Mitsubishi Electric MJ-E22VX-A1 Service manual

DEHUMIDIFIER
SERVICE MANUAL
Model
2013
No.MJW-E-1207A
MJ-E21BG-S1-IT
Sold from 2013
CONTENTS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Precautions
Names and Functions of Parts
Specifications
Outer Dimensions
Wiring Diagram
Function
Technical Points
Precautions for failure diagnosis
Troubleshooting Procedure
Troubleshooting
Maintenance
Service Checklist
Precautions for Disassembly and Reassembly
Disassembly and Reassembly Hints
Parts Catalog
2
3
5
5
6
8
9
10
11
18
19
21
22
24
32
2
1. Precautions
Note) This page is extracted from the instruction manual.
Note) This page is extracted from the instruction manual.
2. Names and Functions of Parts
3
4
Note) This page is extracted from the instruction manual.
3. Specifications
Note) This page is extracted from the instruction manual.
4. Outer Dimensions
5
5. Wiring Diagram
CM
R
FM
SV
P200
Sensors
(Humidity and room
temperature sensing)
P201
Yellow/Green
Red
Red
Orange
Orange
Blue
Blue
Operation
control board
Yellow
Black
Blue
White
Red
Gray
S
Solenoid valve
C
Blower fan motor
Compressor
1) Wiring Diagram
P5
P2
P3
P100
P101
P10
1℃ (defrost)/12℃ (end)
Blue
Power plug
Brown
P1
Power control board
P11
Gray
Run capacitor
P4
Thermistor (Tube
temperature sensing)
White
White
SM
P20
Stepping motor
Gray
P13
Gray
Float switch
Gray
Safety Devices
(1) Current fuse ....................Overcurrent flow caused by deterioration in electrical parts or other problems
turns the power source to OFF.
<Current setting: 2A>
(2) Motor protector................The compressor stops operating if the room temperature exceeds 35°C.
(Overload relay)
The compressor will also shut down when malfunctions or other problems
cause the current flow to exceed 5.3A.
(3) Control circuitry ...............The room temperature thermister senses temperature below about 0°C, and
shuts down the compressor.
(4) Thermal fuse ...................When blower motor temperature exceeds 133°C due to blower locking or other
malfunctions, blower operation shuts down.
(5) Current fuse for compressor protection
................... If the protection by motor protector and control circuitry is not effective,
the compressor shuts down when the current to it exceeds approximately 10A.
<Setting current: 10A>
6
2) Board Diagram
[Power control board]
[Operation control board]
7
6. Function
■ Function List
Operation mode
Compressor
Blower fan
Solenoid valve
LED indicator
Swing louvre
Power
Intelligent
Lamps
Air Purifier
Full
Drying inside
Humidity (set/current)
Operation mode
HIGH
LCD indicator
Swing area
Swing monitor
Off/on timer
Mildew guard
Defrost
Low temp
Child lock
Power
Selection
Mode
Button
Humidity Selection
Air purfier
Swing louvre
Off/on timer
Drying inside
Child lock
Note
8
: Display lamp/Operable
: Timer - flashes when on
: Off/stopped/inoperable
: Operable only when swing on/lit
: Operable only when swing on and blower fan rotates
: LCD/LED lights at each operation mode
: LCD/LED flashes at each operation mode
: Lights at room temperatures of 14℃ or under
: Varies by conditions.
ON : ON LED lit or flashing
OFF : OFF LED lit
Child lock
On timer
counting
On timer
being set
Off timer on
Defrost
Full
Drying inside
Air purifier
Intelligent Laundry
Easy
dehumidifying
Low Temp
Mildew guard
Low
High
Auto
Operation off
Dehumidifying operation
7. Technical Points
■ Coolant Circuit
φ6.35
Compressor
Coolant flow
Dehumidifying
Defrosting
φ5
φ5
φ6.35
Tube temperature
sensing thermistor
Solenoid
valve
Fan
(closed when
dehumidifying
and open
when
defrosting)
Heat exchanger
(heat radiation)
Blow
Capillary tube
φ5.0×φ4.0
Humidity
sensor
Heat exchanger
(cooling)
φ6.35
Intake
Room
temperature
sensing thermistor
φ6.35
φ6.35
Capillary tube
φ2.0×φ0.8×φ340
■ Performance curve
Note) This page is extracted from the instruction manual.
9
8. Precautions for failure diagnosis
The following precautions should be observed in order to perform troubleshooting safely and correctly.
The following diagrams indicate circumstances where danger can result from mishandling the unit.
WARNING
Mishandling may result in fatal or serious injury, or fire.
CAUTION
Mishandling may result in minor or damage to your home or property ,etc.
Meanings of graphic symbols are explained below.
Always follow the
instructions
Forbidden
Alert
WARNING
Remove the power plug
from the socket.
Unplug
When performing work with
the power on, be careful
not to touch the live part. Electric shock
Failure to do so may cause electric shock or injuries.
This may cause electric shock.
Do not touch a rotating object
until it completely stops.
Do not work with wet hands.
Don’t touch
No wet hands
The rotating object may catch your hand etc,
and result in injuries.
This may cause electric shock.
Check the wiring diagram
before wiring processing.
After the work,
lay the wire out as it was before.
Check
Return to as it was
Failure to do so may cause combustion,
generation of smoke, and/or malfunction.
Failure to do so may cause combustion,
generation of smoke, and/or malfunction.
CAUTION
10
Wear protective gloves.
Keep children away.
Wear gloves
Failure to do so may result in injuries
by the edge of metal, electric shock,
and/or burns caused by contact with hot section.
Keep away
Failure to do so may result in
electric shock and/or injuries when moving
the unit or using a measuring device.
9. Troubleshooting procedure
1) Failure diagnosis flowchart
Are error codes
displayed?
“E0” “E1” “E7” “E8”
“A1” “A2” “A3” “A6” “P4”
NO
Does the power lamp light
by turning the power on?
YES
Refer to “Error Indications and
CorrectiveActions,” and follow
the procedures.
NO
Check the continuity of power cord. NG
Replace the power cord.
OK
OK
YES
Check the current fuse of
power control board (2A/250V).
NG
Replace the power control board.
NG
Check if there is no
disconnection or contact
failure of the connectors
and connector pins of
powercontrol board.
OK
OK
Does the detective buzzer beep
by turning the power on?
NO
Check if the lamps and LCD
of control panel light.
*How to put out all lighting(Press
YES
the mode switch and the humidity
selection switch together 4 times
when the power is off. Turn on
the power within 2 seconds.)
*Check if LED on the operation
control board is down.
(When LED is down, correct it.)
NG
NG
Replace the operation control board.
NG
YES
NO
Is the tank filled with water ?
NO
OK
YES
NG
Check the float.
‡,VWKHIORDWVZLWFKFRPLQJRII
or attached upside-down?
‡Is the float movement smooth?
‡Is a magnet attached to the float?
OK
Check the float switch.
‡Check if there is no disconnection or
OK
Replace the power control board.
OK
Is “Full lamp” lighting?
Insert the connector OK
and connector pins
securely.
NG
Drain water from the tank.
NG
Check the float.
NG
Replace the float switch.
NG
contact failure of the connector (P13) and
connector pins of power control board.
‡Check the continuity between connecter (P13)
terminals when the water tank is equipped.
Normal… Tank full:open
Empty:short
Replace the power control board.
NG
OK
Replace the operation control board.
OK
OK
Does it dehumidify?
NO
Does the blower fan motor rotate? NO
YES
YES
Check if there is no disconnection NG
or contact failure of the connector
(P2) and connector pins of power
control board.
OK
Check the resistance of the NG
blower fan motor.
Normal:Between yelORZDQGEOXHȍ
%HWZHHQEODFNDQGEOXHȍ
Abnormal: Open or short
OK
Insert the connector
and connector pins
securely.
NG
OK
OK
Replace the blower fan motor.
NG
Replace the power control board. OK
NG
Replace the operation control board.
OK
A
B
11
A
B
Does the compressor operate? NO
YES
Is the operating environment YES
low temperature?
(less than 2°C)
NO
Dehumidification may not be OK
possible in low temperature
environments. (The compressor
does not operate by detecting
abnormal low temperature)
NG
Check if there is no disconnection NG
or contact failure of the connector
(P5) and connector pins of power
control board.
Insert the connector OK
and connector pins
securely.
NG
OK
Check the current fuse of NG
motor protector (2A/250V).
Replace the current fuse. OK
NG
OK
Check the continuity of the NG
motor protector.
Nornal:Open
Abnormal:Short
* Check it at room temperature
when the power is off.
Replace the motor protector.
OK
NG
OK
NG
Check the resistance of
the compressor.
Nornal:Terminal C-R 17ȍ
7HUPLQDO&6ȍ
Abnormal:Open or short
Replace the compressor.
OK
NG
OK
Is there an overcurrent?
(The surface of the compressor is hot.)
YES
Replace the compressor.
OK
NG
NO
Replace the power control board. OK
NG
Replace the operation control board.
OK
Is the heat exchanger
(evaporator) cold?
NO
YES
Are the power consumption
and current normal?
NO
YES
NO
Check the resistance of the
tube temperature sensing thermistor.
Nornal:%HWZHHQ3SLQVNȍ
WRNȍ
Abnormal:Open or short
YES
Check the coolant circuit.
NG
(If the coolant leaks.
If the tube clogs.)
ƔThe part of the cooler near
the tube temperature sensor
should be at least 10°C lower
than room temperature when
normal.
ƔThe bottom of the heat
exchanger has frost when the
quantity of coolant is little by
coolant leaking.
Replace the parts that
coolant is leaking or the
tube is clogged.
OK
Replace the tube temperature OK
sensing thermistor
NG
Replace the power control board.
OK
NG
Replace the operation control board.
OK
C
12
D
*Note: Do not replace the compressor easily excpet when the overcurrent(Lock),
the abnormal noise or the abnormal vibration is occured.
(includes the oil leak in the compressor)
C
D
Does the solenoid valve operate? NO
(Shorten J301 and J302)
YES
Check if there is no disconnection NG
or contact failure of the connector
(P3) and connector pins of power
control board.
Insert the connector
and connector pins
securely.
NG
OK
NG
Check the resistance of the
solenoid valve coil.(P3 connector)
Nornal:Between the pin1 and
pin2 2.0kȍ-2.2kȍ
Abnormal:Open or short
Replace the solenoid valve coil. OK
NG
Replace the power control board.
OK
NG
OK
Replace the operation control board.
OK
Are there any clogs or dust on
the filter.
YES
Clean filter.
OK
NG
NO
Is the operating environment
low humidity and low temperature?
YES
It is normal.
Dehumidication may not be
possible in low humidity and OK
low temperature environments.
Explain the performance
curve on P9.
YES
It is normal.
Defrost mode is operating.
Airflow stops in a few minutes.
NO
The unit is normal.
The unit stop working in the
middle of operation.
YES
Is the defrost mode selected?
Does the defrost indicator light?
NO
NO
Is automatic operation
YES
selected?
Easy dehumidifying /
Intelligent laundry /
Mildew guard / Auto / Off timer
Is the operating
YES
environment low humidity
and low temperature?
NO
Dehumidication may
not be possible in low
humidity and low
temperature environments.
Explain the performance
curve on P9.
1) Easy dehumidifying:It stops according to the humidity level.
2) Intelligent laundry:It stops in a minimum of about 60 minutes and a maximum of about
12 hours.
3) Mildew guard:It operates intermittently 2-4 hours (24 hours).The operating time varies
depending on the humidity.
4) Auto:Compressor and blower fan stop when current humidity is -1% of set humidity or less.
5) Off timer:It stops at the set time.
6) All operation mode:Is the off timer operation selected with other operation mode?
Off timer operation has priority over other modes.
1-6 indicate that the unit is operating normally. Explain that to the customer.
Stepping motor (louvre)
does not operate.
NO
YES
Is the swing louvre switch
“OFF”?
YES
NO
Does the swing direction of YES
the louvre change to “Wide”,
“Upward”,or ”Rear”?
The unit is normal.
NO
Check if there is no disconnection or NG
contact failure of the connector (P20) and
connector pins of power control board.
OK
Check the resistance between NG
connector pins of the stepping
motor (P20 connector).
Normal:
Terminal1-2
Terminal1-3
342-418ȍ
Terminal1-4
Terminal1-5
Abnormal:Each interval is
open or short
Insert the connector and
connector pins securely.
OK
Replace the stepping motor.
OK
NG
Replace the power control board.
OK
NG
Replace the operation control board.
OK
OK
E
13
E
Only a small quantity of
water is dehumidified.
NO
YES
Is the operating environment YES
low humidity and low
temperature?
NO
Is there any dust on the room YES
temperature and humidity sensor?
Dehumidication may not be OK
possible in low humidity and
low temperature environments.
Explain the performance
curve on P9.
Remove the dust from the room OK
temperature and humidity sensor.
NO
Check if there is no disconnection or NG
contact failure of the connector (P10) and
connector pins of power control board.
Insert the connector and
connector pins securely.
OK
OK
Check the resistance of the room NG
temperature and humidity sensor.
(P10 connector)
Normal:Between the pin3 and pin4
NȍNȍ
Abnormal:Open or short
OK
The unit is normal.
14
Replace the room temperature
and humidity sensor.
OK
2) Simple Check Table for Main Parts
Component name
Tube temperature
sensing thermistor
Room
temperature and
humidity sensor
board
Testing procedure
Detach the connector and measure the resistance using a multimeter
(component temperature: 10℃ to 30℃).
Normal
Abnormal
Between P11 pins: 8.0kΩ to 20.8kΩ
Open or shorted
Detach the connector and measure the resistance using a multimeter
(component temperature: 10℃ to 30℃).
Normal: 47 to 51kΩ (between P10 pins 3 and 4)
Abnormal: Open or shorted
With the connector detached, measure the resistance across the terminals using a multimeter
(winding temperature: 10℃ to 30℃).
Abnormal
Normal
Compressor
C-R side
17Ω ~ 19Ω
C-S side
32Ω ~ 36Ω
Open or shorted
Measure the resistance between terminals using a multimeter
(winding temperature: 10℃ to 30℃).
Abnormal
Normal
Blower fan motor
Yellow-Blue
217Ω ~ 236Ω
Black-Blue
219Ω ~ 237Ω
Open or shorted
Measure the resistance between terminals using a multimeter
(component temperature: 10℃ to 30℃).
Solenoid valve coil
Normal
Abnormal
2.0kΩ ~ 2.2kΩ
Open or shorted
Measure the resistance across terminals with a multimeter.
(Part temperature: approx 25℃)
Stepping motor
Normal
Abnormal
342Ω ~ 418Ω
Open or shorted
Terminals 1-2
Terminals 1-3
Terminals 1-4
Terminals 1-5
15
3) Error Indications and Corrective Actions
Indication
(Timer display)
Error (failure)
E0
P10 connector out of position
Room temperature thermistor blowout
E1
Room temperature thermistor short
Room temperature and humidity
sensor board failure
E7
P11 connector out of position
Tube temperature thermistor blowout
E8
Tube temperature thermistor short
Tube temperature sensor failure
A1
Microprocessor failure
RAM error
A2
Frequency determination error
(When power is on)
A3
Frequency determination error
(During operation)
A6
Watchdog timer error
Replace the main board.
P4
Compressor
Follow the “Does it dehumidify?” in the “Failure
diagnosis flowchart” of P11.
Corrective action
Check the P10 connection.
Check the room temperature and humidity sensor
board.
Check the P11 connection.
Check the tube temperature thermistor.
Replace the main board.
Outlet/power check
(Replace the main and power supply boards.)
4) Self-Test Program and Execution Procedure
(1) Deactivating 3-minute restart prevent lock
① Start: Press the MODE and HUMIDITY SELECTION buttons together 3 times when the power
is off. Press the POWER button within 2 seconds.
② Functions:
① Deactivates 3-minute restart prevention lock (immediate operation)
② Fan: Fix at rank 6 (max. airflow)
③ Activates compressor
④ Operating mode: Low Temp
⑤ Low temperature is indicated on LCD.
⑥ When E2PROM error is detected, FULL, DRYING INSIDE and AIR PURIFIER LEDs are lit.
③ To end: Turn power off. The solenoid valve functions for 3 seconds.
16
(2) LED, LCD and fan tests
① Start:
Press the MODE and HUMIDITY SELECTION buttons simultaneously 4 times when the
power is off. Press the POWER button within 2 seconds.
② Mode select: Use the OFF/ON TIMER button to change the diagnosis mode (0 - 5).
LCD and
LED all lit
Room
temperature
indicator
Current
humidity
Tube
temperature
indicator
Determined
frequency
Current fan
rank
Examples
Mode displayed
For current humidity
(all displays in decimal)
(3) Operation/Error history mode
① Start:
Press the MODE and HUMIDITY SELECTION buttons simultaneously 5 times when the
power is off. Press the POWER button within 2 seconds.
② Mode select: Use the OFF/ON TIMER button to select indicator mode (0-F).
Example: Latest error display
Compressor
malfunction detected
P4 error
Error history display
0: Latest error
7: Oldest error
Tube temperature
Thermistor short-circuit
detected
E8 error
Watchdog error
Tube temperature
Thermistor open-circuit
detected
E7 error
A6 error
Frequency determination
error at power ON
A2 error
Room temperature
Thermistor short-circuit
detected
E1 error
Latest error
Display mode
When “display mode” is 8 to F, the number of error
generations is displayed in hexadecimal.
Frequency error
when fan operated
Room temperature
Thermistor open-circuit
detected
A3 error
E0 error
(4) Demo program
① Start:
With the power OFF, hold down the MODE and HUMIDITY SELECTION buttons,
and press the POWER button. The demo program starts in 3 seconds.
② Operations (all buttons are disabled):
① Fan: Fixed at rank 3
② Compressor/solenoid valve: Stopped
③ LCD/LED: Lights in random sequence
④ Swing louvre: Wide
③ End:
Remove power plug.
17
18
10. Troubleshooting
Note) This page is extracted from the instruction manual.
11. Maintenance
Note) This page is extracted from the instruction manual.
19
Note) This page is extracted from the instruction manual.
20
12. Service Checklist
(1) Points to be checked after completing repairing
After completing repairing, check the all items below to prevent re-repair.
Check items
Check
Was the proper tool used?
Are the parts on the parts catalog used?
Verify that there is no problem in the lead wire (layout and connection) and/or clamp.
Verify that there is no defect, such as lead wire caught in other parts, damage, and/or intermediate connection.
At installation
Verify that there is no defect, such as deteriorated or damaged power cord and/or intermediate connection.
Verify that there is no slack and/or damage to power cord.
Are the connectors and metal terminals inserted securely?
Verify that there is no abnormal sound of the motor etc.
If electrical parts are replaced, was the insulation performance checked?
Verify that there is no insufficient inserting or gap in the fitting and/or calking sections.
Is the cushioning attached without fail? Is the parts requires silicon coating surely coated with silicon?
Are the all sorts of specified screws on the parts catalog used?
Are the all sorts of packing, washers, etc. installed without fail?
Are the waterproofing and rust prevention performed on the products which require those treatment?
Installation conditions
Is the unit installed at the flat place?
Is the unit installed at the stable place? (The unit is not easy to fall down?)
Is a firm ground selected for the installation place? (Be careful with a hollow floor, corrosion, etc.)
Is there enough space around the unit? (Is there no wall, ceiling, curtains, etc. near the unit?)
Verify that the unit is not installed where it is exposed to direct sunlight or near heat- generating devices.
Verify that the unit is not installed in a special environment. (places where chemicals are used or there is a lot of dust.)
Is the product which requires earthing correctly earthed? (Do not connect the earth wire to a water pipe or gas pipe.)
Explanation
after repair
Operation check
Is the installation criteria described in the instruction or installation manual fulfilled?
Is the power on when you turn it on?
Is the basic operation described in the instruction manual successfully performed?
Verify that there is no problem in operation around the open and close part, rotation part, slide part, etc.
Verify that no abnormal sound or smell is emitted.
Is the power off when you turn it off.
Explain the content of repair, check, and/or adjustment to the customer well.
Tell the customer to read the instruction manual well to use this dehumidifier.
Tell the customer not to disassemble the product.
Explain to the customer if the installation place is not good or if there is more efficient way.
21
13. Precautions for Disassembly and Reassembly
The following precautions should be observed in order to perform disassembly and reassembly safely and correctly.
The following diagrams indicate circumstances where danger can result from mishandling the unit.
WARNING
Mishandling may result in fatal or serious injury, or fire.
CAUTION
Mishandling may result in minor or damage to your home or property etc.
Meanings of graphic symbols are explained below.
Always follow the
instructions
Forbidden
Alert
WARNING
Remove the power plug
from the socket.
When replacing parts,
use the specified parts
listed on the parts catalog.
Unplug
Failure to do so may cause electric shock or injuries.
Failure to do so may cause combustion,
smoke, and/or malfunction,
Do not touch a rotating object
until it completely stops.
Do not work
with wet hands.
The rotating object may
catch your hand etc,
and result in injuries.
Don’t touch
After the work,
lay the wire out as it was before.
Check
Failure to do so may cause combustion,
generation of smoke, and/or malfunction.
Return to
as it was
Do not alter the product.
Comply with the law.
This may cause fire, electric shock,
and/or injuries.
Follow the applicable laws and regulations,
such as “Fire Prevention Ordinance” and
Obey the law
“Electric Equipment Technical Standards.”
Failure to do so may cause fire and electric shock.
No alteration
Use appropriate tools.
Failure to do so may result in
an accident caused by contact failure
or loose parts.
Earth the product which
requires earthing correctly.
Use
proper tools
Do not damage or process
the power cord or lead wire.
This may cause fire, combustion,
and/or electric shock.
22
No wet hands
This may cause electric shock.
Check the wiring diagram
before wiring processing.
Failure to do so may cause combustion,
generation of smoke, and/or malfunction.
Return to
as it was
Incomplete earthing or connection to
a gas pipe, water pipe, etc.
may cause an explosion or electric shock.
Earth
Replace the damaged or
deteriorated power cord or
lead wire.
Forbidden
Failure to do so may cause fire,
combustion, and/or electric shock.
Replace
CAUTION
Wear protective gloves.
Keep children away.
Wear gloves
Failure to do so may result in injuries
by the edge of metal, electric shock,
and/or burns caused by contact with hot section.
Keep away
Failure to do so may result in
electric shock and/or injuries when moving
the unit or using a measuring device.
Do not put the unit
where it may burn.
Check the firmness
of installation location.
This may cause fire,
or combustion.
Do not
install unit
Perform operation
check after reassembly.
Failure to do so may result
in an accident or malfunction.
Check
The product may fall down,
which could cause an accident or injuries.
Do not wash the unit
with water.
Operation
check
No water
This may result in fire,
combustion, or malfunction
Safety precautions for the inspection and service
1. When the service requires disassembly, be sure to remove the power cord from the outlet.
2. When it is necessary to perform the work with the power on, be careful not to touch the live part.
3. Use appropriate tools for the work.
4. Use the specified parts listed on the “Parts Catalog” of the applicable model.
5. Check the deterioration of the power cord and lead wire at service.
Replace the damaged or deteriorated power cord and lead wire.
6. After the service, perform the operation check.
Verify that the tank full detection works properly and the unit operates without a problem.
23
14. Disassembly and Reassembly Hints
【Precautions for disassembly】
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7LJKWHQWKHVFUHZVLQWKDWFDVH
Ɣ:KHQWKHFDEOHWLHIL[LQJWKHOHDGZLUHLVFXWEHVXUHWRUHSODFHLWZLWKDQHZRQH
Ɣ5HPRYHGOHDGZLUHVKRXOGEHIL[HGWRDFODPSHUHWFDQGSHUIRUPZLULQJ
(1)Removing the water tank
①Open the front door and pull out the
water tank.ĺ5HPRYLQJWKHZDWHUWDQN
①
Main unit
Water tank
(2)Removing the front panel and air filter
①Push the front panel downward, and
SXOOWRZDUG\RXWRUHOHDVHWKHFDWFKHV
RQWKHERWWRP3XVKXSWRUHPRYH
ĺ5HPRYLQJWKHIURQWSDQHO
①
Front panel
Catches
Tabs
②Hold the tabs and pull the air filter
WRZDUG\RXWRUHPRYH
ĺ5HPRYLQJWKHDLUILOWHU
②
Air filter
Air filter
24
Tabs
(3)Removing and replacing the front casing assembly
①Remove the water tank.
ĺ
(Reference:(1)Removing the water
tank)
Special setscrews
③
②Removing the front panel assembly and
air filter.
ĺ5HIHUHQFH5HPRYLQJWKHIURQW
panel and air filter)
④
④
Catch(left side:1)
Catch(Right side:1)
③5HPRYHWKHVSHFLDOVHWVFUHZVDQG
front casing assembly setscrews(4).
Front casing
assembly setscrews
④'HWDFKWKHFDWFKHVIURPWKHVLGHRI
front casing assembly and pull the front
casing assembly toward you so that it is
away from the main unit.
Front casing assembly
④
⑤Raise the handle and remove the power
control board box setscrew.
⑥Pull the power control board box toward
\RXGHWDFKWKHFDWFKHVRQWKHER[OLG
(one on each side), and remove the lid.
Main unit
⑦Remove connectors P100 and P101 from
the power control board and remove the
IURQWFDVLQJDVVHPEO\ĺ5HPRYLQJDQG
replacing the front casing assembly)
Power control board box setscrew
Power control board box lid
⑤
Front casing assembly
⑥
⑦
Catches
⑦
Handle
Power control board Connectors(P100,P101)
(4)Removing and replacing the operation control board
①Remove the front casing assembly.
ĺ5HIHUHQFH5HPRYLQJDQGUHSODFLQJ
the front casing assembly)
②Detach the catches(bottom:4,right
side:1) to remove the operation control
ERDUGĺ5HPRYLQJDQGUHSODFLQJWKH
operation control board)
Operation control board
②
Front casing
assembly
Catch
Catches
25
(5)Removing and replacing the power control board
①Remove the power control board box lid.
ĺ5HIHUHQFH5HPRYLQJDQGUHSODFLQJWKH
front casing assembly)
Remove all connectors
from the power control board
Power control board
②
②Remove all connectors from the power
control board to remove the power control
ERDUGĺ5HPRYLQJDQGUHSODFLQJWKHSRZHU
control board)
(6)Removing and replacing the condenser for compressor and tube temperature thermister
①Remove the power control board box lid.
ĺ5HIHUHQFH5HPRYLQJDQGUHSODFLQJWKH
front casing assembly)
②Remove the connector P4 to remove the
condenser for compressor from the power
FRQWUROERDUGĺ5HPRYLQJDQGUHSODFLQJWKH
condenser for compressor)
③Remove the connector P11 from the power
control board to remove the tube temperature
thermister from the right side of heat
exchanger.
ĺ5HPRYLQJDQGUHSODFLQJWKH
temperature/humidity sensor)
Connector(P4)
③
Tube
temperature
thermister
Power
control
board
Connector(P11)
②
③
Heat exchanger
Condenser for compressor
(7)Removing the rear casing
①Remove the front casing.
ĺ5HIHUHQFH5HPRYLQJDQGUHSODFLQJWKH
front casing assembly)
Louvre
②
②Detach the rear casing setscrews(6).
③Detach the screw stop bosses(2) on the top
of rear casing and the guides(2) on the side
of the fan assembly.
Rear casing setscrews
④Lift the rear casing upward, and remove from
XQGHUWKHORXYUHĺUHPRYLQJWKHUHDU
casing)
Louvre
③
④
③
Catches (one on each side)
Rear casing
26
(8)Removing and replacing the stepping motor and temperature/humidity sensor
①5HPRYHWKHUHDUFDVLQJĺ5HIHUHQFH
(7)Removing the rear casing)
②
③
Connector(P10)
②Remove the connector P20 and stepping
motor setscrews(2) to remove the stepping
PRWRUĺ5HPRYLQJDQGUHSODFLQJWKH
stepping motor)
Connector(P20)
Stepping motor setscrews
③Remove the connector P10 and tape to
separate the lead wire from the blower fan
guide casing.
②
④Detach the catch(1) from the blower fan
Stepping motor
assembly to remove the
WHPSHUDWXUHKXPLGLW\VHQVRUĺ5HPRYLQJ
Blower fan assembly
and replacing the temperature/humidity
sensor)
Temperature/humidity sensor Blower fan assembly
Blower fan assembly Catch
③
④
Blower fan assembly
④
④
Drainpan assembly
Temperature/humidity sensor
Drainpan assembly
(9)Removing and replacing the solenoid valve and plug cord
①Remove the rear casing.
ĺ5HIHUHQFH5HPRYLQJWKH
rear casing)
②Remove the connector P3 from the
power control board and remove
the solenoid valve setscrew(1) to
remove the solenoid valve.
ĺ5HPRYLQJDQGUHSODFLQJWKH
solenoid valve)
③Remove the earth wire setscrew(1)
to remove the earth wire.
④Remove the connector P1 and
separate the power plug cord wire
from the clamper to remove the
power plug from the gap of the
EDVHĺ5HPRYLQJDQGUHSODFLQJ
the plug cord)
Connector(P1)
Connector(P3)
②
④
Solenoid valve
Solenoid valve setscrew
④
③
Earth wire setscrew
Earth wire
Plug cord
Gap
Base
27
(10)Removing and replacing the blower fan and blower fan motor
①Removing the rear casing.
ĺ5HIHUHQFH5HPRYLQJWKHUHDU
casing)
Blower fan
Blower fan
guide casing
Blower fan locknut
③
Catch
③
④
②Remove the power control board.
ĺ5HIHUHQFH5HPRYLQJDQG
replacing the power control board)
③Remove the blower fan locknut(1)
to remove the blower fan.
ĺ5HPRYLQJDQGUHSODFLQJWKH
blower fan)
④Detach the catch which fixes the
blower fan motor lead wires to
blower fan guide casing and detach
lead wires from the blower fan
guide casing.
Blower fan motor
Blower fan motor
holding plate setscrews
Blower fan motor
④
⑤
Blower fan motor
holding plate
Cushion
⑥
Blower fan motor
(blower fan side)
⑤Remove the blower fan motor
holding plate setscrews(3).
Cushion
⑥
⑥Remove the blower fan motor
holding plate and cushions to
remove the blower fan motor.
ĺ5HPRYLQJDQGUHSODFLQJWKH
blower fan motor)
Blower fan motor
(casing side)
Blower fan motor holding plate
(11)Removing and replacing the blower fan assembly
①Removing the rear casing.
ĺ5HIHUHQFH5HPRYLQJWKHUHDU
casing)
Heat exchanger
assembly
Drainpan assembly
④
②Removing the power control
ERDUGĺ5HIHUHQFH5HPRYLQJ
and replacing the power control
board)
③Remove the lead wires from the
clampers on the blower fan guide
casing sides.
④Detach the catches from the
blower fan assembly and drainpan
assembly.Then Pull upward the
blower fan assembly leaning
toward the heat exchanger to
remove the blower fan assembly.
ĺ5HPRYLQJDQGUHSODFLQJWKH
blower fan assembly)
Catches(2)
④
④
Blower fan
assembly
Drainpan
assembly
28
Blower fan assembly
Catches(2)
(12)Removing and replacing the float switch
①Remove the blower fan assembly.
ĺ5HIHUHQFH5HPRYLQJDQGUHSODFLQJ
WKHEORZHUIDQDVVHPEO\
Drainpan assembly
Heat exchanger assembly
②
②Remove the float switch form the drainpan
DVVHPEO\ĺ5HPRYLQJDQGUHSODFLQJWKH
IORDWVZLWFK
Float switch
(13)Removing the drainpan
①Remove the blower fan assembly.
ĺ5HIHUHQFH5HPRYLQJDQG
UHSODFLQJWKHEORZHUIDQDVVHPEO\
③
Rear side of the drainpan assembly
②Separate all the lead wires from the
clampers on the drainpan assembly.
③'HWDFKWKHFDWFKHVRQWKHUHDUVLGH
RIGUDLQSDQDVVHPEO\DQGFDWFKHVRQ
the front side of drainpan assembly.
Pull the base backward while lifting the
right side of the heat exchanger and
remove the drainpan assembly from the
EDVHĺ5HPRYLQJWKHGUDLQSDQ
DVVHPEO\
Catches
Heat exchanger
③
③
Front side of the
drainpan assembly
Base
Catch
Drainpan assembly
③
Base
Compressor
Front side of the
drainpan assembly
Catch
Base
29
(14)Removing and replacing the compressor/heat exchanger assembly
①Remove the drainpan assembly.
ĺ5HIHUHQFH5HPRYLQJWKH
drainpan assembly)
Heat exchanger assembly
②
③
②Put a support under the right side
RIWKHKHDWH[FKDQJHUDVVHPEO\
Remove the compressor setscrews
③Remove the compressor and heat
H[FKDQJHUDVVHPEO\IURPWKH
EDVHĺ5HPRYLQJDQGUHSODFLQJ
the compressor/heat exchanger)
Drainpan
assembly
Compressor
Base
<Compressor part:wiring layout>
Red(S)
Gray(R)
White(C)
Base
30
Compressor setscrews
31
15. Parts Catalog
Model MJ-E21BG-S1-IT Exploded View
<Casing and Structure>
D
114
109
107
C
B
108
106
113
105
112
111
117
110
A
116
115
102
32
103
101
104
118
Ins
t
Borouction
k
Model MJ-E21BG-S1-IT Parts List
<Casing and Structure>
Notes:
1. Circled reference numbers indicate performance parts.
2. New parts and the parts that are used only with these models lack compatibility.
3. Those parts that are marked by
and
are of critical importance for sustaining safety and performance. Use specified
parts atreplacement.
4. When ordering parts without part numbers, use the design number. The order may take a while to process.
Exploded
View
Matching No.
Part Name
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
TANK*160VX
COVER-T*ASSY-E16VX-W
LID-TANK*160VX
FLOAT*ASSY-100S(X)
CASE-F*100VX-C
ESC-SW*E21BG-S1-IT
PCA*E21BG-S1-IT*M
CLAER-PLATE*E16VX
FIXTURE-PCA-M*100T(X)
PANEL-F*ASSY-E16VX-W
FILTER*ASSY-E82CF
FILTER-MJPR-ECGFT
CASE-R*160VX
HANDLE*100/160V(X)
BASE*EBG
DRAINPAN*E22WX
SWITCH-LEVEL*160WX
TANK*ASSY-160VX
A
B
C
D
SCW-PL-TBFZR 4X12
SCW-MPFZR M4X14-TORX
SCW-PL-TBFZR 4X12
SCW-PL-TBFZR 4X16
Part No.
M22 C89 345
M22 C39 741
M22 B29 697
M22 B25 379
M22 B25 233H
M22 C96 440
M22 C96 689
M22 C62 449
M22 B19 781
M22 C39 001
M22 C84 320
M48 5C7 859
M22 C56 310R
M22 B25 063
M22 C96 200
M22 C73 340
M22 C44 501
M22 C89 345T
Safety Pc/1
Part unit
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Compatibility/Miscellaneous
E100BF-C
E22VX
160VX
100VX
100VX
New
New
E16AX-H
100T
E22VX
E82CF-H
Expendable item E92CG-TW
E22VX-C
100VX
New
E21CX-S1-IT
E16VX-S1-IT
E100BF-C
4
2
8
1
*1. If the part is out of production, you may be required to use a common part.
*2. Parts found installed in products may have a different part number from service parts. However, there should be
no difference inperformance and can be installed.
33
Model MJ-E21BG-S1-IT Exploded View
<Casing and Structure>
209 213
212
211
206
207
205
216
214
210
218
A
208
220
204
219
Ins
t
Borouction
k
201
217 215
34
202
203
221
Model MJ-E21BG-S1-IT Parts List
<Casing and Structure>
Notes:
1. Circled reference numbers indicate performance parts.
2. New parts and the parts that are used only with these models lack compatibility.
3. Those parts that are marked by
and
are of critical importance for sustaining safety and performance. Use specified
parts atreplacement.
4. When ordering parts without part numbers, use the design number. The order may take a while to process.
Exploded
View
Matching No.
Part Name
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
-
SPRING-S*100S(X)
STOPPER-PLATE*100S(X)
PACKING-RUB
CASING-E22WX
STEPPING-MOTOR*CX
RUN CAPACITOR*E26RX
LEAD WIRE-R/C*140TX
BOX-PCA*S100D
INS-PLATE-MICA*S100D
COVER-BOX*S100D
NET-100B
LOUVER-V(X)
SUPPORT-LOUVER*S(X)
LEAD WIRE S/M*VX
WHEEL*P(X)
SUPPORT-HANDLE*160WX
SHAFT-B*HX
ESC-PL*E22VX
ESC-FILTER*E22WX
NAME-PL*E21BG-S1-IT
I.B*E21BG-S1-IT
P-CASE*E21BG-S1-IT
A
SCW-TPFZR 3X8N
Part No.
M22 B15 128
M22 B15 788
M22 J67 923
M22 C73 310
M22 B46 620S
M22 C15 353
M22 B19 130
M22 C79 311
M22 B59 730
M22 C79 320
M22 B41 360
M22 B25 045
M22 B15 036
M22 J90 908
M22 C99 261
M22 B70 100
M22 C59 468
M22 C58 468F
M22 C96 450
M22 C96 936
M22 C96 754
Safety Pc/1
Part unit
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
4
1
1
1
1
1
Compatibility/Miscellaneous
100SX
100SX
100NX
E21CX-S1-IT
H100CX
E26RX-H
440V 8.0UF
100T
E100WX-TW2
E100WX-TW1
E100WX-TW2
S100B
100VX
100SX
100P
E20BG-E1
100HX
E22WX-H-C
E26WX-H
New
New
New
2
*1. If the part is out of production, you may be required to use a common part.
*2. Parts found installed in products may have a different part number from service parts. However, there should be
no difference inperformance and can be installed.
35
Model MJ-E21BG-S1-IT Exploded View
<Electrical Parts>
301
306
A
307
303
E
C
302
B
D
309
36
304
308
305
Model MJ-E21BG-S1-IT Parts List
<Electrical Parts>
Notes:
1. Circled reference numbers indicate performance parts.
2. New parts and the parts that are used only with these models lack compatibility.
3. Those parts that are marked by
and
are of critical importance for sustaining safety and performance. Use specified
parts atreplacement.
4. When ordering parts without part numbers, use the design number. The order may take a while to process.
Exploded
View
Matching No.
Part Name
301
302
303
304
305
306
307
308
309
PBA-T*E14CG*P
SENSOR*HUM-E22WX
FAN-S100D*ASSY
HOLDING PLATE-M*NX-R
MOTOR-E22WX
LEAD WIRE-C/P*EV(X)
MOTOR PRO*ASSY-E22VX
RUBBER-MOUNT*S(X)
PLUG CORD*EVX-K/S1
M22 C92 689
M22 C73 150
M22 B25 500
M22 C98 260
M22 C73 620
NUT-LFZR M6
SCW-PL-TBFZR 4X12
SCW-TPFZR 5X35M
SPL WASHER-R
SCW-BPBN M4X6
M22 C60 041
A
B
C
D
E
Part No.
M22 C59 502
M22 B13 511
M22 C60 509
Safety Pc/1
Part unit
1
1
1
1
1
1
1
3
1
Compatibility/Miscellaneous
E14CG-S1-SWE
E21CX-S1-IT
100VX
E14EG-E1
E21CX-S1-IT
Lead wire attached E22WX-H
180SX
E100VX-K
1
3
3
3
1
*1. If the part is out of production, you may be required to use a common part.
*2. Parts found installed in products may have a different part number from service parts. However, there should be
no difference inperformance and can be installed.
37
Model MJ-E21BG-S1-IT Exploded View
<Compressor Parts>
419
411
412
A
401
403
402
413
414
415
416
406
417
418
404
421
405
407
408
409
420
38
422
410
Model MJ-E21BG-S1-IT Parts List
<Compressor Parts>
Notes:
1. Circled reference numbers indicate performance parts.
2. New parts and the parts that are used only with these models lack compatibility.
3. Those parts that are marked by
and
are of critical importance for sustaining safety and performance. Use specified
parts atreplacement.
4. When ordering parts without part numbers, use the design number. The order may take a while to process.
Exploded
View
Matching No.
Part Name
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
S/COIL TAPE*ASSY-EDX
SOLENOID VALVE-R
TAPE
THERMISTOR-EVA*CG
COOLER*E22WX
CONDENSER*E22WX
CLIP*1400PX
COVER TERMINAL*1400
PACKING*1400PX
COMP*6TD068DCA41
PIPE-SV-CT*E22WX
PIPE-CT*E100DX
CHARGE-PIPE*CG
JOINT-E16V(X)
PIPE-DJ*EBG
PIPE-IN-COOL*EBG
PIPE-OUT-COOL*EBG
PIPE-OUT-CON*E22WX
PIPE-IN-CON*EBG
PIPE COVER*COMP
PIPE-SUC*E100DX*ASSY
PIPE-DIS*E100DX*ASSY
A
SCREW SEMS M5X0.8X6
Part No.
M22 C78 629
M22 C84 629
M22 C91 555
M22 C77 390
M22 C77 390H
M22 B60 069
M22 J93 018
M22 J93 923
M22 C77 118
M22 C91 420
M22 C92 320
M22 C88 420S
M22 C96 420
Safety Pc/1
Part unit
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Compatibility/Miscellaneous
220-240V
E140DX-H
E82CF-H
E92CG-TW
E100DX-H
E100DX-H
E180VX-TW1
160PX
160PX
6TD068DCA41 E100DX-H
E92CG-TW
E14CG-S1-SWE
E80CF-C
New Damper attached
1
*1. If the part is out of production, you may be required to use a common part.
*2. Parts found installed in products may have a different part number from service parts. However, there should be
no difference inperformance and can be installed.
39