mundoclima MUCS-W7 User manual

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www.mundoclima.com
Cassette 4 Ways Compact FCU DC
Service manual
English
CL04415 to CL04416
MUCS-W7

Compact Four-way Cassette Type DC FCU
1
Compact 4-way cassette FCU
1. External Appearance.......................................................................................................... 2
2. Features .............................................................................................................................. 2
3. Product lineup .................................................................................................................... 3
4. Accessories ........................................................................................................................ 3
5. Specifications..................................................................................................................... 5
6. Dimension........................................................................................................................... 6
7. Wiring Diagrams................................................................................................................. 7
8. Troubleshooting ................................................................................................................. 8
9. Installation .......................................................................................................................... 9

Compact Four-way Cassette Type DC FCU
2
1. External Appearance
2. Features
Capacity range: 300CFM to 500CFM
Compact design, simple installation and easy maintenance
Round blow air supply enables uniform air flow distribution
Comfortable horizontal air discharge reduces draughts and ceiling soiling
Unique design of the centrifugal fan ensures extra-quiet operation and high efficiency
Wireless remote control with LED display, wired control is optional
Built-in drain water pump with 500mm pumping head
Optional extended drainage pan for protecting your ceiling better
Four speed motor with one reserved for more choice
Fresh air provision makes life healthier and more comfortable
Excellent efficiency
Mundoclima DC FCU adopt the brushless DC motor, the DC motor efficiency is up to 90%. In contrast
with the original FCU.DC FCU power consumption can be reduced by more than 30%.
DC and AC motors power contrast
Power Inpu t：W
Air Flow：CFM
200
0
50
100
150
200
300 400 500 600 800 1000 1200
DC moto r
AC moto r

Compact Four-way Cassette Type DC FCU
3
DC brushless motor
The motor adopts fully enclosed structure design, it is energy-saving , of high operating efficiency and
durable motor. The motor bearing can operate 80,000 hours continuously, and easy for maintenance.
Low noise
Advanced 3-D spiral fan design reduces air resistance and operating sound. The motor bearing
with unique design makes less operation vibration.
3. Product lineup
Type
14
16
Compact 4-way cassette (MUCS-W7)
●
●
4. Accessories
Standard accessories
Accessory name
Qty.
Shape
Usage
Owner’s & installation manual
1
/
Installation guide
Installation paper board
1
Tubing& Fittings
2
Soundproof/ insulation sheath
Drainpipe Fittings
1
Out-let pipe
1
Out-let pipe clasp
5
Tightening band
Remote controller& Its Frame
1
Remote controller
R05/BGE-20
1
Frame
2
Mounting screw(ST2.9x10-C-H)
2
Alkaline dry batteries
Remote controller manual
1
2

Compact Four-way Cassette Type DC FCU
4
Optional accessories
Accessory name
Qty.
Shape
Usage
Wired controller
KJR-29B
1
Wired control
Wired controller
KJR-12B/D
1
Wired control
Central controller
CCM03
1
Central control
3-way valve
1
(CL92869)
(CL92871)
(CL92905)
Central control
Central controller
CCM30
(CL92911)
(CO05506 + CO05509)
3-way valve

Compact Four-way Cassette Type DC FCU
5
5. Specifications
Model
Air flow
H/M/L
m3/h
717/502/359
785/550/393
H/M/L
CFM
422/296/211
462/324/231
Cooling
Capacity
H/M/L
kW
3.93/3.07/2.48
4.24/3.31/2.67
Water flow rate
H
l/h
676
729
Water pressure drop
H/M/L
kPa
12.0
9.4
Heating 50℃
Capacity
H/M/L
kW
5.34/4/3.15
5.77/4.33/3.4
Water pressure drop
H
kPa
10.6
9.4
Heating 70℃
Capacity
H/M/L
8.34/6.26/5.16
9/6.76/5.56
Water pressure drop
H
kPa
11.9
10.5
Power supply
V/Ph/Hz
220-240/1/50
Power input
H
W
27
32
Sound pressure level
H/M/L dB(A)
44.8/36.2/28.8
46.6/37.9/30.3
Fan motor
Type
DC motor
Quantity
1
Brand
Panasonic
Panasonic
Model
WZDK37-38G
WZDK37-38G
Fan
Type
Centrifugal, forward-curved Blades
Quantity
1
Coil
Row
2
Max. Working pressure
MPa 1.6
Coil length x height
mm
1315 x210
Fin spacing
mm
1.3
Fin type
Hydrophilic aluminium
Number of circuits
6
7
Diameter
mm
Φ7
Panel
Dimensions
W×H×D
mm
647×50×647
Packing
W×H×D
mm
715×123×715
Net weight
kg
2.5
Gross weight
kg
4.5
Body
Dimensions
W×H×D
mm
575×261×575
Packing
W×H×D
mm
655×290×655
Net weight
kg
16.5
Gross weight
kg
21.5
Pipe connection
Water inlet/outlet pipe
Inch
G3/4
Drain pipe
mm
ODΦ25
Note:
1. The data is the performance in high speed with relevant static pressure.
2. Cooling Conditions: Entering Water 7°C, Temperature Rise 5°C, Entering Air Temperature 27°C DB,19°CWB.
Heating Conditions: Entering Water 50°C, enter air temperature 20°C, the same water flow as the cooling conditions.
Entering water 70°C, enter air temperature 20°C,△T water 10°C .
3. Noise is tested in full-anechoic test room.
MUCS-14-W7 MUCS-16-W7

Compact Four-way Cassette Type DC FCU
6
6. Dimension
H(mm)
50

Compact Four-way Cassette Type DC FCU
7
7. Wiring Diagrams
MUCS-14-W7
MUCS-16-W7
(Reserved)

Compact Four-way Cassette Type DC FCU
8
8. Troubleshooting
Troubles and causes of air conditioner
If one of the following malfunctions occur, stop operation, shut off the power, and contact with your dealer.
The operation lamp is flashing rapidly (five times per second),
you disconnect the unit with the power and then connect the unit with the power again after two or three
minutes but the lamps still flash.
Switch operations are erratic.
The fuse is blown frequently or the circuit breaker is tripped frequently.
Foreign matter or water has fallen inside the air conditioner.
Water leaks from the indoor unit.
Other malfunctions.
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.
Solution
Clean the heat exchanger.
Clean the air filter.
Eliminate all dirties and make air
smooth.
Close doors and windows.
Make curtains in order to shelter from
sunshine.
Reduce heat source.
AC cooling capacity reduces (normal).
Check leakage .
Symptoms Causes
Unit does not start
Airflowingnormallybut
completely can't cooling
Units start or stop frequently
Low cooling effect
Low heating effect
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 setted correctly.

Air or no concreting gas in the watering
circuit.
three-way valve is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Temperature is not setted correctly.
Indoor unit heat exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor units is blocked.
Doors and windows are open
Sunlight directly shine.
Too much heat resource.
Leakage of water .
Wait for the comeback of power.
Switch on the power.
Replace the fuse.
Replace the batteries or check the
controller.
Set the temperature properly.
Vacuum .
Maintenance or change three-way
valve.
Install manostat.
Find reasons and solution.
Use heating device.
Close doors and windows.
Check leakage.
Doors and windows not completely
closed.
Leakage of water.
×
NO. Malfunction Operation Timer Defrost Alarm
1
2
3
4
5
Room temperature sensor
checking channel is abnormal
Evaporator sensor checking
channel is abnormal
EEPROM malfunction
Water-level switch
malfunction
×
× ×
×
×
× ×
×
×
×☆
☆
× ×× ☆
☆
(× Extinguish,☆ Flash at 5Hz）
☆☆
ON/OFF switch
66
Fan failure ☆☆ ××

Compact Four-way Cassette Type DC FCU
9
9. Installation
9.1 Installation space
The indoor unit should be installed in a location that meets the following requirements:
There is enough room for installation and maintenance.
The ceiling is horizontal, and its structure can endure the weight of the indoor unit.
The outlet and the inlet are not impeded, and the influence of external air is the least.
The air flow can reach throughout the room.
The connecting water pipe and drainpipe could be extracted out easily.
There is no direct radiation from heaters.
Caution:
Keep indoor unit, outdoor unit, power supply wiring and transmission wiring at least 1 meter away from
televisions and radios. This is to prevent image interference and noise in those electrical appliances. (Noise
may be generated depending on the conditions under which the electric wave is generated, even if 1 meter
is kept.)
9.2 Install the main body
A. The existing ceiling (to be horizontal)
a. Cut a quadrangular hole of 880×880mm in the ceiling according to the shape of the installation paper
board.
The center of the hole should be at the same position of that of the air conditioner body.
Determine the lengths and outlets of the connecting pipe, drain pipe and cables.
To balance the ceiling and to avoid vibration, please enforce the ceiling when necessary.
b. Select the position of installation hooks according to the hook holes on the installation board.
Drill four holes of Ø12mm, 50~55mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).
Face the concave side of the installation hooks toward the expansible hooks. Determine the length of
the installation hooks from the height of ceiling, and then cut off the unnecessary part.
If the ceiling is extremely high, please determine the length of the installation hook according to facts.
c. Adjust the hexangular nuts on the four installation hooks evenly, to ensure the balance of the body.
If the drainpipe is awry, leakage will be caused by the malfunction of the water-level switch.
Adjust the position to ensure the gaps between the body and the four sides of ceiling are even. The
body's lower part should sink into the ceiling for 10~12 mm.
In general, L is half of the screw length of the installation hook.
Locate the air conditioner firmly by wrenching the nuts after having adjusted the body's position well.