Mitsubishi Electric EHSE-YM9EC User manual

SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL................................... 2
2. SAFETY PRECAUTION................................... 3
3. SPECIFICATIONS............................................ 6
4. PARTS NAMES AND FUNCTIONS ................ 8
5. OUTLINES AND DIMENSIONS....................... 9
6. WIRING DIAGRAM.........................................11
7. FIELD WIRING............................................... 16
8. WATER SYSTEM DIAGRAM......................... 18
9. CONTROLS ................................................... 21
10. TROUBLESHOOTING................................... 41
11. DISASSEMBLY PROCEDURE...................... 57
12. SUPPLEMENTARY INFORMATION ............. 72
13. SERVICE AND MAINTENANCE ................... 73
Notes:
•This manual describes
service data of Hydrobox
only.
•RoHS compliant products
have <G> mark on the
spec name plate.
R410A
MAIN REMOTE
CONTROLLER
PARTS CATALOG (OCB590)
HYDROBOX
[Model Name]
EHSE-YM9EC
EHSE-MEC
ERSE-YM9EC
ERSE-MEC
[Service Ref.]
EHSE-YM9EC.UK
EHSE-YM9ECR1.UK
EHSE-MEC.UK
EHSE-MECR1.UK
ERSE-YM9EC.UK
ERSE-YM9ECR1.UK
ERSE-MEC.UK
ERSE-MECR1.UK
August 2015
HYDROBOX
No. OCH590
REVISED EDITION-B
Revision:
•AddedEHSE-YM9ECR1.UK,
EHSE-MECR1.UK,
ERSE-YM9ECR1.UK and
ERSE-MECR1.UK
in
REVISED EDITION-B.
•Somedescriptionshave
been modified.
•PleasevoidOCH590
REVISEDEDITION-A.

2
REFERENCE MANUAL
1
OUTDOOR UNIT'S SERVICE MANUAL
Model Name Service Ref. Service Manual No.
PUHZ-SW160YKA PUHZ-SW160YKA.UK
OCH583
OCB583
PUHZ-SW160YKAR1.UK
PUHZ-SW200YKA PUHZ-SW200YKA.UK
PUHZ-SW200YKAR1.UK
PUHZ-SW160YKA-BS PUHZ-SW160YKA-BS.UK
PUHZ-SW160YKAR1-BS.UK
PUHZ-SW200YKA-BS PUHZ-SW200YKA-BS.UK
PUHZ-SW200YKAR1-BS.UK
PUHZ-SHW230YKA PUHZ-SHW230YKA OCH534
OCB534
PUHZ-SHW230YKAR1
PUHZ-SHW230YKA2 PUHZ-SHW230YKA2 OCH594
OCB594
OCH590B

3
SAFETY PRECAUTION
2
WARNING
Mechanical
Thehydroboxandoutdoorunitsmustnotbeinstalled,disassembled,relocated,alteredorrepairedbytheuser.Askanauthorisedinstallerortechnician.Ifthe
unitisinstalledimproperlyormodiedafterinstallationbytheuserwaterleakage,electricshockorremayresult.
Theoutdoorunitshouldbesecurelyxedtoahardlevelsurfacecapableofbearingitsweight.
Thehydroboxshouldbepositionedonahardverticalsurfacecapableofsupportingitslledweighttopreventexcessivesoundorvibration.
Donotpositionfurnitureorelectricalappliancesbelowtheoutdoorunitorhydrobox.
Thedischargepipeworkfromtheemergency/safetydevicesofthehydroboxshouldbeinstalledaccordingtolocallaw.
OnlyuseaccessoriesandreplacementpartsauthorisedbyMitsubishiElectricaskaqualiedtechniciantottheparts.
Electrical
Allelectricalworkshouldbeperformedbyaqualiedtechnicianaccordingtolocalregulationsandtheinstructionsgiveninthismanual.
Theunitsmustbepoweredbyadedicatedpowersupplyandthecorrectvoltageandcircuitbreakersmustbeused.
Wiringshouldbeinaccordancewithnationalwiringregulations.Connectionsmustbemadesecurelyandwithouttensionontheterminals.
Earth unit correctly.
General
Keepchildrenandpetsawayfromboththehydroboxandoutdoorunits.
Donotusethehotwaterproducedbytheheatpumpdirectlyfordrinkingorcooking.Thiscouldcauseillnesstotheuser.
Do not stand on the units.
Donottouchswitcheswithwethands.
Annualmaintenancechecksonboththehydroboxandtheoutdoorunitshouldbeconductedbyaqualiedperson.
Donotplacecontainerswithliquidsontopofthehydrobox.Iftheyleakorspillontothehydroboxdamagetotheunitand/orrecouldoccur.
Do not place any heavy items on top of the hydrobox.
Wheninstalling,relocating,orservicingthehydrobox,useonlythespeciedrefrigerant(R410A)tochargetherefrigerantlines.Donotmixitwithanyotherre-
frigerantanddonotallowairtoremaininthelines.Ifairismixedwiththerefrigerant,thenitcanbethecauseofabnormalhighpressureintherefrigerantline,
and may result in an explosion and other hazards.
Theuseofanyrefrigerantotherthanthatspeciedforthesystemwillcausemechanicalfailureorsystemmalfunctionorunitbreakdown.Intheworstcase,this
couldleadtoaseriousimpedimenttosecuringproductsafety.
Inheatingmode,toavoidtheheatemittersbeingdamagedbyexcessivelyhotwater,setthetargetowtemperaturetoaminimumof2ºCbelowthemaximum
allowabletemperatureofalltheheatemitters.ForZone2,setthetargetowtemperaturetoaminimumof5ºCbelowthemaximumallowableowtemperature
ofalltheheatemittersinZone2circuit.
Donotinstalltheunitwherecombustiblegasesmayleak,beproduced,ow,oraccumulate.Ifcombustiblegasaccumulatesaroundtheunit,reorexplosion
may result.
Donotdischargerefrigerantintotheatmosphereifrefrigerantleaksduringinstallation,ventilatetheroom.
Useappropriatetoolsforhighpressurerefrigerant.
Whenpumpingdownrefrigerant,stopthecompressorbeforedisconnectingtherefrigerantpipes.
Duringinstallationsecurelyfastentherefrigerantpipesbeforestartingthecompressor.
Checkthatrefrigerantgasdoesnotleakafterthecompletionofinstallation.
UseR410Arefrigerantonly.Donotallowairtoenterthelines.Failuretoobservetheseinstructionswillcausemechanicalfailure,systemfailureor,intheworst
case, serious breach of product safety.
Please read the following safety precautions carefully.
WARNING:
Precautions that must be observed to prevent injuries or death.
CAUTION:
Precautions that must be observed to prevent damage to unit.
This service manual along with the user manual should be left with the product after installation for future reference.
Mitsubishi Electric is not responsible for the failure of locally-supplied parts.
• Besuretoperformperiodicalmaintenance.
• Besuretofollowyourlocalregulations.
• Besuretofollowtheinstructionsprovidedinthismanual.
OCH590B

4
CAUTION
Usecleanwaterthatmeetslocalqualitystandardsontheprimarycircuit.
Theoutdoorunitshouldbeinstalledinanareawithsufcientairowaccordingtothediagramsintheoutdoorunitinstallationmanual.
The hydrobox should be located inside to minimise heat loss.
Waterpipe-runsontheprimarycircuitbetweenoutdoorandindoorunitshouldbekepttoaminimumtoreduceheatloss.
Ensurecondensatefromoutdoorunitispipedawayfromthebasetoavoidpuddlesofwater.
Removeasmuchairaspossiblefromwatercircuit.
Refrigerantleakagemaycausesuffocation.ProvideventilationinaccordancewithEN378-1.
Besuretowrapinsulationaroundthepiping.Directcontactwiththebarepipingmayresultinburnsorfrostbite.
Neverputbatteriesinyourmouthforanyreasontoavoidaccidentalingestion.
Batteryingestionmaycausechokingand/orpoisoning.
Installtheunitonarigidstructuretopreventexcessivesoundorvibrationduringoperation.
Ifpowertothehydroboxistobeturnedoff(orsystemswitchedoff)foralongtime,thewatershouldbedrained.
Preventativemeasuresshouldbetakenagainstwaterhammer,suchasinstallingaWaterHammerArrestorontheprimarywatercircuit,asdirectedbytheman-
ufacturer.
Inordertopreventcondensationonemitters,adjustowtemperatureappropriatelyandalsosetthelowerlimitoftheowtemperatureonsite.
<UsingR410Arefrigerantheatpumps>
UseC1220copperphosphorus,forcopperandcopperalloyseamlesspipes,toconnecttherefrigerantpipes.Makesuretheinsidesofthepipesarecleanand
donotcontainanyharmfulcontaminantssuchassulfuriccompounds,oxidants,debris,ordust.Usepipeswiththespeciedthickness.(Referto4.4intheinstal-
lationmanual.)NotethefollowingifreusingexistingpipesthatcarriedR22refrigerant.
-Replacetheexistingarenutsandarethearedsectionsagain.
-Donotusethinpipes.(Referto4.4in the installation manual.)
Storethepipestobeusedduringinstallationindoorsandkeepbothendsofthepipessealeduntiljustbeforebrazing.(Leaveelbowjoints,etc.intheirpackag-
ing.)Ifdust,debris,ormoistureenterstherefrigerantlines,oildeteriorationorcompressorbreakdownmayresult.
Useesteroil,etheroil,alkylbenzeneoil(smallamount)astherefrigerationoilappliedtothearedsections.Ifmineraloilismixedintherefrigerationoil,oildete-
rioration may result.
DonotuserefrigerantotherthanR410Arefrigerant.Ifanotherrefrigerantisused,thechlorinewillcausetheoiltodeteriorate.
Usethefollowingtoolsspecicallydesignedforusewith R410Arefrigerant.Thefollowingtoolsarenecessaryto use R410Arefrigerant.Contactyournearest
dealer for any questions.
Tools(forR410A)
Gaugemanifold Flaretool
Chargehose Sizeadjustmentgauge
Gas leak detector Vacuum pump adapter
Torquewrench Electronicrefrigerantchargingscale
Besuretousethecorrecttools.Ifdust,debris,ormoistureenterstherefrigerantlines,refrigerationoildeteriorationmayresult.
Donotuseachargingcylinder,acylindricalmeasuringcontainer,whenchargingR410Arefrigerantgas.Iftherefrigerantgasistransferredtoachargingcylinder,
thecompositionoftherefrigerantwillchangeandsystemefciencywillbereduced.
Asforthehandlingofrefrigerant,refertotheoutdoorunitinstallationmanual.
OCH590B

Gravimeter
Unit
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 refrigerant cylinder
·Checkthatrefrigerant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.)
[3] Service tools
Use the service tools below 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5.3MPa·Gorover.
2Chargehose ·OnlyforR410A
·Usepressureperformanceof5.09MPa·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 —
OCH590B

6
SPECIFICATIONS
3
Model name (Service Ref.) EHSE-YM9EC.UK EHSE-MEC.UK ERSE-YM9EC.UK ERSE-MEC.UK
Overall unit dimensions 950×600×360mm(Height×Width×Depth)
Weight(empty) 62kg 60kg 63kg 61kg
Weight(full) 72kg 70kg 73kg 71kg
Watervolumeofheatingcircuitintheunit 10kg
Coolingmode NOT available Available
Unvented expansion
vessel(Primaryheating)
Nominal volume —
Chargepressure —
Safety
device
Water
circuit
(Primary)
Control thermistor 1–80°C
Pressurereliefvalve 0.3MPa(3bar)
Flowsensor Min.ow5.0L/min
Booster
heater
Manual reset thermostat 90°C —90°C —
ThermalCut-out(fordryrunprevention) 121°C —121°C —
PrimarycircuitcirculatingPump GrundfosUPMXLGE025-125180PWM
Connections
Water G1-1/2
Refrigerant(R410A) Liquid 3/8F
Gas 3/4F
Targettemperature
range
Flowtemperature Heating 25–60°C
Cooling —5–25°C
Room temperature Heating 10–30°C
Cooling — NOT available
Guaranteedoperating
range
Ambient*10–35°C( 80%RH)
Outdoor temperature
Heating See outdoor unit spec table.
Cooling —See outdoor unit spec table
(min.10°C).*2
Electrical data
Control board
Powersupply
(Phase,voltage,frequency) ~/N,230V,50Hz
Breaker(whenpowered
fromindependentsource) 10A
Booster heater
Powersupply
(Phase,voltage,frequency)
3~,400V,
50Hz —3~,400V,
50Hz —
Capacity 3kW+6kW —3kW+6kW —
Current 13A —13A —
Breaker 16A —16A —
Sound level 30dB(A)
Optional extras
●WirelessRemoteController PAR-WT50R-E ● Tankthermistor(THW5)(30m) PAC-TH011TKL-E
●WirelessReceiver PAR-WR51R-E ●Thermistor PAC-TH011-E
●RemoteSensor PAC-SE41TS-E ●Hightemperaturethermistor PAC-TH011HT-E
●
Tankthermistor(THW5)(5m) PAC-TH011TK-E ●ecodanWi-FiInterface PAC-WF010-E
●Jointpipe MAC-A454JP-E
*1Theenvironmentmustbefrost-free.
*2Coolingmodeisnotavailableinlowoutdoortemperature.
 Ifyouuseoursystemincoolingmodeatthelowambienttemperature(10°Corbelow),therearesomerisksofplateheatexchangerbreakingbyfrozenwater.
OCH590B

7
Model name (Service Ref.) EHSE-YM9ECR1.UK EHSE-MECR1.UK ERSE-YM9ECR1.UK ERSE-MECR1.UK
Overall unit dimensions 950×600×360mm(Height×Width×Depth)
Weight(empty) 62kg 60kg 63kg 61kg
Weight(full) 72kg 70kg 73kg 71kg
Watervolumeofheatingcircuitintheunit 10kg
Coolingmode NOT available Available
Unvented expansion
vessel(Primaryheating)
Nominal volume —
Chargepressure —
Safety
device
Water
circuit
(Primary)
Control thermistor 1–80°C
Pressurereliefvalve 0.3MPa(3bar)
Flowsensor Min.ow5.0L/min
Booster
heater
Manual reset thermostat 90°C —90°C —
ThermalCut-out(fordryrunprevention) 121°C —121°C —
PrimarycircuitcirculatingPump GrundfosUPMXLGE025-125180PWM
Connections
Water G1-1/2
Refrigerant(R410A) Liquid 3/8F
Gas 3/4F
Targettemperature
range
Flowtemperature Heating 25–60°C
Cooling —5–25°C
Room temperature Heating 10–30°C
Cooling — NOT available
Guaranteedoperating
range
Ambient*10–35°C( 80%RH)
Outdoor temperature
Heating See outdoor unit spec table.
Cooling —See outdoor unit spec table
(min.10°C).*2
Electrical data
Control board
Powersupply
(Phase,voltage,frequency) ~/N,230V,50Hz
Breaker(whenpowered
fromindependentsource) 10A
Booster heater
Powersupply
(Phase,voltage,frequency)
3~,400V,
50Hz —3~,400V,
50Hz —
Capacity 3kW+6kW —3kW+6kW —
Current 13A —13A —
Breaker 16A —16A —
Sound pressure level 30dB(A)
Soundpowerlevel 45dB(A)
Optional extras
●WirelessRemoteController PAR-WT50R-E ● Tankthermistor(THW5)(30m) PAC-TH011TKL-E
●WirelessReceiver PAR-WR51R-E ●Thermistor PAC-TH011-E
●RemoteSensor PAC-SE41TS-E ●Hightemperaturethermistor PAC-TH011HT-E
●
Tankthermistor(THW5)(5m) PAC-TH011TK-E ●ecodanWi-FiInterface PAC-WF010-E
●Jointpipe MAC-A454JP-E
*1Theenvironmentmustbefrost-free.
*2Coolingmodeisnotavailableinlowoutdoortemperature.
 Ifyouuseoursystemincoolingmodeatthelowambienttemperature(10°Corbelow),therearesomerisksofplateheatexchangerbreakingbyfrozenwater.
OCH590B

8
PARTS NAMES AND FUNCTIONS
4
11
7
8
<E*SE-*M*EC>
1
2
9
10
3
4
5
12
13
6
No. Partsname EHSE-*M*EC ERSE-*M*EC
1 Control and electrical box
2 Main remote controller
3Plateheatexchanger
(Refrigerant-Water)
4 Watercirculationpump1
5 Pumpvalve
6 Draincock(Primarycircuit)
7Booster heater 1,2
8 Flowsensor
9 Manometer
10 Pressurereliefvalve(3bar)
11 Automaticairvent
12 Strainer valve
13 Drain pan —
OCH590B

9
OUTLINES AND DIMENSIONS
5
Unit: mm
5-1. Technical Drawings
a
)
(
600
100±5 950
592
260
541
492
367
249
187
163
124
86
48
291
263
242
124
110
357
( 348 )
( 242 )
110
( 187 )
( 187 )
()
260
592
950100±5
40
600
48 86
124
163
187 249
367
300
492
541
110
124
193
242
263
291
( 348 )
357
a
( 232 )
110
<EHS*> (Heating system)
<Front>
Automaticairvent
Frontpanel
Earthleakage
circuit breaker
Terminal bed
Main remote controller
Pressurereliefvalve
G1/2
Back panel
support
Hook
<View from below>
<Side> <Rear>
<ERS*> (Heating and cooling system)
Manometer
Left:Powersupplywiring
(Indoorunitindependent
powersupply)
Right:Indoor/outdoorwiring
Spaceheatingflow
(ISO228-1G1-1/2-B)
Spaceheatingreturn
(ISO228-1G1-1/2-B)
Refrigerant(Liquid3/8)
Refrigerant(Gas)
*Refertodetailviewa.
Addanaccessoryto
refrigerantGASPIPE.
(FLARING)3/4F
Refrigerant(Gas)con-
nection(BRAZING)
I.D.ø25.4
Detailviewa
<Front>
Automaticairvent
Frontpanel
Earthleakage
circuit breaker
Terminal bed
Main remote controller
Pressurereliefvalve
Back panel
support
Hook
<View from below>
<Side> <Rear>
Manometer
Left:Powersupplywiring
(Indoorunitindependent
powersupply)
Right:Indoor/outdoorwiring
Spaceheatingflow
(ISO228-1G1-1/2-B)
Spaceheatingreturn
(ISO228-1G1-1/2-B)
Refrigerant(Liquid3/8)
Refrigerant(Gas)
*Refertodetailviewa.
Addanaccessoryto
refrigerantGASPIPE.
(FLARING)3/4F
Refrigerant(Gas)con-
nection(BRAZING)
I.D.ø25.4
Detailviewa
F
E
Drain pipe
PVCpipe:VP-20[O.D.ø20]
GAB
C D
F
E
AB
C D
Letter Pipe description Connection size/type
A
Spaceheating/IndirectDHWtank(primary)returnconnection G1-1/2-B
B
Spaceheating/IndirectDHWtank(primary)owconnection G1-1/2-B
CRefrigerant(Liquid) 9.52mm/Flare
DRefrigerant(Gas) BrazingconnectionI.D.ø25.4
EDischargepipe(byinstaller)frompressurereliefvalve G1/2female(valveportwithinhydroboxcasing)
F
Electrical cable inlets
Forinlets and ,runhigh-voltagewiresincludingpower
cable,indoor-outdoorcable,andexternaloutputwires.
Forinlets and ,runlow-voltagewiresincludingexternal
inputwiresandthermistorwires.
Forawirelessreceiver(option)cable,useinlet .
GDrain socket O.D.ø20
<Table5-1>
G1/2
OCH590B

10
a
bb
d
c
Service access
5-2. Service access diagrams
Service access
Parameter Dimension(mm)
a200
b150
c500
d500
SufcientspaceMUSTbeleftfortheprovisionofdischargepipeworkasdetailed
inNationalandLocalbuildingregulations.
The hydrobox must be located indoors and in a frost-free environment, for
example in a utility room.
OCH590B