● Bended indoor coil with treated aluminum fins and coating for improved efficiency.
● Easy access to the interconnecting tubing and wiring connections, so that removing
the front grill or casing is not necessary.
SM WNGDCI 2-E.4 GB
● Refrigerant pipes can be connected to the indoor unit from 5 different optional
directions.
● Automatic treated air sweep.
● Low indoor and outdoor noise levels.
● Easy installation and service.
1-1
Page 5
INTRODUCTION
CONTENTS
1.3 Indoor Unit
The indoor unit is wall mounted, and can be easily fitted to many types of residential
and commercials applications.
Indoor Unit features:
FeatureWNG 50WNG 60WNG 72 / 80
DisplayLCD or LEDLCD
IonizerYES
ESFYES
Fresh airYESNO
Indoor fan motorVariable speed (PG)
Horizontal motorized louverYES
Vertical motorized louverYES
Heating elementNO
M2L Cable portYES
Dry contactPresence detector or (jumper selected) power shedding
1.4 Filtration
The WNG DCI INV series presents several types of air filters:
● Easily accessible, and re-usable pre-filters (mesh)
● Pre-charged electrostatic filter (disposable)
● Active carbon filter (disposable)
● ESF. Active Electro Static re-usable filter (optional)
1.5 Ionizer (Optional)
A special design Ionizer protected by unique patents integrated into the indoor unit,
generating negative ions to the room providing comfort and upgraded indoor air quality.
1.6 Control
The microprocessor indoor controller, and an infrared remote control, supplied as
standard, provides complete operating function and programming.
Remote controllers: RC-2/3/4/5/7, RC-4i-1, RCW, μBMS.
Networking system Airconet version 4.2 and up, MIU SW version H8 and up.
1-2
SM WNGDCI 2-E.4 GB
Page 6
1.7 Outdoor Unit
CONTENTS
The WNG DCI INV outdoor units can be installed as floor or wall mounted units by using
a wall supporting bracket. The metal sheets are protected from corrosion paint work
allowing long life resistance. All outdoor units are pre-charged. For further information
please refer to the Product Data Sheet, Chapter 2.
Outdoor Unit Feature
FeatureDCI 50DCI 60DCI 72 / 72Z / 80
Display3 LED’s
Base HeaterOptional
Outdoor FanVariable speed DC Inverter
M2L cable PortNoYes
NightNoYes
STBYNoYes
INTRODUCTION
Power SheddingNoYes
AlarmNoYes
1.8 Tubing Connections
Flare type interconnecting tubing to be produced on site.
For further details please refer to the Installation Manual, Appendix A.
1.9 Accessories
ItemDescription
MIU (WNG)MODBUS interface unit
RS485 Adapter
Base Heater
M2L cable Port
To be used as an interface
with RCW or μBMS remote
controllers
1.10 Inbox Documentation
SM WNGDCI 2-E.4 GB
Each unit is supplied with its own installation and operation manuals.
1-3
Page 7
INTRODUCTION
CONTENTS
1.11 Matching Table
1.11.1 R410A
OUTDOOR UNITS
INDOOR UNITS
MODELREFR”
DCI 50R410A
DCI 60R410A
DCI 72
R410A
DCI 72Z
DCI 80R410A
WNG 50 DCI WNG 60 DCI WNG 72 DCIWNG 80 DCI
√
√
√
√
1-4
SM WNGDCI 2-E.4 GB
Page 8
PRODUCT DATA SHEET
CONTENTS
2.PRODUCT DATA SHEET
2.1 WNG 50 DCI
Model Indoor UnitWNG 50
Model Outdoor UnitDCI 50
Installation Method of PipeFlared
CharacteristicsUnitsCoolingHeating
Capacity
Power input
EER (Cooling) or COP(Heating)
(1)
(1)
(1)
Energy efficiency classAA
Power supplyV/Ph/Hz220-240V/Single/50Hz
Rated currentA6.6 7.5
Starting currentA10.5
Circuit breaker ratingA20
Fan type & quantityCrossflow x 1
Fan speedsH/M/LRPM1200/1050/900
Air flow
(2)
H/M/Lm3/hr850/760/620
External static pressureMin-MaxPa0
Sound power level
Sound pressure level
DimensionsWxHxDmm1060x295x210
Weightkg15
Package dimensionsWxHxDmm1125x360x280
Packaged weightkg18
Units per palletunits16 units per pallet
Stacking heightunits8 levels
Refrigerant controlEEV
Compressor type,modelScroll,Panasonic 5CS130XCC03
Fan type & quantityPropeller(direct) x 1
Fan speedsH/LRPM920
Air flow H/Lm3/hr2160
Sound power levelH/LdB(A)63
Sound pressure level
(4)
H/LdB(A)53
DimensionsWxHxDmm795x610x290
Weightkg39
Package dimensionsWxHxDmm945x655x395
Packaged weightkg43
Units per palletUnits9 units per pallet
OUTDOOR
Stacking heightunits3 levels
Refrigerant typeR410A
Refrigerant chargless distancekg/m1.50/7.5
Additional charge per 1 meterg/mNo need
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
SM WNGDCI 2-E.4 GB
2-1
Page 9
PRODUCT DATA SHEET
CONTENTS
2.2 WNG 60 DCI
Model Indoor UnitWNG-60
Model Outdoor UnitDCI60
Installation Method of PipeFlared
CharacteristicsUnitsCoolingHeating
Capacity
Power input
EER (Cooling) or COP(Heating)
(1)
(1)
(1)
Energy efficiency classBB
Power supplyV/Ph/Hz220-240V/Single/50Hz
Rated currentA8.9 8.6
Starting currentA10.5
Circuit breaker ratingA20
Fan type & quantityCrossflow x 1
Fan speedsH/M/LRPM1250/1100/1000
Air flow
(2)
H/M/Lm3/hr900/760/620
External static pressureMin-MaxPa0
Sound power level
DimensionsWxHxDmm1060x295x210
Weightkg15
Package dimensionsWxHxDmm1125x360x280
Packaged weightkg18
Units per palletunits16 units per pallet
Stacking heightunits8 levels
Refrigerant controlEEV
Compressor type,modelScroll,Panasonic 5CS130XCC03
Fan type & quantityPropeller(direct) x 1
Fan speedsH/LRPM820
Air flow H/Lm3/hr2860
Sound power levelH/LdB(A)65
Sound pressure level
(4)
H/LdB(A)55
DimensionsWxHxDmm846x690x302
Weightkg46
Package dimensionsWxHxDmm990x770x430
Packaged weightkg50
Units per palletUnits9 units per pallet
OUTDOOR
Stacking heightunits3 levels
Refrigerant typeR410A
Refrigerant chargless distancekg/m1.65/7.5
Additional charge per 1 meterg/mNo need
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
2-2
SM WNGDCI 2-E.4 GB
Page 10
PRODUCT DATA SHEET
CONTENTS
2.3 WNG 72 DCI
Model Indoor UnitWNG-DCI 72
Model Outdoor UnitGC-DCI 72
Installation Method of PipeFlared
CharacteristicsUnitsCoolingHeating
Capacity
Power input
EER (Cooling) or COP(Heating)
(1)
(1)
(1)
Energy efficiency classBC
Power supplyV/Ph/Hz220-240V/Single/50Hz
Rated currentA9.8 10.3
Starting currentA15
Circuit breaker ratingA20
Fan type & quantityCrossflow x 1
Fan speedsH/M/LRPM1300/1150/10001350/1200/1050
Air flow
(2)
H/M/Lm3/hr950/800/6501000/850/700
External static pressureMin-MaxPa0
Sound power level
Sound pressure level
DimensionsWxHxDmm1060x295x210
Weightkg15
Package dimensionsWxHxDmm1115x350x260
Packaged weightkg18
Units per palletunits16
Stacking heightunits8 levels
Refrigerant controlEEV
Compressor type,modelTwo Rotary,Mitsubishi TNB220F
Fan type & quantityPropeller(direct) x 1
Fan speedsH/LRPM850
Air flow H/Lm3/hr3600
Sound power levelH/LdB(A)66
Sound pressure level
(4)
H/LdB(A)56
DimensionsWxHxDmm950x835x412
Weightkg65.5
Package dimensionsWxHxDmm1080x910x477
Packaged weightkg73
Units per palletUnits2
OUTDOOR
Stacking heightunits2 levels
Refrigerant typeR410A
Refrigerant chargless distancekg/m2.4kg/30m
Additional charge per 1 meterg/mNo Need
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
SM WNGDCI 2-E.4 GB
2-3
Page 11
PRODUCT DATA SHEET
CONTENTS
2.4 WNG 72 / DCI 72Z
Model Indoor UnitWNG 72 DCI
Model Outdoor UnitDCI 72 Z R410A
DimensionsWxHxDmm1060x295x210
Net Weight kg15
Package dimensionsWxHxDmm1125x360x280
Packaged weightkg18
Units per palletunits16
Stacking heightunits8 levels
Refrigerant controlEEV
Compressor type,modelTwo Rotary,Sanyo(Sheny) C-7RVN153H0W
Fan type & quantityPropeller(direct) x 1
Fan speedsH RPM850
Air flow H m3/hr3600
Sound power levelH dB(A)66
Sound pressure level
(3)
H dB(A)56
DimensionsWxHxDmm950x835x412
Net Weightkg64.5
Package dimensionsWxHxDmm1080x910x477
Packaged weightkg72
Units per palletUnits4
OUTDOOR
Stacking heightunits2 levels
Refrigerant typeR410A
Standard chargekg(7.5m)2.3kg
Max.height differencem.15
Operation control type Remote control
Heating elements(Option)kW
Others
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
DimensionsWxHxDmm1200x340x236
Weightkg18.5
Package dimensionsWxHxDmm1305x430x325
Packaged weightkg24
Units per palletunits12 units per pallet
Stacking heightunits6 levels
Refrigerant controlEEV
Compressor type, modelTwin Rotary DC Inverter Mitsubishi TNB220F
Fan type & quantityPropeller(direct) x 1
Fan speedsH/LRPM850
Air flow H/Lm3/hr3600
Sound power level
Sound pressure level
(3)
(4)
H/LdB(A)66
H/LdB(A)56
DimensionsWxHxDmm950x412x835
Weightkg66
Package dimensionsWxHxDmm1080x477x910
Packaged weightkg73.5
Units per palletUnits2 units per pallet
OUTDOOR
Stacking heightunits3 levels
Refrigerant typeR410A
Refrigerant chargless distancekg/m2.75/30
Additional charge per 1 meterg/mNo need
Operation control type Remote control
Heating elementskW
Others
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
SM WNGDCI 2-E.4 GB
Max. height differencem.Max. 15
2-5
Page 13
3. RATING CONDITIONS
CONTENTS
Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units).
Cooling:
Indoor: 27oC DB 19oC WB
Outdoor: 35 oC DB
Heating:
Indoor: 20oC DB
Outdoor: 7oC DB 6oC WB
3.1 Operating Limits
3.1.1 R410A
RATING CONDITIONS
IndoorOutdoor
Cooling
Heating
Upper limit
32oC DB 23oC WB 46oC DB
Lower limit21oC DB 15oC WB-10oC DB
Upper limit27
Lower limit10
Volta ge
o
C DB 24oC DB 18oC WB
o
C DB-15oC DB -16oC WB
198 – 264 V
SM WNGDCI 2-E.4 GB
3-1
Page 14
4. OUTLINE DIMENSIONS
CONTENTS
4.1Indoor Unit: WNG 50 / 60 / 72 DCI
OUTLINE DIMENSIONS
4.2
Outdoor Unit: DCI 50
SM WNGDCI 2-E.4 GB
4-1
Page 15
OUTLINE DIMENSIONS
CONTENTS
4.3 Outdoor Unit: DCI 60
4.4 Indoor Unit: WNG 80
4-2
SM WNGDCI 2-E.4 GB
Page 16
4.5 Outdoor Unit: DCI 72 / 72 Z / 80
CONTENTS
OUTLINE DIMENSIONS
SM WNGDCI 2-E.4 GB
4-3
Page 17
PERFORMANCE DATA & PRESSURE CURVES
CONTENTS
5. PERFORMANCE DATA
5.1WNG 50 / DCI 50
5.1.1 Cooling Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.
OD COIL
ENTERING AIR DB
TEMPERATURE [0C]
DATA
ID COIL ENTERING AIR DB/WB TEMPERATURE [0C]
22/1524/1727/1929/2132/23
-10 - 20
(protection range)
TC80 - 110 % of nominal
SC80 - 105 % of nominal
PI25 - 50 % of nominal
TC4.935.225.515.806.09
25
SC4.104.164.224.284.34
PI1.101.131.151.181.20
TC4.674.965.255.545.83
30
SC3.944.004.064.124.18
PI1.261.28
TC4.424.71
35
SC3.783.843.903.964.02
PI1.411.44
TC4.174.46
40
SC3.623.683.743.803.86
PI1.561.591.611.641.66
TC3.864.154.444.735.02
46
SC3.433.493.553.613.67
PI1.751.771.801.821.85
LEGEND
TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor
1.31
5.00
1.46
4.75
1.331.36
5.295.58
1.481.51
5.045.53
5.1.2 Capacity Correction Factors
SM WNGDCI 2-E.4 GB
Cool ing Ca pacity Ratio Vs. Outdoor Temp era ture
1.20
1.10
1.00
0.90
0.80
0.70
Capaci ty Ration
0.60
0.50
202530354045
Outdoor DB Temperature [ºC]
5-1
Page 18
PERFORMANCE DATA & PRESSURE CURVES
CONTENTS
5.1.3 Heating Capacity (kW) - Run Mode)
230[V] : Indoor Fan at High Speed.
ID COIL ENTERING AIR DB TEMPERATURE [0C]
OD COIL ENTERING
AIR DB/WB
TEMPERATURE [0C]
DATA152025
-15/-16
-10/-12
-7/-8
-1/-2
2/1
7/6
10/9
15/12
15-24
(Protection Range)
TC2.732.341.94
PI1.161.241.33
TC3.603.212.82
PI1.311.401.48
TC4.263.873.47
PI1.431.511.59
TC4.594.193.80
PI1.481.571.65
TC4.814.414.02
PI1.52
TC6.39
PI1.58
TC6.72
PI1.611.691.77
TC7.066.666.27
PI1.641.721.80
TC85 - 105 % of nominal
PI80 - 120 % of nominal
LEGEND
TC – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor
1.60
6.00
1.66
6.33
1.69
5.61
1.74
5.94
5.1.4 Capacity Correction Factors
5-2
1.20
1.10
1.00
0.90
0.80
0.70
0.60
Capaci ty Rati on
0.50
0.40
Hea ti ng Ca pacity Ra tio Vs. Outdoor Te mpera ture
-15-10-5051015
Outdoor WB Temperature [ºC]
SM WNGDCI 2-E.4 GB
Page 19
PERFORMANCE DATA & PRESSURE CURVES
CONTENTS
5.2 WNG 60 / DCI 60
5.2.1 Cooling Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.
OD COIL
ENTERING AIR DB
TEMPERATURE [0C]
-10 - 20
(protection range)
25
30
35
40
(Protection Range)
46
(Protection Range)
ID COIL ENTERING AIR DB/WB TEMPERATURE [0C]
DATA
22/1524/1727/1929/2132/23
TC80 - 110 % of nominal
SC80 - 105 % of nominal
PI25 - 50 % of nominal
TC5.916.266.616.957.30
SC4.644.714.784.854.92
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
BAND CENTER FREQUENCIES, Hz
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
WNG 72WNG 80
APPROXIMATE
THRESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
HEARING FOR
CONTINUOUS
NOISE
NC-30
NC-20
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
SM WNGDCI 2-E.4 GB
BAND CENTER FREQUENCIES, Hz
6-1
Page 39
SOUND LEVEL CHARACTERISTICS
CONTENTS
6.3 Outdoor units
Unit
Mic.
Ground
Figure 2
6.4 Sound Pressure Level Spectrum
DCI 50 CoolingDCI 50 Heating
NC-70
NC-60
NC-50
NC-40
NC-30
APPROXIMATE
THRESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
(Measured as Figure 2)
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
6-2
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
DCI 60 CoolingDCI 60 Heating
NC-70
NC-60
NC-50
NC-40
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
SM WNGDCI 2-E.4 GB
BAND CENTER FREQUENCIES, Hz
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
Page 40
SOUND LEVEL CHARACTERISTICS
CONTENTS
Sound Pressure Level Spectrum (Measured as Figure 2)
DCI 72Z CoolingDCI 72Z Heating
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
DCI 72 / 80 CoolingDCI 72 / 80 Heating
NC-70
NC-60
NC-50
NC-40
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
SM WNGDCI 2-E.4 GB
6-3
Page 41
ELECTRICAL DATA
CONTENTS
7.ELECTRICAL DATA
7.1 Single Phase Unit
ModelWNG 50WNG 60WNG 72 / 80
Power Supply1 PH ,220-240VAC ,50HZ
Connected toTo indoorTo outdoor
Maximum Current13.5A15A15.7A
Inrush Current \
Starting Current\
Circuit Breaker20 A
Power Supply 3 X 2.5 mm²
Interconnecting cable 4 X 2.5 mm²
(a) Inrush current is the current when power is up (charging the DC capacitors
(b) Starting current is the current at compressor start up.
NOTE
Power wiring cord should comply with local lows and electrical
regulations requirements.
(a)
(b)
at outdoor unit controller).
45 A<35A
13.5 A15A15.7A
SM WNGDCI 2-E.4 GB
7-1
Page 42
8. WIRING DIAGRAMS
CONTENTS
8.1 Indoor Unit: WNG 50 / 60 DCI
WIRING DIAGRAMS
capacitor
gray
2uF 450V
PH-12
Di spl ay
IFAN
13
2
brown
gray
blue
P9
RAT
ICT
Fr esh Ai r
Ionizer
P5(whi te )
M
P2
P8
6
5
4
white
red
black
2121
P14P19P11P15P16
P3
(red)
P4
Ionizer
(Re d)
power out
211
ESF
ESF
P12
power out
2
Indoor unit controller PCB
Y/G
Red
Brown
Bl ue
P22P20
6
5/C
4/L
P13
L
Horizont al step motor
213
P6(Whi te)
P7
M1
meg at o ol
1
magn eti c ring
Vertical step motor
M2
54
P10( Red)
42
3
312
45
12
Jumper
910
871
To met al s he et
P1
Note: The dashed part is optional
Y/G
Brown
Blu e
Power suppl y
~230V 50Hz
Dry contact
P24
(clock)
8.2 Outdoor Unit: DCI 50 / 60
COMP
Red
U
Brown
Black
W
V
Choke coil
White
P13P9P3P11
Blue
P14
Reverse
valve
2
1
P4
Outdoor unit controllerPCB
Black
Red
Blue
Brown
P12
EARTH
Y/G
Y/G
EMI filter PCB
EARTH
NCOM
COM
N-F
L-F
JP9
FUSE
P10
COML
N-COM
N
Base
heater
2
1
P1
Jumper
2
13
EARTH
COM
OFAN
cc
Vdc
12
Red
12
P6
4
5
Vsp
V
EARTH
FG
34
56
Blue
2
1
Yel lo w
Black
Orange
34
5 6
6
P2
P7
6
2
3
5
4
CTTOAT OCT
2
JP1
1
22
P891P02P
Flash
4
3
111
1
EEV
Y/G
Red
L
N
Brown
Blue
C/5
L/4
N/3
Y/G
Red
Brown
Blue
SM WNGDCI 2-E.4 GB
8-1
Page 43
WIRING DIAGRAMS
CONTENTS
8.3 Indoor & Outdoor Units: WNG 72 DCI
INDOOR UNIT
8-2
OUTDOOR UNIT
SM WNGDCI 2-E.4 GB
Page 44
8.4 Outdoor Units: DCI 72Z
CONTENTS
WIRING DIAGRAMS
RED
U
3P
L
N
PMOC
BLK
BRN
W
V
11P
9P
01P
MOC
CORE
FERRITE
WHITE
31P
MOC-N
KCALB
DER
EULB
NWORB
EKOHC
LIOC
BLUE
41P
G/Y
ESREVER
EVLAV
ESAB
RETAEH
)LANOITPO(
NAFO
TTCTCO
TSHTAOTMO
143562
2
1
4P
21
1P
1
112
6P
ABCPRELLORTNOCUDO
21P
21HTRAE
9PJ
65
4
3
65
2
91P
02P
7P
342
12
2211
2P
5P
8P
1
VEE
SNIAMCA
ABCPRETLIFIME
HTRAE
MOCN
MOC
F-N
F-L
HTRAE
MOC
N
L
L
ESUF
N
DER
NWORB
EULB
DER
NWORB
EULB
EROCETIRREF
CNLNL
OT
UDI
SM WNGDCI 2-E.4 GB
8-3
Page 45
WIRING DIAGRAMS
CONTENTS
8.5 Indoor & Outdoor Units: WNG 80 DCI
INDOOR UNIT
8-4
OUTDOOR UNIT
SM WNGDCI 2-E.4 GB
Page 46
9. REFRIGERATION DIAGRAMS
CONTENTS
9.1 Heat Pump Models
9.1.1 WNG 50, 60 / DCI 50, 60 Cooling Mode
EEV
REFRIGERATION DIAGRAMS
9.1.2 WNG 50, 60 / DCI 50, 60 Heating Mode
EEV
SM WNGDCI 2-E.4 GB
9-1
Page 47
REFRIGERATION DIAGRAMS
CONTENTS
9.1.3 WNG 72, 80 / DCI 72, 72 Z, 80
OUTDOOR UNIT
Sensor
INDOOR UNIT
Sensor
Outdoor coil
Reverse
valve
Strainer
COOLING & DRY MODE
OUTDOOR UNIT
EEV
Compressor
Strainer
Valves
Flared
connection
Indoor coil
INDOOR UNIT
Sensor
9-2
Outdoor coil
Reverse
Strainer
valve
Compressor
Valves
EEV
Strainer
HEATING MODE
Revision Y07
Flared
connection
Sensor
Indoor coil
SM WNGDCI 2-E.4 GB
Page 48
10. ELECTRICAL CONNECTIONS
CONTENTS
10.1 WNG 50, WNG 60 DCI
1
3
2
ELECTRICAL CONNECTIONS
ESF-PWR
COOL
ESF-EN
HEAT
RESET
MODE
5/C
4/L
L
N
A
4
N
4/L
5/C
7
6
B
5
SM WNGDCI 2-E.4 GB
1. Indoor unit terminal
2. Ground wire.
3. Indoor coil.
4.Power cable in the indoor side.
5. Multiple wire cable.
6. Cable clamp.
7. Outdoor unit wire terminal.
A. OUTDOOR B. INDOOR
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ELECTRICAL CONNECTIONS
CONTENTS
10.2 WNG 72, WNG 80 DCI
1
ESF-PWR
COOL
5/C
ESF-EN
HEAT
RESET
MODE
4/L
L
N
3
2
7
A
1. Indoor unit terminal
2. Ground wire.
3. Indoor coil.
4. Multiple wire cable.
N
4/L
5/C
6
5
B
4
5. Cable clamp.
6. Outdoor unit wire terminal.
7. Power cable in the outdoor side
(only for outdoor unit power supply)
2. Refrigerant Valve Port (use Allen wrench to open/close)
3. Valve Protection Cap
4. Refrigerant Valve
5. Service Port Cap
6. Flare Nut
7. Unit Back Side
8. Copper Tube
When the outdoor unit is installed above the indoor unit an oil trap is required every 5m along the suction line at the lowest point of the riser. Incase the indoor unit is installed above the outdoor, no trap is required.
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CONTROL SYSTEM
CONTENTS
12. CONTROL SYSTEM
12.1 General Functions and Operating Rules
The DCI software is fully parametric.
All the model dependent parameters are shown in Blue color and with Italic style [parameter].
The parameters values are given in the last section of this control logic chapter of the service
manual.
12.1.1 System Operation Concept
The control function is divided between indoor and outdoor unit controllers. Indoor unit is the system
‘Master’, requesting the outdoor unit for cooling/heating capacity supply. The outdoor unit is the
system ‘Slave’ and it must supply the required capacity unless it enters into a protection mode
avoiding it from supplying the requested capacity.
The capacity request is transferred via indoor to outdoor communication, and is represented by
aparameter called ‘NLOAD’. NLOAD is an integer number with values between 0 and 127, and it
represents the heat or cool load felt by the indoor unit.
12.1.2 Compressor Frequency Control
12.1.2.1 NLOAD setting
The NLOAD setting is done by the indoor unit controller, based on a PI control scheme.
The actual NLOAD to be sent to the outdoor unit controller is based on the preliminary LOADcalculation,
the indoor fan speed, and the power shedding function.
NLOAD limits as a function of indoor fan speed:
Indoor Fan Speed Maximum NLOAD Cooling Maximum NLOAD Heating
Indoor Fan SpeedMaxium NLOAD Cooling Maxium NLOAD Heating
ModePower Shedding OFFPower Shedding ON
Cooling No limitNominal Cooling
HeatingNo limitNominal heating
12.1.3 Target Frequency Setting
12.1.3.1 Target Frequency Setting for DCI 50 / 60 / 72Z
The compressor target frequency is a function of the NLOAD number sent from the indoor
controller and the outdoor air temperature.
Basic Target Frequency Setting:
SM WNGDCI 2-E.4 GB
NLOADTarget Frequency
127Maximum Frequency
10<NLOAD<127Interpolated value between minimum and maximum frequency
10Minimum frequency
0Compressor is stopped
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CONTROL SYSTEM
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Target frequency limits as a function of outdoor air temperature (OAT):
OAT RangeCooling Mode limitsHeating Mode limits
OAT < 6
6 ≤ OAT < 15MaxFreqAsOAT1H
15 ≤ OAT < 28
28≤ OATNo limit
12.1.3.2 Target Frequency Setting for DCI 72 / 80
The compressor Target Speed is calculated according to the following formula:
load
MaxFreqAsOATC
,maxarg
MaxSpeedMinSpeedSpeedetT
No limit
MaxFreqAsOAT2H
ODUNload
127
MiniSpeed, MaxSpeed are defined as following:
When the unit is in the cool mode, MiniSpeedC = 15Hz, MaxSpeed = 75Hz
When the unit is in the heat mode, MiniSpeedH = 20Hz, MaxSpeed = 95Hz
ODU NLOAD is caculated according to the IDU NLoad:
*3
127,
NLOADODU
min
IDUNLOAD
ODUCode
OATODUCodeCODUCodeCIDUNLOAD
≤-533
≤-53.83
Refer to sect.112.1.2.1
12.1.4 Frequency Changes Control
When the unit is running normally , the compressor frequency change rate is 1 Hz/sec.
12.1.5 Compressor Starting Control
12.1.5.1 Compressor starting control for DCI 50 / 60 / 72Z
Step3
Step2
Step1
1
Minute
1
Minute
Min 10 Minutes
Time
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CONTROL SYSTEM
CONTENTS
12.1.5.2 Compressor starting control for DCI72/80
Step 1
Whenever the compressor starts up, after it has been off for more than 45 minutes, the compressor
frequency cannot go below Step1RPS for 3 continuous minutes (this rule comes to ensure oil return to the compressor).
Step 2
The compressor speed cannot go above Step2RPS once after each compressor start up for 3
continuous minutes (this rule comes to prevent oil exit from the compressor after its start up).
Step 3
The speed cannot go higher than Step3RPS unless it was operating for more than 1 continuous
minutes between Step3RPS – 5 and Step3RPS .
After passing above Step3RPS, this rule is re-applied when passing below Step3RPS-5.
12.1.6 Minimum On and Off Time
3 minutes
12.1.7 Indoor Fan Control
8 Indoor fan speeds are determined for each model. 4 speeds for cool/dry/fan modes and 4 speeds
for heat mode.
When user sets the indoor fan speed to a fixed speed (Low/ Medium/ High), unit will operate constantly
at set speed.
When Auto Fan is selected, indoor unit controller can operate in all speeds. The actual speed is set
according to the cool/heat load.
12.1.7.1 Turbo Speed
The Turbo speed is activated during the first 30 minutes of unit operation when auto fan speed is
selected and under the following conditions:
Difference between set point and actual room temperature is bigger then 3 degrees.
Room temperature > 22 for cooling, or < 25 for heating.
12.1.8 Outdoor Fan Control
12.1.8.1 Outdoor Fan Control for DCI 50/ 60
7 outdoor fan speeds are determined for each model. 3 speeds for cool and dry modes, and 3
speeds for heat mode, and a very low speed.
Outdoor fan speed is a function of compressor frequency and outdoor air temperature (OAT).
4 routines for fan control are determined. The control routine selection depends on operation mode,
compressor speed, outdoor air temperature (OAT) and heat sink temperature (HST).
Routine Conditions
Heating with OAT < 15°C
or
A
BCooling with 20°C > OAT > 7°C
CCooling with 7°C > OAT
DHeating with OAT > 15°C
Cooling with OAT > 20°C,
or
Faulty OAT
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CONTROL SYSTEM
CONTENTS
Compressor
Target Frequency
Freq=0OFFOFFOFFOFF
10 ≤ Freq < OFLowFreqLowLowVLLow
OFLowFreq ≤ Freq< OFMedFreqMediumLowVLLow
OFMedFreq≤ FreqHighLowLowMedium
Routin
A
OFAN Speed
Routin
B
Routin
C
Routin
D
When compressor is switched to OFF and the heat sink temperature is above 55 degrees, the
outdoor fan will remain ON in low speed for up to 3 minutes.
OFAN State
at Cool Mode
A
B
C
3 Degrees
Note: Periorities A>B>C
3 Degrees
7
20
HST
Change To Higher
OFAN Cool state (*1)
50
OAT
45
(*1) If State C, change to B
Change To lower
OFAN Cool state
If State B, change to A
12.1.8.2 Outdoor Fan Control for DCI 72 / 72Z / 80
OFAN operates between any speed OFMinRPM to OFMaxRPM.
The fan speed is also related to protections and OMT value.
* For DCI 72Z, in heating mode the OFAN speed is related to OCT.
12.1.9 EEV (Electronic Expansion Vavle) Control
12.1.9.1 EEV Control for DCI50/60
EEV opening is defined as EEV = EEVOL + EEVCV
EEVOL is the initial EEV opening as a function of the compressor frequency, operation mode, unit
model and capacity.
EEVCV is a correction value for the EEV opening that is based on the compressor temperature.
During the first 5 minutes of compressor operation EEVCV = 0.
Once the first 5 minutes are over, the correction value is calculated as follow: EEVCV(n) =
EEVCV(n-1) + EEVCTT
EEVCTT is the correction based on the compressor temperature. A target compressor temperature
is set depending on frequency and outdoor air temperature, and the actual compressor temperature
is compared to the target temperature to set the required correction to the EEV opening
.
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CONTROL SYSTEM
CONTENTS
12.1.9.2 EEV Control for DCI72/72Z/80
The target EEV value is the sum of open loop value (OL) and a result of the accumulative
correction values (CV).
EEVCV is a correction value for the EEV opening that is based on the compressor temperature,
During the first 6 minutes after SB the correction is not calculated. After that the correction value is
updated every 30 seconds.
12.1.10 RV(Reversing Valve) Control
Reversing valve is on in heat mode.
Switching of RV state is done only after compressor is off for over 3 minutes.
12.1.11 Ioniser Control
Ioniser is on when unit is on ,AND indoor fan is on ,AND Ioniser power switch (on Ioniser) is on.
is defined in accordance to the compressor frequency
OL
12.1.12 Base Heater Control
The base heater will be working only when RV is “ON” according to the following graph:
Base
Heater
OFF
ON
0
2
OAT
When OAT is faulty the base heater will be “ON” continuously in HEAT mode.
12.2 Fan Mode
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the differencebetween
actual room temperature and user set point temperature.
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CONTROL SYSTEM
CONTENTS
12.3 Cool Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
12.4 Heat Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
12.4.1 Temperature Compensation
In wall mounted, ducted, and cassette models, 3 degrees are reduced from room temperature
reading (except when in I-Feel mode), to compensate for temperature difference between high and
low areas in the heated room, and for coil heat radiation on room thermistor.
The temperature compensation can be enabled/disabled by shortening of J2 on the indoor unit
Controller
Indoor fan speed depends on the indoor coil temperature:
12.5 Auto Cool/Heat Mode
When in auto cool heat mode unit will automatically select between cool and heat mode according
to the difference between actual room temperature and user set point temperature (.T). Unit will
switch from cool to heat when compressor is off for 3 minutes, and .T < -3.
Unit will switch from heat to cool when compressor is off for 5 minutes, and .T < -3.
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CONTROL SYSTEM
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12.6 Dry Mode
As long as room temperature is higher then the set point, indoor fan will work in low speed and
compressor will work between 0 and MaxNLOADIF1C Hz.
When the room temperature is lower than the set point, compressor will be switched OFF and indoor
fan will cycle 3 minutes OFF, 1 minute ON.
12.7 Protections
There are 5 protection codes.
Normal (Norm) – unit operate normally.
Stop Rise (SR) – compressor frequency can not be raised but does not have to be decreased.
HzDown1 (D1) – Compressor frequency is reduced by 2 to 5 Hz per minute.
HzDown2 (D2) – Compressor frequency is reduced by 5 to 10 Hz per minute.
Stop Compressor (SC) – Compressor is stopped.
There are two sets of OVRPWR values, the selection of the values are set according to the state of
the Power-Shed input.
Power-Shed input open Set values 1
Power-Shed input sort Set values 2
Deicing operation will start when either one of the following conditions exist:
Case 1: OCT < OAT – 8 AND TLD > DI
Case 2: OCT < OAT – 12 AND TLD > 30 minutes.
Case 3: OCT is Invalid AND TLD > DI
Case 4: Unit is just switched to STBY AND OCT < OAT – 8
Case 5: NLOAD = 0 AND OCT < OAT -8
Case 6: OCT<-19 AND TLD>60 minutes
All this condition will exist during 10 seconds
OCT – Outdoor Coil Temperature
OAT – Outdoor Air Temperature
TLD – Time from Last Deicing
DI – Deicing Interval (Time Interval Between Two Deicing)
Deicing interval time when compressor is first started in heat mode, is 10 minutes if OCT < -2, and
is 40 minutes in other cases.
Deicing interval time is changed (increased/ decreased in 10 minutes steps) as a function of deicing
time. If deicing time is shorter then former deicing time, the deicing interval time will be increased. If
deicing time is longer then former deicing time, the deicing interval time will be decreased.
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► Deicing Operation Procedure
CONTENTS
OCT
12
0
Threshold
CONTROL SYSTEM
COMP
DeiceFreqChRV
RV
OFAN
EEV
ON
HEAT
COOL
ON
OFF
EEVDeicerOpen
Any
T1T2
DT
max. 12 minutes
T3T3
T1
T1=60 secondes;T2=36 secondes;T3=6 secondes
12.7.7.2 Outdoor coil Deicing Protection For DCI 72 / 80
► Entering Deicing Conditions
Deicing operation will start when either one of the following conditions exist:
Case 1: OCT < OAT – 8 AND TLD > DI
Case 2: OCT < OAT – 12 AND TLD > 30 minutes.
Case 3: OCT is Invalid AND TLD > DI
Case 4: Unit is just switched to STBY AND OCT < OAT – 8
Case 5: NLOAD = 0 AND OCT < OAT - 8
Case 6: OAT is invalid AND OCT< 8 AND TLD > DI AND Compressor ON Time > 15 minutes
All this condition will exist during 400 seconds
OCT – Outdoor Coil Temperature
OAT – Outdoor Air Temperature
TLD – Time from Last Deicing
DI – Deicing Interval (Time Interval between Two Deicing)
Deicing interval time when compressor is first started in heat mode, is 10 minutes if OCT < -2, and
is 40 minutes in other cases.
Deicing interval time is changed (increased/ decreased in 10 minutes steps) as a function of deicing
time. If deicing time is shorter then former deicing time, the deicing interval time will be increased. If
deicing time is longer then former deicing time, the deicing interval time will be decreased.
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CONTROL SYSTEM
CONTENTS
► Deicing Operation Procedure
OCT
12
0
Threshold
COMP
RV
OFAN
EEV
ON
HEAT
COOL
ON
OFF
EEVDeicerOpen
Any
T1T2
max. 12 minutes
DT
T3T3
T1=50 secondes;T2=36 secondes;T3=6 secondes
12.7.8 Condensate Water Over Flow Protection
T1
Each of the pins P1, P2, P3 can have two options:
1 – When it is shorted with P4
0 – When it is not shorted to P4
► Water Level Protection-1 level
P1P2P3Level
Don’t careDon’t care1Normal
Don’t careDon’t care0Overflow
(*) 1- Pin P1, P2, or P3 is connected to P4.
0- Pin P1, P2 or P3 is not connected to P4.
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CONTROL SYSTEM
CONTENTS
Water Level
OPER
LED
NLOAD
PUMP
Overflow
Normal
ON
OFF
BLINK
ANY
0
ON
OFF
Overflow when
unit is ON
NLOAD is
forced to 0
8 min8 min
Overflow when
unit is OFF
8 min
12.8 Indoor Unit Dry Contact
Indoor unit Dry contact has two alternative functions that are selected by J9.
Forced operation allows to start, stop and operate in Cooling or Heating, in pre-set
temperature according to the following table:
Forced operation ModePre-set Temperature
Cooling20°C
Heating28°C
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CONTROL SYSTEM
CONTENTS
12.10 On Unit Controls and Indicators
12.10.1 Indoor Unit controller Controls and Indicatiors for All Models
Except for Floor/Ceiling model
During OFF, Fan, Cool, Heat, Dry, and Auto modes (for operation in other modes, see at the
relevant spec paragraph):
STAND BY
INDICATOR
OPERATION
INDICATOR
TIMER INDICATORLights up during Timer and Sleep operation.
FILTER INDICATORLights up when Air Filter needs to be cleaned.
COOLING INDICATOR
HEATING INDICATOR
Mode SWITCH
(COOL/HEAT/OFF)
1. Lights up when the Air Conditioner is connected to power
and ready to receive the R/C commands
1. Lights up during operation.
2. Blinks for 300 msec., to announce that a R/C infrared
signal has been received and stored.
3. Blinks continuously during protections (according to the
relevant spec section).
Lights up when system is switched to Cool Mode by using the
Mode Switch on the unit.
Lights up when system is switched Heat Mode by using the Mode
Switch on the unit.
Every short pressing , the next operation mode is selected, in this
order : SB → Cool Mode → Heat Mode → SB → …
In long pressing system enters diagnostic mode.
For short pressing:
When Filter LED is on - turn off the FILTER INDICATOR
RESET / FILTER
SWITCH
after a clean filter has been reinstalled.
When Filter LED is off – enable/disable the buzzer
announcer, if selected.
In long pressing system enters set up mode (if in SB).
12.10.2 Outdoor Unit controller Indicatiors
Unit has three LED’s.
SB LED is ON when power is ON (230 VAC, even when no communication).
STATUS LED is ON when COMP is ON, and Blinks according to diagnostics mode definitions when
either fault or protection occurs.
FAULT LED Blinks according to diagnostics mode definitions when either fault or protection occurs.
12-14
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CONTROL SYSTEM
CONTENTS
12.11 Test Mode
12.11.1 Entering Test Mode
System can enter Test mode in two ways:
Automatically when the following conditions exists for 30 minutes continuously:
Mode = Cool, Set point = 16, Room temperature = 27(+1/−2), Outdoor temperature = 35(+2/-1)
Or
Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature = 7±(+1/-2)
Manually when entering diagnostics with the following settings:
Mode = Cool, Set point = 16
Mode = Heat, Set point = 30
12.11.2 Unit Operation in Test Mode
In test mode, the unit will operate in fixed settings according to the indoor fan speed setting:
NLOAD limits as a function of selected indoor fan speed
MaxNLOADIF1C404045505368
MaxNLOADIF2C535362857590
MaxNLOADIF3C120120120120105120
MaxNLOADIF4C127127127127127127
MaxNLOADIF5C127127127127127127
When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH
VOLTAGE!!!
Never open the Outdoor unit before turning off the Power!!!
When turned off, the system is still charged (400V)!!!
It takes about 3 Min. to discharge the system.
Touching the controller before discharging may cause an electrical shock!!!
13.1.1 Single Split System failures and Corrective Actions
NoSymptom Probable CauseCorrective Action
Power supply indicator
1
(Red LED) does not light
up.
Unit does not respond to
2
remote control message
Unit responds to remote
control message but
3
Operate indicator (Green
LED) does not light up
Indoor fan does not start
4
(louvers are opened and
Green LED does light up)
Indoor fan works when
unit is OFF, and indoor
5
fan speed is not changed
by remote control
command.
Compressor does not
6
start
Check power supply. If power
No power supply
Remote control message
not reached the indoor
unit
Problem with display
PCB
Unit in heat mode and
coil is still not warm.
Problem with PCB or
capacitor
PCB problemReplace controller
Electronics control
problem or protection
supply is OK, check display and
display wiring. if OK, replace
controller.
Check remote control batteries,
if batteries are OK, check display
and display wiring, if OK, replace
display PCB.
If still not OK replace controller.
Replace display PCB.
If still not OK replace controller.
Change to cool mode and check.
Change to high speed and Check
power supply to motor is higher
than 130VAC (for triack controlled
motor) or higher than 220VAC for
fixed speed motors, if OK replace
capacitor, if not OK replace
controller.
Perform diagnostics and follow
the actions described.
7
8
SM WNGDCI 2-E.4 GB
Compressor stops during
operation and Green LED
remains on
Compressor is on but
outdoor fan does not work
Electronic control or
power supply problem
Problem with outdoor
electronics or outdoor fan
Perform diagnostics and follow
the actions described.
Check outdoor fan motor
according to the procedure below,
if not OK replace controller.
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TROUBLESHOOTING
CONTENTS
NoSymptom Probable CauseCorrective Action
Check RV power connections, if
Unit works in wrong mode
9
(cool instead of heat or
heat instead of cool)
All components are
10
operating properly but no
cooling or no heating
Compressor is over
11
heated and unit does not
generate capacity
Electronics or power
connection to RV
Refrigerant leakCheck refrigeration system.
EEV problemCheck EEV.
OK,
check RV operation with direct
230VAC power supply, if OK,
replace outdoor controller.
Units goes into
protections and
12
compressor is stopped
with no clear reason
Compressor motor is
13
generating noise and no
suction occurs
Water leakage from
14
indoor unit
Freezing of outdoor unit
in heat mode and outdoor
15
unit base is blocked with
ice
Unit operates with wrong
16
fan speeds or wrong
frequency
Control problem or
refrigeration system
problem
Phase order to
compressor is wrong
Indoor unit drainage tube
is blocked
Wrong jumper settings
Perform diagnostics , and follow
the actions described.
Check compressor phase order.
Check and open drainage tube.
Connect base heater.
Perform diagnostics, and check
if units is operating by EEPROM
parameters.
13.1.2 Checking the refrigeration system
Checking system pressures and other thermodynamic measures should be done when system is in
Test Mode (in Test mode, system operates in fixed settings). The performance curves given in this
manual are given for unit performance in test mode when high indoor fan speed is selected.
Entering test mode:
Set unit to Cool/16 degrees/High indoor fan speed, or Heat/30 degrees/High indoor fan speed, and
enter diagnostics.
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CONTENTS
13.1.3 Judgment by Indoor/Outdoor Unit Diagnostics
Enter diagnostics mode - press for five seconds Mode button in any operation mode. Acknowledgment
is by 3 short beeps and lights of COOL and HEAT LED’s. Then, every short pressing of Mode button
will scroll between Indoor and Outdoor unit diagnostic modes by the acknowledgment of 3 short
beeps and lighting of COOL and HEAT LED’s.
During the Outdoor unit diagnostics all four Indoor LED’s (STBY, Operate, Filter and Timer) are
blinking. When Indoor diagnostics is displayed, all four LED’s (STBY, Operate, Filter and Timer) are
ON.
When system enters diagnostics mode, only one fault code is shown. Order of priority is from the
lower to the higher number. Diagnostics is continuously ON as long as power is ON. The current
system operation mode will not be changed.
If no fault occurred in the system, no fault code will be displayed during normal operation mode. The
last fault code will be displayed even if the system has recovered from that fault. The last fault will be
deleted from the EEPROM after the system has exit diagnostics mode.
In diagnostics mode, system fault / status will be indicated by blinking of Heat & Cool LEDs.
The coding method will be as follows:
Heat LED will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds. Cool LED
will blink during the same 5 seconds according to the following Indoor / Outdoor unit tables:
Note: 0 – OFF, 1-ON
13.1.4 Indoor Unit Diagnostics
NoProblem54321
1RT-1 is disconnected00001
2RT-1 is shorted00010
3RT-2 is disconnected00011
4RT-2 is shorted00100
5Reserved00101
7Communication mismatch00111
8No Communication01000
9No Encoder01001
10Reserved01010
11Outdoor Unit Fault01011
…Reserved
17Defrost protection10001
18Deicing Protection10010
19Outdoor Unit Protection10011
20Indoor Coil HP Protection10100
21Overflow Protection10101
22Reserved
24EEPROM Not Updated11000
25Bad EEPROM11001
26Bad Communication11010
27Using EEPROM data11011
28Model A11100
29Model B11101
30Model C 11110
31Model D11111
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13.1.4.1 Indoor Unit Diagnostics and Corrective Actions
No.FaultProbable CauseCorrective Action
Sensor failures of
1
all types
Communication
2
mismatch
3No Communication
4No EncoderIndoor electronics or motor
5Outdoor Unit FaultOutdoor controller problem
EEPROM Not
6
Updated
7Bad EEPROM
Bad
8
Communication
Indoor and Outdoor
controllers are with
different versions
Communication or
grounding wiring is not
good.
System is using ROM
parameters and not
EEPROM parameters
Communication quality is
low reliability
Check sensor connections or
replace sensor
Replace Indoor controller
Check Indoor to Outdoor
wiring and grounding
Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
Switch to Outdoor
diagnostics.
No action, unless special
parameters are required for
unit operation.
No action, unless special
parameters are required for
unit operation.
Check Indoor to Outdoor
wiring and grounding
9
10
11
12
13
Using EEPROM
data
The power supply
indicator (red led)
doesn’t light up.
TThe operating
indicator (green
led) does not light
up
The operating
indicator (green
led) does not light
up when starting
from unit..
The indoor fan
does not function
correctly.
No problem. System is
using EEPRRRROM
parameters
There is no correct voltage
between the line and
neutral terminals on main
P.C.B.
The remote control
batteries are discharged
Check main P.C.B and
display P.C.B.
Check the voltage
between indoor fan
terminals on the main
P.C.B
-If the voltage is low repair
power supply.
-If there is no voltage repair
general wiring.
-If there is correct voltage
replace main or display
P.C.B’S
-Replace batteries of the
remote control
-Replace P.C.B if necessary.
- If there is voltage replace
capacitor or motor.
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TROUBLESHOOTING
CONTENTS
No.FaultProbable CauseCorrective Action
14
15
The outdoor fan
does not function
correctly.
The compressor
does not start up.
Check the voltage
between indoor fan
terminals on the main
P.C.B.
There is voltage between
outdoor fan terminals on
the outdoor unit.
There is no voltage
between outdoor fan
terminals on the outdoor
unit.
Check voltage on
compressor terminals on
the outdoor unit. (with
ampmeter)
Check if there is correct
voltage between
compressor terminals on
the outdoor unit.
- If there is no voltage
replace main P.C.B
- Replace capacitor or motor.
- Check and repair electrical
wiring between indoor and
outdoor units.
-If no voltage replace main
P.C.B.
- If low voltage repair power
supply.
-If the voltage corrrect
replace capacitor or
compressor.
-If there is no voltage repair
electrical wiring between
indoor and outdoor units.
16
17
18
19
The refrigeration
system does not
function correctly.
No cooling or
heating only indoor
fan works.
Only indoor fan
and compressor
working.
Only indoor fan
working.
Check for leaks or
restrictions, with
ampmeter, pressure guage
or surface thermometer.
Outdoor fan motor faulty
or other fault caused,
compresssor overload
protection cut out.
Outdoor fan blocked.
-Run capacitor of outdoor
fan motor faulty.
-Windings of outdoor fan
are shorted.
- Repair refrigeration system
and charge refrigerant if
necessary.
-Replace P.C.B.
- Outdoor fan blocked
remove obstructions.
- Remove obstructions.
- Replace capacitor.
-Replace motor.
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No.FaultProbable CauseCorrective Action
- Overload safety device
20
No cooling or
heating takes
place, indoor
and outdoor fans
working.
on compressor is cut
out (low voltage or high
temperature)
- Compressor run
capacitor faulty.
- Check for proper voltage,
switch off power and try
again after one hour.
- Replace compressor
capacitor.
21
22
23
24
No air supply
at indoor unit,
compressor
operates.
Partial, limited air
supply at indoor
indoor unit.
Water accumulates
and overflow from
indoor unit section.
Water dripping
from outdoor unit
base. (in heating
mode)
- Compressor windings
are shorted.
-Indoor fan motor is
blocked or turns slowly.
-indoor fan run capacitor
faulty.
- motor windings are
shorted.
Lack of refrigerant
(will accompanied by
whisteling noise) cause ice
formation on indoor unit
coil in cooling mode.
Drain tube or spout of
drain pan clogged.
Water drain outlet is
clogged.
- Replace compressor.
- Check voltage,repair wiring
if necessary.
-Check fan wheel if it is
tight enough on motor
shaft,tighten if necessary.
-Replace indoor fan motor.
-Charge the unit after
localizing leak.
-Disasemble plastic drain
tube from spout of indoor unit
drain pan.
-Open outdoor unit cover
clean out water outlet ,clean
the base inside througly.
25
13-6
Freeze-up of
outdoor coil in
heating mode, poor
heating effect in
room, indoor fan
operates.
-Faulty outdoor thermistor.
-Faulty control cable.
- Outdoor temperature is
too low (below -2°C)
-Outdoor unit air outlet is
blocked.
-Replace thermistor.
- Repair control cable.
- Shut unit off, outdoor temp.
is below design conditions
and cannot function properly.
-Remove obstructions.
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13.1.5 Outdoor Unit Diagnosits
NoProblem54321
1OCT is disconnected00001
2OCT is shorted00010
3CTT is disconnected00011
4CTT is shorted00100
5HST is disconnected (when enabled)00101
6HST is shorted (when enabled)00110
7OAT is disconnected (when enabled)00111
8OAT is shorted (when enabled)01000
9TSUC is disconnected (when enabled)01001
10TSUC is shorted (when enabled)01010
11IPM Fault01011
12Bad EEPROM01100
13DC under voltage01101
14DC over voltage01110
15AC under voltage 01111
16Indoor / Outdoor unit Communication mismatch10000
17No Communication10001
18Reserved10010
20Heat sink Over Heating10100
21Deicing10101
22Compressor Over Heating10110
23Compressor Over Current10111
24No OFAN Feedback11000
25OFAN locked11001
26Compressor Lock11010
27Bad Communication11011
13.1.5.1 Outdoor Unit Diagnostics and Corrective Actions
NoFaultProbable CauseCorrective Action
Sensors failures of all
1
types
2IPM Fault
3Bad EEPROM
4DC under/over Voltage
5AC under Voltage
Indoor / Outdoor unit
6
Communication mismatch
7No Communication
8Compressor Lock
9Bad Communication
Electronics HW problem
Electronics HW problem
Indoor and Outdoor
controllers are with
different versions
Communication or
grounding wiring is not
good.
Communication quality is
low reliability
Check sensors connections or replace sensors.
Check all wiring and
jumper settings, if OK,
replace electronics.
No action, unless special
parameters are required
for unit operation.
Check outdoor unit power supply voltage
Check outdoor unit power supply voltage
Replace Indoor controller
Check Indoor to Outdoor
wiring and grounding
Switch unit to STBY and
restart
Check Indoor to Outdoor
wiring and grounding
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13.1.6 Judgment by MegaTool
MegaTool is a special tool to monitor the system states.
Using MegaTool requires:
A computer with RS232C port.
A connection wire for MegaTool.
A special MegaTool software.
Use MegaTool according to following procedure:
Setup MegaTool software: copy the software to the computer.
Connect RS232C port in computer with MegaTool port in Indoor/Outdoor unit controller by the
connection wire.
Run the software and choose the COM port, you can monitor the A/C system state
In monitor tab
13.1.7 Simple procedures for checking the Main Parts
13.1.7.1 Checking Mains Voltage.
Confirm that the Mains voltage is between 198 and 264 VAC. If Mains voltage is out of this range,
abnormal operation of the system is expected. If in range check the Power (Circuit) Breaker and look
for broken or loosed cable lugs or wiring mistake(s).
13.1.7.2 Checking Power Input.
If Indoor unit power LED is unlighted, power down the system and check the fuse of the Indoor unit.
If the fuse is OK replace the Indoor unit controller. If the fuse has blown, replace the fuse and power
up again.
Checking Power Input procedure for the Outdoor unit is the same as with the Indoor unit.
13.1.7.3 Checking the Outdoor Fan Motor.
Enter Test Mode (where the OFAN speed is high)
Check the voltage between lead wires according to the normal value as following:
Between red wire and black wire: 310VDC +/- 20V
Between orange wire and black wire: 15VDC +/- 1V
Between yellow wire and black wire: 2-6VDC
13.1.7.4 Checking the Compressor.
The compressor is brushless permanence magnetic DC motor. Three coil resistance is same. Check
the resistance between three poles. The normal value should be below 0.5 ohm (TBD).
13.1.7.5 Checking the Reverse Valve (RV).
Running in heating mode, check the voltage between two pins of reverse valve connector, normal
voltage is 220VAC.
13.1.7.6 Checking the electrical expansion valve (EEV).
The EEV has two parts, drive part and valve. The drive part is a step motor; it is ringed on the valve.
Check the drive voltage (12VDC). When Outdoor unit is power on, EEV shall run and have click and
vibration.
13-8
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13.1.8 Precaution, Advise and Notice Items
13.1.8.1 High voltage in Outdoor unit controller.
Whole controller, including the wires that are connected to the Outdoor unit controller may have
the potential hazard voltage when power is on. Touching the Outdoor unit controller may cause an
electrical shock.
Advise: Don’t touch the naked lead wire and don’t insert finger, conductor or anything else into the
controller when power is on.
13.1.9 Charged Capacitors
Three large-capacity electrolytic capacitors are used in the Outdoor unit controller. Therefore, charging
voltage (380VDC) remains after power down. Discharging takes about four minutes after power is
off. Touching the Outdoor unit controller before discharging may cause an electrical shock.
13.1.10 Additional advises
When disassemble the controller or the front panel, turn off the power supply.
When connecting or disconnecting the connectors on the PCB, hold the whole housing, don’t pull
the wire.
There are sharp fringes and sting on shell. Use gloves when disassemble the A/C units.
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13.2 Troubleshooting for DCI 72 / 80
WARNING!!!
When Power Up – the whole outdoor unit controller, including the wiring, is under
HIGH VOLTAGE!!!
Never open the Outdoor unit before turning off the Power!!!
When turned off, the system is still charged (400V)!!!
It takes about 1 Min. to discharge the system.
Touching the controller before discharging may cause an electrical shock!!!
13.2.1 General System Failures and Corrective Actions
NoSymptom Probable CauseCorrective Action
Check power supply. If OK,
Indoor unit power supply indicator
1
(Red LED) does not light up.
No power supply
check display and display
wiring. if OK, replace
controller
Indoor unit does not respond to
2
remote control message
Indoor unit responds to remote
control message but Operate
3
indicator (Green LED) does not
light up
Indoor fan does not start (louvers
are opened and Green LED is
4
ON)
Remote control
message not reached
the indoor unit
Problem with display
PCB
Unit in heat mode and
coil is still not warm
Outdoor unit is in
opposite mode
Problem with controller
or capacitor
Check remote control
batteries, if OK, check
display and display wiring,
if OK, replace display
PCB. If still not OK replace
controller
Replace display PCB.
If still not OK replace
controller
Change to cool mode
Change operation mode
Change to high speed
and Check power supply
to motor is higher than
130VAC (for triack
controlled motor) or higher
than 220VAC for fixed
speed motors, if OK replace
capacitor, if not OK replace
controller
5
6
13-10
Indoor fan works when unit is
OFF, and indoor fan speed is
not changed by remote control
command.
Water leakage from indoor unit
Controller problemReplace controller
Indoor unit drainage
tube is blocked
Check and open drainage
tube
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NoSymptom Probable CauseCorrective Action
Check the connections
Outdoor unit display board and
7
leds are off
Compressor operates but no
8
capacity
Compressor is over heated and
9
unit does not generate capacity
No power supply
PFC Chock coil Check the PFC Chock coil
Burnt fuseCheck 20A fuse on the Filter
EEV problemCheck EEV
Refrigerant leakageCheck refrigeration system
and the wiring on the main
terminal - Repair if needed.
Clean filters and/or remove
block
Remove block and/or avoid
air by-pass
Clean filters and/or remove
block
Remove block and/or avoid
air by-pass
Compressor stops during
10
operation
Unit is not operating
11
Compressor does not start
12
Unit works in wrong mode (cool
instead of heat or heat instead of
13
cool)
All components are operating
properly but no cooling or no
14
heating
Compressor motor is generating
15
noise and no suction occurs
Freezing of outdoor unit in heat
mode and outdoor unit base is
16
blocked with ice
The unit stop suddenly during
17
operation
Indoor unit(s) Indicator(s) leds
18
may flicker
Electronic controlCheck diagnostics
Refrigerant leakageCheck refrigeration system
Communication
problems
Electronics control
problem or protection
Electronics or RV
problem
Refrigerant leakCheck refrigeration system
Phase order to
compressor is wrong
EMC interference to the
A/C unit
Check diagnostics
Check RV
Check compressor phase
order
Connect base heater
Check for EMC problems
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NoSymptom Probable CauseCorrective Action
Other home appliances operation
is faulty such as noise appears
in the television picture, or the
21
picture is distorted or static occurs
in the radio sound
EMC interference by
the A/C unit
Check for EMC problems
22
All others
Specific problems of
indoor or outdoor units
Check diagnostics
13.2.2 Checking the refrigeration system
Checking system pressures and other thermodynamic measures should be done when system is
in technician Mode where the system operates as in fixed settings. The performance curves given
in this manual are given for unit performance in Technician mode when high indoor fan speed is
selected.
13.2.3 Diagnostics
13.2.3.1 Outdoor unit diagnostics
If any fault exists in the system, it will be shown according to tIf no fault exists in the system, no
fault code will be displayed during normal operation mode, and the status led will be on while the
compressor is enable.he following coding method.
Two LEDs display the system diagnostics on real time as follows:
STATUS LED is blinking 5 times in 5 seconds, and shut off for the next 5 seconds.
FAULT LED will blink during the same 5 seconds according to the following table:
13-12
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NoProblem54321
1OCT bad00001
2CTT bad00010
3HST bad00011
4OAT bad00100
5OMT bad00101
6RGT bad00110
7OFAN/Compressor Feedback Loss00111
8OFAN- IPM fault01000
9OFAN Lock01001
10OFAN- Vospd exceeded01010
11Compressor- IPM Fault01011
12Compressor Lock01100
13Compressor- Vospd exceeded01101
14Compressor- Foldback01110
15DC under voltage01111
16DC over voltage10000
17AC under voltage 10001
18No communication A10010
19reserved10011
20reserved10100
21reserved10101
22Compressor- Ilegal Speed10110
23System Configuration Changed10111
24System Configuration Problem11000
25Heat sink Over Heating Fault/Protection11001
26Deicing Protection11010
27Compressor Over Heating Protection11011
28System over power Protection11100
29Bad EEPROM11101
30Not Configured11110
31Bad Communication11111
Notes:
1 - ON, 0 - OFF
Whenever this table is updated, the installation test procedure, and the alarm output function should
be updated.
Only one code is shown.
Order of priority is 1-32. Diagnostics is continuously ON as long as power is on.
Heat Sink Over Heating Protection, Compressor Over Heating Protection, and System Over Power
Protection are declared only whenever in ‘Stop-Compressor’ status.
All faults, except the thermistor faults, will remain at least 10 seconds. This rule comes to serve the
monitoring utilities, in a case the fault is released quickly it will be still shown under the monitoring
utilities.
Thermistor faults are reported only when they are enabled.
When the outdoor unit is in fault (not protection), an in-fault signal is sent to the indoor. When all the
outdoor unit faults are cleared, ‘no-fault’ signal is sent to the indoor.
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13.2.3.2 Outdoor fault corrective actions
NoFault NameProbable CauseCorrective Action
1OCT bad
2CTT bad
3HST bad
4OAT bad
5TSUC bad
6RGT bad
Thermistor not connected or
damaged
Check Thermistor
OFAN/Compressor
7
Feedback Loss
8OFAN - IPM fault
9OFAN LockFan does not rotateCheck OFAN motor
OFAN- Vospd
10
exceeded
Compressor- IPM
11
Fault
12Compressor LockCompressor does not rotateCheck Compressor
Compressor- Vospd
13
exceeded
OFAN halls or wires bad.
Compressor wire cable bad or
IPM bad or compressor bad
Over current / Over temperature
of OFAN IPM
Exceeds speed high limit
Over current / Over temperature
of compressor IPM
Exceeds speed limit
Check OFAN motor and
compressor
Check no obstruction to
controller air opening
Check OFAN motor
Check motor type matches
motor jumpers in controller
Check motor type matches
motor jumpers in controller
Make necessary arrengments
in unit installation location to
avoid back wind
Avoid EMC problems
Check no obstruction to
controller air opening
Check Compressor
Try again and replace controller
if still have the problem
Compressor-
14
Foldback
15DC under voltageDC voltage is lower than limitReplace controller
16DC over voltage
17AC under voltage
13-14
High pressure / Current reduces
compressor speed
DC voltage exceeds its high
limit
AC input voltage is lower than
limit
Check Compressor
Check if input voltage higher
than limit (270VAC), if not
and the problem presist,
replace controller. If voltage is
high, shut off the power and
recommend the customer to fix
the power supply
Check if input voltage lower
than limit (170VAC), if not and
the problem presist, replace
controller. If voltage is low,
recommend the customer to fix
the power supply
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NoFault NameProbable CauseCorrective Action
18No communication ANo signals in line ACheck communication
Miss-match between the IDUs
connected to port A,B,C or D,
or the total capacity code of
IDUs is higher than the ODU
maximum capacity code
Compressor stopped due to
heatsink protection
Compressor stopped due to
over heat protection
Compressor stopped due to
over power protection
No problem just an
announcement
Change configuration if
needed.
Check that the airflow around
the ODU is free and the fan is
running free. Check fan motor
(0)
Check if gas is missing in the
system
No action required
Power reset. (Replace
Controller just in case you need
EEPROM).
27Not ConfiguredCannot start the control
28Bad CommunicationBad communication linesSee # 18-21
Power reset. Replace
Controller if didn’t help
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13.2.4 Fault Code for Indoor unit
Pressing Mode button for long will activate diagnostic mode by the acknowledgment of 3 short beeps
and lighting of COOL and HEAT LED’s.
Entering diagnostics in STBY mode allows only viewing of status (fault-display).
In diagnostic mode, system problems / information will be indicated by blinking of Heat & Cool
LED’s.
The coding method will be as follows:
Heat led will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds. Cool Led will
blink during the same 5 seconds according to the following table:
NoFault Name54321
1RT-1 is disconnected00001
2RT-1 is shorted00010
3RT-2 is disconnected00011
4RT-2 is shorted00100
9No Encoder01001
10Reserved01010
11Outdoor Unit Fault01011
…Reserved
17Defrost protection10001
18Deicing Protection10010
19Outdoor Unit Protection10011
20Indoor Coil HP Protection10100
21Overflow Protection10101
…Reserved
24EEPROM Not Updated11000
25Bad EEPROM11001
26Bad Communication11010
27Using EEPROM data11011
28Model A11100
29Model B11101
30Model C 11110
31Model D11111
1 - ON, 0 - OFF
Only one code is shown. Order of priority is lower to the higher number. Diagnostics is continuously
ON as long power is on.
13-16
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13.2.4.1 Indoor unit diagnostics and corrective actions
CONTENTS
TROUBLESHOOTING
No.
1-4Sensor failures
Communication
7
mismatch
8No Communication
9No EncoderIndoor electronics or motor
11Outdoor Unit FaultOutdoor controller problem
17-21ProtectionsIndicationNo action
24
25Bad EEPROM
EEPROM Not
Updated
FaultProbable CauseCorrective Action
Sensors not connected or
damaged
Indoor and Outdoor controllers
are with different versions
Communication or grounding
wiring is not good
System is using ROM
parameters and not EEPROM
parameters
Check sensor connections
or replace sensor
Replace Indoor controller
Check Indoor to Outdoor
wiring and grounding
Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
Switch to Outdoor
diagnostics.
No action, unless special
parameters are required for
unit operation.
No action, unless special
parameters are required for
unit operation.
26Bad Communication
27Using EEPROM dataNo problem
28-31IDU model
Communication quality is low
reliability
Check Indoor to Outdoor
wiring and grounding
13.2.5 Procedures for checking Main Parts
13.2.5.1 Checking Mains Voltage
Confirm that the Mains voltage is between 198 and 264 VAC. If Mains voltage is out of this range,
abnormal operation of the system is expected. If in range check the Power (Circuit) Breaker and look
for broken or loosed cable lugs or wiring mistake(s).
13.2.5.2 Checking Main fuse
Check 20A fuse on the Filter Board - If burnt – check the compressor, fan or any other peripheral that
can cause a short. In case of a problematic peripheral - replace it.
In case no problematic peripheral, check the resistance on the DC bank (B+ & B- on the Power
board), if it is less than 30Ω, replace the controller. Otherwise replace the burnt fuse. In case of
frequent burning fuse, replace the controller.
13.2.5.3 Checking PFC Chock coil
Check PFC chock connection – repair if needed.
Dis-connect the chock from the controller wire extensions, check if the 2 wires of the chock are
shorted. If shorted (OK) check between each wire and the metal box. If shorted replace chock, if
not (OK), open the controller top cover and check if the wire extensions are connected well and if
shorted. If not shorted, replace wires, if shorted (OK) than might be a controller problem – replace
controller.
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13.2.5.4 Checking the Outdoor Fan Motor
Check FAN-Power and FAN-Halls connections - Repair if needed.
Rotate the fan slowly by hand. If the fan does not rotate easily, check whether something is obstructing
the fan, or if the fan itself is coming into contact with the outer case, preventing it from rotating.
Correct if necessary - otherwise, the fan motor bearings have seized. Replace the motor.
If the fan rotates easily, use a current probe (“Clamp”) to assure AC current on each phase and it is
less than 1A.
In case there is no current, check the resistance between the three poles. Assure the three coil
resistances are almost the same.
The normal value should be between 10Ω to 20Ω.
Change to Stand-by or Power OFF and re-start - If the fault is still active - replace controller.
13.2.5.5 Checking the Compressor
Check Compressor connections - Repair if needed.
Use a current probe (“Clamp”) to assure that there is an AC current on each phase – no more than
15A.
In case there is no current, check the resistance between the three poles. Assure the three coil
resistances are almost the same (between 0.8Ω to 1.5Ω).
Change to Stand-by or Power OFF and re-start - If the fault is still “Active” - replace controller.
13.2.5.6 Checking the Reverse Valve (RV)
The RV has two parts, Solonoid and valve.
Solonoid - Running in heating mode, check the voltage between two pins of reverse valve connector,
normal voltage is 230VAC. if no power supply to RV, Check RV operation with direct 230VAC power
supply, if OK, replace outdoor controller.
Valve - if RV solonoid is OK (as above) but still no heating operation while compressor is On, replace
the valve.
13.2.5.7 Checking the electrical expansion valve (EEV)
The EEV has two parts, drive and valve.
When Outdoor unit is powered on, EEV shall run and have click and vibration.
For assuring the problem is of the EEV parts, perform the installation test and if fails and no other
indications in the diagnostics, than the problem is with the EEV (one or more).
Drive - a step motor; ringed on the valve. Check the drive voltage, should be12VDC.
Valve – if drive is OK (as above) but still the indoor unit perform no conditioning replace the valve (no
need to take out the refrigerant, just pump down and shut off the main valves).
13.2.5.8 Checking the termistors
Check Thermistor connections and wiring - Repair if needed.
Check Thermistor resistance – between 0ºC and 40ºC should be between 35KΩ and 5KΩ.
13.2.5.9 Checking the communication
Change to Stand-by or Power OFF and re-start - If the fault is still “Active” check Indoor to Outdoor.
Communication wiring and grounding connections (should be less than 2.0Ω) - Repair if needed.
If IDU failure – replace IDU controller that does not respond.
If ODU failure – replace ODU.
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13.2.5.10 Checking for electromagnetic interferance (EMC problems)
EMC troubles to the A/C unit
Locations most susceptible to noise :
1. Locations near broadcast stations where there are strong electromagnetic waves.
2. Locations near amateur radio (short wave) stations.
3. Locations near electronic sewing machines and arc-welding machines.
Trouble :
Either of the following trouble may occur:
1. The unit may stop suddenly during operation.
2. Indicator lamps may flicker
Correction :
The fundamental concept is to make the system less susceptible to noise
(insulate for noise or distance from the noise source):
1. Use shielded wires.
2. Move unit away from the noise source.
13.2.5.11 EMC troubles to near by home appliances
Locations most susceptible to noise :
1. A television or radio is located near the A/C and A/C wiring.
2. The antenna cable for a television or radio is located close to the A/C and A/C wiring.
3. Locations where television and radio signals are weak.
Trouble :
1. Noise appears in the television picture, or the picture is distorted.
2. Static occurs in the radio sound.
Correction
1. Select a separate power source.
2. Keep the A/C and A/C wiring at least 1 meter away from wireless devices and antenna
cables.
3. Change the wireless device’s antenna to a high sensitivity antenna.
4. Change the antenna cable to a BS coaxial cable.
5. Use a noise filter (for the wireless device).
6. Use a signal booster.
13.2.6 Precaution, Advise and Notice Items
13.2.6.1 High voltage in Outdoor unit controller
Whole controller, including the wires, connected to the Outdoor unit controller may have the potential
hazard voltage when power is on. Touching the Outdoor unit controller may cause an electrical
shock.
Advise: Don’t touch the naked lead wire and don’t insert finger, conductor or anything else into the
controller when power is on.
13.2.6.2 Charged Capacitors
Three large-capacity electrolytic capacitors are used in the Outdoor unit controller. Therefore,
charging voltage (380VDC) remains after power down. Discharging takes about one minute after
turned off. Touching the Outdoor unit controller before discharging may cause an electrical shock.
When open the Outdoor unit controller cover, don’t touch the soldering pin by hand or by any
conductive material.
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13.2.6.3 Advise:
Open the Outdoor unit controller cover only after one minute from power off.
Measure the electrolytic capacitors voltage before farther checking controller.
Additional advises
When disassemble the controller or the front panel, turn off the power supply.
When connecting or disconnecting the connectors on the PCB, hold the whole housing, don’t pull the
wire, there are sharp fringes and sting on shell. Use gloves when disassemble the A/C units.
104518664Drain hose 1
11452917300Air outlet 1
12453050200STEP MOTOR A 1
13452918700Support/horizontal louver 2
14452917500Horizontal flap A 1
14452917600Horizontal flap B 1
16452918500Linkage A 1
452918600Linkage B 1
17452930700Vertical flap A 12
452918200Vertical flap B 2
18452918300Tie/vertical flap A 1
452918400Vertical flap stator B 2
452953000Vertical flap stator C 1
194518662Bearing assy fan 1
20453024900Impeller fan 1
21453053800Base assy./WNG18 1
224518657TUBE LOCK 1
23452920100Mount bracket/WNG-18 20 1
24452919400Joint/Unit housing 1
25453024500PG Motor 1
264518651Cover Side Motor 1
27452918800Cover/motor 1
28453042500Remote controller/RC4-I-1 EHK P/N 974-710-00 1
29453050300STEP MOTOR B 1
30453057900Gear BOX ASSY 1
31453109300Wire UL100726AWG/Ionizer 1
32433134IONIZER POWER 906-191-01 (Optional) 1
334517022Plug 1
344524967IONIZER WIRE A (Optional) 1
35453030600Indoor DC Inverter Controller(ENGLISH)916-513-00 1
364524963Electrostatic Filter (Optional) 1
37452919500Cover/terminal 1
14-2
SM WNGDCI 2-E.4 GB
Page 93
EXPLODED VIEWS AND SPARE PARTS LISTS
CONTENTS
14.3 Outdoor Unit: ONG3-50 DCI
SM WNGDCI 2-E.4 GB
14-3
Page 94
EXPLODED VIEWS AND SPARE PARTS LISTS
CONTENTS
14.4 Outdoor Unit: ONG3-50 DCI
ItemNo. Part No. Description Qty
1433218Front panel A 1
24526340Air inlet ring-420 1
3433223Painting insulation plate 1
44526476Axial fan OD=401 1
54526475DC motor for DCI 50 1
64526457Motor support 1
74527363Base painting Assy. 1
84526459Partition 1