TECHNICAL & SERVICE MANUAL
Air-Conditioners For Building Application
<Indoor unit>
PEFY-P20VML-A
PEFY-P25VML-A
PEFY-P32VML-A
2001
Models
INDOOR UNIT
Ceiling Concealed
Series PEFY
CONTENTS
SAFETY PRECAUTIONS·························1
1. FEATURES ···········································3
2. PART NAMES AND FUNCTIONS········4
3. SPECIFICATION ···································6
4. OUTLINES AND DIMENSIONS············8
5. WIRING DIAGRAM ······························· 9
6.
REFRIGERANT SYSTEM DIAGRAM
····10
7. TROUBLE SHOOTING ·······················11
8. DISASSEMBLY PROCEDURE···········
14
1
SAFETY PRECAUTIONS
and install the unit at the specified place.
- Improper installation may cause the unit to topple and result in
injury.
• Always use an air cleaner , humidifier, electric heater , and other
accessories specified by Mitsubishi Electric.
- Ask an authorized technician to install the accessories. Improper
installation by the user may result in water leakage, electric shock,
or fire.
• Never repair the unit. If the air conditioner must be repaired,
consult the dealer.
- If the unit is repaired improperly, water leakage, electric shock, or
fire may result.
• Do not touch the heat exchanger fins.
- Improper handling may result in injury.
• If refrigerant gas leaks during installation work, ventilate the
room.
- If the refrigerant gas comes into contact with a flame, poisonous
gases will be released.
• Install the air conditioner according to this Installation Manual.
- If the unit is installed improperly, water leakage, electric shock, or
fire may result.
• Have all electric work done by a licensed electrician according
to “Electric Facility Engineering Standard” and “Interior Wire
Regulations”and the instructions given in this manual and always use a special circuit.
- If the power source capacity is inadequate or electric work is per-
formed improperly, electric shock and fire may result.
• Securely install the cover of control box and the panel.
- If the cover and panel are not installed properly,dust or water ma y
enter the outdoor unit and fire or electric shock may result.
• When installing and moving the air conditioner to another site,
do not charge the it with a refrigerant different from the refrigerant (R22) specified on the unit.
- If a different refrigerant or air is mixed with the original refrigerant,
the refrigerant cycle may malfunction and the unit may be damaged.
• If the air conditioner is installed in a small room, measures
must be taken to prevent the refrigerant concentration from
exceeding the safety limit even if the refrigerant should leak.
- Consult the dealer regarding the appropriate measures to pre-
vent the safety limit from being exceeded. Should the refrigerant
leak and cause the safety limit to be exceeded, hazards due to
lack of oxygen in the room could result.
• When moving and reinstalling the air conditioner, consult the
dealer or an authorized technician.
- If the air conditioner is installed improperly, water leakage, elec-
tric shock, or fire may result.
• After completing installation work, make sure that refrigerant
gas is not leaking.
- If the refrigerant gas leaks and is exposed to a fan heater, stove,
oven, or other heat source, it may generate noxious gases.
• Do not reconstruct or change the settings of the protection
devices.
- If the pressure switch, thermal switch, or other protection device
is shorted and operated forcibly , or parts other than those specified
by Mitsubishi Electric are used, fire or explosion may result.
1. Before installation and electric work
s Before installing the unit, make sure you read all the
“Safety precautions”.
s The “Safety precautions” provide very important
points regarding safety. Make sure you follow them.
s This equipment may cause the adverse effect on the
same supply system.
s Please report to or take consent by the supply au-
thority before connection to the system.
Symbols used in the text
Warning:
Describes precautions that should be observed to prevent danger
of injury or death to the user.
Caution:
Describes precautions that should be observed to prevent damage
to the unit.
Symbols used in the illustrations
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts. (This
symbol is displayed on the main unit label.) <Color: Yellow>
: Beware of electric shock (This symbol is displayed on the main
unit label.) <Color: Yellow>
Warning:
Carefully read the labels affixed to the main unit.
Warning:
• Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user may result in water leakage, elec-
tric shock, or fire.
• Install the air unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in
injuries.
• Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the
terminals.
- Inadequate connection and fastening may generate heat and cause
a fire.
• Prepare for typhoons and other strong winds and earthquakes
2
2. Precautions for devices that use
R407C refrigerant
Caution:
• Do not use the existing refrigerant piping.
- The old refr igerant and refrigerator oil in the existing piping contains a large amount of chlorine which ma y cause the refrigerator
oil of the new unit to deteriorate.
• Use refrigerant piping made of C1220 (CU-DHP) phosphorus
deoxidized copper as specified in the *JIS H3300 “Copper and
copper alloy seamless pipes and tubes”. In addition, be sure
that the inner and outer surfaces of the pipes are clean and
free of hazardous sulphur, oxides, dust/dirt, shaving particles,
oils, moisture, or any other contaminant.
- Contaminants on the inside of the refrigerant piping may cause
the refrigerant residual oil to deteriorate.
*JIS: Japanese Industrial Standard
• Store the piping to be used during installation indoors and keep
both ends of the piping sealed until just before brazing. (Store
elbows and other joints in a plastic bag.)
- If dust, dirt, or water enters the refrigerant cycle, deterioration of
the oil and compressor trouble may result.
• Use ester oil, ether oil or alkylbenzene (small amount) as the
refrigerator oil to coat flares and flange connections.
- The refrigerator oil will degrade if it is mixed with a large amount of
mineral oil.
• Use liquid refrigerant to fill the system.
- If gas refrigerant is used to seal the system, the composition of
the refrigerant in the cylinder will change and performance may
drop.
• Do not use a refrigerant other than R407C.
- If another refrigerant (R22, etc.) is used, the chlorine in the refrig-
erant may cause the refrigerator oil to deteriorate.
• Use a vacuum pump with a reverse flow check valve..
- The vacuum pump oil may flow back into the refrigerant cycle and
cause the refrigerator oil to deteriorate.
• Do not use the following tools that are used with conventional
refrigerants.
(Gauge manifold, charge hose, gas leak detector, reverse flow
check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment)
- If the conventional refrigerant and refrigerator oil are mixed in the
R407C, the refrigerant may deteriorated.
- If water is mixed in the R407C, the refrigerator oil may deteriorate.
- Since R407C does not contain any chlorine, gas leak detectors
for conventional refrigerants will not react to it.
• Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
• Be especially careful when managing the tools.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant
may deteriorate.
3
PEFY-P20VML-A
PEFY-P25VML-A
PEFY-P32VML-A
2.2/2.5
2.8/3.2
3.6/4.0
FEATURES
1
Indoor unit
Ceiling Concealed
Series PEFY
Models
Cooling capacity/Heating capacity
kW
4
PART NAMES AND FUNCTIONS
2
● Indoor (Main) Unit
● Remote controller
● Operation buttons
[PAR-20MAA]
●Once the controls are set, the same operation mode can
be repeated by simply pressing the ON/OFF button.
Air inlet
Air outlet
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
1
2
3
4 56879
0
C
A
B
1 [Room temperature adjustment] Button
2 [Timer/continuous] Button
3 [Selecting operation] Button
4 [Time selection] Button
[Time-setting] Button
5 [Louver] Button
6 [Fan speed adjustment] Button
7 [Up/down airflow direction] Button
8 [Ventilation] Button
9 [Checking/built-in] Button
0 [Test run] Button
A [Filter] Button
B [ON/OFF] Button
C Position of built-in room temperature
•Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measurement of room temperature.
•Never place any obstacle around the lower right-hand section of the remote controller.Doing so can
result in the erroneous measurement of room temperature.
● Display
(A) Current time/Timer
(B) Centralized control
(C) Timer ON
(D) Abnormality occurs
(E) Operation mode: COOL, DRY, AUTO, FAN, HEAT
(F) Preparing for Heating mode
(G) Defrost mode
(H) Set temperature
(I) Power ON
(J) Louver
(K) Not available function
(L) Ventilation
(M) Function setting mode
(N) Test run mode
(O) Error check mode
(P) Filter sign
(Q) Set effective for 1 hr.
(R) Sensor position
(S) Room temperature
(T) Airflow
(U) Fan speed
5
ABCD
SQTU
E
F
STAND BY
DEFROST
G
CENTRALLY CONTROLLED
CHECK
˚C
ON OFF
CLOCK
ERROR CODE
TEMP.
HIKLJ
1Hr.
NOT AVAILABLE
˚C
ON/OFF
FILTER
CHECK MODE
TEST RUN
FUNCTION
R
P
O
N
M
6
3
SPECIFICATION
3-1. Specification
PEFY-P20VML-A
~220-240V 50Hz / 60Hz
PEFY-P25VML-A PEFY-P32VML-A
2.2 2.8 3.6
2.5 3.2 4.0
Power source
kWCooling capacity ❇1
kW
kWCooling
Heating
Cooling
Heating
kW
A
A
mm
mm
mm
kg
m
3
/min
Pa
kW
mm
mm
dB(A)
Heating capacity ❇1
Power consumption
(50/60Hz)
Current
External finish
Dimension
Height
Width
Depth
Net weight
Heat exchanger
Fan
Type
Airflow rate
(Lo-Mid-Hi)
External static
pressure
Motor
Output
Type
Air filter
Refrigerant
pipe dimension
Gas
(Brazing)
Liquid
(Brazing)
Drain pipe dimension
Noise level (Lo-Mid-Hi)
Galvanized steel plate
225
720
550
18
Cross fin (Aluminum plate fin and copper tube)
Sirocco fan✕1
Single phase induction motor
PP Honeycomb fabric (washable)
ø
12.7
ø
6.35
R1 (External thread)
5.4-6.5-7.9 6.0-7.5-9.5
5
0.023 0.032
29-33-36 30-35-40
0.05/0.06
0.05/0.06
0.24/0.28
0.24/0.28
0.07/0.09
0.07/0.09
0.32/0.42
0.32/0.42
Note: ❇1 Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Cooling : Indoor 27˚CDB/19˚CWB,Outdoor 35˚CDB (WR2: water 30˚C)
Heating : Indoor 20˚CDB,Outdoor 7˚CDB/6˚CWB (WR2: water 20˚C)
7
LEV
C1
MF1,2
PEFY-P20VML-A
3-2. Electrical parts specifications
Model
Parts
name
Tranrsformer T (Primary) 50/60Hz 220-240V (Secondry) (23.5V 0.9A)
TH21 Resistance 0˚C/15kW,10˚C/9.6kW,20˚C/6.3kW,25˚C/5.4kW,30˚C/4.3kW,40˚C/3.0kW
TH22 Resistance 0˚C/15kW,10˚C/9.6kW,20˚C/6.3kW,25˚C/5.4kW,30˚C/4.3kW,40˚C/3.0kW
Gas pipe
thermistor
FUSE 250V 6.3A
TB2 (L,N, ) 330V 30A
TB5
TB15
(1,2),(M1,M2,S) 300V 10A
Fuse
(Indoor con-
troller board)
Power supply
terminal bed
Transmission
terminal bed
PEFY-P25VML-A PEFY-P40VML-A
OFF 135˚C±5˚C
ON 95˚C±15˚C
Room
temperature
thermistor
Fan motor
(with Inner-
thermostat)
4-pole Output 23W
CRC4417AB
4-pole Output 32W
CRC4418AB
Symbol
DC12V Stepping motor drive
port dimension ø3.2(0~2000pulse)
EDM-402MD
TH23 Resistance 0˚C/15kW,10˚C/9.6kW,20˚C/6.3kW,25˚C/5.4kW,30˚C/4.3kW,40˚C/3.0kW
Innerthermostat
(Fan motor)
Liquid pipe
thermistor
Fan motor
capacitor
Linear
expansion valve
1.5µF✕440V
2.0µF✕440V
8
4
OUTLINES AND DIMENSIONS
Indoor Unit PEFY-P20·25·32VML-A
Unit : mm
Reguired space for service and maintenance
Ceiling surface
Access door
Make the access door at the appointed position properly for service maintenance.
Air filter
80
3
1
2
Refrigerant piping brazing connection
(
gas ø12.7 copper tube
) :
LP
Refrigerant piping brazing connection
(
liquid ø6.35 copper tube
) :
HP
Drain piping connection R1 (External thread)
Note1.Use M10 screw for the lifting bolt (field supply).
2.Keep the service space for the maintenance from
the bottom when the heat exchanger is cleaned.
3.The direction of air intake can be changed from the
bottom to the rear by attaching the bottom plate
to the air intake side.
4.Drain Pan is changeable from right and left.
5.The dimension is changed, in case the optional
long-life filter is attached.
Rear Air-Intake spec.
:
Depth is increased by 30mm
Bottom Air-Intake spec.
:
Height is increased by 30mm
Lifting bolt
The part air intake duct is attached.
(When the air intake duct is used)
Terminal bed
(Power source)
Terminal bed
(Transmission)
720
23 664(Lifting bolt pitch)
710
Bottom plate
Control box
50
80 610
65.542.5
225
204.5
148
510
30
15
14127
13.55050
Detailed chart around the air intake duct frange
(Duct and frange should be supplied in the field)
189
301301 55
9 12
550
More than 20mm
More than 20mm
113
15
55459(Lifting bolt pitch)
14
16
582
50X11=550
Air outlet
Air inlet
25
500
300
450
450
( 3)
( 1)
( 2)
12-ø3
2X3-ø3
( 3)
( 1)
( 2)
50 150
50 150
··················· 1
··············· 2
········ 3
9
5
WIRING DIAGRAM
PEFY-P20·25·
32VML-A
INSIDE SECTION OF CONTROL BOX
TERMINAL BED)
TERMINAL BED)
BC CONTROLLER
REMOTE CONTROLLER
O OUTDOOR UNIT
TO MA REMOTE CONTROLLER
1
2
TB15(TRANSMISSION
1
3
I.B
CN3A
T
TB5(TRANSMISSION
M1
M2
S(SHIELD)
1
2
CN2M
X05X06 X04
X01
ZNR
F1
PULL BOX
TO NEXT INDOOR UNIT
1
3
S.B
CN1
DSA1
ZNR1
FAN3
5
17
CNP
13
3
CND
13
FUSE(16A)
TB2
L
N
PE
BREAKER(16A)
1
3
4
63
*insert
98198
1
1
3
3
4
4
5
5
6
8
8
9
9
C
*A
(White)
220,230,240V
50,60Hz
~
POWER SUPPLY
TO DUCT
PE
(Blue)
MF
Color/Power source
The motor connector is connected
White/230V,240V
with 230V,240V power at factory shipment.
If 220 power is used,
insert the attachment.
Blue/220V
insertion connector or fastening connector of control board.
2.Mark indicates terminal bed, connector, board
NOTE;1.The wirings to TB2,TB5 shown in dotted line are field work.
CNT
1
T
1
CN3T
3
1
2
3
43
5
6
11
2
CN31 CN60
1
2
CN29
2
CN21
1
2
CN20
3
2
1
4
5
0
9
6
7
8
SW11
(1st digit)
3
2
1
4
5
0
9
6
7
7
8
6
56
4321
A.B
SW5
CN62
SW1
CN82
8
8
(2nd digit)
SW12
4
3
5
2
6
1
7
0
8
F
9
E
A
B
D
C
(Connection No.)
SW14
6
7
5
2
3
4
1
LEV
TH23
TH22TH21
NAME
Thermistor (inlet temp.detection)
TH21
NAME
Fan motor
SYMBOL EXPLANATION
MF
SYMBOL SYMBOL
Thermistor (piping temp.detection/liquid)
Switch (2nd digit address set)
Thermistor (piping temp.detection/gas)
Switch (1st digit address set)
SW12(A.B)
SW11(A.B)
TH23
TH22
Power source terminal bed
Address board
Indoor controller board
*A Capacitor (for MF)
TB2
A.B
I.B
C
*A Capacitor
Switch(for mode selection)
Switch (connection No.set)
Switch(for capacity code)
Switch(for mode selection)
SW1(A.B)
SW14(A.B)
SW3(I.B)
SW2(I.B)
Transmission terminal bedTB15
Transmission terminal bed TB5
Transformer
T
F1 Fuse AC250V 6.3A F
MODELS 20/25 1.5mF
MODEL 32 2.0mF
Switch(for voltage selection)
Switch(for model selection)
SW5(A.B)
SW4(I.B)
Electronic linear expan. valve
Aux.relay
X06
~
X04
LEV
S.B Surge absorber board
SW2
SW3
SW4
CN42
4
321
AC250V
4
321
6.3A F
CN81
5
10
REFRIGERANT SYSTEM DIAGRAM
6
Gas pipe
PEFY-P20,25,32VML-A
ø
12.7<1/2>
Liquid pipe
ø
6.35<1/4>
Capacity
Item
Gas pipe thermistor TH23
Liquid pipe thermistor TH22
Heat exchanger
Linear expansion valve
Strainer (#100mesh)
Room temperature thermistor TH21
Gas pipe
Brazed joints
Strainer (#100mesh)
11
7
TROUBLE SHOOTING
7-1. How to check the parts
Room temperature
thermistor
(TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Trans
Fan motor
Linear expansion
valve
Disconnect the connector, then measure the resistance using a tester.
(Sorrounding temperature 10¡C~30¡C)
Disconnect the connector and measure the resistance using a tester.
Measure the resistance between the terminals using a tester. (at 20˚C)
Disconnect the connector then measure the resistance valve using a tester.
(Refer to the thermistor characteristic graph)
Normal
4.3kW~9.6kW
Abnormal
Open or short
CNT(1)-(3)
Normal
App.15W
CN3T(1)-(3) App.4W
Abnormal
Open or short
Motor terminal
or
Relay connector
Normal
P20·25
P32
Abnormal
Gray-Orange
281.4
W
Open or short
Gray-Black
Gray-Brown
Gray-Blue
307.9
W
347.0
W
420.4
W
233.6
W
254.8
W
325.0
W
399.3
W
Normal
(1)-(5)
White-Red
150W ±10%
Abnormal
Open or short
(2)-(6)
Yellow-
Brown
(3)-(5)
Orange-Red
(4)-(6)
Blue-Brown
Parts name Check points
PEFY-P20· 25·32
<Thermistor characteristic graph>
Room temperature thermistor(TH21)
Liquid pipe thermistor(TH22)
Gas pipe temperature thermistor(TH23)
Drain sensor(DS)
Thermistor R
0=15kW ± 3%
Fixed number of B=3480k
W ± 2%
Rt=15exp { 3480( ) }
0˚C 15kW
10˚C 9.6kW
20˚C 6.3kW
25˚C 5.2kW
30˚C 4.3kW
40˚C 3.0kW
1
273+t
1
273
CN3T
3
CNT
1
3T
Protector
LEV
CN60
White
Yellow
Orange
Blue
Red
Brown
Relay connector
Gray
1
Blue
3
Brown
4
Black
Orange
Red
White
5
6
8
9
1
2
3
4
5
6
50
40
30
20
Resistance (kW)
10
0
-20 -10
0 1020304050
Temperature (˚C)
12
7-2. Setting of address switch
Make sure that power source is turning off.
1)In case using network remote controller, address is set by rotary switches.(SW11,SW12)
* It is not necessary setting address in case of using unit remote controller.
2) Indoor unit address setting rule is different by each field work.
Refer to install manual of outdoor unit , operate the address setting.
3)Setting the address is combination of SW11(1st digit address setting) and SW12(2nd digit address setting).
Address " 3 " setting is composed SW11 " 3 " and SW12 " 0 " .
Address " 25 " setting is composed SW11 " 5 " and SW12 " 2 " .
Indoor unit do not run without address setting in field.
SW2 SW3 SW4
Indoor unit control board
< At delivery (All models)>
ON
OFF
ON
W254613G03
FP-AD-S
MADE IN JAPAN
1
JP1
3
2
1
SWCSWA
SW1
123456789
SW1
10
SW120SW11
0
240V 220V
SW14
SW5
SW 4
ON
OFF
10
CN828161
0
JP2
12 43
CN62
JP3
JP4
< At delivery (All models)>
Refer to the next page for SW2,SW3 setting.
13
7-3. Setting of Dip-switch (at delivery)
Models Dip-SW
7-4. Function the LED of the indoor unit service board
7-4. Function the unit of the indoor
LED service board
(Standard)
PEFY-P20VML
ON
OFF
SW1 SW2
12345678910 12345678910 123123456
ON
OFF
ON
OFF
SW3 SW4
ON
OFF
SW5
ON
220V
240V
OFF
4
PEFY-P25VML
PEFY-P32VML
ON
OFF
ON
OFF
SW1 SW2
12345678910 12345678910123456
SW1 SW2
12345678910 12345678910123456
ON
OFF
ON
OFF
ON
OFF
ON
OFF
SW3
SW3
ON
OFF
ON
OFF
SW4
123
SW4
123
SW5
ON
220V
240V
OFF
4
SW5
ON
220V
240V
OFF
4
LED NAME LED function in normal
LED1 UR Transmission Transmission of unit remote controller Blink
LED2
LED3 Main power source Power source supply (indoor unit 200V)
LED4 5V power source
UR Transmission
and reseption
Transmission and reseption of unit
remote controller
5V power source supply
LED5 Transmission power source Reception M-NET transmission power source
SWA1SWC
Blink
Light up
Light up
Light up
14
8
DISASSEMBLY PROCEDURE
OPERATING PROCEDURE PHOTOS
1.Removing the control box cover
(1) Remove the fixing screws (two) of the control box (A), and
remove the cover. (Fig. 1)
*At this stage, the following servicing is possible.
1 Operation and check of the switches (listed below) which
are on the control board.
• Dip switch SW2 • • • • • Capacity code setting
• Dip switch SW3 • • • • • Function change
• Dip switch SW4 • • • • • Model code setting
2 Operation and check of the switches (listed below) which
are on the adress board.
• Rotary switches SW11, 12 • •Address setting
• Rotary switch SW14 • • • • Branch port setting
• Dip switch SW1 • • • • • • • •Function change (main)
3 Connection check of the lead wires (listed below) which
are connected to the controller board.
• Power supply lead wire.
• Network remote contoller transmission lead wire.
• Fan motor lead wire.
• LEV lead wire
• Intake air sensor lead wire
• Liquid piping sensor lead wire
• Gas piping sensor lead wire
• Power supply transformer lead wire
• Address board lead wire
4 Control board exchange
5 Address board exchange
6 Condenser exchange
7 Power supply transformer exchange
8 Arrest exchange
9 Intake air sensor exchange
10 Power supply terminal bed exchange
11 Transmission terminal bed exchange
8-1. CONTROL BOX
Be careful on removing heavy parts.
fig.1
fig.2
(A)
15
OPERATING PROCEDURE PHOTOS
8-2. FAN and FAN MOTOR
Be careful on removing heavy parts.
fig.3
fig.5
1.Removing the fan casing and sirocco fan.
(1) Remove the bottom plate 1. (fixing screws : six) (Fig. 3)
(2) Remove the fixing screws (three) of the fan casing, and turn
it in direction of arrow. (Fig. 4)
(3) Remove the fixing screws (two) of the fan casing, and loosen
the set screw of the sirocco fan, and remove the fan casing
and sirocco fan. (Fig. 5)
2.Removing the fan motor.
(1) Remove the control box. (fixing screws : three) (Fig. 7)
(2) Move the control box to place that is not block operation.
(Fig. 8)
(3) Remove the fan motor cable connector in the control box,
and remove the screws of the motor support. (Fig. 9)
fig.7
fig.9
fig.4
fig.6
fig.8
c
Fan casing
Bottom plate1
Set screw
Fan motor
cable conne
16
fig.10
fig.11
8-3. DRAINPAN
OPERATING PROCEDURE PHOTOS
1.Removing the drainpan.
(1) Remove the fixing screw (one) of the drainpan.(Fig. 10).
(2) Slide the drainpan in the order of arrow ①,➁,③, and remove
the drainpan. (Fig. 11)
Be careful on removing heavy parts.
1
2
3
8-4.
LEV,THERMISTOR (Liquid/Gas piping temperature detection)
OPERATING PROCEDURE PHOTOS
1.Removing the LEV.
(1) Remove the drainpan with procedure 8-3.
(2) Remove the bottom plate 2 (fixing screws : six), and remove
the plate.(Fig. 12)
(3) Remove the LEV driving motor with a double spanner.(Fig.
13)
2.Removing the thermistors.
(1) Remove the thermistors from the thermistor holders which
are installed on the piping.(Fig. 14)
(liquid piping : fine piping , gas piping : thick piping)
fig.12
fig.13
fig.14
Be careful on removing heavy parts.
17
LEV
Thermistor
8-5. HEAT EXCHANGER
OPERATING PROCEDURE PHOTOS
1.Removing the heat exchanger.
(1) Remove the drainpan with procedure 8-3.
(2) Remove the bottom plate2 with procedure 8-4.
(3) Remove the heat exchanger cover.(fixing screws : four)
(Fig. 15)
(4) Remove the heat exchanger.(fixing screws : three)
(Fig. 16),(Fig. 17)
fig.15
fig16
fig.17
Be careful on removing heavy parts.
18
Heat exchanger
cover
19
8-6. CONTROL BOX INSIDE LAYOUT
8-7. SENSOR POSITION
Address board
SWA SWC SW5
SW14 SW12 SW1
SW1
CN82 CN62
Trans
FAN3
X06 X05
X04
LN
DSA board
CNDCNTCNP
Indoor unit
contoller board
12
Condenser
(for motor)
Transmission terminal bed
Power sourse
terminal bed
Gas sensor
Liquid sensor
HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Issued in May. 2001 MEE01K050
Printed in Japan
New publication, effective May. 2001
Specifications subject to change without notice
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