Floor Standing B-Series - york

TECHNICAL MANUAL
Floor Standing
B-Series
TM-YFS-0410-A
®

Table of Contents
1. Nomenclature ........................................................................................................ 1
2. Features ................................................................................................................ 2
3. Specifications ........................................................................................................ 3
General Data ............................................................................................... 3
Safety Devices ........................................................................................... 11
4. Application Information ........................................................................................ 12
Controllers ................................................................................................. 12
5. Installation ........................................................................................................... 14
6. Wiring Diagram .................................................................................................... 21
7. Servicing & Maintenance .................................................................................... 27
8. Troubleshooting .................................................................................................. 28
9. Dimensional Data ................................................................................................ 32
10. Exploded View & Part List ................................................................................... 36
Note : Installation and maintenance are to be performed only by qualified personnel who are
familiar with local codes and regulations, and experienced with this type of equipment.
Caution : Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.
Warning : Moving machinery and electrical power hazard. May cause severe personnel
injury or death. Disconnect and lock off power before servicing equipment.
®

®
TM-YFS-0410-A
1
Y FS 150 B
1. Nomenclacture
Series
B : B Series
Capacity
150 : 150,000 Btu/h
Model Name
FS : Floor Standing
Brand
Y : York

2. Features
Easy Maintenance
The simple design concept has maintenance and servicing in mind. Access to the internal part of the unit
can be from front side of the unit by removing a few screws.
Easy and Flexible Installation
The unit is highly compact and therefore it is very easy to select a location to install the unit such that
only a small space is required.
Three Speed Motor
The unit has 3-speed direct driven centrifugal fan. The speed of the fan can be adjusted through the
electronic controller.
Filter Rack
The fan coil unit has filter rack to hold the air filter. This ensures the air flow is clean and the filter is easily
accessible for maintenance and cleaning.
Electronic Controller
Electronic Controller can display cool, dry and fan mode with auto, high, medium and low fan speed.
The temperature settings range from 16 to 30 degrees Celsius. There is a sleep function for cool mode
and programmable on/off timer 1 hour interval. The controller is built with 3 minutes restart delay timer
for compressor protection.
Safety Controls
Manual/Auto reset high pressure and low pressure cut-outs to guard against compressor damage
due to high discharge head pressure and system leakage respectively. Crankcase heater for each
compressor to prevent liquid migration, which can damage compressor valve plates, during off-cycle
and eases start-up.
TM-YFS-0410-A
2
®

®
TM-YFS-0410-A
3
Floor Standing Type - YFS-B Series
MODEL
TOTAL COOLING CAPACITY
TOTAL INPUT POWER
TOTAL RUNNING CURRENT - 3Φ
3. Specifications
INDOOR UNIT
YFS50B YFS60B
OUTDOOR UNIT
YSL50D YSL61D
Btu/h 55,000 62,000
W 16,115 18,166
W 5,480 6,232
A
V/Ph/Hz
8.97 10.20
POWER SOURCE 380-415 / 3 / 50
REFRIGERANT TYPE R-22
REFRIGERANT CONTROL (EXPANSION DEVICE) INDOOR TXV VALVE
FAN
HIGH
l/s / CFM 880 / 1861 1000 / 2115
AIR FLOW MEDIUM
l/s / CFM 709 / 1500 898 / 1900
LOW
l/s / CFM 590 / 1248 810 / 1713
TYPE
CENTRIFUGAL
INDOOR
QUANTITY
MATERIAL
1
G2 GALVANIZED STEEL Z275
DRIVE DIRECT DRIVEN
DIAMETER
mm/in
241 / 9.49
LENGTH mm/in
241 / 9.49
SOUND PRESSURE LEVEL (H/M/L) dBA
73 / 70 / 66 74 / 71 / 67
AIR FLOW
l/s / CFM 1605 / 3400 1770 / 3750
TYPE PROPELLER
QUANTITY 1
OUTDOOR MATERIAL
GLASS REINFORCED ACRYL STYRENE RESIN
DRIVE DIRECT
DIAMETER
mm/in 609.6 / 24 609.6 / 24
SOUND PRESSURE LEVEL
dBA 58 65
FAN MOTOR
TYPE 3-SPEEDS MOTOR
QUANTITY 1
INDEX OF PROTECTION (IP) IP 20
INSULATION GRADE CLASS B
INDOOR POWER SOURCE
V/Ph/Hz
220-240V / 1PH / 50HZ
RATED INPUT POWER
W 810 976
RATED RUNNING CURRENT
A 3.4 4.1
MOTOR OUTPUT
W 315 600
POLES 4 POLES
TYPE INDUCTION
QUANTITY 1
INDEX OF PROTECTION (IP)
IP24 -
INSULATION GRADE
B F
OUTDOOR
POWER SOURCE
RATED INPUT POWER
V/Ph/Hz
W 239
220-240/1/50
335
RATED RUNNING CURRENT
A 1.04 1.6
MOTOR OUTPUT
W 145 335
MOTOR SPEED
RPM 8 8
POLES 6
INDOOR CONDENSATE DRAIN SIZE mm/in
19.1 / 3/4
TYPE
PIPE
CONNECTION SIZE
LIQUID
GAS
mm/in
mm/in
9.5 / 3/8
FLARE VALVE
19.1 / 3/4
12.7 / 1/2
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.

Floor Standing Type - YFS-B Series (Cont’d)
YFS50B
YSL50D
YFS60B
YSL61D
mm/in
mm/in
mm/in
m2 /ft2 mm/in 7.00 / 0.276 9.52 / 3/8
mm/in 0.28 / 0.011 0.28 / 0.011
mm/in
ALUMINIUM (CORR. FIN)
0.11 / 0.004
ALUMINIUM (SLIT FIN)
0.11 / 0.004
m2 /ft2 0.84 / 9.04 0.87 / 9.36
2 3
18 16
TYPE
OIL TYPE DAPHNE SE56P EAL ARCTIC 22CC (POE)
OIL AMOUNT cm3 MODEL
INDOOR UNIT
OUTDOOR UNIT
COIL
MATERIAL COPPER TUBE
TUBE DIAMETER 9.53 / 0.375
THICKNESS 0.33 / 0.013
INDOOR
MATERIAL
THICKNESS
ALUMINIUM
0.115 / 0.0045
FIN
FACE AREA 0.465 / 5
ROW 3
FIN PER INCH 12
MATERIAL SEAMLESS INNER GROOVE COPPER
TUBE DIAMETER
THICKNESS
OUTDOOR
MATERIAL
THICKNESS
FIN
FACE AREA
ROW
FIN PER INCH
COMPRESSOR
SCROLL
/ fl.oz. 1400 / 47.3 1774 / 60
INSULATION GRADE
-
OUTDOOR POWER SOURCE
V/Ph/Hz
380-415 / 3 / 50
CAPACITOR
µF
NIL
RATED INPUT POWER W 4244 5000
RATED RUNNING CURRENT A 7.50 8.50
LOCKED ROTOR AMP. A 66 74
AIR QUALITY
TYPE WASHABLE FILTERS
TREATMENT 70 % EFFICIENCY
INDOOR AIR FILTER
QUANTITY
LENGTH
pc
mm/in
1
900 / 35.43
SIZE WIDTH mm/in
550 / 21.65
THICKNESS mm/in
22 / 0.87
UNIT HEIGHT
UNIT & PACKING DIMENSIONS, UNIT WEIGHT
mm/in
1950 / 76.77
DIMENSION WIDTH mm/in
530 / 20.87
() - PANEL DEPTH mm/in
710 / 27.95
INDOOR PACKING
DIMENSION
HEIGHT
WIDTH
mm/in
mm/in
2080 / 81.89
550 / 21.65
() - PANEL DEPTH mm/in
950 / 37.40
UNIT WEIGHT
kg/lb 135 / 297.62 135 / 297.62
UNIT
DIMENSION
HEIGHT
WIDTH
DEPTH
mm/in
mm/in
mm/in
852 / 33.5
1030 / 40.6
428 / 16.9
852 / 33.5
1030 / 40.6
428 / 16.9
OUTDOOR
PACKING
DIMENSION
HEIGHT
WIDTH
DEPTH
mm/in
mm/in
mm/in
958 / 37.7
1156 / 45.5
502 / 19.8
958 / 37.7
1156 / 45.5
502 / 19.8
UNIT WEIGHT
kg/lb 105 / 232 108 / 238
CASING
MATERIAL ELECTRO-GALVANIZED MILD STEEL
INDOOR UNIT
FINISHING EPOXY POLYESTER POWER COATING
COLOUR LIGHT GREY
OUTDOOR UNIT
MATERIAL
COLOUR
ELECTRO GALVANIZED MILD STEEL
LIGHT GREY
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.
TM-YFS-0410-A
4
®

®
TM-YFS-0410-A
5
Floor Standing Type - YFS-B Series
MODEL
INDOOR UNIT
OUTDOOR UNIT
MYSS72C
YFS75B
MYSS80C
TOTAL COOLING CAPACITY
Btu/h
W
70,000
20,510
77,000
22,561
TOTAL INPUT POWER
W 8,737 9,409
TOTAL RUNNING CURRENT - 3Φ
A 14.30 15.40
POWER SOURCE V/Ph/Hz
380-415 / 3 / 50
REFRIGERANT TYPE R-22
REFRIGERANT CONTROL (EXPANSION DEVICE) INDOOR TXV VALVE
FAN
HIGH l/s / CFM
1080 / 2284
AIR FLOW MEDIUM l/s / CFM
946 / 2000
LOW l/s / CFM
850 / 1798
TYPE CENTRIFUGAL
INDOOR
QUANTITY
MATERIAL
1
G2 GALVANIZED STEEL Z275
DRIVE DIRECT DRIVEN
DIAMETER mm/in
270 / 10.63
LENGTH mm/in
270 / 10.63
SOUND PRESSURE LEVEL (H/M/L) dBA
74 / 71 / 67
AIR FLOW l/s / CFM
2832 / 6000
TYPE PROPELLER
QUANTITY 1
OUTDOOR MATERIAL ALUMINUM
DRIVE DIRECT
DIAMETER mm/in
660 / 26
SOUND PRESSURE LEVEL
dBA 70 74
FAN MOTOR
TYPE 3-SPEEDS MOTOR
QUANTITY 1
INDEX OF PROTECTION (IP) -
INSULATION GRADE CLASS B
INDOOR POWER SOURCE V/Ph/Hz
220-240V / 1Ph / 50Hz
RATED INPUT POWER W
1120
RATED RUNNING CURRENT A
4.7
MOTOR OUTPUT W
600
POLES 4 POLES
TYPE PERMANENT SPLIT CAPACITOR
QUANTITY 1
INDEX OF PROTECTION (IP) IP54
OUTDOOR
INSULATION GRADE
POWER SOURCE V/Ph/Hz
F
220-240/1/50
E
RATED INPUT POWER
W 740 596
RATED RUNNING CURRENT
A 3.8 2.5
MOTOR OUTPUT
W 145 480
INDOOR CONDENSATE DRAIN SIZE mm/in
19.1 / 3/4
TYPE
PIPE
CONNECTION SIZE
LIQUID
GAS
mm/in
mm/in
FLARE VALVE
12.7 / ½
25.4 / 1
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.

Floor Standing Type - YFS-B Series (Cont’d)
MYSS72C MYSS80C
mm/in
mm/in
mm/in
m2 /ft2 mm/in
mm/in
mm/in
m2 /ft2 2 2
14 14
cm3 MODEL
INDOOR UNIT
OUTDOOR UNIT
YFS75B
COIL
MATERIAL COPPER TUBE
TUBE DIAMETER 9.53 / 0.375
THICKNESS 0.33 / 0.013
INDOOR
MATERIAL
THICKNESS
ALUMINIUM
0.115 / 0.0045
FIN
FACE AREA 0.465 / 5
ROW 4
FIN PER INCH 12
MATERIAL SEAMLESS INNER SMOOTH COPPER
TUBE DIAMETER 9.52 / 3/8
THICKNESS 0.28 / 0.011
OUTDOOR
MATERIAL
THICKNESS
ALUMINUM
0.11 / 0.004
FIN
FACE AREA 1.23 / 13.25
ROW
FIN PER INCH
COMPRESSOR
TYPE SCROLL
OIL TYPE SONTEX 200LT/ MINERAL OIL
OIL AMOUNT
/ fl.oz. 1240.0 / 44 3000.0 / 101
INSULATION GRADE
F E
OUTDOOR POWER SOURCE
V/Ph/Hz
380-415/3/50
CAPACITOR µF
NIL
RATED INPUT POWER
W 5800 7561
RATED RUNNING CURRENT
A 11.5 13.0
LOCKED ROTOR AMP.
A 97 102
AIR QUALITY
TYPE WASHABLE FILTERS
TREATMENT 70 % EFFICIENCY
INDOOR AIR FILTER
QUANTITY
LENGTH
pc
mm/in
1
900 / 35.43
SIZE WIDTH mm/in
550 / 21.65
THICKNESS mm/in
22 / 0.87
UNIT HEIGHT
UNIT & PACKING DIMENSIONS, UNIT WEIGHT
mm/in
1950 / 76.77
DIMENSION WIDTH mm/in
530 / 20.87
() - PANEL DEPTH mm/in
710 / 27.95
INDOOR PACKING HEIGHT mm/in
2080 / 81.89
DIMENSION WIDTH
() - PANEL DEPTH
mm/in
mm/in
550 / 21.65
950 / 37.40
UNIT WEIGHT kg/lb
142 / 33.05
UNIT
DIMENSION
HEIGHT
WIDTH
DEPTH
mm/in
mm/in
mm/in
946 / 37.2
1300 / 51.2
500 / 19.7
OUTDOOR
PACKING
DIMENSION
HEIGHT
WIDTH
DEPTH
mm/in
mm/in
mm/in
1132 / 44.56
1414 / 55.66
664 / 26.14
UNIT WEIGHT
kg/lb 145 / 320
CASING
MATERIAL ELECTRO-GALVANIZED MILD STEEL
INDOOR UNIT
FINISHING EPOXY POLYESTER POWER COATING
COLOUR
LIGHT GREY
OUTDOOR UNIT
MATERIAL
COLOUR
ELECTRO GALVANIZED MILD STEEL
LIGHT GREY
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.
TM-YFS-0410-A
6
®

®
TM-YFS-0410-A
7
Floor Standing Type - YFS-B Series
MODEL
INDOOR UNIT
OUTDOOR UNIT
YFS100B
MYSS100B
YFS125B
MYSS125B
TOTAL COOLING CAPACITY
Btu/h
W
101,000
29,593
125,000
36,625
TOTAL INPUT POWER
W 11,383 10,631
TOTAL RUNNING CURRENT - 3Φ
A 18.63 17.40
POWER SOURCE V/Ph/Hz
380-415 / 3 / 50
REFRIGERANT TYPE R-22
REFRIGERANT CONTROL (EXPANSION DEVICE) INDOOR TXV VALVE
FAN
HIGH
l/s / CFM 1759.7 / 3722 1942.2 / 4108
AIR FLOW MEDIUM
l/s / CFM 1418 / 3000 1702 / 3600
LOW
l/s / CFM 1180.1 / 2496 1519.5 / 3214
TYPE
CENTRIFUGAL
INDOOR
QUANTITY
MATERIAL
2
G2 GALVANIZED STEEL Z275
DRIVE DIRECT DRIVEN
DIAMETER
mm/in
241 / 9.49
LENGTH mm/in
241 / 9.49
SOUND PRESSURE LEVEL (H/M/L) dBA
78 / 75 / 73
AIR FLOW
l/s / CFM 2926 / 6200 2926 / 6200
TYPE PROPELLER
QUANTITY 1
OUTDOOR MATERIAL ALUMINUM
DRIVE DIRECT
DIAMETER mm/in
660 / 26
SOUND PRESSURE LEVEL
dBA 65 65
FAN MOTOR
TYPE 3-SPEEDS MOTOR
QUANTITY 2
INDEX OF PROTECTION (IP) IP 20
INSULATION GRADE
CLASS B
INDOOR POWER SOURCE V/Ph/Hz
220-240V / 1Ph / 50Hz
RATED INPUT POWER
W 810 881
RATED RUNNING CURRENT
A 3.4 3.7
MOTOR OUTPUT
W 315 600
POLES 4 POLES
TYPE PERMANENT SPLIT CAPACITOR
QUANTITY 1
INDEX OF PROTECTION (IP) IP54
OUTDOOR
INSULATION GRADE
POWER SOURCE V/Ph/Hz
F
380-415/3/50
F
RATED INPUT POWER
W 660 820
RATED RUNNING CURRENT
A 1.5 1.2
MOTOR OUTPUT
W 470 520
INDOOR CONDENSATE DRAIN SIZE mm/in
19.1 / 3/4
PIPE
CONNECTION
TYPE
SIZE
LIQUID
GAS
mm/in
mm/in
15.9 / 5/8
28.6 / 1 1/8
FLARE VALVE
15.9 / 5/8
34.9 / 1 3/8
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.

Floor Standing Type - YFS-B Series (Cont’d)
YFS100B
MYSS100B
YFS125B
MYSS125B
mm/in
mm/in
mm/in
m2 /ft2 0.836 / 9 0.883 / 9.5
mm/in
mm/in
mm/in
m2 /ft2 1.76 / 19.00 1.76 / 19.00
2 2
12 16
cm3 MODEL
INDOOR UNIT
OUTDOOR UNIT
COIL
MATERIAL COPPER TUBE
TUBE DIAMETER
9.53 / 0.375
THICKNESS 0.33 / 0.013
INDOOR
MATERIAL
THICKNESS
ALUMINIUM
0.115 / 0.0045
FIN
FACE AREA
ROW
3
FIN PER INCH 12
MATERIAL SEAMLESS INNER SMOOTH COPPER
TUBE DIAMETER 9.52 / 3/8
THICKNESS
0.28 / 0.011
OUTDOOR
MATERIAL
THICKNESS
ALUMINUM
0.11 / 0.004
FIN
FACE AREA
ROW
FIN PER INCH
COMPRESSOR
TYPE SCROLL
OIL TYPE SONTEX 200LT/ MINERAL OIL
OIL AMOUNT
/ fl.oz. 3253.1 / 110 3253.1 / 110
INSULATION GRADE F
OUTDOOR POWER SOURCE
V/Ph/Hz
380-415/3/50
CAPACITOR µF
NIL
RATED INPUT POWER
W 8607 9172
RATED RUNNING CURRENT
A 16.0 15.0
LOCKED ROTOR AMP.
A 125 110
AIR QUALITY
TYPE WASHABLE FILTERS
TREATMENT 70 % EFFICIENCY
INDOOR AIR FILTER
QUANTITY
LENGTH
pc
mm/in
2
478 / 21.65
SIZE WIDTH mm/in
900 / 35.43
THICKNESS mm/in
22 / 0.87
UNIT HEIGHT
UNIT & PACKING DIMENSIONS, UNIT WEIGHT
mm/in
1950 / 76.77
DIMENSION WIDTH mm/in
530 / 20.87
() - PANEL DEPTH mm/in
1180 / 46.46
INDOOR PACKING HEIGHT mm/in
2080 / 81.89
DIMENSION WIDTH mm/in
550 / 21.65
() - PANEL DEPTH mm/in
1370 / 53.94
UNIT WEIGHT kg/lb
190 / 418.87
UNIT
DIMENSION
HEIGHT
WIDTH
DEPTH
mm/in
mm/in
mm/in
946 / 37.2
1116 / 43.9
939 / 37.0
946 / 37.2
1116 / 43.9
939 / 37.0
OUTDOOR
PACKING
DIMENSION
HEIGHT
WIDTH
DEPTH
mm/in
mm/in
mm/in
1132 / 44.6
1282 / 50.5
1112 / 43.8
1132 / 44.6
1282 / 50.5
1112 / 43.8
UNIT WEIGHT
kg/lb 164 / 361 224 / 493
CASING
MATERIAL ELECTRO-GALVANIZED MILD STEEL
INDOOR UNIT
FINISHING EPOXY POLYESTER POWER COATING
COLOUR
LIGHT GREY
OUTDOOR UNIT
MATERIAL
COLOUR
ELECTRO GALVANIZED MILD STEEL
LIGHT GREY
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.
TM-YFS-0410-A
8
®

®
TM-YFS-0410-A
9
Floor Standing Type - YFS-B Series
MODEL
TOTAL COOLING CAPACITY
INDOOR
OUTDOOR
HIGH
AIR FLOW MEDIUM
LOW
TYPE
QUANTITY
MATERIAL
DRIVE
DIAMETER
LENGTH
SOUND PRESSURE LEVEL (H/M/L)
AIR FLOW
TYPE
QUANTITY
MATERIAL
DRIVE
DIAMETER
SOUND PRESSURE LEVEL
TYPE
QUANTITY
INDEX OF PROTECTION (IP)
INSULATION GRADE
INDOOR POWER SOURCE
RATED INPUT POWER
RATED RUNNING CURRENT
MOTOR OUTPUT
POLES
TYPE
QUANTITY
INDEX OF PROTECTION (IP)
INSULATION GRADE
OUTDOOR
POWER SOURCE
RATED INPUT POWER
RATED RUNNING CURRENT
MOTOR OUTPUT
INDOOR CONDENSATE DRAIN SIZE
TYPE
PIPE
LIQUID
CONNECTION SIZE
GAS
INDOOR UNIT
OUTDOOR UNIT
TOTAL INPUT POWER
TOTAL RUNNING CURRENT - 3Φ
POWER SOURCE
REFRIGERANT TYPE
REFRIGERANT CONTROL (EXPANSION DEVICE)
Btu/h
W
W
A
V/Ph/Hz
l/s / CFM
l/s / CFM
l/s / CFM
mm/in
mm/in
dBA
l/s / CFM
mm/in
dBA
V/Ph/Hz
W
A
W
V/Ph/Hz
W
A
W
mm/in
mm/in
mm/in
FAN
FAN MOTOR
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.
YFS150B
MYSS150C
153,000
44,829
15,745
25.77
380-415 / 3 / 50
R-22
INDOOR TXV VALVE
2160 / 4569
1891 / 4000
1700 / 3695
CENTRIFUGAL
2
G2 GALVANIZED STEEL Z275
DIRECT DRIVEN
270 / 10.63
270 / 10.63
78 / 75 / 73
4720 / 10000
PROPELLER
1
ALUMINUM
DIRECT
762 / 30
73
3-SPEEDS MOTOR
2
IP 20
CLASS B
220-240V / 1Ph / 50Hz
1120
4.7
600
4 POLES
INDUCTION
1
IP54
F
380-415 / 3 / 50
820
1.2
520
19.1 / 3/4
FLARE VALVE
15.9 / 5/8
34.9 / 1 3/8

Floor Standing Type - YFS-B Series (Cont’d)
mm/in
mm/in
mm/in
m2 /ft2 mm/in
mm/in
mm/in
m2 /ft2 cm3 MODEL
INDOOR UNIT
OUTDOOR UNIT
YFS150B
MYSS150C
COIL
MATERIAL
COPPER TUBE
TUBE DIAMETER
9.53 / 0.375
THICKNESS
0.33 / 0.013
INDOOR
MATERIAL
THICKNESS
ALUMINIUM
0.115 / 0.0045
FIN
FACE AREA
0.883 / 9.5
ROW
4
FIN PER INCH
12
MATERIAL
SEAMLESS INNER SMOOTH COPPER
TUBE DIAMETER
9.52 / 3/8
THICKNESS
0.28 / 0.011
OUTDOOR
MATERIAL
THICKNESS
ALUMINUM
0.11 / 0.004
FIN
FACE AREA
1.24 / 13.38
ROW
2
FIN PER INCH
14
COMPRESSOR
TYPE
SCROLL
OIL TYPE
SONTEX 200LT/ MINERAL OIL
OIL AMOUNT
/ fl.oz.
2513.8 / 85
INSULATION GRADE
F
OUTDOOR POWER SOURCE
V/Ph/Hz
380-415/3/50
CAPACITOR
µF
NIL
RATED INPUT POWER
W
12502
RATED RUNNING CURRENT
A
23.0
LOCKED ROTOR AMP.
A
AIR QUALITY
198
TYPE
WASHABLE FILTERS
TREATMENT
70 % EFFICIENCY
INDOOR AIR FILTER
QUANTITY
LENGTH
pc
mm/in
2
478 / 21.65
SIZE WIDTH mm/in
900 / 35.43
THICKNESS mm/in
22 / 0.87
UNIT HEIGHT
UNIT & PACKING DIMENSIONS, UNIT WEIGHT
mm/in
1950 (76.77)
DIMENSION WIDTH
mm/in
530 (20.87)
() - PANEL DEPTH
mm/in
1180 (46.46)
INDOOR PACKING HEIGHT
mm/in
2080 (81.89)
DIMENSION WIDTH
mm/in
550 (21.65)
() - PANEL DEPTH
mm/in
1370 (53.94)
UNIT WEIGHT
kg/lb
200 / 440.92
UNIT
DIMENSION
HEIGHT
WIDTH
DEPTH
mm/in
mm/in
mm/in
1041 / 41.0
1116 / 43.9
939 / 37.0
OUTDOOR
HEIGHT
PACKING
WIDTH
DIMENSION
DEPTH
mm/in
mm/in
mm/in
1132 / 44.6
1282 / 50.5
1112 / 43.8
UNIT WEIGHT
kg/lb
258 / 568
CASING
MATERIAL
ELECTRO-GALVANIZED MILD STEEL
INDOOR UNIT
FINISHING
EPOXY POLYESTER POWER COATING
COLOUR
LIGHT GREY
OUTDOOR UNIT
MATERIAL
COLOUR
ELECTRO GALVANIZED MILD STEEL
LIGHT GREY
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240.
3) NOMINAL COOLING CAPACITY ARE BASED ON THE CONDITIONS BELOW:
COOLING - 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB / 23.9°C WB OUTDOOR
4) EER CALCULATION IS BASED ON EFFECTIVE POWER INPUT AS PER ARI 210/240.
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Safety Device
MODEL
SAFETY DEVICE
MODEL
SAFETY DEVICE
MODEL
SAFETY DEVICE
MODEL
SAFETY DEVICE
INDOOR UNIT
OUTDOOR UNIT
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
PHASE SEQUENCER, 1Φ
DISCHARGE THERMOSTAT SETTING
INDOOR UNIT
OUTDOOR UNIT
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
PHASE SEQUENCER
DISCHARGE THERMOSTAT SETTING
INDOOR UNIT
OUTDOOR UNIT
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
PHASE SEQUENCER
DISCHARGE THERMOSTAT SETTING
INDOOR UNIT
OUTDOOR UNIT
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
PHASE SEQUENCER
DISCHARGE THERMOSTAT SETTING
YFS50B YFS60B
YSL50D YSL61D
TYPE
NC NC
OPEN kPa / psi 2937 / 426 2937 / 426
CLOSE kPa / psi 2413 / 350 2413 / 350
TYPE
NC NC
OPEN kPa / psi 124 / 18 124 / 18
CLOSE kPa / psi 193 / 28 193 / 28
°C / °F
YFS75B
MYSS72C MYSS80C
TYPE
AUTO RESET AUTO RESET
OPEN Pa / psi 2937 / 426 2937 / 426
CLOSE Pa / psi 2413 / 350 2413 / 350
TYPE
AUTO RESET AUTO RESET
OPEN Pa / psi 124 / 18 124 / 18
CLOSE Pa / psi 193 / 28 193 / 28
OYLT OYLT
°C / °F 125 / 257 125 / 257
YFS100B YFS125B
MYSS100B MYSS125B
TYPE
AUTO RESET AUTO RESET
OPEN Pa / psi 2937 / 426 2937 / 426
CLOSE Pa / psi 2413 / 350 2413 / 350
TYPE
AUTO RESET AUTO RESET
OPEN Pa / psi 124 / 18 124 / 18
CLOSE Pa / psi 193 / 28 193 / 28
OYLT OYLT
°C / °F 125 / 257 125 / 257
TYPE
OPEN Pa / psi
CLOSE
TYPE
Pa / psi
OPEN Pa / psi
CLOSE Pa / psi
°C / °F
YFS150B
MYSS150C
AUTO RESET
2937 / 426
2413 / 350
AUTO RESET
124 / 18
193 / 28
OYLT
125 / 257

Control Panel
8
9
2
5
4. Application Information
TEMP
TIMER
AUTO
HIGH
MED
LOW
SENSOR
FAN
SWING
COOL
DRY
HEAT
FAN
ON/OFF
MODE
SLEEP
1. “ON/OFF” switch 6. “Sleep” mode
• Press to start the air conditioner unit. • Press button to activate the sleep
• Press again to stop the unit. function can only be activated under
“cool” mode operation.
2. Temperature setting The set temperature will increase 0.5°C
• Set the desired room temperature.
after 30 minutes, 1°C after 1 hour and 2°C
• Press button to increase or decrease the
set temperature. Setting range are between
after 2 hours.
16°C to 30°C (60°F to 80°F).
7. Air Swing
3. Operation Modes
• Press the “mode” button for select the type
• Press button to activate the automatic air
swing function.
of operating mode.
COOL, DRY, FAN
8. Sensor
• Infra red sensor to receive signals from
wireless controller.
4. Fan Speed selection. 9. LED Display
• Press the button until the desired fan speed • To display the set temperature (in °C) and
is achieved. timer delay setting (in hours).
5. Timer. 10. Transmission source
• Press the set button to select the switch • To transmit signals to the air conditioner.
timer of the air conditioner unit (the setting
range is between 1 to 10 hours).
4
1
3
6
7
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Operating State And Fault Table
Wireless Remote Control (Universal Board)
Cooling : LED Indicator Light Display
POWER TIMER SLEEP
POWER TIMER
1 Time
2 Times
3 Times
1 Time
3 Times
SLEEP
ON / ON or OFF BLINKING
Operation / Faulty Indication
Cool Mode
Timer On
Sleep Mode On
Compressor Overload
Gas Leak
Room Sensor Open or Short
Indoor Coil Sensor Open or Short
Outdoor Coil Sensor Open or Short

c) Ensure that the location is convenient for wiring and piping.
5. Installations
Indoor Unit
Preliminary Site Survey
a) Electrical supply and installation is to confirm to local authority’s (e.g. National Electricity Board)
codes and regulations.
b) Voltage supply fluctuation must not exceed +/- 10% of rated voltage. Electricity supply line must be
independent of welding transformers which can cause supply fluctuation.
c) Ensure that the location is convenient for wiring and piping.
Pipings
Do not use contaminated or damaged copper tubings. If pipings, evaporator or condenser are exposed
or had been opened for 15 seconds or more, vacuum and purge with field supplied refrigerant. Generally,
do not remove plastic/rubber plugs/caps from fittings, tubings and coils until ready to connect
suction or liquid line into fittings.
Operational Check
After all electrical wiring is completed and the system is charged with refrigerant, make sure unit is
operating properly. Check that:
a) Condenser fans are running, with warm air blowing off the condenser coil.
b) Evaporator blowers are running and discharging cool air.
c) Suction line inside condensing unit feels cool.
d) Liquid line inside condensing unit feels warm.
Electrical Connection
As wiring regulations differ from country to country, please refer to your LOCAL ELECTRICAL CODES for
field wiring regulations and ensure that these are complied with. Besides, observe the following general
precautions:
a) Ensure that the rated voltage of the unit corresponds to that of the name plate before commencing
wiringwork.
b) Provide a power outlet to be used exclusively for each unit. A power supply disconnect and a circuit
breaker for over-current protection should be provided in the exclusive line.
c) The unit must be GROUNDED to prevent possible hazard due to insulation failure.
d) All wiring must be firmly connected.
e) Electrical wiring must not touch the refrigerant piping, compressor and any moving parts of the fan
motors.
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Outdoor Unit
Location For Installation Of The Condensing Units
As condensing temperature rises, evaporating temperature rises and cooling capacity drops. In order to achieve
maximum cooling capacity, the location selected should fulfill the following requirements:-
a) Install the condensing (outdoor) unit in a way such that hot air distributed by the outdoor condensing unit
cannot be drawn in again (as in the case of short circuit of hot discharge air). Allow sufficient space for
maintenance around the unit.
b) Ensure that there is no obstruction of air flow into or out of the unit. Remove obstacle which block air intake or
discharge.
c) The location must be well ventilated, so that the unit can draw and distribute plenty of air thus lowering the
condensing temperature.
d) A place capable of bearing the weight of the outdoor unit and isolating noise and vibration.
e) A place protected from direct sunlight. Otherwise use an awning for protection, if necessary.
f) A place where the hot air discharge and operating sound level will not annoy the neighbours.
g) The location must not be susceptible to dust or oil mist.
CAUTION: If the condensing unit is operated in an atmosphere containing oils (including machine
oils), salt (coastal area), sulphide gas (near hot spring, oil refinery plant), such substances
may lead to failure of the unit.

Field Piping
To ensure satisfactory operation and performance, the following points should be noted for the field
piping arrangements of the complete refrigerant cycle.
a) Liquid loops or oil traps must be provided according to the position of the outdoor and the indoor units
(depending on whether the indoor unit is above or below the outdoor unit).
b) Field supplied filter dryer should be provided as close to the expansion valve(s) of the indoor unit
(evaporator) as possible.
c) Field supplied sight glass must be assembled and mounted next to filter dryer.
Maximum Pipe Length And Maximum Number Of Bends
When the pipe is too long, the required refrigerant quantity increases. Both the capacity and reliability
drops asa result. As the number of bends increases, system piping resistance to the refrigerant flow
increases, thus lowering the cooling capacity and the compressor may become defective. If the height
difference between the evaporator and the condenser is excessive, the cooling capacity drops, the
lubricating oil return is retarded, affecting the compressor efficiency adversely.
Always choose the shortest piping path and follow the recommendations as shown below :-
Model
Max. Elevation, m
(ft.)
Max. Total Length, m
(ft.)
MYSS 100/125B 25 (82.0) 45 (147.6) 8
MYSS 80/150C 25 (82.0) 45 (147.6) 8
Note : If piping is more than 100ft, it is recommended to add in an accumulator.
Max. of Bends
CAUTION:
1) Our guarantee on the performance of our air-conditioners is strictly revoked if the height,
length and/or the number of bends of the refrigerant piping system installed is beyond the
limit above.
2) Bendings must be carefully made so as not to crush the pipe. Use a pipe bender to bend a pipe
as far as possible.
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When a malfunction of the air conditioner unit is detected, immediately switch off the main power supply
before proceeding with the following troubleshooting procedures.
The following are common fault conditions and simple troubleshooting tips. If any other fault conditions which
are not listed occur, contact your nearest local dealer. DO NOT attempt to troubleshoot the unit by yourself.
No
Fault
onditions
1 The air conditioner unit will not resume after
power failure.
2 The compressor does not operate 3 minutes
after the air conditioner unit is started.
3 The airflow is too slow or room cannot be
cooled sufficiently.
c
Possib
le
causes
/ corrective
a
ctions
• The auto restart function is not functioning. Please
turn on the unit with the wireless / wired controller.
• Protection against frequent starting.
• Wait for 3 or 4 minutes for the compressor to start
operating by it self.
• The air filter is dirty.
• The doors and windows are opened.
• The air suction and discharge of both indoor and
outdoor units are clogged or blocked.
• The regulated temperature or temperature setting
is not low enough.
4 Discharge airflow has bad odor. • Cigarettes, smoke particles, perfume and others,
which might have adhered onto the coil, may
cause odor.
• Contact your nearest dealer.
5 Condensation on the front air grille of the indoor
unit.
• This is caused by air humidity after an extended
period of operation.
• The set temperature is too low. Increase the
temperature setting and operate the unit at high
fan speed.
6 Water flowing out from the air conditioner. • Switch off the unit and contact your nearest
dealer. This might be due to tilted installation.
7 Hissing airflow sound from the air conditioner
unit during operation.
• Liquid refrigerant flowing into the evaporator coil.
8 The wireless controller display is dim. • The batteries are discharged.
• The batteries are not correctly inserted.
• The assembly is not good.
9 Compressor operates continuously. • Dirty air filter. Clean the air filter.
• Temperature setting too low (cooling). Use higher
temperature setting.
10 No cool air comes out during cooling cycle. • Temperature setting too high (cooling). Use lower
temperature setting.

Guidelines Of Field-charging Air Conditioning Systems With Scroll Compressors
These guidelines are intended for use with Scroll compressors only with R22, R407C, R134a, R404A,
R507,and R410A refrigerants. They do not apply to reciprocating compressors or competitive Scroll
compressors.
Field -Charging - Some Precaution Points
Scroll compressors have a very high volumetric efficiency and quickly pump a deep vacuum if there is
insufficient refrigerant in the system or if refrigerant is added too slowly. Operation with low suction
pressure will quickly lead to very high discharge temperatures. While this process is happening, the
scrolls are not being well lubricated - scrolls depend on the oil mist in the refrigerant for lubrication. A
lack of lubrication leads to high friction between the scroll flanks and tips and generates additional heat.
The combination of heat of compression and heat from increased friction is concentrated in a small
localized discharge area where temperature scan quickly rise to more than 300°C. These extreme
temperatures damage the Scroll spirals and the orbiting Scroll bearing. This damage can occur in less
than one minute especially on larger compressors. Failure may occur in the first few hours or the
damage done during field charging may show up some time later. Other typical field charging problems
include undercharging, overcharging, moisture or air in the system etc. In time each one of these problems
can cause compressor failure.
Equipment
Minimal equipment is required for field charging. The minimum equipment required to do a satisfactory
job is:-
Set of service gauges
Hoses
Vacuum pump
Vacuum gauge
ScalesThermometer
Charging Hoses
Most field-charging is done using standard service hoses. Hoses are made in different colors with
different working pressures and with different leak rates but the most important point is the presence
or absence of Shredder valve depressors. Shredder valve depressors severely restrict the flow through
the service hoses.This slows evacuation and vapor charging dramatically. In most cases the Shredder
depressor can be removed but it is simpler to have one set of hoses with and one set without Shredder
depressors.
Hose with Shredder valve Depressor Hose without Shredder valve Depressor
Hose selection is important depending whether the system is being evacuated or charged. Charging
liquid from the cylinder into the liquid line should be carried out using an open hose connected to an
unrestricted fitting. This will reduce charging time.
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Typical service valves
found on the outdoor unit
Shredder core
Shredder valve with
core in place
Compressor Range Model lbs. kg.
Quest ZR46 to ZR81 10 4.5
Summit ZR84 to ZR144 16 7.3
Specter ZR90 to ZR19M 17 7.7
Shredder valves
Most split systems have a suitable connection on the outdoor unit
Shredder valve with core removed
Shredder valves provide easy system access for pressure reading and addition of refrigerant. On
small systems, they provide a reasonable connection for evacuation also. However, Shredder valves
and the hoses connected to them can cause very severe pressure drops and can multiply evacuation
time by a factor of 4 or 5. On the positive side, Shredder valves provide a restriction that slows the
speed of liquid charging into the suction side. When a pressure drop is desirable (charging liquid into
suction), connect via a Shredder valve. When a pressure drop is detrimental (evacuation), connect via
an open fitting.
How Much Refrigerant ?
The proper refrigerant charge should follow the volume as recommended by manufacturer and recommendation
should be followed by the installer. Refer to the table of Refrigerant Charge Level.
If the installer cannot find the correct charge but the system must be started, refrigerant should be
carefully added to the system until reasonable sub-cooling is measured in the liquid line and reasonable
suction super-heat is measured at the compressor suction. Suction and discharge pressures
must be monitored carefully during the charging process.
Charge Limits
Copeland Scroll compressors have the different charge limits for different compressor models as shown
in table below. If the total charge exceeds these limits, the system should have a crank case heater
and/or pump downcycle and/or accumulator to prevent liquid damage to the compressor. Some
systems may require accumulators to limit liquid flood back even though the charge is lower than the
published limit.

Charging Recommendations
Charging liquid in a CONTROLLED manner into the suction side until the system is full .This recommendation
does not hold true for reciprocating compressors where liquid charging into the suction side could cause
severe damage.
Charging Cylinder on Scale Close-up of Scale
Carefully monitor the suction and discharge pressures - ensure that the suction pressure does not fall below 25
psig (1.7 bar) at any time during the charging process.
CAUTION : Manifold Gauge will show cylinder pressure rather than suction pressure if the cylinder valve and
Manifold valve "A" are both open.
Charging Procedures - Three phase compressors
There are many ways of charging liquid in a "controlled manner" into the
suction side:-
1. Use valve A on the manifold gauge set
2. Use the valve on the refrigerant cylinder
3. Charge through a Shredder valve
4. Use a hose with a Shredder valve depressor
5. Charge into the suction side at some distance from the compressor.
6. All of the above
A
The fundamental procedure is the same as for single phase models but the compressor can run in the wrong
direction on starting. If this happens reverse any two phases and start again. Short term reverse rotation will
not damage the compressor.
As compressors get larger the importance of correct field charging procedures grows exponentially. Unfortunately
larger systems are often field charged which leads to many infant failures. All Specter compressors
have internal discharge temperature protectors which are very effective in preventing dangerously high
discharge temperatures during charging. The protection module will trip and lock the compressor out for 30
minutes. It is not normally necessary to wait 30 minutes for the module to reset. When the compressor has
cooled down the module can be reset by breaking the power supply to the control circuit. Very often the
serviceman does not understand why the module tripped and uses a jumper wire to bypass it. He continues
to charge the system and removes the jumper when charging is complete. The compressor may or may not
run with the protector back in the circuit but it is certain that the compressor has been damaged and premature
failure is inevitable.
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Model : YFS 50/60/75B
6. Wiring Diagrams
L N
E

Model : YFS 100/125/150B
L
N
E
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Model : YSF 50/60B - YSL 50/61D
Indoor Unit

Model : YFS 75B - MYSS 72/80C
Indoor Unit
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Model : YFS 100B - MYSS 100B
Indoor Unit

Model : YFS 125B - MYSS 125B, YFS 150B - MYSS 150B
Indoor Unit
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7. Servicing and Maintenance
The design concept of the Condensing Unit is such that all servicing can be done from the front and
side of the unit.
Upon removal of front and side panel, all the electrical “terminal box”, fan and motor assembly and
compressor are easily accessible.
Under normal circumstances, these outdoor units only require a check and cleaning of air intake
coil surfaces once quarterly. However, if a unit is installed in area subjected to much oil, mist and dust
, the coil must be regularly cleaned by qualified Air Conditioner Service Technicians to ensure
sufficient heat exchange and proper operation. Otherwise, the systems life span might be shortened.
CAUTION
When the compressor is to be stopped for a long time, the crankcase heater should be energized
for at least 6 hours before start of operation.
Do not charge OXYGEN, ACETYLENE or other flammable and poisonous gases into the
refrigeration cycle when performing a leakage test or an airtight test. These types of gases are
extremely dangerous, because explosion can occur.
It is recommended that nitrogen or refrigerant be charged for these types of tests.
Caution For Use
Bear the following points in mind to safeguard against malfunction and breakdown.
Do not stick rods or other objects through the air outlet during operation since this may result to
damage or injury
The air conditioner must not re-start within 3 minutes after shutdown. (These models are equipped
with a crankcase heater with the compressor).
Make sure the air conditioner is properly grounded by checking the ground terminal.
Maintenance
For superb performance and lasting durability, please do not forget to conduct proper and regular
maintenance.
Cleaning The Outdoor Unit Heat Exchanger
If you use your air conditioner for prolonged period of time, the outdoor unit heat exchanger will
become dirty impairing its function and reducing the performance of the air conditioned. Consult your
local dealer about the cleaning of the heat exchanger.

8. Troubleshooting
When a malfunction of the air conditioner unit is detected, immediately switch off the main power supply
before proceeding with the following troubleshooting procedures.
The following are common fault conditions and simple troubleshooting tips. If any other fault conditions which
are not listed occur, contact your nearest local dealer. DO NOT attempt to troubleshoot the unit by yourself.
No
Fault
cond
itio
ns
1 The air conditioner unit will not resume after
power failure.
2 The compressor does not operate 3 minutes
after the air conditioner unit is started.
3 The airflow is too slow or room cannot be
cooled sufficiently.
Possi
ble
causes
/ corr
ectiv
e actio
ns
• The auto restart function is not functioning. Please
turn on the unit with the wireless / wired controller.
• Protection against frequent starting.
• Wait for 3 or 4 minutes for the compressor to start
operating by it self.
• The air filter is dirty.
• The doors and windows are opened.
• The air suction and discharge of both indoor and
outdoor units are clogged or blocked.
• The regulated temperature or temperature setting
is not low enough.
4 Discharge airflow has bad odor. • Cigarettes, smoke particles, perfume and others,
which might have adhered onto the coil, may
cause odor.
• Contact your nearest dealer.
5 Condensation on the front air grille of the indoor
unit.
• This is caused by air humidity after an extended
period of operation.
• The set temperature is too low. Increase the
temperature setting and operate the unit at high
fan speed.
6 Water flowing out from the air conditioner. • Switch off the unit and contact your nearest
dealer. This might be due to tilted installation.
7 Hissing airflow sound from the air conditioner
unit during operation.
• Liquid refrigerant flowing into the evaporator coil.
8 The wireless controller display is dim. • The batteries are discharged.
• The batteries are not correctly inserted.
• The assembly is not good.
9 Compressor operates continuously. • Dirty air filter. Clean the air filter.
• Temperature setting too low (cooling). Use higher
temperature setting.
10 No cool air comes out during cooling cycle. • Temperature setting too high (cooling). Use lower
temperature setting.
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Diagnostic Guidelines
By means of pressure reading :
Circuit
High side
Low side
High side
Low side
Data
Too low
High side
Low side ●
●
A little low
Pressure
Normal
A little high
High side
Low side ●
High side
Low side
●
●
Too high
●
●
●
Probable cause
1. Overcharged with refrigerant.
2. Non-condensable gases in refrigerant circuit (e.g. air)
3. Obstructed air-intake / discharge.
4. Hot air short circuiting in outdoor unit.
1. Poor compression / no compression (compressor
defective)
2. Reversing valve leaking.
1. Undercharged with refrigerant.
2. Refrigerant leakage.
3. Air filter clogged / dirty (indoor unit).
4. Indoor fan locked / seized.
● 1. Outdoor fan blocked (cooling).
2. Outdoor coil dirty (cooling).
3. Non-condensable gases in refrigerant circuit (e.g. air)
●
1. Air intake temperature of indoor unit too high.

By means of diagnostic flow chart:
Generally, there are two kinds of problems, i.e. starting failure and insufficient cooling. “Starting
failure” is caused by electrical defect while improper application or defects in refrigerant circuit causes
“Insufficient cooling ”.
i) Diagnosis of Electric Circuit
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ii ) Diagnosis of Refrigerant Circuit / Application
There might be some causes where the unit starts running but does not perform satisfactorily, i.e.
insufficient cooling. Judgement could be made by measuring temperature difference of indoor unit’s
intake and discharge air as well as running current.

Indoor Unit
Model : YFS 50/60/75B
MODELS
50B
60B
75B
9. Dimensional Data
A B C
DIMENSION
D E Liquid Suction
203 304 203 266 209 3/8” 7/8”
203 304 203 266 209 1/2” 7/8”
186 338 186 292 220 1/1” 1-1/8”
Model : YFS 100/125/150B
MODELS
100B
125B
150B
A B C
DIMENSION
D Liquid Suction
304 260 266 209 5/8” 1-1/8”
304 260 266 209 3/4” 1-1/8”
338 192 292 220 5/8” 1-3/8”
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Outdoor Unit
Model : YSL 50D
Model : YSL 61D
All Dimensions are in mm
All Dimensions are in mm

Model : MYSS 72/80C
Model : MYSS 100/125B (Standard Vertical Air Discharge)
Dimension in mm
Dimension in mm
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Model : MYSS 100/125B
Dimension in mm
Model : MYSS 150C (Standard Vertical Discharge / Non-convertible)
Dimension in mm

Indoor Unit
Model : YFS 50/60B
10. Exploded View & Part List
NO. DESCRIPTION NO. DESCRIPTION
1 PAINT PANEL BASE YFS 50-75 13 BAFFLE COIL L/R YFS 50-100
2 PAINT BASE FIXTURE L/R YFS 50-150 14 FILTER RAIL TOP YFS 50-75
3 INSUL. PANEL DISCH YFS 50-60 15 FILTER FRAME BTM YFS 50-75
4 INSUL. PANEL TOP YFS 50-75 16 INSUL. DRAIN PAN YFS 50-75
5 INSUL. PANEL VERT L/R FRONT L/R 50/75 17 CHANNEL WELD PANEL GRILL YFS 50-150
6 INSUL. PANEL VERT L/R BACK YFS 50-75 18 ASSY COIL AL, 187PC,3R,12FPI YFS 50-60
7 INSUL. PANEL BACK YFS 50-75 19 BLOWER, DD241-241-200C C/W 10UF (AP/9x9)
8 INSUL. PANEL SIDE YFS 50-150 20 FILTER, 550 x 900 x 22, 70-75% APR YFS 50-75
9 INSUL. PANEL HEADER YFS 50/60/100/125 21 FAN VANE
10 INSUL. PANEL FRONT TOP YFS 50-75 22 CONTROL BOX
11 PAINT GRILLE YFS 50-75 23 CONTROL BOX COVER
12 PAINT FLANGE DISCH YFS 5/60/100/125 24 CONTROLLER, C3D-SLM EC(10m) YORK 1M
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Model : YFS 100B
NO. DESCRIPTION NO. DESCRIPTION
1 PAINT PANEL BASE YFS 100-150 13 BAFFLE COIL L/R YFS 50-100
2 PAINT BASE FIXTURE L/R YFS 50-150 14 FILTER RAIL TOP YFS 100
3 INSUL. PANEL DISCH YFS 100-125 15 FILTER FRAME BTM YFS 100-150
4 INSUL. PANEL TOP YFS 100-150 16 INSUL. DRAIN PAN YFS 100-150
5 INSUL. PANEL VERT L/R FRONT L/R 100/150 17 CHANNEL WELD PANEL GRILL YFS 50-150
6 INSUL. PANEL VERT L/R BACK YFS 100-150 18 ASSY COIL AL, 12 TPC,3R,12FPI YFS 100
7a INSUL. PANEL BACK TOP YFS 100-150 19 BLOWER, DD241-241-200C C/W 10UF (AP/9x9)
7b INSUL. PANEL BACK BTM YFS 100-150 20 FILTER, 478 x 900 x 22, 70-75% APR
8 INSUL. PANEL SIDE YFS 50-150
9 INSUL. PANEL HEADER YFS 50/60/100/125
10 INSUL. PANEL FRONT TOP YFS 100-150
11 PAINT GRILLE YFS 100-150
12 PAINT FLANGE DISCH YFS 5/60/100/125
21 FAN VANE
22 CONTROL BOX
23 CONTROL BOX COVER
24 CONTROLLER, C3D-SLM EC(10m) YORK 1M

Model : YFS 125B
NO. DESCRIPTION NO. DESCRIPTION
1 PAINT PANEL BASE YFS 100-150 13 BAFFLE COIL L/R YFS 125-150
2 PAINT BASE FIXTURE L/R YFS 50-150 14 FILTER RAIL TOP YFS 125-150
3 INSUL. PANEL DISCH YFS 100-125 15 FILTER FRAME BTM YFS 100-150
4 INSUL. PANEL TOP YFS 100-150 16 INSUL. DRAIN PAN YFS 100-150
5 INSUL. PANEL VERT L/R FRONT L/R 100/150 17 CHANNEL WELD PANEL GRILL YFS 50-150
6 INSUL. PANEL VERT L/R BACK YFS 100-150 18 ASSY COIL AL, 8 TPC,3R,12FPI YFS 125
7a INSUL. PANEL BACK TOP YFS 100-150 19 BLOWER, DD241-241-200C C/W 10UF (AP/9x9)
7b INSUL. PANEL BACK BTM YFS 100-150 20 FILTER, 478 x 900 x 22, 70-75% APR
8 INSUL. PANEL SIDE YFS 50-150
9 INSUL. PANEL HEADER YFS 50/60/100/125
10 INSUL. PANEL FRONT TOP YFS 100-150
11 PAINT GRILLE YFS 100-150
12 PAINT FLANGE DISCH YFS 5/60/100/125
21 FAN VANE
22 CONTROL BOX
23 CONTROL BOX COVER
24 CONTROLLER, C3D-SLM EC(10m) YORK 1M
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TM-YFS-0410-A
Model : YFS 150B
NO. DESCRIPTION NO. DESCRIPTION
1 PAINT PANEL BASE YFS 100-150 13 BAFFLE COIL L/R YFS 125-150
2 PAINT BASE FIXTURE L/R YFS 50-150 14 FILTER RAIL TOP YFS 125-150
3 INSUL. PANEL DISCH YFS 150 15 FILTER FRAME BTM YFS 125-150
4 INSUL. PANEL TOP YFS 100-150 16 INSUL. DRAIN PAN YFS 125-150
5 INSUL. PANEL VERT L/R FRONT L/R 100/150 17 CHANNEL WELD PANEL GRILL YFS 50-150
6 INSUL. PANEL VERT L/R BACK YFS 100-150 18 ASSY COIL AL, 10TPC,4R,12FPI YFS 150
7a INSUL. PANEL BACK TOP YFS 100-150 19 BLOWER, DD241-241-200C C/W 10UF (AP/9x9)
7b INSUL. PANEL BACK BTM YFS 100-150 20 FILTER, 478 x 900 x 22, 70-75% APR
8 INSUL. PANEL SIDE YFS 50-150
9 INSUL. PANEL HEADER YFS 150
10 INSUL. PANEL FRONT TOP YFS 100-150
11 PAINT GRILLE YFS 100-150
12 PAINT FLANGE DISCH YFS 75-150
21 FAN VANE YFS 50-150
22 CONTROL BOX YFS 50-150
23 CONTROL BOX COVER 50-150
24 CONTROLLER, C3D-SLM EC(10m) YORK 1M

Outdoor Unit
Model : MYSS 72/80C
NO. DESCRIPTION NO. DESCRIPTION
1 ASSY, BASE PAN 19 CAP FOR FAN BLADE
2 ASSY, COIL 20 GUARD, FAN
3 STRUCTURE FRONT LEFT 21 PANEL, TOP
4 ASSY, PARTITION 22 PANEL, SERVICE
5 ASSY, COMPRESSOR 23 SCREW, TRUSSD HEAD PHILIP
6 PLATE, VALVE 24 SCREW, TRUSSD HEAD PHILIP
7 ASSY, ACCESS VALVE 1/4" 25 SCREW, TRUSSD HEAD PHILIP
8 CLAMP, LIQUID TUBE 3/4" 26 SCREW, SELF TAPPING
9 CLAMP, SUCTION TUBE 1" 35 SCREW, WOOD
10 ASSY, TUBING 37 WASHER
11 STRUCTURE, FRONT RIGHT 38 WASHER, SPRING
12 STRUCTURE, BACK RIGHT 39 NUT HEXAGON
13 ASSY, TERMINAL BOARD MAIN 40 WASHER, ISOLATOR
14 PLATE, ORIFICE SUPPORT 41 WASHER
15 PLATE, ORIFICE 42 WASHER, SPRING
16 BRACKET FAN MOTOR 43 NUT, HEXAGON
17 MOTOR 44 ISOLATOR, DURO 40
18 BLADE, FAN 45 ISOLATOR SLEEVE
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TM-YFS-0410-A
Model : MYSS 100/125B
NO. DESCRIPTION NO. DESCRIPTION
1 ASSY, BASE PAN 17 MOTOR
2 COMPRESSOR 18 PROPELLER FAN
MYSS100B 19 FAN GUARD
MYSS125B 20 COVER, TER. BOARD FRONT
3 ASSY, STRUC. BACK L 21 HOISTING BRACKET
4 ASSY, STRUC. BACK R 22 STRUC. TUBE SUPT.
5 SUPT, ORIFICE PLATE MYSS100B
6 ASSY, COIL L MYSS125B
MYSS100B 23 SUPT, TUBE GAS
MYSS125B MYSS100B
7 ASSY, COIL R MYSS125B
MYSS100B 24 CLAMP, TUBE GAS
MYSS125B MYSS100B
8 STRUC, FRONT L MYSS125B
9 STRUC, FRONT R 25 SUPT, TUBE LIQUID
10 STRUC, TOP L 26 CLAMP, TUBE LIQUID
11 STRUC, TOP R 27 ASSY, ACCESS VALVE
12 T/B PANEL PARTS NOT IN DIAGRAM
13 COVER, TER. BOARD BACK PRESS SWITCH, 18PSI
14 PANEL, TOP FRONT PRESS SWITCH, 426PSI
15 ORIFICE PLATE MAGNECTIC CONTACTOR
16 BRACKET, FAN MOTOR PHASE PROTECTOR PP1.03

Model : MYSS 150C
NO. DESCRIPTION NO. DESCRIPTION
1 ASSY, BASE PAN 14 TER. BOX COVER
2 COMPRESSOR 15 PANEL, ORIFICE
3 STRUC, PIPE SUPT. 16 FAN MOTOR BRACKET
4 ASSY, ACCESS VALVE 17 MOTOR
5 SUPT, TUBE LIQUID 18 FAN PROPELLER
6 SUPT, GAS TUBE 19 FAN GUARD
7 ASSY, COIL L 20 PANEL, SERVICE T
8 ASSY, COIL R 21 PANEL, SERVICE B
9 STRUC, COIL 22 ASSY, S. HOISTING BRACKET
10 ASSY, STRUC. BACK L PARTS NOT IN DIAGRAM
11 ASSY, STRUC. BACK R PRESS SWITCH, 18PSI
12 CLAMP, TUBE LIQUID PRESSURE SWITCH, 426PSI
13 CLAMP, GAS TUBE PHASE PROTECTOR, PP1.03
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