Mitsubishi Electric Mr.Slim PUHZ-RP250YHA2 User manual

SERVICE MANUAL
No.OCH428
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
November 2007
Outdoor unit
[model names]
PUHZ-RP200YHA2
PUHZ-RP250YHA2
[Service Ref.]
PUHZ-RP200YHA2
PUHZ-RP250YHA2
PUHZ-RP200YHA2
PUHZ-RP250YHA2
Note:
•This manual describes only
service data of the outdoor
units.
•RoHS compliant products
have <G> mark on the
spec name plate.
CONTENTS
1. REFERENCE MANUAL ································ 2
2. SAFETY PRECAUTION ································ 3
3. FEATURES···················································· 7
4. SPECIFICATIONS ········································· 8
5. DATA······························································ 9
6. OUTLINES AND DIMENSIONS ·················· 12
7. WIRING DIAGRAM ····································· 13
8. WIRING SPECIFICATIONS························· 14
9.
REFRIGERANT SYSTEM DIAGRAM ············ 19
10. TROUBLESHOOTING································· 21
11. FUNCTION SETTING ·································· 73
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ········· 80
13. EASY MAINTENANCE FUNCTION··············90
14. DISASSEMBLY PROCEDURE···················· 93
PARTS CATALOG (OCB428)

2
1REFERENCE MANUAL
Model name Service Ref. Service
Manual No.
PLA-RP35/50/60/71/100/125/140BA PLA-RP35/50/60/71/100/125/140BA(1).UK OCH412
OCB412
PCA-RP71/125HA OC329 PCA-RP71/125HA
PCA-RP50/60/71/100/125/140GA PCA-RP50/60/71/100/125/140GA OC328
PCA-RP50GA2 PCA-RP50GA2
PKA-RP35/50GAL PKA-RP35/50GAL OC330
PKA-RP60/71/100FAL PKA-RP60/71/100FAL
PKA-RP50FAL2 PKA-RP50FAL2 OC331
PEAD-RP60/71/100GA PEAD-RP60/71/100GA.UK HWE05060
PEA-RP200/250/400/500GA PEA-RP200/250/400/500GA.TH-AF
PEA-RP200/250GA.TH-AFMF HWE0708A
PEAD-RP50/60/71/125/140EA
PEAD-RP35/100EA2
PEAD-RP50/60/71/125/140EA.UK
PEAD-RP35/100EA2.UK HWE05210
INDOOR UNIT’S SERVICE MANUAL

3
2SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must be disconnected.
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 perform replacement operation before test run.
· 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 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.
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 enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil etc.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

4
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
Gauge manifold ·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
Electronic scale
Gas leak detector ·Use the detector for R134a, R407C or R410A.
Adaptor for reverse flow check ·Attach on vacuum pump.
Refrigerant charge base
Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)
·Cylinder with syphon
Refrigerant recovery equipment
[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 syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

5
2-3. Precautions when reusing existing R22 refrigerant pipes
(1) Flowchart
Connecting a new air conditioner to existing R22 refrigerant pipes
Flare the pipe for the use with R410A refrigerant.
Use the flare nut attached to indoor and outdoor unit of the new air conditioner only.
When reusing existing R22 refrigerant pipes of which gas pipe is :28.58mm and, 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.
When reusing standard-size existing R22 refrigerant pipes.
The pipes can be reused with pipe length restriction described on TECHNICAL DATA BOOK.
Measure the existing pipe thickness and check
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 recovery device to recover the refrigerant.
Check the oil condition when recovering refrigerant.
Oil is clean. (Clear to brownish color) Oil is dirty. (Black color)
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
In case that existing pipes were
used for gas or oil heat pump
system, be sure to clean the pipes.
·When performing replacement operation, make sure that DIP SW8-2 on outdoor unit controller board is
set to ON.
+Chemical compounds containing chlorine left in existing pipes are recovered by replace filter.
LThe air conditioner automatically performs cooling operation through replace filter for about 2 hours.
When the compressor bearings
are seized, winding is damaged
or the compressor breaks down,
iron particles or oil deterioration will
blacken the oil.

6
(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.
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 0.7mm or below.)
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 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 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.
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
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 (inch)
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
24.0
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions(inch)
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
36.0
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions(inch)
Flare nut dimensions
Outside
diameter
Dimension B
(mm)
R410A R22
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Safety charger
Charge valve
Vacuum pump
Flare tool
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermis-
tor vacuum gauge and
vacuum valve
Charging cylinder
Air purge, refrigerant charge and
operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Apply to flared section
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Flaring work of piping
Bend the pipes
Cut the pipes
Weld the pipes
Refrigerant charge
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
gerant to thermistor vacuum gauge)
Refrigerant charge
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil, ether 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, ether 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

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. 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-RP200YHA2
PUHZ-RP250YHA2
Indoor unit
Outdoor unit
PUHZ-RP·YHA2
200 250
PEA-RP200, 250GA
Indoor unit
Outdoor unit
PUHZ-RP·YHA2
200 250
PEAD-RP100EA2 2
PEAD-RP125EA 2
PEAD-RP100GA 2
PKA-RP100FAL 2
PCA-RP100GA 2
PCA-RP125GA 2
Indoor unit
Outdoor unit
PUHZ-RP·YHA2
200 250
PEAD-RP60EA 3
PEAD-RP71EA 3
PEAD-RP60GA 3
PEAD-RP71GA 3
PKA-RP60FAL 3
PKA-RP71FAL 3
PCA-RP60GA 3
PCA-RP71GA 3
Indoor unit
Outdoor unit
PUHZ-RP·YHA2
200 250
PEAD-RP50EA 4
PEAD-RP60EA 4
PEAD-RP60GA 4
PKA-RP50GAL 4
PKA-RP50FAL2 4
PKA-RP60FAL 4
PCA-RP50GA(2) 4
PCA-RP60GA 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
Indoor unit
Outdoor unit
PUHZ-RP·YHA2
200 2 250 2
PEA-RP400, 500GA
PLA-RP50BA 4
PLA-RP60BA 4
PLA-RP100BA 2
PLA-RP125BA2
PLA-RP60BA 3
PLA-RP71BA 3
PCA-RP125HA 2
PCA-RP71HA 3
3-1. COMBINATION OF INDOOR AND OUT DOOR UNITS
3-1-1. 1:1 SYSTEM, 1:2 SYSTEM
3-1-2. SYNCHRONIZED TWIN, TRIPLE AND QUADRUPLE SYSTEM
(1) Synchronized twin (50:50) (2) Synchronized triple (33:33:33) (3)
Synchronized quadruple (25:25:25:25)
3-1-3. MULTI DISTRIBUTION PIPE (OPTION)
3-2. FEATURES

8
4 SPECIFICATIONS
A
A
kW
W
kW
*
/min(L/s )
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) %No.
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. PUHZ-RP250YHA2PUHZ-RP200YHA2
Cooling
7.70
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
ANB52FFJMT
Inverter
—
Plate fin coil
Propeller fan %2
0.150 + 0.150
130(2170)
Reverse cycle
950(37-3/8)
330 + 30(13+1-3/16)
1,350(53-1/8)
R410A
Flared
Flared & Brazing
Max. 30m
Max. 120m
Heating
8.90
Cooling
9.50
21
5.5
Heating
11.1
HP switch
Comp. Shell thermo HP switch, LP switch Discharge thermo
3 phase 50Hz, 400V
OUTDOOR UNIT
REFRIGERANT PIPING
4.7
19
58
59
135(297)
6.5(14.3)
2.30(FV50S)
9.52(3/8)
25.4(1)
58
59
136(299)
7.1(15.7)
1.60(FV50S)
12.7(1/2)
25.4(1)

9
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 bar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-RP200YHA2
PUHZ-RP250YHA2
COOLING
MODE
HEATING
58
SPL(dB)
59
LINE
5DATA
5-2. COMPRESSOR TECHNICAL DATA
U-V
U-W
W-V
Unit
Compressor model
Winding
Resistance
()
DWÛ&
ANB52FFJMT
0.30
0.30
0.30
PUHZ-RP200, 250YHA2
5-3. NOISE CRITERION CURVES
1.5m
1m
MICROPHONE
UNIT
GROUND
5-1. 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 71-120 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
RP200
RP250
120m or less
Initial charge
(kg)
6.5
7.1
No additional
charge necessary
The additional charge
amount is obtained by
the following formula.
Main piping:
Liquid line size
:9.52 overall length [m]
%
0.09 [kg/m]
Branch piping: Liquid
line size
:9.52 overall length [m]
%0.06 [kg/m]
Branch piping: Liquid
line size
:6.35 overall length [m]
%0.02 [kg/m]
3.6 (kg)
Amount of additional
charge [kg]
Main piping:
Liquid line size
:12.7 over all length [m]
%0.12 [kg/m]
=
Additional charge amount
for 70 m
RP200 3.6 kg
RP250 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."

10
Parts name
Outdoor unit
250V 6.3A
ANB52FFJMT
Scroll type 6P
HAM-BD35
(0~480 Pulse)
UKV-32D
(0~480 Pulse)
2.7mH 25A
ACB-1UB24
OFF 4.14±0.1MPa / ON 3.14±0.15MPa
—
—
DC12V
Û&NÛ&NÛ&NÛ&NÛ&NÛ&N
Û&NÛ&NÛ&NÛ&NÛ&NÛ&N
Û&NÛ&NÛ&NÛ&NÛ&NÛ&N
Û&NÛ&NÛ&NÛ&NÛ&NÛ&NÛ&NÛ&NÛ&N
8P 150W %2
SIC-81FW-D8187
5P
(L1, L2, L3, N, )
OFF 3.60 + 0.2MPa
ON 2.80 ± 0.15MPa
OFF -0.03 ± 0.03MPa
ON 0.05 ± 0.04MPa
PUHZ-RP200YHA2
FUSE
(F 3,4)
250V 15A
FUSE
(FUSE1,2)
4-way Valve Coil
21S4
Linear Expansion
Valve
Reactor
(DCL)
High pressure switch
(63H1)
Compressor
(MC)
High Pressure
Switch
(63H, 63H2)
Low Pressure
Switch
(63L)
Fan Motor
(MF1)(MF2)
Thermistor
(Discharge)
(TH4)
Thermistor
(Outdoor)
(TH7)
7HUPLQDO%ORFN
(Power Supply)
(TB1)
3P
(S1, S2, S3)
7HUPLQDO%ORFN
(Indoor / Outdoor)
(TB2)
2200400V
:
Main Smoothing Capacitor
(CB1, CB2)
Rush Current
Protect Resister
(RS)
Thermistor
(Outdoor Pipe)
(TH3)
Thermistor
(Outdoor2-PhasePipe)
(TH6)
Linear Expansion
Valve Coil
(LEV-A)(LEV-B)
Valve
Bypass Valve
Bypass Valve Coil
(SV)
PUHZ-RP250YHA2
STF0731Z
FDF6A-008-RK
STF AC220~240V
(BG50T388)
FQ AC220~240V
5-4. ELECTRICAL PARTS SPECIFICATIONS