Mitsubishi Electric PUHZ-SW50VHA User manual

SERVICE MANUAL
R410A
Outdoor unit
[Model Name]
PUHZ-SW40VHA
PUHZ-SW50VHA
PUHZ-SW50VKA
[Service Ref.]
PUHZ-SW40VHA
PUHZ-SW40VHAR1
PUHZ-SW50VHA
PUHZ-SW50VHAR1
PUHZ-SW50VKA
PARTS CATALOG (OCB525)
CONTENTS
TECHNICAL CHANGES ····································2
1. REFERENCE MANUAL·································3
2. SAFETY PRECAUTION·································4
3. FEATURES·····················································8
4. SPECIFICATIONS··········································8
5. DATA·····························································10
6. OUTLINES AND DIMENSIONS···················12
7. WIRING DIAGRAM ······································14
8. WIRING SPECIFICATIONS··························16
9.
REFRIGERANT SYSTEM DIAGRAM ·············17
10. TROUBLESHOOTING ·································19
11. DISASSEMBLY PROCEDURE ····················65
Revision:
•Added
PUHZ-SW50VKAand
PUHZ-SW50VKA-BSin
REVISEDEDITION-C.
•Somedescriptionshave
beenmodified.
Salt proof model
PUHZ-SW40VHA-BS
PUHZ-SW50VHA-BS
PUHZ-SW50VKA-BS
PUHZ-SW40VHA-BS
PUHZ-SW40VHAR1-BS
PUHZ-SW50VHA-BS
PUHZ-SW50VHAR1-BS
PUHZ-SW50VKA-BS
Note:
•Thismanualdescribes
servicedataoftheoutdoor
unitsonly.
•PleasevoidOCH525
REVISEDEDITION-B.
No. OCH525
REVISED EDITION-C
July 2015
SPLIT-TYPE,AIRTOWATERHEATPUMP

2
TECHNICAL CHANGES
Service ref. have been changed as follows.
PUHZ-SW40VHA PUHZ-SW40VHAR1
PUHZ-SW50VHA PUHZ-SW50VHAR1
PUHZ-SW40VHA-BS PUHZ-SW40VHAR1-BS
PUHZ-SW50VHA-BS PUHZ-SW50VHAR1-BS
1.Addedanewfunction"EnergyMonitor"whichallowsremotecontrollertodisplaypowerconsumptionandheatoutput.
OCH525C

3
1REFERENCE MANUAL
INDOOR UNIT SERVICE MANUAL
ModelName Serviceref. ServicemanualNo.
EHST20C-VM6HB
EHST20C-YM9HB
EHST20C-TM9HB
EHST20C-VM2/6B
EHST20C-YM9B
EHST20C-VM6EB
EHST20C-YM9EB
EHST20C-VM6SB
EHST20C-VM6HB.UK
EHST20C-YM9HB.UK
EHST20C-TM9HB.UK
EHST20C-VM2/6B.UK
EHST20C-YM9B.UK
EHST20C-VM6EB.UK
EHST20C-YM9EB.UK
EHST20C-VM6SB.UK
OCH531
EHSC-VM2/6B
EHSC-YM9B
EHSC-TM9B
EHSC-VM6EB
EHSC-YM9EB
ERSC-VM2B
EHSC-VM2/6B.UK
EHSC-YM9B.UK
EHSC-TM9B.UK
EHSC-VM6EB.UK
EHSC-YM9EB.UK
ERSC-VM2B.UK
OCH532
PUHZ-SW40VHA(-BS) PUHZ-SW50VHA(-BS)
PUHZ-SW40VHAR1(-BS) PUHZ-SW50VHAR1(-BS) PUHZ-SW50VKA(-BS)
ModelName Serviceref. ServicemanualNo.
EHST20D-VM2C
EHST20D-MEC
EHST20D-MHC
EHST20D-MHCW
EHST20D-VM2EC
EHST20D-YM9C
ERST20D-VM2C
ERST20D-MEC
EHST20D-VM2C(R1).UK
EHST20D-MEC(R1).UK
EHST20D-MHC(R1).UK
EHST20D-MHCW(R1).UK
EHST20D-VM2EC(R1).UK
EHST20D-YM9C(R1).UK
ERST20D-VM2C(R1).UK
ERST20D-MEC(R1).UK
OCH570
EHSD-MEC
EHSD-MC
EHSD-VM2C
EHSD-YM9C
ERSD-VM2C
EHSD-MEC(R1).UK
EHSD-MC(R1).UK
EHSD-VM2C(R1).UK
EHSD-YM9C(R1).UK
ERSD-VM2C(R1).UK
OCH571
OCH525C

4
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
2SAFETY PRECAUTION
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Preparation before the repair service.
• Prepare the proper tools.
• Prepare the proper protectors.
• Provide adequate ventilation.
• After stopping the operation of heat pump, 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.
Use new refrigerant pipes. Make sure that the inside and outside of refrige-
rant piping is clean and it has no contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
In case of using the existing pipes for R22, be careful with
the following;
· Be sure to clean the pipes and make sure that the insides
of the pipes are clean.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
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.
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.
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.
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.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
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.
OCH525C

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asyphontype.
·Chargingshouldbeperformedwiththecylinderofsyphonstoodvertically.(Refrigerantischargedfromliquidphase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
 No. Toolname Specifications
1 Gaugemanifold ·OnlyforR410A
   ·Usetheexistingfittingspecifications.(UNF1/2)
   ·Usehigh-tensionsidepressureof5.3MPa·Gorover.
2 Chargehose ·OnlyforR410A
   ·Usepressureperformanceof5.09MPa·Gorover.
3 Electronicscale
4 Gasleakdetector ·UsethedetectorforR134a,R407CorR410A.
5 Adaptorforreverseflowcheck ·Attachonvacuumpump.
6 Refrigerantchargebase
7 Refrigerantcylinder ·OnlyforR410A·Topofcylinder(Pink)
   ·Cylinderwithsyphon
8 Refrigerantrecoveryequipment
OCH525C

6
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
(1) Flowchart
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.
2-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
(2) 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.
1Thickness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0.7mmorbelow.)
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 (in)
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness (mm)
R410A R22
Performtheairtighttest,vacuumairpurging,
additionalrefrigerantcharging(ifnecessary),
andgasleakcheck.
•Refertotheowchartbelowtodetermineiftheexistingpipescanbeusedandifitisnecessarytousealterdryer.
•Ifthediameteroftheexistingpipesisdifferentfromthespecieddiameter,refertotechnologicaldatamaterialstoconrmif
thepipescanbeused.
▼
▼
▼
▼
▼
▼▼
Measuretheexistingpipethicknessand
checkfordamage.
The existing pipe thickness meets specica-
tions and the pipes are not damaged.
Checkiftheexistingheatpumpcanoperate.
Afteroperatingthecoolingsystemforabout30
minutes,doapumpdownwork.
Disconnecttheexistingheatpumpfromthe
pipes.
Attachthenewheatpump
Testrun Theexistingpipescannotbereused.
Usenewpipes.
•Iftheexistingheatpumpcannotoperate,use
arefrigerantrecoverydevicetocollecttherefrigerant.
•UsenewpipesforSW40–50models.
The existing pipe thickness does not meet
specications or the pipes are damaged.
OCH525C

7
2Dimensions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refriger-
ants.Therefore,toenhanceairtightnessandstrength,flarecuttingdimensionofcopperpipeforR410Ahasbeenspeci-
fied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strengthasshownbelow.Setcopperpipecorrectlyreferringtocopperpipeflaring
dimensionsforR410Abelow.For1/2and5/8inchpipes,thedimensionBchanges.
Usetorquewrenchcorrespondingtoeachdimension.
3Tools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
9.1
13.2
16.6
19.7
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions (in)
Flare cutting dimensions
Outside
diameter (mm)
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 (in)
Flare nut dimensions Outside
diameter (mm)
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 adap-
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 adapter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil:
Alkylbenzene oil: minimum amount
(Usable if equipped
with adapter 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
OCH525C

8
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT
maximum 10 m (PUHZ-SW40/SW50)
TherefrigerantcircuitwithLEV(LinearExpansionValve)andpowerreceiveralwayscontroltheoptimalrefrigerantlevel
regardlessofthelength(10mmaximumand5mminimum)ofpiping.Theadditionalrefrigerantchargingworkduringinstal-
lationoftencausesproblems.Itiscompletelyeliminatedbychargelesssystem.Thisuniquesystemimprovesthequality
andreliabilityoftheworkdone.Italsohelpstospeeduptheinstallationtime.
Note:"COP"and"Powerinput"inthetableabovedoNOTincludethe"pumpinput(basedonEN14511)".
4 SPECIFICATIONS
PUHZ-SW40VHA
PUHZ-SW40VHA-BS
PUHZ-SW40VHAR1
PUHZ-SW40VHAR1-BS
PUHZ-SW50VHA
PUHZ-SW50VHA-BS
PUHZ-SW50VHAR1
PUHZ-SW50VHAR1-BS
PUHZ-SW50VKA
PUHZ-SW50VKA-BS
Nominal water ow L/min 11.8
Heating
(A7/W35) Capacity kW 4.10
COP 4.80
Powerinput kW 0.85
Heating
(A7/W45) Capacity kW 4.10
COP 3.63
Powerinput kW 1.13
Heating
(A2/W35) Capacity kW 4.00
COP 3.24
Powerinput kW 1.24
Heating
(A2/W45) Capacity kW 4.00
COP 2.68
Powerinput kW 1.49
Nominal water ow L/min 10.3
Cooling
(A35/W7) Capacity kW 3.60
EER 2.71
Powerinput kW 1.33
Cooling
(A35/W18) Capacity kW 3.60
EER 4.65
Powerinput kW 0.77
(SW40)
VHA VKA
Nominal water ow L/min 17.2 15.8
Heating
(A7/W35) Capacity kW 6.00 5.50
COP 4.42 4.42
Powerinput kW 1.36 1.24
Heating
(A7/W45) Capacity kW 6.00 5.50
COP 3.32 3.32
Powerinput kW 1.81 1.66
Heating
(A2/W35) Capacity kW 5.00 5.00
COP 2.97 2.97
Powerinput kW 1.68 1.68
Heating
(A2/W45) Capacity kW 5.00 5.00
COP 2.47 2.47
Powerinput kW 2.02 2.02
Nominal water ow L/min 12.9 12.9
Cooling
(A35/W7) Capacity kW 4.50 4.50
EER 2.38 2.76
Powerinput kW 1.89 1.63
Cooling
(A35/W18) Capacity kW 5.00 5.00
EER 3.96 4.60
Powerinput kW 1.26 1.09
(SW50)
PUHZ-SW40VHA PUHZ-SW40VHAR1
PUHZ-SW40VHA-BS PUHZ-SW40VHAR1-BS
PUHZ-SW50VHA PUHZ-SW50VHAR1 PUHZ-SW50VKA
PUHZ-SW50VHA-BS PUHZ-SW50VHAR1-BS PUHZ-SW50VKA-BS
<Reference data> Plate heat exchanger (ACH70-40 plates)
OCH525C

9
A
kW
W
kW
K
/min(CFM )
dB
dB
mm (in)
mm (in)
mm (in)
kg (lb)
kg (lb)
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) oNo.
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-SW40VHA
PUHZ-SW40VHA-BS
PUHZ-SW40VHAR1
PUHZ-SW40VHAR1-BS
PUHZ-SW50VHA
PUHZ-SW50VHA-BS
PUHZ-SW50VHAR1
PUHZ-SW50VHAR1-BS
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic scroll
0.9
Inverter
—
Plate fin coil
Propeller fan o1
Reverse cycle
R410A
0.50 (FV50S)
6.35 (1/4)
12.7 (1/2)
Flared
Flared
HP switch
Comp. surface thermo
Discharge thermo
Overcurrent detection
Single, 50Hz, 230V
13
46
46
45
45
OUTDOOR UNIT
REFRIGERANT PIPING
PUHZ-SW50VKA
PUHZ-SW50VKA-BS
SNB130FGCM2 SNB130FTCM2
42 (93)
2.1 (4.6)
43 (95)
1.4 (3.1)
Maximum 10 m Maximum 30 m
2 to 40 m
800 (31-1/2)
300+23 (11-13/16+7/8)
600 (23-5/8)
809+62 (31-13/16+2-7/16)
300 (11-3/16)
630 (24-13/16)
0.040
35 (1,240) 0.046 45 (1,590)
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
PUHZ-SW40VHA PUHZ-SW40VHAR1
PUHZ-SW40VHA-BS PUHZ-SW40VHAR1-BS
PUHZ-SW50VHA PUHZ-SW50VHAR1 PUHZ-SW50VKA
PUHZ-SW50VHA-BS PUHZ-SW50VHAR1-BS PUHZ-SW50VKA-BS
OCH525C

10
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A: kg)
U-V
U-W
W-V
Service Ref.
Compressor model
Winding
Resistance
( ")
(at 20°C)
SNB130FGCM2
0.64
0.64
0.64
PUHZ-SW40VHAR1(-BS)
PUHZ-SW40VHA(-BS)
PUHZ-SW50VHA(-BS)
PUHZ-SW50VHAR1(-BS)
PUHZ-SW50VKA(-BS)
SNB130FTCM2
0.64
0.64
0.64
Additionalchargeisrequiredforpipes
longerthan10m.
Service Ref. Pipinglength(oneway) Initial
charged
10m 20m 30m 40m 50m 60m 75m
PUHZ-SW40VHA
PUHZ-SW40VHA-BS
PUHZ-SW40VHAR1
PUHZ-SW40VHAR1-BS
2.1 2.3 2.5 2.7 ———2.1
PUHZ-SW50VHA
PUHZ-SW50VHA-BS
PUHZ-SW50VHAR1
PUHZ-SW50VHAR1-BS
2.1 2.3 2.5 2.7 ———2.1
PUHZ-SW50VKA
PUHZ-SW50VKA-BS 1.4 1.6 1.8 2.0 ———1.4
5-2. COMPRESSOR TECHNICAL DATA
OCH525C

11
5-3. NOISE CRITERION CURVES
1.5 m
1 m
MICROPHONE
UNIT
GROUND
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SW40VHA(-BS)
PUHZ-SW40VHAR1(-BS)
COOLING
MODE
HEATING
45
SPL(dB)
45
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SW50VHA(-BS)
PUHZ-SW50VHAR1(-BS)
COOLING
MODE
HEATING
46
SPL(dB)
46
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
COOLING
MODE
HEATING
46
SPL(dB)
46
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
PUHZ-SW50VKA(-BS)
OCH525C

12
6OUTLINES AND DIMENSIONS
Unit: mm
100 mm or more as long as
no obstacle is placed on the
rear and right-and-left sides
of the unit.
*1 In the place where short cycle tends to occur,cooling and heating
capacity and power consumption might get lowered 10%. Air outlet
guide (optional PAC-SG58SG) will help them improve.
*2 If air discharges to the wall, the surface might det stained.
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts, washers and nut must
be purchased locally).
FOUNDATION BOLTS
Minimum installation space for outdoor unit
Free space around the outdoor unit
(basic example)
Piping and wiring connection can
be made from the rear direction only.
PIPING-WIRING DIRECTION
Handle for moving
Handle for
moving
18
69
10
600
300
287.5
800
Terminal connections
Left・・・Power supply wiring
Right・・・Indoor/Outdoor wiring
Service panel
Earth terminal
Service panel
for charge plug
Connection for
liquid pipe FLARE [6.35(1/4F)
Connection for
gas pipe FLARE [12.7(1/2F)
Service port 183
440
23
90
155
35°
43°
6-[33 drain hole
2-[12 drain hole
70
45
400 500
347.4
226
0
43.6
155
152
74.3
0
60 118 0
284.3
Less than
<Foundation bolt height>
18mm
100mm or more
500mm or more
2 sides should be open in
the right,left and rear side.
*1
*2
*1
350mm or more
100mm or more
Basically open
Air discharge
4-10×21 oval hole
Side air intake
Rear air intake
32.5
40
330
300
365
150 500
Installation bolt pitch
FOUNDATION
PUHZ-SW40VHA PUHZ-SW40VHAR1 PUHZ-SW50VHA PUHZ-SW50VHAR1
PUHZ-SW40VHA-BS PUHZ-SW40VHAR1-BSPUHZ-SW50VHA-BS PUHZ-SW50VHAR1-BS
OCH525C

13
Free space around the outdoor unit (basic example)
100mm or more as long as no obstacle is placed on the rear and right-and-left sides of the unit
2 sides should be open in the right, left and rear side.
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts, washers and nut must be purchased locally).
FOUNDATION BOLTS
Piping and wiring connection can be made from the rear direction only.
PIPING-WIRING DIRECTION
500mm or more 100mm or more100mm or more
Basically open
350mm or more
Service port Connection for
gas pipe FLARE [12.7 (1/2F)
Connection for liquid pipe FLARE [6.35 (1/4F)
Service panel for charge plug
Service panel Earth terminal
( )
Terminal connection Left・・・Power supply wiring Right・・・Indoor/Outdoor wiring
23.2
99.5
164.5 492
193.5
35°
43°
Air discharge
Air intake
Air intake
oval hole
2-10×21
drain hole
[42
360
330
32.5 300
40
404.5
48
Handle for moving
Installation bolt pitch
22.3
630
320
8.5
809 500
310
154.5
62
FOUNDATION
18 mm
<Foundation bolt height>
Less than
2-U Shaped notched holes (Foundation Bolt M10)
(Foundation Bolt M10)
PUHZ-SW50VKA
PUHZ-SW50VKA-BS
Unit: mm
OCH525C

14
7WIRING DIAGRAM
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
L N S1 S2 S3
INDOOR
UNIT
POWER SUPPLY
~/N 230V 50Hz
TB1
V
W
5
2
2
2
2
RED
WHT
BLK
t° t° t° t° t°
t°
M C
CN5
(RED)
CNAC2
(RED)
CNAC1
(WHT)
LO N O
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
1 4 1 2 2 1
13
31 1 5
1
14
1
3
1 2 1 2
1 7
3
1
13
1 2
3 4 31 31
LEV-A
(WHT)
51
MS
3~
CB2CB1
R
S
U
V
W
PFC
IPM
ACL
E3E2
RED
BLU
RE D
W HT
RE D
W HT
YLW
ORN
BLK
BLK
BLK
BRN
RE D
W HT
RE D
W HT
CY1
CY2
GRN/YLW
SS
(WHT)
X51
31
MS
3~
MF1 CNF1
(WHT)
17
63H
31
TH34
2 1
TH34
(RED)
63HS
(WHT)
63HS
LEV-B
(RED)
M
LEV-B
51
M
CNDM
(WHT)
CN51
(WHT)
1
3
1
5
+ + +
SW7
SW6SW1
SW9
CN31
SW5SW8SW4SWP
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
OFF
ON
40V
MODEL SW6 SW5-6 *2
OFF
ON
OFF
ON
50V
OFF
ON
1 2 3 4 5 6
1 2 3 4 5 6
*1 MODEL SELECT
The black square ( ) indicates a switch position.
*2 SW5 -1 to 5 : Function Switch
*1 *1
PUHZ-SW40VHA PUHZ-SW40VHAR1 PUHZ-SW50VHA PUHZ-SW50VHAR1
PUHZ-SW40VHA-BS PUHZ-SW40VHAR1-BSPUHZ-SW50VHA-BS PUHZ-SW50VHAR1-BS
OCH525C

15
PUHZ-SW50VKA
PUHZ-SW50VKA-BS
TB1
MC
MF1
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A, LEV-B
ACL
Terminal Block<Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (4-Way Valve)
High Pressure Switch
63HS High Pressure Sensor
Thermistor<Liquid>
Thermistor<Discharge>
Thermistor<2-Phase Pipe>
Thermistor<Ambient>
Thermistor<Heat Sink>
TH34 Thermistor<Comp. Surface>
Linear Expansion Valve
Reactor
Controller Circuit Board
CNDM Connector<Connection for Option
>
C. B.
SYMBOL NAME SYMBOL NAME
Fuse<T10AL250V>
F1, F2 Fuse<T3.15AL250V>
F3, F4
CN51 Connector<Connection for Option>
Switch<Manual Defrost, Defect History
Record Reset, Refrigerant Address>
Switch<Function Switch>
Switch<Function Switch, Model Select>
Switch<Function Switch>
SW1
SW4
SW5
SW7 Switch<Function Switch>
Switch<Pump Down>
SW8
S. B.
Switch<Model Select>
SW6
Switch Board
SWP Connector<Connection for Option>CNM
1 2 3 4 5 6 7 8
MODEL SW6
*1 MODEL SELECT
SW5-6 *2
OFF
ON
50V
OFF
ON
1 2 3 4 5 6
*2 SW5 -1 to 5 : Function Switch
The black square ( ) indicates a switch position.
OCH525C

16
8WIRING SPECIFICATIONS
FIELD ELECTRICAL WIRING (power wiring specifications)
Notes: 1. Wiring size must comply with the applicable local and national code..
2. Power supply cables and Indoor/Outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable.
3. Install an earth longer than other cables.
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.
(Design 60245 IEC 57)
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
Power supply
Isolator
A-Control
Indoor Unit
Outdoorunitmodel SW40,50V
Outdoorunitpowersupply ~/N(single),
50Hz,230V
OutdoorunitinputcapacityMainswitch(Breaker) *1 16A
Wiring
WireNo.×
size(mm2)
Outdoorunitpowersupply 3×Min.1.5
Indoorunit-Outdoorunit *2 3×1.5(Polar)
Indoorunit-Outdoorunitearth *2 1×Min.1.5
Remotecontroller-Indoorunit *3 2×0.3(Non-polar)
Circuitrating
OutdoorunitL-N(single)
OutdoorunitL1-N,L2-N,L3-N(3phase)
*4 230VAC
Indoorunit-OutdoorunitS1-S2 *4 230VAC
Indoorunit-OutdoorunitS2-S3 *4 24VDC
Remotecontroller-Indoorunit *4 12VDC
*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inadequatebreakercancausetheincorrectoperationofinverter.
*2. Maximum45m
If2.5mm²isused,maximum50m.
If2.5mm²isusedandS3isseparated,maximum80m.
*3. The10mwireisattachedintheremotecontrolleraccessory.
*4. TheguresareNOTalwaysagainsttheground.
S3terminalhas24VDCagainstS2terminal.HoweverbetweenS3andS1,theseterminalsareNOTelectricallyinsulatedbythetransformerorotherdevice.
Caution: Be sure to install N-Line. Without N-Line, it could cause damage to the unit.
OCH525C

17
9REFRIGERANT SYSTEM DIAGRAM
Unit: mm (in)
Refrigerant flow in cooling
Refrigerant flow in heating
Thermistor TH7
(Ambient)
Heat exchanger
Refrigerant GAS pipe
connection ø12.7(1/2F)
Refrigerant LIQUID pipe
connection ø6.35(1/4F)
Stop valve
Strainer
#100
Power
receiver
Linear
expansion valve B
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Charge plug
High pressure
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Compressor
Strainer
#50
Solenoid valve
(Four-way valve)
Distributor
Linear expansion valve A Strainer
#100
Stop valve
(with service port)
High pressure sensor
(63HS)
COMP
H/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)
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)
Reversing (4-way) valve (21S4)
Charge plug
High 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
PUHZ-SW40VHA PUHZ-SW40VHAR1
PUHZ-SW40VHA-BS PUHZ-SW40VHAR1-BS
PUHZ-SW50VHA PUHZ-SW50VHAR1 PUHZ-SW50VKA
PUHZ-SW50VHA-BS PUHZ-SW50VHAR1-BS PUHZ-SW50VKA-BS
OCH525C

18
9-1. REFRIGERANT COLLECTING (PUMP DOWN)
Performthefollowingprocedurestocollecttherefrigerantwhenmovingtheindoorunitortheoutdoorunit.
1Supply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.
2Aftertheliquidstopvalveisclosed,settheSWPswitchonthecontrolboardorswitch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orswitch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performed.
Waituntilcompressorhasbeenstoppedfor3minutesandthensettheSWPswitchtoONagain.
3Because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,refriger-
antcollectionisnotproperlyperformed.Opentheliquidstopvalvecompletely,andthenrepeatstep2after3minutes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.
4Turn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. enters the system.
OCH525C

19
10 TROUBLESHOOTING
10-1. TROUBLESHOOTING
<Check code displayed by self-diagnosis and actions to be taken for service (summary)>
Presentandpastcheckcodesarelogged,andtheycanbedisplayedonthecontrolboardorswitchboardofoutdoorunit.
Actionstobetakenforservice,whichdependsonwhetherornotthetroubleisreoccurringinthefield,aresummarizedinthe
tablebelow.Checkthecontentsbelowbeforeinvestigatingdetails.
Unitconditionsatservice Checkcode Actionstobetakenforservice(summary)
Thetroubleisreoccurring.
Displayed Judgewhatiswrongandtakeacorrectiveactionaccordingto
“10-3.SELF-DIAGNOSISACTIONTABLE”.
Notdisplayed Conducttroubleshootingandascertainthecauseofthe
trouble.
Thetroubleisnotreoccurring.
Logged
1Considerthetemporarydefectssuchastheworkof
protectiondevicesintherefrigerantcircuitincluding
compressor,poorconnectionofwiring,noise,etc.Re-
checkthesymptom,andchecktheinstallationenvironment,
refrigerantamount,weatherwhenthetroubleoccurred,
mattersrelatedtowiring,etc.
2Resetcheckcodelogsandrestarttheunitafternishing
service.
3Thereisnoabnormalityinelectricalcomponent,controller
board,etc.
Notlogged
1Re-checktheabnormalsymptom.
2Conducttroubleshootingandascertainthecauseofthe
trouble.
3Continuetooperateunitforthetimebeingifthecauseis
notascertained.
4Thereisnoabnormalityconcerningofpartssuchas
electricalcomponent,controllerboard,etc.
10-2. CHECK POINT UNDER TEST RUN
Before test run
• Afterinstallationofoutdoorunit,pipingworkandelectricwiringwork,re-checkthatthereisnowaterleakage,loosenedcon-
nectionsandincorrectpolarity.
• Measureimpedancebetweenthegroundandthepowersupplyterminalblock(L,N)ontheoutdoorunitby500VMegger
andcheckthatitis1.0M orover.
• Turnonpowersupply12hoursbeforetestruninordertoprotectcompressor.
• Makesuretoreadoperationmanualbeforetestrun.(Especiallyitemstosecuresafety.)
Warning:
Do not use the system if the insulation resistance is less than 1.0 MΩ.
Caution:
Do not carry out this test on the control wiring (low voltage circuit) terminals.
OCH525C

20
10-3. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is put on>
 Note:RefertoindoorunitsectionforcodePandcodeE.
Check Code Abnormal points and detection method Case Judgment and action
None —
1Novoltageissuppliedtoterminal
block(TB1)ofoutdoorunit.
a)Powersupplybreakeristurned
off.
b)Contactfailureordisconnectionof
powersupplyterminal
c)Openphase(LorNphase)
2Electricpowerisnotsuppliedto
powersupplyterminalofoutdoor
powercircuitboard.
a)Contactfailureofpowersupply
terminal
b)Openphaseontheoutdoorpower
circuitboard(Disconnectionof
terminalonoutdoorpowercircuit
board)
3Electricpowerisnotsuppliedto
outdoorcontrollercircuitboard.
a)Disconnectionofconnector
(CNDC)
4Disconnectionofreactor(ACL)
5Disconnectionofoutdoornoise
filtercircuitboardorpartsfailure
inoutdoornoisefiltercircuitboard
(SW40/50VHA(R1)only)
6Defectiveoutdoorpowercircuit
board(SW40/50VHA(R1)only)
7Defectiveoutdoorcontrollercircuit
board
1Checkfollowingitems.
a)Powersupplybreaker
b)Connectionofpowersupplyterminal
block.(TB1)
c)Connectionofpowersupplyterminal
block.(TB1)
2Checkfollowingitems.
a)Connectionofpowersupplyterminal
block(TB1)
b)Connectionofterminalonoutdoorpower
circuitboard
3
Check connectionoftheconnector(CNDC)
ontheoutdoorcontrollercircuitboard.
 Check connectionoftheconnector,LD1and
LD2forSW40/50VHAontheoutdoorpower
circuitboard.Referto"10-9.TESTPOINT
DIAGRAM".
4 Check connectionofreactor(ACL).
Checkconnectionof“LO”and
“NO”ontheoutdoornoisefiltercircuit
boardforSW40/50VHA.
Checkconnectionof“R”and“S”onthe
outdoorpowercircuitboardforSW40/50VHA .
Referto"10-9.TESTPOINTDIAGRAM".
CheckconnectionofreactorforSW50VKA.
Referto"7.WIRINGDIAGRAM".
5a)Checkconnectionofoutdoornoisefil-
tercircuitboardfor
SW40/50VHA .
 b) Replaceoutdoornoisefiltercircuitboard
for SW40/50VHA .
 Referto"10-9.TESTPOINTDIAGRAM".
6Replaceoutdoorpowercircuitboard.
7Replaceoutdoorcontrollercircuitboard
(Whenitemsabovearecheckedbutthe
unitscannotberepaired).
F5
63H connector open
Abnormalif63Hconnectorcircuitisopenfor
3minutescontinuouslyafterpowersupply.
63H:High-pressureswitch
1Disconnectionorcontactfailureof
63Hconnectoronoutdoorcontrol-
lercircuitboard
2Disconnectionorcontactfailureof
63H
363Hisworkingduetodefective
parts.
4Defectiveoutdoorcontrollercircuit
board
1
Checkconnectionof63Hconnectoron
outdoorcontrollercircuitboard.
 Referto"10-9.TESTPOINTDIAGRAM".
2Checkthe63Hsideofconnectingwire.
3Checkcontinuitybytester.
 Replacethepartsifthepartsaredefective.
4Replaceoutdoorcontrollercircuitboard.
OCH525C