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