Mitsubishi PUHZ-SW160YKA.UK User manual

SPLIT-TYPE, AIR TO WATER HEAT PUMP
SERVICE MANUAL R410A
Outdoor unit
[Model Name]
PUHZ-SW160YKA
PUHZ-SW200YKA
[Service Ref.]
PUHZ-SW160YKA.UK
PUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW200YKA-BS.UK
PARTS CATALOG (OCB583)
CONTENTS
1. REFERENCE MANUAL ································· 2
2. SAFETY PRECAUTION ································· 2
3. FEATURES····················································· 6
4. SPECIFICATIONS ·········································· 7
5. DATA······························································· 8
6. OUTLINES AND DIMENSIONS ··················· 11
7. WIRING DIAGRAM ······································ 12
8. WIRING SPECIFICATIONS·························· 13
9. REFRIGERANT SYSTEM DIAGRAM ············· 15
10. TROUBLESHOOTING·································· 17
11. DISASSEMBLY PROCEDURE····················· 60

Note:
•Thismanualdescribesservice
dataoftheoutdoorunitsonly.
No. OCH583
March 2015
Salt proof model
PUHZ-SW160YKA-BS
PUHZ-SW200YKA-BS

2
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
INDOOR UNIT SERVICE MANUAL
ModelName ServiceRef. Service
ManualNo.
ERSE-YM9EC
ERSE-MEC
EHSE-YM9EC
EHSE-MEC
ERSE-YM9EC.UK
ERSE-MEC.UK
EHSE-YM9EC.UK
EHSE-MEC.UK
OCH590*
OCB590*
PAC-IF012B-E
PAC-IF021B-E
PAC-IF032B-E
PAC-IF012B-E
PAC-IF021B-E
PAC-IF032B-E
OCB427
PAC-SIF051B-E PAC-SIF051B-E OCB536
PAC-IF061B-E
PAC-IF062B-E
PAC-IF061B-E
PAC-IF062B-E OCB572
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 the air conditioner, turn off
the power-supply beaker.
• 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.
1REFERENCE MANUAL
*TheservicemanualisscheduledtobeissuedonMay2015.
OCH583

3
[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
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.
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.)
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
If large amount of mineral oil enters, that can cause deterio-
ration 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.
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.
Use new refrigerant pipes.
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.
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.
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.
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
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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 specified refrigerant only.
OCH583

4
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
(1) Flowchart
(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
[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 —
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drier.
•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airconditionercanoperate.
Afteroperatingthecoolingsystemforabout30
minutes,doapumpdownwork.
Disconnecttheexistingairconditionerfromthe
pipes.
Attachthenewairconditioner
Theexistingpipescannotbereused.
Usenewpipes.
•Iftheexistingairconditionercannotoperate,usea
refrigerantrecoverydevicetocollecttherefrigerant.
•Incaseexistingpipeswereusedforgasoroil
heatpumpsystems,besuretocleanthepipes.
The existing pipe thickness does not meet
specications or the pipes are damaged.
OCH583

5
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
Dimension A ( )
+0
-0.4 (mm)
(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
Dimension B (mm)
(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
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per-
formance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.
OCH583

6
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT
Maximum 30 m
TherefrigerantcircuitwithLEV(LinearExpansionValve)andpowerreceiver/accumulatoralwayscontroltheoptimalrefrig-
erantlevelregardlessofthelength(30mmaximumand5mminimum)ofpiping.Theadditionalrefrigerantchargingwork
duringinstallation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.
PUHZ-SW160YKA
PUHZ-SW200YKA
PUHZ-SW160YKA-BS
PUHZ-SW200YKA-BS

OCH583

7
4 SPECIFICATIONS
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-SW200YKA.UK
PUHZ-SW200YKA-BS.UK
PUHZ-SW160YKA.UK
PUHZ-SW160YKA-BS.UK
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Propeller fan o2
0.200 + 0.200
140 (4,940)
Reverse cycle
1,050 (41-5/16)
330 + 40 (13+1-9/16)
1,338 (52-11/16)
R410A
Flared
Flared & Brazing
Maximum 30 m
Maximum 80 m
21
4.7
HP switch
Comp. surface thermo
HP sensor
3 phase 50Hz, 400V
OUTDOOR UNIT
REFRIGERANT PIPING
4.7
19
7.1 (15.7)
9.52 (3/8)
25.4 (1)
60
62
7.7 (17.0)
12.7 (1/2)
25.4 (1)
ANB52FRNMT
2.30 (FVC68D)
136 (299.88)
58
62
OCH583

8
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A: kg)
Service Ref.
Compressor model
(at 20°C)
U-V
U-W
W-V
Winding
Resistance
( ")
0.30
0.30
0.30
ANB52FRNMT
PUHZ-SW160/200YKA.UK
PUHZ-SW160/200YKA-BS.UK
Additionalchargeisrequiredforpipeslonger
than30m.
Service Ref. Pipinglength(oneway) Initial
charged
10m 20m 30m 40m 50m 60m 70m
PUHZ-SW160YKA.UK
PUHZ-SW160YKA-BS.UK
6.5 6.8 7.1 +0.9(8.0) +1.8(8.9) +2.7(9.8) +3.6(10.7) 7.1
PUHZ-SW200YKA.UK
PUHZ-SW200YKA-BS.UK
6.9 7.3 7.7 +1.2(8.9) +2.4(10.1) +3.6(11.3) +4.8(12.5) 7.7
5-3. COMPRESSOR TECHNICAL DATA
5-2. ADJUSTING THE AMOUNT OF REFRIGERANT
Amount of additional refrigerant charge (kg)
30 m and less 31–40 m and less 41–50 m and less 51–60 m and less 61–70 m and less 71–80 m and less
0.9 kg 1.8 kg 2.7 kg 3.6 kg
1.2 kg 2.4 kg 3.6 kg 4.8 kg
Service Ref. Permitted
pipe length
PUHZ-SW160YKA.UK
80 m or less
Initial charge
(kg)
7.1
7.7
No additional
charge necessary
The additional charge
amount is obtained by
the following formula.
Main piping:
Liquid line size
[9.52 overall length [m]
o
0.09 [kg/m]
Branch piping: Liquid
line size
[9.52 overall length [m]
o0.06 [kg/m]
Branch piping: Liquid
line size
[6.35 overall length [m]
o0.02 [kg/m]
3.6 (kg)
Amount of additional
charge [kg]
Main piping:
Liquid line size
[12.7 over all length [m]
o0.11 [kg/m]
=
Additional charge amount
for 70 m
SW160 3.6 kg
SW200 4.8 kg
+++ –
Calculate the additional charge amount based on the following procedure.
If the calculation results in an amount that is smaller than the "Additional charge amount for 70 m," perform the additional charge using the amount shown
in "Additional charge amount for 70 m."
PUHZ-SW160YKA-BS.UK
PUHZ-SW200YKA.UK
PUHZ-SW200YKA-BS.UK
OCH583

9
5-4. 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
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SW160YKA.UK
PUHZ-SW160YKA-BS.UK
COOLING
MODE
HEATING
58
SPL(dB)
62
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)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SW200YKA.UK
PUHZ-SW200YKA-BS.UK
COOLING
MODE
HEATING
60
SPL(dB)
62
LINE
OCH583

10
5-5. <REFERENCE DATA> PLATE HEAT EXCHANGER (ACH70-74 PLATES)
Nominal water ow L/min 63.1
Heating
(A7/W35)
Capacity kW 22.0
COP 4.20
Powerinput kW 5.238
Heating
(A7/W45)
Capacity kW 22.0
COP 3.25
Powerinput kW 6.769
Heating
(A2/W35)
Capacity kW 16.0
COP 3.11
Powerinput kW 5.144
Heating
(A2/W45)
Capacity kW 16.0
COP 2.36
Powerinput kW 6.779
Nominal water ow L/min 45.9
Cooling
(A35/W7)
Capacity kW 16.0
EER 2.35
Powerinput kW 6.808
Cooling
(A35/W18)
Capacity kW 18.0
EER 4.28
Powerinput kW 4.205
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doNOTcontainthe"pumpinput(basedonEN14511)".
(SW160)
Nominal water ow L/min 71.7
Heating
(A7/W35)
Capacity kW 25.0
COP 4.00
Powerinput kW 6.250
Heating
(A7/W45)
Capacity kW 25.0
COP 3.10
Powerinput kW 8.064
Heating
(A2/W35)
Capacity kW 20.0
COP 2.80
Powerinput kW 7.142
Heating
(A2/W45)
Capacity kW 20.0
COP 2.20
Powerinput kW 9.090
Nominal water ow L/min 57.3
Cooling
(A35/W7)
Capacity kW 20.0
EER 2.25
Powerinput kW 8.888
Cooling
(A35/W18)
Capacity kW 22.0
EER 4.10
Powerinput kW 5.365
(SW200)
OCH583

11
Unit: mm
6OUTLINES AND DIMENSIONS
PUHZ-SW160YKA.UK PUHZ-SW160YKA-BS.UK
PUHZ-SW200YKA.UK PUHZ-SW200YKA-BS.UK
PUHZ-SW160YKA.UK
PUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW200YKA-BS.UK
OCH583

12
PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK
Terminal Block <Power Supply>
Terminal Block <Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
High Pressure Sensor
Thermistor <Liquid>
Thermistor <2-Phase Pipe>
Thermistor <Ambient>
Thermistor <Heat Sink>
Thermistor <Comp. Surface>
Linear Expansion Valve
Reactor
Reactor
Rush Current Protect Resistor
Fuse <T15AL250V>
P.B.
N.F.
C.B.
TB-U/V/W
TB-L1/L2/L3
TB-P1/P3
X52CA/B
LI1/LI2/LI3/NI
LO1/LO2/LO3
GD1, GD2
SW1
SW4
SW5
SW6
SW7
Power Circuit Board
Connection Terminal <U/V/W-Phase>
Connection Terminal <L1/L2/L3-Power Supply>
Connection Terminal
52C Relay
Noise Filter Circuit Board
Connection Terminal <L1/L2/L3/N-Power Supply>
Connection Terminal <L1/L2/L3-Power Supply>
Connection Terminal <Ground>
Controller Circuit Board
Switch <Manual Defrost, Defect History,
Record Reset, Refrigerant Address>
Switch <Test Operation>
Switch <Function Switch, Model Select>
Switch <Model Select>
Switch <Function Switch>
SW8
SW9
SWP
CN31
CN3S
CNDM
CN51
SV1
SS
CNM
LED1, LED2
F3, F4
X51, X52, X54
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>
Connector <Connection for Option>
LED <Operation Inspection Indicators>
Fuse <T6.3AL250V>
Relay
SYMBOL
TB1
TB2
MC
MF1, MF2
21S4
63H
63HS
TH3
TH6
TH7
TH8
TH32
LEV-A
ACL4
DCL
RS
FUSE1, FUSE2
CapacitorCY1, CY2
SYMBOL SYMBOLNAME NAME NAME
CNDC
(PNK)
TRANS
3
1
MF1
CNF1
(WHT)
17
MS
3~
MF2
CNF2
(WHT)
17
2
MS
3~
X54
31
P.B.
U
POWER
SUPPLY
3N ~
400V 50Hz
TB1
VW
RED
WHT
BLK
MC
7
L 1
L 2
L 3
N
N.F.
CNDC
(PNK) 31 CNL
(BLU)
13
CNAC2
(RED)
31
CNCT
(RED) 1 2
LO3
GD1
NI
LI1
LI2
LI3
GD2
S 1
S 2
S 3
2
2ACL4
RED
WHT
BLK
BLU
RED
WHT
BLK
TB2
X52CA RED
BLK
WHT
BLK
YLW
ORN
BRN
TB-P1 TB-P3
RED
GRN/YLW
BLK
BLK
WHT WHT
INDOOR
UNIT
1 2
CN6
(WHT)
1 2
CN5
(RED) CN2 (RED)
1 7 1 2
CN4
(WHT)
TB-U
TB-V
TB-W
L3IN
TB-L2
TB-L1
TH8
t°
RS
RED
MS
3~
22
CY1 CY2
C. B.
TH6TH7 TH3
21S4
t° t° t°
63HS
CNS
(WHT)
CNAC
(WHT)
F3
F4 21S4
(GRN)
CN2
(RED)
CN4
(WHT)
SW5
TH7/6
(RED) TH3 (WHT)
SW8
SW6SW1
SW7SW9
CN31
X52
63H
(YLW)
2
7
* 1
1 4 1 2
1 3
1 2
17
1
3
1 2
34
31 SV1
(GRY)
63HS
(WHT)
31
SS
(WHT)
X51
31
CNF1
(WHT)
63H LEV-A
LEV-A
(WHT)
51
M
CN3S
(WHT) 3
1
CNDM
(WHT)
CN51
(WHT)
3
1
5
1
1 2
TH32
(BLK)
TH32
t°
LED1 LED2
SWP
SW4
* 1
TB-L3
X52CB
L3OUT
FUSE1
FUSE2
WHT
RED
WHT
RED
DCL
CNAC1
(WHT) 31
LO1
LO2
CNM
(WHT)
1 14
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6
OFF
ON
SW6 MODEL SW5-6 *2
160Y
200Y
The black square (■) indicates a switch position.
*1. MODEL SELECT
*2. SW5-1 to 5: Function switch
7WIRING DIAGRAM
OCH583

13
8WIRING SPECIFICATIONS
8-1. 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
Indoor Unit
Outdoorunitmodel SW160/200
Outdoorunitpowersupply 3N~(3ph4-wires),50Hz,400V
Outdoorunitinputcapacitymainswitch(Breaker) *1 32 A
Wiring
WireNo.×
size(mm²)
Outdoorunitpowersupply 5×Min.4
Indoorunit-Outdoorunit *2 Cablelength50m:3×4(Polar)/
Cablelength80m:3×6(Polar)
Indoorunit-Outdoorunitearth *2 1×Min.2.5
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pole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80mTotalMax.includingallindoor/indoorconnectionis80m.
 •UseonecableforS1andS2,andanotherforS3asshowninthepicture.
*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.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2.
Power supply cables and the cables between indoor and outdoor unit shall not be lighter than polychloroprene sheathed exible cables. (Design
60245 IEC 57
)
3. Be sure to connect the cables between
Iindoor 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 insufcient
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.
OCH583

14
8-2. INDOOR – OUTDOOR CONNECTING CABLE
The cable shall not be lighter than design 60245 IEC or 60227 IEC.
Note: The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.
Indoor unit-Outdoor unit
Outdoor power supply
Max. 45 m
3 o1.5 (polar)
1 oMin. 1.5
Max. 50 m
3 o2.5 (polar)
1 oMin. 2.5
Max. 80 m
3 o2.5 (polar) and S3 separated
1 oMin. 2.5
Indoor unit-Outdoor unit earth
Wire No. oSize (mm²)
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient
insulation to ground or a poor electrical contact at the intermediate connection point.
Indoor unit-Outdoor unit
Indoor/Outdoor separate
power supply Max. 120 m
2 oMin. 0.3
—
Indoor unit-Outdoor unit earth
Wire No. oSize (mm²)
Note: The optional indoor power supply terminal kit is necessary.
Cross section of cable Wire size (mm2)Number of wires Polarity L (m)*5
Round 2.5 3 Clockwise : S1-S2-S3
(Pay attention to stripe of yellow and green.)
(30)
*1
Flat 2.5 3 Not applicable
(since center wire has no cover finish.)
Not applicable
*4
Flat 1.5 4 From left to right : S1-Open-S2-S3 (18)
*2
Round 2.5 4 Clockwise : S1-S2-S3-Open
(Connect S1 nad S3 to the opposite angle.)
(30)
*3
Note: Power supply cords of appliances shall not be lighter than design 60245 IEC or
227 IEC.
*1 In case that cable with stripe of yellow and green is available.
*2 In case of regular polarity connection (S1-S2-S3), wire size is 1.5 mm2.
*3 In case of regular polarity connection (S1-S2-S3).
*4 In the flat cables are connected as this picture, they can be used up to 30 m.
*5 Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, humidity or
materials, etc.
(3C Flat cable × 2)
S1 S3S2
OCH583

15
Unit : mm (in)
9REFRIGERANT SYSTEM DIAGRAM
Heat exchanger
Thermistor TH6
(2-phase pipe)
Thermistor TH7
(Ambient)
Distributor
Accumulator
Compressor
Refrigerant GAS pipe
connection [25.4([1 inch)
Refrigerant LIQUID pipe
SW160 : connection [9.52([3/8 inch)
SW200 : connection [12.7([1/2 inch)
Stop valve
(with service port)
4-way valve
Linear expansion valve A
Thermistor TH32
(Comp. surface)
Muffler
Ball valve
#50
Strainer
Oil return hole
with strainer #40
Strainer
#100
Strainer
#100
Strainer
#100
Refrigerant flow in cooling
Refrigerant flow in heating
Charge plug
(High pressure)
<Blazing>
Thermistor TH8
(Control protection)
HEX
Stop valve
Thermistor TH3
(Liquid)
LEV-A
High pressure
switch 63H
Charge plug
(Low pressure)
High pressure
sensor 63HS
PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK
9-1. REFRIGERANT SYSTEM DIAGRAM
OCH583

16
9-2. REFRIGERANT COLLECTING (PUMP DOWN)
Whenrelocatingordisposingoftheindoor/outdoorunit,pumpdownthesystemfollowingtheprocedurebelowsothatnorefriger-
antisreleasedintotheatmosphere.
1Turnoffthepowersupply(circuitbreaker).
2Connectthelow-pressurevalveonthegaugemanifoldtothechargeplug(lowpressureside)ontheoutdoorunit.
3Closetheliquidstopvalvecompletely.
4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.
5Performtherefrigerantcollectingoperation(coolingtestrun).
•Pushthepump-downSWPswitch(push-buttontype)onthecontrolboardoftheoutdoorunit.Thecompressorandventilators
(indoorandoutdoorunits)startoperating(refrigerantcollectingoperationbegins).(LED1andLED2onthecontrolboardof
theoutdoorunitarelit.)
•Onlypushthepump-downSWPswitchiftheunitisstopped.However,eveniftheunitisstoppedandthepump-downSWP
switchispushedlessthan3minutesafterthecompressorstops,therefrigerantcollectingoperationcannotbeperformed.
Waituntilthecompressorhasbeenstoppedfor3minutesandthenpushthepump-downSWPswitchagain.
6Fullyclosetheballvalveonthegaspipesideoftheoutdoorunitwhenthepressuregaugeonthegaugemanifoldshows0.05
to0MPa[Gauge](approx.0.5to0kgf/cm²)andquicklystoptheairconditioner.
•Becausetheunitautomaticallystopsinabout3minuteswhentherefrigerantcollectingoperationiscompleted(LED1off,
LED2lit),besuretoquicklyclosethegasballvalve.However,ifLED1islit,LED2isoff,andtheunitisstopped,openthe
liquidstopvalvecompletely,closethevalvecompletelyafter3minutesormorehavepassed,andthenrepeatstep5.(Open
thegasballvalvecompletely.)
•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.
•Notethatwhentheextensionpipingisverylongwithalargerefrigerantamount,itmaynotbepossibletoperformapump-
downoperation.Inthiscase,userefrigerantrecoveryequipmenttocollectalloftherefrigerantinthesystem.
7Turnoffthepowersupply(circuitbreaker),removethegaugemanifold,andthendisconnecttherefrigerantpipes.
Warning:
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
• If the refrigerant pipes are disconnected while the compressor is operating and the stop valve (ball valve) is open, the
pressure in the refrigeration cycle could become extremely high if air is drawn in, causing the pipes to burst, personal
injury, etc.
Note: This section is applicable only for PAC-IF061/062B-E/PAC-SIF051B-E or later models.
OCH583

17
10 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wiredremotecontrollerandcontrolboardofout-
doorunit.Actionstobetakenforservice,whichdependsonwhetherornotthetroubleisreoccurringinthefield,aresumma-
rizedinthetablebelow.Checkthecontentsbelowbeforeinvestigatingdetails.
10-1. TROUBLESHOOTING
Unit conditions at service Check code Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action according
to “10-2. SELF-DIAGNOSIS ACTION TABLE”.
Conduct trouble shooting and ascertain the cause of the
trouble according to “10-3. TROUBLESHOOTING OF
PROBLEMS”.
The trouble is not reoccurring.
Logged
Not logged
1Consider 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.
2Reset check code logs and restart the unit after finishing
service.
3There is no abnormality in electrical component,
controller board, remote controller, etc.
1Re-check the abnormal symptom.
2Conduct trouble shooting and ascertain the cause of the
trouble
according to “10-3. TROUBLESHOOTING OF
PROBLEMS”.
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.
OCH583

18
10-2. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is put on> Note:RefertoindoorunitsectionforcodesstartingwithPandE.
Check Code Abnormal points and detection method
Case Judgment and action
None —
1Novoltageissuppliedtotermi-
nalblock(TB1)ofoutdoorunit.
a)Powersupplybreakeris
turnedoff.
b)Contactfailureordisconnec-
tionofpowersupplyterminal
c)Openphase(L2orNphase)
2Electricpowerisnotsupplied
topowersupplyterminalofout-
door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(ACL4)
5Disconnectionofoutdoornoise
filtercircuitboardorpartsfail-
ureinoutdoornoisefiltercircuit
board
6Defectiveoutdoorpowercircuit
board
7Openofrushcurrentprotect
resistor(RS)
8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.
3Check connectionoftheconnector(CNDC)
ontheoutdoorcontrollercircuitboard.
 Check connectionoftheconnectorCNDC
 onthenoisefiltercircuitboard.Referto"10-
6.TESTPOINTDIAGRAM".
4Check connectionofreactor.(
ACL4 )
 Referto"8.WIRINGDIAGRAM".
5a)Checkconnectionofoutdoornoisefilter
circuitboard.
 b)Replaceoutdoornoisefiltercircuitboard.
  Referto"10-6.TESTPOINTDIAGRAM".
6Replaceoutdoorpowercircuitboard.
7Replacerushcurrentprotectresistor(RS)
 Powercircuitboardmightbeshort-circuit.
Checkthepowercircuitboard.(Referto"10-
6.TESTPOINTDIAGRAM".)
8Replacecontrollerboard.(Whenitems
abovearecheckedbuttheunitscannotbe
repaired.)
F5
(5201)
63H connector open
Abnormalif63Hconnectorcircuitisopen
for3minutescontinuouslyafterpowersup-
ply.
63H:High-pressureswitch
1Disconnectionorcontactfailure
of63Hconnectoronoutdoor
controller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.
OCH583

19
Check Code Abnormal points and detection method
Judgment and action
Eb
(6845)
Miswiring of indoor/outdoor unit
connecting wire (converse wiring or
disconnection)
Outdoorcontrollercircuitboardcan
automaticallysettheunitnumberofindoor
units.
Abnormaliftheindoorunitnumbercan
notbesetwithin4minutesafterpower
onbecauseofmiswiring(conversewiring
ordisconnection)ofindoor/outdoorunit
connectingwire.
EC
(6846)
Start-up time over
Theunitcannotfinishstart-upprocess
within4minutesafterpoweron.
Case
1Contactfailureofindoor/
outdoorunitconnectingwire
2Diameterorlengthofindoor/
outdoorunitconnectingwireis
outofspecifiedcapacity.
72ormoreoutdoorunitshave
refrigerantaddress“0”.
 (Incaseofgroupcontrol)
8Noisehasenteredintopower
supplyorindoor/outdoorunit
connectingwire.
1Contactfailureormiswiringof
indoor/outdoorunitconnecting
wire
2Diameterorlengthofindoor/
outdoorunitconnectingwireis
outofspecifiedcapacity.
4Defectivetransmittingreceiving
circuitofoutdoorcontrollercircuit
board
5Defectivetransmittingreceiving
circuitofindoorcontrollerboard
6Defectiveindoorpowerboard
72ormoreoutdoorunitshave
refrigerantaddress“0”.
(Incaseofgroupcontrol)
8Noisehasenteredintopower
supplyorindoor/outdoorunit
connectingwire.
Miswiring of indoor/outdoor unit
connecting wire
1.Outdoorcontrollercircuitboardcan
automaticallycheckthenumberof
connectedindoorunits.Abnormalifthe
numbercannotbecheckedautomatically
duetomiswiringofindoor/outdoorunit
connectingwire,etc.afterpoweris
turnedonfor4minutes.
2.Abnormalifoutdoorcontrollercircuit
boardrecognizesexcessivenumberof
indoorunits.
1Checkdisconnectionorloosenessorpolarity
ofindoor/outdoorunitconnectingwireof
indoorandoutdoorunits.
2Checkdiameterandlengthofindoor/outdoor
unitconnectingwire.
 Totalwiringlength:80m
(includingwiringconnectingeachindoorunit
andbetweenindoorandoutdoorunit)
Alsocheckiftheconnectionorderofflat
cableisS1,S2,S3.
3Checkthenumberofindoorunitsthatare
connectedtooneoutdoorunit.(IfEAis
detected)
4–6Turnthepoweroffonce,andonagainto
check.
Replaceoutdoorcontrollercircuitboard,
indoorcontrollerboardorindoorpower
boardifabnormalityoccursagain.
7Checkifrefrigerantaddresses(SW1-3to
SW1-6onoutdoorcontrollercircuitboard)are
overlappingincaseofgroupcontrolsystem.
8Checktransmissionpath,andremovethe
cause.
Note:
Thedescriptionsabove,1–8,areforEA,Eb
andEC.
1Contactfailureormiswiringof
indoor/outdoorunitconnecting
wire
2Diameterorlengthofindoor/
outdoorunitconnectingwireis
outofspecifiedcapacity.
3Excessivenumberofindoor
unitsareconnectedto1out-
doorunit.
4Defectivetransmittingreceiving
circuitofoutdoorcontroller
circuitboard
5Defectivetransmittingreceiving
circuitofindoorcontrollerboard
6Defectiveindoorpowerboard
72ormoreoutdoorunitshave
refrigerantaddress“0”.
 (Incaseofgroupcontrol)
8Noisehasenteredintopower
supplyorindoor/outdoorunit
connectingwire.
EA
(6844)
OCH583

20
Check Code Abnormal points and detection method
Judgment and action
U1
(1302)
High pressure (High-pressure switch
63H operated)
Abnormalifhigh-pressureswitch63H
(4.15MPa)operatedduringcompressor
operation.
1Decreasedwaterflow
2Cloggedfilterofwaterpipe
3Lockedwaterpump
4Malfunctionofwaterpump
5Dirtofindoorheatexchanger
6Defectiveoperationofstop
valve(Notfullopen)
7Cloggedorbrokenpipe
8Lockedoutdoorfanmotor
9
Malfunctionofoutdoorfanmotor
0Shortcycleofoutdoorunit
1Dirtofoutdoorheatexchanger
2Decreasedairflowcausedby
defectiveinspectionofoutside
temperaturethermistor
 (Itdetectslowertemperature
thanactualtemperature.)
3Disconnectionorcontactfailure
ofconnector(63H)onoutdoor
controllerboard
4Disconnectionorcontactfailure
of63Hconnection
5 Defectiveoutdoorcontrollerboard
6Defectiveactionoflinear
expansionvalve
7Malfunctionoffandrivingcircuit
1−5Checkwatercircuitandrepairdefect.
6Checkifstopvalveisfullyopen.
7Checkpipingandrepairdefect.
8−1Checkoutdoorunitandrepairdefect.
2Checkthedetectedtemperatureofoutside
temperaturethermistoronLEDdisplay.
 (SW2onA-ControlServiceTool:Refer
to "10-7.FUNCTIONOFSWITCHES,
CONNECTORSANDJUMPERS".)
3−5TurnthepoweroffandcheckifF5is
displayedwhenthepoweristurnedon
again.
 WhenF5isdisplayed,referto“Judgment
andaction”forF5.
6Checklinearexpansionvalve.
Referto"10-4.HOWTOCHECKTHEPARTS" .
7Replaceoutdoorcontrollerboard.
Case
U2
(TH32:1132)
High comp. surface temperature
(1)
Abnormalifcomp.surfacethermistor(TH32)
exceeds125°C or115°Ccontinuouslyfor
5minutes.
Abnormalifcomp.surfacethermistor(TH32)
exceeds110°Cormorecontinuouslyfor
30secondsafter90secondshavepassed
sincethedefrostingoperationstarted.
(2)Abnormalifdischargesuperheat
(Cooling:TH32−T63HS
Heating:TH32−T63HS )increases.
AlltheconditionsinAorBaredetected
simultaneouslyfor10minutescontinu-
ouslyafter6minutespastfromcompres-
sorstart-up(includingthethermostat
indicationorrecoveryfromdefrosting).
<ConditionA>
•Heatingmode
•Whendischargesuperheatislessthan
70 °C .
•WhentheTH6tempismorethanthe
valueobtainedbyTH7−5:.
•WhenthecondensingtempofTH5is
lessthan35:.
<ConditionB>
•Duringcompressoroperation(Cooling
andHeating)
•Whendischargesuperheatislessthan
80 °C inCooling.
•Whendischargesuperheatislessthan
90 °C inHeating.
•WhencondensingtempofTH6is
morethan−40:.(InCoolingonly.)
1Overheatedcompressor
operationcausedbyshortage
ofrefrigerant
2Defectiveoperationofstop
valve
3Defectivethermistor
4Defectiveoutdoorcontroller
board
5Defectiveactionoflinear
expansionvalve
1Checkintakesuperheat.
 Checkleakageofrefrigerant.
 Chargeadditionalrefrigerant.
2Checkifstopvalveisfullyopen.
34TurnthepoweroffandcheckifU3is
displayedwhenthepowerisonagain.
 WhenU3isdisplayed,referto“Judgement
andaction”forU3.
5Checklinearexpansionvalve.
 Referto"10-4.HOWTOCHECKTHE
PARTS".
<Abnormalities detected while unit is operating>
U3
(TH32:5132)
Open/short circuit of comp. surface
thermistor (TH32)
Abnormalifopen(−20°Corless)or
short(217°Cormore)isdetectedduring
compressoroperation.
(Detectionisinoperativefor10minutes
ofcompressorstartingprocessandfor10
minutesafterandduringdefrosting.)
1Disconnectionorcontactfailure
ofconnector(TH32)onthe
outdoorcontrollercircuitboard
2Defectivethermistor
3Defectiveoutdoorcontroller
circuitboard
1
Checkconnectionofconnector(TH32)onthe
outdoorcontrollercircuitboard.Checkbreaking
oftheleadwireforthermistor TH32).Referto
"10-6.TESTPOINTDIAGRAM".
2 Checkresistancevalueofthermistor(TH32)
ortemperaturebymicroprocessor.(Thermistor/
TH32:Referto"10-4.HOWTOCHECKTHE
PARTS".)(SW2onA-ControlServiceTool:
Referto"10-7.FUNCTIONOFSWITCHES,
CONNECTORSANDJUMPERS".)
3Replaceoutdoorcontrollerboard.
OCH583