Page 1
Service Manual
WNG LED/LCD DCI Inverter Series
REFRIGERANT
R410A
HEAT PUMP
NOVEMBER – 2005
Indoor Units Outdoor Units
WNG 50 DCI DCI 50
WNG 60 DCI DCI 60
WNG 80 DCI DCI 80
Page 2
A
LIST OF EFFECTIVE PAGES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
LIST OF EFFECTIVE PAGES
Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page
(when none indicates no changes in the relevant page). All pages in the following list represent
effected/ non effected pages divided by chapters.
Dates of issue for original and changed pages are:
Original ....... 0 ........ April 2005
Total number of pages in this publication is 107 consisting of the following:
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Title ....................... 1
A ........................... 1
i ............................. 1
1-1 - 1-4 ................ 1
2-1 - 2-3 ................ 1
3-1 ........................ 1
4-1 - 4-3 ................ 1
5-1 - 5-13 .............. 1
6-1 - 6-4 ................ 1
7-1 ........................ 1
8-1-8-2 .................. 1
9-1-9-2 .................. 1
10-1 ...................... 1
11-1-11-19 ............. 2
12-1-12-6 .............. 1
13-1-13-6 .............. 2
14-1-14-6 .............. 1
15-1-15-10 ............ 2
Appendix -A ...........1
• Zero in this column indicates an original page.
*Due to constant improvements please note that the data on this service manual can be modified
with out notice.
**Photos are not contractual
Page 3
i
TABLE OF CONTENTS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
Table of Contents
1. INTRODUCTION WNG 50/60/80 ...........................................................................1-1
2. PRODUCT DATA SHEET WNG 50/60/80 .............................................................2-1
3. RATING CONDITIONS WNG 50/60/80 .................................................................3-1
4. OUTLINE DIMENSIONS WNG 50/60/80 ...............................................................4-1
5. PERFORMANCE DATA & PRESSURE CURVES WNG 50/60/80 ......................5-1
6. SOUND LEVEL CHARACTERISTICS WNG 50/60/80 .........................................6-1
7. ELECTRICAL DATA WNG 50/60/80 .....................................................................7-1
8. WIRING DIAGRAMS WNG 50/60/80 ....................................................................8-1
9. REFRIGERATION DIAGRAMS WNG 50/60/80 ....................................................9-1
10. TUBING CONNECTIONS WNG 50/60/80 .............................................................10-1
11. CONTROL SYSTEM WNG 50/60 ..........................................................................11-1
12. CONTROL SYSTEM WNG 80 ...............................................................................12-1
13. TROUBLESHOOTING WNG 50/60 .......................................................................13-1
14. TROUBLESHOOTING WNG 80 ............................................................................14-1
15. EXPLODED VIEWS AND SPARE PARTS LISTS WNG 50/60/80 ........................15-1
16. APPENDIX A WNG 50/60/80 ................................................................................16-1
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1-1
INTRODUCTION
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
1. INTRODUCTION
1.1 General
The new WNG DCI INVENTER split wall mounted range has expanded, comprising
two additional RC(heat pump) models:
● WNG50
● WNG60
● WNG80
The indoor WNG units are available as LED or LCD display types, featuring esthetic
design, compact dimensions, and low noise operation.
1.2 Main Features
The WNG DCI series benefits from the most advanced technological innovations,
namely:
● DC inverter technolegy.
● R410A.
● High COP.
● Pre-Charged units up to the max’ allowing tubing distance.
● Networking system connectivity.
● A dry contact for clock or power shedding functions (configurable).
● Base heater connection.
● Cooling operation at outdoor temperature down to -10°C.
● Heating operation at outdoor temperature down to -15°C.
● Supports Indoor Air Quality features, such as – Ionizer, Active Electro-
Static Filter.
● Indoor large diameter cross flow fan, allowing low noise level operation.
● 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.
● 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.
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INTRODUCTION
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
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:
Feature WNG 50 WNG60 WNG80
Display LCD or LED LCD
Ionizer YES
ESF YES
Fresh air YES NO
Indoor fan motor Variable speed (PG)
Horizontal motorized louver YES
Vertical motorized louver YES
Heating element NO
M2L Cable port YES
Dry contact Presence 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, provide complete operating function and programming.
Remote controlers: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.
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INTRODUCTION
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
1.7 Outdoor Unit
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 by anti- 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
Feature DCI 50 DCI 60 DCI 80
Display 3 LED’s
Base Heater Optional
Outdoor Fan Variable speed DC Inverter
M2L cable Port No Yes
Night No Yes
STBY No Yes
Power Shedding No Yes
Alarm No Yes
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
Item Description
MIU(WNG) MODBUS interface unit
RS485 Adapter
To be used as an interface
with RCW or µBMS remote
controllers
Base Heater
M2L cable Port
1.10 Inbox Documentation
Each unit is supplied with its own installation and operation manuals.
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INTRODUCTION
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
1.11 Matching Table
1.11.1 R410A
OUTDOOR UNITS
INDOOR UNITS
MODEL REFR” WNG50 DCI WNG60 DCI WNG80 DCI
DCI 50 R410A √
DCI 60 R410A
√
DCI 80 R410A √
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2-1
PRODUCT DATA SHEET
Revision Y05-02Service Manual - WNG 50_60_80 DCI
(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. PRODUCT DATA SHEET
2.1 WNG50 DCI
Model Indoor Unit WNG 50
Model Outdoor Unit DCI 50
Installation Method of Pipe Flared
Characteristics Units Cooling Heating
Capacity
(1)
Btu/hr 17060(5120-20470) 20470(5120-25930)
kW 5.00(1.50-6.00) 6.00(1.50-7.60)
Power input
(1)
kW 1.46(0.50-2.00) 1.66(0.45-2.20)
EER (Cooling) or COP(Heating)
(1)
W/W 3.42 3.61
Energy efficiency class AA
Power supply V/Ph/Hz 220-240V/Single/50Hz
Rated current A 6.6 7.5
Starting current A 10.5
Circuit breaker rating A 20
INDOOR
Fan type & quantity Crossflow x 1
Fan speeds H/M/L RPM 1200/1050/900
Air flow
(2)
H/M/L m3/hr 850/760/620
External static pressure Min-Max Pa 0
Sound power level
(3)
H/M/L dB(A) 55/51/47
Sound pressure level
(4)
H/M/L dB(A) 43/39/34
Moisture removal l/hr 2
Condenstate drain tube I.D mm 16
Dimensions WxHxD mm 1060x295x210
Weight kg 15
Package dimensions WxHxD mm 1125x360x280
Packaged weight kg 18
Units per pallet units 16 units per pallet
Stacking height units 8 levels
OUTDOOR
Refrigerant control EEV
Compressor type,model Scroll,Panasonic 5CS130XCC03
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 920
Air flow H/L m3/hr 2160
Sound power level H/L dB(A) 63
Sound pressure level
(4)
H/L dB(A) 53
Dimensions WxHxD mm 795x610x290
Weight kg 39
Package dimensions WxHxD mm 945x655x395
Packaged weight kg 43
Units per pallet Units 9 units per pallet
Stacking height units 3 levels
Refrigerant type R410A
Refrigerant chargless distance kg/m 1.50/7.5
Additional charge per 1 meter g/m No need
Connections between units
Liquid line In.(mm) 1/4”(6.35)
Suction line In.(mm) 1/2”(12.7)
Max.tubing length m. Max.30
Max.height difference m. Max. 10
Operation control type Remote control
Heating elements kW
Others
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PRODUCT DATA SHEET
Revision Y05-02 Service Manual - WNG 50_60_80 DCI
(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 WNG60 DCI
Model Indoor Unit WNG-60
Model Outdoor Unit DCI60
Installation Method of Pipe Flared
Characteristics Units Cooling Heating
Capacity
(1)
Btu/hr 20470(5120-22860) 22180(5120-26950)
kW 6.00(1.50-6.70) 6.50(1.80-7.90)
Power input
(1)
kW 1.99(0.50-2.20) 1.90(0.45-2.30)
EER (Cooling) or COP(Heating)
(1)
W/W 3.02 3.42
Energy efficiency class B B
Power supply V/Ph/Hz 220-240V/Single/50Hz
Rated current A 8.9 8.6
Starting current A 10.5
Circuit breaker rating A 20
INDOOR
Fan type & quantity Crossflow x 1
Fan speeds H/M/L RPM 1250/1100/1000
Air flow
(2)
H/M/L m3/hr 900/760/620
External static pressure Min-Max Pa 0
Sound power level
(3)
H/M/L dB(A) 56/53/48
Sound pressure level
(4)
H/M/L dB(A) 45/40/34
Moisture removal l/hr 2
Condenstate drain tube I.D mm 16
Dimensions WxHxD mm 1060x295x210
Weight kg 15
Package dimensions WxHxD mm 1125x360x280
Packaged weight kg 18
Units per pallet units 16 units per pallet
Stacking height units 8 levels
OUTDOOR
Refrigerant control EEV
Compressor type,model Scroll,Panasonic 5CS130XCC03
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 820
Air flow H/L m3/hr 2860
Sound power level H/L dB(A) 65
Sound pressure level
(4)
H/L dB(A) 55
Dimensions WxHxD mm 846x690x302
Weight kg 46
Package dimensions WxHxD mm 990x770x430
Packaged weight kg 50
Units per pallet Units 9 units per pallet
Stacking height units 3 levels
Refrigerant type R410A
Refrigerant chargless distance kg/m 1.65/7.5
Additional charge per 1 meter g/m No need
Connections between units
Liquid line In.(mm) 1/4”(6.35)
Suction line In.(mm) 1/2”(12.7)
Max.tubing
length
m. Max.30
Max.height
difference
m. Max. 10
Operation control type Remote control
Heating elements kW
Others
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PRODUCT DATA SHEET
Revision Y05-02Service Manual - WNG 50_60_80 DCI
2.3 WNG80 DCI
Model Indoor Unit WNG- 80
Model Outdoor Unit DCI 80
Installation Method of Pipe Flared
Characteristics Units Cooling Heating
Capacity
(1)
Btu/hr 26620(5100~30035) 29010 (5100~32420)
kW 7.8 (1.50~8.8) 8.5 (1.5~9.5)
Power input
(1)
kW 2.59 (0.50~3.1) 2.65 (0.5~3.2)
EER (Cooling) or COP(Heating)
(1)
W/W 3.01 3.21
Energy efficiency class B C
Power supply V/Ph/Hz 220-240V/Single/50Hz
Rated current A 11.3 11.5
Starting current A 15
Circuit breaker rating A 20
INDOOR
Fan type & quantity Crossflow x 1
Fan speeds H/M/L RPM 1350/1150/1000 1350/1200/1050
Air flow
(2)
H/M/L m3/hr 1250/1050/900 1250/1100/950
External static pressure Min-Max Pa N/A
Sound power level
(3)
H/M/L dB(A) 66/61/57
Sound pressure level
(4)
H/M/L dB(A) 51/48/44
Moisture removal l/hr 3
Condensate drain tube I.D mm 16
Dimensions WxHxD mm 1200x340x236
Weight kg 18.5
Package dimensions WxHxD mm 1305x430x325
Packaged weight kg 24
Units per pallet units 12 units per pallet
Stacking height units 6 levels
OUTDOOR
Refrigerant control EEV
Compressor type, model Twin Rotary DC Inverter Mitsubishi TNB220F
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 850
Air flow H/L m3/hr 3600
Sound power level
(3)
H/L dB(A) 66
Sound pressure level
(4)
H/L dB(A) 56
Dimensions WxHxD mm 950x412x835
Weight kg 66
Package dimensions WxHxD mm 1080x477x910
Packaged weight kg 73.5
Units per pallet Units 2 units per pallet
Stacking height units 3 levels
Refrigerant type R410A
Refrigerant chargless distance kg/m 2.75/7.5
Additional charge per 1 meter g/m No need
Connections between units
Liquid line In.(mm) 3/8”(9.53)
Suction line In.(mm) 5/8”(15.88)
Max. tubing length m. Max.30
Max. height
difference
m. Max. 15
Operation control type Remote control
Heating elements 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.
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3-1
RATING CONDITIONS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
3. RATING CONDITIONS
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
Indoor Outdoor
Cooling
Upper limit
32oC DB 23oC WB 46oC DB
Lower limit
21oC DB 15oC WB -10oC DB
Heating
Upper limit
27oC DB 24oC DB 18oC WB
Lower limit
10oC DB -15oC DB -16oC WB
Volta g e
198 – 264 V
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OUTLINE DIMENSIONS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
4. OUTLINE DIMENSIONS
4.1 Indoor Unit: WNG 50/60 DCI
4.2
Outdoor Unit: DCI 50
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OUTLINE DIMENSIONS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
4.3 Outdoor Unit: DCI 60
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4-3
OUTLINE DIMENSIONS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
4.4 Indoor Unit: WNG 80
4.4 Outdoor Unit: DCI 80
80
45
340
157.5
187.5
90
261.5
390
10
450
1200
180
R20
187
45
395
85
34
AIR INTAKE
AIR OUTLET
AIR INTAKE
340
236
1200
TUBING WALL OPENING
(FOR REAR LEFT ROUTING)
TUBING WALL OPENING
(FOR REAR ROUTING)
150mm MIN
CEILING
MOUTING PLATE OUTLINE
MOUNTING TEMPLATE
TO BE USED FOR LOCATION
OF INDOOR UNIT ON THE WALL
INDOOR UNIT OUTLINE
624
570
570
204
AIR INTAKE
AIR OUTLET
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5-1
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5. PERFORMANCE DATA
5.1 WNG 50 DCI
5.1.1 Cooling Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.
ID COIL ENTERING AIR DB/WB TEMPERATURE [0C]
OD COIL
ENTERING AIR DB
TEMPERATURE
[0C]
DATA
22/15 24/17 27/19 29/21 32/23
-10 - 20
(protection range)
TC 80 - 110 % of nominal
SC 80 - 105 % of nominal
PI 25 - 50 % of nominal
25
TC 4.93 5.22 5.51 5.80 6.09
SC 4.10 4.16 4.22 4.28 4.34
PI 1.10 1.13 1.15 1.18 1.20
30
TC 4.67 4.96 5.25 5.54 5.83
SC 3.94 4.00 4.06 4.12 4.18
PI 1.26 1.28
1.31
1.33 1.36
35
TC 4.42 4.71
5.00
5.29 5.58
SC 3.78 3.84 3.90 3.96 4.02
PI 1.41 1.44
1.46
1.48 1.51
40
TC 4.17 4.46
4.75
5.04 5.53
SC 3.62 3.68 3.74 3.80 3.86
PI 1.56 1.59 1.61 1.64 1.66
46
TC 3.86 4.15 4.44 4.73 5.02
SC 3.43 3.49 3.55 3.61 3.67
PI 1.75 1.77 1.80 1.82 1.85
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
5.1.2 Capacity Correction Factors
Cool in g Ca pacity Ra ti o V s. Outd oor Te m pe ra tu re
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
20 25 30 35 40 45
Outdoor DB Temperature [ºC]
Capaci ty Ration
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PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
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]
DATA 15 20 25
-15/-16
TC 2.73 2.34 1.94
PI 1.16 1.24 1.33
-10/-12
TC 3.60 3.21 2.82
PI 1.31 1.40 1.48
-7/-8
TC 4.26 3.87 3.47
PI 1.43 1.51 1.59
-1/-2
TC 4.59 4.19 3.80
PI 1.48 1.57 1.65
2/1
TC 4.81 4.41 4.02
PI 1.52
1.60
1.69
7/6
TC 6.39
6.00
5.61
PI 1.58
1.66
1.74
10/9
TC 6.72
6.33
5.94
PI 1.61 1.69 1.77
15/12
TC 7.06 6.66 6.27
PI 1.64 1.72 1.80
15-24
TC 85 - 105 % of nominal
(Protection Range)
PI 80 - 120 % of nominal
LEGEND
TC – Total Cooling Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor
5.1.4 Capacity Correction Factors
Hea ting Ca pa ci ty Ratio Vs. Outdo or Tem pe ra ture
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
-15 -10 -5 0 5 10 15
Outdoor WB Tempe rature [ºC]
Capaci ty Rati on
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PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.2 WNG 60 DCI
5.2.1 Cooling Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.
ID COIL ENTERING AIR DB/WB TEMPERATURE [0C]
OD COIL
ENTERING AIR DB
TEMPERATURE [0C]
DATA
22/15 24/17 27/19 29/21 32/23
-10 - 20
(protection range)
TC 80 - 110 % of nominal
SC 80 - 105 % of nominal
PI 25 - 50 % of nominal
25
TC 5.91 6.26 6.61 6.95 7.30
SC 4.64 4.71 4.78 4.85 4.92
PI 1.50 1.54 1.57 1.61 1.64
30
TC 5.61 5.96 6.30 6.65 7.00
SC 4.46 4.53 4.60 4.67 4.74
PI 1.71 1.75
1.78
1.81 1.85
35
TC 5.30 5.65
6.00
6.35 6.70
SC 4.28 4.35 4.42 4.49 4.56
PI 1.92 1.96
1.99
2.02 2.06
40
(Protection Range)
TC 5.00 5.35
5.70
6.05 6.39
SC 4.10 4.17 4.24 4.31 4.38
PI 2.13 2.17 2.20 2.23 2.27
46
(Protection Range)
TC 4.64 4.99 5.33 5.68 6.03
SC 3.88 3.95 4.02 4.09 4.16
PI 2.38 2.42 2.45 2.48 2.52
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
5.2.2 Capacity Correction Factors
Cool ing Ca pa ci ty Ra tio Vs. Ou tdoo r Te m pe ra tur e
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
20 25 30 35 40 45
Outdoor DB Temperature [ºC]
Capaci ty Ratio n
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PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.2.3 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]
DATA
15 20 25
-15/-16
TC 2.96 2.53 2.11
PI 1.33 1.42 1.52
-10/-12
TC 3.90 3.48 3.05
PI 1.50 1.60 1.69
-7/-8
TC 4.61 4.19 3.76
PI 1.63 1.73 1.82
-1/-2
TC 4.97 4.54 4.12
PI 1.70 1.79 1.82
2/1
TC 5.21 4.78 4.35
PI 1.74
1.84
1.93
7/6
TC 6.93
6.50
6.07
PI 1.81
1.90
2.00
10/9
TC 7.28
6.86
6.43
PI 1.84 1.93 2.03
15/12
TC 7.64 7.22 6.79
PI 1.87 1.97 2.06
15-24
TC 85 - 105 % of nominal
(Protection Range)
PI 80 - 120 % of nominal
LEGEND
TC – Total Cooling Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor
5.2.4 Capacity Correction Factors
Heating Capa city Ratio Vs. Outdoor Tempera ture
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
-15 -10 -5 0 5 10 15
Outdoor WB Temperature [ºC]
Capacity Rati on
Page 19
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PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.3 WNG 80 DCI
5.3.1 Cooling Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.
ID COIL ENTERING AIR DB/WB TEMPERATURE [0C]
OD COIL
ENTERING AIR DB
TEMPERATURE [0C]
DATA
22/15 24/17 27/19 29/21 32/23
-10 - 20
(protection range)
TC 80 - 110 % of nominal
SC 80 - 105 % of nominal
PI 25 - 50 % of nominal
25
TC 7.68 8.14 8.59 9.04 9.49
SC 6.41 6.51 6.60 6.70 6.79
PI 1.96 2.00 2.05 2.09 2.13
30
TC 7.29 7.74 8.19 8.65 9.10
SC 6.16 6.25 6.35 6.45 6.54
PI 2.23 2.27
2.32
2.36 2.41
35
TC 6.90 7.35
7.80
8.25 8.70
SC 5.91 6.00 6.10 6.20 6.29
PI 2.50 2.55
2.59
2.63 2.68
40
(Protection Range)
TC 6.50 6.95
7.41
7.86 8.31
SC 5.66 5.75 5.85 5.95 6.04
PI 2.77 2.82 2.86 2.91 2.95
46
(Protection Range)
TC 6.03 6.48 6.93 7.39 7.84
SC 5.36 5.45 5.55 5.64 5.74
PI
3.10 3.14 3.19 3.23 3.28
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
5.3.2 Capacity Correction Factors
Cool ing Ca pa ci ty Ra tio Vs. Ou tdoo r Te m pe ra tur e
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
20 25 30 35 40 45
Outdoor DB Temperature [ºC]
Capaci ty Ratio n
Page 20
5-6
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.3.3 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]
DATA
15 20 25
-15/-16
TC 3.87 3.31 2.75
PI 1.85 1.99 2.12
-10/-12
TC 5.11 4.55 3.99
PI 2.09 2.23 2.36
-7/-8
TC 6.03 5.48 4.92
PI 2.28 2.41 2.54
-1/-2
TC 6.50 5.94 5.38
PI 2.37 2.50 2.63
2/1
TC 6.81 6.25 5.69
PI 2.43
2.56
2.69
7/6
TC 9.06
8.50
7.94
PI 2.52
2.65
2.78
10/9
TC 9.53
8.97
8.41
PI 2.57 2.70 2.83
15/12
TC 10.00 9.44 8.88
PI 2.61 2.75 2.88
15-24
TC 85 - 105 % of nominal
(Protection Range)
PI 80 - 120 % of nominal
LEGEND
TC – Total Cooling Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor
5.3.4 Capacity Correction Factors
Heating Capa city Ratio Vs. Outdoor Tempera ture
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
-15 -10 -5 0 5 10 15
Outdoor WB Temperature [ºC]
Capacity Rati on
Page 21
5-7
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.4 Capacity Correction Factor Due to Tubing Length
5.4.1 WNG 50/60/80 DCI: Cooling
5.4.2 Heating
0.86
0.88
0.90
0.92
0.94
0.96
0.98
1.00
1.02
4 6 8 101214161820 222426 2830
Tubing length(m)
Capacity ratio
0.84
0.86
0.88
0.90
0.92
0.94
0.96
0.98
1.00
1.02
4 6 8 101214161820222426 2830
Tubing Length(m)
Capaci ty ratio
Page 22
5-8
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.4.3 Pressure Curves
5.4.4. Model: WNG 50 DCI Cooling — Test Mode
Suction Pressure VS.Outdoor Temp.
500
600
700
800
900
1000
1100
10 15 20 25 30 35 40 45
Outdoor DB Temperature[ºC ]
Suction Pressure [kPa]
22/15
24/17
27/19
29/21
32/23
Indoor
DB/WB T e m p '
Discharge Pressure VS. Outdoor Temp.
1000
1500
2000
2500
3000
3500
4000
10 15 20 25 30 35 40 45
Outdoor DB Temperature[ºC ]
Discharge Pressure [kPa]
22/15
24/17
27/19
29/21
32/23
Indoor
DB/WB Te m p '
Page 23
5-9
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.4.5. Heating — Test Mode
Suction Pressure VS.Outdoor Temp.
200
300
400
500
600
700
800
900
1000
1100
-15 -10 -5 0 5 10 15
Outdoor WB Temperature[ºC ]
Suction Pressure [kPa]
15
20
25
Indoor DB
Discharge Pressure VS. Outdoor Temp.
1000
1500
2000
2500
3000
3500
4000
-15 -10 - 5 0 5 10 15
Outdoor WB Temperature
Discharge Pressure [kPa]
15
20
25
Indoor DB
Page 24
5-10
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.4.6 Model: WNG 60 DCI Cooling — Test Mode.
Suction Pressure VS.Outdoor Temp.
500
600
700
800
900
1000
1100
10 15 20 25 30 35 40 45
Outdoor DB Tempe rature[ºC ]
Suction Pressure [kPa]
22/15
24/17
27/19
29/21
32/23
Indoor
DB/WB T e m p '
Discharge Pressure VS. Outdoor Temp.
1000
1500
2000
2500
3000
3500
4000
10 15 20 25 30 35 40 45
Outdoor DB Tempe rature
Discharge Pressure [kPa]
22/15
24/17
27/19
29/21
32/23
Indoor
DB/WB T e m p '
Page 25
5-11
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.4.7 Heating — Test Mode
Suction Pressure VS.Outdoor Temp.
200
300
400
500
600
700
800
900
1000
1100
-15 - 10 -5 0 5 10 15
Outdoor WB Temperature[ºC ]
Suction Pressure [kPa]
15
20
25
Indoor DB
Discharge Pressure VS. Outdoor Temp.
1000
1500
2000
2500
3000
3500
4000
-15 - 10 -5 0 5 10 15
Outdoor WB Temperature [ºC ]
Discharge Pressure [kPa]
15
20
25
Indoor DB
Page 26
5-12
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.4.8 Model: WNG 80 DCI Cooling — Test Mode.
Suction Pressure VS.Outdoor Temp.
600
700
800
900
1000
1100
10 15 20 25 30 35 40 45
Outdoor DB Tempe rature[ºC ]
Suction Pressure [kPa]
22/15
24/17
27/19
29/21
32/23
Indoor
DB/W B T e m p '
Discharge Pressure VS. Outdoor Temp.
1000
1500
2000
2500
3000
3500
4000
10 15 20 25 30 35 40 45
Outdoor DB Tempe rature[ºC ]
Discharge Pressure [kPa]
22/15
24/17
27/19
29/21
32/23
Indoor
DB/WB T e m p.
Page 27
5-13
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
5.4.9 Heating — Test Mode
Suction Pressure VS.Outdoor Temp.
200
300
400
500
600
700
800
900
1000
1100
-15 -10 -5 0 5 10 15
Outdoor WB Temperature[ºC ]
Suction Pressure [kPa]
15
20
25
Indoor DB
Discharge Pressure VS. Outdoor Temp.
1000
1250
1500
1750
2000
2250
2500
2750
3000
3250
3500
3750
4000
-15 -10 -5 0 5 10 15
Outdoor WB Temperature[ºC ]
Discharge Pressure [kPa]
15
20
25
Indoor DB
Page 28
6-1
SOUND LEVEL CHARACTERISTICS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
6. SOUND LEVEL CHARACTERISTICS
6.1 Sound Pressure Level
Figure 1. Wall Mounted Figure 2. Floor Mounted
Figure 3. Ducted Figure 4. Cassette
6.2 Sound Pressure Level Spectrum (Measured as Figure 1)
WNG 50 WNG 60
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
FAN SPEED LINE
HI
ME
LO
Page 29
6-2
SOUND LEVEL CHARACTERISTICS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
Sound Pressure Level Spectrum (Measured as Figure 1)
WNG 80
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
Page 30
6-3
SOUND LEVEL CHARACTERISTICS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
6.3 Outdoor units
6.4 Sound Pressure Level Spectrum (Measured as Figure 5)
DCI 50 Cooling DCI 50 Heating
DCI 60 Cooling DCI 60 Heating
Microphone Distance from Unit
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
Page 31
6-4
SOUND LEVEL CHARACTERISTICS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
Sound Pressure Level Spectrum (Measured as Figure 5)
DCI 80 Cooling DCI 80 Heating
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
Page 32
7-1
ELECTRICAL DATA
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
7. ELECTRICAL DATA
7.1 Single Phase Unit
Model WNG50 WNG60 WNG80
Power Supply 1 PH ,220-240VAC ,50HZ
Connected to To indoor
Maximum Current 13.5A 15A 15.7A
Inrush Current \
(a)
45 A <35A
Starting Current\
(b)
13.5 A 15A 15.7A
Circuit Breaker 20 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
at outdoor unit controller).
(b) Starting current is the current at compressor start up.
NOTE
Power wiring cord should comply with local lows and electrical
regulations requirements.
Page 33
8-1
WIRING DIAGRAMS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
8. WIRING DIAGRAMS
8.1 Indoor Unit: WNG 50_60 DCI
8.2 Outdoor Unit: DCI 50_60 DCI
Brown
Red
Blu e
Y/G
Di spl ay
Note: The dashed part is optional
To metal sheet
Power supply
Y/G
Brown
Blue
~230V 50Hz
4/L
6
5/C
L
magnet ic ring
5
P14P19P11P15P16
PH-12
P9
brown
capacitor
gray
2uF 450V
white
black
gray
blue
4
2
13
IFAN
Fr e s h Air
RAT
ICT
Jumper
312
45
54
213
211
2
2 1 21
P3
Indoor unit controller PCB
P22 P20
P5(white)
(red)
P4
P2
P8
(Re d)
1
megatool
P7
P13
42
3
871
P6(White)
P12
P10(Re d)
Ionizer
power out
red
6
M
Ionizer
ESF
power out
M1
ESF
M2
1 2
P24
910
P1
Dry contact
(clock)
Hori zontal step motor
Vertical step motor
COM
Brown
Blue
Red
L-F
FUSE
N-F
COM
N
L
Black
EMI f ilter PCB
EARTH
NCOM
EARTH
Y/G
Y/G
Red
Red
L/4
Blue
N/3
Brown
C/5
Blue
Brown
EEV
Y/G
Y/G
CTTOATOCT
OFAN
3 4
Black
EARTH
3 4
Outdoor unit controller PCB
Red
P10
COML
N
N-COM
P13P9P3P11
U
V
W
JP9
P12
EARTH
Jumper
2
13
5
6
4
P4
P14
1
2
1 2
P6
P1
1
2
Choke coil
White
Red
Brown
Black
COMP
Vdc
Blue
1 2
valve
Reverse
Base
heater
Blue
Orange
Yellow
P7
6
3
2
5
4
Flash
1
JP1
1
42
3
5 6
P2
1
2
P8P20P19
2
111
22
FG
V
cc
Vsp
5 6
Page 34
8-2
WIRING DIAGRAMS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
8.3 Indoor & Outdoor Units: WNG 80 DCI
Page 35
9-1
REFRIGERATION DIAGRAMS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
9. REFRIGERATION DIAGRAMS
9.1 Heat Pump Models
9.1.1 WNG 50_60 / DCI 50_60 DCI: Cooling Mode
9.1.2 WNG 50_60 / DCI 50_60 DCI: Heating Mode
EEV
EEV
Page 36
9-2
REFRIGERATION DIAGRAMS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
9.1.3 WNG 80 / DCI 80 DCI: Cooling Mode
9.1.4 WNG 80 / DCI 80 DCI: Heating Mode
Page 37
10-1
TUBING CONNECTIONS
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
10. TUBING CONNECTIONS
TUBE (Inch)
TORQUE (Nm)
¼” ⅜” ½” ⅝” ¾”
Flare Nuts 11-13 40-45 60-65 70-75 80-85
Valve Cap 13-20 13-20 18-25 18-25 40-50
Service Port Cap 11-13 11-13 11-13 11-13 11-13
1. Valve Protection Cap-end
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.
Page 38
11-1
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
11. CONTROL SYSTEM WNG 50, 60
11.1 General Functions and Rules (for single split models)
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.
11.2 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 a parameter 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.
11.3 Compressor Frequency Control
11.3.1 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 LOAD calculation, 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
Low
Max NLOADIF1C
127
Medium
Max NLOADIF2C
127
High
Max NLOADIF3C
127
Turbo
Max NLOADIF4C
127
Auto
Max NLOADIF5C
127
NLOAD limits as a function of power shedding:
Mode Power Shedding OFF Power Shedding ON
Cool No limit Nominal Cooling
Heat No limit Nominal Heating
Page 39
11-2
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
11.3.2
Target Frequency Setting
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:
NLOAD Target Frequency
127
Maximum frequency
10 < NLOAD < 127 Interpolated value between minimum and maximum frequency
10
Minimum frequency
0 Compressor is stopped
Target frequency limits as a function of outdoor air temperature (OAT):
OAT Range Cool mode limits Heat mode limits
OAT < 6 No limit
6 OAT < 15
MaxFreqAsOAT1H
15 OAT < 24
MaxFreqAsOATC
24 OAT No limit
MaxFreqAsOAT2H
11.3.3 Frequency Changes Control
Frequency change rate is 1 Hz/sec.
11.3.4
Compressor Starting Control
Frequency
Time
Min 10 Minutes
1
Minute
Step 1
Step 3
1
Minute
Step 2
11.3.5 Minimum On and Off Time
3 minutes
Page 40
11-3
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
11.4 Indoor Fan Control
10 Indoor fan speeds are determined for each model. 5 speeds for cool/dry/fan
modes and 5 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.
11.4.1
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.
11.5 Heating Element Control
Heating element can be started if LOAD > 0.8 * MaximumNLOAD AND Indoor
Coil temperature < 45.
The heating element will be stopped when LOAD < 0.5 * MaximumNLOAD OR if
Indoor Coil temperature > 50.
11.6 Outdoor Fan Control
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, and outdoor air temperature (OAT) and
heat sink temperature (HST).
Routine Conditions
A
Heating with OAT < 15
0
C
or
Cooling with OAT > 20
0
C, or HST > 500C
or
Faulty OAT
B Cooling with 20
0
C > OAT > 70C
C Cooling with 7
0
C > OAT
D Heating with OAT > 15
0
C
Page 41
11-4
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
Outdoor Fan Speed
Compressor Frequency (CF)
Routine A Routine B Routine C Routine D
CF = 0 OFF OFF OFF OFF
10 CF <
OFLowFreq
Low Low Very Low Low
OFLowFreq CF < OFMedFreq
Medium Low Very Low Low
OFMedFreq CF
High Low Low Medium
In cooling mode, the extra rule is as the below:
Change To Higher
OFAN Cool state (*1)
45
50
HST
Change To lower
OFAN Cool state
(*1) If State C, change to B
If State B, change to A
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.
11.7 EEV (electronic Expansion valve) Control
EEV opening is defined as EEV = EEVOL + EEV
CV
EEVOL is the initial EEV opening as a function of the compressor frequency,
operation mode, unit model and capacity.
EEV
CV
is a correction value for the EEV opening that is based on the compressor
temperature.
During the first 10 minutes of compressor operation EEV
CV
= 0.
Once the first 10 minutes are over, the correction value is calculated as follow:
EEV
CV
(n) = EEVCV(n-1) + EEV
CTT
EEV
CTT
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.
11.8 Reversing Valve (RV) Control
Reversing valve is on in heat mode.
Switching of RV state is done only after compressor is off for over 3 minutes
.
Page 42
11-5
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
11.9 Ionizer Control
Ionizer is on when unit is on AND indoor fan is on AND Ionizer power switch (on
Ionizer) is on
.
11.10 Electro Static Filter (ESF) Control
ESF is on when ESF switch is on, Safety switch is pressed, unit is on, AND
indoor fan is on.
11.11 Base Heater Control
When OAT is connected, Base Heater will be on when unit is in heating and
OAT<2
0
C.
When OAT is disconnected, Base Heater will be on when unit is in heating.
11.12 Fan Mode
In high/ medium/ low indoor fan user setting, unit will operate fan in selected
speed.
In Auto Fan user setting, fan speed will be adjusted automatically according to
the difference between actual room temperature and user set point temperature.
11.13 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 Auto Fan user setting, fan speed will be adjusted automatically according to
the calculated NLOAD.
11.14 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.
11.15 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.
Page 43
11-6
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
Model J2 Shorted J2 Opened
Wall mounted Compensation Disabled Compensation Enabled
Cassette Compensation Enabled Compensation Disabled
Ducted Compensation Enabled Compensation Disabled
Floor/Ceiling Compensation Disabled Compensation Enabled
11.16 Indoor Fan Control in Heat Mode
Indoor fan speed depends on the indoor coil temperature:
11.17 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.
11.18 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.
11.19 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.
ICTVL ICTH ICTL
ICTST
ICTT
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11.19.1 Indoor Coil Defrost Protection
ICT Trend
ICT
Fast
Increasing
Increasing No change Decreasing Fast
Decreasing
ICT < -2 SC SC SC SC SC
-2 ICT < 0 D1 D1 D2 D2 D2
0 ICT < 2 SR SR D1 D2 D2
2 ICT < 4 SR SR SR D1 D2
4 ICT < 6 Norm Norm SR SR D1
6 ICT < 8 Norm Norm Norm SR SR
8 ICT Normal
11.19.2 Indoor Coil over Heating Protection
ICT Trend
ICT
Fast
Decreasing
Decreasing No Change Increasing Fast
Increasing
ICT > 55 SC SC SC SC SC
53 < ICT 55 D1 D1 D2 D2 D2
49 < ICT 53 SR SR D1 D2 D2
47 < ICT 49 SR SR SR D1 D2
45 < ICT 47 Norm Norm SR SR D1
43 < ICT 45 Norm Norm Norm SR SR
ICT 43 Normal
11.19.3 Compressor over Heating Protection
Compressor temperature can be in one of 5 control zones (4 in protection, and 1
normal), according to the following chart.
Normal
P1
P2
Stop-Compresor
CTTOH1
CTTOH2
CTTOH3
CTTOH4
CTT
P3
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Control Status
Compressor Temperature
Increases
Else
P1 Norm SR
P2 D1 SR
P3 D2 D1
Stop Compressor SC
11.19.4 Compressor over Current Protection
Normal
Stop-Rise
HzDown1
HzDown2
Stop-Compresor
CCROC1
CCROC2
CCROC3
CCROC4
CCR
11.19.5 Heat Sink over Heating Protection (NA for DCI 25 and 35
HST Trend
HST
Decreasing No Change Increasing
HST > 90 SC SC SC
85 < HST 90 D1 D2 D2
82 < HST 85 SR D1 D2
80 < HST 82 SR SR D1
78 < HST 80 Norm Norm SR
HST 78 Normal
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11.19.6
Outdoor Coil Deicing Protection
Deicing Starting 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
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.
11.19.7
Deicing Protection Procedure
COMP
RV
OFAN
EEV
ON
HEAT
COOL
ON
OFF
EEVDeicerOpen
Any
T1 T2
T3 T3
T1
12
0
Threshold
max. 12 minutes
DT
OCT
T1 = T2 = 36 seconds, T3 = 6 seconds
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11.20 Condensate Water Over Flow Protection
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
11.20.1
3 Levels Logic (used in floor/ceiling models)
P2 P3 Level
0 0 L0
1 0 L1
1 1 L2&3
0 1 L4
Water Level
ANY
0
BLINK
NLOAD
OPER LED
LEVEL1
LEVEL2&3
LEVEL4
NORMAL
ON
Pump
OFF
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11.20.2 1 Level Logic (used in all models except for floor/ceiling models)
P2 P3 Level
Don’t
care
1 Normal
Don’t
care
0 Overflow
ANY
0
ON
NLOAD
PUMP
OFF
ON
OPER
LED
OFF
Overflow
Water Level
Normal
BLINK
NLOAD is
forced to 0
8 min 8 min
Overflow when
unit is ON
Overflow when
unit is OFF
8 min
11.21 Indoor Unit Dry Contact
Indoor unit Dry contact has two alternative functions that are selected by
J8.
Function Contact = Open Contact = Short
J8 = Open Presence Detector Connection No Limit Forced to STBY
J8 = Short Power Shedding Function No Limit Limit NLOAD
11.22 Operating the Unit from the Mode Button
Forced operation allows starting, stopping and operating in Cooling or
Heating, in pre-set temperature according to the following table:
Forced operation Mode Pre-set Temperature
Cooling 200C
Heating 28
0
C
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11.23 On Unit Controls and Indicators
11.23.1 Indoor Unit Controller Controls and Indicators for All Models
STAND BY INDICATOR
1. Lights up when the Air Conditioner is connected to power
and ready to receive the R/C commands
OPERATION INDICATOR
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).
TIMER INDICATOR
Lights up during Timer and Sleep operation.
FILTER INDICATOR
Lights up when Air Filter needs to be cleaned.
COOLING INDICATOR
Lights up when system is switched to Cool Mode by using the Mode
Switch on the unit
.
HEATING INDICATOR
Lights up when system is switched Heat Mode by using the Mode
Switch on the unit
.
Mode SWITCH
(COOL/HEAT/OFF)
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.
RESET / FILTER SWITCH
For short pressing:
When Filter LED is on - turn off the FILTER INDICATOR after a
clean filter has been reinstalled.
When Filter LED is off – enable/disable the buzzer announcer, if
selected.
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11.23.2 Indoor Unit Controls and Indicators for LCD Display
STBY Cool Heat Auto Fan Dry
OFF SPT(1*) SPT(1*) SPT(1*) SPT(1*) SPT(1*)
OFF(2*) ON(2*) ON(2*) ON(2*) ON(2*) ON(2*)
OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*)
(Low)
OFF
(Med)
OFF
(High)
OFF
(Turbo)
OFF
(Auto)
OFF
User
setting
IFAN
speed
User
setting
IFAN
speed
User
setting
IFAN
speed
User
setting
IFAN
speed
User
setting
IFAN
speed
Backlight(red)
OFF OFF ON(3*) ON(3*) ON(3*) OFF
Backlight(green)
OFF ON(3*) OFF ON(3*) ON(3*) ON(3*)
11.24 Outdoor Unit Controller Indicators
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.
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11.25 Jumper Settings
11.25.1 Indoor Unit Controller
0 = Open Jumper (disconnect jumper).
1 = Close Jumper (connect jumper).
Self test Jumper – J1
OPERATION
J1
SELF-TEST
1
NORMAL
0
Compensation Jumper – J2
Model J2 (Default) Compensation
Wall Mounted 0 Activated
Floor/Ceiling 1 Deactivated
Ducted/cassette 1 Activated
Family selection Jumper – J3, J4 and J5
Family J5 J4 J3
Reserved
Reserved
Reserved
Wall Mounted (WNG/FLO)
Floor/Ceiling (PXD)
Reserved
Ducted (LS)
Cassette (K)
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
IDU Model
Jumper Setting
J8 J7 J6 J5 J4 J3
WNG25 000011
WNG35 010011
WNG50 001000
WNG60 011000
WNG80 001001
PXD25 000100
PXD35 010100
PXD50 100100
K25 000111
K35 010111
K50 100111
LS35 010110
For wall mounted units Jumpers j7, j8 can be configured by service. All other jumpers on
the above table are factory default (cannot be changed by service).
For unit types as Cassettes, floor ceiling, and ducted, jumpers are set by a model plug.
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Model selection Jumper – J7, J8
Model J8 J7
A
B
C
D
0 0
0 1
1 0
1 1
J9- Presence Detector/Power Shedding
OPERATION J9
Presence Detector 0
Power Shedding 1
Jumper – J10
OPERATION J10
WNG DCI LCD 0
LED 1
11.25.2 Outdoor Unit Controller
JP9 JUMPER LAYOUT
Reserved (PIN 9) ODU3 (PIN 7) ODU2 (PIN 5) ODU1 (PIN 3) ODU0 (PIN 1)
GND (PIN 10) GND (PIN 8) GND (PIN 6) GND (PIN 4) GND (PIN 2)
11.25.3 ODU MODEL SELECTION
ODU3 ODU2 ODU1 ODU0 ODU Model
OFF OFF OFF OFF Reserved
OFF OFF OFF ON (PIN1 & PIN2) A (DCI 25)
OFF OFF ON (PIN3 & PIN4) OFF B (DCI 35)
OFF OFF ON (PIN3 & PIN4) ON (PIN1 & PIN2) C (DCI 50)
OFF ON (PIN5 & PIN6) OFF OFF D
OFF ON (PIN5 & PIN6) OFF ON (PIN1 & PIN2) E (Duo)
OFF ON (PIN5 & PIN6) ON (PIN3 & PIN4) OFF F
OFF ON (PIN5 & PIN6) ON (PIN3 & PIN4) ON (PIN1 & PIN2) G
ON (PIN7 & PIN8) OFF OFF OFF H
ON (PIN7 & PIN8) OFF OFF ON (PIN1 & PIN2) I
ON (PIN7 & PIN8) OFF ON (PIN3 & PIN4) OFF J
ON (PIN7 & PIN8) OFF ON (PIN3 & PIN4) ON (PIN1 & PIN2) K
ON (PIN7 & PIN8) ON (PIN5 & PIN6) OFF OFF L
ON (PIN7 & PIN8) ON (PIN5 & PIN6) OFF ON (PIN1 & PIN2) M
ON (PIN7 & PIN8) ON (PIN5 & PIN6) ON (PIN3 & PIN4) OFF N
ON (PIN7 & PIN8) ON (PIN5 & PIN6) ON (PIN3 & PIN4) ON (PIN1 & PIN2) O
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11.26 Test Mode
11.26.1 Entering Test Mode
System can enter Test mode in two ways:
Automatically when the following conditions exists for 30 minutes
continuously:
o Mode = Cool, Set point = 16, Room temperature = 27±1, Outdoor
temperature = 35±1
Or
o Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor
temperature = 7±1
Manually when entering diagnostics with the following settings:
o Mode = Cool, Set point = 16
o Mode = Heat, Set point = 30
11.27 Unit Operation in Test Mode
In test mode, the unit will operate in fixed settings according to the indoor fan
speed setting:
During test mode, protections are disabled, except for stop compressor status.
Indoor Fan Speed Setting Unit Setting
Low Minimum Capacity Setting
High Nominal Capacity Setting
Auto Maximum Capacity Setting
11.28 Additional Functions and Rules (for DUAL split models)
The DCI SW 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.
11.29 System Control Concept
All indoor unit related items control remains the same as in single split
applications.
All outdoor units related control logic remains the same as in single split
applications.
The MSMP controller is responsible only for the following control:
Setting of system operation mode (cool/heat)
Setting the NLOAD for the outdoor units
Controlling of the EEV’s
Dry contacts control
11.30 Compressor Frequency Control
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11.32.1 Indoor Units Operation when Indoor Unit Mode is Different than
Outdoor Unit Mode
Open louvers according to user selection.
Indoor fan is forced to OFF.
11.33 Dry Contacts Control
Dry Contact Contact = Open Contact = Short
STBY No Limit System is Forced to STBY
Night No Limit Outdoor fan speed reduced to low in cooling mode
A dry contact output for Alarm will be shorted when any failure exists in the system.
11.30 Compressor Frequency Control
11.30.1 Outdoor Unit NLOAD setting
The MSMP controller gets the NLOAD from each of the indoor units, and sends a
combined NLOAD to the outdoor unit control. The combined NLOAD is a
weighted average of the indoor units NLOAD.
The weight of the indoor units as a function of their nominal capacity:
Indoor Unit Capacity [kW] (kBtu/hr) Capacity Code
2.5 (9000) 1
3.5 (12000) 1.5
5.0 (18000) 2
7.2 (24000) 3
11.31 EEV (electronic Expansion valve) Control
EEV opening is defined as EEV = EEVOL + EEV
CV
EEVOL is the initial EEV opening as a function of the compressor
frequency, operation mode, unit model and capacity.
EEV
CV
is a correction value for the EEV opening that is based in cooling
mode on the relevant indoor unit super heat and compressor temperature.
During the first 10 minutes of compressor operation EEV
CV
= 0.
11.32 System Mode Setting and Reversing Valve (RV) Control
The first indoor unit that is causing the system to be turned ON sets the system
mode.
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11.34 SW Parameters
11.34.1 Indoor Units SW Parameters
General Parameters for All Models:
Parameters defining the indoor fan speed as a function of Indoor Coil
temperature in heat mode (ICT):
ICTST Speed ICT to stop indoor fan 25
ICTVLSpeed ICT to go down to very low speed 28
ICTLSpeed ICT to start in very low speed 30
ICTHSpeed ICT to start in increase speed from very low 32
ICTTSpeed ICT to enable Turbo fan speed 40
Model Depended Parameters:
Wall Mounted Models
Parameter name
DCI 25 DCI 35 DCI 50 DCI 60
NLOAD limits as a function of selected indoor fan speed
MaxNLOADIF1C 40 40 45 50
MaxNLOADIF2C 53 53 62 85
MaxNLOADIF3C 120 120 120 120
MaxNLOADIF4C 127 127 127 127
MaxNLOADIF5C 127 127 127 127
Indoor Fan speeds
IFVLOWC 700 700 700 800
IFLOWC 800 800 900 1000
IFMEDC 900 950 1050 1100
IFHIGHC 1050 1100 1200 1250
IFTURBOC 1150 1200 1250 1300
IFVLOWH 700 700 700 800
IFLOWH 800 850 900 950
IFMEDH 950 1000 1100 1150
IFHIGHH 1100 1150 1200 1250
IFTURBOH 1200 1250 1300 1300
Nominal Compressor Frequency
NomLoadC 40 62 62 85
NomLoadH 55 67 74 80
Cassette Models
Parameter Name
K 25 K 35 K 35S K 50
NLOAD limits as a function of selected indoor fan speed
MaxNLOADIF1C 40 40 40 40
MaxNLOADIF2C 53 56 56 60
MaxNLOADIF3C 120 90 90 90
MaxNLOADIF4C 127 90 90 90
MaxNLOADIF5C 127 90 90 90
Nominal Compressor Frequency
NomLoadC 40 60 56 63
NomLoadH 55 69 73 80
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11.34.2 Outdoor Units SW Parameters:
Parameter Name DCI25 DCI35 DCI 50 DCI50 DUO DCI 60
Compressor Parameters
MinFreqC 30 33 20 20 20
MaxFreqC 64 80 85 97 95
MinFreqH 30 35 20 26 26
MaxFreqH 81 93 99 106 94
Step1Freq 60 60 60 60 60
Step2Freq 70 70 70 80 70
Step3Freq 90 90 90 90 90
Frequency limits as a function of outdoor air temperature
MaxFreqAsOATC 50 50 64 62 85
MaxFreqAsOAT1H 65 75 85 85 80
MaxFreqAsOAT2H 60 60 60 60 60
Compressor Over Heating Protection
CTTOH1 94 94 94 90 94
CTTOH2 98 98 98 95 98
CTTOH3 102 102 102 102 102
CTTOH4 105 105 105 105 105
Compressor Over Current Protection [A]
CCR01 7.1 7.1 10 10 11.4
CCR02 7.5 7.5 10.5 10.5 11.8
CCR03 7.9 7.9 10.8 10.8 12.2
CCR04 8.3 8.3 11.2 11.2 12.6
Outdoor Fan Speed (RPM)
VL 200 200 200 200 200
OFLOWC 550 550 600 600 550
OFMEDC 700 700 760 830 700
OFMAXC 830 830 920 920 790
OFLOWH 550 550 600 600 550
OFMEDH 700 700 830 920 700
OFMAXH 830 830 1000 1000 790
Outdoor Fan Limit Control
OFLowFreqC 45 45 40 40 35
OFMedFreqC 57 57 70 70 55
OFLowFreqH 45 45 40 40 40
OFMedFreqH 57 57 86 86 60
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12. CONTROL SYSTEM WNG 80 DCI
12.1 Abbreviations
Abbreviation Definition
A/C Air Condition
BMS Building Management System
PWR System Power
CTT Compressor Top Temperature sensor
DCI DC Inverter
EEV Electronic Expansion Valve
HE Heating Element
HMI Human Machine Interface
HST Heat Sink Temperature sensor
Hz Hertz (1/sec) – electrical frequency
ICT Indoor Coil Temperature (RT2) sensor
IDU Indoor Unit
MCU Micro Controller Unit
OAT Outdoor Air Temperature sensor
OCT ODU Coil Temperature sensor
ODU Outdoor Unit
OFAN Outdoor Fan
PFC Power Factor Corrector
RAC Residential A/C
RC Reverse Cycle (Heat Pump)
RGT Return Gas Temperature sensor
RPS Rounds per second (mechanical speed)
RV Reverse Valve
SB,STBY Stand By
OMT Outdoor Middle Temperature
S/W Software
TBD To Be Defined
TMR Timer
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12.2 Product Overview
12.2.1 Block Diagram
Input
Filter
PFC
IPM
Switching
Power
Application
Control
Communication
Comp.
OFAN
RV
Base
Heater
LED’sEEV’s
Alarm
Temperature Sensors
Dry Contacts
Configuration Jumpers
EEMP
Drivers
Drivers, A/D
IDU
Control
Communication
Power
HMI
1ph/ 230V/ 50Hz
12.2.2 Compressor
DC brush less and sensor less 2.5/3 horsepower motor inverter driven compressor.
12.2.3 Outdoor Fan
DC brush less motor.
12.2.4 RV
Reverse Valve set the direction of refrigerant flow in the system, thus setting the operation
mode for cooling or heating.
When the solenoid is powered, system will work in heat mode.
12.2.5 EEV’s
Expansion valve operated by step motor which controls the size of the orifice.
12.2.6 HMI (Optional for single)
Three “7-Segments” + four Push buttons
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12.2.7 Dry Contacts
Dry contacts are used to interface the system with an external building management system
(BMS).
• Night input. Switches the system to night mode when closed.
During night mode, the outdoor unit speed will be reduced in order to reduce the system
noise level.
• SB input. System will be turned to Stand-by when the contact is closed.
• Power Shedding input. Limits the maximum power consumption when closed.
• Forced Mode input. Used to force the operation mode of the system
• Alarm output indicates a failure at the system.
Alarm output will be activated when there in the following ODU Faults/Protections
1 to 6, 8 to 22, 24, 25, 27 and 28.
Alarm output will be OFF when the Fault/Protection is cleared.
12.2.8 Temperature Sensors
CTT – Compressor Top Temperature
OAT – Outdoor Air Temperature
OMT – Outdoor Middle Temperature
OCT – Outdoor Coil (heat exchanger) Temperature
HST – Heat Sink Temperature
12.2.9 Base Heater
Heating element designed to defrost any ice that is accumulated on the outdoor unit base
during low heating operation.
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12.3 General Operating Rules
12.3.1 Initialization
Initialization process is the first operation done each time power is up.
The targets of the initialization are:
• Addressing of IDU
• Identification of connected IDU
• IDU Matching Check
• EEV’s homing (reset position)
• Restoring Parameters from EEPROM/Jumpers/Dipswitches
12.3.1.1 IDU’s Initialization Faults Definition and System Response
Fault Activity Fault Display System response
Missing IDU
Update new IDU status stored at the
EEPROM.
System configuration
Changed
Change in IDU
Family/Capacity
Group
Fault will be stored in EEPROM as
an inactive failure of the specific
IDU
System configuration
Changed
IDU Code Exceed
Limit
Fault will be stored in EEPROM for
the specific IDU
System Configuration
Problem
System will switch
to SB
Total IDU Code
Exceed Limit
ODU fault will be stored in
EEPROM
System Configuration
Problem
System will switch
to SB
12.3.1.2 WNG72/80 Definition
Indoor Model Family Model IDU Code
WNG72 WNG 18 C 3
WNG80 WNG 30 A 3
The models are named by their family and capacity. For example WNG 9 means a wall mounted
units with a nominal cooling capacity of 9000 Btu/hr (which is equivalent to 2.5 kW). The nominal
capacity of the indoor unit sets it’s capacity code
12.3.2 Communication with Indoor Units
12.3.2.1 Communication Failures Definition
Two types of communication failures are diagnosed. The communication failures are
checked separately for IDU channel.
12.3.2.2 ‘Bad Communication’ fault
The system keeps a balance of a good/bad communication packet ratio for communication
channel. When the ratio getting high , system enters ‘Bad Communication’ fault.
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12.3.2.3 ‘No Communication’ fault
If no legal transmission or no message received for 30 seconds, system enters ‘No
Communication’ fault.
• If there is no communication, the following will be performed:
1. The unit changes to STBY.
2. The system will scan all the communication channels.
3. Each channel that is identified as ‘no communication’ channel will be referred as
STBY unit.
4. The unit resumes its normal operation with only the operative channels.
12.3.3 Temperature Measurements
12.3.3.1 Thermistor failures definition
Thermistor Thermistor is Disconnected Thermistor is Shorted
OCT Temp < -40 °C Temp > 75 °C
OAT Temp < -40 °C Temp > 75 °C
CTT Temp < -30 °C Temp > 130 °C
OMT Temp < -40 °C Temp > 75 °C
HST Temp < -30 °C Temp > 130 °C
12.3.3.2 System responses for different thermistor failure
Thermistor Default value System Reaction
OCT 6°C
OAT
Cool 35°C
Heat 7°C
CTT 43°C Forced compressor to OFF after 20 minutes.
OMT 43°C
HST 43°C
ICT 43°C
12.3.4 Flash Memory Programming
In order to upgrade the ODU software, will be used. A special application
For upgraiding new software via a PC, the auxiliary port on the outdoor controller can be
used by running a special firmware.
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12.4 Indoor Unit Control
12.4.1 Indoor Fan Control
10 Indoor fan speeds are determined for each model. 5 speeds for each mode cool/dry/fan
or heat.
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.
12.4.1.1 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 higher than 3 degrees.
Room temperature is higher than 22°C for cooling or less than 25°C for heating.
12.4.2 Cooling 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 according to the selected
speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
12.4.3 Heating 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 according to the selected
speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
12.4.3.1 Temperature Compensation
In wall mounted, ducted, and cassette models, 3 degrees are reduced from the actual
room temperature reading (except when in I-Feel mode), to compensate for temperature
difference between high and low areas in the room.
The temperature compensation can be enabled/disabled by shortening of jumper J2 on the
indoor unit controller.
Model J2 Shorted J2 Opened
Wall mounted Compensation Disabled Compensation Enabled
Cassette Compensation Enabled Compensation Disabled
Ducted Compensation Enabled Compensation Disabled
Floor/Ceiling Compensation Disabled Compensation Enabled
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12.4.3.2 Indoor Fan Control in Heat Mode
Indoor fan speed depends on the indoor coil temperature:
ICTST ICTVL ICTL ICTH ICTT
12.4.4 Auto Cool/Heat Mode
When in auto cool heat mode unit will automatically select between cool and heat mode
according to the difference between the actual room temperature and the user set point
temperature (ΔT).
Unit will switch from cool to heat when compressor is off for 3 minutes, and ΔT < -3.
Unit will switch from heat to cool when compressor is off for 5 minutes, and ΔT < -3.
12.4.5 Dry Mode
As long as the 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 in intervals of 3 minutes OFF, 1 minute ON.
12.4.6 Heating Element Control
Heating element can be lit on if LOAD > 0.8 * MaximumNLOAD AND the Indoor Coil
temperature is lower then 45°C.
The heating element will be off when LOAD < 0.5 * MaximumNLOAD OR if the Indoor Coil
temperature higher then 50°C.
12.4.7 Ionizer Control
WNG Family - Ionizer is on when:
• The Ionizer power switch (on the Ionizer) is on.
• Unit AND indoor fan are on.
• ESF Safety switch is on.
12.4.8 Electro Static Filter (ESF) Control
WNG Family - ESF is on when:
• ESF switch is on,
• ESF Safety switch is pressed,
• Unit is on, AND indoor fan is on.
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12.4.9 Indoor Unit Dry Contact
Indoor unit Dry contact has two alternative functions that are selected by J8.
Status Function Contact = Open Contact = Short
J9 = Open Presence Detector Connection No Limit Forced to STBY
J9 = Short Power Shedding Function No Limit Limit NLOAD
12.4.10 Operating the Unit from the Mode Button
Forced operation allows to start, stop and operate in Cooling or Heating, in pre-set
temperature according to the following table:
Forced operation Mode Pre-set Temperature
Cooling 20
0
C
Heating 28
0
C
12.4.11 On Unit Controls and Indicators
12.4.11.1 All Models Except for Floor/Ceiling model
STAND BY
INDICATOR
Lights up when the Air Conditioner is connected to power and ready to receive
the R/C commands
OPERATION
INDICATOR
Lights up during operation.
Blinks for 300 msec to announce that a R/C infrared signal has been received
and stored.
Blinks continuously during protections (according to the relevant spec section).
TIMER INDICATOR
Lights up during Timer and Sleep operation.
FILTER INDICATOR
Lights up when Air Filter needs to be cleaned.
COOLING INDICATOR
Lights up when system is switched to Cool Mode by using the Mode Switch on
the unit.
HEATING INDICATOR
Lights up when system is switched Heat Mode by using the Mode Switch on
the unit.
Mode SWITCH
(COOL/HEAT/OFF)
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.
RESET / FILTER
SWITCH
For short pressing:
When Filter LED is on - turn off the FILTER INDICATOR after a clean filter has
been reinstalled.
When Filter LED is off – enable/disable the buzzer announcer, if selected.
12.4.11.2 LCD Display
ESF/Fresh Air Timer Filter
STBY/Oper
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STBY Cool Heat Auto Fan Dry
OFF SPT SPT SPT SPT SPT
OFF ON ON ON ON ON
OFF OFF OFF OFF OFF OFF
(Low)
OFF
User
setting
IFAN
speed
User
setting
IFAN
speed
User
setting
IFAN
speed
User
setting
IFAN
speed
User
setting
IFAN
speed
(Med)
OFF
(High)
OFF
(Turbo)
OFF
(Auto)
OFF
Backlight(red) OFF OFF ON ON ON OFF
Backlight(green) OFF ON OFF ON ON ON
12.4.11.3 Floor/Ceiling Model
STANDBY
INDICATOR
Lights up when the Air Conditioner is connected to power and is ready for operation
OPERATE
INDICATOR
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).
TIMER INDICATOR
Lights up during Timer and Sleep operation.
FILTER INDICATOR
1. Lights up when Air Filter needs to be cleaned.
2. Blinks during Water Over Flow in PXD models. (Cf. Sect. 7.3)
COOLING
INDICATOR
Lights up when system is switched to Cool Mode by using the Mode Switch on the
unit.
HEATING INDICATOR
Lights up when system is switched Heat Mode by using the Mode Switch on the unit.
FAN MODE
INDICATOR
Lights up in Fan Mode activated by local switches.
FAN SPEED
INDICATORS
L -- Lights up when IFAN setting is Low.
M -- Lights up when IFAN setting is Medium.
H -- Lights up when IFAN setting is High.
A -- Lights up when IFAN setting is Auto.
TEMP. SETTING
INDICATORS
Each one of the seven indicators indicates the following SPT: 18, 20, 22, 24, 26, 28,
30 [oc]. The odd number temperatures are indicated by turning on the two adjacent
indicators.
FAN SPEED BUTTON
Press this button to change the speed of the IFAN. Each pressing change the speed
in the sequence of: ... L → M → H → Auto → L → ...
TEMP. SETTING UP
BUTTON
Pressing this button increases the SPT by 1oc.
Note: The Max SPT is 30
o
c.
TEMP. SETTING
DOWN BUTTON
Pressing this button decreases the SPT by 1oc.
Note: The Min SPT is 18oc.
MODE BUTTON
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.
POWER BUTTON
Toggle the unit between OPER & STBY modes.
RESET / FILTER
BUTTON
For short pressing:
When Filter LED is on - turn off the FILTER INDICATOR 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).
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12.5 Outdoor Unit Control
12.5.1 Run Mode
Run mode is the default operation mode of the system. This is the standard operation mode that
is active in field application (at customer site).
System can go from run mode to other operation modes through keyboard or serial ports.
12.5.2 Mode Setting
Mode defines the ODU operation mode. There are three possible operation modes:
1. STBY – standby mode
2. COOL - the unit operating at cooling cycle
3. HEAT - the unit operating at heat pump cycle
4. SB Input
The ODU will change mode between COOL/HEAT and Idle according to the STBY
dry contact input as follows:
STBY input ODU mode
Short SB
Short Open
last mode
Open according normal mode selection
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12.5.3 Compressor Speed Control
12.5.3.1 Compressor Min On/Off time
Compressor minimum OFF time is (MinOFFTime) 3 minutes except during Deicing protection.
Compressor minimum ON time is (MinOnTime) 3 minutes, minimum ON time is ignored during
protections, and when unit is turned to STBY.
12.5.3.2 Compressor Speed calculation
During normal operation (excluding protections), the compressor speed is limited by the
minimum speeds:
Min Speed
Cool
Max Speed
Cool
Min Speed
Heat
Max Speed
Heat
15 75 15 95
12.5.3.3 Indoor Units NLOAD calculation
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 LOAD
calculation, 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
Low Max NLOADIF1C 127
Medium Max NLOADIF2C 127
High Max NLOADIF3C 127
Turbo Max NLOADIF4C 127
Auto Max NLOADIF5C 127
NLOAD limits as a function of power shedding:
Mode Power Shedding OFF Power Shedding ON
Cool No limit Nominal Cooling
Heat No limit Nominal Heating
12.5.3.4 Outdoor Unit NLOAD calculation
ODU NLOAD is the weighted average of IDU NLOAD:
ODU codeH is defined as following:
The code for heat mode is related also to outdoor temperature and so in low heating conditions
the compressor speed will be higher.
Compressor speed will be set between the minimum speed and the max speed according to
the ODU NLOAD.
ODU codeC is defined as following (EEPROM values):
Unit type
ODU codeC
Cool
Single (Default) 3
ODU =
IDU NLOAD
ODUCode
Code
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12.5.4 EEV Control
12.5.4.1 Operation Range
The EEV operation range is defined according to the operation mode as following
ODU Mode Normal operation IDU inactive Compressor off
SB 200
200
COOL 80 to 350 0
HEAT 70 to 400 60 to 140
12.5.4.2 Reaching target value rules
For all cases except at EEV initialization procedure, each EEV can move no more than 20
steps at a time.
12.5.4.3 EEV Operation when ODU changes to SB Mode
When the ODU mode is changed to SB, the following is performed immediately:
- EEV is set to 200.
- They remain in this position for 60 Sec.
- Then, performs reset (homing) procedure.
12.5.4.4 EEV Opening Determination
The target EEV value is the sum of open loop value (OL) and a result of the accumulative
correction values (CV).
12.5.4.5 EEV initial value determination
The EEV initial value (open loop) is determined according to the mode, and the capacity code
of the unit.
EEV Opening
60
Change
to Idle
EEV is initialized by
current EEV opening + 20
and defined as 0.
200
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Basic EEV open loop
Mode
WNG72 and 80
12 3 4
COOL 220 - - -
HEAT 210 - - -
12.5.4.6 Balance time
During the first 6 minutes after STBY the correction is not calculated. After that the correction
value is updated every 30 seconds.
12.5.4.7 EEV corrections
The corrections in cool mode will keep the compressor in the proper operation temperature and
will balance between the indoor units by controlling CTT-OMT.
12.5.4.8 Accumulative correction value storage
The accumulated EEV correction value will be stored in the memory. Default correction values
after power up are zero.
12.5.5 Outdoor Fan Speed Control
12.5.5.1 General Rules
o OFAN operates between OFMinRPM to OFMaxRPM.
o Min time for speed change of OFAN OFMinTimeReduce (60 seconds).
There are 4 defined speeds – High, Med, Low, and Very Low.
The actual OFAN speeds in cool mode are defined according to the following table:
Freq
Outdoor air temperature (OAT)
-10 -5 0 5 10 15 20 25 30 35 40 46
0 00000 0 000000
15
80 100 120 130 220 340 460 580 600 730 730 730
25 130 140 160 190 250 380 600 610 670 730 740 750
35 160 180 210 250 330 470 730 730 730 730 780 800
45 205 230 260 320 440 600 730 730 730 730 800 850
55 250 280 310 390 550 730 730 730 730 730 800 850
65 275 315 355 470 640 730 730 730 730 730 800 850
75
300 350 400 550 730 730 730 730 730 730 800 850
85
325 395 445 630 730 730 730 730 730 730 800 850
95
350 440 490 710 730 730 730 730 730 730 800 850
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The actual OFAN speeds in heat mode are defined according to the following table
Freq
Outdoor air temperature (OAT)
-15 -7 0 7 14 21 24
0 00000 0 0
15 850 850 750 750 500 350 300
25 850 850 750 750 520 370 320
35 850 850 750 750 540 390 340
45 850 850 750 750 560 410 360
55 850 850 750 750 580 430 380
65 850 850 750 750 600 450 400
75 850 850 750 750 620 470 420
85 850 850 750 750 640 490 440
95 850 850 750 750 650 500 450
12.5.5.2 Behavior when there is a failure in OFAN
Whenever OFAN fault occurs the compressor will be stopped immediately, except during
deicing protection, then the OFAN will be enabled to be started for maximum 5 times. This rule
is enabled each time the ODU switches to heat/cool modes.
12.5.5.3 Protection Behavior.
• When the IDU protection the OFAN will reduce OFSpdReducePrtC and OFSpdReducePrtH
RPM for cool and heat respectively.
• In cool mode the OFAN will operate according to CTT or HST protection level:
Protection level Action
SR, D1 or D2 OFAN will add 100 RPM to the target speed
Stop-Compressor
continue to operate for maximum 2 minutes at it last speed or until normal level is
achieved.
12.5.5.4 OFAN Force On condition
If HST is higher than 70°C or defined as “HST bad”, OFAN will remain ON at the last operating
speed for maximum 2 minutes after COMP is OFF.
12.5.5.5 Night mode
Upon receiving night mode, the OFAN will be limited to max NightRPM speed only in Cool. It
will be back to its normal operation when receiving the mode is cleared.
12.5.6 RV State Setting
During heat mode (except during Deicing) RV is ON.
During cool/SB mode RV is OFF.
RV status will be changed only if COMP is OFF for 3 minutes or more.
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12.5.7 Base Heater Setting
The base heater will be working only when RV is “ON” according to the following graph:
When OAT is faulty the base heater will be “ON” continuously in HEAT mode.
12.5.8 Thermodynamic Protections
12.5.8.1 Protection level definition
Five protection levels are defined:
Normal – No protection status is ON.
Stop-Rise (SR) – System is in protection, first level
D1 - System is in protection, second level
D2 - System is in protection third level
Stop-Compressor (SC) – System is in protection fourth level
12.5.8.2 IDU Protection Level
The ODU receives the protection levels from the IDU. The protection levels are weighted
according to the following table:
Protection Level Weight
Normal 0
Stop-Rise 1
D1 2
D2 3
Stop-Compressor 0
12.5.8.3 IDU Protections
12.5.8.3.1 Indoor Coil Defrost Protection
ICT
ICT Trend
Fast
Increasing
Increasing No change Decreasing
Fast
Decreasing
ICT < -2 SC SC SC SC SC
-2 ≤ ICT < 0 D1 D1 D2 D2 D2
0 ≤ ICT < 2 SR SR D1 D2 D2
2 ≤ ICT < 4 SR SR SR D1 D2
4 ≤ ICT < 6 Norm Norm SR SR D1
6 ≤ ICT < 8 Norm Norm Norm SR SR
8 ≤ ICT Normal
ON
OFF
OAT
0
2
Base
Heater
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12.5.8.3.2 Indoor Coil over Heating Protection
ICT
ICT Trend
Fast
Decreasing
Decreasing No Change Increasing
Fast
Increasing
ICT > 55 SC SC SC SC SC
53 < ICT ≤ 55 D1 D1 D2 D2 D2
49 < ICT ≤ 53 SR SR D1 D2 D2
47 < ICT ≤ 49 SR SR SR D1 D2
45 < ICT ≤ 47 Norm Norm SR SR D1
43 < ICT ≤ 45 Norm Norm Norm SR SR
ICT ≤ 43 Normal
12.5.8.4 ODU Protections
There are 3 ODU protections:
• Compressor overheating
• Heat sink overheating
• System over power
Operation logic of all protections is the same. The controlled input (CTT, HST, or PWR) is
controlled by changing the protection level using the fuzzy logic algorithm according the input
level and the change rate.
There are two sets of POWER values, the selection of the values are set according to the state
of the Power-Shed dry contact input.
Power-Shed input open Power1
Power-Shed input short Power2
The following table summarizes the basic levels of each protection.
Protection
level
Compressor
Overheat - cool
(CTT)
Compressor
Overheat - heat
(CTT)
Heat Sink
(HST)
Power1 Power2
Stop compressor 105 105 83 3600 2900
Down 2 100 100 81 3400 2750
Down 1 98 95 77 3200 2600
Stop rise 95 85 75 3100 2450
Normal 90 80 73 3050 2300
12.5.8.5 Total Protection Level Definition
The total protection level is defined by the higher level of protection received.
12.5.9 Deicing
12.5.9.1 Deicing Starting Conditions
Deicing operation will start when either one of the following conditions exist:
Case 1: OCT < OAT – DST 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 – DST
Case 5: NLOAD = 0 AND OCT < OAT - DST
Case 6: OAT is invalid AND OCT< DST AND TLD > DI AND Compressor ON Time > CTMR
minutes
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OCT – Outdoor Coil Temperature
OAT – Outdoor Air Temperature
TLD – Time from Last Deicing
DI – Deicing Interval (Time Interval between Two Deicing)
DST – Deicing static threshold (Temperature)
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.
12.5.9.2 Deicing Protection Procedure
T1 = T2 = 36 seconds, T3 = 6 seconds
12.5.10 Condensate Water over Flow Protection
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
COMP
RV
OFAN
EEV
ON
HEAT
COOL
ON
OFF
EEVDeicerOpen
Any
T1 T2
T3 T3
T1
12
0
Threshold
max. 12 minutes
DT
OCT
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12.5.10.1 3 Levels Logic (used in floor/ceiling models)
P2 P3 Level
00 L0
10 L1
1 1 L2&3
01 L4
Water Level
ANY
0
BLINK
NLOAD
OPER LED
LEVEL1
LEVEL2&3
LEVEL4
NORMAL
ON
Pump
OFF
12.5.10.2 1 Level Logic (used in all models except for floor/ceiling models)
P2 P3 Level
Don’t care 1 Normal
Don’t care 0 Overflow
ANY
0
ON
NLOAD
PUMP
OFF
ON
OPER
LED
OFF
Overflow
Water Level
Normal
BLINK
NLOAD is
forced to 0
8 min 8 min
Overflow when
unit is ON
Overflow when
unit is OFF
8 min
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1.6 Technician Test Mode (Valid For Single Units by
Connecting HMI Display only )
This test is aimed for the technicians to check the system under a preset compressor and
outdoor fan values while the expansion valves will function according to the normal running
mode.
12.6.1 Entering technician mode
o This mode is entered through the outdoor unit using the HMI (refer to user interface
section).
o It can be selected either for cool or heat.
o Technician test is not possible to enter during deicer.
12.6.2 Technician mode procedure
• All the connected indoor units will enter technician test at high indoor fan speed.
• The outdoor unit will be working normally (according to the run mode control logic) except the
following changes:
o The dry contacts inputs will be ignored.
o Protections will be operative for stop compressor (not to be implemented in the current
version).
o The compressor and the outdoor fan will be working in target preset values according to the
following table:
Technician Test
Unit
Compressor Speed
OFAN speed
Cool Heat
DCI 72/80 60 75 700 RPM
12.6.3 Exiting technician mode
Technician mode will be exited either when:
o Escaping by the HMI (exiting the ttC or ttH menus)
o 60 minutes are passed from entering
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12.7 User Interface
. LEDs Indicators – single split only
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:
No Problem 54321
1OCT bad 00001
2CTT bad 00010
3HST bad 00011
4OAT bad 00100
5OMT bad 00101
6RGT bad 00110
7 OFAN/Compressor Feedback Loss 00111
8 OFAN- IPM fault 01000
9OFAN Lock 01001
10 OFAN- Vospd exceeded 01010
11 Compressor- IPM Fault 01011
12 Compressor Lock 01100
13 Compressor- Vospd exceeded 01101
14 Compressor- Foldback 01110
15 DC under voltage 01111
16 DC over voltage 10000
17 AC under voltage 10001
18 No communication A 10010
19 reserved 10011
20 reserved 10100
21 reserved 10101
22 Compressor- Illegal Speed 10110
23 System Configuration Changed 10111
24 System Configuration Problem 11000
25 Heat sink Over Heating Fault/Protection 11001
26 Deicing Protection 11010
27 Compressor Over Heating Protection 11011
28 System over power Protection 11100
29 Bad EEPROM 11101
30 Not Configured 11110
31 Bad Communication 11111
Notes:
1 - ON, 0 - OFF
1. Whenever this table is updated, the installation test procedure, and the alarm output function
should be updated.
2. Only one code is shown.
3. Order of priority is 1-32. Diagnostics is continuously ON as long as power is on.
4. Heat Sink Over Heating Protection, Compressor Over Heating Protection, and System Over
Power Protection are declared only whenever in ‘Stop-Compressor’ status.
5. 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.
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6. Thermistor faults are reported only when they are enabled.
7. 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.
12.8 Jumper settings
12.8.1 Jumper definitions
0 = open (disconnected)
1 = closed (shorted)
Self test Jumper - J1
OPERATION
J1
SELF-TEST
1
NORMAL
0
Compensation Jumper – J2
Model J2 (Default) Compensation
Wall Mounted 0 Activated
Floor/Ceiling 1 Deactivated
Ducted/cassette 1 Activated
Family selection Jumper – J3, J4 and J5
Family J5 J4 J3
Reserved
Reserved
Reserved
Wall Mounted (WNG/FLO)
Floor/Ceiling (PXD)
Reserved
Ducted (LS)
Cassette (K)
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
IDU Model
Jumper Setting
J8 J7 J6 J5 J4 J3
WNG25 000011
WNG35 010011
WNG50 001000
WNG60 011000
WNG80 001001
PXD25 000100
PXD35 010100
PXD50 100100
K25 000111
K35 010111
K50 100111
LS35 010110
For wall mounted units Jumpers j7, j8 can be configured by service. All other jumpers on
the above table are factory default (cannot be changed by service).
For unit types as Cassettes, floor ceiling, and ducted, jumpers are set by a model plug.
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12.8.2 OFAN Jumpers
OFAN use parameters J2 J1
Panasonic- EHD80 0 0
Nidec SIC-71FW-F170-1 0 1
Shinano 1 0
EEPROM 1 1
12.8.3 Compressor Jumpers
Compressor use parameters J3
TNB220FLBM (ROM) 0
EEPROM 1
12.9 System Parameters
12.9.1 General parameters
Parameter Default Value
ODUCodeLimit 6
Model selection Jumper – J7, J8
Model J8 J7
A
B
C
D
0 0
0 1
1 0
1 1
J9- Presence Detector/Power Shedding
OPERATION J9
Presence Detector 0
Power Shedding 1
Jumper – J10
OPERATION J10
WNG DCI LCD 0
LED 1
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12.9.2 Protection Parameters
Deicer Parameters
Parameter Default
DST 8
DSTF 12
DIF (min) 30
CTMR (min) 15
TimeD (min) 1
DIT (min) 10
DTmin (min) 3
DImin (min) 30
DImax (min) 120
DeicSPChRV 0
EEVDeicerOpen 180
DEICT1 (sec) 50
DEICT2 (sec) 36
DEICT3 (sec) 6
OptimDeicSP 90
12.9.3 Compressor Parameters
Compressor Parameters Value
MinOFFTime 3
MinOnTime 3
MaxSpeedC 75
MaxSpeedH 95
Step1RPS 40
Step2RPS 60
Step3RPS 75
12.9.4 OFAN parameters
EEV Parameters Value
OFMinRPM 150
OFMaxRPM 1000
NightRPM 650
OFMinTimeReduce (Sec) 60
OFLowSpC 35
OFMedSpC 50
OFLowSpH 40
OFMedSpH 65
12.9.5 Indoor Units SW Parameters
12.9.5.1 General Parameters for All Models:
Parameters defining the indoor fan speed as a function of Indoor Coil temperature in
heat mode (ICT):
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12.9.5.1.1 Parameters for defrost protection:
ICTST Speed ICT to stop indoor fan 25
ICTVLSpeed ICT to go down to very low speed 28
ICTLSpeed ICT to start in very low speed 30
ICTHSpeed ICT to start in increase speed from very low 32
ICTTSpeed ICT to enable Turbo fan speed 40
ICTDef1 ICT to go back to normal 8
ICTDef2 ICT to ‘stop rise’ when ICT decrease 6
ICTDef3 ICT to ‘stop rise’ when ICT is stable 4
ICTDef4 ICT to ‘Hz Down’ when ICT decrease 2
ICTDef5 ICT to ‘Hz Down’ when ICT is stable 0
ICTDef6 ICT to stop compressor -2
12.9.5.1.2 Parameters for indoor coil over heating protection:
ICTOH1 ICT to go back to normal 45
ICTOH2 ICT to ‘stop rise’ when ICT increase 48
ICTOH3 ICT to ‘stop rise’ when ICT is stable 52
ICTOH4 ICT to ‘Hz Down’ when ICT increase 55
ICTOH5 ICT to ‘Hz Down’ when ICT is stable 60
ICTOH6 ICT to stop compressor 62
12.9.6 Model Depended Parameters:
Parameter name
(WNG) Wall Mounted Models
25 35 50 60 72 80
NLOAD limits as a function of selected indoor fan speed
MaxNLOADIF1C 40 40 45 50 53 68
MaxNLOADIF2C 53 53 62 85 75 90
MaxNLOADIF3C 120 120 120 120 105 120
MaxNLOADIF4C 127 127 127 127 127 127
MaxNLOADIF5C 127 127 127 127 127 127
Indoor Fan speeds
IFVLOWC 700 700 700 800 850 850
IFLOWC 800 800 900 1000 1000 1000
IFMEDC 900 950 1050 1100 1150 1150
IFHIGHC 1050 1100 1200 1250 1350 1300
IFTURBOC 1150 1200 1250 1300 1400 1350
IFVLOWH 700 700 700 800 900 900
IFLOWH 800 850 900 950 1050 1050
IFMEDH 950 1000 1100 1150 1200 1200
IFHIGHH 1100 1150 1250 1250 1350 1300
IFTURBOH 1200 1250 1300 1300 1400 1350
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13. TROUBLESHOOTING WNG 50 60 DCI
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 4 Min. to discharge the system.
Touching the controller before discharging may cause an electrical shock!!!
13.1 Single Split system failures and corrective actions
No
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
1
Power supply indicator
(Red LED) does not light
up.
No power supply
Check power supply. If power supply
is OK, check display and display
wiring. if OK, replace controller.
2
Unit does not respond to
remote control message Remote control message
not reached the indoor
unit
Check remote control batteries, if
batteries are OK, check display and
display wiring, if OK, replace display
PCB.
If still not OK replace controller.
3
Unit responds to remote
control message but
Operate indicator (Green
LED) does not light up
Problem with display
PCB
Replace display PCB.
If still not OK replace controller.
Unit in heat mode and
coil is still not warm.
Change to cool mode and check.
4
Indoor fan does not start
(louvers are opened and
Green LED does light up)
Problem with PCB or
capacitor
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 replace controller
5
Indoor fan works when
unit is OFF, and indoor
fan speed is not changed
by remote control
command.
PCB problem
Replace controller
6
Compressor does not
start
Electronics control
problem or protection
Perform diagnostics , and follow the
actions described.
7
Compressor stops during
operation and Green
LED remains on
Electronic control or
power supply problem
Perform diagnostics ,and follow the
actions described.
8
Compressor is on but
outdoor fan does not
work
Problem with outdoor
electronics or outdoor fan
Check outdoor fan motor according
to the procedure in section, if not OK
replace controller
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No
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
9
Unit works in wrong
mode (cool instead of
heat or heat instead of
cool)
Electronics or power
connection to RV
Check RV power connections, if OK,
Check RV operation with direct
230VAC power supply, if OK,
Replace outdoor controller.
10
All components are
operating properly but no
cooling or no heating
Refrigerant leak Check refrigeration system.
11
Compressor is over
heated and unit does not
generate capacity
EEV problem Check EEV
12
Units goes into
protections and
compressor is stopped
with no clear reason
Control problem or
refrigeration system
problem
Perform diagnostics and follow the
actions described.
13
Compressor motor is
generating noise and no
suction occurs
Phase order to
compressor is wrong
Check compressor phase order.
14
Water leakage from
indoor unit
Indoor unit drainage tube
is blocked
Check and open drainage tube.
15
Freezing of outdoor unit
in heat mode and
outdoor unit base is
blocked with ice
Connect base heater.
16
Unit operates with wrong
fan speeds or wrong
frequency
Wrong jumper settings
Perform diagnostics, and check if
units is operating by EEPROM
parameters.
13.2 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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13.3 Judgment by Indoor/Outdoor Unit Diagnostics
Enter diagnostics mode - press for five seconds Mode/Reset button in any
operation mode. Acknowledgment is by 3 short beeps and lights of all Display
LED’s. Then, The units will enter into Indoor and Outdoor unit diagnostic
modes.
During the Outdoor unit diagnostics all three Indoor LED’s (STBY/Operate,
Filter and Timer) are blinking. When Indoor diagnostics is displayed, all three
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 Filter
& Timer LEDs.
The coding method will be as follows:
Filter LED will blink 5 times in 5 seconds, and then will be shut off for the next 5
seconds. Timer LED will blink during the same 5 seconds according to the following
Indoor / Outdoor unit tables:
Note: 0 – OFF, 1-ON
13.3.1 Indoor unit Diagnostics
No Problem 5 4 3 2 1
1
RT-1 is disconnected
2
RT-1 is shorted
3
RT-2 is disconnected
4
RT-2 is shorted
5
Reserved
7
Communication mismatch
8
No Communication
9
No Encoder
10
Reserved 0 1 0 1 0
11
Outdoor Unit Fault 0 1 0 1 1
…
Reserved
17
Defrost protection
18
Deicing Protection
19
Outdoor Unit Protection
20
Indoor Coil HP Protection
21
Reserved
22
Reserved
24
EEPROM Not Updated
25
Bad EEPROM
26
Bad Communication
27
Using EEPROM data
28
Model A
29
Model B
30
Model C
31
Model D
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13.3.2 Indoor unit diagnosis and corrective actions
No. Fault Probable Cause Corrective Action
1
Sensor failures of all
types
Check sensor connections or
replace sensor
2
Communication
mismatch
Indoor and Outdoor controllers are
with different versions
Replace Indoor controller
3
No Communication
Communication or grounding wiring is
not good.
Check Indoor to Outdoor wiring
and grounding
4
No Encoder
Indoor electronics or motor Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
5
Outdoor Unit Fault
Outdoor controller problem Switch to Outdoor diagnostics.
6
EEPROM Not
Updated
System is using ROM parameters and
not EEPROM parameters
No action, unless special
parameters are required for
unit operation.
7
Bad EEPROM
No action, unless special
parameters are required for
unit operation.
8
Bad Communication
Communication quality is low reliabilit
y
Check Indoor to Outdoor wiring
and grounding
9
Using EEPROM
data
No problem. System is using
EEPRRRROM parameters
13.3.3 Outdoor Unit Diagnostics
No Problem 5 4 3 2 1
1 OCT is disconnected
0 0 0 0 1
2 OCT is shorted
0 0 0 1 0
3 CTT is disconnected
0 0 0 1 1
4 CTT is shorted
0 0 1 0 0
5 HST is disconnected (when enabled)
0 0 1 0 1
6 HST is shorted (when enabled)
0 0 1 1 0
7 OAT is disconnected (when enabled)
0 0 1 1 1
8 OAT is shorted (when enabled)
0 1 0 0 0
9 TSUC is disconnected (when enabled)
0 1 0 0 1
10 TSUC is shorted (when enabled)
0 1 0 1 0
11 IPM Fault
0 1 0 1 1
12 Bad EEPROM
0 1 1 0 0
13 DC under voltage
0 1 1 0 1
14 DC over voltage
0 1 1 1 0
15 AC under voltage
0 1 1 1 1
16 IDU/ODU Communication mismatch
1 0 0 0 0
17 No Comm
unication
1 0 0 0 1
18 Reserved
1 0 0 1 0
20 Heat sink Over Heating
1 0 1 0 0
21 Deicing
1 0 1 0 1
22 Compressor Over Heating
1 0 1 1 0
23 Compressor Over Current
1 0 1 1 1
24 No OFAN Feedback
1 1 0 0 0
25 OFAN locked
1 1 0 0 1
26 Compressor Lock
1 1 0 1 0
27 Bad Communication
1 1 0 1 1
1 - ON, 0 - OFF
Only one code is shown. Order of priorety is 1-24. Diagnostics is continuously ON as long
power is on.
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13.3.4 Outdoor unit diagnosis and corrective actions
NO
Fault
Probable Cause Corrective Action
1
Sensors failures of all
types
Check sensors connections
or replace sensors.
2
IPM Fault
Electronics HW
problem
Check all wiring and jumper
settings, if OK, replace
electronics.
3
Bad EEPROM
No action, unless special
parameters are required for
unit operation.
4
DC under/over Voltage
Electronics HW
problem
Check outdoor unit power
supply voltage
5
AC under Voltage
Check outdoor unit power
supply voltage
6
Indoor / Outdoor unit
Communication mismatch
Indoor and Outdoor
controllers are with
different versions
Replace Indoor controller
7
No Communication
Communication or
grounding wiring is not
good.
Check Indoor to Outdoor
wiring and grounding
8
Compressor Lock
Switch unit to STBY and
restart
9
Bad Communication
Communication quality is
low reliability
Check Indoor to Outdoor
wiring and grounding
13.4 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.
13.5 Simple procedures for checking the Main Parts
13.5.1 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).
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13.5.2 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.
13.5.3 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
13.5.4 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).
13.5.5 Checking the Reverse Valve (RV).
Running in heating mode, check the voltage between two pins of
reverse valve connector, normal voltage is 220VAC.
13.5.6 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.
13.6 Precaution, Advise and Notice Items
13.6.1 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.
13.6.2 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 four minutes after power is off.
Touching the Outdoor unit controller before discharging may cause an
electrical shock.
13.6.3 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 housin
g
, don’t pull the wire.
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14 TROUBLESHOOTING WNG 80 DCI
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!!!
For safe handling of the controller please refer to section 2.5 below.
14.1 General System Failures and Corrective Actions
No SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
1.
Indoor unit power supply indicator
(Red LED) does not light up.
No power supply
Check power supply. If OK,
check display and display
wiring. if OK, replace controller
2.
Indoor unit does not respond to
remote control message
Remote control message
not reached the indoor
unit
Check remote control
batteries, if OK, check display
and display wiring, if OK,
replace display PCB. If still not
OK replace controller
3.
Indoor unit responds to remote
control message but Operate
indicator (Green LED) does not light
up
Problem with display PCB
Replace display PCB.
If still not OK replace controller
4.
Indoor fan does not start (louvers are
opened and Green LED is ON)
Unit in heat mode and coil
is still not warm
Change to cool mode
Outdoor unit is in opposite
mode
Change operation mode
Problem with controller or
capacitor
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.
Indoor fan works when unit is OFF,
and indoor fan speed is not changed
by remote control command.
Controller problem Replace controller
6. Water leakage from indoor unit
Indoor unit drainage tube
is blocked
Check and open drainage tube
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No SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
7.
One indoor unit or more are
operating in cool mode with no
capacity, and the other units have
water leaks/freezing problems
The communication wires
of the indoor units are
switched
Check and correct the
communication wires
connection
8.
One indoor or more are operating in
heat mode with a limited capacity,
and the coil on the other units are
very hot.
9
Outdoor unit display board and leds
are off
No power supply
Check the connections and the
wiring on the main terminal Repair if needed.
PFC Chock coil
Check the PFC Chock coil
( 2.4.3)
Burnt fuse
Check 20A fuse on the Filter
( 2.4.2)
10.
Compressor operates but one or
more units generates no capacity
EEV problem Check EEV ( 2.4.7)
Refrigerant leakage
Check refrigeration system
( 2.2)
Indoor coil block
Clean filters and/or remove
block
Outdoor coil block
Remove block and/or avoid air
by-pass
11.
Compressor is over heated and unit
does not generate capacity
EEV problem Check EEV ( 2.4.7)
Refrigerant leakage
Check refrigeration system
( 2.2)
Indoor coil block
Clean filters and/or remove
block
Outdoor coil block
Remove block and/or avoid air
by-pass
12. Compressor stops during operation
Electronic control
Check diagnostics (see 2.3
below)
Refrigerant leakage
Check refrigeration system
( 2.2)
13. Not all units are operating Communication problems
Check diagnostics (see 2.3
below)
14. Compressor does not start
Electronics control
problem or protection
15.
Unit works in wrong mode (cool
instead of heat or heat instead of
cool)
Electronics or RV problem Check RV ( 2.4.6)
16.
All components are operating
properly but no cooling or no heating
Refrigerant leak
Check refrigeration system
( 2.2)
17.
Compressor motor is generating
noise and no suction occurs
Phase order to
compressor is wrong
Check compressor phase
order
18.
Freezing of outdoor unit in heat mode
and outdoor unit base is blocked with
ice
Connect base heater
19.
The unit stop suddenly during
operation
EMC interference to the
A/C unit
Check for EMC problems
(
2.4.10.1)
20.
Indoor unit(s) Indicator(s) leds may
flicker
21.
Other home appliances operation is
faulty such as noise appears in the
television picture, or the picture is
distorted or static occurs in the radio
sound
EMC interference by the
A/C unit
Check for EMC problems
( 2.4.10.2)
22 All others
Specific problems of
indoor or outdoor units
Check diagnostics (see 2.3
below)
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14.2 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.
For entering technician mode check 1.6.
14.3 Diagnostics
14.3.1 Outdoor unit diagnostics
LEDs Indicators – single split only
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:
No Problem 5 4 3 2 1
1 OCT bad 0 0 0 0 1
2 CTT bad 0 0 0 1 0
3 HST bad 0 0 0 1 1
4OAT bad 00100
5 OMT bad 0 0 1 0 1
6 RGT bad 0 0 1 1 0
7 OFAN/Compressor Feedback Loss 0 0 1 1 1
8 OFAN- IPM fault 0 1 0 0 0
9 OFAN Lock 0 1 0 0 1
10 OFAN- Vospd exceeded 0 1 0 1 0
11 Compressor- IPM Fault 0 1 0 1 1
12 Compressor Lock 0 1 1 0 0
13 Compressor- Vospd exceeded 0 1 1 0 1
14 Compressor- Foldback 0 1 1 1 0
15 DC under voltage 0 1 1 1 1
16 DC over voltage 1 0 0 0 0
17 AC under voltage 1 0 0 0 1
18 No communication A 1 0 0 1 0
19 reserved 1 0 0 1 1
20 reserved 1 0 1 0 0
21 reserved 1 0 1 0 1
22 Compressor- Ilegal Speed 1 0 1 1 0
23 System Configuration Changed 1 0 1 1 1
24 System Configuration Problem 1 1 0 0 0
25 Heat sink Over Heating Fault/Protection 1 1 0 0 1
26 Deicing Protection 1 1 0 1 0
27 Compressor Over Heating Protection 1 1 0 1 1
28 System over power Protection 1 1 1 0 0
29 Bad EEPROM 1 1 1 0 1
30 Not Configured 1 1 1 1 0
31 Bad Communication 1 1 1 1 1
Notes:
1 - ON, 0 - OFF
1. Whenever this table is updated, the installation test procedure, and the alarm output
function should be updated.
2. Only one code is shown.
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3. Order of priority is 1-32. Diagnostics is continuously ON as long as power is on.
4. Heat Sink Over Heating Protection, Compressor Over Heating Protection, and System Over
Power Protection are declared only whenever in ‘Stop-Compressor’ status.
5. 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.
6. 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 indoo
r
14.3.2 Outdoor fault corrective actions
No Fault Name Fault Description Corrective Action
1 OCT bad
Thermistor not connected or
damaged
Check Thermistor ( 2.4.8)
2 CTT bad
3 HST bad
4 OAT bad
5 OMT bad
6 RGT bad
7
OFAN/Compressor
Feedback Loss
OFAN halls or wires bad.
Compressor wire cable bad or IPM
bad or compresor bad
Check OFAN motor ( 2.4.4) and
compressor ( 2.4.5)
8 OFAN - IPM fault
Over current / Over temperature of
OFAN IPM
Check no obstruction to controller air
opening
Check OFAN motor ( 2.4.4)
Check motor type matches motor
jumpers in controller
9 OFAN Lock Fan does not rotate Check OFAN motor ( 2.4.4)
10
OFAN- Vospd
exceeded
Exceeds speed high limit
Check motor type matches motor
jumpers in controller
Make necessary arrengments in unit
installation location to avoid back
wind
Avoid EMC problems ( 2.4.10.1)
11
Compressor- IPM
Fault
Over current / Over temperature of
compressor IPM
Check no obstruction to controller air
opening
Check Compressor ( 2.4.5)
12 Compressor Lock Compressor does not rotate Check Compressor ( 2.4.5)
13
Compressor- Vospd
exceeded
Exceeds speed limit
Try again and replace controller if still
have the problem
14
CompressorFoldback
High pressure / Current reduces
compressor speed
Check Compressor ( 2.4.5)
15 DC under voltage DC voltage is lower than limit Replace controller
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No Fault Name Fault Description Corrective Action
16 DC over voltage DC voltage exceeds its high limit
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
17 AC under voltage AC input voltage is lower than limit
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
18 No communication A No signals in line A Check communication ( 2.4.9)
22
Compressor- Ilegal
Speed
Exceeds speed low limit See # 13
23
System Configuration
Changed
Communication lines changed from
last operation
No problem just an announcement
24
System Configuration
Problem
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
Change configuration if needed.
25
Heat sink Over
Heating Fault/
Protection
Compressor stopped due to
heatsink protection
Check that the airflow around the
ODU is free and the fan is running
free. Check fan motor ( 2.4.4)
26 Deicing Protection During deicing procedure No action required
27
Compressor Over
Heating Protection
Compressor stopped due to over
heat protection
Check if gas is missing in the system
28
System over power
Protection
Compressor stopped due to over
power protection
No action required
29 Bad EEPROM EEPROM not operating
Power reset. (Replace Controller just
in case you need EEPROM).
30 Not Configured Cannot start the control
Power reset. Replace Controller if
didn’t help
31 Bad Communication Bad communication lines See # 18-21
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14.3.3 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.
When Indoor diagnostics is displayed, all four LED’s (STBY, Operate, Filter, TMR) are on.
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:
No Fault Name 54321
1 RT-1 is disconnected
00001
2 RT-1 is shorted
00010
3 RT-2 is disconnected
000
11
4 RT-2 is shorted
00
1
00
… Reserved
00
1
0
1
7 Communication mismatch
00
111
8 No Communication
0
1
000
9 No Encoder
0
1
00
1
10 Reserved 01010
11 Outdoor Unit Fault 01011
… Reserved
17 Defrost protection 1
000
1
18 Deicing Protection 1
00
1
0
19 Outdoor Unit Protection 1
00
11
20 Indoor Coil HP Protection 1
0
1
00
21 Overflow Protection 1
0
1
0
1
… Reserved
24 EEPROM Not Updated 1 1
000
25 Bad EEPROM 1 1
00
1
26 Bad Communication 1 1
0
1
0
27 Using EEPROM data 1 1
0
11
28 Model A 1 1 1
00
29 Model B 1 1 1
0
1
30 Model C 1111
0
31 Model D 11111
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.
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14.3.4 Indoor unit diagnostics and corrective actions
No. Fault Probable Cause Corrective Action
1-4 Sensor failures
Sensors not connected or
damaged
Check sensor connections or
replace sensor
7
Communication
mismatch
Indoor and Outdoor controllers
are with different versions
Replace Indoor controller
8 No Communication
Communication or grounding
wiring is not good
Check Indoor to Outdoor wiring
and grounding
9 No Encoder Indoor electronics or motor
Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
11 Outdoor Unit Fault Outdoor controller problem Switch to Outdoor diagnostics.
17-21 Protections Indication No action
24 EEPROM Not Updated
System is using ROM parameters
and not EEPROM parameters
No action, unless special
parameters are required for unit
operation.
25 Bad EEPROM
No action, unless special
parameters are required for unit
operation.
26 Bad Communication
Communication quality is low
reliability
Check Indoor to Outdoor wiring
and grounding
27 Using EEPROM data No problem
28-31 IDU model
14.4 Procedures for checking Main Parts
14.4.1 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).
14.4.2 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.
14.4.3 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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Service Manual - WNG 50_60_80 DCI
14.4.4 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.
14.4.5 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.
14.4.6 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.
14.4.7 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 (see Error!
Reference source not found.) 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).
14.4.8 Checking the termistors
Check Thermistor connections and wiring - Repair if needed.
Check Thermistor resistance – between 0ºC and 40ºC should be between 35KΩ and 5KΩ.
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14.4.9 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.
14.4.10 Checking for electromagnetic interferance (EMC problems)
14.4.10.1 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.
14.4.10.2 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.
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14.5 Precaution, Advise and Notice Items
14.5.1 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.
14.5.2 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.
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.
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15. EXPLODED VIEWS AND SPARE PARTS LISTS
15.1 Indoor Unit: Delta WNG 50 / WNG 60 DCI
23
22
20
21
8
19
6
7
4
5
3
1
2
0
24
25
26
27
29
28
30
32
31
34
33
35
36
B
37
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15.2 Intdoor Unit: WNG 50/60 DCI
NO. Part No. Description Quantity
1A 452917400 Grill A/WNG18 1
1B 452952800 Grill B/WNG18 1
1C 452952900 Grill C/WNG18 1
2A 453080400 Display Board Assy.906-257-00 1
3 452919800 Filter 2
4 4518113 Fiber Filter Assy. (Optional) 1
5 453054000 Frame assy./WNG18 1
6A 4526946 Display Lens Assy(LCD) 1
6B 4527144 Display Cover Assy 1
7 452919600 Screw cover 3
8 433133 IONIZER DISPLAY 906-191-07 (Optional) 1
8A 452919700 Cover/Ionizer (Optional) 1
9 453134600 Evaporator Assy. 1
10 4518664 Drain hose 1
11 452917300 Air outlet 1
12 453050200 STEP MOTOR A 1
13 452918700 Support/horizontal louver 2
14 452917500 Horizontal flap A 1
15 452917600 Horizontal flap B 1
16 452918500 Linkage A 1
452918600 Linkage B 1
17 452930700 Vertical flap A 12
452918200 Vertical flap B 2
18 452918300 Tie/vertical flap A 1
452918400 Vertical flap stator B 2
452953000 Vertical flap stator C 1
19 4518662 Bearing assy fan 1
20 453024900 Impeller fan 1
21 453053800 Base assy./WNG18 1
22 4518657 TUBE LOCK 1
23 452920100 Mount bracket/WNG-18 20 1
24 452919400 J oint/Unit housing 1
25 453024500 PG Motor 1
26 4518651 Cover Side Motor 1
27 452918800 Cover/motor 1
28 453042500 Remote controller/RC4-I-1 EHK P/N 974-710-00 1
29 453050300 STEP MOTOR B 1
30 453057900 Gear BOX ASSY 1
31 453109300 Wire UL100726AWG/Ionizer 1
32 433134 IONIZER POWER 906-191-01 (Optional) 1
33 4517022 Plug 1
34 4524967 IONIZER WIRE A (Optional) 1
35 453030600 Indoor DC Inverter Controller(ENGLISH)916-513-00 1
36 4524963 Electrostatic Filter (Optional) 1
37 452919500 Cover/terminal 1
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15.3 Outdoor Unit: ONG3-50 DCI
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15.4 Outdoor Unit: ONG3-50 DCI
No. Part No. Description Unit
1 433218 Front panel A 1
2 4526340 Air inlet ring-420 1
3 433223 Painting insulation plate 1
4 4526476 Axial fan OD=401 1
5 4526475 DC motor for DCI 50 1
6 4526457 Motor support 1
7 4527363 Base painting Assy. 1
8 4526459 Partition 1
9 4526203 Outdoor DC inverter controller (English) 1
10 4524595 Gas valve (R410A) 1
11 4524176 Liquid valve(R410A) 1
12 4526224 EMI fliter board 901-098-00 1
13 4526396 Chock Assy. 167-021-01 1
14 4526223 AC-IN connected wire 1
15 4526968 Earthing wire for DCI 1
16 4526222 Fuse connecting wire 1
17 4526300 Therminal sheet 1
18 4526220 Fuse stand JEF-511B(EHK P/N:150-038-00) 1
19 4526533 Fuse 65TS(20A,230)150-031-00 1
20 204107 Cable clip nylon 1
21 4519188 4 poles terminal block 1
22 433229 Value cover 1
23 4522509 4-Way valve coil 1
24 4527327 4-way valve welding Assy. 1
25 4518952 4-way valve 1
26 4526221 Compressor wire 1
27 4523446 DC Inverter compressor Assy. 5CS130XCC03 1
28 4526775 Compressor top thermistor(CTT) 1
29 4526774 Outside air thermistor(OAT) 1
30 4526776 Outside coil thermistor(OCT) 1
31 4526969 Suction coil thermistor(SUCT) 1
32 4526215 Electronic expansion valve ZDPF(L)-1.6C-01-RK forR410A 1
33 4526216 EEV COIL QA(L)12-HR-01A-RK 1
34 4519606 Right side panel 1
35 433228 Back side net 1
36 4526459 Condenser soldering assy 1
37 4526298 Bridge 1
38 4519614 Painting top cover 1
39 4526480 Gasket for axial fan 1
40 4519300 Nut M5 L 1
41 433225 Handle 1
42 4519607 Left side panel painting plate 1
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