Mitsubishi Electric PU-P71VHA User manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
CONTENTS
1. REFERENCE MANUAL··································2
2. SAFETY PRECAUTION··································3
3. FEATURES ·····················································6
4. SPECIFICATIONS···········································7
5. DATA·······························································9
6. OUTLINES AND DIMENSIONS····················14
7. WIRING DIAGRAM·······································16
8. WIRING SPECIFICATIONS··························18
9. REFRIGERANT SYSTEM DIAGRAM ··············23
10. TROUBLESHOOTING ··································24
11. FUNCTION SETTING····································60
12. DISASSEMBLY PROCEDURE ·····················66
13. PARTS LIST··················································75
14. RoHS PARTS LIST ·······································81
No.OC379
REVISED EDITION-B
R410A
July 2006
Outdoor unit
[model names]
PU-P71VHA
PU-P71YHA
PU-P100VHA
PU-P100YHA
PU-P125YHA
PU-P140YHA
PUH-P71VHA
PUH-P71YHA
PUH-P100VHA
PUH-P100YHA
PUH-P125YHA
PUH-P140YHA
[Service Ref.]
PU-P71VHA.UK
PU-P71YHA.UK
PU-P100VHA.UK
PU-P100YHA.UK
PU-P125YHA.UK
PU-P140YHA.UK
PUH-P71VHA.UK
PUH-P71YHA.UK
PUH-P100VHA.UK
PUH-P100YHA.UK
PUH-P125YHA.UK
PUH-P140YHA.UK
PU-P71VHA.UK PUH-P71VHA.UK
PU-P71YHA.UK PUH-P71YHA.UK
PU-P100VHA.UK PUH-P100VHA.UK
PU-P100YHA.UK PUH-P100YHA.UK
Note:
•This manual describes only
service data of the outdoor
units.
•RoHS compliant products
have <G> mark on the spec
name plate.
•For servicing of RoHS com-
pliant products, refer to the
RoHS Parts List.
Revision:
• RoHS PARTS LIST is added.
•Some descriptions have
been modified.
•Please void OC379
REVISED EDITION-A.
OC379B-1.qxp 06.7.12 3:10 PM Page 1

2
1REFERENCE MANUAL
Model name Service Ref. Service
Manual No.
PLA-RP35/50/60/71AA
PLA-RP100/125/140AA2
PLA-RP35/50/60/71AA.UK OC335
OC357
PLA-RP100/125/140AA2.UK
PCA-RP50/60/71GA PCA-RP50/60/71GA OC328
PCA-RP100/125/140GA PCA-RP100/125/140GA
PKA-RP35/50GAL PKA-RP35/50GAL OC330
PKA-RP60/71/100FAL PKA-RP60/71/100FAL OC331
PEAD-RP60/71/100GA PEAD-RP60/71/100GA.UK HWE05060
PEAD-RP50/60/71/125/140EA
PEAD-RP35/100EA2 PEAD-RP50/60/71/125/140EA.UK PEAD-RP35/100EA2.UK HWE05210
1-2.TECHNICAL DATA BOOK
Manual No. OCS07
1-1. INDOOR UNIT’S SERVICE MANUAL
Service Ref.
Page IncorrectRevise point Correct
79
FUNCTIONAL PARTS
No.30
CONTROLLER CIRCUIT
BOARD
S70 FY2 315S70 FY0 315
PUH-P125YHA.UK
PUH-P140YHA.UK
PU-P125YHA.UK
PU-P140YHA.UK
Revision :
"13. PARTS LIST " have been modified on page 79.
OC379B-1.qxp 06.7.12 3:10 PM Page 2

3
2SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
2-1. 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.
· 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.
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.
[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.)
OC379B-1.qxp 06.7.12 3:10 PM Page 3

4
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
OC379B-1.qxp 06.7.12 3:10 PM Page 4

5
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”
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
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 RP100,
125 and 140
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
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 Accumlator 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.
PU-P71VHA.UK PUH-P71VHA.UK
PU-P71YHA.UK PUH-P71YHA.UK
PU-P100VHA.UK PUH-P100VHA.UK
PU-P100YHA.UK PUH-P100YHA.UK
PU-P125YHA.UK
PU-P140YHA.UK
PUH-P125YHA.UK
PUH-P140YHA.UK
OC379B-1.qxp 06.7.12 3:10 PM Page 6

7
4SPECIFICATIONS
A
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
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
Mode
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUH-P71VHA/YHA.UK PUH-P100VHA/YHA.UK
Cooling
12.03/4.29 25.5
NN33VAAMT/ NN33YCAMT
2.2
(V) Internal thermostat
HP switch
Discharge thermo
25
0.070
55(1940)
49
50
93(205)
3.6(7.9)
30.5
NN40VAAMT/ NN40YCAMT
2.7
(Y) Thermal relay
HP switch
Discharge thermo
25
0.110
65(2290)
50
52
94(207)
4.4(9.7)
Propeller fan o1
943(37-1/8)
1.30(MEL56)
Max. 50m
Munsell 5Y 7/1
Linear Expansion Valve
Hermetic
Line start
Plate fin coil
Reverse cycle
950(37-3/8)
330+30(13+1-3/16)
R410A
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 50m
Heating
11.98/4.28
Cooling
15.07/5.39
Heating
14.48/5.18
Single, 50Hz, 230V/ 3Phase, 50Hz, 400V(4wires)
OUTDOOR UNIT
REFRIGERANT PIPING
A
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
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
Mode
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUH-P140YHA.UKPUH-P125YHA.UK
Cooling
6.79
Munsell 5Y 7/1
Linear Expansion Valve
Hermetic
Line start
Discharge thermo, HP switch
Thermal relay
Plate fin coil
Propeller fan o2
0.070+0.070
100(3,530)
Reverse cycle
950(37-3/8)
330+30(13+1-3/16)
1,350(53-1/8)
131(289)
R410A
5.0(11.0)
2.10(MEL56)
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 50m
Max. 50m
Heating
6.57
Cooling
8.55 18.7
BN65YEGMT
4.6
25
51
53
15.1
BN52YEGMT
3.7
25
50
52
Heating
8.45
3Phase, 50Hz, 400V
OUTDOOR UNIT
REFRIGERANT PIPING
OC379B-1.qxp 06.7.12 3:10 PM Page 7

8
A
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
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
Mode
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PU-P71VHA/YHA.UK PU-P100VHA/YHA.UK
Cooling
12.03/4.29
25.5
NN33VAAMT/ NN33YCAMT
2.2
(V) Internal thermostat
HP switch
Discharge thermo
25
0.070
55(1940)
49
–
93(205)
3.6(7.9)
Propeller fan o1
943(37-1/8)
1.30(MEL56)
Max. 50m
Munsell 5Y 7/1
Linear Expansion Valve
Hermetic
Line start
Plate fin coil
–
950(37-3/8)
330+30(13+1-3/16)
R410A
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 50m
Cooling
15.07/5.18
30.5
NN40VAAMT/ NN40YCAMT
2.7
(Y) Thermal relay
HP switch
Discharge thermo
25
0.110
65(2290)
50
–
94(207)
4.4(9.7)
Single, 50Hz, 230V / 3Phase, 50Hz, 400V(4wires)
OUTDOOR UNIT
REFRIGERANT PIPING
A
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
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
Mode
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PU-P140YHA.UKPU-P125YHA.UK
Cooling
6.79
15.1
BN52YEGMT
3.7
25
50
–
Munsell 5Y 7/1
Linear Expansion Valve
Hermetic
Line start
Discharge thermo, HP switch
Thermal relay
Plate fin coil
Propeller fan o2
0.070+0.070
100(3,530)
–
950(37-3/8)
330+30(13+1-3/16)
1,350(53-1/8)
131(289)
R410A
5.0(11.0)
2.10(MEL56)
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 50m
Max. 50m
Cooling
8.55
18.7
BN65YEGMT
4.6
25
51
–
3Phase, 50Hz, 400V
OUTDOOR UNIT
REFRIGERANT PIPING
OC379B-1.qxp 06.7.12 3:10 PM Page 8

9
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A : kg)
5-2. COMPRESSOR TECHNICAL DATA
Piping length (one way)
10m 20m 30m 40m 50m Factory
charged
3.4
4.2
4.8
3.5
4.3
4.9
3.6
4.4
5.0
4.2
5.0
5.6
4.8
5.6
6.2
3.6
4.4
5.0
Service Ref.
PUH-P71VHA/YHA.UK
PU-P71VHA/YHA.UK
PUH-P100VHA/YHA.UK
PU-P100VHA/YHA.UK
PUH-P125/140YHA.UK
PU-P125/140YHA.UK
U-V
(R-C)
U-W
(S-C)
W-V
Unit
Compressor model
Winding
Resistance
( ")
NN33YCAMT
(at 20°C)
4.64
4.64
4.64
0.63
1.55
–
3.32
3.32
3.32
NN33VAAMT
0.68
1.80
–
PUH-P71VHA.UK
PU-P71VHA.UK PUH-P71YHA.UK PU-P71YHA.UK
NN40YCAMT
NN40VAAMT
PUH-P100VHA.UK
PU-P100VHA.UK PUH-P100YHA.UK PU-P100YHA.UK
U-V
U-W
W-V
Unit
Compressor model
Winding
Resistance
( ")
(at 20°C)
2.149
2.149
2.149
1.794
1.794
1.794
BN65YEGMT
BN52YEGMT
PUH-P125YHA.UK
PU-P125YHA.UK PUH-P140YHA.UK PU-P140YHA.UK
PRE-CHARGED REFRIGERANT IS
SUPPLIED FOR PIPING LENGTH AT
SHIPMENT.
OC379B-1.qxp 06.7.12 3:10 PM Page 9

10
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
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
PUH-P100VHA.UK
PUH-P100YHA.UK
PU-P100VHA.UK
PU-P100YHA.UK
COOLING
MODE
HEATING
50
SPL(dB)
52
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
PUH-P125YHA.UK
PU-P125YHA.UK
COOLING
MODE
HEATING
50
SPL(dB)
52
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
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
PUH-P71VHA.UK
PUH-P71YHA.UK
PU-P71VHA.UK
PU-P71YHA.UK
COOLING
MODE
HEATING
49
SPL(dB)
51
LINE
OC379B-1.qxp 06.7.12 3:10 PM Page 10