Page 1
EMD series
REFRIGERANT
R22
R407C
HEAT PUMP
COOLING ONLY
JULY 2005
Indoor Units Outdoor Units
EMD 27 OU6-27
EMD 35 OU8-33
EMD 40 OU10-38
EMD 45 OU10-44
EMD 50 OU10-50
EMD 60 OU12-60
Service Manual
Page 2
A
LIST OF EFFECTIVE PAGES
Revision Y05-01
Service Manual - EMD Series
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 ........ July 2005
Total number of pages in this publication is 109 consisting of the following:
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Title ....................... 0
A ........................... 0
i ............................. 0
1-1 - 1-2 ................ 0
2-1 - 2-17 .............. 0
3-1 ........................ 0
4-1 - 4-3 ................ 0
5-1 - 5-7 ................ 0
6-1 - 6-6 ................ 0
7-1 - 7-33 .............. 0
8-1 - 8-2 ................ 0
9-1 - 9-35 .............. 0
• 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 Y05-01
Service Manual - EMD Series
Table of Contents
1. FEATURES ............................................................................................................1-1
2. PRODUCT DATA SHEET ......................................................................................2-1
3. RATING CONDITIONS ..........................................................................................3-1
4. OUTLINE DIMENSIONS .......................................................................................4-1
5. WIRING DIAGRAMS .............................................................................................5-1
6. REFRIGERATION DIAGRAMS .............................................................................6-1
7. CONTROL SYSTEM .............................................................................................7-1
8. TROUBLESHOOTING ..........................................................................................8-1
9. EXPLODED VIEWS AND SPARE PARTS LISTS .................................................9-1
Page 4
1-1
FEATURES
Revision Y05-01Service Manual - EMD Series
1. FEATURES
MODES OF OPERATION , FUNCTIONS AND FEATURES
The air conditioner is based on a microcomputer control system with remote wall mounted LCD display and
control unit, programmed for the following modes and functions
:
Cools, dehumidifies and filters the room air. Maintains desired site temperature.
COOL
Heats and filters the air. Maintains desired site temperature.
HEAT
Automatically switches from COOLING to HEATING or from HEATING to
COOLING, maintaining the desired temperature according to the room conditions.
AUTO
Dehumidifies and moderately cools the room. In DRY Mode the air conditioner
operates at an increased dehumidifying power. This function is recommended to
be used when temperature is rather cool but the humidity is high.
DRY
Recalculates and filters the room air. Maintains constant air movement in the
room.
FAN
The air conditioner automatically selects the FAN speed in accordance to the
room temperature. At the start, the unit operates at high fan speed. As the room
air gets closer to the desired temperature, the fan switches on a lower speed for
quieter operation.
AUTO FAN
In HEATING and in AUTO FAN, the fan will be turned off when the compressor is
not in operation and will not be restarted, unless the indoor coil reaches adequate
temperature. This HOT KEEP feature prevents uncomfortable cold air drafts.
AUTO FAN Is therefore, recommended to be used when the air conditioner is in
HEATING mode.
HOT KEEP
Switches the temperature sensing point to the place where the remote control is
located (in normal operation the temperature sensor is located behind the intake
grille of the air conditioner). This function is designed to provide a personalized
environment by transmitting the temperature control information from where the
remote control is placed. The communication between the remote control and the
central control unit is done by infrared signal. When using this function, the remote
control should always be aimed without obstructions at the air conditioner.
I FEEL
Real time control and display, automatically turns the air conditioner ON or OFF
according to the time of day setting, ensuring comfort conditions before returning
home, without wasting electricity. It turns off the air conditioner automatically when
sleeping.
TIMER
Designed to automatically reset the temperature setting. In COOLING mode the
temperature rises one degree centigrade after each consecutive hour, up to three
hours, from the start of the mode. In HEATING mode, the reverse occurs, the air
conditioner lowers its temperature one degree every hour. When in SLEEP Mode,
the operation will automatically turn off after seven hours. This function saves
energy when the air conditioner is operating during off hours.
SLEEP
Page 5
1-2
FEATURES
Revision Y05-01 Service Manual - EMD Series
Not Applicable in Ducted unit.
VERTICAL
AIR SWING
Not Applicable in Ducted unit.
AIR
DIRECTION
POSITIONING
Measures and displays room temperature.
ROOM TEMP.
Filter indicator on the indoor unit display is turned on when the filter requires
cleaning. After cleaning and reinstalling the filter, the system should be reset.
FILTER
INDICATION
A soft buzzer will sound from the indoor unit display to indicate that a
command sent by the remote control has been accepted and stored in the
unit’s memory. This feature may be easily canceled by the user from the
display panel.
BUZZER
The air conditioner can be turned ON for COOLING or HEATING or be turned
OFF directly from the indoor unit display panel without the use of the remote
control.
ON UNIT
OPERATION
The compressor is protected by a three minute delayed restart.
3-MIN
DELAYED
RUN
The microprocessor retains the last data entry whether or not the unit is plugged
in. Therefore, when the unit restarts after a power disruption or power failure, it will
resume operation in the same mode as before the power disruption.
MEMORY
Freezes the last operation setting on the remote control. When LOCK is activated,
the remote control will not be able to control the air conditioner.
LOCK
Page 6
2-1
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
2. PRODUCT DATA SHEET
2.1 R22/R407C
Model (Indoor & Outdoor)
EMD 27 & OU6-27 RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 26600 27300
Capacity
Kw 7.8 8.0
Power input Kw 2.8 2.4
COP W/W 2.79 3.28
Power supply V/Hz/Ph 230V/50Hz/1PH
Rated current A 11.6 10.0
Starting current A 67
Circuit breaker rating A 20
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 900 800 700
Air flow * H/ M/ L M³/Hr 1800 1560 1300
External static pressure Min-Max Pa 25 - 70
Sound power level ** H/ M/ L dBa 68.2 65.5 61.3
Sound pressure level *** H/ M/ L dBa 54.3 51.5 48.5
Moisture removal Lt/Hr 1.7
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 32
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 34
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 1
Fan speeds H / L RPM 920
Air flow H / L M³/Hr 2350
Sound power level H / L dBa 69
Sound pressure level *** H / L dBa 62
Dimensions W/ H / D mm 900 580 340
Weight Kg 64
Package dimensions W/ H / D mm 985 640 410
Package weight Kg 67
Units per pallet Units 9
Stacking height Units 3
Refrigerant type R22
Charge / Distance Kg/ M 2.1/ 7.5
Additional charge per 1 meter Grams 25
Liquid line Inch 3/8
Suction line Inch 5/8
Max. tubing length Meter 25
OUTDOOR
Connections
between
units
Max. height difference Meter 10
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 7
2-2
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 27 & OU6-27 ST R22
Installation method Ducted
Characteristics Units Cooling
Btu/Hr 26600
Capacity
Kw 7.8
Power input Kw 2.8
COP W/W 2.79
Power supply V/Hz/Ph 230V/50Hz/1PH
Rated current A 11.6
Starting current A 67
Circuit breaker rating A 20
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 900 800 700
Air flow * H/ M/ L M³/Hr 1800 1560 1300
External static pressure Min-Max Pa 25 - 70
Sound power level ** H/ M/ L dBa 68.2 65.5 61.3
Sound pressure level *** H/ M/ L dBa 54.3 51.5 48.5
Moisture removal Lt/Hr 1.7
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 32
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 34
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 1
Fan speeds H / L RPM 920
Air flow H / L M³/Hr 2350
Sound power level H / L dBa 69
Sound pressure level *** H / L dBa 62
Dimensions W/ H / D mm 900 580 340
Weight Kg 64
Package dimensions W/ H / D mm 985 640 410
Package weight Kg 67
Units per pallet Units 9
Stacking height Units 3
Refrigerant type R22
Charge / Distance Kg/ M 2.1/ 7.5
Additional charge per 1 meter Grams 25
Liquid line Inch 3/8
Suction line Inch 5/8
Max. tubing length Meter 25
OUTDOOR
Connections
between
units
Max. height difference Meter 10
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 8
2-3
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 35 & OU8-33 RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 32500 34800
Capacity
Kw 9.5 10.1
Power input Kw 3.3 2.9
COP W/W 2.87 3.53
Power supply V/Hz/Ph 230V/50Hz/1PH
Rated current A 14.4 12.3
Starting current A 76
Circuit breaker rating A 20
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 890 800 680
Air flow * H/ M/ L M³/Hr 1770 1570 1300
External static pressure Min-Max Pa 37 - 80
Sound power level ** H/ M/ L dBa 68.2 65.5 61.3
Sound pressure level *** H/ M/ L dBa 54.3 51.5 48.5
Moisture removal Lt/Hr 2.7
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 1
Fan speeds H / L RPM 850
Air flow H / L M³/Hr 3110
Sound power level H / L dBa 69
Sound pressure level *** H / L dBa 62
Dimensions W/ H / D mm 900 860 340
Weight Kg 78
Package dimensions W/ H / D mm 985 900 410
Package weight Kg 82
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.33 / 7.5
Additional charge per 1 meter Grams 25
Liquid line Inch 3/8
Suction line Inch 5/8
Max. tubing length Meter 30
OUTDOOR
Connections
between
units
Max. height difference Meter 10
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 9
2-4
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 35 & OU8-33 ST R22
Installation method Ducted
Characteristics Units Cooling
Btu/Hr 32500
Capacity
Kw 9.5
Power input Kw 3.3
COP W/W 2.87
Power supply V/Hz/Ph 230V/50Hz/1PH
Rated current A 14.4
Starting current A 76
Circuit breaker rating A 20
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 890 800 680
Air flow * H/ M/ L M³/Hr 1770 1570 1300
External static pressure Min-Max Pa 37 - 80
Sound power level ** H/ M/ L dBa 68.2 65.5 61.3
Sound pressure level *** H/ M/ L dBa 54.3 51.5 48.5
Moisture removal Lt/Hr 2.7
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 1
Fan speeds H / L RPM 850
Air flow H / L M³/Hr 3110
Sound power level H / L dBa 69
Sound pressure level *** H / L dBa 62
Dimensions W/ H / D mm 900 860 340
Weight Kg 78
Package dimensions W/ H / D mm 985 900 410
Package weight Kg 82
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.33 / 7.5
Additional charge per 1 meter Grams 25
Liquid line Inch 3/8
Suction line Inch 5/8
Max. tubing length Meter 30
OUTDOOR
Connections
between
units
Max. height difference Meter 10
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 10
2-5
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 35T & OU8-33T RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 31800 34100
Capacity
Kw 9.4 10.0
Power input Kw 3.2 2.8
COP W/W 2.91 3.58
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x9.1 3x8.1
Starting current A 36
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 890 800 680
Air flow * H/ M/ L M³/Hr 1770 1570 1300
External static pressure Min-Max Pa 37 - 80
Sound power level ** H/ M/ L dBa 68.2 65.5 61.3
Sound pressure level *** H/ M/ L dBa 54.3 51.5 48.5
Moisture removal Lt/Hr 2.6
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 1
Fan speeds H / L RPM 850
Air flow H / L M³/Hr 3110
Sound power level H / L dBa 69
Sound pressure level *** H / L dBa 62
Dimensions W/ H / D mm 900 860 340
Weight Kg 78
Package dimensions W/ H / D mm 985 900 410
Package weight Kg 82
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.33 / 7.5
Additional charge per 1 meter Grams 25
Liquid line Inch 3/8
Suction line Inch 5/8
Max. tubing length Meter 30
OUTDOOR
Connections
between
units
Max. height difference Meter 10
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W), 3PH Protector
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 11
2-6
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 35T & OU8-33T ST R22
Installation method Ducted
Characteristics Units Cooling
Btu/Hr 31800
Capacity
Kw 9.4
Power input Kw 3.2
COP W/W 2.91
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x9.1
Starting current A 36
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 890 800 680
Air flow * H/ M/ L M³/Hr 1770 1570 1300
External static pressure Min-Max Pa 37 - 80
Sound power level ** H/ M/ L dBa 68.2 65.5 61.3
Sound pressure level *** H/ M/ L dBa 54.3 51.5 48.5
Moisture removal Lt/Hr 2.6
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 1
Fan speeds H / L RPM 850
Air flow H / L M³/Hr 3110
Sound power level H / L dBa 69
Sound pressure level *** H / L dBa 62
Dimensions W/ H / D mm 900 860 340
Weight Kg 78
Package dimensions W/ H / D mm 985 900 410
Package weight Kg 82
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.33 / 7.5
Additional charge per 1 meter Grams 25
Liquid line Inch 3/8
Suction line Inch 5/8
Max. tubing length Meter 30
OUTDOOR
Connections
between
units
Max. height difference Meter 10
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W), 3PH Protector
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 12
2-7
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 40 & OU10-38 RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 37700 40200
Capacity
Kw 11.0 11.6
Power input Kw 3.9 3.5
COP W/W 2.82 3.32
Power supply V/Hz/Ph 230V/50Hz/1PH
Rated current A 17.9 15.9
Starting current A 114.0
Circuit breaker rating A 25
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1130 1020 830
Air flow * H/ M/ L M³/Hr 1740 1530 1250
External static pressure Min-Max Pa 37- 80
Sound power level ** H/ M/ L dBa 70.8 67.1 62.8
Sound pressure level *** H/ M/ L dBa 54.1 50.6 49.2
Moisture removal Lt/Hr 3.6
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1125
Air flow H / L M³/Hr 4150
Sound power level H / L dBa 65
Sound pressure level *** H / L dBa 58
Dimensions W/ H / D mm 900 970 350
Weight Kg 88.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 93
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.65 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 13
2-8
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 40 & OU10-38 ST R22
Installation method Ducted
Characteristics Units Cooling
Btu/Hr 37700
Capacity
Kw 11.0
Power input Kw 3.9
COP W/W 2.82
Power supply V/Hz/Ph 230V/50Hz/1PH
Rated current A 17.9
Starting current A 114.0
Circuit breaker rating A 25
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1130 1020 830
Air flow * H/ M/ L M³/Hr 1740 1530 1250
External static pressure Min-Max Pa 37- 80
Sound power level ** H/ M/ L dBa 70.8 67.1 62.8
Sound pressure level *** H/ M/ L dBa 54.1 50.6 49.2
Moisture removal Lt/Hr 3.6
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1125
Air flow H / L M³/Hr 4150
Sound power level H / L dBa 65
Sound pressure level *** H / L dBa 58
Dimensions W/ H / D mm 900 970 350
Weight Kg 88.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 93
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.65 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 14
2-9
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 40T & OU10-38T RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 35800 38900
Capacity
Kw 10.5 11.3
Power input Kw 3.6 3.4
COP W/W 2.95 3.35
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x9.8 3x9.3
Starting current A 48
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1130 1020 830
Air flow * H/ M/ L M³/Hr 1740 1530 1250
External static pressure Min-Max Pa 37- 80
Sound power level ** H/ M/ L dBa 70.8 67.1 62.8
Sound pressure level *** H/ M/ L dBa 54.1 50.6 49.2
Moisture removal Lt/Hr 3.5
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1125
Air flow H / L M³/Hr 4150
Sound power level H / L dBa 65
Sound pressure level *** H / L dBa 58
Dimensions W/ H / D mm 900 970 350
Weight Kg 88.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 93
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.6 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 15
2-10
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 40T & OU10-38T ST R22
Installation method Ducted
Characteristics Units Cooling
Btu/Hr 35800
Capacity
Kw 10.5
Power input Kw 3.6
COP W/W 2.95
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x9.8
Starting current A 48
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1130 1020 830
Air flow * H/ M/ L M³/Hr 1740 1530 1250
External static pressure Min-Max Pa 37- 80
Sound power level ** H/ M/ L dBa 70.8 67.1 62.8
Sound pressure level *** H/ M/ L dBa 54.1 50.6 49.2
Moisture removal Lt/Hr 3.5
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 785 400 595
Weight Kg 36
Package dimensions W/ H / D mm 825 425 610
Package weight Kg 38
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1125
Air flow H / L M³/Hr 4150
Sound power level H / L dBa 65
Sound pressure level *** H / L dBa 58
Dimensions W/ H / D mm 900 970 350
Weight Kg 88.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 93
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.6 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 16
2-11
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 45T & OU10-44T RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 43400 45000
Capacity
Kw 12.7 13.0
Power input Kw 4.8 4.0
COP W/W 2.64 3.24
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x13.1 3x11.1
Starting current A 61.8
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1000 900 800
Air flow * H/ M/ L M³/Hr 2180 1960 1740
External static pressure Min-Max Pa 50 - 100
Sound power level ** H/ M/ L dBa 73.2 70.1 66.1
Sound pressure level *** H/ M/ L dBa 56.3 54.0 51.7
Moisture removal Lt/Hr 3.8
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 1040 400 595
Weight Kg 42
Package dimensions W/ H / D mm 1100 435 620
Package weight Kg 45
Units per pallet Units 8
INDOOR
Stacking height Units 2
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1125
Air flow H / L M³/Hr 4150
Sound power level H / L dBa 65
Sound pressure level *** H / L dBa 58
Dimensions W/ H / D mm 900 970 350
Weight Kg 88.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 93
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.75 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 17
2-12
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 45T & OU10-44T ST R22
Installation method Ducted
Characteristics Units Cooling
Btu/Hr 43400
Capacity
Kw 12.7
Power input Kw 4.8
COP W/W 2.64
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x13.1
Starting current A 61.8
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1000 900 800
Air flow * H/ M/ L M³/Hr 2180 1960 1740
External static pressure Min-Max Pa 50 - 100
Sound power level ** H/ M/ L dBa 73.2 70.1 66.1
Sound pressure level *** H/ M/ L dBa 56.3 54.0 51.7
Moisture removal Lt/Hr 3.8
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 1040 400 595
Weight Kg 42
Package dimensions W/ H / D mm 1100 435 620
Package weight Kg 45
Units per pallet Units 8
INDOOR
Stacking height Units 2
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1125
Air flow H / L M³/Hr 4150
Sound power level H / L dBa 65
Sound pressure level *** H / L dBa 58
Dimensions W/ H / D mm 900 970 350
Weight Kg 88.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 93
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 2.75 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 18
2-13
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 50T & OU10-50T RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 47500 51000
Capacity
Kw 13.9 14.9
Power input Kw 5.1 4.5
COP W/W 2.74 3.30
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x14.7 3x13.2
Starting current A 65.5
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1030 930 820
Air flow * H/ M/ L M³/Hr 2400 2160 1910
External static pressure Min-Max Pa 50 - 100
Sound power level ** H/ M/ L dBa 73.2 70.1 66.1
Sound pressure level *** H/ M/ L dBa 56.3 54.0 51.7
Moisture removal Lt/Hr 4.8
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 1040 400 595
Weight Kg 43
Package dimensions W/ H / D mm 1100 435 620
Package weight Kg 46
Units per pallet Units 8
INDOOR
Stacking height Units 2
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1220 955
Air flow H / L M³/Hr 4345 3400
Sound power level H / L dBa 69 63
Sound pressure level *** H / L dBa 62 56
Dimensions W/ H / D mm 900 970 350
Weight Kg 90.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 95
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 4.2 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 19
2-14
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 50T & OU10-50T ST R22
Installation method Ducted
Characteristics Units Cooling
Btu/Hr 47500
Capacity
Kw 13.9
Power input Kw 5.1
COP W/W 2.74
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x14.7
Starting current A 65.5
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1030 930 820
Air flow * H/ M/ L M³/Hr 2400 2160 1910
External static pressure Min-Max Pa 50 - 100
Sound power level ** H/ M/ L dBa 73.2 70.1 66.1
Sound pressure level *** H/ M/ L dBa 56.3 54.0 51.7
Moisture removal Lt/Hr 4.8
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 1040 400 595
Weight Kg 43
Package dimensions W/ H / D mm 1100 435 620
Package weight Kg 46
Units per pallet Units 8
INDOOR
Stacking height Units 2
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1220 955
Air flow H / L M³/Hr 4345 3400
Sound power level H / L dBa 69 63
Sound pressure level *** H / L dBa 62 56
Dimensions W/ H / D mm 900 970 350
Weight Kg 90.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 95
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R22
Charge / Distance Kg/ M 4.2 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 20
2-15
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 50T & OU10-50T RC R407C
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 45700 51500
Capacity
Kw 13.4 15.1
Power input Kw 5.4 5.6
COP W/W 2.5 2.7
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x15.0 3x15.3
Starting current A 57
Circuit breaker rating A 3x16
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1030 930 820
Air flow * H/ M/ L M³/Hr 2400 2160 1910
External static pressure Min-Max Pa 50 - 100
Sound power level ** H/ M/ L dBa 73.2 70.1 66.1
Sound pressure level *** H/ M/ L dBa 56.3 54.0 51.7
Moisture removal Lt/Hr 4.9
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 1040 400 595
Weight Kg 43
Package dimensions W/ H / D mm 1100 435 620
Package weight Kg 46
Units per pallet Units 8
INDOOR
Stacking height Units 2
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 1220 955
Air flow H / L M³/Hr 4345 3400
Sound power level H / L dBa 69 63
Sound pressure level *** H / L dBa 62 56
Dimensions W/ H / D mm 900 970 350
Weight Kg 90.5
Package dimensions W/ H / D mm 985 1020 435
Package weight Kg 95
Units per pallet Units 6
Stacking height Units 2
Refrigerant type R407C
Charge / Distance Kg/ M 4.15 / 7.5
Additional charge per 1 meter Grams 30
Liquid line Inch 3/8
Suction line Inch 3/4
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W), 3PH Protector
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 21
2-16
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 60T & OU12-60T RC R22
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 55000 56900
Capacity
Kw 16.1 16.5
Power input Kw 5.9 5.2
COP W/W 2.74 3.16
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x16.3 3x14.8
Starting current A 74
Circuit breaker rating A 3x20
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1000 840 700
Air flow * H/ M/ L M³/Hr 2950 2480 2065
External static pressure Min-Max Pa 50 - 110
Sound power level ** H/ M/ L dBa 71.8 68.9 62.3
Sound pressure level *** H/ M/ L dBa 60.2 55.7 51.5
Moisture removal Lt/Hr 4.8
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 1140 400 680
Weight Kg 46
Package dimensions W/ H / D mm 1195 440 730
Package weight Kg 50
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 825 560
Air flow H / L M³/Hr 4850 3300
Sound power level H / L dBa 70 62.0
Sound pressure level *** H / L dBa 60.4 53.7
Dimensions W/ H / D mm 900 1255 350
Weight Kg 110
Package dimensions W/ H / D mm 985 1395 435
Package weight Kg 120
Units per pallet Units 1
Stacking height Units 1
Refrigerant type R22
Charge / Distance Kg/ M 5000 / 7.5
Additional charge per 1 meter Grams 40
Liquid line Inch 1/2
Suction line Inch 7/8
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 22
2-17
PRODUCT DATA SHEET
Revision Y05-01Service Manual - EMD Series
Model (Indoor & Outdoor)
EMD 60T & OU12-60T RC R407C
Installation method Ducted
Characteristics Units Cooling Heating
Btu/Hr 51860 61400
Capacity
Kw 15.2 18.0
Power input Kw 6.0 6.3
COP W/W 2.52 2.86
Power supply V/Hz/Ph 400V/50Hz/3N
Rated current A 3x16.4 3x16.8
Starting current A 74
Circuit breaker rating A 3x20
Fan type & quantity Centrifugal & 1
Fan speeds H/ M/ L RPM 1000 840 700
Air flow * H/ M/ L M³/Hr 2950 2480 2065
External static pressure Min-Max Pa 50 - 110
Sound power level ** H/ M/ L dBa 71.8 68.9 62.3
Sound pressure level *** H/ M/ L dBa 60.2 55.7 51.5
Moisture removal Lt/Hr 4.7
Condensate drain tube I.D mm 19
Dimensions W/ H / D mm 1140 400 680
Weight Kg 46
Package dimensions W/ H / D mm 1195 440 730
Package weight Kg 50
Units per pallet Units 8
INDOOR
Stacking height Units 4
Refrigerant control Capillary tube
Compressor type Scroll
Fan type & quantity Axial & 2
Fan speeds H / L RPM 825 560
Air flow H / L M³/Hr 4850 3300
Sound power level H / L dBa 70 62.0
Sound pressure level *** H / L dBa 60.4 53.7
Dimensions W/ H / D mm 900 1255 350
Weight Kg 110
Package dimensions W/ H / D mm 985 1395 435
Package weight Kg 120
Units per pallet Units 1
Stacking height Units 1
Refrigerant type R407C
Charge / Distance Kg/ M 4550 / 7.5
Additional charge per 1 meter Grams 40
Liquid line Inch 1/2
Suction line Inch 7/8
Max. tubing length Meter 50
OUTDOOR
Connections
between
units
Max. height difference Meter 25
Operation control type LCD Remote control
Heating elements Kw No
Others Crankcase heater (60W)
* Airflow in ducted units; according to nominal external static pressure.
** Sound power in ducted units is measured at air outlet side.
*** Sound pressure level is measured at 1-meter distance from the unit.
Page 23
3-1
RATING CONDITIONS
Revision Y05-01Service Manual - EMD Series
3. RATING CONDITIONS
NOTES:
1. Rating conditions ISO/CD 13253R
Cooling: indoor: 27qC (80qF) DB 19qC (66qF) WB
Outdoor: 35qC (95qF) DB
Heating: indoor: 20qC (68qF) DB
Outdoor: 7qC (45qF) DB 6qC (43qF) WB
Refrigerant tubing length (one way) 7.5m (24.6 ft)
2. Guaranteed operating range:
Indoor Outdoor
Upper limit
32qC DB, 23qC WB 46qC DB
Cooling
Lower limit
21qC DB, 15qC WB 21qC DB
Upper limit
27qC DB 24qC DB, 18qC WB
-5qC DB, -6qC WB (For R22)
Heating
Lower limit
20qC DB
-9qC DB, -10qC WB (For R407C)
1 PH 198 – 242 V
Voltage
3 PH 360 – 440 V
Page 24
4-1
OUTLINE DIMENSIONS
Revision Y05-01Service Manual - EMD Series
4. OUTLINE DIMENSIONS
4.1 Indoor Unit: EMD 27, 35, 40
4.2
Indoor Unit: EMD 45, 50
4.3
Indoor Unit: EMD 60
600
600
Page 25
4-2
OUTLINE DIMENSIONS
Revision Y05-01 Service Manual - EMD Series
4.4 Outdoor Unit: OU6-27
4.5
Outdoor Unit: OU8-33
Page 26
4-3
OUTLINE DIMENSIONS
Revision Y05-01Service Manual - EMD Series
4.6 Outdoor Unit: OU10-38/45/50
4.7
Outdoor Unit: OU12-60
Page 27
5-1
WIRING DIAGRAMS
Revision Y05-01Service Manual - EMD Series
5. WIRING DIAGRAMS
5.1 EMD 27 1PH
INDOOR POWER SUPPLY
INDOOR
OUTDOOR
Page 28
5-2
WIRING DIAGRAMS
Revision Y05-01 Service Manual - EMD Series
5.2 EMD 35 1PH
OUTDOOR POWER SUPPLY
INDOOR
OUTDOOR
Page 29
5-3
WIRING DIAGRAMS
Revision Y05-01Service Manual - EMD Series
5,3 EMD 35 3PH
OUTDOOR POWER SUPPLY
INDOOR
OUTDOOR
Page 30
5-4
WIRING DIAGRAMS
Revision Y05-01 Service Manual - EMD Series
5.4 EMD 40 1PH
OUTDOOR POWER SUPPLY
I
INDOOR
OUTDOOR
Page 31
5-5
WIRING DIAGRAMS
Revision Y05-01Service Manual - EMD Series
5.5 EMD 40, 45 3PH
OUTDOOR POWER SUPPLY
INDOOR
OUTDOOR
Page 32
5-6
WIRING DIAGRAMS
Revision Y05-01 Service Manual - EMD Series
5,6 EMD 50 3PH
OUTDOOR POWER SUPPLY
INDOOR
OUTDOOR
Page 33
5-7
WIRING DIAGRAMS
Revision Y05-01Service Manual - EMD Series
5,7 EMD 60 3PH
OUTDOOR POWER SUPPLY
INDOOR
OUTDOOR
Page 34
6-1
REFRIGERATION DIAGRAMS
Revision Y05-01Service Manual - EMD Series
6. REFRIGERATION DIAGRAMS
6.1 Model: EMD 27 RC
Heat Pump
Page 35
6-2
REFRIGERATION DIAGRAMS
Revision Y05-01 Service Manual - EMD Series
6.2 Model: EMD 35 RC
Heat Pump
Page 36
6-3
REFRIGERATION DIAGRAMS
Revision Y05-01Service Manual - EMD Series
6.3 Models: EMD 27, 35 ST
Cooling Only
Page 37
6-4
REFRIGERATION DIAGRAMS
Revision Y05-01 Service Manual - EMD Series
6.4 Models: EMD 40, 45, 50, 60 RC
Heat Pump
Page 38
6-5
REFRIGERATION DIAGRAMS
Revision Y05-01Service Manual - EMD Series
6.5 Model: EMD 40, 45, 50 ST
Cooling Only
Page 39
6-6
REFRIGERATION DIAGRAMS
Revision Y05-01 Service Manual - EMD Series
6.6 Additional Refrigerant Charge (R 22, R407C gr.)
10m 15m 25m 30m 50m
EMD 27 60 185 435 - EMD 35 60 185 435 560 EMD 40 75 225 525 675 1275
EMD 45 75 225 525 675 1275
EMD 50
75 225 525 675 1275
EMD 60
100 300 700 900 1700
REFRIGERANT TUBING LENGTH (ONE WAY)
MODEL
MAXIMUM REFRIGARANT TUBING LENGTH
AND HEIGHT DIFFERENCE
LENGTH (m) HEIGTH
(A) DIFFERENCE (m)
EMD 27 25 10
EMD 35 30 10
EMD 40 50 25
EMD 45 50 25
EMD 50 50 25
EMD 60 50 25
MODEL
*
THE INDOOR UNIT CAN BE ABOVE OR BELOW THE OUTDOOR UNIT.
Page 40
7-1
CONTROL SYSTEM
Revision Y05-01Service Manual - EMD Series
7. CONTROL SYSTEM
Instructions for
Electronic Control Service Package
INTRODUCTON
The electronic control package is designated for service and is common for the following group
of air-conditioners.
1. ST/RC group - Cooling only / Cooling and Heating by heat pump.
Cooling and Heating by heat pump and supplementary heater.2. SH group -
3. RH group - Cooling and Heating by heaters only.
Before installation , be sure that you select and set for the right group .
PACKAGE CONTENT
The following should be included in the electronic control service package:
- Controller designated for service
- Model plug
MODEL PLUG SETTINGS
Before installation, make sure to set the model plug to conform with the suitable group.
GROUP J6 Setting J2 Setting
ST / RC open open
SH closed open
RH closed closed
Page 41
7-2
CONTROL SYSTEM
Revision Y05-01
Service Manual - EMD Series
8
CONTROLS, MAIN P.C.B
DUCTED SPLIT A.C
POWE
POWE
R CONTROLLE
OLLE
R
Page 42
7-3
CONTROL SYSTEM
Revision Y05-01Service Manual - EMD Series
PG. 12- 14SERIES: EMDREV. 01 03/2004
FIG.4 ELECTRICAL ASSEMBLY – EMD
FOR COMPONENTS DESCRIPTION AND CATALOG NUMBERS REFER
TO SPARE PARTS LIST FOR THE RELEVANT PRODUCT NO.
Page 43
7-4
CONTROL SYSTEM
Revision Y05-01
Service Manual - EMD Series
GANG BOARD
DISPLAY BOARD
Page 44
7-5
CONTROL SYSTEM
Revision Y05-01Service Manual - EMD Series
CONFIGURATION OF THE APPLIANCE
REMOTE CONTROL DIP SWITCH SETTING
DEFINITIONSETTING SWITCH STATUS
RC4RC3SW. NO.4SW. NO. 3SW. NO. 2SW. NO. 1
RC-ALL MODES OF OPERATION__
OFF
OFF
STD-COOL, FAN, DRY, ACTIVE__
OFF
ON
HEAT-COOL, FAN, DRY, ACTIVE__
ON
OFF
AUTO FAN (AF)__
ON
ON
VERTICAL SWING ONLY
TEMP. DISPLAY IN qC DEGREES
_OFF
_
_
HORIZONTAL & VERTICAL SWING
FUNCTIONS TOGETHER
TEMP. DISPLAY IN qF DEGREES
_ON
_
_
DISABLE LCD &
KEY ILLUMINATION
TIMER & CLOCK 12 H AM, PM
OFF_
_
_
ENABLE LCD &
KEY ILLUMINATION
TIMER & CLOCK 24 H
ON
_
_
_
RESET OPERATION - Press at the same time the 4 buttons :“CLEAR “, “SET” ,
"HR +”, “HR -” for 5 seconds
LEGEND:
SW1, SW2 - SELECTION OF RC/ST
SW3 - SELECTION OF TEMP. DISPLAY qC or qF IN RC3 OR SWING FUNCTION IN RC4.
SW4 - SELECTION OF TIME DISPLAY 12H AM/PM or 24H IN RC3 0R ILLUMINATION FUNCTION IN RC4.
OFF = 0
ON =1
NOTE: After setting the dip switches perform reset operation..
Page 45
7-6
CONTROL SYSTEM
Revision Y05-01
Service Manual - EMD Series
1 Legend
1.1 Abbreviations
AC - Alternate Current
A/C - Air-Conditioner
ANY - ON or OFF status
CLOCK - ON/OFF Operation Input, (dry contact)
COMP - Compressor
CPU - Central Processing Unit
CTV -Compensation Temperature Value
HE - Heating Element
HPC - High Pressure Control
H/W - Hardware
ICP - Indoor Condensation Pump
ICT - Indoor Coil Temperature (RT2) sensor
IF, IFAN - Indoor Fan
IR - Infra Red
LEVEL1 - Normal Water Level
LEVEL2/3 - Medium/High Water Level
LEVEL4 - Overflow Level
Max - Maximum
Min - Minimum
min - Minute (time)
NA - Not Applicable
OCP - Outdoor Condensation Pump
OCT - Outdoor Coil Temperature (RT3) sensor
OF, OFAN - Outdoor Fan
OPER - Operate
Para. - Paragraph
RAT - Return Air Temperature (RT1) sensor
RC - Reverse Cycle (Heat Pump)
R/C - Remote Control
RCT - Remote Control Temperature
RH - Resistance Heater
RT - Room Temperature (i.e. RCT in IFEEL mode, RAT otherwise)
RV - Reversing Valve
SB, STBY - Stand-By
sec - Second (time)
Sect - Section
SH - Supplementary Heater
SPT - Set Point Temperature
ST - Standard (a Model with Cooling Only)
S/W - Software
TEMP - Temperature
W/O - Without
'T - The difference between SPT and RT.
in Heat Mode: 'T = SPT - RT
in Cool/Dry/Fan Mode: 'T = RT - SPT
Page 46
7-7
CONTROL SYSTEM
Revision Y05-01Service Manual - EMD Series
2 General functions for all models
2.1 COMP operation
2.1.1 For each Mode including POWER OFF & SB, a Min time delay of 3 min before COMP restarting, excluding
DEICING Mode (see 7.2.1).
2.1.2 The Min operation time of COMP under different operating conditions is
Operation Mode
Min operation time of
COMP
Heat, Cool, H.P protection or Auto Modes 3 min.
Fan, Dry, Overflow, Protection modes, or mode change ignored
2.2 IFAN operation
2.2.1 Min time interval between IFAN speed change in AUTOFAN Mode, is 30 sec.
2.2.2 Min time interval between IFAN speed change in H/M/L Mode is 1 sec.
2.2.3 IFAN speed in Heat/Cool Autofan Mode is determined according to the following chart:
T [oc]
L
M
H
IFAN speed
3142
where in Heat Mode: 'T = SPT - RT
in Cool Mode: 'T = RT- SPT
2.3 OFAN operation
2.3.1 Min time interval between OFAN ON/OFF state change is 30 sec.
2.4 HE operation
2.4.1 Minimum Heaters ON or OFF time is 30 sec.
2.4.2 Heaters can never be in operation while IFAN is OFF.
2.4.3 In RH group, HE-1 and HE-2 will be activated only when COMP is not
operating, except in Dry Mode.
2.5 Protections
2.5.1 High pressure protection is applicable to all operating modes.
2.5.2 Deicing control is valid in Heat and Auto Heat Mode only.
2.5.3 Defrosting control is valid in Dry, Cool, and Auto Cool Modes.
Page 47
7-8
CONTROL SYSTEM
Revision Y05-01
Service Manual - EMD Series
2.6 Thermistors operation
2.6.1 Return air Temp. is detected by RAT in normal Mode, or by RCT (R/C sensor) in I-FEEL Mode.
2.6.2 Indoor Coil Temp. is detected by ICT.
2.6.3 Outdoor Coil Temp. is detected by OCT.
2.6.4 Definition of thermistor faults:
a. Thermistor is disconnected -
The thermistor reading is below -30
o
c.
b. Thermistor is shorted -
The thermistor reading is over 75
o
c.
c. Thermistor Temp reading doesn’t change -
(i) This test is performed only once after a unit is switched from OFF/STBY to operation. At the first occurrence of
10 min continuous COMP operation, the current ICT are compared with those when the COMP was switched
from OFF to ON 10 min before. If the 'T is less than 3
o
c, the thermistor is regarded as defective.
(ii) The ICT no-change error can be disabled together by connecting a 4.7 k ohm resistor (5%) to the ICT connector.
These resistors are equivalent to a thermistor 48+/-1
o
c.
2.6.5 Cases for disabling ICT thermistor disconnected detection
i. The detection of thermistor faults (a) and (b) above is disabled when Deicer Protection is started. The
detection will be enabled again only after (1) the deicing is completed, and (2) COMP has been restarted and
operated for 30 sec.
ii. When all the following conditions are fulfilled:
a. 4.7K Ohm resistor is connected on the OCT
b. IFAN is OFF
c. Compressor is ON
d. ICT < -30 (disconnected)
2.7 RV Fault
This test is applied only in compressor units where 4.7k Ohm is not connected to the OCT.
This test is performed every time
the unit is switched from OFF/STBY to OPER in Heat mode or changes operation mode from
COOL/DRY to HEAT or (this applies also in AUTO COOL/HEAT mode).
If ICT is lower than 35
0
C at the time of mode change, then at the first occurrence of 15 min continuous COMP operation, ICT is
compared with ICT reading when the COMP was switched from OFF to ON 15 min before. RV fault is defined when ICT decreases
in more than 5
0
C.
In this case, the COMP will stop and the SB led will blink. This fault is reset after going to SB or mode change.
2.8 General features
2.8.1 Allowed (control target) rage for RAT is SPT +/-1oC.
2.8.2 Whenever the unit is changed from Cool/Dry/STBY mode to Heat mode or vice versa, the procedures below are
followed:
Stop COMP for 3 min o Change RV state o Start COMP if necessary.
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3 Cooling Mode
3.1 Cooling Mode – General
3.1.1 Mode Definition
MODE: COOL, AUTO (AT COOLING)
TEMP: SELECTED DESIRED TEMPERATURE.
FAN: HIGH, MED, LOW, AUTO.
TIMER: ANY
I FEEL: ON OR OFF
3.1.2 Room Temperature, RT, is detected by
x RAT in normal operation, or
x RCT (R/C sensor) in I-FEEL mode.
3.1.3 Indoor Coil Temp is detected by ICT.
3.1.4 Outdoor Coil Temp is detected by OCT.
3.2 Control Functions
3.2.1 COMP Operation
ON
OFF
RT-SPT
0
1
COMP
3.2.2 OFAN Operation
x In normal operation OFAN operates together with the COMP.
3.2.3 IFAN Operation
x IFAN will operate in ANY speed regardless the ICT or COMP state.
x IFAN speed will be determined according to user selection or AUTO-FAN logic (sect. 2.2)
3.2.4 RV and HEATERS outputs
x RV and HEATERS are in OFF state in cool mode.
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3.3 Sequence Diagrams
3.3.1 Maintaining room temp at desired level by comparing RT and SPT with user defined IFAN speed.
(RT - SPT) [oc]
+3
+2
+1
0
-1
-2
ON
OFF
ON
OFF
USER FAN SPEED
ON
OFF
COMP
(WVL)
OFAN
IFAN
RV
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3.3.2 Maintaining room temp at desired level by comparing RT and SPT with AUTO-IFAN.
(RT - SPT) [oc]
+4
+3
+2
+1
0
-1
-2
ON
OFF
ON
OFF
H
L
M
ON
OFF
COMP
(WVL)
OFAN
IFAN
RV
Note: Refer to Sect 2.22.2 for IFAN operations in Auto-fan mode.
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4 Heating Mode
4.1. Heating Mode - General
4.1.1. Compensation Procedure
When I feel is OFF during heat mode: RT= RAT – CTV.
When I feel is ON during heat mode: RT= RCT.
Model CTV
WNG, WMN, RWK. +3
o
C
MBX, PX, PRX, P2000, PXD +0
o
C
WMF, WAX +2
o
C
EMD/ELD +4
o
C
ECC-K +4
o
C
No compensation will be activated in Forced operation modes (Cf. Sect 11).
4.1.2. IFAN operation rules for RC and SH groups
(a) As a general rule for RC and SH groups, IFAN will be switched ON according to the
following graph:
Note 1: When COMP is ON (except WAX Model), IFAN will change from Low to OFF either when:
(1) ICT<28 and IFAN is on for 5 min or longer.
Or,
(2) ICT<20
Note 2: When ICT is faulty:
When the compressor switches from off to on (excluding deicing), IFAN will be on in ANY speed.
When the compressor switches from on to off, the IFAN will change to low speed for 30 seconds and then it
will be off.
(b) In SH or RC group, IFAN will operate for min 30 sec according to 0-(a) after HE’s
turned off, where in a case it has to be OFF, it will be forced to low speed.
4.1.1 IFAN operation rules for RH group
(a) In RH group, IFAN starts when HE starts. When HE switches to OFF, IFAN
switches to LOW for 30 sec and then stops.
301732
20
ANY
LOW
OFF
IFAN
ICT
40
25
Duct ed
Genera l:
Window:
Note 1
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4.1.2 Heaters operation rules for RC and SH groups
(a) For both RC and SH groups, Heaters versus T is as the following:
OFF
ON
ON
OFF
HE1
HE2
1 2 3 4
T=SP-RT [oc]
(b) Operation rules for Heaters in RC group:
(i) Heaters can be enabled only if IFAN is ON.
(ii) Heaters will operate according to T and the following graph:
32
20
20
15
50
ON
OFF
ICT
45
HE-1
&
HE- 2
General:
Window:
(c) Rules for Heaters operation in SH group:
(i) When heaters are to be ON and IFAN is to be OFF according to 4.1.2 (a), IFAN will be
forced to low speed.
(ii) Heaters will operate according to T and the following graph:
(d) F
o
r
b
o
t
h
RC and SH groups, excluding deicing, HE1 and HE2 can be on only when the compressor is on.
50
ON
OFF
ICT
45
HE - 2
37 42
HE -1
ON
OFF
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4.1.5 Heaters operation rules for RH groups
(a) In RH group, HE operation is according to the difference between RAT and SPT.
-1 0 2
T=SP-RT [oc]
HE1
HE2
ON
ON
OFF
OFF
4.1.6 OFAN Operation for RC and SH groups
(i) As a general rule for RC and SH groups, excluding protection modes, OFAN starts with the
compressor.
(ii) When OFAN is then ON it will operate according to the following conditions:
a) OFAN operates together with the compressor.
b) When
50)2( tt ICTandSPTRT
and the 4.7k Ohm resistor is not connected to the
OCT, OFAN will operate according to the following curve:
0 3
ON
OFF
OCT
OFAN
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4.2. Heating, RC or SH Group
Mode: Heat, Auto (at heating)
Temp: Selected desired temperature
Fan: HIGH, MED, LOW
Timer: Any
I Feel: On or Off
Sequence Diagram
Maintains room temp. at desired level by comparing RAT or RCT to SPT.
(RT - SPT) [oc]
+2
+1
0
-1
-2
-3
-4
ON
OFF
ON
OFF
ON
OFF
COMP
(WVL)
HE1
HE2
ON
OFF
RV
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4.3. Heating, RC or SH Group with Autofan
Mode: Heat, Auto (at heating)
Temp: Selected desired temperature
Fan: Auto
Timer: Any
I Feel: On or Off
Sequence Diagram
Maintains room temp at desired level by controlling COMP, IFAN and OFAN.
(RT - SPT) [oc]
+2
+1
0
-1
-2
-3
-4
ON
OFF
ON
OFF
ON
OFF
COMP
(WVL)
HE1
HE2
ON
OFF
RV
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4.4. Heating, RH Group
Mode: Heat, Auto (at Heating)
Temp: Selected desired temperature
Fan: HIGH, MED, LOW
Timer: Any
I Feel: On or Off
Sequence Diagram
Maintains room temp at desired level by controlling Heating Elements : HE1 or HE2.
(RT - SPT) in oc
+2
+1
0
-1
-2
-3
ON
OFF
ON
OFF
H/M/L
OFF
L
30 sec
HE1
HE2
IFAN
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4.5. Heating, RH Group, with Autofan
Mode: Heat, Auto (at Heating)
Temp: Selected desired temperature
Fan: Auto
Timer: Any
I Feel: On or Off
Sequence Diagram
Maintains room temp at desired level by controlling the 2-Stage Electric Heaters.
(RT - SPT) in oc
+2
+1
0
-1
-2
-3
ON
OFF
ON
OFF
HE1
HE2
H
OFF
L
30 sec
M
IFAN
-2
-4
-1
-3
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5 Automatic Cooling or Heating
5.1 Automatic Cooling or Heating - General
The Auto Mode is for model with compressor and the WVL-RH only. The WVL-ST, RC and SH units do not work in Auto Mode.
5.1.1 Mode Definition
Mode: Auto
Temp: Selected desired temperature
Fan: Any
Timer: Any
I Feel: On or Off
5.1.2 Switching-temperature between Cooling and Heating is SPT r 3
o
c.
5.1.3 When the Auto Mode is started with SPT +/-0
o
c, the unit will not select Auto Heat or Auto Cool mode
immediately. Instead, the unit will be in a temporary Fan Mode with IFAN operating at low speed. The proper
Auto Heat mode or Auto Cool will be started whenever the RT reaches SPT-1
o
c or SPT+1oc respectively.
5.1.4 For RC & SH units, Mode change between Auto Heat & Auto Cool Modes is possible only after the COMP has
been OFF during the last T minutes.
Mode Change time, T
Auto Cool to Auto Heat 3 min
Auto Heat to Auto Cool 4 min
5.1.5 For RH and WVL-RH units, Mode change between Auto Heat & Auto Cool Modes is possible after the
COMP/HEs have been OFF during the last T minutes.
Mode Change time, T
Auto Cool to Auto Heat COMP off for 3 min
Auto Heat to Auto Cool HEs off for 3 min
5.1.6 When unit is changed form Cool/Dry mode to Auto Mode, the unit will continue to operate at (Auto) Cool Mode
until the conditions for switching from Auto Cool to Auto Heat are satisfied.
Similarly, when unit is changed from Heat Mode to Auto Mode, the unit will continue to operate at (Auto) Heat Mode until the
conditions for switching from Auto Heat to Auto Cool are satisfied.
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5.2 Sequence Diagrams
5.2.1 Auto Cooling or Heating, RC or SH Groups
Maintains room temp at desired level by selecting between cooling and heating modes.
(RT - SPT) [oc]
+3
+2
+1
0
-1
-2
-3
-4
ON
OFF
ON
OFF
H/M/L/OFF
ON
OFF
ON
OFF
COMP
& OFAN
HE1
HE2
IFAN
RV
USER FAN SPEED H/M/L/OFF
Auto Cool Mode Auto Heat Mode
> 4 min > 3 min
> 3 min > 2 min
(3) (3)
(4)
(4)
Auto Heat Mode
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5.2.2 Auto Cooling or Heating RH Group
Maintains room temp at desired level by selecting between Cooling or Heating Modes.
(RT - SPT) [oc]
+3
+2
+1
0
-1
-2
-3
ON
OFF
ON
OFF
L
OFF
ON
OFF
H/M/L
30 sec
COMP
& OFAN
HE1
HE2
IFAN
RV
OFF
> 3 min
(2)
Auto Heat Mode Auto Cool Mode Auto Heat Mode
(1)
> 3 min
(2)
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6 Dry Mode
6.1 Dry, ST or RC group or P2000 model with any group settings
Mode: Dry
Temp: Selected desired temp
Fan: Low (automatically selected by software)
Timer: Any
I FEEL: Any
Control function
Reduce room humidity with minimum temp. fluctuations by operating in Cool Mode with low speed IFAN.
DRY
(RT - SPT) [oc]
+2
+1
0
-1
-2
ON
OFF
ON
OFF
LOW
OFF
DRY-ON
DRY-OFF
ON
OFF
Time [min]
10
20
30
40 50
Max 15 minutes
3.5
min
Note1
6 min
Note 2
COMP
& OFAN
HE1
& HE2
IFAN
RV
Max 15 minutes
5 minutes COMP
ON time
Notes :
1. When Dry is ON, the COMP is forced OFF for 3.5 min (longer than the 3 min Min COMP-Off time) after every 15 min
of continuous COMP operation.
2. When Dry is OFF, the COMP is forced ON for 6 min (longer than the 3 min Min COMP-On time) after every 15 min
of continuous COMP OFF time.
3. When Dry is changed from ON to OFF or vice versa, the limits mentioned in (1) & (2) are ignored. The COMP
operation is only controlled by the 3 min Min OFF time and 1 min Min ON time.
4. In Dry Mode, IFAN is LOW when COMP is ON, and is OFF when COMP is OFF.
5. Pumps are operating as indicated in Sect. 7.3, 7.4, and 7.5.
6. HEs are always OFF in Dry Mode.
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6.2. Dry, SH or RH group excluding P2000 model
Mode: Dry
Temp: Selected desired temp.
Fan: Low (automatically selected by software)
Timer: Any
I FEEL: Any
Control function
Reduce room humidity with minimum Temp. fluctuations by operating in Cool Mode with low speed IFAN and HE.
(RT - SPT) [oc]
+2
+1
0
-1
-2
ON
OFF
ON
OFF
LOW
OFF
ON
OFF
10
20
30
40 50
COMP
& OFAN
HE1
IFAN
HE2
ON
OFF
RV
Time [min]
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7 Protection
7.1. Cooling Mode Protections
7.1.1. Indoor Coil Defrost
Mode: Cooling, Dry, Auto
Temp: Selected desired temp.
Fan: Any
Timer: Any
I Feel: On or Off
Control Function
Protect the indoor coil from ice formation at low ambient temperature.
ICT [oc]
+2
ON
OFF
ON
OFF
t1 t2 t3
COMP
OFAN
+1
+5
+14
0
-1
ON
OFF
IFAN
t1
t1 = 5 min minimum for each COMP starting
t2 = OFAN cycling (alternate between ON and OFF every 30 sec) for 20 min maximum
t3 = COMP and OFAN stop for 10 min minimum
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7.1.2. High Pressure Protection
Mode: (Auto) Cooling or Dry
Temp: Selected desired temp.
Fan: Any
Timer: Any
I Feel: On or Off
Control Function
To protect the COMP from the high pressure built-up in the outdoor coil during normal cooling operation, by switching OFF the
IFAN and COMP.
OCT [oc]
Any
OFF
Any
ON
Any
Blink
ON
COMP
OFAN
IFAN
OPER
LED
52
55
61
66
L
COMP is forced OFF
OFAN is forced ON
IFAN forced
to LOW
68
OFAN follow operation of
COMP
COMP is forced OFF
OFAN is forced ON
For all models except WAX & P2000 For WAX & P2000 models
Note:
1. The ICT is also monitored during Cool and Dry mode, in case the RV control circuit is faulty. Whenever ICT
reaches 70
o
c, which indicates a high pressure in the indoor coil, the COMP will be forced off automatically. The
COMP can be turned on again only after the ICT is under 70
o
c again and after the 3 min COMP ON delay time.
The OPER LED will not blink in this case.
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7.2. Heating Mode Protections
7.2.1. Outdoor coil Deicing (excluding RH Group)
Mode: Heating, Auto (at heating)
Temp: Selected desired Temp
Fan: Any
Timer: Any
I FEEL:Any
Control function
To protect the Outdoor coil from ice formation by controlling COMP & RV operation.
7.2.1.1. Deicer Activation Algorithm
1. static deicer threshold is -5°C
2. dynamic deicer threshold is change of 3°C in 3 minute in the OCT temperature
3. In first COMP activation (after SB or OFF), if OCT < 0
o
c, min time to first deicer id 10 min else 40 min.
4. In a case of reading 3 successive OCT values below –10°C and previously 3 successive OCT values of 43°C
(4.7 K) , the unit will activate deicing procedure.
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7.2.1.2. Deicing procedure
OCT [oc]
ON
OFF
ON
OFF
ON
L
ANY
COMP
OFAN
RV
IFAN
DST
(DDT)
0
12
OFF
HEs are forced ON
DOC
ANY
ON
HE
36s 36s
DT
30s
max 12 min.
Note 3
DI (note 1)
DI (note 2)
30s
3 min 3 min
IFAN
OFF
ANY
HE
OFF
ANY
all SH units
except WAX
RC or WAX units
HEs are forced OFF
IFAN is forced to Low Speed
BLINK
ON
OPER
LED
Notes :
1. In the following Deicing cycles, the time interval between two Deicing cycles activation is between 30 to
80 min
2. For RC group, IFAN is forced off
3. For SH group, HEs are forced ON and IFAN is forced to operate in Low speed, regardless of the ICT and
difference between RAT & SPT.
4. When jumper J7 is set, the DST value is -2°C.
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7.2.2. High pressure protection (excluding RH Group)
Mode: (Auto) Heating
Fan: Any
Timer: Any
I Feel: On or Off
Control Function
Protect the Compressor from high pressure by switching OFF the OFAN and COMP.
ICT [oc]
Any
Off
Any
Off
COMP
OFAN
52
55
61
66
COMP is forced OFF
67
OFAN is force
Off
COMP is forced OFF
For all models except WAX For WAX model
ON
BLINK
OPER
LED
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SELF TEST for General Controller
STEP 1: TURNING ON THE POWER .
Turn ON the power, make sure that the unit is in operation.
STEP 2 : ENABLE SELF TEST MODE
1. Use the Remote control to send the first settings to display / indoor unit
Heat mode, High IFAN, set temperature 16 ºC , no I FEEL Sleep or any Timer settings needed.
2. Cover the IR transmitter components in the head of the remote control so that it will not
transmit the signals to the indoor unit display.
3. Use the Remote control to send the second settings to display / indoor unit
Cool mode, Low IFAN, no I FEEL Sleep or any Timer settings.
4. Uncover the remote control IR transmitter and change the temperature settings.
If the display/indoor unit receive the settings properly the following steps will start:
STEP 3 : MODEL SETTING CONFIRMATION
1.The STAND-BY and COOL LEDS will indicate the operation mode as following:
COOL LEDSTAND-BY LEDOPERATION
MODE
OFFONST
OFFOFFRC
ONOFFSH
ONONRH
2. Testing the Model configuration. selected by the COMP, STAND-BY, TIMER LEDS and
FILTER will indicate the model configuration as follows:
FILTER LED TIMER LEDOPERATE LEDCOMPMODEL
OFFOFF
OFFON
WNG
ONOFF
OFFON
MBX
OFFON
OFFON
WNX
OFFOFF
ONON
PRX
ONOFF
ONON
WMN1
OFFON
ONON
EMD/LS
ONON
ONON
ECC-K
OFFONOFFOFF
WMN 4
ONONOFFOFF
PXD
ONOFFONOFF
WMN 2/WHX
ONONONOFF
WMN 3
In this term the step motor will turn to HOME POSITION.
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STEP 3 :AUTO LED WALK TEST.
1) All the LEDS will turn OFF.
2) All the LEDS will turn ON for 1 second one by one in the following sequence :
STAND-BY Ö OPERATE Ö TIMER Ö FILTER Ö COOL Ö HEAT.
3) In PRX all the LEDS will turn ON for 1 second one by one in the following
sequence : 18 °c Ö 20 °c Ö 22 °c Ö 24 °c Ö 26 °c Ö 28 °c Ö 30 °c Ö High IFAN Ö
Auto IFAN Ö Med IFAN Ö Low IFAN Ö STAND-BYÖ TIMER Ö FILTER ÖCOOLÖ HEAT.
STEP 4: AUTO REALY WALK TEST:
All relays will turn ON one by one in the following sequence :
COMPRESSOR Ö OUTDOOR FANÖR. V. Ö HEATER 1 Ö HEATER 2 Ö INDOOR WATER
PUMP Ö SWING or OUTDOOR WATER PUMP Ö INDOOR FAN: Ö LOW Ö MID Ö HIGH.
When the relay walk test is completed, the next test will start automatically.
STEP 5: FREQUENCY TESTING:
If the frequency measuring process fails the COOL LED will turn ON.
In order to move to the next step press ON/OFF button on the remote control.
STEP 6 : INPUT TEST.
This stage is testing the analog real time indicators (thermistors, LEVEL and clock) according
the table below.
LED indicator Condition for LED to be ON
STBY LED
Room thermistor z
25 °c
OPER LED
Indoor coil thermistor z
25 °c
TIMER LED
Outdoor coil thermistor z
25 °c
FILTER LED Clock
COOL LED LEVEL 2&3
HEAT LED LEVEL 4
STEP 7 : TIMING RESET TEST (WATCH DOG).
The test purpose is to find out the CPU rise time after power failure is between 1 to 3 sec,
test results are indicated on the LEDS : STAND-BY,OPER, TIMER AND FILTER are turning
ON one by one.
The results of the test are coded as follow:
pass condition
1 sec - STAND-BY and OPER are turn ON
2 sec - STAND-BY ,OPER and TIMER are turn ON
Fail condition
0 sec - STAND-BY is turn ON
3 sec - STAND-BY ,OPER , TIMER and FILTER are turn ON
When the timing reset test is completed, the next test will start automatically.
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STEP 8 : MEMORY TEST (EEPROM)
The test purpose is to check if the memory is functioning correctly.
The test result is reported by using the STAND-BY and FILTER LEDS:
LED indicator Condition for LED to be ON
STAND-BY LED Test passed
FILTER LED Test failed
AT THIS POINT THE SELF-TEST IS COMPLETED.
In order to terminate self-test mode the User can change the unit setting from "Cool Mode,
Low FAN" to " Cool Mode, Med FAN" or to wait without using the Remote control for 60 sec.
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RC/ST TEST
MODEL
CONFIGURATION
TEST
STEP MOTOR TEST
FREQUENCY
TEST
LEDS OFF
LEDS ON TEST
AUTO RELAY
TEST
SHORT JUMPER
J1
(CONTROL PCB)
PRESS ON
POWER
BUTTON
PRESS ON
MODE
BUTTON
INDOOR FAN
SPEED TEST
SELF TEST DIAGRAM
Step 1
Step 2
Step 3
FOR CONTROLLER (VERSION 4V5 OR HIGHER)
COOL
HEAT
COMPRESSOR
OUTDOOR FAN
R.V.
LOW
MEDIUM
HIGH
TIMER
OPERATE
STANDBY
BUZZER TEST
(ONE BEEP SOUND)
REMOTE CONTROL
TO CPU COMUNICATION
(TWO BEEPS SOUNDS)
THERMISTOR ANALOG
VOLTAGE CHECKING
EEPROM
MEMORY
TEST
END OF SELF
TEST
PRESS ON
RESET
BUTTON
PRESS ON
FAN
BUTTON
ON THE
REMOTE CONTROL
PRESS ON
MODE
BUTTON
PRESS ON
MODE
BUTTON
Step 4
Step 5
Step 6
Step 7
Step 8
DISCONNECT
JUMPER
J1
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System diagnostics
Pressing Mode button for 5-10 seconds in SB or any other operation mode will activate
diagnostic mode by the acknowledgment of 3 short beeps and lighting of COOL and HEAT
LEDs.
In diagnostic mode, system problems will be indicated by blinking of Heat & Cool LEDs.
The coding method will be as follow:
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 Problem 1 2 3 4 5
1 RT1 is disconnected
2 RT1 is shorted
3 RV Fault
4 RT2 is disconnected
5 RT2 is shorted
6 (Reserved)
7 RT2 temp reading doesn’t change
8 RT3 is disconnected
9 RT3 is shorted
10 (Reserved)
11 RT3 temp reading doesn’t change
12 RT2 & RT3 temp reading doesn’t change
- ON, - OFF
Notes:
1. If faults occur in more than one thermistor (except case number 12 on the
table above), only one fault will be indicated according to the following order:
RT3, RT2, RT1.
2. A/C will jump out to normal mode if sending a command by the R/C in the
system diagnostics mode. If this command from the R/C contain a Group ID,
this ID will become the new Group ID of the ELCON unit.
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