Mitsubishi SEZ-KA35VA.TH Operating manual

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R410A Ceiling Concealed Ducted System
SEZ-KA60VA Indoor Unit
Capacity (kW):
Heating (Nominal) (Low
- High) 6.90 (0.90 - 8.00)
Cooling (Nominal) (Low
- High) 5.50 (1.10 - 6.30)
Heating (UK) (Low -
High) 5.75 (0.75 - 6.65)
Cooling (UK) (Low -
High) 5.45 (1.10 - 6.25)
SHF R410A (Nominal) 0.75
COP / EER (Nominal) 2.82 / 2.81
Energy Label Heating /
Cooling C / D
Width - mm 1100
Depth - mm 700
Height - mm 270
Weight - kg 33.5
Airflow (m3/min)
(Heating / Cooling) -
Lo-Hi 12-20 / 12-20
SEZ-KA60VAInverter Heat Pump
Designed for homes, offices, restaurants or shops, the SEZ series operates at
low noise levels and is virtually invisible when installed within a suspended
ceiling. Its low unit height and lightweight design also helps to make
installation easier and more convenient.
Hover your mouse over the red icons below to view a description of each feature:
Model Info
[Print]
[Print]
Dimensions
SEZ-KA60VA (Click to
enlarge).
SUZ-KA60VA (Click to
enlarge).

External Static
Pressure Pa(mmAq) -
Lo-Hi 30(3)-50(5)
Noise (dBA) (Heating /
Cooling) - Lo-Hi 32-43 / 32-43
Pipe Size Gas mm (in) 15.88 (5/8)
Pipe Size Liquid mm
(in) 6.35 (1/4)
Electrical Supply Fed by Outdoor Unit
Phase Single
Fuse Rating (BS88) -
HRC (A) 6
Interconnecting Cable
No. Cores 4
Remote Controller Ref PAR-21MAA
SUZ-KA60VA Outdoor Unit
Width - mm 840
Depth - mm 330
Height - mm 850
Weight - kg 53
Noise (dBA) (Heating /
Cooling) 52 / 52
Electrical Supply 220-240v, 50Hz
Phase Single
Fuse Rating (BS88) - HRC
(A) 25
System Power Input (kW) -
Heating (Nominal) 2.45
System Power Input (kW) -
Cooling (Nominal) 1.96
System Power Input (kW) -
Heating (UK) 2.23
System Power Input (kW) -
Cooling (UK) 1.57
Starting Current (A) 10.4
System Running Current
(A) - Heating / Cooling 10.4 / 9
Mains Cable No. Cores 3
Max Pipe Length (m) 30
Max Height Difference (m) 15
Charge (kg) - 7m 1.8

TECHNICAL & SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS········2
2. SPECIFICATIONS·································4
3. OUTLINES AND DIMENSIONS············8
4. WIRING DIAGRAM·······························9
5. REFRIGERANT SYSTEM DIAGRAM ······10
6. TROUBLESHOOTING························11
7. DISASSEMBLY PROCEDURE···········15
8. PARTS LIST········································18
9. OPTIONAL PARTS·············Back Cover
INDOOR UNIT
Indoor unit
[Model names] [Service Ref.]
SEZ-KA35VA SEZ-KA35VA.TH
SEZ-KA50VA SEZ-KA50VA.TH
SEZ-KA60VA SEZ-KA60VA.TH
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
WIRED REMOTE
CONTROLLER
ON/OFF
TEMP.
Model name
indication
No.OC321
Note :
•This manual does not cover
outdoor units. When servicing
outdoor units, please refer
to the service manual
No.OC322 together with this
manual.
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2
1PART NAMES AND FUNCTIONS
Indoor Unit
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
Air outlet duct flange
Air outlet
Air inlet
(Selecting the either back side or bottom side)
● Operation buttons
On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
Wired remote controller
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Set Temperature buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
door.
Start/Stop button
Fan Speed button
Filter button
(<return sign> button)
Test Run button
Service button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To preceding operation
number.
Ventilation button
(Operation button)
To next operation number.
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3
●Display
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
˚F˚C
˚F˚C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is sup-
ported.
“Centrally Controlled” indicator
Indicates that operation of the re-
mote controller has been prohib-
ited by a master controller.
“Timer Is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
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.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
Comes on when it is time to clean the
filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Displayed if the airflow is set to
weak and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di-
rection also changes.
Room Temperature display
Shows the room temperature.
Louver display
Indicates the action of the swing
louver. Does not appear if the
louver is stationary.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●When power is turned ON for the first time the (Centrally controlled) display appears to go off momentarily but this is not a
malfunction.
●“NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped
with the fan direction adjustment function and the louver function.
●When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica-
tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.
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4
2SPECIFICATIONS
SEZ-KA35VA.TH SEZ-KA50VA.TH
Indoor model
Function
Power supply Single phase
230V, 50Hz
780/600
10
0.40
60
—
0.22
PK6V19-EF
1100o270o700
33.5
1
35/30
770/630
3
Std : 30 Max : 50
10
10
10
Cooling
93
Heating
94
Single phase
230V, 50Hz
1020/720
20
0.55
80
—
0.27
PK6V32-EF
1100o270o700
33.5
1
39/31
840/640
3
Std : 30 Max : 50
10
10
10
Cooling
97
Heating
98
Air flow (High/Low)
Power outlet
Running current ✽1
Power input Rated frequency
Auxiliary heater
Power factor ✽1
Fan motor current ✽1
Model
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:)
K/h
A
A
W
A(kW)
%
A
"
mm
kg
dB(A)
rpm
Pa
k"
k"
k"
Electrical data
Fan motor
Special remarks
Capacity
WHT-BLK : 257 BLK-BLU : 20
BLU-YLW : 27 YLW-BRN : 14
BRN-RED : 51
WHT-BLK : 166 BLK-BLU : 52
BLU-YLW : 19 YLW-BRN : 8
BRN-RED : 40
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. 5:
Outdoor D.B. 7:W.B. 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
SEZ-KA35/50VA.TH : 2.5+ 440V SEZ-KA60VA.TH : 3.0+ 440V
250V 6.3A
ERZV10D471
TO OUTDOOR UNIT : 3P TO WIRED REMOTE CONTROLLER : 2P
145:i2:
INDOOR UNIT
Item Model
Indoor fan capacitor
Fuse
Varistor
Terminal block
Indoor fan motor thermal fuse
SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH
(C1)
(FUSE)
(ZNR)
(TB)
Specifications and rating conditions of main electric parts
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5
SEZ-KA60VA.TH
Indoor model
Function
Power supply Single phase
230V, 50Hz
1200/720
20
0.65
100
—
0.39
PK6V50-EF
1100o270o700
33.5
1
43/32
890/660
3
Std : 30 Max : 50
10
10
10
Cooling
98
Heating
98
Air flow (High/Low)
Power outlet
Running current ✽1
Power input Rated frequency
Auxiliary heater
Power factor ✽1
Fan motor current ✽1
Model
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:)
K/h
A
A
W
A(kW)
%
A
"
mm
kg
dB(A)
rpm
Pa
k"
k"
k"
Electrical data
Fan motor
Special remarks
Capacity
WHT-BLK : 103 BLK-BLU : 57
BLU-YLW : 15 YLW-BRN : 7
BRN-RED : 29
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.
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6
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KA50VA.TH High
Low 39
SPL(dB)
31
LINE
<50Hz>
NOTCH
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KA35VA.TH High
Low 35
SPL(dB)
30
LINE
<50Hz>
NOTCH
NOISE CRITERION CURVES
UNIT
External static
pressure 30Pa 1.5m
MICROPHONE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
SEZ-KA60VA.TH High
Low 43
SPL(dB)
32
LINE
<50Hz>
NOTCH
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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7
Air flow (K/X)
Recommended range
80
60
40
20
0105 7 15 20 25
External static pressure(Pa) (1Pa = 0.1mmAq)
Fan Performance
Air flow (K/X)
Recommended range
80
60
40
20
0155 10 20 25
External static pressure(Pa) (1Pa = 0.1mmAq)
Fan Performance
Air flow (K/X)
Recommended range
80
60
40
20
0155 10 20 25
External static pressure(Pa) (1Pa = 0.1mmAq)
Fan Performance
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA35VA.TH Corrected Air flow
1.1
0.9
1.0
0.8 105 15 20
Correction factor
Capacity
Input
Cooling
Air flow (K/X)
Corrected Airflow
1.1
0.9
1.0
0.8 5 10 15 20 25
Correction factor
Capacity
Input
Cooling
Air flow (K/X)
Corrected Air flow
1.1
0.9
1.0
0.8 10 15 20 25 30
Correction factor
Capacity
Input
Cooling
Air flow (K/X)
0.9
1.0
1.2
1.1
1.3
10 15 20 25 30
Correction factor
Heating
Air flow (K/X)
1.0
1.1
1.2
0.8
0.9
5 10 15 20 25
Correction factor
Heating
Air flow (K/X)
1.0
1.2
1.3
1.1
0.8
0.9
5 10 15 20
Correction factor
Heating
Air flow (K/X)
25
25
INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW
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8
OUTLINES AND DIMENSIONS
3
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
Unit : mm
(10) 50
50 880
7x100=700
100
40
9 x 2-{2.9 holes
1000
50
38
60
680
350
Suspension bolt pitch
In case of bottom side suction,
mount the PLATE (A) on the rear side.
Air inlet (rear side) dimensions
240
1016
42 930
back side or bottom side.
29 955
7x100=700
100
77.5
12012.5
(Inlet size)
24-{2.9 holes
5027
Air inlet
(rear side)
Air outlet duct flange
120
12.5 240
(It is necessary to maintain a working
service area from the ceiling.)
150
32.5
25
(10) 50
77
600
700
Access door
Service space
Air outlet
Suspension bolt pitch
1070
(Suspension bolt pitch)
Electrical parts box
(1070)
20 or more30
20
PLATE (B) x2
After installation, remove the
transportation support PLATE (B).
25 (Inlet size)
215
450150 Electrical parts box
wSelect the either
SEZ-KA60VA
SEZ-KA50VA
Terminal block
3/8F
flared connection
{9.52mm
{6.35mm
flared connection
1/4F
Air outlet duct flange
51
25
930
(Inlet size)
39
955
7x100=700
100
77.5
(Inlet size)
215
Air inlet (bottom side) dimensions
24-{2.9 holes
flared connection
{6.35mm
Electrical parts box
2x2-{2.9
holes
flared connection
{15.88mm
5/8F
flared connection
1/2F
{12.7mm
Refrigerent pipe
(gas)
Refrigerent pipe
(liquid)
1/4F
flared connection
{6.35mm
SEZ-KA35VA
Models
Wiring entry
Refrigerent pipe (liquid)
Refrigerent pipe (gas)
Drain plug R1 (male)
108
94 80
25
350
1/4F
wSelect the either back side or bottom side.
Air inlet
(bottom side)
100
75 170
Suspension bolt
M10 or 3/8
(procure locally)
1100
270
Access door
PLATE (A)
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9
4WIRING DIAGRAM
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SWE
OFF
ON SW3
OFF 54321
ON
SW2
OFF 54321
ON
(POWER
BOARD)
CNDK
RED
RED
WHT
ZNR
FUSE
RED
BLU
CND
(POWER)
ORN
BLU YLW
WHT BRN BLU
BLK
1234567
87654321
BLU BRN YLW ORN
871 2 3 4 5 6
RED
BLK
RED
WHT
C1
MF
ORN
WHT
FAN
(FAN)
CN90
BLU
BLU
(REMOCON)
BLU
TO OUTDOOR
UNIT
S3
P.B
123
TB4S1
S2
TB151
2TO MA-REMOTE
CONTROLLER
DC8.7-13V
}
I.B
1 2
CN22
1 2
WHT
RED
(INTAKE)
(LIQUID)
CN20
CN21
1 22
TH1 TH2
1 3
(CONTROL)
CN3C
BLU
3
LED1
1 2
TRANS
DC13.1V
CN2S(WHT)
AC220-240V
CNSK(RED)
WHT
BLK
2
1
(POWER
BOARD)
CN2D
WHT
LED2
ORN
BLU
LED3
CN2L
CN32 CN51 CN41
X5
X5 X4
X4X6
X6
(2 PHASE)
CN29
BLK
1
TH5
31 1
54321
OFF
ON
KA60
<fig:w1>
MODELS
KA35
KA50 ON
OFF 12345
ON
OFF 12345
SW2
See fig:w1
SYMBOL NAME
CONNECTOR(WIRELESS)
Indoor Fan Motor(MF)
for 60Hz
4.Since the indoor fan motor(MF) is connected with 50Hz power,
if 60Hz power is used, change the wiring connection showing
fig:w2.
wFor details on how to operate self-diagnosis
refer to the technical manuals etc.
CN90
MF
C1
TB4
TB15
TH1
TH2
TH5
FAN MOTOR
CAPACITOR(FAN MOTOR)
TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK(REMOTE CONTROLLER
TRANSMISSION LINE)
ROOM TEMP.THERMISTOR
(0°C/15kΩ,25°C/5.4kΩDETECT)
PIPE TEMP.THERMISTOR/LIQUID
(0°C/15kΩ,25°C/5.4kΩDETECT)
COND./EVA.TEMP.THERMISTOR
(0°C/15kΩ,25°C/5.4kΩDETECT)
:Connector, :Terminal(block).
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).
NOTES:
3.Symbols used in wiring diagram above are,
FUSE(T6.3AL250V)
X6
X5
X4
ZNR
RELAY(FAN MOTOR Hi)
RELAY(FAN MOTOR LL)
RELAY(FAN MOTOR Lo)
VARISTOR
SWITCH(CAPACITY CODE)
SW3
SW2
SWE SWITCH(EMERGENCY OPERATION)
SWITCH(MODE SELECTION)
TRANSMISSION(INDOOR-OUTDOOR)
LED1
LED2
LED3
POWER SUPPLY(I.B)
POWER SUPPLY(I.B)
CN51 CENTRALLY CONTROL
FUSE
P.B
CONNECTOR(HA TERMINAL-A)
CONNECTOR(REMOTE SWITCH)
CONNECTOR(LOSSNAY)
CN41
CN32
CN2L
INDOOR CONTROLLER BOARD
INDOOR POWER BOARD
I.B
NAMESYMBOL
YELLOW
BLUE
BLUE
<fig:w2> 50
60
[LEGEND]
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10
REFRIGERANT SYSTEM DIAGRAM
5
Pipe temperature
thermistor/liquid
(TH2)
Distributor
with strainer
#50
Condenser/evaporator
temperature thermistor
(TH5)
Room temperature
thermistor (TH1)
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#50
Strainer
#50
Heat exchanger Refrigerant GAS pipe connection
(Flare)
Refrigerant LIQUID pipe connection
(Flare)
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
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11
6TROUBLESHOOTING
6-1. Cautions on troubleshooting
(1) Before troubleshooting, check the followings:
1Check the power supply voltage.
2Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care the followings during servicing.
1Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then turn
off the breaker.
2When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
3When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
˚C
˚C SIMPLE
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
B
C
A
E D
6-2. Self-check function
Wired remote controller
(1) Turn on the power.
(2) Press the [CHECK] button twice.
(3) Set refrigerant address with [TEMP] button
if system control is used.
(4) Press the [ON/OFF] button to stop the
self-check.
AACHECK button
BBRefrigerant address
CCTEMP button
DDIC : Indoor unit
OC : Outdoor unit
EECheck code
1 Check code Symptom Remark
P1 Intake sensor error
P2 Pipe (TH2) sensor error
P9 Pipe (TH5) sensor error
E6,E7 Indoor/outdoor unit communication error
P4 Drain sensor error
P5 Drain pump error
P6 Freeing/Overheating safeguard operation
EE Communication error between indoor and outdoor units
P8 Pipe temperature error
E0, E3~E5 Remote controller transmission error
E1, E2 Remote controller control board error
Fb Indoor unit control system error (memory error, etc.)
E9 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP Compressor overcurrent interruption
U3,U4 Open/short of outdoor unit thermistors
UF Compressor overcurrent interruption (When compressor locked)
U2 Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1,Ud Abnormal high pressure (63H worked)/Overheating safeguard operation
U5 Abnormal temperature of heat sink
U8 Outdoor unit fan safeguard stop
U6 Compressor overcurrent interruption/Abnormal of power module
U7 Abnormality of super heat due to low discharge temperature
U9,UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit
/Current sensor error
Others Other errors (Refer to the technical manual for the outdoor unit.)
For details, check the LED display
of the outdoor controller board.
As for outdoor unit, refer to
service manual OC322.
• On wired remote controller.
1Check code displayed in the LCD.
• For description of each check code, refer to the following table.
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12
6-3. Test point diagram
6-3-1. Indoor power board
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
CNSK
Connect to the indoor controller board
(CNDK)
Between 11to 33220-240V AC
CN2S
Connect to the indoor controller board (CN2D)
Between 11to 3312.6-13.7V DC (Pin11(+))
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13
6-3-2. Indoor controller board
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
FAN
Fan motor output
CNDK
Connect to the indoor
power board (CNSK)
(220~240V AC)
FUSE
(6.3A 250V)
CND
Power
supply input
(220~240V AC)
SWE
Emergency operation SW2
Capacity setting
Jumper connector
J11~J15
Unit setting
CN2L
Connector
(LOSSNAY)
CN51
Centrally control
CN29
Condenser/evaporator
temperature thermistor
(TH5)
CN21
Pipe temperature
thermistor/Liquid
(TH2)
CN20
Room temperature
thermistor (TH1)
CN22
Remote controller
connecting wire
(10.4~14.6V DC)
LED3
Transmission
(Indoor/outdoor)
LED2
Power supply
(R.B)
LED1
Power supply
(I.B)
CN2D
Connector to the indoor
power board (CN2S)
(12.5~13.7V DC)
CN3C
Transmission
(Indoor/outdoor)
(0~24V DC)
SW3
Mode selection
}
}
Non polarity
+
–
+
–
CN41
Connector
(HA terminal-A)
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14
6-4. Trouble criterion of main parts
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
BLK RED
GRN
YLW
ORNYLW
BLU BRN WHT
P
Room temperature
thermistor
(TH1)
Condenser/evaporator
temperature thermistor
(TH5)
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature 10°C ~ 30°C)
P: Thermal fuse
145 ±2˚C
Pipe temperature
thermistor/liquid
(TH2)
Indoor fan motor
(MF)
Check method and criterion
Part name
Normal
KA35VA Normal
WHT-BLK
BLK-BLU
BLU-YLW
YLW-BRN
BRN-RED
270~244Ω
19~20Ω
25~29Ω
13~15Ω
48~54Ω
KA50VA
157~175Ω
49~55Ω
18~20Ω
7~9Ω
38~42Ω
KA60VA
97~109Ω
54~60Ω
14~16Ω
6~8Ω
277~31Ω
8kΩ~20kΩAbnormal
Abnormal
Opened or
short-circuited
Opened or short-circuited
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15
DISASSEMBLY PROCEDURE7
1. Removing the electrical parts
(1) Remove the 2 screws and the 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.)
OPERATING PROCEDURE PHOTOS
2. Removing the pipe temperature thermistor (TH2)
(1) Remove the electrical parts cover. (Refer to 1.)
(2) Remove the 2 screws and the 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.
Service panel
(Pipe temperature
thermistor / liquid)
Front panel
Set screws
(for drain pan)
Set screws
Terminal
block (TB15)
Photo 2.
Photo 3.
Photo 1.
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
Electrical
parts cover
Service panel
(Condenser / evaporator
temperature thermistor)
Drain
pan
Indoor
controller box
Indoor controller board
Fan motor
capacitor
Indoor power board
Condenser / evaporator
temperature thermistor (TH5)
Screws
Screws
Service
panel
Photo 4.
3. Removing the condenser / evaporator temperature
thermistor (RT13)
(1) Remove the electrical parts cover. (Refer to 1.)
(2) Remove the 2 screws and 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.
Pipe temperature
thermistor / liquid
(TH2)
Terminal
block (TB4)
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16
4. Removing the room temperature thermistor (TH1)
(1) Remove the electrical parts cover. (Refer to 1.)
(2) Remove the 12 screws 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.
PHOTOS
OPERATING PROCEDURE
5. Removing the sirocco fan and the fan motor (MF).
(1) Remove the electrical parts cover. (Refer to 1.)
(2) Remove the 12 screws 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 the setting screw and remove the sirocco fan.
<Either left or right> (See Photo 7.)
Set screw
Earth wire
Motor bands
Claws Screws
Fan casing
Fan motor
Claws
Photo 5.
Photo 7.
Fan casing
Fan motor Room temperature
thermistor (TH1)
Photo 6. Separator
panel
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17
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.)
PHOTOS
OPERATING PROCEDURE
7. Removing the heat exchanger
(1) Remove the drain pan. (Refer to 1.)
(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.)
Screws
for heat exchanger Screws
for service panel
Photo 8.
Photo 9.
Heat exchanger
Under flange
Screws
Service
panel
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18
PARTS LIST8
No. Parts No. Parts name
Specification Remarks Unit
Amount
Wiring
Diagram
Symbol
Recom-
mended
Q'ty
Q'ty/set Price
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LEFT SIDE PANEL
SIROCCO FAN
FAN MOTOR RUBBER MOUNT
FAN MOTOR
FAN MOTOR
FAN MOTOR
ROOM TEMPERATURE THERMISTOR
FRONT PANEL
DRAIN PAN
PIPE TEMPERATURE THERMISTOR / LIQUID
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
RIGHT LEG
RIGHT SIDE PANEL
SEPARATOR ASSY
LEFT LEG
BASE
E07 039 086
E07 039 500
E02 179 505
E07 039 300
E07 040 300
E07 041 300
E07 159 308
E07 039 000
E07 039 700
E07 154 309
E07 159 307
E07 143 620
E07 144 620
E07 145 620
E07 039 808
E07 143 085
E07 143 293
E07 039 809
E07 039 290
(Drawing No.)
MF
MF
MF
TH1
TH5
TH2
PK6V19-EF
PK6V32-EF
PK6V50-EF
SEZ-
KA50VA.THKA35VA.TH KA60VA.TH
<2PCS/SET>
1
2
2
1
1
1
1
1
1
1
2
1
1
2
1
1
2
2
1
1
1
1
1
1
1
2
1
1
2
1
1
2
2
1
1
1
1
1
1
1
2
1
1
2
1
CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR
INDOOR UNIT
STRUCTURAL PARTS
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
8
10
7
6
5
2
3
14
1
15 12
4
Part number that is circled is not shown in the illustration.
13
9
11
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