Mitsubishi Electric EF-20UYS-UL Service manual

Pressurized ventilators (for device cooling)
1510876HC8902
Model Blade diameter (cm) Indoor or outdoor
20
25
30
Indoor
EF-20UYS-UL
EF-25UAS-UL
EF-30UBS-UL
Installation/Instruction Manual
Be sure to read this manual before starting installation work
to ensure correct and safe installation. Dealers and electrical
contractors shall perform installation in accordance with the
standards of each country.
Notify the customers to observe Safety Precautions which
describe important safety instructions.
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Check the type of power supply before performing the
installation work.
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Blades cannot be replaced and wire connections cannot be
changed.
Please read this manual
carefully before use for proper
and safe use.
After reading, store the manual
in a handy location for easy
access.
For customers For contractors
Contents
Explanation of installation work (For contractors)
1. Safety Precautions ………………………………… 2
2. Usage and Usage Environment …………………… 3
3. Precautions before Installation …………………… 3
4. Name of the Parts …………………………………… 4
5. Outside Dimensions ………………………………… 5
6. Installation Procedure ……………………………… 6
7. Electrical Work ……………………………………… 7
8. Check after installation………………………………7
7ULDO2SHUDWLRQ ……………………………………… 7
Handling Explanation (For customers)
1. Safety Precautions ……………… 8
2. How to Use the Fan ……………… 9
3. Cleaning……………………………9
4. Maintenance and Inspection……10
5. Before Requesting Repair………11
$IWHU6DOHV6HUYLFH …………… 12
7. Specifications …………………… 12
After completing installation, be sure to give this manual to the customer.

2
Explanation of installation work
Do not install the fan in a place
where explosive dust or gas is
generated or could be generated.
- Failure to heed this warning may
result in explosion or fire.
Incorrect handling could result in death or serious
injury
WARNING
When using the fan to exhaust air from
a room where a combustion appliance
for exhausting air through a chimney is
installed, install an air supply opening
large enough to prevent flowing of
exhaust air back into the room.
- Failure to heed this warning may
result in carbon monoxide poisoning.
Install the fan in such a way that a
wood structure covered with metal
lath, wire lath, or metal sheeting and
the metal body part do not directly
contact each other.
- It could cause fire when electrical
leakage occurs.
Be sure to install the electric
leakage breaker.
- Electric leakage may cause electric shock.
Be sure to turn off the distribution
panel circuit breaker before proceeding
with maintenance and inspection.
- Failure to heed this warning may
result in electric shock or injury.
Follow
instructions
Follow
instructions
Follow
instructions
1. Safety Precautions
Do not install the fan in a location
with high humidity such as a
bathroom (relative humidity 90% or
higher).
- Failure to heed this warning may
result in electric shock or fire.
Securely install the fan on a solid,
vibration-free location.
- Injury may result if the fan should fall.
Incorrect handling could result in injury or property damage
to buildings and machinery
Do not install the fan in a place where
it could be exposed to flame directly.
- Failure to heed this warning may
result in fire.
Securely install blades and parts.
- Injury could result if parts fall.
Electrical contractors shall perform
electrical work and grounding work.
- Electrical work by a person other than
a qualified electrician could result in
electric shock or fire.
Do not install the fan in a place
where there is a possibility of snow
accumulation or avalanche.
- Injury could result if parts are
damaged or fall.
Electrical work must be performed
according to the standards of each
country. Never perform connection
by hand-twisting wires.
Furthermore, power lines must be
connected inside a box and box
cover for rigid metal conduit.
-
Connection failure and faulty wiring work
could result in electric shock or fire.
Wear gloves before proceeding with
unpacking, installation, maintenance/
inspection and cleaning.
- Failure to heed this warning may
result in injury caused by, for
example, the edge of the plate.
CAUTION
Prohibited
Cannot be
installed in
a bathroom
The type and degree of danger resulting from incorrect handling are denoted by the following symbols.
For contractors
Be sure to install the ground wire.
- Device failure and electric leakage
may cause electric shock.
Do not use the fan for purposes other
than ventilation and blowing air.
- Failure to heed this warning may
result in fire, electric shock or injury.
Do not use the fan at other than the
rated voltage and frequency.
- Failure to heed this warning may
result in fire or electric shock.
Check
grounding
Since this product is designed to be
installed at a higher location, install
the product at least 2.3 m above the
floor.
- Failure to heed this warning may
result in injury.
Follow
instructions
Prohibited

3
2. Usage and Usage Environment
Environment and restriction condition
Protection Rating IPXX
Class of protection Class Ⅰ
Over voltage category Class Ⅱ
Pollution degree Class Ⅱ
Permissible Temp. in use - 15°C to 50°C (The unit must not be frozen.)
Permissible Humidity in use 90% at 20°C
Permissible Altitude in use 1000 m or less
Installation condition +LJKSODFHLQVWDOODWLRQPRUKLJKHUIURPWKHÀRRU
Indoor installation
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3. Precautions before Installation
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4
4. Name of the Parts
Blade
Motor
Motor shaft
Main unit
Tab washer
Special nut

5
5. Outside Dimensions
Rotation
Power cable effective length 1 m
Vinyl cab tire cable
3-core AWG18
Ground wire
Capacitor
box
4×φ10 Mounting hole
Air flow
Mounting
direction
*When the motor shaft is placed horizontally, install the fan so that
the mounting-direction arrow is placed up.
Model
Unit (mm)
99
10 10
ij
φ
φ
φ
EF-20UYS-UL
EF-25UAS-UL
EF-30UBS-UL
ABCDEF
320
370
420
280
330
380
260
305
340
228
271
306
220
265
300
105
115
125
A
D
F
B
B A
C
D
E

6
6. Installation Procedure
Wear gloves when unpacking or installing.
-
Failure to heed this warning may result in injury
caused by, for example, the edge of the plate.
Securely install the fan on a solid,
vibration-free place.
- Injury may result if the fan should fall.
CAUTION
Since this fan is designed to be installed
in a higher location, install the fan at least
2.3 m above the floor.
- Failure to heed this warning may result in
injury.
WARNING
When unclean air is discharged, a place where fresh air enters is required.
Install an air intake port, which has a size equivalent to or larger than the mounting frame of the
fan, at the opposite side to the fan installed side of the room.
1. Provide an opening and mount
the mounting bolts in the
locations indicated on the figure
on the left.
2. Mount the fan.
Put the mounting bolts through the
mounting holes and then use
washers and nuts to secure them
properly.
Note:
- Do not use the knock out holes for
product mounting. (Product
vibration, drop/deformation cause)
- Check that the blade does not
contact the structure around the
main unit.
- Install the fan on a flat surface to
avoid deforming the fan.
AB
20 cm
25 cm
30 cm
290
340
390
280
330
380
C
240
290
340
M8
M8
M8
30
B
B
ƑA
C
C
Type Mounting bolt diameter
Unit (mm)
Opening
Mounting bolt
Fan
Mounting hole
Washer
(commercially available
M8 x 4)
Nut
(commercially available
M8 x 4)
Mounting bolt

7
7. Electrical Work
Electrical work must be performed according to
the standards of each country. Never perform
connection by hand-twisting wires. Furthermore,
power lines must be connected inside a box and
box cover for rigid metal conduit.
- Connection failure and faulty wiring work could
result in electric shock or fire.
CAUTION
Do not use the fan at other than the
rated voltage and frequency.
- Failure to heed this warning may result
in fire or electric shock.
Be sure to install the ground wire.
- Device failure and electric leakage
may cause electric shock.
WARNING
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Black
Motor
Black
Black
Black
Black
Black
Black
Red
White
Black
Ground screw
Green/Yellow (ground wire)
Capacitor Box
Capacitor
Cord
Power Supply
50/60 Hz
100 V AC
Power supply is 100 V AC (single-phase). Perform connection after checking that the power supply
is correct. If the fan is operated with the wrong power supply, the motor could burn out.
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To protect against overload on the motor, use overload protection equipment that employs a
magnetic switch (magnetic contact + thermal relay). Overload protection equipment must be
attached for every unit. The setting current value of the magnetic switch is taken 1.2 times
maximum load current given in Page 12 "Specifications" as reference.
9. Trial Operation
After installation work, check the
following items.
1. Is the fan installed correctly?
2. Is not the power cord damaged?
3.
Has grounding work been performed correctly?
4. Is the power supply voltage correct?
Turn ON the breaker to perform trial operation.
5. Is not there abnormal vibration or noise?
8. Check after installation
When completing installation, check the fan according to Section 6 and 7.
Be sure to correct any problems that are found. (Failure to correct the problems may result in poor
performance, and furthermore safety cannot be ensured.)

8
Do not use the fan in such a way that it
is started and stopped more than 50
times a day.
-
Injury could result if parts are damaged or fall.
When the blades are stained badly,
make sure to clean them.
- Injury could result if parts are damaged or
fall due to vibration.
Be sure to wear gloves during cleaning,
maintenance and inspection.
-
Failure to heed this warning may result in injury
caused by, for example, the edge of the plate.
Incorrect handling
could result in death
or serious injury
Incorrect handling could result
in injury or property damage to
buildings and machinery
Do not use the fan when it is subject to
abnormal vibration.
-
Injury may result if the fan or parts should fall.
If the fan will not be operated for a long
time, be sure to turn off the circuit
breaker on the power distribution panel.
- Failure to heed this warning may result in
electric shock due to deteriorated
insulation or fire due to electric leakage.
Refrain from immersing in water
or splashing the product with
water.
- Failure to heed this warning could
result in short circuit, electric
shock or fire.
Never make modification under
any circumstances.
Only qualified personnel can
perform disassembly and repair.
-
Failure to heed this warning may
result in fire, electric shock or
injury.
For repair, contact the dealer from
whom you purchased the fan.
Do not insert fingers or objects
into the fan during operation as
doing so is dangerous.
- Failure to heed this warning may
result in injury.
Never touch the fan when it is
stopped with the power on,
when there is an abnormality
(for example, if you smell
burning), or when there is a
power outage.
- It may start suddenly, resulting in
injury or electric shock.
Turn off the distribution board
circuit breaker before
proceeding with cleaning,
maintenance, and inspection.
- Failure to heed this warning may
result in electric shock or injury.
Do not operate with wet hands.
- Failure to heed this warning may
result in electric shock or injury.
WARNING CAUTION
Prohibited
No
disassembly
Follow
instructions
Follow
instructions
No wet
hands
No water
exposure
Handling Explanation
1. Safety Precautions
Touching
prohibited
The type and degree of danger resulting from incorrect handling are denoted by the following symbols.
For customers
Installation work is carried out in accordance
with the regulations of each country. After
completing installation, check Trial Operation.

9
3. Cleaning
Cleaning of blades, etc.
Overall cleaning
Cleaning should be performed about every three months.
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Note:
- Do not use the following solvents when cleaning:
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Wear gloves during cleaning.
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CAUTION
Be sure to turn off the distribution panel
circuit breaker before cleaning.
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WARNING
To operate ...7XUQ21WKHEUHDNHU
To stop ...7XUQ2))WKHEUHDNHU Do not insert fingers or objects into the fan
during operation as doing so is dangerous.
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Do not operate with wet hands.
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WARNING
2. How to Use the Fan

10
Be sure to wear gloves during
maintenance and inspection.
- Failure to heed this warning may result in
injury caused by, for example, the edge of
the plate.
CAUTION
Be sure to turn OFF the distribution panel
circuit breaker before proceeding with
maintenance and inspection.
- Failure to heed this warning may result in
electric shock or injury.
WARNING
When cleaning once every three months, inspect the following items:
Is there rust on the fan itself or
the nuts or bolts used to mount
the product rusted?
Is there rust on the blade fix nuts
or the blades?
Use urethane paint to address partial rusting.
If there is rust on a significant portion of a part,
replace the part. (Injury could result if the fan
falls.)
Use urethane paint to address partial rusting.
If there is rust on a significant portion of a part,
the part must be replaced. Ask your dealer or
an electrical contractor to repair the unit. (Injury
could result if the blades are damaged or the
fan falls.)
Tighten the nuts so that the fan does not
wobble.
(Injury may result if the fan or blades fall.)
The motor needs to be replaced.
Ask your dealer or an electrical contractor to
repair the fan.
The motor needs to be replaced.
Ask your dealeror an electrical contractor to
repair the fan.
The blades need to be replaced.
Ask your dealer or an electrical contractor to
repair the fan. (Injury could result if the blades
are damaged or the fan falls.)
Perform cleaning.
The bearing or motor needs to be replaced.
Ask your dealer or an electrical contractor to
repair the fan.
Note: The service life of the bearing is about
30,000 hours under continuous operation in a
50 ºC environment. (The service life may get
shorter depending on the operating
environment) Inspect and replace if necessary.
Does the motor appear to be
discolored?
Is the power cable damaged?
Are there cracks on the blades?
Is there dust on high temperature
parts such as the motor?
If a filter or insect screen is used,
is it clogged?
Are the nuts used to mount the
fan loose?
Are the blades and motor
properly secured?
Rust
Wobbling
Damage
Dust
Is there abnormal noise while the
fan is turning?
Abnormal
noise
Inspection contentItem Action
4. Maintenance and Inspection

11
After the fan used for a long time for safety, it is recommended that the fan be
checked even if the fan has no trouble.
If the following phenomenon is found and cannot be corrected after inspection by the customer, turn
off the breaker and ask your dealer or an electrical contractor to inspect and repair the fan. Please
ask your dealer or an electrical contractor about the cost of repairs.
Note:
The fan has a built-in thermal fuse for protection against the damage by a fire.
The above overload protection equipment will activate automatically to stop rotation in the case of
locked operation, overloading, application of incorrect voltage, or an ambient temperature in excess
of the rated level. If this should occur, turn OFF the power and eliminate the cause of the problem.
*If the thermal fuse is blown, the motor must be changed. Switch OFF the power and ask a
qualified electrical contractor to change the motor.
5. Before Requesting Repair
Phenomenon Cause/Action
The breaker is OFF.The fan does not
start even though
the power is ON.
The blades are loose.
The main unit is loose.
There are abnormal sounds
from the bearing.
Rust has occurred over a
wide range.
There is abnormal
sound or vibration
during operation.
Something is caught on the
blades.
The ambient temperature has
exceeded 50 ºC.
There is corrosion inside the
motor.
Turn ON the breaker.
Tighten Special nut.
Tighten main unit fix nuts.
Change the bearing.
Ask your dealer or an electrical contractor
to repair the fan.
Replace rusted parts.
Ask your dealer or an electrical contractor
to repair the fan.
Remove the caught object.
The fan cannot be used in a location where
the ambient temperature exceeds 50 ºC.
Lower the ambient temperature or use
another model.
Change the motor.
Ask your dealer or an electrical contractor
to repair the fan.
There is a burnt
smell.

12
Model
%ODGH
diameter
(cm)
Frequency
(Hz)
Air
volume
(m3/h)
Noise
G%
Current
(A)
Power
consumption
(W)
Starting
current
(A)
Maximum
load current
(A)
Weight
(kg)
EF-20UYS-UL 20 50 730 38.5 0.37 36 0.76 0.39 2.5
60 850 43 0.44 44 0.75 0.48
EF-25UAS-UL 25 50 1230 41.5 0.45 43 1.18 0.57 3.6
60 1430 46 0.56 56 1.08 0.70
()8%68/ 30 50 1920 46.5 0.81 75 2.26 1.00 4.9
60 2220 50.5 0.94 94 2.08 1.23
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For after-sales service, ask the sales agent from whom you purchased the product.
To change the motor, contact your dealer and tell the fan model name to request repair.
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We will retain the functional repair parts for nine years after terminating production of the product.
The functional repair part means a part which is necessary to maintain the function of the product.
6. After-Sales Service
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