York MOC-MOH 07-65 User manual

OUTDOOR UNITS
SAFETY
CAUTION
ELECTRICAL CONNECTIONS GENERAL PRECAUTIONS
CRANKCASE HEATER
Before undertaking any work on the unit, make sure that the power supply has been disconnected.
INSTALLATION & OWNERS
MANUAL GUIDE
MINISPLIT CONDENSING UNIT
Models
MOC-MOH 07- 5
For units fitted with crankcase heater, the heater MUST be on
for a minimum of 6 hours before starting compressor. Failure to
obser e this precaution may result
in damage to the compressor or re ersing al e.
All electrical wiring and connections must comply with local
standards. Power supply cord and interconnection cord used
must not be lighter than Polychloroprene sheated cord
(245 IEC 57 or H05RN-F).
Disconnecting de ice must ha e a contact separation of
at least 3 mm.
Check that the power supply a ailable agrees with nameplate
oltage.
Use adequate line protection.
The unit must be grounded.
Installation and maintenance of this air conditioning system should only be carried out by trained and qualified personnel.
Regular maintenance operations such as cleaning the coils and air filters must be performed to keep the units in proper operating
condition.
EN/FR 035T83112-001
The units are shipped complete with a charge of R22 / R407C refrigerant sufficient for a piping length of 7.5 meters.
Four ibration absorbing mounts are deli ered with each unit as well as a drainage elbow connector for condensate
drain connection (on heat pump models only).
From size 25 upwards, outdoor units are fitted with transport handles to facilitate handling and placement.
E ery compressor is deli ered with a sound-proofing wrap to reduce noise le els to a strict minimum.
The unit support plate is shaped in such a way that water produced during defrost operations on heat pump units is
collected at a single point where it can easily drained off. No accessory drain pan is required.

TECHNICAL SPECIFICATIONS
CONDENSING UNIT (MOC-MOH) R22 - 50 Hz
CONDENSING UNIT (MOC-MOH) R22 - 0 Hz
CONDENSING UNIT R407C
Models
inch
inch
Suction
Liquid
Pipe Size
Type
Piping
Weight
mm
mm
mm
Compressor Type
Qty
Height
Width
Depth
Dimension
Compressor
gr
Refrigerant Charge (MOC/MOH)
Refrigerant Type
Running Current A
A
kW
Power Consumption
Power Supply V/Ph/Hz
Ph
Outdoor
Unit
Cooling
Heating
kg
Outdoor Unit
Max. Starting Current
Models
inch
inch
Suction
Liquid
Pipe Size
Type
Piping
Weight
mm
mm
mm
Compressor Type
Qty
Height
Width
Depth
Dimension
Compressor
gr
Refrigerant Charge (MOC/MOH)
Refrigerant Type
Running Current A
A
kW
Power Consumption
Power Supply V/Ph/Hz
Ph
Outdoor
Unit
Cooling
Heating
kg
Outdoor Unit
Max. Starting Current
Models
inch
inch
Suction
Liquid
Pipe Size
Type
Piping
Weight
mm
mm
mm
Compressor Type
Qty
Height
Width
Depth
Dimension
Compressor
gr
Refrigerant Charge (MOC/MOH)
Refrigerant Type
Running Current A
A
kW
Power Consumption
Power Supply V/Ph/Hz
Ph
Outdoor
Unit
Cooling
Heating
kg
Outdoor Unit
Max. Starting Current
Remark: 1. The abo e design and specifications are subject to change without prior notice for product impro ement.
2. For Master Gold (Gold fin) = Gold-coloured coated aluminum.
kg
kg
MOC-MOH
R22
Flare + Nuts
09
1
0.99
4.55
21.50
800/1090
1
Rotary
492
764
230
36
37
3/8
1/4
12
1
1.20
5.60
29
1140/1160
1
492
764
230
38
39
1/2
1/4
18
1
1.96
9.30
47
1800/1800
1
590
820
280
56
58
5/8
3/8
1
2.55
12.34
61
1650/1600
1
696
850
285
65
67
5/8
3/8
25
3
3.53
6.77
48
1
35
5/8
3/8
3
5.71
9.10
53
3
6.79
11.72
62
3000/3000
1
1142
850
285
87
88
3/4
3/8
45
3800/3800
1
1142
1060
345
109
111
3/4
3/8
55
900
850
285
76
77
208-230/1/60 or 460/3/60
Reciprocating
2800/2500
1
3.57
16.17
81
1
5/8
3/8
220-240/1/50 or 380-415/3/50
MOC-MOH
R22
Scroll
Flare + Nuts
07
1
0.78
3.6
20
620/650
1
Rotary
492
764
230
35
36
3/8
1/4
09
1
0.97
4.49
21
800/1000
1
492
764
230
36
37
3/8
1/4
12
1
1.21
5.59
28
1140/1160
1
492
764
230
38
39
1/2
1/4
18
1
1.77
8.29
43
1620/1620
1
590
820
280
56
58
5/8
3/8
1
2.52
11.44
70
1650/1600
1
696
850
285
65
67
5/8
3/8
25 35
1
3.55
16.35
79
2800/2500
900
850
285
5/8
3/8
3
3.59
6.65
42
45
3
4.61
8.88
55
3450/3450
1
1142
850
285
87
88
3/4
3/8
55
3
5.02
10.64
55
4100/4100
1
1142
1060
345
109
111
3/4
3/8
5
3
5.93
12.04
66
6400/6400
1
1142
1060
345
129
131
3/4
3/8
11
900
850
285
76
77
5/8
3/8
220-240/1/50 or 380-415/3/50
MOC-MOH
R407C
Flare + Nuts
07G
1
0.79
3.59
17
850/1000
1
Rotary
492
764
230
35
36
3/8
1/4
09G
1
0.95
4.39
21
720/1000
1
492
764
230
36
37
3/8
1/4
12G
1
1.21
5.59
28
1150/1150
1
492
764
230
38
39
1/2
1/4
18G
1
1.77
8.29
43
1880/1880
1
590
820
280
56
58
5/8
3/8
1
2.61
12.24
74
2100/2100
1
696
850
285
65
67
5/8
3/8
25G
1
3.53
16.75
91
35G
3
3.41
6.45
44
3000/2500
5/8
3/8
45G
5.00
10.84
55
3450/3450
1
1142
1060
345
109
111
3/4
3/8
55G
3
5.43
11.24
55
4100/4100
1
1142
1060
345
109
111
3/4
3/8
5G
6.28
12.64
66
6400/6400
1
1142
1060
345
129
131
3/4
3/8
900
1060
345
Scroll
11
89
91
900
1060
345
5/8
3/8
380-420/3/50
kg

DIMENSIONS
OVERALL DIMENSIONS
OUTDOOR UNIT CLEARANCES
NOTE
WD
H
H
WD
W
D
H
ADEB
C
BA DE
A
C
EBD
C
LI
MOC/MOH (mm)
A
B
C
D
E
MOC/MOH
07-09-12
18
25-35-45
40-55- 5
L (cm)
49.7
51.7
55
74
I (cm)
24.8
29.6
31.5
37.5
18 25 35
200
400
100
210
600
200
400
100
210
800
200
400
100
210
800
200
400
100
300
800
200
400
100
300
800
200
400
100
300
800
200
400
100
300
800
40 45 55 5
07-12
400
200
100
210
600
To pre ent ice build up beneath the unit during winter
operation, it may be necessary to increase the
dimension of C by 50 to 100 mm.
MOC/MOH 07-18 MOC/MOH 25-35 MOC/MOH 40- 5
MOC/MOH 07-18 MOC/MOH 25-35 MOC/MOH 40- 5
A minimum of clearance is necessary around the units to ensure proper air circulation and easy access for maintenance.
Distances between mounting hole centres
Unit dimensions are shown in Technical Specification table.

INSTALLATION
OK
Unit installation details:
 unit mounting
 refrigerant piping connections
Whatever type of installation is chosen for
the unit, the following installation rules must
be observed:
 The location selected for unit installation must be capable
of withstanding the weight of the unit in its full operating
configuration.
 Select a location where neither dust nor other foreign
bodies will clog the unit coil.
 If the outdoor unit is installed on the ground, make sure that
the location is not liable to flooding.
 Make sure that you know and apply any and all local
rules and regulations concerning the installation of air
conditioning equipment.
 Use the ibration isolators pro ided to pre ent ibration
transmission and resulting unnecessary noise.

Do not install the equipment in explosi e en ironments.
 Make sure that the surrounding atmosphere does not
contain noxious or dangerous substances such as oil
apours or sulphur.
 If the air conditioner is installed in a polluted area,
increase the frequency of maintenance operations.
 A oid installing the unit where it will be in direct sunlight,
especially if it is a cooling only model since direct sunlight
will increase condensing pressure and reduce unit efficiency.
Install units facing North whene er possible.
 In particularly windy places, the unit should be installed so
that the pre ailing wind does not interfere with air discharge
from the unit (configuration with the wind blowing onto the
side of the unit).
 MOH heat pump unit : install the unit at least 10 cm abo e
ground le el to facilitate drainage of defrost water and
pre ent accumulation of ice. In effect, defrost water can
cause accumulation of ice under the unit during subfreezing
outdoor temperatures.
 condensate water drainage connections
 unit wiring connection
 Where er possible, install the unit where it will be protected
from rain, snow and runoff from o erhanging structures.
 In areas with hea y snowfall it is best to install the unit on
wall supports.
 If condensates are not to be drained, do not install the elbow
supplied with the unit.
 Make sure that the unit is installed le el so that condensate
will drain off correctly.

In some regions. It is necessary to heat the bottom of the
condensate drainage pan and the condensate drainage
piping to a oid ice formation, and resulting ice build-up in
the fan compartment (heater strip must be at least 25 W/m).

D
L
L
H
NOTE
Unit size
g/m
07
15
09
15
12
15
18
40
25
40
35
40
40
40
45
60
55
60
5
60
Insulation
Heat pump
Liquid
Cooling Cooling
(suction)
Heat pump
(discharge)
Heat
pump
Liquid
GAS
Cooling
(suction) Cooling
Low pressure High pressure
Manifold
Gas al e
Liquid al e
Pressure tap
Outdoor unit Gas line Indoor unit
Liquid line
R22 / R407C
Where the difference in ele ation between the indoor unit
and the outdoor unit is greater than 5 meters, install an
oil trap e ery 5 meters.
The suction line must ha e a 2% gradient up to the
compressor on horizontal sections.
Where piping lengths are unusually long and include a
large number of oil traps, it may be necessary to adjust
the compressor oil charge.
 Refrigerant charge to be added per extra meter
of piping length when more than 7.5 m.
Refrigerant piping connections
(FLARE connections)
To a oid alteration of unit capacities, check that piping
lengths and changes in ele ation are kept to a strict
minimum.
Before connecting the refrigerant lines, follow the procedures
below (if pre-charged connection lines are not supplied):
 Select copper pipe diameters according to the size of
unit to be installed.
 Install the refrigeration lines, checking that no foreign
bodies get inside the piping.
 Install the flare connectors and flare the ends of the pipes.
Heat pump
(discharge)
 E acuate the piping. This operation, which should last at
least 15 minutes or e en longer if there are large piping
lengths and changes in ele ation, should be followed by a
leak test.
 To this effect, when the piping has been e acuated, close
the pressure gauge tap, note the alue on the gauge, then
wait for 15 minutes. If the needle mo es, there is a leak in
the system. Make the necessary adjustments or repairs
and repeat this procedure until the needle no longer mo es.
 Open the ser ice al es and top up the refrigerant charge
if necessary.
Minimum thickness 6 mm
REFRIGERANT CIRCUIT CONNECTIONS
PIPE LENGTHS
 Maximum piping lengths
MOC-MOH
D (m)
L (m)
H (m)
07
12
15
10
09
12
15
10
12
15
18
12
18
15
18
12
25
22
25
20
35
22
25
20
40
26
30
24
45
26
30
24
55
26
30
24
5
26
30
24
Make piping runs as short as possible and a oid all unnecessary
changes in direction or ele ation.
To pre ent heat loss, the two lines must be insulated
separately.
Use an appropriate bending tool to form cur es and a oid
flattening the refrigerant tubes.
Fix piping with pipe clamps and check that any e entual pipe
ibrations cannot be transmitted to the building structure.
Use refrigeration quality piping only with an operating pressure
rating of at least 30 bars. Ne er use ordinary <<plumbing>>
quality piping : you MUST use special deoxidized, dehydrated,
refrigerant quality copper piping.

CORRECTION FACTORS FOR INTERCONNECTING PIPE WORK MO35- 5
Remarks: 1. H is the Height difference of the outdoor unit abo e the indoor unit.
2. If indoor is installed abo e outdoor, please use 0.97 to multiply the result from the table abo e.
3. Piping length is in equi alent pipe length in meters.
For calculation of equi alent meters from measured pipe length, refer to piping applications information.
MO35 (Rotary Compressor)
MO45- 5 (Scroll Compressor)
0.917
0.913
0.910
0.907
0.903
0.900
0.897
0.894
0.891
0.887
0.884
0.881
0.878
0.875
0.872
0.869
0.866
0.864
0.861
0.858
0.855
0.852
0.907
0.903
0.900
0.897
0.893
0.890
0.887
0.884
0.881
0.877
0.874
0.871
0.868
0.865
0.862
0.859
0.856
0.854
0.851
0.848
0.845
0.842
0.901
0.897
0.894
0.890
0.887
0.884
0.881
0.878
0.875
0.871
0.868
0.865
0.862
0.859
0.856
0.853
0.850
0.848
0.845
0.842
0.839
0.836
0.885
0.881
0.878
0.874
0.871
0.868
0.865
0.862
0.859
0.855
0.852
0.849
0.846
0.843
0.840
0.837
0.834
0.832
0.829
0.826
0.823
0.820
0.853
0.849
0.846
0.842
0.839
0.836
0.833
0.830
0.827
0.823
0.820
0.817
0.814
0.811
0.808
0.805
0.802
0.800
0.797
0.794
0.791
0.788
0.837
0.833
0.830
0.826
0.823
0.820
0.817
0.814
0.811
0.807
0.804
0.801
0.798
0.795
0.792
0.789
0.786
0.784
0.781
0.778
0.775
0.772
0.821
0.817
0.814
0.810
0.807
0.804
0.801
0.798
0.795
0.791
0.788
0.785
0.782
0.779
0.776
0.773
0.770
0.768
0.765
0.762
0.759
0.756
7.5
8
9
10
11
12
13
14
15
1
17
18
19
20
21
22
23
24
25
2
27
28
29
30
31
32
33
34
35
3
37
38
39
40
41
42
43
44
45
4
47
48
49
50
0.997
0.995
0.991
0.987
0.983
0.979
0.975
0.971
0.968
0.964
0.960
0.956
0.952
0.949
0.945
0.941
0.938
0.934
0.931
0.927
0.924
0.920
0.987
0.985
0.981
0.977
0.973
0.969
0.965
0.961
0.958
0.954
0.950
0.946
0.942
0.939
0.935
0.931
0.928
0.924
0.921
0.917
0.914
0.910
0.981
0.979
0.975
0.971
0.967
0.963
0.959
0.955
0.952
0.948
0.944
0.940
0.936
0.932
0.929
0.925
0.922
0.918
0.915
0.911
0.908
0.904
0.965
0.963
0.959
0.955
0.951
0.947
0.943
0.939
0.936
0.932
0.928
0.924
0.920
0.916
0.913
0.909
0.906
0.902
0.899
0.895
0.892
0.888
0.933
0.931
0.927
0.923
0.919
0.915
0.911
0.907
0.904
0.900
0.896
0.892
0.888
0.884
0.881
0.877
0.874
0.870
0.867
0.863
0.860
0.856
0.917
0.915
0.911
0.907
0.903
0.899
0.895
0.891
0.888
0.884
0.880
0.876
0.872
0.868
0.865
0.861
0.858
0.854
0.851
0.847
0.844
0.840
0.901
0.899
0.895
0.891
0.887
0.883
0.879
0.875
0.872
0.868
0.864
0.860
0.856
0.852
0.849
0.845
0.842
0.838
0.835
0.831
0.828
0.824
Pipe
Length
(L) H=0 m H=3 m H=5 m H=10 m H=20 m H=25 m H=30 m
Pipe
Length
(L) H=0 m H=3 m H=5 m H=10 m H=20 m H=25 m H=30 m
0.974
0.973
0.972
0.971
0.970
0.969
0.969
0.968
0.967
0.966
0.965
0.964
0.963
0.963
0.962
0.961
0.960
0.959
0.958
0.957
0.957
0.956
0.964
0.963
0.962
0.961
0.960
0.959
0.959
0.958
0.957
0.956
0.955
0.954
0.953
0.953
0.952
0.951
0.950
0.949
0.948
0.947
0.947
0.946
0.958
0.957
0.956
0.955
0.954
0.953
0.953
0.952
0.951
0.950
0.949
0.948
0.947
0.947
0.946
0.945
0.944
0.943
0.942
0.941
0.941
0.940
0.939
0.938
0.937
0.936
0.935
0.934
0.933
0.932
0.931
0.930
0.929
0.928
0.927
0.926
0.925
0.924
0.923
0.922
0.921
0.920
0.919
0.918
0.907
0.906
0.905
0.904
0.903
0.902
0.901
0.900
0.899
0.898
0.897
0.896
0.895
0.894
0.893
0.892
0.891
0.890
0.889
0.888
0.887
0.886
0.891
0.890
0.889
0.888
0.887
0.886
0.885
0.884
0.883
0.882
0.881
0.880
0.879
0.878
0.877
0.876
0.875
0.874
0.873
0.872
0.871
0.870
0.875
0.874
0.873
0.872
0.871
0.870
0.869
0.868
0.867
0.866
0.865
0.864
0.863
0.862
0.861
0.860
0.859
0.858
0.857
0.856
0.855
0.854
7
8
9
10
11
12
13
14
15
1
17
18
19
20
21
22
23
24
25
2
27
28
29
30
31
32
33
34
35
3
37
38
39
40
41
42
43
44
45
4
47
48
49
50
0.993
0.992
0.991
0.990
0.989
0.988
0.987
0.987
0.986
0.985
0.984
0.983
0.982
0.981
0.981
0.980
0.979
0.978
0.977
0.976
0.975
0.975
0.983
0.982
0.981
0.980
0.979
0.978
0.977
0.977
0.976
0.975
0.974
0.973
0.972
0.971
0.971
0.970
0.969
0.968
0.967
0.966
0.965
0.965
0.977
0.976
0.975
0.974
0.973
0.972
0.971
0.971
0.970
0.969
0.968
0.967
0.966
0.965
0.965
0.964
0.963
0.962
0.961
0.960
0.959
0.959
0.961
0.960
0.959
0.958
0.957
0.956
0.955
0.954
0.953
0.952
0.951
0.950
0.949
0.948
0.947
0.946
0.945
0.944
0.943
0.942
0.941
0.940
0.929
0.928
0.927
0.926
0.925
0.924
0.923
0.922
0.921
0.920
0.919
0.918
0.917
0.916
0.915
0.914
0.913
0.912
0.911
0.910
0.909
0.908
0.913
0.912
0.911
0.910
0.909
0.908
0.907
0.906
0.905
0.904
0.903
0.902
0.901
0.900
0.899
0.898
0.897
0.896
0.895
0.894
0.893
0.892
0.897
0.896
0.895
0.894
0.893
0.892
0.891
0.890
0.889
0.888
0.887
0.886
0.885
0.884
0.883
0.882
0.881
0.880
0.879
0.878
0.877
0.876
Pipe
Length
(L) H=0 m H=3 m H=5 m H=10 m H=20 m H=25 m H=30 m
Pipe
Length
(L) H=0 m H=3 m H=5 m H=10 m H=20 m H=25 m H=30 m
The following chart can be used as a guide and are based on the assumption that the piping installed will not exceed 20kPa
pressure drop for suction or liquid line. The capacity gi en for the standard may be multiplied by the factor gi en below to pro ide
the de-rated capacity.

ELECTRICAL CONNECTIONS
N12
LN 12
N1 32
LN 132
N12
L1 L 2 L 3 N 12
N1 23
N123
L1 L 2 L 3
MOC-MOH
Power supply
mm2
Ph
Interconnection
(Indoor/Outdoor)
Cooling mm
2
Heating mm
2
Fuse (slow-blow) A
07 09 12 18 25 35 40 45 55 5
111 1 31313 1 1 3 3 3
3x2.5 3x4 5x2.5 5x4
3x2.5
4x2.5
10 32 1616 10 25 10 35 40 16 20 25
Power supply
220-240V/1Ph/50Hz
208-230V/1Ph/60Hz
MOC 07 - 35 - Cooling only Indoor unit
Outdoor unit
MOC 25 - 5 - Cooling only Indoor unit
Outdoor unit
Power supply
380-415V/3Ph/50Hz
460V/3Ph/60Hz
Wire sizes
Terminals N and 1 (see diagrams abo e) correspond to power
supply to the indoor unit coming from the outdoor
unit.
Compressor power supply is established by terminal 2.
Power supply to the 4-way al e is established by terminal 3.
For further details on wiring of these units, see the diagrams
pasted inside each unit.
MOH 07 - 35 - Heat pump Indoor unit
Outdoor unit
Outdoor unit
Power supply
220-240V/1Ph/50Hz
208-230V/1Ph/60Hz
MOH 25 - 5 - Heat pump Indoor unit
Power supply
380-415V/3Ph/50Hz
460V/3Ph/60Hz
START-UP
Before starting the air conditioner, please check the following points:
- That the unit is installed according to instructions gi en in this
documentation.
- That the unit is correctly wired up.
- That flare connection nuts are tightened.
- That the unit has been e acuated and leak-tested.
- That isolating al es ha e been fully opened.
- That the refrigerant charge has been topped-up if necessary.
Start the units and check operation in both the cooling and the heating mode.
Unit base plate
Compressor
Diagram n°1
MOC 18 - MOH 18
Coil
DEFROST
Defrost is handled ia a defrost management electronic control
board (model with two potential meters and 6 dip
switches, see diagram n°2). This enables defrost cycles to be
initiated when the temperature reaches -5°C at the condenser
coil bend. The end of defrost cycle set point is +10°C. The
duration of the defrost cycle aries depending on operating
conditions but it is limited to a maximum of 10 minutes. Time
delay between successi e defrost cycles is 30 minutes.
The defrost cycle can be forced into action by shunting terminals
DEF on the defrost control board in the outdoor unit.
The time delay between successi e defrost cycles and the
maximum duration of each cycle are adjustable. If these
need to modified, please contact YORK first for technical ad ice.
If your unit does not defrost correctly, please check the follow
points carefully:
- Is the refrigerant charge correct ?
- Is the sensor in the right location on the outdoor coil ?
- Low and high pressure switch settings on units :
MOC-MOH 35-45-55 LP = 1.5 Bars HP = 28 Bars
1Dip Switches for adjusting time delay between defrost
cycles and maximum defrost cycle duration.
2Female sensor connection
3Shunt these terminals to stimulate a defrost cycle.
1 2 3 4 5
DEF
ON
2
1
3
Diagram n°2 - Adjustable Defrost Control Board
Transformer

FAN SPEED CONTROLLER
1 2 3 4
13
4
9
7
8
2
5
6
95
100
4- ø5.4
Note : For ery low temperature operation in cooling mode we
recommend to set the Changeo er Switch to cut-off
position.
NO.
1.
2.
3.
4.
5.
.
7.
8.
9.
Parts Name
Bellows
Wiper
Operating Plate
Range Adjusting Screw
Coil Spring
Terminal Board
Changeover Switch
Pressure Connector
Range Setting Pointer
Indoor unit
Copper Packing
Cut
Off
Min
Speed
Slide Potentiometer
(CW)
Increase the
set al e
Decrease the
set al e
(CCW)
Capillary Tube
(900 mm Length) Conduit Gland
1/4 Female Flare with Schrader
COOLING CIRCUIT - PRESSURE TAP LOCATION
PRESSURE TAP
Outdoor unit
C a u t i o n
Risk of electric shock
A fan speed controller is pro ided as standard on full featured condensing units and can be installed also as an accessory in the
field on all N series condensing units that are equipped with a pressure tap (see diagram below) for easy installation. The
Saginomiya pressure type controller (YORK P/N 025T20003-000) is recommended. Fan speed controllers should be added when
the units are installed where operation in cool mode is required during periods with low outdoor ambient temperatures. Complete
installation instructions are included with e ery fan speed controller kit ordered from the factory.

PHASE ROTATION
Scroll compressors designed to operate only in one direction. If opposite direction is required, swamp any two
phases at the main terminal block. Reciprocating compressors are able to run in either direction without any loss of
performance or reliability.
Special Note for units fitted with Scroll Compressors
Phase sequencing: the Scroll compressor is designed to operate with motor running in only direction. Mis-wiring of
phase power (phase re ersal) will cause the compressor to operate in the wrong direction. The Scroll compressor
will run without damaging itself if phasing is improper, but it will not pump refrigerant and will draw minimal current.
In such a case, the internal winding line break will ultimately shut off the compressor. Depending upon the conditions
it could take up to 30 minutes to trip the internal winding protection. The compressor will be noisy, ibrate excessi ely
and the oil sump will become warm to hot when running backwards.
Because of the scroll compressor design and its capability to accommodate liquid slugging, both oil and refrigerant,
without causing compressor damage, there are some characteristic sounds that differentiate if from those normally
associated with reciprocating type compressors.
These sounds described below, are characteristics and do not affect reliability or indicate that the compressor is
defecti e.
Cautions
1. Three phase scrolls will only pump when running in right direction.
2. Verify rotation on initial start up by checking pressure.
3. To correct improper motor rotation, switch any two supply lines.
At Start-up:
Under conditions of low refrigerant flows (low suction pressures) such as start-up, a rating sound may emanate from
the compressor.
This is more like to be heard under conditions such as low ambient starts where it takes time to build sufficient head
pressure to allow the thermal expansion al e to flow sufficient refrigerant to increase the suction pressure. This
sound should diminish and disappear as the suction pressure increases.
At Shutdown:
The gas within the scroll expands and causes momentary re erse rotation until the discharge check al e seats.
This results in a flutter type noise.
Refrigerant Flooding:
If the compressor experience se ere liquid slugging during the operation the compressor will make a loud rattling
sound.
This is normal because of the separation of the scrolls that allow the liquid refrigerant to pass through the compressor
without damaging it.

TROUBLE SHOOTING GUIDE
NOTE
The compressor and outdoor fan
do not operate
The outdoor fans run but the
compressor will not start
Low refrigerant charge
insufficient airflow
The compressor runs continuously
The compressor starts but shuts
down quickly on thermal protection
Power failure
Fuse blown or circuit breaker open
Voltage is too low
Faulty contactor, thermostat or relay
Electrical connections loose
Faulty capacitor (single phase models)
Thermostat adjustment too low (in heating
mode) or too high (in cooling mode)
Incorrect wiring, terminals loose
Pressure switch tripped (depending on mode)
Motor windings cut or grounded
Faulty capacitor (single phase models)
Make sure there are no leaks
Check the air filter, the damper positions
Check that air is not being recycled
Check cleanliness of unit coils
Capillaries obstructed or orifice plugged
(humidity)
Liquid and gas lines insulated together
Thermostat adjustment too high (in heating
mode) or too low (in cooling mode)
No fan operation or faulty fan
Reffrigerant charge too low, leakage
Heating/cooling load underestimated
Air or incondensables in refrigerant circuit
Too much or too little refrigerant
Air or incondensibles in refrigerant circuit
Faulty compressor
Power supply oltage too high or too low
Faulty condenser (single phase models)
Faulty thermostat
Restriction in the refrigeration circuit
Frostec or plugged expansion de ice
Poor airflow on indoor or outdoor unit
Faulty power supply
Changeo er al e damaged or blocked open
(heat pump units)
Unit short-cycles
The Compressor runs too long or continuously
Insufficient heating or cooling
No heating or cooling
Cause
Symptoms
Contact the electrical utility company
Replace the fuse or reset the breaker
Find the cause and fix it
Replace the faulty component
Retighten the connections if necessary
Find the cause, then replace capacitor
Check thermostat setting
Check and retighten
Find the cause, then reset
Check the wiring and the compressor winding
resistance
Find the cause, then replace capacitor
Remo e charge, repair, e acuate and recharge
Clean or replace, set the air damper to the right
position
Clean the coils
Remo e charge, repair, e acuate and
recharge
Insulate them separately
Change the setting
Check condenser air circulation
Find leak, repair and recharge
Reduce load or use next unit size up
Remo e charge, e acuate and recharge
Remo e charge, e acuate and recharge
Remo e charge, e acuate and recharge
Determine the cause and replace compressor
Sol e the problem
Determine the cause and replace
Replace
Find restriction and repair
Remo e charge, e acuate and recharge
Clean the coil and the filter if necessary, check
that motors are operating properly
Check wire gauges, etc
Replace it
Remedy Cause
Symptoms Remedy
Ice build-up indoor coil
Faulty installation
Compressor noisy
Thermostat
Safety de ice
Excessi e discharge pressure
Insufficient discharge pressure
Excessi e suction pressure
Insufficient suction pressure
Low refrigerant charge, refrigerant leak
Insufficient airflow
Low operating temperature limit exceeded
Frosted Indoor coil
Make sure ibration isolators ha e been
installed.
Check piping collars
Make sure that the compressor is not losing
oil
Excessi e oil or refrigerant charge
Thermostat incorrectly adjusted
Check continuity through fuse
Safety thermostat opens
Faulty unit wiring
Out door coil dirty
Indoor unit fan (heating mode) or outdoor
unit fan (cooling mode) faulty
Excessi e refrigerant charge
Air or incondensables in refrigerant circuit
Refrigerant charge too low
Liquid line blocked or crushed
Compressor al es worn out or leaking
Refrigerant o ercharge
Cycle changeo er al e faulty or leaking
(heat pump units)
Low refrigerant charge
Outdoor unit coil (heating mode) or indoor
unit coil (cooling mode frosted)
Insufficient airflow on the outdoor unit coil
(heating mode) or the indoor unit coil
(cooling mode)
Suction line obstructed
Expansion de ice obstructed or iced up
Poor contact the line and the defrost sensor
in the heating mode (heat pump units)
Condenser airflow too high (in the cooling
mode) in relation to outdoor air temperature
Repair the leak and recharge
Check the condition of the air filters
Check the cleanliness of the indoor coil
Check fan motor operation
Check that the air damper opens correctly
(on unit equipped with a damper)
Install a low temperature kit
Tighten any loose components
Repair and add oil
Repair or replace the thermostat
Readjust the thermostat
Remo e excess charge
Replace faulty elements
Check indoor unit airflow
Check cleanliness of air filter and coil
Open air balancing dampers
If ducts are long, inhibit low, and perhaps e en
medium fan speeds
Check that wiring complies with applicable
diagrams
Clean the coil
Replace the fan
Remo e excess charge
Check the circuit, e acuate, and recharge
Find and repair the leak, top up refrigerant
charge
Find obstructions and eliminate them
Replace the compressor
Remo e excess refrigerant
Replace the al e
Add some refrigerant
Find cause and fix it
Make sure that the indoor or outdoor unit fan
is operation properly
Find obstruction and eliminate
Remo e charge, e acuate, recharge
Reinstall the sensor correctly using a contact
compound. Insulate the assembly
Install a low temperature kit
Unit noisy
Electric heat does not work (on indoor units fitted with this option)
Excessive or insufficient suction pressure
Excessive or insufficient discharge pressure
Open the main unit power switch before proceeding with any repair operations.

TECHNICAL APPENDIX
2
8
3
5
4
5
1
2
8
3
10
5
4
5
9
7
1
2
5
5
1
3
4
10
5
4
3
8
1
10 10
23
19
14
Indoor Temperature
°C WB
Indoor Temperature °C DB
19
-
1.10
0.88
25
1.20
1.08
0.86
30
1.15
1.04
0.84
35
1.11
1
0.82
40
1.06
0.96
0.79
4
1
0.90
0.74
23
21
17
Indoor Temperature
°C WB
Indoor Temperature °C WB
14
1.20
1.25
1.30
10
1.04
1.10
1.13
0.96
1
1.04
0
0.77
0.80
0.83
-8
0.58
0.69
0.63
Piping length (m)
Correction factor C2
Indoor unit
5
1.00
10
0.98
Fan speed
Correction factor C3
Indoor unit
High
1
Medium
0.90
Low
0.75
Cooling mode
Heating mode
Maximum
+ 28°C (heat pump mode)
+ 19°C
(-5 with low ambient kit)
+ 46°C
- 8°C
Minimum
Legend:
1. Compressor
2. Outdoor unit coil
3. Combined HP/LP pressure switch
(manual reset for the HP switch)
4. Indoor unit coil
5. Refrigerant circuit piping
Cooling circuit diagrams
Outdoor unit
Cooling only - MOC 07-09-12-18-25
Outdoor unit Indoor unit
Heat pump - MOH 07-09-12-18-25
Outdoor unit Indoor unit
Cooling only - MOC 35-40-45-55- 5
Outdoor unit Indoor unit
Heat pump - MOH 07-09-12-18-25
6. Isolating al e with pressure tap
7. HP pressure switch (Interseason start-up safety)
8. 4-way cycle changeo er al e
9. Anti-slugging recei er
10. Restrictor
Unit Capacity
Total cooling capacity can be determined by using correction factors C1, C2 and C3.
Gi en cooling capacity = Cooling capacity at standard rating conditions x C1 x C2 x C3.
C1 = Capacity correction factor for temperature
C2 = Capacity correction factor for piping length
C3 = Capacity correction factor for indoor unit fan speed
Capacity correction factor for temperature (C1)
Cooling Capacity correction factor for temperature
Capacity correction factor for piping length (C2)
Correction factors (C1) determine the instantaneous capacity (which does not take account of defrosting on heat pump units).
These capacities may ary slightly, depending on the size of the unit.
Capacity correction factor for indoor unit fan speed (C3)
Operating temperature limits
Heating Capacity correction factor for temperature
Indoor unit
Legend:
1. Compressor
2. Outdoor unit coil
3. Capillary tube
4. Indoor unit coil
5. Refrigerant circuit piping
6. Isolating al e with pressure tap
7. HP pressure switch (Interseason start-up safety)
8. 4-way cycle changeo er al e
9. Anti-slugging recei er
10. Restrictor

MINISPLIT UNIT START-UP CHECK-LIST
Power supply cable
Interconnection cable
Type of line protection
Refrigeration piping
Position of indoor unit
Dif. in ele ation between units
Changes in direction
Condensate pump
Condensate drainage
E aporator
Condenser
Temperature measurements
Low temperature kit
Fan rotation correct (direction)
Suction pressure
Discharge pressure
Compressor Amps
Control thermostat
Low pressure switch
High pressure switch
Refrigerant charge top-up
Oil top-up
Checked unit charge
Power supply and unit
interconnection cables
with corresponding currents
Contractor
Location:
Order/in oice number:
Installation start-up date:
Single phase
Ph/N= V
Ph= A
Gauge= mm
2
Gauge= mm
2
Type
Equipment reference numbers
Indoor unit
Type
Serial Number
Ø liquid= in.
Ø gas= in.
Height of the unit= m
indoor > outdoor m
Number of oil traps =
Pumping height= m
U-Bend  yes  no
Return air temperature= °C
Inlet air temperature= °C
Superheat= °C
 yes
 yes
LP at low speed= Bar
HP at low speed= Bar
l at low speed= A
cut out (open)= °C
trip= Bar
trip= Bar
 yes / quality= g
 yes / quality= g
 yes
Check that all electrical connections are light and that the unit is property earthed
Outdoor unit
Type
Serial Number
3 Ph1-2 = V A
Ph2-3 = V A
Ph3-1 = V A
Neutral
yes
no
Earth
yes
no
Length= m
Length= m
Current= A
l. liquid= m
l. gas= m
Height of the room= m
ext > int m
Number of bends=
Type of drainage=
Ø drainage piping= cm
Air discharge temp.= °C
Outlet air temp.= °C
Sub-cooling= °C
 no
 no
LP at high speed= Bar
HP at high speed= Bar
l at high speed= A
cut out (closed)= °C
reset= Bar
reset= Bar
 no
 no
 no
Check that you ha e: Completely opened the isolating al es.
Insulated the gas and liquid lines separately.
Tightened all flare connections.
Leak-tested the entire installation.
E acuated the refrigeration circuit.
Tested all functions of the air conditioner in the heating
and the cooling mode.
Tested the crankcase heater for correct operation.
Installed the units in accordance with all instructions
gi en in the documentation.
Name, address and phone number of your contractor:
DECLARATION OF CONFORMITY
DE - COMMISSIONING DISMANTLING & DISPOSAL
This product contains refrigerant under pressure, rotating parts, and electrical connections which may be a
danger and cause injury!
All work must only be carried out by competent persons using suitable protective clothing and safety precautions.
Read the Manual Risk of electric shock Unit is remotely
controlled and may
start without warning
1. Isolate all sources of electrical supply to the unit including any control system supplies switched by the unit. Ensure
that all points of electrical and gas isolation are secured in the OFF position. The supply cables and gas pipework
may then be disconnected and remo ed. For points of connection refer to unit installation instructions.
2. Remo e all refrigerant from each system of the unit into a suitable container using a refrigerant reclaim or reco ery unit.
This refrigerant may then be reused, if appropriate, or returned to the manufacturer for disposal.Under No
circumstances should refrigerant be vented to atmosphere. Where appropriate, drain the refrigerant oil from each
system into a suitable container and dispose of according to local laws and regulations go erning disposal of oily
wastes.
3. Packaged unit can generally be remo ed in one piece after disconnection as abo e. Any fixing down bolts should
be remo ed and then unit lifted from position using the points pro ided and equipment of adequate lifting capacity.
Reference MUST be made to the unit installation instructions for unit weight and correct methods of lifting. Note that
any residual or spilt refrigerant oil should be mopped up and disposed of as described abo e.
4. After remo al from position the unit parts may be disposed of according to local laws and regulations.
Type of Equipment Air Conditioners
Brand Name York
Type Designation MHH/C07-35, MAH/C18- , MCH/C09-55, MI12-35, MKH/C25-55
MOH/C07- 5, HHH, HHW, HHY, HAW, HAY, HIW, HIY, HCH, HCW, HCY, MMH/C
Manufacturer York Industrial Thailand Co., Ltd.
Laemchabang Industrial Estate, Export Processing Zone 2,
49/40 Moo 5, Tambon Tungsukla, Amphur Sriracha, Chonburi 20230, Thailand.
Tel : ( -38) 493-400
Fax : ( -38) 493-421-4
Application of Council Low Voltage Directive 73/23/EEC, EMC Directive 89/33 /EEC, and CE Marking
Directi e(s) Directive 93/ 8/EEC
The following harmonized standards ha e been applied:
Standard(s) Test report(s) Issued by Date(s)
EN 0 335-2-40:97 0038222 SEMKO 2001-02-22
EN 0 335-1:94, A11, A1, A12, A13, A14 0038222 SEMKO 2001-02-22
EN55014-1 (1993) and Amendment A1(1997) 0043237D, E SEMKO 2001-10-28
EN 0555-3 (1987) and Amendment A1(1991) 0043237D, E SEMKO 2000-10-28
EN 1000-3-2 (1995) 0043237D, E SEMKO 2000-10-28
EN5014-2 (1997) 0043237D SEMKO 2000-10-28
The product complies with the harmonized European safety standards and harmonized EMC standards
listed abo e.
We ha e internal production control system that ensures compliance between the manufacturer products and
the technical documentation.
The product is CE mark in 2001
We declare under our sole responsibility that the equipment follows the pro isions of the Directi es stated
abo e.
2001-3-05
York Industrial Thailand Co., Ltd.
Laemchabang Industrial Estate, Export Processing Zone 2,
49/40 Moo 5, Tambon Tungsukla, Amphur Sriracha, Chonburi 20230, Thailand.
Tel : [phone] Fax : [phone]
Graham Joyce
Technical Director
035T83112-001