Download Mitsubishi Electric KA60VA Service manual

OC321A.qxp
06.8.28 3:45 PM
Page 1
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
September 2006
No.OC321
REVISED EDITION-B
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
Revision:
•RoHS PARTS LIST is added
in REVISED EDITION-B.
•Some descriptions have
been modified.
[Service Ref.]
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
SEZ-KA35VA
SEZ-KA50VA
SEZ-KA60VA
SEZ-KA71VA
•Please void OC321
REVISED EDITION-A.
Note:
• This manual describes only
service data of the indoor
units.When servicing outdoor units, please refer to
the service manual
No.OC322, OC323 together
with this manual.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing of RoHS
compliant products, refer
to the RoHS Parts List.
CONTENTS
Model name
indication
INDOOR UNIT
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
1. PART NAMES AND FUNCTIONS ········2
2. SPECIFICATIONS·································4
3. OUTLINES AND DIMENSIONS············9
4. WIRING DIAGRAM·····························10
5. REFRIGERANT SYSTEM DIAGRAM·······11
6. TROUBLESHOOTING ························12
7. DISASSEMBLY PROCEDURE···········22
8. PARTS LIST········································25
9. RoHS PARTS LIST·····························27
10. OPTIONAL PARTS·····························29
OC321A.qxp
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PART NAMES AND FUNCTIONS
Indoor Unit
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
Air outlet
Air outlet duct flange
Air inlet
(Selecting the either back side or bottom side)
Wired remote controller
Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
●
Operation buttons
Start/Stop button
Set Temperature buttons
Down
Fan Speed button
Up
Timer Menu button
(Monitor/Set button)
Filter
button
(<return sign> button)
Mode button (Return button)
TEMP.
ON/OFF
Set Time buttons
Service button (Clear button)
Back
Ahead
Test Run button
MENU
BACK
MONITOR/SET
ON/OFF
FILTER
DAY
CHECK TEST
Airflow Up/Down button
Timer On/Off button
(Set Day button)
PAR-21MAA
OPERATION
CLOCK
CLEAR
Louver button
Operation button)
(
To preceding operation
number
Opening the
door
Ventilation button
Operation button)
(
To next operation number
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● Display
“Sensor” indication
Displayed when the remote controller
sensor is used.
Day-of-Week
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
Shows the current day of the week.
Time/Timer Display
“Locked” indicator
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, shows the time
remaining.
Indicates that remote controller buttons have been locked.
Identifies the current operation
“Clean The Filter” indicator
Shows the operating mode, etc.
* Multilanguage display is supported.
Comes on when it is time to clean the
filter.
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
FUNCTION
FILTER
˚F˚C
“Centrally Controlled” indicator
Indicates that operation of the remote controller has been prohibited by a master controller.
Timer indicators
AFTER OFF
ERROR CODE
˚F˚C
The indicator comes on if the corresponding timer is set.
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
Fan Speed indicator
Shows the selected fan speed.
“Timer Is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Up/Down Air Direction indicator
Room Temperature display
Shows the room temperature.
The indicator
shows the direction of the outcoming airflow.
Louver display
“One Hour Only” indicator
Indicates the action of the swing
louver. Does not appear if the
louver is stationary.
Displayed if the airflow is set to
Low and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow direction also changes.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
(Power On indicator)
Indicates that the power is on.
Caution
● Only the Power on indicator lights when the unit is stopped and power supplied to the unit.
● If you press a button for a feature that is not installed in the indoor unit, the remote controller will display the “Not Available”
message.
If you are using the remote controller to operate multiple indoor units, this message will appear only if the feature is not
present at the parent unit.
● When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappears then start the operation.
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Page 4
SPECIFICATIONS
Indoor model
SEZ-KA35VA.TH
Function
Cooling
Electrical
data
Fan
motor
Special remarks
K /h
A
A
W
A(kW)
A
Winding
resistance (at20:)
"
Dimensions WoHoD
Weight
Air direction
Sound level (High/Low)
Fan speed (High/Low)
Fan speed regulator
External satatic pressure
Thermistor TH1 (at 25:)
Thermistor TH2 (at 25:)
Thermistor TH5 (at 25:)
mm
kg
dB(A)
rpm
Pa
k"
k"
k"
Cooling
Heating
Single phase
230V, 50Hz
780/600
10
0.40
60
—
0.22
PK6V19-EF
Power supply
Capacity Air flow (High/Low)
Power outlet
Running current ✽1
Power input Rated frequency
Auxiliary heater
Fan motor current ✽1
Model
SEZ-KA50VA.TH
Heating
Single phase
230V, 50Hz
1020/720
20
0.55
80
—
0.27
PK6V32-EF
WHT-BLK : 257 BLK-BLU : 20
BLU-YLW : 27
YLW-BRN : 14
BRN-RED : 51(at 26:)
1100o270o700
33.5
1
35/30
770/630
3
Std : 30 Max : 50
10
10
10
WHT-BLK : 166
BLK-BLU : 52
BLU-YLW : 19
YLW-BRN : 8
BRN-RED : 40(at 26:)
1100o270o700
33.5
1
39/31
840/640
3
Std : 30 Max : 50
10
10
10
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor D.B. 27: W.B. 19:
Outdoor D.B. 35: W.B. 24:
Heating : Indoor D.B. 20: W.B. 15:
Outdoor D.B. 7: W.B. 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
Specifications and rating conditions of main electric parts
INDOOR UNIT
Item
Model
Indoor fan capacitor
Fuse
(C1)
SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH
SEZ-KA35/50VA.TH : 2.5+ 440V SEZ-KA60VA.TH : 3.0+ 440V SEZ-KA71VA.TH : 4.0+ 440V
(FUSE)
Varistor
Terminal block
250V 6.3A
(ZNR)
(TB)
ERZV10D471
TO OUTDOOR UNIT : 3P
Indoor fan motor thermal fuse
TO WIRED REMOTE CONTROLLER : 2P
141:i3:
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Page 5
Indoor model
SEZ-KA60VA.TH
Function
Cooling
Power supply
Fan
motor
Electrical
data
Capacity Air flow (High/Low)
Power outlet
Running current ✽1
Power input Rated frequency
Auxiliary heater
Fan motor current ✽1
Model
Special remarks
OC321A.qxp
Winding
resistance
Dimensions WoHoD
Weight
Air direction
Sound level(High/Low)
Fan speed(High/Low)
Fan speed regulator
External satatic pressure
Thermistor TH1 (at 25:)
Thermistor TH2 (at 25:)
Thermistor TH5 (at 25:)
K /h
A
A
W
A(kW)
A
"
mm
kg
dB(A)
rpm
Pa
k"
k"
k"
Heating
Single phase
230V, 50Hz
1200/720
20
0.65
100
—
0.39
PK6V50-EF
WHT-BLK : 103
BLK-BLU : 57
BLU-YLW : 15
YLW-BRN : 7
BRN-RED : 29 (at 26:)
1100o270o700
33.5
1
43/32
890/660
3
Std : 30 Max : 50
10
10
10
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor D.B. 27: W.B. 19:
Outdoor D.B. 35: W.B. 24:
Heating : Indoor D.B. 20: W.B. 15:
Outdoor D.B. 7: W.B. 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
5
SEZ-KA71VA.TH
Cooling
Heating
Single phase
230V, 50Hz
1200/720
20
0.60
130
—
0.51
PK4V60-EA
WHT-BLK : 108
BLK-BLU : 29
BLU-YLW : 26
YLW-BRN : 14
BRN-RED : 34 (at 26:)
1100o270o700
35
1
43/32
1050/690
3
Std : 30 Max : 50
10
10
10
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Page 6
NOISE CRITERION CURVES
<50Hz>
<50Hz>
SEZ-KA35VA.TH
NOTCH SPL(dB)
High
35
Low
30
LINE
SEZ-KA50VA.TH
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
LINE
90
90
20
NOTCH SPL(dB)
High
39
Low
31
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-20
10
10
63
125
250
500
1000
2000
4000
63
8000
125
250
500
1000
2000
4000
8000
BAND CENTER FREQUENCIES, Hz
BAND CENTER FREQUENCIES, Hz
<50Hz>
SEZ-KA60VA.TH
SEZ-KA71VA.TH
NOTCH SPL(dB)
High
43
Low
32
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
90
UNIT
80
70
NC-70
60
NC-60
External static
pressure 30Pa
1.5m
50
NC-50
MICROPHONE
40
NC-40
30
NC-30
20
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-20
10
63
125
250
500
1000
2000
4000
8000
BAND CENTER FREQUENCIES, Hz
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level
can be higher by about 2 dB than the displayed level during cooling and heating operation.
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Page 7
INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW
SEZ-KA35VA.TH
Corrected Air flow
Capacity
Input
Cooling
1.1
Correction factor
Fan Performance
Recommended range
60
0.9
0.8
1.3
40
20
0
1.0
5
10
15
20
25
20
25
Air flow (K/X)
Correction factor
External static pressure(Pa)
(1Pa = 0.1mmAq)
80
5 7
10
15
20
25
Heating
1.2
1.1
1.0
0.9
Air flow (K/X)
0.8
5
10
15
Air flow (K/X)
SEZ-KA50VA.TH
Corrected Airflow
Capacity
Input
Cooling
Fan Performance
Correction factor
1.1
Recommended range
80
60
1.0
0.9
0.8
5
10
15
20
25
20
25
Air flow (K/X)
40
1.2
0
Heating
1.1
20
5
10
15
20
Correction factor
External static pressure(Pa)
(1Pa = 0.1mmAq)
OC321A.qxp
25
Air flow (K/X)
1.0
0.9
0.8
5
10
15
Air flow (K/X)
7
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Page 8
INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW
SEZ-KA60VA.TH
Corrected Air flow
Capacity
Input
Cooling
1.1
Correction factor
Fan Performance
Recommended range
60
0.9
0.8
10
15
20
25
30
25
30
Air flow (K/X)
40
1.3
Correction factor
External static pressure(Pa)
(1Pa = 0.1mmAq)
80
1.0
20
0
5
10
15
20
25
Air flow (K/X)
Heating
1.2
1.1
1.0
0.9
10
15
20
Air flow (K/X)
SEZ-KA71VA.TH
Corrected Air flow
Capacity
Input
Cooling
1.1
Correction factor
Fan Performance
Recommended range
60
1.0
0.9
0.8
10
15
20
25
30
25
30
Air flow (K/X)
40
1.3
Correction factor
External static pressure(Pa)
(1Pa = 0.1mmAq)
80
20
0
5
10
15
20
25
Air flow (K/X)
Heating
1.2
1.1
1.0
0.9
10
15
20
Air flow (K/X)
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Page 9
OUTLINES AND DIMENSIONS
Unit : mm
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
Air inlet (bottom side) dimensions
930
215
77
39 77.5 100
7x100=700
(Inlet size)
Electrical parts box
930
(Inlet size)
215
Select the either
back side or bottom side.
51
450
955
50
w
Air inlet
(rear side)
150
25
1016
240
27
50
PLATE (B) x 2
120
24-{2.9 holes
150
7x100=700
955
77.5 100
25
120
12.5
240
(Inlet size)
29
PLATE (A)
After installation, remove the
transportation support PLATE (B).
12.5
42
In case of bottom side suction,
mount the PLATE (A) on the rear side.
(Inlet size)
Air inlet (rear side) dimensions
Access door
bolt pitch
(10)
680
60 38
350
50 Suspension
700
600
24-{2.9 holes
1000
Service space
(It is necessary to maintain a working
service area from the ceiling.)
40
50
100
7x100=700
880
9 x 2-{2.9 holes
Air outlet duct flange
Air outlet
1070
Suspension bolt pitch
50
Wiring entry
20
32.5
100
(10)
Terminal block
Electrical parts box
Air inlet
(bottom side)
Access door
Air outlet duct flange
94
25
80
Electrical parts box
Drain plug R1 (male)
350
Select the either back side or bottom side.
Models
SEZ-KA35VA
SEZ-KA50VA
SEZ-KA60VA
SEZ-KA71VA
9
108
75
2x2-{2.9
holes
1100
w
25
Refrigerent pipe (liquid)
170
(Suspension bolt pitch)
Refrigerent pipe (gas)
20 or more
(1070)
30
Suspension bolt
M10 or 3/8
(procure locally)
270
OC321A.qxp
Refrigerent pipe
(liquid)
Refrigerent pipe
(gas)
{6.35mm
{9.52mm
flared connection
1/4F
{6.35mm
flared connection
1/4F
{6.35mm
flared connection
1/4F
{9.52mm
flared connection
3/8F
flared connection
3/8F
{12.7mm
flared connection
1/2F
{15.88mm
flared connection
5/8F
{15.88mm
flared connection
5/8F
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Page 10
WIRING DIAGRAM
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
MF
TB4
BRN
3
4
5
6
7
8
TO OUTDOOR
UNIT
1
2
3
4
5
6
7
8
BLU
2
YLW
1
ORN
C1
BLU
YLW
BLK
RED
WHT
ORN
S1
S2
S3
RED
P.B
1 2 3 AC220-240V
CNSK(RED)
KA60
ON
OFF
KA71
ON
OFF
12345
2
3
4
5
6
12345
ORN
BLU
3
BLU
1
WHT
(FAN)
FAN
7
RED
WHT
KA50
ON
OFF
1
RED
ON
OFF
BRN
SW2
KA35
BLU
BLK
MODELS
WHT
<fig:w1>
RED
1
(POWER
BOARD)
CNDK
FUSE
ORN
(POWER)
CND
3
1
I.B
TRANS
3
BLU
(CONTROL)
CN3C
1 2 DC13.1V
CN2S(WHT)
12345
X6
X5
ZNR
X4
12345
X6
WHT
(POWER
BOARD)
CN2D
X4
SW3
ON
OFF
1
2
BLK
WHT
LED3
12345
LED1
CN2L
BLK
RED
(2 PHASE) (INTAKE)
CN20
CN29
ON
OFF
12345
1
2
1
2
CN90
CN41
CN51
CN32
See fig:w1
LED2
WHT
(LIQUID)
CN21
1
2
BLU
(REMOCON)
CN22
1
2
BLU
SW2
BLU
SWE
ON
OFF
X5
TB15
1
2
TH5
[LEGEND]
SYMBOL
P.B
NAME
INDOOR POWER BOARD
I.B
SYMBOL
C1
NAME
CAPACITOR(FAN MOTOR)
INDOOR CONTROLLER BOARD
MF
FAN MOTOR
CN2L
CONNECTOR(LOSSNAY)
TB4
TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE)
CN32
CONNECTOR(REMOTE SWITCH)
CN41
CONNECTOR(HA TERMINAL-A)
CN51
CENTRALLY CONTROL
CN90
CONNECTOR(WIRELESS)
FUSE
FUSE(T6.3AL250V)
LED1
POWER SUPPLY(I.B)
LED2
POWER SUPPLY(I.B)
LED3
TRANSMISSION(INDOOR-OUTDOOR)
SW2
SWITCH(CAPACITY CODE)
SW3
SWITCH(MODE SELECTION)
SWE
SWITCH(EMERGENCY OPERATION)
X4
RELAY(FAN MOTOR LL)
X5
RELAY(FAN MOTOR Lo)
X6
RELAY(FAN MOTOR Hi)
ZNR
VARISTOR
TERMINAL BLOCK(REMOTE CONTROLLER
TB15
TRANSMISSION LINE)
ROOM TEMP.THERMISTOR
TH1
(0°C/15kΩ,25°C/5.4kΩ DETECT)
PIPE TEMP.THERMISTOR/LIQUID
TH2
(0°C/15kΩ,25°C/5.4kΩ DETECT)
COND./EVA.TEMP.THERMISTOR
TH5
(0°C/15kΩ,25°C/5.4kΩ DETECT)
NOTES: 1.Since the outdoor side electric wiring may change be sure to
check the outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities,make
wiring matching terminal numbers(S1,S2,S3).
3.Symbols used in wiring diagram above are,
:Connector,
:Terminal(block).
4.Since the indoor fan motor(MF) is connected with 50Hz power,
if 60Hz power is used, change the wiring connection shown in
fig:w2.
<fig:w2>
Indoor Fan Motor(MF)
for 60Hz
BLUE
50
YELLOW
60
BLUE
wFor details on how to operate self-diagnosis,
refer to the technical manuals etc.
10
TH1
TH2
}
TO MA-REMOTE
CONTROLLER
DC8.7-13V
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Page 11
REFRIGERANT SYSTEM DIAGRAM
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
Strainer
#50
Heat exchanger
Refrigerant GAS pipe connection
(Flare)
Condenser/evaporator
temperature thermistor
(TH5)
Refrigerant flow in cooling
Refrigerant flow in heating
Refrigerant LIQUID pipe connection
(Flare)
Pipe temperature
thermistor/liquid
(TH2)
Room temperature
thermistor (TH1)
Distributor
with strainer
#50
Strainer
#50
11
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Page 19
6-5. TEST POINT DIAGRAM
6-5-1. Indoor power board
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
CN2S
Connect to the indoor controller board (CN2D)
1 (+))
between 1 to 3 12.6-13.7V DC (Pin1
CNSK
Connect to the indoor controller board
(CNDK)
between 1 to 3 220-240V AC
19
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Page 20
6-5-2. Indoor controller board
LED1
Power supply LED2
Power supply
(I.B)
(R.B)
LED3
Transmission
(Indoor/outdoor)
}
–
+
CN3C
Transmission
(Indoor/outdoor)
(0~24V DC)
CN2D
Connector to the indoor
power board (CN2S)
(12.5~13.7V DC)
+
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
Non polarity
–
CND
Power
supply input
(220~240V AC)
CN22
Remote controller
connecting wire
(10.4~14.6V DC)
CN20
Room temperature
thermistor (TH1)
}
CN21
Pipe temperature
thermistor/Liquid
(TH2)
FUSE
(6.3A 250V)
CNDK
Connect to the indoor
power board (CNSK)
(220~240V AC)
CN29
Condenser/evaporator
temperature thermistor
(TH5)
CN41
Connector
(HA terminal-A)
CN51
Centrally control
CN2L
Connector
(LOSSNAY)
FAN
Fan motor output
Jumper connector
J11~J15
Unit setting
SW3
SWE
Mode selection Emergency operation
20
SW2
Capacity setting
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Page 21
6-6. TROUBLE CRITERION OF MAIN PARTS
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
Part name
Check method and criterion
Room temperature
thermistor
(TH1)
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Pipe temperature
thermistor/liquid
(TH2)
Condenser/evaporator
temperature thermistor
(TH5)
Normal
Abnormal
8kΩ~20kΩ
Opened or short-circuited
Measure the resistance between the terminals with a tester.
(Coil wiring temperature 10°C ~ 30°C)
Indoor fan motor
(MF)
Normal
P
BLK BLU YLW BRN RED ORN
WHT
P : Thermal fuse
KA35VA
KA50VA
KA60VA
KA71VA
GRN
WHT-BLK
270~244Ω
157~175Ω
97~109Ω
103~113Ω
YLW
BLK-BLU
19~21Ω
49~55Ω
54~60Ω
28~30Ω
BLU-YLW
25~29Ω
18~20Ω
14~16Ω
25~27Ω
YLW-BRN
13~15Ω
7~9Ω
6~8Ω
13~15Ω
BRN-RED
48~54Ω
38~42Ω
27~31Ω
32~36Ω
141 ± 3˚C
21
Abnormal
Opened or
short-circuited
OC321A.qxp
7
06.8.28 3:45 PM
Page 22
DISASSEMBLY PROCEDURE
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
OPERATING PROCEDURE
PHOTOS
1. Removing the electrical parts
(1) Remove 2 screws of electrical cover and electrical parts
cover.
(See Photo 1)
● Indoor controller board (I.B)
● Terminal block (TB4,TB15)
● Indoor power board (P.B)
● Fan motor capacitor (C1)
(See Photo 2)
Photo 1
Service panel
(Pipe temperature
thermistor / liquid)
Electrical
parts cover
Drain
pan
Set screws
Service panel
Front panel
Set screws
(Condenser / evaporator
temperature thermistor) (for drain pan)
2. Removing the pipe temperature thermistor (TH2)
Photo 2
Terminal
Terminal
block (TB15) block (TB4)
Indoor
controller box
(1) Remove the electrical parts cover. (Refer to 1)
(2) Remove 2 screws of service panel and service panel.
(See Photo 3)
(3) Remove the thermistor (TH2) from the holder.
(See Photo 4)
(4) Remove the connector (CN21) from the indoor
controller board and pull the white wire of thermistor
(TH2) out.
Fan motor
capacitor
3. Removing the condenser / evaporator temperature
thermistor (TH5)
(1) Remove the electrical parts cover. (Refer to 1)
(2) Remove the service panel. (See Photo 3)
(3) Remove the thermistor (TH5) from the holder.
(See Photo 4)
(4) Remove the connector (CN29) from the indoor
controller board and pull the black wire of thermistor
(TH5) out.
Indoor controller board
Indoor power board
Photo 4
Photo 3
Screws
Pipe temperature
thermistor / liquid
(TH2)
Service
panel
Screws
22
Condenser / evaporator
temperature thermistor (TH5)
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Page 23
PHOTOS
OPERATING PROCEDURE
4. Removing the room temperature thermistor (TH1)
Photo 5
(1) Remove the electrical parts cover. (Refer to 1)
(2) Remove 12 screws of front panel and the front panel at
fan side.
(See Photo 1)
(3) Remove the thermistor (TH1) from the separator panel.
(See Photo 6)
(4) Disconnect the connector (CN20)from the indoor
controller board and pull the lead wire of
thermistor (TH1) out.
Claws
Claws
Photo 6
Motor bands
Screws
Room temperature
thermistor (TH1)
5. Removing the sirocco fan and the fan motor (MF).
(1) Remove the electrical parts cover. (Refer to 1)
(2) Remove 12 screws of front panel and the front panel
at fan side. (See Photo 1)
(3) Disconnect the connector of the fan motor lead wire.
(See Photo 2)
(4) Undo the 4 claws and remove the fan claws.(down side)
<Either left or right> (See Photo 5)
(5) Remove the motor bands.
<A screw each on left and right.> (See Photo 5)
(6) Disconnect the earth wire from the fan motor leg.
(See Photo 7)
(7) Remove the fan motor and the sirocco fan by assembly.
(See Photo 7)
(8) Unscrew set screw and remove the sirocco fan.
<Either left or right> (See Photo 7)
Photo 7
Set screw
Earth wire
23
Fan motor
Separator
panel
Fan casing
Fan motor
Fan casing
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06.8.28 3:45 PM
Page 24
PHOTOS
OPERATING PROCEDURE
6. Removing the drain pan
(1) Unscrew each set screw on the right and left, and
remove the drain pan pushing it toward the the back.
(See Photo 1)
Photo 8
Screws
7. Removing the heat exchanger
(1) Remove the drain pan. (Refer to 6)
(2) Remove the 16 screws and the Under flange at heat
exchanger side. (See Photo 8)
(3) Remove the 4 screws of heat exchanger.( 2 screws
each on left and right) (See Photo 9)
(4) Remove the thermistor (TH2) from the holder.
(Refer to 2)
(5) Remove the thermistor (TH5) from the holder.
(Refer to 3)
(6) Remove the 3 screws and the service panel.
(See Photo 9)
(7) Put the heat exchanger down to the fan motor and
pull it toward you.
(See Photo 9)
Under flange
Photo 9
Screws
for heat exchanger
Service
panel
Heat exchanger
24
Screws
for service panel
OC321A.qxp
06.8.28 3:45 PM
8
Page 25
PARTS LIST (non-RoHS compliant)
INDOOR UNIT
STRUCTURAL PARTS
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
15
14
12
13
11
1
10
2
3
9
8
7
4
6
5
Q'ty/set
No.
Parts No.
Parts name
Specification
SEZ-KA·VA.TH
35
50
60
71
1 E07 039 086 LEFT SIDE PANEL
1
1
1
1
2 E07 039 500 SIROCCO FAN
2
2
2
2
3 E02 179 505 FAN MOTOR RUBBER MOUNT
2
2
2
2
E07 039 300 FAN MOTOR
4
E07 040 300 FAN MOTOR
PK6V19-EF
1
PK6V50-EF
E07 223 300 FAN MOTOR
PK4V60-EA
<2PCS/SET>
MF
1
PK6V32-EF
E07 041 300 FAN MOTOR
Price
Wiring RecomRemarks Diagram mended
(Drawing No.) Symbol Q'ty Unit Amount
MF
1
MF
1
MF
TH1
5 E07 159 308 ROOM TEMPERATURE THERMISTOR
1
1
1
1
6 E07 039 000 FRONT PANEL
1
1
1
1
7 E07 039 700 DRAIN PAN
1
1
1
1
CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR
1
1
1
1
TH5
9 E07 159 307 PIPE TEMPERATURE THERMISTOR / LIQUID
1
1
1
1
TH2
8 E07 154 309
E07 143 620 INDOOR HEAT EXCHANGER
10
1
E07 144 620 INDOOR HEAT EXCHANGER
1
E07 145 620 INDOOR HEAT EXCHANGER
1
E07 223 620 INDOOR HEAT EXCHANGER
1
11 E07 039 808 RIGHT LEG
2
2
2
2
12 E07 143 085 RIGHT SIDE PANEL
1
1
1
1
13 E07 143 293 SEPARATOR ASSY
1
1
1
1
14 E07 039 809 LEFT LEG
2
2
2
2
15 E07 039 290 BASE
1
1
1
1
25
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06.8.28 3:45 PM
Page 26
INDOOR UNIT
ELECTRICAL PARTS
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
6
5
TEMP.
ON/OFF
1
2
TO REMOTE
CONTROLLER
7
8
S1
S2
TO OUTDOOR
UNIT
4
S3
9
3
1
2
Part numbers that is circled is not shown in the figure.
Q'ty/set
No.
Parts No.
Parts name
Specification
SEZ-KA·VA.TH
35
E07 159 447 INDOOR CONTROLLER BOARD
1
50
60
1
E07 160 447 INDOOR CONTROLLER BOARD
I.B
1
E07 161 447 INDOOR CONTROLLER BOARD
I.B
1
E07 223 447 INDOOR CONTROLLER BOARD
2 E02 661 385 VARISTOR
3 E07 006 382 FUSE
71
250V/6.3A
4 E07 154 440 INDOOR POWER BOARD
E02 063 351 FAN MOTOR CAPACITOR 2.5+/440VAC
Price
Wiring RecomRemarks Diagram mended
Unit Amount
(Drawing No.) Symbol Q'ty
I.B
1
I.B
1
1
1
1
ZNR
1
1
1
1
FUSE
1
1
1
1
P.B
1
1
5 E02 138 351 FAN MOTOR CAPACITOR 3.0+/440VAC
C1
1
E02 064 351 FAN MOTOR CAPACITOR 4.0+/440VAC
C1
1
C1
6 E07 156 375 TERMINAL BLOCK
2P
1
1
1
1
TB15
7 E07 162 375 TERMINAL BLOCK
3P
1
1
1
1
TB4
8 E07 159 426 REMOTE CONTROLLER
1
1
1
1
R.B
9 E07 018 089 REMOTE CONTROLLER CABLE
1
1
1
1
10 E07 039 449 CONTROLLER COVER
1
1
1
1
26
06.8.28 3:45 PM
9
Page 27
RoHS PARTS LIST
INDOOR UNIT
STRUCTURAL PARTS
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
15
14
12
13
11
1
10
2
3
9
8
7
No.
6
5
4
RoHS
OC321A.qxp
Q'ty/set
Parts No.
Parts name
Specification
SEZ-KA·VA.TH
35
50
60
71
1 G E17 039 086 LEFT SIDE PANEL
1
1
1
1
2 G E17 039 500 SIROCCO FAN
2
2
2
2
3 G E12 179 505 FAN MOTOR RUBBER MOUNT
2
2
2
2
4
G E17 039 300 FAN MOTOR
PK6V19-EF
G E17 040 300 FAN MOTOR
PK6V32-EF
G E17 041 300 FAN MOTOR
PK6V50-EF
G E17 223 300 FAN MOTOR
PK4V60-EA
1
1
MF
1
MF
1
1
TH1
1
1
1
1
1
1
1
1
1
1
TH5
1
1
1
1
TH2
1
1
1
7 G E17 039 700 DRAIN PAN
1
CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR
9 G E17 159 307 PIPE TEMPERATURE THERMISTOR / LIQUID
10
MF
1
6 G E17 039 000 FRONT PANEL
G E17 143 620 INDOOR HEAT EXCHANGER
<2PCS/SET>
MF
5 G E17 159 308 ROOM TEMPERATURE THERMISTOR
8 G E17 154 309
Price
Wiring RecomRemarks Diagram mended
(Drawing No.) Symbol Q'ty Unit Amount
1
G E17 144 620 INDOOR HEAT EXCHANGER
1
G E17 145 620 INDOOR HEAT EXCHANGER
1
G E17 223 620 INDOOR HEAT EXCHANGER
1
11 G E17 039 808 RIGHT LEG
2
2
2
2
12 G E17 143 085 RIGHT SIDE PANEL
1
1
1
1
13 G E17 143 293 SEPARATOR ASSY
1
1
1
1
14 G E17 039 809 LEFT LEG
2
2
2
2
15 G E17 039 290 BASE
1
1
1
1
27
OC321A.qxp
06.8.28 3:45 PM
Page 28
INDOOR UNIT
ELECTRICAL PARTS
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
6
5
TEMP.
ON/OFF
1
2
TO REMOTE
CONTROLLER
7
8
S1
S2
TO OUTDOOR
UNIT
4
S3
9
3
1
2
No.
RoHS
Part numbers that is circled is not shown in the figure.
Q'ty/set
Parts No.
Parts name
Specification
35
G E17 159 447 INDOOR CONTROLLER BOARD
1
SEZ-KA·VA.TH
50
60
G E17 160 447 INDOOR CONTROLLER BOARD
I.B
1
G E17 161 447 INDOOR CONTROLLER BOARD
I.B
1
G E17 223 447 INDOOR CONTROLLER BOARD
2 G E12 661 385 VARISTOR
3 G E17 006 382 FUSE
71
1
250V/6.3A
4 G E17 154 440 INDOOR POWER BOARD
G E12 063 351 FAN MOTOR CAPACITOR 2.5+/440VAC
Price
Wiring RecomRemarks Diagram mended
Unit Amount
(Drawing No.) Symbol Q'ty
I.B
1
I.B
1
1
1
1
ZNR
1
1
1
1
FUSE
1
1
1
1
P.B
1
1
5 G E12 138 351 FAN MOTOR CAPACITOR 3.0+/440VAC
C1
1
G E12 064 351 FAN MOTOR CAPACITOR 4.0+/440VAC
C1
1
C1
6 G E17 156 375 TERMINAL BLOCK
2P
1
1
1
1
TB15
7 G E17 162 375 TERMINAL BLOCK
3P
1
1
1
1
TB4
8 G E17 159 426 REMOTE CONTROLLER
1
1
1
1
R.B
9 G E17 018 089 REMOTE CONTROLLER CABLE
1
1
1
1
10 G E17 039 449 CONTROLLER COVER
1
1
1
1
28
OC321A.qxp
06.8.28 3:45 PM
10
Page 29
OPTIONAL PARTS
AIR FILTER
Models
Applied unit
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
PAC - 1000 FT
29
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Page 30
30
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Page 31
31
OC321A.qxp
06.8.28 3:45 PM
Page 32
TM
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Sep. 2006 No.OC321 REVISED EDITION-B PDF 7
Distributed in Oct. 2005 No.OC321 REVISED EDITION-A PDF 8
Distributed in Feb. 2005 No.OC321 PDF 8
Made in Japan
New publication, effective Sep. 2006
Specifications subject to change without notice.