Midea LRSJF-V N1 User manual

OWNER'S MANUAL
Thank you very much for purchasing our product.
Before using your unit, please read this manual carefully and keep it for future reference.
DC INVERTER FREE

Fix leg
Refrigerant pipingconnection part(connection part in side)
air inlet
air outlet
Fig.1
All the pictures in this manual are for explanation purpose only. They may be slightly different from the heat pump
you purchased(depend on model). The actual shape shall prevail.
NOTE
1
2
3
4
1
2 3 4
2
1
3 4
6kw and 8kw
10kw and 12kw

1. IMPORTANT SAFETY INFORMATION
To prevent injury to the user or other people and property
damage, the following instructions must be followed. Incorrect
operation due to ignoring of instructions may cause harm or
damage.
WARNING
Use of wire or copper wire may cause the unit to break down
or cause a fire.
It is not good for your health to expose your body to the
air flow for a long time.
Do not insert fingers, rods or other objects into the air
inlet or outlet.
When the fan is rotating at high speed, it will cause injury.
Never use a flammable spray such as hair spray,
lacqueror paint near the unit.
It may cause a fire.
Never touch the air outlet or the horizontal blades while
the swing flap is in operation.
Fingers may become caught or the unit may break down.
Never put any objects into the air inlet or outlet.
Objects touching the fan at high speed can be dangerous.
Never inspect or service the unit by yourself.
Ask a qualified service person to perform this work.
Do not dispose this product as unsorted
municipal waste. Collection of such waste
separately for special treatment is necessary.
Do not dispose of electrical appliances as unsorted
municipal waste, use separate collection facilities.
CAUTION
1
owner's manual
Contact you local government for information regarding the
connection systems available.
If electrical appliances are disposed of in landfills or
dumps, hazardous substances can leak into the
groundeater and get into the food chain, damaging your
health and well-being.
To prevent refrigerant leak, contact your dealer.
When the system is installed and runs in a small room, it is
required to keep the concentration of the refrigerant, if by any
chance coming out, below the limit. Otherwise, oxygen in the
room may be affected, resulting in a serious accident.
The refrigerant in the heat pump is safe and normally
does not leak.
If the refrigerant leaks in the room, contact with a fire of a
burner, a heater or a cooker may result in a harmful gas.
Turn off any combustible heating devices, ventilate the
room, and contact the dealer where you purchased the
unit.
Do not use the heat pump until a service person confirms that
the portion where the refrigerant leaks is repaired.
WARNING
The safty precautions listed here are divided into two categories.
either case, important safty information is listed which must be read
carefully.
CAUTION
Failure to observe a caution may result in injury or damage
to the equipment.
Failure to observe a warning may result in death. The
appliance shall be installed in accordance with national
wiring regulations.
Do not use the heat pump for other purposes.
In order to avoid any quality deterioration, do not use the unit
for cooling precision instruments, food, plants, animals or
works of art.
Before cleaning, be sure to stop the operation, turn the
breaker off or pull out the supply cord.
Otherwise, an electric shock and injury may result.
In order to avoid electric shock or fire, make sure that an
earth leak detector is installed.
Be sure the heat pump is grounded.
In order to avoid electric shock, make sure that the unit is
grounded and that the earth wire is not connected to gas or
Ask your dealer for installation of the heat pump.
Incomplete installation performed by yourself may result in a
water leakage, electric shock, and fire.
Ask your dealer for improvement, repair, and
maintenance.
Incomplete improvement, repair, and maintenance may result
in a water leakage, electric shock, and fire.
In order to avoid electric shock, fire or injury, or if you
detect any abnormality such as smell of fire, turn off the
power supply and call your dealer for instructions.
Never let the indoor unit or the remote controller get wet.
It may cause an electric shock or a fire.
Never press the button of the remote controller with a
hard, pointed object.
The remote controller may be damaged.
Never replace a fuse with that of wrong rated current or
other wires when a fuse blows out.
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CONTENTS PAGE
IMPORTANT SAFETY INFORMATION.........................................................
PARTS NAMES.........................................................................................
OPERATION RANGE...................................................................................
OPERATION AND PERFORMANCE.............................................................
MALFUNCTION CODE OF OUTDOOR UNIT.................................................
FOLLOWING SYMPTOMS ARE NOT HEAT PUMP ROUBLES....................
TROUBLESHOOTING.................................................................................

water pipe, lightning conductor or telephone earth wire.
In order to avoid injury, do not remove the fan guard of
the outdoor unit.
Do not operate the heat pump with a wet hand.
An electric shock may happen.
Do not touch the heat exchanger fins.
These fins are sharp and could result in cutting injuries.
Do not place items which might be damaged by moisture
under the indoor unit.
Condensation may form if the humidity is above 80%, the
drain outlet is blocked or the filter is polluted.
After a long use, check the unit stand and fitting for
damage.
If damaged, the unit may fall and result in injury.
To avoid oxygen deficiency, ventilate the room
sufficiently if equipment with burner is used together
with the heat pump.
Arrange the drain hose to ensure smooth drainage.
Incomplete drainage may cause wetting of the building,
furniture etc.
Never touch the internal parts of the controller.
Do not remove the front panel. Some parts inside are
dangerous to touch, and a machine trouble may happen.
The function of text run circulate as fowlling.
Never expose little children, plants or animals directly to
the air flow.
Adverse influence to little children, animals and plants may
result.
Do not allow a child to mount on the outdoor unit or
avoid placing any object on it.
Falling or tumbling may result in injury.
Do not operate the heat pump when using a room
fumigation - type insecticide.
Failure to observe could cause the chemicals to become
deposited in the unit, which could endanger the health of
those who are hypersensitive to chemicals.
Do not place appliances which produce open fire in
places exposed to the air flow from the unit or under the
indoor unit.
It may cause incomplete combuston or deformation of the unit
due to the heat.
Do not install the heat pump at any place where
flammable gas may leak out.
If the gas leaks out and stays around the heat pump, a fire
may break out.
The appliance is not intended for use by young children
or infirm persons without supervision.
Young children should be supervised to ensure that they
do not play with the appliance.
The outdoor unit window-shades should be periodic
cleaning in case of being jammed.
This window-shapes is heat dissipation outlet of components,
if being jammed will cause the components shorten their
service life spans because of overheated for a long time.
The temperature of refrigerant circuit will be high, please
keep the interconnection cable away from the copper
tube.
2. PARTS NAMES
The heat pump consists of the indoor unit, the outdoor
unit, the connecting pipe and the remote controller. (see Fig.1)
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owner's manual
Force Cooling Control
Display function
MAIN BOARD
Force cooling
control Button sw2 Display control button sw1
Force Cooling Control
Fig.2-2
(OUTDOOR UNIT)
Fig.2-3
Force cooling control of outdoor unit be pressed once that a order
to force cooling in indoor unit. When the frequence of outdoor unit
change to 62Hz(
6kw and 8kw ) or 44Hz ( 10kw and 12kw )
then running it; indoor fan run in high speed. Press the button again
will exit the Force Cooling Control.
10kw and 12kw
6kw and 8kw
sw2 sw1
PMV opening
Actual current value
Actual voltage AD value
T2/T2B average temperature
Total quantities of the interior
units
The last fault or protection
code (if there is no fault or
protection code it will be
display “00”)
Display “--”
Normal display
Operating mode
(0—Standby; 2—Cooling;
3—Heating; 4—Forced
cooling）
Operating fan speed grade
(0—Power off;1—Low fan
speed;
The total capacity
requirements of the
interior unit
T3 piping temperature
T4 environmert temperature
Tp discharge temperature
(actual) (if it is over one
hundred, it will be only
display the hundreds
place and the tens place)
2—High fan speed)
Actual voltage AD value
Actual voltage AD value
(Fish checking)
The surface temperature of
the cooling fin
PMV opening
Actual current value
Actual voltage AD value
T2 average temperature
Total quantities of the interior
units
The quantities of the operating
interior units
The last fault or protection
code (if there is no fault or
protection code it will be
display “00”)
Display “--”
Normal display
Operating mode
(0—Stanby; 2—Cooling;
3—Heating; 4—Forced
cooling）
Operating fan speed grade
(0—Power off)
The total capacity
requirements of the
interior unit
The capacity requirements
of the revised external unit
T3 piping temperature
T4 environmert temperature
T5 discharge temperature
(actual) (if it is over one
hundred, it will be only
display the hundreds
place and the tens place)

NOTE
●12 hours preheating is imperative after turn on the power
switch. Please do not shut down the power when the unit
is supposed to stop running in 24h or shorter time. (This is
to warm the crankcase heat box to avoid compulsive start
of condenser.)
●Pay attention not to block the air inlet and outlet.
Blocks may decrease the efficiency of the unit or startup the
protector, which will stop running.
3. OPERATION RANGE
Use the system in the following temperature for safe and
effective operation. The Max operation temperature for
the heat pump. (Cooling/Heating)
Cooling operation
Heating operating
Mode
Temperature
Outdoor
temperature
Water
temperature
15℃～43℃ 7 22℃～ ℃
NOTE
1.
2.
3.
If heat pump is used outside the above conditions, it may
cause the unit to function abnormally.
The phenomenon is normal that the surface of indoor unit
may condense water when the relative larger humidity in
room, please close the door and window.
Optimum performance will be achieved within these
operating temperature range.
15℃～55℃
Table 3-1
-15℃～43℃
3
4. OPERATION AND PERFORMANCE
4.1 Protection Equipment
The protection equipment may be activated in following conditions:
●The air inlet or air outlet of outdoor unit is blocked.
●Strong wind is Continuously blowing to the air outlet of the
outdoor unit.
●Too much rubbish adhere to the filter in the indoor unit
●The air outlet of indoor unit is choked
Cooling Operation
Heating Operation
When the protection equipment starts, please shut down the
manual power switch, and restart operation after problem is
solved.
This Protection Equipment will enable the Heat Pump to stop
when the Heat Pump is to be directed running compulsively.
When the Protection Equipment is activated, the Operation
Indicator still lights while the Heat Pump is not running. But the Check
Indicatior Lights.
NOTE
4.2 About power cut
If power is cut during operation, stop all the operation immediately.
Power comes again. The lamp on the display panel of indoor unit
flashes. And then unit will auto-restart.
●Mishandling in operation:
If mishandling happens because of lighting or mobile wireless,
please shut off the manual power switch, and turn on again, then
push the ON/OFF button.
4.3 Heating capacity
The heating operation is a heat-pump process that heat will be
absorbed from outdoor air and released to indoor water. Once
the outdoor temperature is decreased, heating capacity
decreased corredpindingly.
Other heating equipment is suggested to be used together when
outdoor temperature is too low.
In some extreme cold upland that buy another inddoor unit
equipped electrical heater will obtain better performance.(Refer
to indoor unit owner’s manual for details)
NOTE
If the heat pump malfunction occurs because of disturb,
pleasereconnect the heat pump to power, then turn on it
again.
1.
2.
owner's manual
A protection feature prevents the heat pump from being
activated for approximately 3 minuites when it restarts
immediately after operation.
The the indoor unit in the same system can not run cooling
and heating at the same time.
4.6 Features of heating operation
Water will not become hot immediately at the beginning of
the heating operation, 3~5 minutes ago (depends on the indoor
and outdoor temperature), until the indoor heat exchanger
become hot, then becomes hot.
During operation, the fan motor in the outdoor unit may stop
running under high temperature.
4.7 Defrost in the heating operation
During heating operation, outdoor unit sometimes will frost. To
increase efficiency, the unit will start defrosting automatically
(about 2~10 minutes), and then water will be drained out from
outdoor unit.
During defrosting, the fan motors in the outdoor unit will
stop running.
If the Heat Pump Administrator has set running mode, then
the heat pump can not run on modes other than the presetted.
Standby or No Priority will be displayed in the Control Panel.
4.4 Three-minute protection feature
4.5 Cooling and heating operation
■
■
The motor in Indoor Unit will continue running for 20~30
seconds for to remove residual heat when the Indoor
Unit recoeiving OFFcommand during heating operation.

5 MALFUNCTION CODE OF OUTDOOR UNIT
owner's manual
4
6. FOLLOWING SYMPTOMS ARE NOT
HEAT PUMP TROUBLES
Symptom 1: The system does not operate Symptom 2: Change into the Pump mode
during heating mode
The heat pump does not start immediately after the ON/OFF
button on the romote controller is pressed.
If the operation lamp lights, the system is in normal condition.To
prevent overloading of the compressor motor, the heat pump
starts 3 minutes after it is turned ON.
If the operation lamp and the "
PRE-DEF indicator(cooling and
heating type) or fan only indicator(cooling only type)" light, it
means you choose the heating model.
When the outlet water temperature drops to the set
temperature, the compressor goes off and the indoor unit
changes to pump mode; when the temperature rises up, the
compressor starts again. It is same in the heating mode.
.
Symptom 3: White mist comes out of outdoor
unit
Table 5-1
Model
E0
E2
E3
E4
E5
P0
P1
P2
P3
P4
P5
P6
P8
P7
EEPROM error
Communication error of the outdoor chip
and the indoor chip
Communication error of 9177and IPDU Communication error of outdoor chip and DSP
Outdoor temperature sensor error
Voltage protection error
T3, T4 sensor error
E6
E7
E8
Direct-current fan error
Heating fan error in the area A lasts for 5 minutes
There are two times E6 error in 10 minutes
(recovery will be after power off)
The cooling fin high temperature protection
High pressure protection
Low pressure protection
Compressor current protection
Discharge temperature protection
Outdoor condenser T3 high temperature protection
Typhoon protection
IPDU modules protection Module protection
Evaporator T2 high temperature protection
Do not match with the indoor and outdoor units
Display Malfunction or Protection
6kw and 8kw10kw and 12kw
Display Function Instruction:
1. When stand by, LED displaying the amount of indoor units online which communicate with
outdoor units.
2. When operation, LED displaying frequency value of compressor.
3. When defrost, LED displaying “dF”.
H0

Symptom 4: Noise of heat pump’s cooling
Symptom 3.1: Outdoor unit
Symptom 4.1: Outdoor unit
When the system is changed over to heating operation after
defrost operation Moisture generated by defrost becomes
steam and is exhausted.
A continuous low hissing sound is heard when the system is in
operation.
This is the sound of refrigerant gas flowing through both indoor
and outdoor units.
A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation.
This is the noise of refrigerant caused by flow stop or flow
change.
When the tone of operating noise changes.
This noise is caused by the change of frequency.
Symptom 5: Dust comes out of the unit
Symptom 6: The units can give off odours
When the unit is used for the first time in a long time.
This is because dust has gotten into the unit.
The unit can absorb the smell of rooms, furniture, cigarettes,
etc., and then emit it again.
Symptom 7: The outdoor unit fan does not
spin.
During operation. The speed of the fan is controlled in order to
optimize product operation.
The operation lamp is flashing rapidly (twice every second)
This lamp is still flashing rapidly after turn off the power and turn
on again.
Remote controller receives malfunction or the button does not
work well.
A safety device such as a fuse, a breaker frequently actuates.
Obstacles and water enter the unit.
Water leaks from indoor unit.
Other malfunctions.
7. TROUBLESHOOTING
If one of the following malfunctions occur, stop operation, shut
off the power, and contact with your dealer.
If the system does not properly operate except the above
mentioned cases or the above mentioned malfunctions is
evident, investigate the system according to the following
procedures. (see in Table 7-1)
7.1. Troubles and causes of heat pump
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owner's manual
Solution
Clean the heat exchanger.
Clean the water filter.
Eliminate all dirties and make air
smooth.
Make curtains in order to shelter from
sunshine.
Reduce heat source.
AC cooling capacity reduces (normal).
Check leakage and rightly recharge
refrigerant.
Causes
Unit does not start
Air flowing normally but
completely can't cooling
Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote controller exhausted
or other problem of controller.
Temperature is not set correctly.
Be in 3 minutes protection of
compressor.
Refrigerant is too little or too much.
Air or no concreting gas in the
refrigerating circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Outdoor unit and indoor unit heat
exchanger is dirty.
The water filter is dirty.
Inlet/outlet of indoor/outdoor units is
blocked.
Sunlight directly shine.
Too much heat resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of
refrigerant.
Wait for the comeback of power.
Switch on the power.
ReplLocation:
Replace the batterises or check the
controller.
Set the temperature properly.
Wait.
Check leakage, and rightly recharge
refrigerant.
Vacuum and recharge refrigerant.
Maintenance or change compressor.
Install manostat.
Find reasons and solution.
Use heating device.
Check leakage and rightly recharge
refrigerant.
Outdoor temperature is lower than 7 C
Leakage of refrigerant or lack of
refrigerant.
Table 7-1
Units start or stop frequently
Low cooling effect
Low heating effect
Water flowing normally but
completely can't cooling
Unit does not start
Symptoms

MDV10U-017CW
202000171551