Mitsubishi Electric PUMY-P60NKMU1 Operating manual

PARTS CATALOG (OCB613)
CONTENTS
1. SAFETY PRECAUTION .....................................2
2. OVERVIEW OF UNITS.......................................5
3. SPECIFICATIONS ............................................10
4. DATA.................................................................11
5. OUTLINES AND DIMENSIONS .......................24
6. WIRING DIAGRAM...........................................25
7. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION....... 26
8. TROUBLESHOOTING......................................36
9. ELECTRICAL WIRING................................... 111
10. REFRIGERANT PIPING TASKS....................116
11. DISASSEMBLY PROCEDURE.......................120
No. OCH613
REVISED EDITION-B
HFC
utilized
R410A
February 2018
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Note:
• This service manual describes
technical data of the outdoor
units only.
[Service Ref.]
PUMY-P60NKMU1
PUMY-P60NKMU1-BS
<Outdoor unit>
[Model name]
PUMY-P60NKMU1
Salt proof model
PUMY-P60NKMU1-BS
TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT
Model name
indication
Revision:
• Corrected some descrip-
tions in "4-2. CORRECTION
BY TEMPERATURE" in
REVISED EDITION-B.
• Some other descriptions
have been also modified.
OCH613 REVISED EDITION-B
is void.

2
Cautions for units utilizing refrigerant R410A
1-1. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Store the piping indoors, and keep both ends of
the piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
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.
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.
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.
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.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Use the specified refrigerant only.
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.
1 SAFETY PRECAUTION
OCH613B

3
Electronic weighing scale
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
[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) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
[2] Additional refrigerant charge
When charging directly from cylinder
(1) Check that cylinder for R410A on the market is a syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the
performance 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.
1-2. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 768.7 PSI [5.3 MPa.G] or over.
2Charge hose · Only for R410A
· Use pressure performance of 738.2 PSI [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 —
OCH613B

4
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.
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 7/256 in [0.7 mm] 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 its working pressure is higher than that of other refrigerants.
Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A has been specified sepa-
rately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has 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.
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
1/32 [0.8]
1/32 [0.8]
1/32 [0.8]
5/128 [1.0]
—
1/32 [0.8]
1/32 [0.8]
1/32 [0.8]
5/128 [1.0]
5/128 [1.0]
Nominal
dimensions
(in)
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness : in [mm]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
11/32-23/64 [ 9.1]
1/2-33/64 [13.2]
41/64-21/32 [16.6]
49/64-25/32 [19.7]
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions (in)
Flare cutting dimensions
Outside
diameter (mm) Dimension A ( )
+0
-0.4
Unit : in [mm]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
43/64 [17.0]
7/8 [22.0]
1-3/64 [26.0]
1-9/64 [29.0]
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions (in)
Flare nut dimensions Outside
diameter (mm)
Dimension B
Unit: in [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
OCH613B

5
2OVERVIEW OF UNITS
2-1. Auxiliary HEATING ON/OFF CONTROL SET-UP
(1) Auxiliary heating operation controls another heat source that depends on the main system's operations,
which means the interlock operation shown in "b)" will be possible.
a)
b) Different Indoor unit applications that can be applied:
(2) Outdoor unit DIPSW5-4 for auxiliary heating control:
Set DIPSW5-4 when power is turned off at unit.
OFF: Disable auxiliary Heating Function (Initial setting)
ON : Enable auxiliary Heating Function
Indoor unit must be R410A UL model for this function to operate.
(3) Determine required indoor fans speed during defrost mode:
To set the fan speed, see the chapter referring to heater control in the indoor unit’s Technical & Service Manual.
OCH613B

6
When the set temperature ranges overlap, the previously set pattern (1,2 or 3) has a priority.
The stage 1 has the highest priority, 2 the second and then 3.
b) Based on above chart listed the sequence of operation on "On ambient decrease"
Stage 1 :(TH7 = > 50°F [10
: ]) : the outdoor unit runs in HP mode.
Stage 2 :(TH7 = 50 to í13°F [10
to í25 : ]) : the outdoor unit runs in HP mode with auxiliary heating.
Stage 3 :(TH7 = < í13°F >í25
: ]) : Auxiliary heating only (Outdoor unit is OFF).
c) Based on above chart listed the sequence of operation on "On ambient increase"
Stage 3 :(TH7 = < 32°F [0
: ]) : Auxiliary heating only (Outdoor unit is OFF).
Stage 2 :(TH7 = > 32 to 68°F [0 to 20
: ]) : Auxiliary heating with outdoor unit in HP mode.
Stage 1 :(TH7 = > 68°F [20
: ]) : Outdoor unit in HP mode only.
(4) Determine fan airflow setting during indoor thermo-OFF conditions:
a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options.
b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller".
Fan speed
setting Fan speed setting
OFF ON
SW1-7 SW1-8
OFF OFF Very low
ON OFF Low
OFF ON Setting on
remote
controller
ON
ON
Stopped
Auxiliary heating
signal
Thermo condition
(5) Setting outdoor unit and auxiliary heat switch over temperatures.
When the DIPSW 5-4 is set to "ON", the outdoor unit and the contact output operates as shown below.
a) Outdoor default setting and operations are shown below:
Stage 1
A
mb. decreasing - Outdoor unit HP operation
Amb. increasing - Defrost : Heater contact ON signal
- Other than defrost : Contact OFF
Stage 2
- Outdoor unit HP operation
- Heater contact ON signal
Stage 3
- Outdoor unit OFF (Standby)
- Heater contact ON signal
TH7 = Outdoor temperature
a
í25
-C
[
í13 -F]
b
0
-C
[32-F]
c
10
-C
[50-F]
d
20
-C
[68-F]
Setting on
remote
controller
OCH613B

7
(6) Locally procured wiring
A basic connection method is shown.
(i.e. interlocked operation with the electric heater with the fan speed setting on high)
Recommended circuit
CN24
CN22
X
+
X
Remote control Board Relay circuit Adapter Indoor unit
control board Outdoor unit control board
Electric Heater power source
Electric
Heater
Red 1
White 2
Dip switch
SW5-4 "ON"
Preparations in the field Maximum cable length
is 10 m (32ft)
Red 1
Red 2
YellowGreen
FS1
FS2
FS1
FS2
R
S
R
S
CN24
H2
88H
H1
88H
26H
88H
1-phase power
supply
208V, 230V/60Hz
Control board
FS1, 2 ----- Thermal fuse
H1, H2 ----- Heater
26H--------- Overheat protection
thermostat
88H--------- Electromagnetic contactor
Wiring diagram
For relay X use the specifications given below operation coil
Rated voltage : 12 V DC
Power consumption :0.9W or less
*Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU24HT is 2 meters (6-1/2 ft)
To extend this length, use sheathed 2-core cable.
Control cable type : CVV, CVS, CPEV, or equivalent.
Cable size : 0.5 mm2to 1.25 mm2(AWG22 to AWG16)
Do not extend the cable more than 10 meters (32 ft).
OCH613B

8
2-2. UNIT CONSTRUCTION
Branching pipe
components Branch header (2 branches) Branch header (4 branches) Branch header (8 branches)
CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E
Remote
controller
Name M-NET remote controller MA remote controller
Model number PAR-F27MEA-E
PAR-U01MEDU PAR-21MAA, PAR-30/31/32MAA
Functions
• A handy remote controller for use in
conjunction with the Melans centralized
management system.
• Addresses must be set.
• Addresses setting is not necessary.
Outdoor unit
7HP
PUMY-P60NKMU1
PUMY-P60NKMU1-BS
Applicable
indoor unit
Capacity Type 06 to Type 72
Number of units 1 to 12 unit
Total system wide capacity 50 to 130% of outdoor unit capacity
Model
Capacity
Cassette Ceiling Ceiling
Concealed Wall Mounted Ceiling Suspended Floor standing
Multi-position
air handling unit
4-way flow 1-way flow Exposed Concealed
PLFY-EP PLFY-P PLFY-P PLFY-P PMFY-P PEFY-P PKFY-P PCFY-P PFFY-P PFFY-P PVFY-P
NEMU-E NEMU-E NCMU-E NFMU-E NBMU-E
NMAU NMSU-E NHMU-E
NMHSU-E
NBMU-E NHMU-E NKMU-E
NKMU-E NEMU-E NRMU-E NAMU-E
05 ––– – ––––––– – – – –
06 –––– –– –– – –
08 – – –– –– –
12 ––– ––
15 –– – –
18 – – –– ––
24 –– – –––
27 –––– – ––––– – – – –
30 –– – –––– ––
36 –– – ––––– ––
48 –– – ––––– – – –
54 –––– – ––––– – – –
72 –––– – ––– ––– – – – –
–: Not connectable
: Connectable
OCH613B

9
2-3. UNIT SPECIFICATIONS
(2) Method for identifying MULTI-S model
(1) Outdoor Unit
Outdoor unit
Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Cooling Indoor D.B. 80°F/W.B. 67°F: [D.B. 26.7°C/W.B. 19.4°C]
Outdoor D.B. 95°F/W.B. 75°F: [D.B. 35°C/W.B. 23.9°C]
Heating Indoor D.B. D.B.70°F/W.B.60°F: [D.B. 21.1°C/W.B. 15.6°C]
Outdoor D.B. 47°F/W.B. 43°F: [D.B. 8.3°C/W.B. 6.1°C]
(3) Operating temperature range
Notes: D.B. : Dry Bulb Temperature
W.B. : Wet Bulb Temperature
*150 to 115 °F [10 to 46°C] D.B. : When connecting PKFY-P06NBMU, PKFY-P08NHMU type indoor unit.
*2 5 to 115°F [−15 to 46°C] D.B.: When using an optional air protect guide [PAC-SH95AG-E].
However, this condition does not apply to the indoor units listed in *1.
Service Ref. PUMY-P60NKMU1
PUMY-P60NKMU1-BS
Capacity Cooling (kBTU/h) 60.0
Heating (kBTU/h) 66.0
Compressor (kW) 4.1
PU M Y - P 60 N K M U 1 - BS
Refrigerant
R410A
Indicates equivalent
to Cooling capacity Power supply
N: 208/230 V AC 60 Hz
Outdoor unit
model type
Sub-
number
M-NET
control
Frequency
conversion
controller
Outdoor unit
MULTI-S Salt proof
type
UL model
Cooling Heating
Indoor-side intake air temperature 59 to 75°F [W.B. 15 to 24°C] 59 to 81°F [D.B. 15 to 27°C]
Outdoor-side intake air temperature 23 to 115°F [D.B. −5 to 46°C]*1*2 −13 to 59°F [W.B. −25 to 15°C]
OCH613B

10
3SPECIFICATIONS
Model PUMY-P60NKMU1
PUMY-P60NKMU1-BS
Power source 208/230V AC, 60 Hz
Cooling
(Nominal)
Capacity BTU/h*160,000
Power input kW 4,680
Current input 208V / 230V A 22.8/20.6
EER BTU/h 12.8
Temp. range of
cooling
Indoor temp. W.B. 59 to 75°F [15 to 24°C]
Outdoor temp. D.B. 23 to 115°F [−5 to 46°C] *3*4
Heating
(Nominal)
Capacity BTU/h*266,000
Power input kW 5,450
Current input 208V / 230V A 26.6 / 24.1
COP W/W 3.55
Temp. range of
heating
Indoor temp. D.B. 59 to 81°F [15 to 27°C]
Outdoor temp. W.B. −13 to 59°F [−25 to 15°C]
Breaker size 40A
Max. fuse size 42A
Min. circuit ampacity 36A
Indoor unit
connectable
Total capacity 50 to 130% of outdoor unit capacity
Model/ Quantity Citymulti 06–72/12
Sound pressure level
(measured in anechoic room)
dB <A> 58/59
Refrigerant
piping diameter
Liquid pipe inch (mm) 3/8 (9.52)
Gas pipe inch (mm) 3/4 (19.05)
FAN *2 Type x Quantity Propeller Fan x 2
Air flow rate m³/min 138
L/s 2,300
cfm 4,879
Control, Driving mechanism DC control
Motor output kW 0.2+0.2
External static press. 0
Compressor Type x Quantity Scroll hermetic compressor x 1
Manufacture Mitsubishi Electric Corporation
Starting method Inverter
Capacity control % Cooling: 36 to 100
Heating: 22 to 100
Motor output kW 4.1
Case heater kW 0
Lubricant FV50S (2.3 liter)
External finish Galvanized Steel Sheet
Munsell No. 3Y 7.8/1.1
External dimension HxWxD mm 1,338 × 1,050 × 330(+25)
inch 52-11/16 × 41-11/ 32 × 13 (+1)
Protection devices High pressure protection High pressure Switch, High pressure Sensor
Inverter circuit (COMP./FAN) Overcurrent detection, Overheat detection(Heat sink thermistor)
Compressor Compressor thermistor, Overcurrent detection
Fan motor Overheating, Voltage protection
Refrigerant Type x original charge R410A 5.1kg
Control Electronic expansion valve
Net weight kg (lb) 139 (306)
Heat exchanger Cross Fin and Copper tube
HIC circuit (HIC: Heat Inter-Changer) HIC circuit
Defrosting method Reversed refrigerant circuit
Drawing External BK01V261
Wiring BH78B813
Standard
attachment
Document Installation Manual
Accessory Grounded lead wire x2, conduit plate
Optional parts Joint: CMY-Y62-G-E
Header: CMY-Y64/68-G-E
Remarks Unit converter
kcal/h = kW × 860
BTU/h = kW × 3,412
cfm = m³/min x 35.31
lb = kg/0.4536
Above specification data
is
subject to rounding
variation.
*1 Nominal cooling conditions *2Nominal heating conditions
Indoor :
80.0°F D.B/67.0°F W.B. [26.7°C D.B. /19.4°C W.B.] 70.0°F D.B./60.0°F W.B. [21.1°C D.B./15.6°C W.B.]
Outdoor :
95.0°F D.B./75.0°F W.B.[35.0°C D.B. /23.9°C W.B.] 47.0°F D.B./43.0°F W.B. [8.3°C D.B./6.1°C W.B.]
Pipe length :
25 ft [7.6 m] 25 ft [7.6 m]
Level difference : 0 ft [0 m] 0 ft [0 m]
Note : Due to continuing improvement, above specifications may be subject to change without notice.
*350 to 115°F [10 to 46°C] D.B. :
When connecting PKFY-P06NBMU and PKFY-P08NHMU type indoor unit.
*4
5 to 115°F [−15 to 46°C] D.B.: When using an optional air protect guide [PAC-SH95AG-E].
However, this condition does not apply to the indoor units listed in *3.
OCH613B