Mitsubishi Electric CITY MULTI PUMY-P200YKM3 User manual

SERVICE MANUAL
June 2022
OCH791
1. SERVICE REF. ···································2
2. SAFETY PRECAUTION ·······················3
3. OVERVIEW OF UNITS ························ 7
4. SPECIFICATIONS ···························· 11
5. DATA·············································· 12
6. OUTLINES AND DIMENSIONS ··········· 20
7. WIRING DIAGRAM ··························· 21
8. TROUBLESHOOTING ······················· 22
9. DISASSEMBLY PROCEDURE ············ 97
10. SYSTEM CONSTRUCTION ···············104
11. ELECTRICAL WIRING ·····················106
12. REFRIGERANT PIPING TASKS ·········107
13. REMOTE CONTROLLER ··················108
HFC
utilized
R410A
Appendix: Installation manual (Exerpt of English Ver.)
Model
name
indication
PARTS CATALOG (OCB791)
<Outdoor unit>
Model name
PUMY-P200YKM3
PUMY-P200YKM3-ER
PUMY-P200YKM3-ET
Salt proof model
PUMY-P200YKM3-BS
PUMY-P200YKM3-ERBS
PUMY-P200YKM3-ETBS

OCH791 _2
1 SERVICE REF.
PUMY-P200YKM3
PUMY-P200YKM3-ER
PUMY-P200YKM3-ET
PUMY-P200YKM3-BS
PUMY-P200YKM3-ERBS
PUMY-P200YKM3-ETBS

OCH791 _3
2 SAFETY PRECAUTION
2-1. 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 o󰀨 the power-supply breaker.
• 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 o󰀨 the power, exercise great caution
not to touch the live parts.
• When opening or closing the valve below freezing temperatures, refrigerant may spurt out from the gap between the
valve stem and the valve body, resulting in injuries.
Use new refrigerant pipes.
• Avoid using thin pipes.
Make sure that the inside and outside of refrigerant piping is clean and it has no contam-
inants such as sulfur, oxides, dirt, shaving particles, etc., which are hazard to refrigerant
cycle. In addition, use pipes with specied thickness.
• Contamination inside refrigerant piping can cause deterioration of refrigerant oil, etc.
Store the piping indoors, and keep 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
compressor.
The refrigerant oil applied to are and ange connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
• If large amount of mineral oil enters, that can cause deterioration of refrigerant oil, etc.
Charge refrigerant from liquid phase of refrigerant cylinder.
• If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the e󰀩ciency will be
lowered.
Do not use refrigerant other than R410A.
• If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc.
Use a vacuum pump with a reverse ow check valve.
• Vacuum pump oil may ow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc.
Use the following tools specically designed for use with R410A refrigerant.
• The following tools are necessary to use R410A refrigerant.
Tools for R410A
Gauge manifold Flare tool
Charge hose Size adjustment gauge
Gas leak detector Vacuum pump adaptor
Torque wrench Electronic refrigerant charging scale

OCH791 _4
Handle tools with care.
• If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of
compressor.
Do not use a charging cylinder.
• If a charging cylinder is used, the composition of refrigerant will change and the e󰀩ciency will be lowered.
Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact
with a ame, poisonous gases will be released.
Use the specied refrigerant only.
• Never use any refrigerant other than that specied.
• Doing so may cause a burst, an explosion, or re when the unit is being used, serviced, or disposed of.
• Correct refrigerant is specied 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.
Follow the instructions below to prevent abrasive components contained in sandpaper and
cutting tools from entering the refrigerant circuit because those components can cause
failures of the compressor and valves.
• To deburr pipes, use a reamer or other deburring tools, not sandpaper.
• To cut pipes, use a pipe cutter, not a grinder or other tools that use abrasive materials.
• When cutting or deburring pipes, do not allow cutting chips or other foreign matters to enter the pipes.
• If cutting chips or other foreign matters enter pipes, wipe them o󰀨 the inside of the pipes.
Do not pump down the system when a gas leak has been detected.
• The intake of air or other gases causes abnormally high pressure in the refrigeration cycle, which may cause explo-
sion or injury.
2-1-1. Cautions for service
• Perform service after recovering the refrigerant left in unit completely.
• Do not release refrigerant in the air.
• After completing service, charge the cycle with specied amount of refrigerant.
• If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
2-1-2. 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.)
Unit
Electronic weighing scale
2-1-3. Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specications
1 Gauge manifold Only for R410A
Use the existing tting specications. (UNF1/2)
Use high-tension side pressure of 5.3MPa·G or over.
2 Charge hose Only for R410A
Use pressure performance of 5.09MPa·G or over.
3Electronic weighing scale –
4 Gas leak detector Use the detector for R134a, R407C or R410A.
5 Adaptor for reverse ow check Attach on vacuum pump.

OCH791 _5
No. Tool name Specications
6Refrigerant charge base –
7Refrigerant cylinder Only for R410A
Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment –
2-2. 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 performance of the unit.
• Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
• 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.)
• 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.
• If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
• If the unit is damaged during installation or maintenance, be sure to repair it.
• Be sure to check the condition of the unit regularly.
• Be sure to install the unit in a location with good drainage.
2-2-1. Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is the
same as for R22, exclusive tools are necessary so as not to mix with di󰀨erent kind of refrigerant. Furthermore as the
working pressure of R410A is 1.6 times higher than that of R22, their sizes of ared sections and are nuts are di󰀨erent.
■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 [7/256 in] or below.)
Piping diameter and thickness
Nominal dimensions (in) Outside diameter (mm) Thickness (mm)
R410A R22
1/4 6.35 0.8 0.8
3/8 9.52 0.8 0.8
1/2 12.70 0.8 0.8
5/8 15.88 1.0 1.0
3/4 19.05 1.0* 1.0
7/8 22.2 1.0* 1.0
* Use 1/2 H or H pipes.
■Dimensions of are cutting and are 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, are cutting dimension of copper pipe for R410A has been specied
separately from the dimensions for other refrigerants as shown below. The dimension B of are nut for R410A also
has partly been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe aring
dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes. Use torque wrench corresponding to
each dimension.
Dimension A
Dimension B
Flare cutting dimensions
Nominal dimensions (in) Outside diameter (mm) Dimension A (
0
-0.4
) (mm [in])
R410A R22
1/4 6.35 9.1 [11/32-23/64] 9.0
3/8 9.52 13.2 [1/2-33/64] 13.0
1/2 12.70 16.6 [41/64-21/32] 16.2
5/8 15.88 19.7 [49/64-25/32] 19.4
3/4 19.05 – 23.3
Flare nut dimensions
Nominal dimensions (in) Outside diameter (mm) Dimension B (
0
-0.4
) (mm)
R410A R22
1/4 6.35 17.0 17.0
3/8 9.52 22.0 22.0
1/2 12.70 26.0 24.0

OCH791 _6
Nominal dimensions (in) Outside diameter (mm) Dimension B (
0
-0.4
) (mm)
R410A R22
5/8 15.88 29.0 27.0
3/4 19.05 –36.0
■Tools for R410A (The following table shows whether conventional tools can be used or not.)
Tools and materials Use R410A tools Can R22 tools be used ? Can R407C tools be used ?
Gauge manifold Air purge, refrigerant charge
and operation check
Tool exclusive for R410A
Charge hose Tool exclusive for R410A
Gas leak detector Gas leak check Tool for HFC refrigerant
Refrigerant recovery
equipment
Refrigerant recovery Tool exclusive for R410A
Refrigerant cylinder Refrigerant charge Tool exclusive for R410A
Applied oil Apply to ared section Ester oil, ether oil and
alkylbenzene oil (minimum
amount)
Ester oil, ether oil:
Alkylbenzene oil: minimum
amount
Safety charger Prevent compressor
malfunction when charging
refrigerant by spraying liquid
refrigerant
Tool exclusive for R410A
Charge valve Prevent gas from blowing out
when detaching charge hose
Tool exclusive for R410A
Vacuum pump Vacuum drying and air purge Tools for other refrigerants
can be used if equipped with
adopter for reverse ow
check
( Usable if equipped with
adopter for reverse ow)
( Usable if equipped with
adopter for reverse ow)
Flare tool* Flaring work of piping Tools for other refrigerants
can be used by adjusting
aring dimension
( Usable by adjusting
aring dimension)
( Usable by adjusting
aring dimension)
Bender Bend the pipes Tools for other refrigerants
can be used
Pipe cutter* Cut the pipes Tools for other refrigerants
can be used
Welder and nitrogen gas
cylinder
Weld the pipes Tools for other refrigerants
can be used
Refrigerant charging scale Refrigerant charge Tools for other refrigerants
can be used
Vacuum gauge or thermistor
vacuum gauge and vacuum
valve
Check the degree of
vacuum. (Vacuum valve
prevents back ow of oil and
refrigerant to thermistor
vacuum gauge)
Tools for other refrigerants
can be used
Charging cylinder Refrigerant charge Tool exclusive for R410A –
: 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.
* Follow the instructions below to prevent abrasive components contained in sandpaper and cutting tools from entering
the refrigerant circuit because those components can cause failures of the compressor and valves.
• To deburr pipes, use a reamer or other deburring tools, not sandpaper.
• To cut pipes, use a pipe cutter, not a grinder or other tools that use abrasive materials.
• When cutting or deburring pipes, do not allow cutting chips or other foreign matters to enter the pipes.
• If cutting chips or other foreign matters enter pipes, wipe them o󰀨 the inside of the pipes.

OCH791 _7
3 OVERVIEW OF UNITS
3-1. System construction
Wireless remote
controller
M series indoor unit*4, *5
MSZ-SF·VA/VE series
MSZ-EF·VE/VG(K) series
MSZ-FH·VE series
MFZ-KJ·VE series
MFZ-KT·VG series
MSZ-LN·VG(2) series
MSZ-AP·VG(K) series
MSZ-AP·VF series
CONNECTION KIT
PAC-LV11M-J
Model name CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E
Number of branches 2 4 8
Outdoor unit Horsepower 8 HP
Model name P200
Applicable indoor unit Capacity class 10 to 200
Number of units 1 to 12
Total system capacity range 50 to 130% of outdoor unit capacity*1
Connectable indoor unit lineup
Model type Model name 10 15 20 25 32 40 50 63 71 80 100 125 140 200
Cassette
ceiling
2 by 2 PLFY-P·VFM-E1 ●●●●●●
2-way
ow PLFY-P·VLMD-E ●●●●●● ●●●
4-way
ow
PLFY-P·VBM-E ●●●●●● ●●●
PLFY-P·VEM-E ●●●●●● ●●●
PLFY-M·VEM6-E ●●●●●●●●●●
PLFY-M·VEM-E ●●●●●● ●●●
1-way ow PMFY-P·VBM-E ●●●●
Ceiling concealed PEFY-P·VMS1(L)-E ●●●●●●●
PEFY-P·VMA(L)-E/E2 ●●●●●●●●●●●
PEFY-P·VMA(L)-E3 ●●●●●●●●●●●
PEFY-P·VMHS-E ●●●●●●●●●
PEFY-P·VMR-E-L/R ●●●
PEFY-M·VMA(L)-A1 ●●●●●●●●●●●
Wall mounted PKFY-P·VLM-E ●●●●●●●
PKFY-P·VKM-E ● ●
Ceiling suspended PCFY-P·VKM-E ● ● ● ●
Floor
standing
Exposed PFFY-P·VLEM-E ●●●●●●
PFFY-P·VKM-E2 ●●●●
Concealed
PFFY-P·VLRM(M)-E ●●●●●●
PFFY-P·VCM-E ●●●●●●
Ceiling
concealed
Fresh air*2 PEFY-P·VMHS-E-F ●
Lossnay GUF·RD(H)4*3 ● ●
Remote controller Name M-NET remote controller MA remote controller
Model name PAR-F27MEA-E, PAR-U02MEDA PAR-4xMAA, PAR-3xMAA ("x" represents 0 or later)
Functions • A handy remote controller for use in conjunction
with the Melans centralized management system.
• Address setting is required.
• Address setting is not required.
*1. When the indoor unit of Fresh Air type is connected with the outdoor unit, the maximum connectable total indoor unit
capacity is 110%.
*2. PUMY is connectable to Fresh Air type indoor unit.
It is possible to connect 1 Fresh Air type indoor unit to 1 outdoor unit. (1:1 system)
Operating temperature range (outdoor temperature) for fresh air type indoor units di󰀨er from other indoor units.
Refer to "3-4-3. Operating temperature range".
*3. Do not connect Lossnay remote controller(s). (PZ-61DR-E, PZ-60DR-E, PZ-52SF-E, PZ-43SMF-E)
*4. When connecting the CONNECTION KIT (PAC-LV11M-J) and an M-series indoor unit, refer to the installation manual
for the CONNECTION KIT.
*5. The CONNECTION KIT cannot be connected to the indoor unit whose model name is 60 or larger and LN 18.

OCH791 _8
3-2. System construction (Branch box system)
Outdoor unit Horsepower 8 HP
Model name P200
Applicable indoor unit Capacity class 15 to 100
Number of units 2 to 8
Total system
capacity range
50 to 130% of outdoor unit capacity
11.2 to 29.1 kW
Branch box that can be connected Number of units 1 to 2*
* The maximum total capacity of the units that can be connected to each branch box is 20.2 kW.
Connectable indoor unit lineup (Heat pump inverter type)
Model type Model name 15 18 20 22 25 35 42 50 60 71 80 100
Wall mounted Deluxe MSZ-FH·VE ● ● ●
MSZ-LN·VG(2) ● ● ●
Standard MSZ-GF·VE ● ●
MSZ-SF·VE ●●●●
MSZ-AP·VG-E1/E6 ●●●●
MSZ-AP·VG(K)-E2/E3/E7
●●●●
MSZ-EF·VE ● ●●●●●
MSZ-EF·VG-E1/E2 ● ●●●●●
MSZ-EF·VGK-E1 ● ●●●●●
Compact MSZ-SF·VA ● ●
MSZ-AP·VF ● ●
MSZ-AP·VG-E3 ● ●
MSZ-AP·VGK-E2 ● ●
Ceiling concealed Low static pressure SEZ-KD·VA(L) ●● ●●●
SEZ-M·DA(L) ●● ●●●
SEZ-M·DA(L)2 ● ● ● ●
Middle static
pressure
PEAD-RP·JA(L)Q(.UK)
● ● ● ●
PEAD-M·JA(L) ● ● ● ●
PEAD-M·JA(L)2 ● ● ● ●
4-way ceiling
cassette
2 by 2 type SLZ-KF·VA2 ● ● ●
SLZ-M·FA ● ● ● ●
SLZ-M·FA2 ● ● ● ●
Standard PLA-RP·EA(.UK) ● ● ● ● ●
PLA-M·EA ● ● ● ● ●
PLA-M·EA2 ● ● ● ● ●
Ceiling suspended PCA-RP·KAQ ● ● ● ● ●
PCA-M·KA ● ● ● ● ●
PCA-M·KA2 ● ● ● ● ●
Floor standing MFZ-KJ·VE2 ● ● ●
MFZ-KT·VG(-E2) ● ● ●
1-way ceiling cassette MLZ-KA·VA ● ● ●
MLZ-KP·VF ● ● ●
Note:
• The lineup of a connectable indoor unit depends on a district/areas/country.
Branch box PAC-MK53/54BC
PAC-MK53BCB
PAC-MK33/34BC
PAC-MK33BCB
Number of branches
(Indoor unit that can be connected) 5 (MAX. 5 units) 3 (MAX. 3 units)
Note:
• A maximum of 2 branch boxes can be connected to 1 outdoor unit.
2-branch pipe (joint), optional parts
Using 1 branch box Not required
Using 2 branch boxes Required
Connection method: are (MSDD-50AR-E)
Connection method: brazing (MSDD-50BR-E)
Note: Select the appropriate model based on the connection method.
Option Optional accessories of indoor units and outdoor units are available.

OCH791 _9
3-3. System construction (Mixed system)
Branch box PAC-MK5*BC PAC-MK3*BC
Number of branches 5 (MAX. 5 units) 3 (MAX. 3 units)
Outdoor unit Model name P200
Applicable
indoor unit
Capacity class CITY MULTI indoor unit 10 to 200
Via branch box 15 to 100
Number of units Via branch box CITY MULTI indoor
1 branch box*1 5 5
2 branch boxes*1 8 3
Total system capacity range 11.2 to 29.1 kW
50 to 130% of outdoor unit capacity
CITY MULTI indoor units*2
M series
S series
P series
indoor units*2
MA
remote
controller
MA
remote
controller
CONNECTION KIT
PAC-LV11M-J
M series indoor unit
M-NET
remote
controller
Model name CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E
Number of branches 2 4 8
*1. The maximum total capacity of the units that can be connected to each branch box is 20.2 kW.
*2. Refer to “3-1. System construction” or “3-2. System construction (Branch box system)”, for more detail.
3-4. System Specications
3-4-1. Outdoor Unit
Outdoor unit Model name P200
Capacity Cooling (kW) 22.4
Heating (kW) 25.0
Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Cooling Indoor: D.B. 27°C/W.B. 19°C
Outdoor: D.B. 35°C
Heating Indoor: D.B. 20°C
Outdoor: D.B. 7°C/W.B. 6°C
3-4-2. Method for identifying MULTI-S model
■Outdoor unit <When using model 200>
PU M Y ─P200 Y K M ─ BS
Outdoor
unit
Refrigerant R410A
MULTI-S
Frequency conversion
controller
Indicates equivalent to
Cooling capacity(kcal/ h)
Power supply
Y: 3-phase
380-400-415 V, 50 Hz
Outdoor unit model type
M-NET control
Sub number
Salt
proof type
3

OCH791 _10
3-4-3. Operating temperature range
Cooling Heating
Indoor intake air temperature W.B. 15 to 24°C D.B. 15 to 27°C
Outdoor intake air temperature D.B. −5 to 52°C*1 W.B. −20 to 15°C
D.B.: Dry Bulb Temperature
W.B.: Wet Bulb Temperature
*1. 10 to 52°C D.B.:When connecting PKFY-P10/15/20/25/32VLM, PFFY-P20/25/32VKM, PFFY-P20/25/32VCM,
PFFY-P20/25/32VLEM, PFFY-P20/25/32VLRM(M), and M series, S series, and P series type indoor
unit.
■When connecting fresh air type indoor unit
PEFY-P·VMHS-E-F
Cooling Heating
Indoor and outdoor intake air temperature D.B. 17 to 43°C*2
W.B. 15.5 to 35°C D.B. -10 to 20°C*3
*2. Thermo-OFF (FAN-mode) automatically starts if the outdoor temp. is lower than 17°C D.B.
*3. Thermo-OFF (FAN-mode) automatically starts if the outdoor temp. is higher than 21°C D.B.