mundoclima MUEX-14-H3.2 Service manual

MULTI INVERTER H3
Outdoor unit
MUEX-H3
English
CL20810 to CL20814
Owner's & installation manual
www.mundoclima.com

1
CONFORMITY AND RANGE GENERAL INFORMATION
CONTENTS GENERAL INFORMATION
1
5
6
7
8
11
15
16
17
17
18
Electrical Connections
Pimping between the indoor and outdoor units
Maintenance
Installation Dimension Diagram
Check After Installation
Bleeding
Conformity And Range
The Instructions Before Use
Name of Parts
Outdoor Unit Working Temperature Range
GENERAL
INSTALLER INFORMATION
Please read this owner's manual carefully before operating the unit and keep it carefully for consultation.
Only use the air conditioner as instructed in this booklet. These instructions are not intended to
cover every possible condition and situation. As with any electrical household appliance, common sense
and caution are therefore always recommended for installation, operation and maintenance.
The products in this manual may be different with the real one, according to different models,
some models have displayer and some models without displayer, the position and shape of
the displayer please refer to the real one.
In line with the company’s policy of continual product improvement, the aesthetic and dimensional
characteristics, technical data and accessories of this appliance may be changed without notice.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety.
Children should be supervised to ensure that they do not play with the appliance.
This marking indicates that this product should not be disposed with other
household wastes throughout the EU. To prevent possible harm to the
environment or human health from uncontrolled waste disposal, recycle
it responsibly to promote the sustainable reuse of material resources. To
return your used device, please use the return and collection systems or
contact the retailer where the product was purchased. They can take this
product for environmental safe recycling.
2
Warning
Technical Data
9
Dimensions
Troubleshooting 19

2
GENERAL INFORMATION
Warning
Operation and Maintenance
This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory capabilities or lack of experience
and knowledge if they have been given supervision or instruction concerning
use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without
supervision.
Do not connect air conditioner to multi-purpose socket. Otherwise, it may
cause fire hazard.
Do disconnect power supply when cleaning air conditioner. Otherwise, it
may cause electric shock.
If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
Do not wash the air conditioner with water to avoid electric shock.
Do not spray water on indoor unit. It may cause electric shock or malfunction.
After removing the filter, do not touch fins to avoid injury.
Do not use fire or hair dryer to dry the filter to avoid deformation or fire hazard.
Maintenance must be performed by qualified professionals. Otherwise, it may
cause personal injury or damage.
Do not repair air conditioner by yourself. It may cause electric shock or damage.
Please contact dealer when you need to repair air conditioner.
Do not extend fingers or objects into air inlet or air outlet. It may cause personal
injury or damage.
Do not block air outlet or air inlet. It may cause malfunction.
Do not spill water on the remote controller; otherwise the remote controller may
broken.
When below phenomenon occurs, please turn off air conditioner and disconnect
power immediately，and then contact the dealer or qualified professionals for
service.
Power cord is overheating or damaged.
There’s abnormal sound during operation.
Circuit break trips off frequently.
Air conditioner gives off burning smell.
Indoor unit is leaking.

3
GENERAL INFORMATION
Warning
If the air conditioner operates under abnormal conditions, it may cause
malfunction，electric shock or fire hazard.
When turning on or turning off the unit by emergency operation switch, please
press this switch with an insulating object other than metal.
Do not step on top panel of outdoor unit or put heavy objects. It may cause
damage or personal injury.
Attachment
Installation must be performed by qualified professionals. Otherwise, it may
cause personal injury or damage.
F ollow the electric safety regulations when installing the unit.
According to the local safety regulations, use qualified power supply circuit
and circuit break.
Do install the circuit break. If not, it may cause malfunction.
An all-pole disconnection switch having a contact separation of at least 3mm in
all poles should be connected in fixed wiring.
Including a circuit break with suitable capacity, please note the table.
Air switch should be included magnet buckle and heating buckle function, it can
protect the circuit-short and overload.
Air Conditioner should be properly grounded. Incorrect grounding may cause
electric shock.
Do not use unqualified power cord.
Properly connect the live wire, neutral wire and grounding wire of power socket.
Do not put through the power before finishing installation.
If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
Be sure to cut off the power supply before starting any work related to
electricity and safety.
Make sure the power supply matches with the requirement of air conditioner.
Unstable power supply or incorrect wiring or malfunction. Please install proper
power supply cables before using the air conditioner.
The temperature of refrigerant circuit will be high, please keep the
interconnection cable away from the copper tube.
The appliance shall be installed in accordance with national wiring regulations.
Installation must be performed in accordance with the requirement of NEC and
CEC by authorized personnel only.

4
GENERAL INFORMATION
Warning
The air conditioner is the first class electric appliance. It must be properly
grounding with specialized grounding device by a professional. Please make
sure it is always grounded effectively, otherwise it may cause electric shock.
The yellow-green wire in air conditioner is grounding wire, which can't be used
for other purposes.
The grounding resistance should comply with national electric safety regulations.
The appliance must be positioned so that the plug is accessible.
All wires of indoor unit and outdoor unit should be connected by a professional.
If the length of power connection wire is insufficient，please contact the
supplier for a new one. Avoid extending the wire on yourself.
For the air conditioner with plug, it should be reachable after finishing
installation.
For the air conditioner without plug, an circuit break must be installed in the line.
If you need to relocate the air conditioner to another place, only the qualified
person can perform the work. Otherwise, it may cause personal injury or damage.
Select a location which is out of reach for children and far away from animals or
plants. If it is unavoidable, please add the fence for safety purpose.
The indoor unit should be installed close to the wall.

THE INSTRUCTIONS BEFORE USE GENERAL INFORMATION
WARNING
When having a burning smell or
smoke, please turn off the power
supply and contact with the ser-
vice center.
If the abnormity still exists,the unit
may be damaged,and may cause
electric shock or fire.
Power must adopt the special
circuit to prevent fire.
Otherwise, it can cause electric
shock or fire.
Disconnect the power supply if
long putting the air conditioner
out of use.
Otherwise,the accumulated dusts
may cause overheating or fire.
Never damage the electric wire
or use the electric wire which is
not appointed.
Otherwise,it will cause overheating
or fire.
When cleaning,it is necessary
to stop driving and turn off the
power supply.
Cut off power supply
Otherwise,it may cause electric
shock or damage.
The power supply must adopt the
special circuit that with air switch
protection and assure it has enou-
gh capacity. The unit will be turned
on or off according to your requir-
ement automatically, please do not
turn on or turn off the unit freque-
ntly,otherwise disadvantage effect
may be caused to the unit.
Rated voltage of this air conditi-
oner 220-240V, 50Hz, The com-
pressor will vibrate sharply if the
voltage is too low.
Damage to refrigerating system.
Electrical component are easy to
damage if the voltage is too high.
Don't attempt to repair the air
conditioner by yourself.
The wrong repair will lead to an
electric shock or fire, so you should
contact the service center to repair.
Don't step on the top of the
outdoor unit or place something
on it.
If it is damaged, it may lead to the
fall of the unit and cause the injury.
Please note whether the insta-
lled stand is firm enough or not. Earthing: The unit must be reli- ably earthed. The earthing cable
shall be connected to the spec-
ial earthing device in the const-
ruction.
As falling off the outdoor unit can be
dangerous.
Never cut off or damage power
cables and control wires. If the
power cable and signal control
wire were damaged, change
them by professional.
5
★ ★
★ ★
★
★
★ ★
★ ★
★
★

Warning
The temperature of refrigerant circuit will be high, please keep the interconnection cable away from the copper
tube.
Be sure to cut off the power supply before cleaning the air conditioner; otherwise electric shock might happen.
Wetting of air conditioner may cause the risk of electric shock. Make sure not to wash your air conditioner in
any case.
Volatile liquids such as thinner or gasoline will cause damage to the appearance of air conditioner. (Only use
a damp cloth to clean the air conditioner cabinet).
Do not dispose this product as unsorted municipal waste. Collection of such waste separately for special
treatment is necessary.
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly
qualified person in order to avoid a hazard.
OUTDOOR UNIT
No. Description
1 Air outlet grille
2Valve
Warning
Be sure to cut off the power supply before cleaning the air conditioner; otherwise electric
shock might happen.
Wetting of air conditioner may cause the risk of electric shock. Make sure not to wash
your air conditioner in any case.
This product must not be disposed together with the domestic waste.
This product has to be disposed at an authorized place for recycling of electrical and
electronic appliances.
Volatile liquids such as thinner or gasoline will cause damage to the appearance of air
conditioner. (Only use a damp cloth to clean the air conditioner cabinet).
The temperature of refrigerant circuit will be high,please keep the interconnection cable
away from the copper tube.
Note: The above figures are only intended to a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to
the appearance of the units that have been purchased.
No. Description
1 Air outlet grille
2Valve
OUTDOOR UNIT
NAME OF PARTS GENERAL INFORMATION
6
1
1
2
2
MUEX-18-H3.2
MUEX-24-H3.3
MUEX-28-H3.4
MUEX-14-H3.2

OUTDOOR UNIT
No. Description
1 Air outlet grille
2Valve
Warning
Be sure to cut off the power supply before cleaning the air conditioner; otherwise electric
shock might happen.
Wetting of air conditioner may cause the risk of electric shock. Make sure not to wash
your air conditioner in any case.
This product must not be disposed together with the domestic waste.
This product has to be disposed at an authorized place for recycling of electrical and
electronic appliances.
Volatile liquids such as thinner or gasoline will cause damage to the appearance of air
The temperature of refrigerant circuit will be high, please keep the interconnection cable
away from the copper tube.
Note: The above figures are only intended to a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
NAME OF PARTS GENERAL INFORMATION
7
MUEX-42-H3.5
2
1
OUTDOOR UNIT WORKING TEMPERATURE RANGE GENERAL INFORMATION
Indoor side DB/WB(℃)Outdoor side DB/WB(℃)
Maximum cooling 32/23 43/26
Maximum heating 27/-
24/18
● The operating temperature range (outdoor temperature) is
-15℃~24℃
conditioner. (Only use a damp cloth to clean the air conditioner cabinet).

P
L
H
Minimum power cord section
mm
mm
mm
L
P
H
Fuse or air switch
890
362
700
MODEL
20
2.5
Electricity supply
Electrical data 220-240V~,50Hz
mm
2
Size and clearance
P
L
H
Minimum power cord section
mm
mm
mm
L
P
H
Fuse or air switch
920
380
790
MODEL
220-240V~,50Hz
mm
2
25
2.5
Electrical data
Electricity supply
Size and clearance
TECHNICAL DATA GENERAL INFORMATION
8
MUEX-18-H3.2
MUEX-24-H3.3 MUEX-28-H3.4
P
L
H
Minimum power cord section
mm
mm
mm
L
P
H
Fuse or air switch
1015
362
1103
MODEL
220-240V~,50Hz
mm
2
32
4
Electrical data
Electricity supply
Size and clearance
MUEX-42-H3.5
P
L
H
Minimum power cord section
mm
mm
mm
L
P
H
Fuse or air switch
899
378
596
MODEL
10
1.5
Electricity supply
Electrical data 220-240V~,50Hz
mm
2
Size and clearance
MUEX-14-H3.2

DIMENS IONS GENERAL INFORMATION
MUEX-14-H3.2
MUEX-18-H3.2
9
Unit:mm
Unit:mm

DIMENS IONS GENERAL INFORMATION
10
MUEX-24-H3.3
MUEX-28-H3.4
8QLWPP
MUEX-42-H3.5
Unit:mm

ELECTRICAL CONNECTIONS INSTALLER
2. Remove the cable clamp, connect the power connection
cable with the terminal at the row of connection and fix
the connection. The fitting line distributing must be
consistent with the indoor unit.
Wiring should meet that of indoor unit.
3. Fix power connection wire by wire clamp.
4. Ensure wire has been fixed well.
5. Install the handle.
1. Remove the handle at the right side plate of the outdoor
unit (one screw).
The connection pipes and the connectiong wirings
of the unit A and unit B must be corresponding to
each other respectively.
Note: the above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
The appliance shall be installed in accordance with
national wiring regulations.
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
MUEX-14-H3.2
L
N
To the power supply
To unit B
Power cord
To unit A
connecting
cable
L
L
connecting
cable
Handle
Wrong wire connection may cause malfunction of
some electric components. After fixing cable, ensure
that leads between connection point have some
space.
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
11
10A
20A
Air switch capacityM odel
MUEX-18-H3.2
MUEX-14-H3.2
To the power supply
MUEX-18-H3.2

ELECTRICAL CONNECTIONS INSTALLER
12
2. Remove the cable clamp, connect the power
connection cable with the terminal at the row of
connection and fix the connection. The fitting line
distributing must be consistent with the indoor
unit. Wiring should meet that of indoor unit.
3. Fix power connection wire by wire clamp.
4. Ensure wire has been fixed well.
5. Install the handle.
1. Remove the handle at the right side plate of the
outdoor unit (one screw).
Wrong wire connection may cause malfunction of
some electric components.After fixing cable, ensure
that leads between connection to fixed point have
some space.
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
The connection pipes and the connectiong wirings
of the unit A ,unit B and unit C must be correspo-
nding to each other respectively.
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
The appliance shall be installed in accordance with
national wiring regulations.
To the power supply
To unit B
Handle
To unit A
connecting
cable connecting
cable
To unit C
Outdoor unit
Indoor unit
L
connecting
cable
Power cord
L
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
25A
Air switch capacity
MUEX-24-H3.3
MUEX-24-H3.3
To the power supply
M odel

ELECTRICAL CONNECTIONS INSTALLER
13
3. Fix power connection wire by wire clamp.
1. Remove the handle at the right side plate of the
outdoor unit (one screw).
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
Wrong wire connection may cause malfunction of
some electric components.After fixing cable, ensure
that leads between connection to fixed point have
some space.
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
The connection pipes and the connectiong wirings
ofthe unit A, unit B, unit C and unit D must be
corresponding to each other respectively.
The appliance shall be installed in accordance with
national wiring regulations.
Handle
To the power supply
To unit B
To unit A
connecting
cable
To unit C
To unit D
Outdoor unit
Indoor unit
L
connecting
cable connecting
cable connecting
cable
Power cord
L
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
25A
Air switch capacity
MUEX-28-H3.4
MUEX-28-H3.4
To the power supply
M odel
2. Remove the cable clamp, connect the power
connection cable with the terminal at the row of
connection and fix the connection. The fitting line
distributing must be consistent with the indoor
unit. Wiring should meet that of indoor unit.
4. Ensure wire has been fixed well.
5. Install the handle.

ELECTRICAL CONNECTIONS INSTALLER
14
1. Remove the handle at the right side plate of the
outdoor unit (one screw).
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
32A
Air switch capacity
MUEX-42-H3.5
MUEX-42-H3.5
Handle
To the power supply
To unit B
To unit A
connecting
cable
To unit C
To unit D
Outdoor unit
Indoor unit
L
connecting
cable connecting
cable connecting
cable
Power cord
L
To unit E
connecting
cable
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
Wrong wire connection may cause malfunction of
some electric components.After fixing cable, ensure
that leads between connection to fixed point have
some space.
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
The connection pipes and the connectiong wirings
ofthe unit A, unit B, unit C , unit D and unit E must
be corresponding to each other respectively.
The appliance shall be installed in accordance with
national wiring regulations.
DE
C
B
A
DE
CB
A
To the power supply
M odel
2. Remove the cable clamp, connect the power
connection cable with the terminal at the row of
connection and fix the connection. The fitting line
distributing must be consistent with the indoor
unit. Wiring should meet that of indoor unit.
4. Ensure wire has been fixed well.
5. Install the handle.

INSTALLER
Install the drain fitting and the drain hose
Condensation is produced and flows from the out-
door unit when the appliance is operating in the
heating mode. In order not to disturb neighbours
and to respect the environment,install a drain fitting
and a drain hose to channel the condensate water.
Install the drain fitting and rubber washer on the
outdoor unit chassis and connect a drain hose to it
as shown in the figure.
Allowable Length Refrigerant Pipe
Total Length(m) 80 L1+L2+L3+ L4+ L5
Max. Length for Single Unit(m) 25 LX
Max.
installation
altitude
Outdoor unit and
indoor unit 15 H1
Indoor unit and
indoor unit 7.5 H2
b
a
e
d
c
L4L3L2 L5L1
Outdoorunit
Height difference between indoor unit and outdoor unit H1
Height difference between indoor units H2
Indoor unit
Indoor unit
Equivalent length of the farthest fitting pipe Lx
15
Capacity Level of the Indoor Unit Gas Pipe Liquid Pipe
09,12 9.52 (3/8") 6.35 (1/4")
18 12.7 (1/2") 6.35 (1/4")
21,24 15.9 (5/8") 9.52 (3/8")
Pipe dimensions
Do not install the outdoor unit in pits or air vents
Installing the pipes
Use suitable connecting pipes and equipment for
the refrigerant R410A.
Wrap all the refrigerant pipes and joints.
Tighten the connections using two wrenches wor-
king in opposite directions.
Location
Caution: Installation Must be Performed in Accordance
with the NEC/CEC by Authorized Personnel Only.
●
The refrigerant pipes must not exceed the maximum
Use bolts to secure the unit to a flat, solid floor.
When mounting the unit on a wall or the roof, make
sure the support is firmly secured so that it cannot
move in the event of intense vibrations or a strong
wind.
Models(m) 18Kx214Kx2 28Kx4
Max. connection pipe length 20 70
Max. connection pipe length
(Simple one indoor unit) 10
20
10 20
24Kx3
60
20
be among 50%-150% of that of the outdoor unit.
heights 5m(14K & 18K), 10m(24K& 28K) or 15m (42K).
42Kx5
80
25
PIPING BETWEEN THE INDOOR AND OUTDOOR UNITS
Dimension of the refrigerant pipe of the indoor unit (only for 42K)
The sum of the capacity codes of the indoor unit should

BLEEDING INSTALLER
Vacuum pump
Humid air left inside the refrigerant circuit can cause com-
pressor malfunction. After having connected the indoor
and outdoor units, bleed the air and humidity from the
refrigerant circuit using a vacuum pump.
(1) Unscrew and remove the caps from the 2-way and 3-
way valves.
(2) Unscrew and remove the cap from the service valve.
(3) Connect the vacuum pump hose to the service valve.
(4) Operate the vacuum pump for 10-15 minutes until an
absolute vacuum of 10 mm Hg has been reached.
(5) With the vacuum pump still in operation, close the
low-pressure knob on the vacuum pump coupling.
Stop the vacuum pump.
(6) Open the 2-way valve by 1/4 turn and then close it
after 10 seconds. Check all the joints for leaks using
liquid soap or an electronic leak device.
(7) Turn the body of the 2-way and 3-way valves. Discon-
nect the vacuum pump hose.
(8) Replace and tighten all the caps on the valves.
Vacuum pump Vacuum pump
Twisting moment (N.m)
35-40
45-50
70-75
Φ12
Φ19
Diameter (mm)
Φ9.52
15-20Φ6
INDOOR
UNIT
Connect to the
indoor unit
Refrigerant fluid direction of fiow
3-way valve
2-way valve
inlet
(2)Turn
(8) Secure
(7)Turn to open fully
(2)Turn
(8) Secure
(6) Openby 1/4 turn
(7)Turn to open fully
(2)Turn
(8) Secure
Valve cap
Valve cap
Service
ADDITIONAL REFRIGERANT CHARGE INSTALLER
Model Total Liquid Pipe Length (a+b+c+d+e)
≤20m
≤30m
≤40m
Additional Refrigerant Charge=∑Extra Liquid Pipe Length×22g/m
Note: if the total refrigerant pipe length is larger than that listed in the table above, the additional refrigerant for the extra
length of the pipe needs to be charged as per 22g/m.
If the total refrigerant pipe length (liquid pipe) is smaller than that listed in the table below, no additional refrigerant
will be charged.
≤50m
MUEX-18-H3.2
MUEX-24-H3.3
MUEX-28-H3.4
MUEX-42-H3.5
16
60-65Φ16
MUEX-14-H3.2

Use suitable instruments for the refrigerant R410A.
Do not use mineral oils to clean the unit.
Ensure that the recommende espace is left around the appliance.
The installation must be done by trained and qualified service personnel with reliability according to this
manual.
Contact service center before installation to avoid the malfunction due to unprofessional installation.
When picking up and moving the units, you must be guidedby trained and qualified person.
Do not use any other refrigerant than R410A.
●
MAINTENANCE INSTALLER
INSTALLATION DIMENSION DIAGRAM INSTALLER
Models 14K to 28K:
> 300
> 500
17
Model 42K:

CHECK AFTER INSTALLATION INSTALLER
18
Check Items
Is the installation reliable?
Has the gas leakage been checked?
Is the thermal insulation of the unit
sufficient?
Is the drainage smooth?
Does the power supply voltage accord
with the rated voltage specified on the
nameplate?
Are the lines and pipelines correctly
installed?
Are the models of lines in conformity
with requirements?
Are there any obstacles near the air
inlet and outlet of the indoor and out-
door units?
Have the length of refrigerating pipe
and refrigerant charge amount been
recorded?
Has the unit been safely grounded?
Problems Owing to Improper Installation
The unit may drop, vibrate or make noises
May cause unsatisfactory cooling (heating)
effect
May cause condensation and water dropping
May cause condensation and water dropping
The unit may bread down or the components
may be burned out
The unit may bread down or the components
may be burned out
The unit may bread down or the components
may be burned out
The unit may bread down or the components
may be burned out
It is not easy to decide the charge amount
of refrigerant.
Risk of electrical leakage
Note:
If the air conditioner still runs abnormally after the above check and handling, please contact
the maintenance serviceman at the local appointed service center and also give a description of the
error occurred as well as the model of the unit.

INSTALLER
19
TROUBLESHOOTING
1. Requirement of malfunction display
When several malfunctions happen at the same time, malfunction codes will be displayed circularly.
2. Malfunction display method
(1) Hardware malfunction: it will be displayed immediately, please refer to “Malfunction status sheet”;
(2) Operation status: it will be displayed immediately, please refer to “Malfunction status sheet”;
(3) Other malfunction: It will be displayed after the compressor has been stopped for 200s, please refer to “Malfunction
status sheet”.
(Note: when the compressor starts up again, malfunction display waiting time (200s) will be cleared.)
3. Malfunction display control
Indoor unit displays malfunction code as shown in the sheet below. ODU communication light will be off for 1s and then blink
for 1s circularly.
4. Viewing malfunction code through remote controller
Enter viewing malfunction code: pressing light button for 6 times within 3S to view malfunction code;
Exit viewing malfunction code: pressing light button for 6 times within 3S or after the malfunction code is displayed for 5min.
For models: MUEX-14-H3.2
Code Description Error Type
U8 Zero cross detection circuit malfunction Outdoor hardware
C5 Malfunction protection of jumper cap Outdoor hardware
H6 Feedback of without IDU motor Indoor hardware
F1 Indoor ambient temperature sensor is open/short circuited Indoor hardware
F2 Indoor evaporator temperature sensor is open/short circuited Indoor hardware
b5 Liquid valve temperature sensor is open/short circuited Outdoor hardware
b7 Gas valve temperature sensor is open/short circuited Outdoor hardware
P7 Modular temperature sensor is open/short circuited Outdoor hardware
F4 Outdoor ambient temperature sensor is open/short circuited Outdoor hardware
A5 Outdoor condenser inlet pipe temperature sensor is open/short circuited (commercial) Outdoor hardware
F4 Outdoor condenser middle pipe temperature sensor is open/short circuited Outdoor hardware
A7 Outdoor condenser outlet pipe temperature sensor is open/short circuited (commercial) Outdoor hardware
F5 Outdoor discharge pipe temperature sensor is open/short circuited Outdoor hardware
E6 Communication malfunction System Error
U1 Malfunction of phase current detection circuit for compressor Outdoor hardware
HE Compressor demagnetization protection Outdoor hardware
U3 Malfunction of voltage dropping dor DC bus - bar Outdoor hardware
Outdoor hardware
F0 Refrigerant lacking or blockage protection of systen (not avalaible for residential ODU) System Error
PU Charging malfunction of capacitor Outdoor hardware
E1 High pressure protection of system System Error
E3 Low pressure protection of system (reserved) System Error
H3 Compressor overload protection Outdoor hardware
MUEX-18-H3.2
MUEX-24-H3.3
MUEX-28-H3.4
P8 Module high temperature protection