Mitsubishi Electric Mr. Slim PUHZ-RP8YHA Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. SAFETY PRECAUTION·······································2
2. COMBINATION OF INDOOR AND OUTDOOR UNITS ····6
3. FEATURES···························································7
4. SPECIFICATIONS················································8
5. DATA ····································································9
6. OUTLINES AND DIMENSIONS·························11
7. WIRING DIAGRAM············································12
8. WIRING SPECIFICATIONS ·······························13
9. SPECIFICATIONS FOR ELECTRICAL WORK····14
10. REFRIGERANT SYSTEM DIAGRAM ···················17
11. CAPACITY CURVES ··········································18
12.APPLICABLE EXTENSION PIPE FOR EACH MODEL···19
13. TROUBLESHOOTING········································25
14. DISASSEMBLY PROCEDURE ··························71
15. PARTS LIST ·······················································79
16. OPTIONAL PARTS······························BackCover
No.OC317
R410A
Outdoor unit
[model names]
PUHZ-RP8YHA
PUHZ-RP10YHA
[Service Ref.]
PUHZ-RP8YHA
PUHZ-RP10YHA
Model name
indication
PUHZ-RP8YHA
PUHZ-RP10YHA
OC317-1.qxp 04.11.26 9:33 AM Page 1

2
1 SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
1-1. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
In case of using the existing pipes for R22, be careful with
the followings.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
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.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Keep the tools with care.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enter, 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.
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3
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Specifications
1Gauge manifold ·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check ·Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment
[1] Cautions for service
(1) Perform service after collecting the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
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4
1-2. CHANGED POINT
• Precautions when reusing existing R22 refrigerant pipes
(1) Flowchart
Connecting a new air conditioner to existing R22 refrigerant pipes
1Flare the pipe for the use with R410A refrigerant.
Use the flare nut attached to indoor and outdoor unit of the new air conditioner only.
2When reusing existing R22 refrigerant pipes of which gas pipe is [28.58mm and, in addition, when the outdoor unit is
installed to lower position than the indoor unit, be sure to change the setting of the DIP SW8-1 on the controller circuit
board of the outdoor unit to ON.
✽ This is to increase the speed of refrigerant passing in the gas pipe so that refrigerant oil can smoothly flow in the system.
• Use a different-diameter joint or brazing for the connection.
3When reusing standard-size existing R22 refrigerant pipes.
The pipes can be reused with pipe length restriction described on 12-1.
Measuretheexistingpipethicknessandcheck
for damage.
The existing pipe thickness meets specifi-
cations and the pipes are not damaged. The existing pipe thickness does not meet specifications or the pipes are damaged.
Check if the existing air conditioner can operate.
The existing air conditioner can operate. The existing air conditioner cannot operate.
After operating the cooling system for about
30 minutes, do a pump down work. Use a refrigerant collecting device to collect the refrigerant.
Check the oil condition when collecting the refrigerant.
Oil is clean. (Clear to brownish color) Oil is dirty. (Black color)
When the compressor bearings are
glazed,rotation scratchesare present,
or the compressor breaks down, iron
particlesor oildeteriorationwill blacken
the oil.
Disconnect the existing air conditioner from
the pipes.
The existing piping can be reused.
After flaring the pipes again, connect the
new air conditioner. The existing pipes cannot be reused.
Use new pipes.
Perform the following inspections: air
tightness test, vacuum dryness (additional
refrigerant charge), gas leakage check
Replacement operation
Test operation
Replacement operation is the operation by which impurities remaining in
the existing piping (chlorinated compounds) are captured by the activated
carbon filter (replacement filter) in the outdoor unit.
• This model will automatically begin the replacement operation after it has been
installed when it enters the initialization phase for normal heating or cooling. How-
ever, the unit will not automatically perform the replacement operation if it is moved
to a new location where it will be used with existing R22 refrigerant piping. Under
such conditions, always use the SW8-2 operations to perform the replacement
operation before beginning the test operation.
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5
(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 time higher than that of R22, their sizes of flared sections and flare nuts are different.
1Thickness of pipes
Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness
shown below. (Never use pipes of 0.7mm or below.)
2Dimensions of flare cutting and flare nut
The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that,
R410A is a refrigerant, which has higher risk of leakage because of its working pressure higher than that of other refriger-
ants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been speci-
fied separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also
have partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring
dimensions for R410A below. For 1/2” and 5/8”, the dimension B changes.
Use torque wrench corresponding to each dimension.
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
1/4”
3/8”
1/2”
5/8”
3/4”
7/8”
1”
1”-1/8”
6.35
9.52
12.70
15.88
19.05
22.20
25.40
28.58
0.8
0.8
0.8
1.0
—
—
—
—
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
Nominal
dimensions
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness (mm)
R410A R22
1/4”
3/8”
1/2”
5/8”
3/4”
6.35
9.52
12.70
15.88
19.05
9.1
13.2
16.6
19.7
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions
Flare cutting dimensions
Outside
diameter Dimension A ( )
+0
-0.4
(mm)
R410A R22
1/4”
3/8”
1/2”
5/8”
3/4”
6.35
9.52
12.70
15.88
19.05
17.0
22.0
26.0
29.0
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions
Flare nut dimensions
Outside
diameter Dimension B (mm)
R410A
w
w36.0mm for
indoor unit
of RP4, 5
and 6
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 and refrigerant charge
Operation check and the two above
Gas leak check
Collection of refrigerant
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
Charge refrigerant
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
gerant to thermistor vacuum gauge)
Charge refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil and alkylbenzene
oil (minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adop-
ter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil:
Alkylbenzene oil: minimum amount
(Usable if equipped
with adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
Dimension A
Dimension B
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6
2COMBINATION OF INDOOR AND OUTDOOR UNITS
Indoor unit Outdoor unit PUHZ-RP·YHA
810
PEH-RP·MYA
Indoor unit Outdoor unit PUHZ-RP·YHA
810
PLA-RP4AA ✕ 2
PLA-RP5AA ✕ 2
PEAD-RP4EA ✕ 2
PEAD-RP5EA ✕ 2
PEAD-RP4GA ✕ 2
PKA-RP4FAL ✕ 2
PCA-RP4GA ✕ 2
PCA-RP5GA ✕ 2
Indoor unit Outdoor unit PUHZ-RP·YHA
810
PLA-RP2.5AA ✕ 3
PLA-RP3AA ✕ 3
PEAD-RP2.5EA ✕ 3
PEAD-RP3EA ✕ 3
PEAD-RP2.5GA ✕ 3
PEAD-RP3GA ✕ 3
PKA-RP2.5FAL ✕ 3
PKA-RP3FAL ✕ 3
PCA-RP2.5GA ✕ 3
PCA-RP3GA ✕ 3
Indoor unit Outdoor unit PUHZ-RP·YHA
810
PLA-RP2AA ✕ 4
PLA-RP2.5AA ✕ 4
PEAD-RP2EA ✕ 4
PEAD-RP2.5EA ✕ 4
PEAD-RP2.5GA ✕ 4
PKA-RP2GAL ✕ 4
PKA-RP2.5FAL ✕ 4
PCA-RP2GA ✕ 4
PCA-RP2.5GA ✕ 4
Ratio of distributing Part No.
Synchronized twin 50:50 MSDD-50WR-E
Synchronized triple 33:33:33 MSDT-111R-E
Synchronized quadruple 25:25:25:25 MSDF-1111R-E
2-1. 1:1 SYSTEM
2-2. SYNCHRONIZED TWIN, TRIPLE AND QUADRUPLE SYSTEM
(1) Synchronized twin (50:50) (2) Synchronized triple (33:33:33)
(3) Synchronized quadruple (25:25:25:25)
2-3. MULTI DISTRIBUTION PIPE (OPTION)
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7
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
(Max.30m)
The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator always control the optimal refrigerant
level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during
installation often causes problems. Heretofore it is completely eliminated. This unique system improves the quality
and reliability of the work done.It also helps to speed up the installation time.
PUHZ-RP8YHA
PUHZ-RP10YHA
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8
4 SPECIFICATIONS
3-ph, 50Hz, 380-400-415V (4wires)
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
ANV47FFBMT
Line start
HP switch, LP switch, Discharge thermo
—
Plate fin coil
Propeller fan o1
0.635
150(5,300)
Reverse cycle
900(35-7/16)
750(29-17/32)
1,798(70-25/32)
198(436)
R410A
10.5(23.1)
2.30(MEL56)
Flared
Flared & Brazing
Max. 40m
Max. 80m
Btu/h
kW
kW
A
kW
W
kW
K
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Running 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
Function
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Notes1.Rating Conditions (ISO T1)
Cooling :Indoor : D.B. 27˚C(80˚F), W.B. 19˚C(66˚F) Outdoor : D.B. 35˚C(95˚F), W.B. 24˚C(75˚F)
Heating :Indoor : D.B. 20˚C(68˚F) Outdoor : D.B. 7˚C(45˚F), W.B. 6˚C(43˚F)
Refrigerant piping length (one way) : 5m (16ft)
3. Guaranteed voltage
342~457V, 50Hz
4. Above data based on indicated voltage
Indoor Unit 1 phase 230V 50Hz
Outdoor Unit 3 phase 400V 50Hz
5. Refer to the service manual of indoor unit for the indoor unit's specifications.
6. The total input is of twin combination of 4-way cassette.
2. Guaranteed operating range
Upper limit
Lower limit
Upper limit
Lower limit
Indoor
D.B. 35˚C, W.B. 22.5˚C
D.B. 19˚C, W.B. 15˚C
D.B. 28˚C
D.B. 17˚C
Outdoor
D.B. 46˚C
D.B. -5˚C
D.B. 21˚C, W.B. 15˚C
D.B. -20˚C, W.B. -20˚C
Cooling
Heating
Service Ref. Cooling
64,800
19.0(10.0~22.4)
6.76
10.0
4.5
55
56
9.52(3/8)
25.4(1)
Heating
76,400
22.4(10.0~25.0)
6.98
10.4
Cooling
75,000
22.0(12.5~28.0)
7.83
11.5
5.5
58
58
12.7(1/2)
28.58(1-1/8)
Heating
92,100
27.0(15.7~31.5)
8.41
12.4
OUTDOOR UNIT
REFRIGERANT PIPING
PUHZ-RP10YHAPUHZ-RP8YHA
Capacity
Total input
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9
5DATA
Parts name
Outdoor unit
250V 6.3A
ANV47FFBMT
HAM-BD32
(0~480 Pulse)
2.7mH 25A
DC12V
0:/15t, 10:/9.6t, 20:/6.3t, 25:/5.4t, 30:/4.3t, 40:/3.0t
0:/15t, 10:/9.6t, 20:/6.3t, 25:/5.4t, 30:/4.3t, 40:/3.0t
0:/15t, 10:/9.6t, 20:/6.3t, 25:/5.4t, 30:/4.3t, 40:/3.0t
20:/250t, 30:/160t, 40:/104t, 50:/70t, 60:/48t, 70:/34t, 80:/24t, 90:/15t, 100:/13t
6P 635W o1
PA6Y635-T
5P
(L1, L2, L3, N, )
OFF 3.60+0.2MPa
ON 2.80i0.15MPa
OFF -0.03i0.03MPa
ON 0.05i0.04MPa
VT60100
LB64
(DM50G461)
PUHZ-RP8YHA
FUSE
(FUSE3,4)
250V 15A
FUSE
(FUSE1,2)
Solenoid Valve Coil
(Four-way Valve)
21S4
Linear Expansion
Valve
(LEV-A)
Reactor
(DCL)
Motor Compressor
(MC)
High Pressure
Switch
(63H)
Low Pressure
Switch
(63L)
Fan Motor
(MF)
Thermistor
(Discharge)
(TH4)
Thermistor
(Outdoor)
(TH7)
Terminal Block
(Power Supply)
(TB1)
3P
(S1, S2, S3)
Terminal Block
(Indoor / Outdoor)
(TB2)
2200=400V
16"30W
Main Smoothing Capacitor
(CB1, CB2)
Rush Current
Protect Resister
(RS)
Thermistor
(Outdoor Pipe)
(TH3, TH32 )
Thermistor
(Outdoor2-PhasePipe)
(TH6)
Linear Expansion
Valve Coil
(LEV-A)
Solenoid Valve
(Four-way Valve)
VF20100
Solenoid Valve
<Bypass Valve>
LD2
Solenoid Valve Coil
<Bypass Valve>
(SV)
PUHZ-RP10YHA
5-1. ELECTRICAL PARTS SPECIFICATIONS
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10
5-2. COMPRESSOR TECHNICAL DATA
U-V
U-W
W-V
Unit
Compressor model
Winding
Resistance
( ")
ANV47FFBMT
(at 20°C)
0.72
0.72
0.72
PUHZ-RP8, 10YHA
1m
1m
MICROPHONE UNIT
GROUND
5-3. NOISE CRITERION CURVES
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-RP8YHA
COOLING
MODE
HEATING
55.0
SPL(dB)
56.0
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-RP10YHA
COOLING
MODE
HEATING
58.0
SPL(dB)
58.0
LINE
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11
6OUTLINES AND DIMENSIONS
PUHZ-RP8YHA
PUHZ-RP10YHA
0
0
[
7
O.D
[
28.58
2
O.D
[
25.4
[
25.4
2
Refrigerant GAS PIPE connection (BRAZING)
[
12.7 (1/2F)
[
9.52 (3/8F)
1
10YHA
8YHA
Refrigerant LIQUID PIPE connection (FLARE)
1
AIR INTAKE
AIR FLOW
218 375
65
460
Drain Hole(4-[10)
Drain Hole
80
Piping Hole (Knock-OUT)
Indoor/Outdoor Wiring
Power supply Wiring (Earth wiring)
Wiring Hole([ 40 Knock-OUT)
Wiring Hole([ 27 Knock-OUT)
200
94
42 48
(Rear Side)
Service panel
Wiring Hole([ 27 Knock-OUT)
Wiring Hole([ 40 Knock-OUT)
110
Piping Hole([ 122 Knock-OUT)
2
70
150
1
Piping Hole([ 122 Knock-OUT)
Wiring Hole([ 40 Knock-OUT)
200
435 0 364
(780)
(22)
12
28
60
180
65
140
70
120
317
80
123
105
63
161
90
R
15
R
15
900
700~796
560
750
736
900 750
1798 1519 1457 667 0 98
48 152
40
38
191
19
58
21
380
60
780
736
Wiring Hole([ 27 Knock-OUT)
(Front Side)
Service panel
G
L
FOUNDATION BOLTS PITCH & DRAIN HOLES
Front side
Wiring Hole([40 Knock-OUT)
Wiring Hole([27 Knock-OUT)
MITSUBISHI ELECTRIC
Unit : mm
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12
7WIRING DIAGRAM
PUHZ-RP8YHA
PUHZ-RP10YHA
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8WIRING SPECIFICATIONS
✽1 : In case that cable with stripe of yellow and green is available.
✽2 : In the flat cables are connected as this picture, they can be used up to 30m.
✽3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm2.
✽4 : In case of regular polarity connection (S1-S2-S3).
✽5 : Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, humidity or materials, etc.
The cable length may vary depending on the condition of installation, humidity or materials, etc.
When cable length is 30m or more.
Use one cable for S1 and S2 and another for S3 as shown in the picture.
The cable shall not be lighter than design 245 IEC or 227 IEC.
Cross section
of cable
Round 2.5
2.5
1.5
2.5
3
3
4
4
(30)
✽1
(18)
✽3
30
✽4
Not
applicable
✽2
Flat
Flat
Round
Wire size
(mm2)Number
of wires
Clockwise : S1-S2-S3
Clockwise : S1-S2-S3-Open
Connect S1 and S3 to the opposite angle
Not applicable
(Because center wire has no cover finish)
From left to right : S1-Open-S2-S3
Polarity L(m) ✽5
(3C Flat cable ✕2)
S1 S2 S3
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.
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering
the cables.)
S1 S2 S3
wire size :
cable length 50m : 4mm2
cable length 80m : 6mm2
WIRING SPECIFICATIONS FOR 220V-240V 50Hz
(INDOOR - OUTDOOR CONNECTING CABLE)
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14
SPECIFICATIONS FOR ELECTRICAL WORK
9
9-1. FIELD ELECTRICAL WIRING (POWER WIRING SPECIFICATIONS)
PUHZ-RP•YHA
Outdoor unit
Power supply
Phase
Frequency & Voltage
Outdoor unit (A)
Wire No.
32
4
32
4
Models (Outdoor unit) 3N~(3ph 4wires)
50Hz, 380-400-415V
Outdoor unit
Power supply
Input capacity
Main switch/Breaker
Indoor unit/Outdoor unit connecting
Wire No. osize (e)
Remote controller-indoor unit connecting
Wire No. osize (e)
Control circuit rating
Wiring
Cable 2C o0.69
This wire is accessory of remote controller
(Wire length: 10m, Non-polar)
Indoor unit-Outdoor unit: S1-S2 AC220V-230V-240V
S2-S3 DC24V
Remote controller-Indoor unit: DC14V
RP8 RP10
Cable length 50 m : 3 o4 (Polar)
Cable length 80 m : 3 o6 (Polar)
Check items
1. Wiring size must comply with the applicable local and national code.
2. Be careful about choosing the installation location for the earth leakage breaker and how it is installed as the initial electric
current may cause it to malfunction.
3. Power supply cords and indoor unit / Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flex-
ible cord. (design 254 IEC 57)
1
2
S1
S2
S3
S1
S2
S3
Indoor/outdoor
unit connection
cable
Indoor
unit
Unit
power
supply
Outdoor
unit
Remote
controller
L1
L2
L3
N
Grounding
L1
L2
L3
N
1
21 2
S1
Indoor
unit
S2
S3
S1
S2
S3
S1
S2
S3
Unit
power
supply
Indoor/outdoor
unit connection
cable
Indoor
unit
Outdoor
unit
Remote
controller
Grounding
1
21
21
2
S1
S2
S3
S1
S2
S3
S1
S2
S3
S1
S2
S3
Indoor/outdoor
connection cable
Indoor
unit
Unit
power
supply
Indoor
unit
Indoor
unit
Outdoor
unit
Remote
controller
L1
L2
L3
N
Grounding
1:1 system Synchronized twin, triple and quadruple system
Electrical wiring
• Synchronized twin
• Synchronized triple
1
21
2
S1
S2
S3
S1
S2
S3
S1
S2
S3
1
2
S1
S2
S3
1
2
S1
S2
S3
Indoor/outdoor
connection cable
Indoor
unit
Unit
power
supply
Indoor
unit
Indoor
unit
Outdoor
unit
Remote
controller
L1
L2
L3
N
Grounding
Indoor
unit
• Synchronized quadruple
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15
9-2. M-NET WIRING METHOD
(Points to notice)
(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from
making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same
conduit tube.
(2) Terminal block (TB7) for transmission wires should never be connected to 220~240V power supply. If it is connected,
electronic parts on M-NET p.c. board may be burn out.
(3) Use 2-core x 1.25mm2shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or
received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this
because this may cause a malfunction.
It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.
(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to
the influence of electromagnetic noise.
“Ed” error will appear on the LED display of outdoor unit.
“0403” error will appear on the central-control remote controller.
If there are more than two grounding spots on the shield wire, noise may enter into the shield wire because the ground
wire and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among
grounding spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and
shield wire do not form one circuit.
To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the
installation manual.
Group
remote
controller
Refrigerant
address 00
M-NET
address 01
A-control
remote
controller
A-control
remote
controller
A-control
remote
controller
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 00
M-NET
address 03
Power
supply
unit for
transmission
wire
Central
remote
controller
M-NET transmission wire
✕Bad example (Multi spot grounding of shield wire)
Good example 1 (Single spot grounding of shield wire)
Power
supply
appliance M-NET type
outdoor unit
Central
remote
controller
Power
supply
appliance M-NET type
outdoor unit
M-NET type
outdoor unit M-NET type outdoor unit
M-NET transmission wire
M-NET type
outdoor unit M-NET type outdoor unit
Central
remote
controller
Power
supply
appliance M-NET type
outdoor unit
M-NET transmission wire
M-NET type
outdoor unit M-NET type outdoor unit
Good example 2 (Single spot grounding of shield wire)
OC317-1.qxp 04.11.26 9:33 AM Page 15

16
9-2-3. Regulations in address settings
In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above
section. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.
wRefrigerant addresses can be overlapped if they are in the different group.
wIn group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As
“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in
the group for the outdoor unit whose refrigerant address is “00”.
9-2-1. M-NET address setting
In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to Free Combo
system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the
setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as
that of the indoor unit in Free Combo system), and the address number should be consecutively set in a same group.
Address number can be set by using rotary switches
(SW11 for ones digit and SW12 for tens digit), which
is located on the M-NET p.c. board of outdoor unit.
(Factory setting: all addresses are set to “0”.)
9-2-2. Refrigerant address setting
In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote
controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group set-
ting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller circuit board. [Factory
setting: all switches are OFF. (All refrigerant addresses are “00”.)]
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
12
~
50
M-NETAddress No. <Setting example>
Switng
setting
SW11
ones
digit
SW12
tens
digit
OFF
ON
123456123456123456123456123456123456123456123456
123456
123456123456123456123456123456123456123456123456
123456
0
Refrigrant
address
OFF
ON
8
OFF
ON
1
OFF
ON
9
OFF
ON
10
OFF
ON
11
OFF
ON
12
OFF
ON
13
OFF
ON
14
OFF
ON
15
OFF
ON
2
OFF
ON
3
OFF
ON
4
OFF
ON
5
OFF
ON
6
OFF
ON
7
System
controller
A-control
remote
controller
Group A Group B Group C
A-control
remote
controller
TB5
A-control
remote
controller
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 00
M-NET
address 04
Power
supply
unit for
transmission
wire
A-control
remote
controller
A-control
remote
controller
TB5
Group A Group B
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 01
M-NET
address 02
Refrigerant
address 00
M-NET
address 04
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 02
M-NET
address 05
System
controller
Power
supply
unit for
transmission
wire
●M-NET wiring
(1) Use 2-core x 1.25mm2shield wire for electric wires.
(Excluding the case connecting to system controller.)
(2) Connect the wire to the M-NET terminal block.Connect one core of the
transmission wire (non-polar) to A terminal and the other to B. Peel the
shield wire, twist the shield part to a string and connect it to S terminal.
(3) In the system which several outdoor units are being connected, the terminal
(A, B, S) on M-NET terminal block should be individually wired to the other
outdoor unit’s terminal, i.e. A to A, B to B and S to S.In this case, choose one of those outdoor units and drive a screw
to fix an ground wire on the plate as shown on the right figure.
Transmission
wire Shield part
M-NET
terminal
block Ground
wire
ABS
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17
10 REFRIGERANT SYSTEM DIAGRAM
PUHZ-RP8YHA
PUHZ-RP10YHA
Strainer
#50
Strainer
#50 Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
Oil
separator
Strainer
#100
Stop valve
(with service port)
Stop valve
(with service port)
Charge plug
(Low pressure)
Accumulator
Oil-back hole
Strainer#40
Linear expansion valve
Low pressure switch 63L
Compressor
Capillary tube1
Capillary tube2
Replace
filter
High pressure switch 63H
Bypass valve
Charge plug
(High pressure)
Thermistor TH4
(Discharge)
Thermistor TH6
(Outdoor 2-phase pipe)
Thermistor TH7
(Outdoor)
Thermistor TH3
(Outdoor pipe)
Thermistor TH32
(Outdoor pipe)
Heat exchanger
4-way valve
Refrigerant GAS pipe
connection
(RP8:1, RP10:1-1/8)
Refrigerant LIQUID pipe
connection
(RP8:3/8F, RP10:1/2F)
Refrigerant flow in cooling
Refrigerant flow in heating
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18
11 CAPACITY CURVES
-5 0 5 10 15 20 25 30 35 40 46
16
18
20
22
0.6
0.8
1
1.2
1.4
Cooling capacity ratio
Outdoor intake air dry-bulb temperature <D.B. :>
-5 0 5 10 15 20 25 30 35 40 46
16
18
20
22
0.4
0.6
0.8
1.0
1.2
Cooling input ratio
Outdoor intake air dry-bulb temperature <D.B. :>
Cooling capacity
Heating capacity Heating input
Cooling input
Outdoor intake air wet-bulb temperature <W.B. :> Outdoor intake air wet-bulb temperature <W.B. :>
Indoor intake air wet-bulb temperature <W.B. :>
Indoor intake air wet-bulb temperature <W.B. :>
Indoor intake air dry-bulb temperature <D.B. :>
Indoor intake air dry-bulb temperature <D.B. :>
Note : These diagrams show the case where the operation frequency of a compressor is fixed.
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19
12 APPLICABLE EXTENSION PIPE FOR EACH MODEL
12-1. 1:1 SYSTEM
(1) Pipe length
70m
[30m]
SW
SW : When the outdoor unit is located lower than
the indoor unit, set DIP SW8-1 on the outdoor
unit controller board to ON.
RP8
RP10
Liquid
pipe
(mm)
OD
Thick-
ness
OD
Thick-
ness
gas
pipe
(mm)
[19.05
t1.0
20m
[20m]
20m
[20m]
[22.2
t1.0
50m
[30m]
50m
[30m]
[25.4
t1.0
Normal piping
70mw1
[30m]
70m
[30m]
[28.58
t1.0
SW
70m
[30m]
70m
[30m]
[19.05
t1.0
20m
[20m]
20m
[20m]
[22.2
t1.0
50m
[30m]
50m
[30m]
[25.4
t1.0
70m
[30m]
70m
[30m]
[28.58
t1.0
SW
70m
[30m]
Normal piping
70mw1
[30m]
[28.58
t1.0
SW
50m
[20m]
50m
[20m]
[31.75
t1.0
w2
SW
50m
[20m]
w2
50m
[20m]
[25.4
t1.0
50m
[20m]
50m
[20m]
[22.2
t1.0
50m
[20m]
50m
[20m]
Note : The maximum pipe length is 80m in case of new piping.
w1 Be sure to use hard (tempered) one for pipe over [22.2.(Do not use soft (annealed) one.)
w2 When using [31.75 pipe, the outdoor temperature range (dry-bulb temperature) for heating operation is -11 to +21:.
<Table 1> Maximum pipe length (RP8·RP10)
< Marks in the table above >
[9.52
t0.8
[12.7
t0.8
[15.88
t1.0
The maximum pipe length
Charge-less pipe length
: It can be used.
: Cooling capacity is lowered.➝Refer to <Table6>
: Additional refrigerant charge is required when
the pipe length exceeds 20m.➝Refer to <Table7>
(2) Adjusting the amount of refrigerant
Check additional refrigerant charging amount referring to table 7 when the liquid pipe diameter is larger than
the standard size, and table 2 when the pipe of the standard diameter is used.
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
Outdoor unit permitted
pipe length
RP8
RP10 80m or less
At time of shipping
(kg)
10.5
10.5
No additional
charge necessary
The additional charge
amount is obtained by
the following formula.
Main piping:
Liquid line size
[9.52overalllength [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
[12.7overalllength[m]
o0.12 [kg/m]
–=
Additional charge amount
for 70 m RP8 3.6 kg
RP10 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 70m," perform the additional charge using the amount shown
in "Additional charge amount for 70m."
<Table 2>
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20
(3) Capacity correction
Cooling and heating capacity is lowered according to the piping length. Capacity can be obtained by referring
to the following capacity curves.
When the diameter of the gas pipe is smaller than the standard size, cooling capacity is lowered comparing to
the operation using the standard diameter pipe.
The lowered capacity can be obtained by referring to the capacity curves for gas pipe which is one or two size
smaller than standard size.
Corrected pipe length (m) = actual pipe length (m) + number of bends o0.3 (m)
1. Capacity curves 1 <Standard size>
70
75
80
85
90
95
100
5 10152025303540455055606570758085
Corrected pipe length (m)
Capacity ratio [%]
RP8·10
Heating RP8·10
2. Capacity curves 2 <When the gas pipe's diameter is one-size-smaller than the standard
70
75
80
85
90
95
100
510152025303540455055
Corrected pipe length [m]
Capacity ratio [%]
Heating RP8([22.2), RP10([25.4)
Cooling RP8([22.2)
Cooling RP10([25.4)
70
75
80
85
90
95
100
510152025
Corrected pipe length [m]
Cpacity ratio [%]
Cooling RP10([22.2)
Cooling RP8([19.05)
Heating RP8([19.05), RP10([22.2)
3. Capacity curves 3 <When the gas pipe's diameter is two-size-smaller than the standard
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