ecoclima EC/I-09QC User manual

Service manual
(INVERTER 50Hz R410A)
Split system:
EC(-W)/I-09QC(-B,-G,-W)
EC(-W)/I-12QC(-B,-G,-W)
EC(-W)/I-18QC(-B,-G,-W)
EC(-W)/I-24QC(-B,-G,-W)

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CONTENTS
1.Range & Conditions.................................................................................................... 3
2. Control Specifications................................................................................................4
3. Exploded view.......................................................................................................... 14
4. Refrigerant Flow Diagram.......................................................................................18
5. Circuit Diagram.........................................................................................................19
6. Troubleshooting........................................................................................................21
7. Checking Electrical Components.......................................................................... 27

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1.Range & Conditions
DB: Dry-bulb temperature
WB: Wet-bulb temperature
Rated Operating Conditions
Indoor Temperature
Outdoor Temperature
Cooling
27℃DB/19℃WB
35℃DB/24℃WB
Heating
20℃
7℃DB/6℃WB
Tubing Length (m)
3
Max. Operating Value
Indoor Temperature
Outdoor Temperature
Cooling
32℃DB/23℃WB
52℃DB
Heating
27℃
24℃DB/18℃WB

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2. Control Specifications
2.1 General introduction
The indoor fan motor uses PG；The compressor is 4 poles brushless motor which rotary
speed can be adjusted within 25-100rps.The outdoor controller has IPM transducer which
can control the compressor and PFC control circuit，and the power factor of complete unit
reaches up to more than 95%.
The aim of controlling：Temperature difference between indoor temperature and set
temperature. This unit has the following control:
2.1.1 Indoor fan motor controls（PG motor）
Fan speed：High,medium,low,gentle.
2.1.2 Outdoor fan motor (AC machine)
Fan speed：High,low.
2.1.3 Capacity control
Change the capacity of cooling and heating through changing the rotate speed of
compressor. The transducer can convert the voltage AC220V into volts d.c. and control the
power supply condition of compressor by IPM module.
2.1.4 Over current protection
Outdoor controller examines input current and the compressor begins to run after accepting
the order from indoor unit. When the current value exceeds the prescribed value, the
outdoor controller will decrease the rotate speed of compressor, in that case, compressor
can run at the speed by the order from indoor unit within the range of the current value does
not exceed the prescribed value.
2.1.5 High-loaded prevention（freeze-prevention）
Indoor heat exchanger examines the condensation temperature of refrigerant when the unit
is in heating operation.（evaporate temperature of refrigerant when cooling and heating）.If
the temperature exceeds the prescribed value,(or lower than the prescribed value），then
decrease the rotary speed of compressor to make compressor runs at the speed within the
prescribed temperature range in order to keep high pressure from excessive rising.（Or
keeping indoor heat exchanger from freezing.）
2.1.6 Blades control
Users can realize tridimensional airflow through controlling vertical blades.
Control the position of blades automatically according to operating condition. Press“vertical
airflow ”button to set the position of vertical blades freely. Electric control will store the
position of blades when the current is switched on.
2.1.7 Power-failure automatic reset
2.2 Panel display
2.2.1. See Q model for the details of panel display.

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2.2.2 Emergency Run button: The unit will be turned off when pressing this button when the
unit is in operation；
The unit will be turned on and operates in Smart mode after pressing this button when the
unit is in off status.
2.2.3 Press any key when the unit is in operation, the buzzer will give a buzz sound ; When
the unit is in off status, press the button of “on/off”, “air refresh” or “smart”, the unit will be
turned on with a buzz sound.
2.2.4 Please see the operating instructions for the usage of remote controller.
2.3 Blades Control
The blades range for vertical blades is from1-5 point position. Press “vertical airflow” button,
the blades will swing according to “1-2-3-4-5-swing-1-… “.But sometimes the blades can not
be controlled because the unit is in protect function.
2.3.1 Cooling, Dehumidification and Air refresh function:
The blades will swing circularly within the range of 1-4.
In cooling and dehumidification operation, louver blades can change the position
automatically to prevent from dripping.
2.3.2 Heating:
The blades will swing circularly within the range of 2-5.
During the course of heating beginning or defrosting（namely when the unit is in the pause
condition），the blades are in fixed position to avoid blowing cold airflow because of the too
low temperature of indoor evaporator. Only when the temperature of evaporator is higher
than 32℃，will the unit enter normal control.
2.4 Cooling
2.4.1 Indoor blower control:
The fan speed can be set as high, medium, low and auto level.
If changed to auto level, the indoor blower will choose the fan speed according to room
temperature and set temperature.
2.4.2 Cooling capacity control:
Calculating the difference value between the temperature detected by indoor pipe
temperature sensor and the prescribed indoor pipe value temperature to determine the
correction of frequency command signal, correct the frequency command signal currently
existing. When the indoor pipe temperature is lower than the prescribed indoor pipe value
temperature, the unit will decreases the rotary speed of compressor.
2.4.3 Freeze-prevention control:
Pipe coil sensor detects the temperature of indoor heat exchanger. If the temperature is
lower than the prescribed value, then the unit decreases the rotary speed of compressor to
keep the indoor heat exchanger from freezing. If the temperature exceeds the lower limit

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value, then please stop decreasing frequency; If the temperature exceeds the upper limit
value, then the unit will exists freeze-prevention protection. If the temperature is lower than
certain prescribed value, the unit will stop.
2.4.4 Over current-prevention control
If the value of input current detected by outdoor current sensor is higher than the prescribed
value, the rotary speed of compressor will be decreased and controlled in order to keep the
current value not higher than the upper limit value；compressor will come to normal
operation when the current value drops to the lower limit value；If current value is higher than
the upper limit value, compressor will stop.
2.4.5 Cooling overload working
In cooling operation, if the temperature of outdoor heat exchanger is too high, the speed of
compressor will be adjusted to a lower gear automatically ，and sometimes compressor may
be stopped.
2.4.6 Sleep control（soft operation）
Press“sleep” button on remote controller，the unit will control rotary speed of compressor
and indoor fan motor and enters sleep operation:
Rotary speed of fan motor：medium level or low level
Rotary speed of compressor：decrease
The set temperature will increase 1℃automatically after running for 1 hour; After running for
about 1 hour, the set temperature will increase 1℃ ；After running for another 1 hour, the set
temperature will go on increasing 1℃. The temperature will not increase when the set
temperature is higher than the prescribed value. The temperature will not exceeds the
prescribed value when lower than the prescribed value.
2.4.7 The highest rotary speed of compressor controlled by wind rate grade
To determine the highest rotary speed of compressor according to indoor and outdoor
temperature.
2.4.8 Outdoor Motor Control
The speed of outdoor motor is decided in low or higher according to the outdoor
surroundings temperature and the indoor pipe temperature.
2.4.9 Dry Mildew Proofing Operation
Indoor fan motor will go on running for a period of time after the unit is turned off
to dry surplus moisture remain in unit.
2.4.10 Compressor frequency control
A Frequency range of compressor is 25-100Hz。
B Original frequency of compressor：Set by original indoor temperature and surroundings
temperature.
C Running frequency of compressor is controlled by artificial intelligence.

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2.5 Heating
2.5.1 Indoor fan motor control
Fan speed：High,medium,low,auto.
If choosing “Auto” mode, then indoor fan motor chooses fan speed according to indoor
temperature and the set temperature.
2.5.2 Cool-airflow-prevention while heating
Avoid cool airflow：At the beginning of heating mode, if the temperature of indoor pipe coil is
lower than the prescribed value, and compressor stops or running time less than the
prescribed time （If exceeding the prescribed time,the unit will exist
cool-airflow-prevention.），the unit is in cool-airflow-prevention condition, then louver blades
can not swing and indoor fan motor stops. The PAUSE indicator lights during
cool-airflow-prevention period.
2.5.3 Heating capacity control
Calculating the difference value between the temperature detected by indoor pipe
temperature sensor and the prescribed indoor pipe value temperature to determine the
correction of frequency command signal, correct the frequency command signal currently
existing. When the indoor pipe temperature is higher than the prescribed indoor pipe value
temperature, the unit will decreases the rotary speed of compressor.
2.5.4 High-loaded control
Indoor pipe coil temperature sensor examines evaporator temperature, if temperature
exceeds the prescribed value, the frequency does not increase; if temperature exceeds
upper limit value, the rotary speed of compressor will be gradually decreased to avoid too
high heat load；if temperature is lower than the prescribed value, the frequency does not
decrease; if temperature is lower than lower limit value, unit will exist high-loaded control
and enters normal operation.
2.5.5 Over current control
If the value of input current detected by outdoor current sensor is higher than the prescribed
value, the rotary speed of compressor will be decreased and controlled in order to keep the
current value not higher than the upper limit value；compressor will come to normal
operation when the current value drops to the lower limit value；If current value is higher than
the prescribed value, compressor stops.
2.5.6 Defrosting control
2.5.6.1 Defrosting test
When machine is in heating mode, it controls defrosting through defrosting sensor (Te)
detecting the frost level of heat exchanger.
2.5.6.1.1The first conditions of entering defrosting:
2.5.6.1.1.1 The prerequisite of defrosting: heating compressor is running for 10 minutes and
45 minutes in total ( general defrosting)/ 90 minutes 【（low temperature defrosting：outer
environmental temperature is under －6℃】；

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2.5.6.1.1.2 Sufficient conditions of entering defrosting as below:
2.5.6.1.1.2.1 Not to enter defrosting if outer environmental temperature is above 15℃;
2.5.6.1.1.2.2 Enter defrosting if outer environmental temperature is under -6℃and
defrosting temperature is less or equal to -15℃for 5 minutes;
2.5.6.1.1.2.3 Enter defrosting if outer environmental temperature is between 【5℃－15℃】
and defrosting temperature is less or equal to -6℃for 5 minutes;
2.5.6.1.1.2.4 Enter defrosting if outer environmental temperature is between 【-6℃－5℃】
and defrosting temperature is less or equal to TeS for 5 minutes.
TeS=C*outer environmental temperature-A A=8 Outer environmental temperature<0℃
C=0.8 outer environmental temperature >=0℃C=0.6
2.5.6.1.2The second conditions of entering defrosting:
Compressor runs for 3 hours, but not to enter defrosting and temperature of condenser pipe
is less -2℃for 3 minutes
2.5.6.2 Defrosting operation
Stop compressor first and turn off 4-way valve relay and outdoor fan motor；Turn on
compressor again. Outdoor fan stops while defrosting.
2.5.6.3 Existing defrosting
Defrosting operation will change into heating operation when meeting any of the following
condition:
1）Outdoor heat exchange is higher than the prescribed value.
2）Outdoor heat exchange is higher than the prescribed value for a consecutive period of
time.
3）Time of defrosting is longer than the longest time of prescribed time.
2.5.6.3 Defrosting note:
2.5.6.3.1 Machine will not stop when the compressor frequency doesn’t go up to 80Hz,
switched to non-heating mode after entering defrosting.
2.5.6.3.2 Sensor error code will not be shown in the display of indoor during defrosting even
if the sensor has problems, but the error code will be shown 3 minute after the compressor
starts to run when the machine is restarted after defrosting exits, or the compressor will
open or close according to the environmental temperature.
2.5.6.3.3 The outdoor unit will not detect the temperature of indoor sensor during
defrosting.(The outdoor unit always detects the inner environmental temperature, but the
detected result is no use for outdoor unit.)
2.5.6.3.4 The conditions of ending defrosting must be detected 2 minutes after the
compressor starts to run.
2.5.6.3.5 Compressor running time record will not be refreshed if the machine is not
switched to non-heating mode, even if the machine is turned off.
2.5.7 Blowing surplus energy function
When turning off compressor, indoor fan motor chooses low speed operation( gentle/stop)

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according to temperature of indoor pipe coil to make the best of surplus energy of indoor
pipe coil.
2.5.8 Temperature control for compressor vent
Vent temperature sensor detects the temperature of refrigerant air exhausted from
compressor and control rotary speed of compressor（same as cooling and heating）to ensure
high efficient operation of system.
2.5.9 Sleep control（soft operation）
Press“sleep” button on remote controller，the unit will control rotary speed of compressor
and indoor fan motor and enters sleep operation:
Rotary speed of fan motor：medium level or lower lever
Rotary speed of compressor：decrease
The set temperature will decrease 1℃automatically after running for 1 hour; After running
for another 1 hour, the set temperature will go on decreasing 1℃. But the set temperature
displayed on LED will remain unchanged.
2.5.10 Outdoor fan motor control（except defrosting）
The speed of outdoor motor is decided in low or higher according to the outdoor
surroundings temperature and the indoor pipe temperature.
2.5.11 compressor frequency control
A Frequency range of compressor is 25-100Hz。
B Original frequency of compressor：Set by original indoor temperature and surroundings
temperature.
C Running frequency of compressor is controlled by artificial intelligence.
2.6 “Smart”function
The unit will judge the operation mode automatically after receiving the SMART signal.
2.6.1 Original set temperature：Choosing indoor temperature according to set temperature.
2.6.2 Original mode ：Choosing original mode according to outdoor temperature and
indoor temperature. There are three modes are available: cooling, heating, fan sweep
Fan sweep mode：High level，louver blades swing automatically and can be adjustable.
In“Smart”mode, all additional function is available. Indoor fan speed is set as automatic and
louver swing automatically. Outdoor rotary speed is controlled according to the
corresponding mode, and users can adjust position of louver and temperature.
Unit will judge next working mode after finishing operation of a kind of mode. If in fan sweep
mode, unit will enter mode to judge program every per minute until enter cooling or heating
mode.
2.6.3 Judge mode again：Choosing cooling(heating/fan sweep) mode according to indoor,
outdoor temperature and the set temperature.

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2.7 Dehumidification
2.7.1 When indoor temperature is higher than a certain temperature value, and higher
than(set temperature），unit operates in cooling mode and outdoor fan speed is the same
with the speed in cooling operation；or unit operates in dehumidifying operation according to
indoor temperature and outdoor fan motor is at low speed level.
When indoor temperature is higher than the upper limit value, compressor operates by a
certain prescribed frequency.
When indoor temperature is between upper limit temperature and lower limit temperature，
compressor operates by a prescribed frequency.
When indoor temperature is lower than lower limit temperature, compressor stops.
2.7.2 Fan motor runs at low speed level.
2.7.3 Freeze-prevention control: same as cooling mode.
2.7.4 Dry Mildew Proofing Operation: same as cooling mode.
2.8 Other functions
2.8.1 Timelag protection function for compressor
In order to protect compressor（expect for defrost mode）,there will be a 3-minute delay to
restart when compressor stops from working condition. And there is still 3 minute delay
when the compressor is firstly started.
2.8.2 Automatic restart
This function refers to：When the electricity comes again after power failure, the unit is
required to get back to the condition before power failure automatically. The mode, set
temperature, air refresh, sleep, lock for the safety of children, humidification and air
ventilation all keep in the same condition before power failure.
This function can be set or cancelled through EEPROM device on electric board or the
installation of peripheral circuit.
2.8.3 Independent air refresh function
Press “air refresh”button on remote controller when the unit is in off status, the unit is in Fan
Sweep mode. Press this button again, this function can be cancelled.
2.8.4.Timing on/off
1. Turn on the air conditioner on timer: The air conditioner will starts operation at the set
time.“time on”function is only effective for once in 24 hours. If user turns on the air condition
by pressing on/off button on the remote controller before the set time, then” timing on”
function will be cancelled. If user select “timing on” when the air conditioner is in on status,
the air conditioner will stop immediately and restart automatically at set time.
2. Timing off: The air conditioner will exit running at set time. ” timing off” function is only
effective for once in 24 hours. If user turns off the air condition by pressing on/off button on

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the remote controller before the set time, then” timing on” function will be cancelled. If user
selects “timing off” when the air conditioner is in off status, the air conditioner will run
immediately and stop automatically at set time.
3. Program timing control：Air conditioner is turned on/off automatically at set time every
day. if user turn off the air conditioner by pressing off button before the set time, then the
“timing off” function will be cancelled but the “timing on” function is still effective；If user turns
off the air conditioner by pressing on the emergency button before the set time, then the
program timing control will be cancelled. If user turn on the air conditioner by pressing on the
on button on the remote controller before the set time, then timing on function will be
cancelled but the timing off function is still effective; if the user turn of the air conditioner by
pressing on emergency button before set time, then the program timing control will be
cancelled.
2.8.5 Induction function(of remote controller)
The remote controller sends the room temperature signal to air conditioner once time in
every 3 minutes, and the unit will run according the signal. To detect the room temperature,
remote controller must be placed in the area where the signal of remote control can be
received. If the signal from remote control can not be received in 5 minutes, the air
conditioner will operate according to the temperature which detected by indoor temperature
sensor.

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2.9 Failure indication
A．Failure indication for outdoor unit：
The red light will flash when there is any failure happened.Otherwise, no red light is on.
The green light will be on when outdoor unit is with electricity.
B．Failure indication for indoor unit：
1.PG motor failure---F0
2.Indoor temperature sensor failure---F1
3.Outdoor temperature sensor failure---F2(The red light on outdoor PCB will flash twice)
4.Indoor pipe coil temperature sensor failure---F3
5.Outdoor pipe coil temperature sensor failure---F4(The red light on outdoor PCB will flash
one time)
6.Exhausting temperature sensor failure---F5(The red light on outdoor PCB will flash 4
times)
7.Indoor communications can not be accepted---F6(The red light on outdoor PCB will flash 6
times)
8.Outdoor unit and IPDU communications failure---F8(The red light on outdoor PCB will
flash 14 times)
9.IPM module protection---F9(The red light on outdoor PCB will flash 7 times)
10.Indoor EEPROM on PCB failure---FD
11.Outdoor EEPROM on PCB failure---FE(The red light on outdoor PCB will flash 5 time)
12.Compressor overhead protection----E0(The red light on outdoor PCB will flash 11 times)
13.IPM over current protection---E3(The red light on outdoor PCB will flash 12 times)
14．IPDU current sensor (no or failure)---E3(The red light on outdoor PCB will flash 12 times)
15.IPDU position circuit failure ---E6(The red light on outdoor PCB will flash 19 times)
16.Compressor speed up abnormally---E7(The red light on outdoor PCB will flash 18 times)
17.Compressor is stemmed ---E7(The red light on outdoor PCB will flash 15 times)
18.Compressor desynchronizing while running---E7(The red light on outdoor PCB will flash
17 times)
19.Compressor failure ---E8(The red light on outdoor PCB will flash 16 or 20 times)
20.Board temperature too high---E9(The red light on outdoor PCB will flash 13 times)
C.Failure indication for indoor unit：：
1. Protection for compressor exhausting temperature----P1(The red light on outdoor PCB
will flash 25 times)
2.Defrosting----P3
3.Heating overload----P4(The red light on outdoor PCB will flash 27 times)
4.Freeze-prevention----P5(The red light on outdoor PCB will flash 28 times)
5.Cooling overload----P6(The red light on outdoor PCB will flash 26 times)

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2.10 UVC function and specifications
Press the UVC bottom on remote controller to start or stop UVC sterilize function.
Note：Read the maintenance instructions before opening the device.
1.This appliance contains a UVC lamp.
2.Unintended use of the appliance or damage to the housing may result in the escape of
dangerous UVC radiation. UVC radiation may, even in small doses, cause harm to the eyes
and skin.
3.Appliances that are obviously damaged must not be operated. Prior to cleaning or other
maintenance, the appliance must be disconnected from the supply mains.
4.If applicable, precautions to be taken when replacing UVC emitters and starters;
5.Disconnect the power supply before replacing the UVC lamp;
6.Doors and access panels with a UV radiation hazard symbol may have UVC spectral
irradiance greater than 1,7 W/ cm2 and are equipped with an interlock switch to disconnect
UVC lamp power for safety. Don't go beyond;
7.It is recommended to disconnect the power supply before opening doors and access
panels with UV hazard symbols for user maintenance.
8.UVC barriers with UV radiation hazard symbols should not be removed;
9.For appliances fitted with UVC lamps, provide information on replacement of UVC lamps,
including model number and/or part number;
10.In the case of field installation, a factory-designated UVC sterilization lamp system
approved for use in this product shall be specified in the operating instructions by a
particular model;
11.Do not operate THE UVC lamp outside the device

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3. Exploded view
3.1 Exploded view for indoor unit

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NO.
Materails Description
NO.
Materails Description
1
Front panel subassembly
22
electric heating tube
2
Front panel
23
Positive and negative ion generate
3
Air filter
24
Sensor bracket
4
Medium frame subassembly
25
Electric control board
5
Screw cover
26
Spring
6
Evaporator subassembly
27
Display box
7
pressure plate
28
Display P.C.B assembly
8
Bearing
29
WIFI subassembly
9
Bottom frame subassembly
30
Electric control box board(metal)
10
Stepping motor
31
Cover of electirc control box
11
Blade
32
Transformer
12
Wall-Mounting frame
33
Terminal board
13
Pipe pressure plate
34
Wire pressure plate
14
Drainage pipe subassembly
35
Electirc control box
15
Stepping motor
36
P.C.B assembly
16
Crossflow fan
37
Electric control box(metal shell)
17
Motor Bracket (bottom)
38
Power line
18
Fan motor
39
Room temperature sensor
19
Motor Bracket（top)
40
Pipe temperature sensor
20
Motor cover
41
Negative ion generator
21
Negative ion generator
NOTE:Actual product may be different from above graphics,please refer to
actual products.

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3.2 Exploded view for outdoor unit

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NOTE:Actual product may be different from above graphics,please refer to
actual products.
NO.
Enlish description
1
front net cover
2
front plate subassembly
3
propeller fan
4
fan motor
5
motor bracket subassembly
6
bottom plate subassembly
7
Metal support
8
partition board
9
Top cover assembly
10
condenser subassembly
11
rear net cover
12
Sensor holder
13
capillary subassembly
14
outdoor electric control subassembly
15
Platen
16
Terminal seat
17
Electrical inseallation board
Electrical inseallation board
18
reactor
19
electric cover subassembly
20
Valve mounting plate
21
Lateral plate assembly
22
cut-off valve 3/8
cut-off valve 1/4
23
four-way valve subassembly
24
compressor

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4. Refrigerant Flow Diagram
Thermal insulating of refrigerant pipeline
To prevent heat loss and condensed water from dropping on the floor, the wide and narrow tube of
air conditioner should be wrapped with thermal insulating materials. For using capillary tube, and the
tubes are in low temperature, the thickness of thermal insulating materials shall be more than 8mm.

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5. Circuit Diagram
5.1 Electrical wiring diagram for indoor unit
To avoid electrical shock hazard, be sure to disconnect power before
checking, servicing and/or cleaning any electrical parts.
Warning

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5.2 Electrical wiring diagram for outdoor unit
To avoid electrical shock hazard, be sure to disconnect power
before checking, servicing and/or cleaning any electrical parts.
Warning