact .
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)
4. Install an earth longer than other cables.
5. Do not construct a system with a power supply that is turned ON and OFF frequently.
Outdoor Unit
3 poles isolator
Power
supply
Isolator
Indoor unit
(Interface unit /
Flow temp.
controller)
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
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19
9REFRIGERANT SYSTEM DIAGRAM
unit : mm(inch)
Distributor
Thermistor TH7
(Ambient)
Heat exchanger
Refrigerant LIQUID pipe
connection :9.52(3/8)
Stop valve
(with service port)
Strainer
#100
Power
receiver
Linear
expansion valve B
Linear expansion valve A
Strainer
#100
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
High pressure
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Compressor
Strainer
#50
Strainer
#100
Strainer
#100
4-way valve
Charge plug
(Low pressure)
Charge plug
(High pressure)
Stop valve
(with service port)
Refrigerant GAS pipe
connection :15.88(5/8)
Pressure
sensor 63HS
Distributor
Thermistor TH7
(Ambient)
Heat exchanger
Refrigerant GAS pipe
connection ø15.88(5/8)
Refrigerant LIQUID pipe
connection ø9.52(3/8)
Stop valve
(with service port)
Strainer
#100
Power
receiver
Linear
expansion valve B
Linear expansion valve A
Strainer
#100
Strainer
#100
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Charge plug
(Low pressure)
Charge plug
(High pressure)
High pressure
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Compressor
Strainer
#50 4-way valve
Strainer
#100
Strainer
#100
Ball valve
Refrigerant flow in cooling
Refrigerant flow in heating
Pressure
sensor 63HS
Low pressure
switch 63L
PUHZ-SW100VHA
PUHZ-SW100VHA-BS
PUHZ-SW100YHA
PUHZ-SW100YHA-BS
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
PUHZ-SW120VHA
PUHZ-SW120VHA-BS
PUHZ-SW120YHA
PUHZ-SW120YHA-BS
COMP
H/P SW
L/P SW
REV/V
Charge plug
P-Sensor
LEV-A
LEV-B
TH3
TH4
TH6
TH7
TH34
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
For protection (OFF:4.15MPa)
For protection (OFF:-0.03MPa) (SW100/120)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
High pressure / Low pressure / For production test use
For calculation of the condensing temperature from high pressure
Heating:Secondary LEV Cooling:Primary LEV
Heating:Primary LEV Cooling:Secondary LEV
Heating:Evaporating temperature Cooling:Sub cool liquid temperature
For LEV control and for compressor protection
Outdoor 2-phase pipe temperature
For fan control and for compressor frequency control
For compressor protection
For accumulation of refrigerant
Compressor
High pressure switch (63H)
Low pressure switch (63L)
Reversing (4-way) valve (21S4)
Charge plug
Pressure sensor (63HS)
Linear expansion valve -A
Linear expansion valve -B
Liquid temperature thermistor
Discharge temperature thermistor
2-phase pipe temperature thermistor
Ambient temperature thermistor
Comp.surface temperature thermistor
Power Receiver
Symbol Part name Detail
Power Receiver
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20
9-2. Unit replacement operation
When reusing the existing pipes that carried R22 refrigerant for the SW75/100/120 models, replacement operation
must be performed before performing a test run.
1If new pipes are used, these procedures are not necessary.
2If existing pipes that carried R22 refrigerant are used for the SW75/100/120 models, these procedures are not necessary.
(The replacement operation cannot be performed.)
3During replacement operation, “C5” is displayed on “A-Control Service Tool (PAC-SK52ST)”. (This is applied to only
SW75/100/120 models.)
9-1. Refrigerant collecting (pump down)
Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit.
1Supply power (circuit breaker).
* When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CEN-
TRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.
* Start-up of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned on. Start the
pump-down operation 3 to 4 minutes after the power (circuit breaker) is turned ON.
* In the case of multi-units control, before powering on, disconnect the wiring between the master indoor unit and the slave
indoor unit. For more details refer to the installation manual for the indoor unit.
2After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor
(outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1
and LED2 on the control board of the outdoor unit are lit.
* Only set the SWP switch (push-button type) to ON if the unit is stopped. However, even if the unit is stopped and the
SWP switch is set to ON less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be per-
formed. Wait until compressor has been stopped for 3 minutes and then set the SWP switch to ON again.
3Because the unit automatically stops in about 2 to 3 minutes when the refrigerant collecting operation is completed (LED1
off, LED2 lit), be sure to quickly close the gas stop valve. If LED1 is lit and LED2 is off and the outdoor unit is stopped,
refrigerant collection is not properly performed. Open the liquid stop valve completely, and then repeat step 2after 3 min-
utes have passed.
* If the refrigerant collecting operation has been completed normally (LED1 off, LED2 lit), the unit will remain stopped until the
power supply is turned off.
4Turn off the power supply (circuit breaker).
* Note that when the extension piping is very long with large refrigerant amount, it may not be possible to perform a pump-
down operation. When performing the pump-down operation, make sure that the low pressure is lowered to near 0 MPa
(gauge).
Warning:
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor
may burst if air etc. get into it.
9-3. Start and finish of test run
• Operation from the indoor unit
Execute the test run using the installation manual for the indoor unit.
• Operation from the outdoor unit
By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation
mode (cooling/heating) can be set up.
1Set the operation mode (cooling/heating) using SW4-2.
2Turn on SW4-1 to start test run with the operation mode set by SW4-2.
3Turn off SW4-1 to finish the test run.
• There may be a faint knocking sound around the machine room after power is supplied, but this is
no problem with product because the linear expansion pipe is just moving to adjust opening pulse.
• There may be a knocking sound around the machine room for several seconds after compressor
starts operating, but this is no problem with product because the check valve itself, generates the
sound because pressure difference is small in the refrigerant circuit.
Note:
The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1,
change the operation mode and restart the test run by SW4-1.)
OFF 12
ON
<SW4>


Stop Operation
Cooling Heating
OCH533A