Download Mitsubishi Electric KA60VA Service manual
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Home > Products > M Series > R410A Ceiling Concealed Ducted System > Inverter Heat Pump > SEZ-KA60VA Inverter Heat Pump R410A Ceiling Concealed Ducted System Designed for homes, offices, restaurants or shops, the SEZ series operates at Model Info 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: Dimensions SEZ-KA60VA (Click to enlarge). 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 SUZ-KA60VA (Click to enlarge). [Print] [Print] 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) Electrical Supply 6.35 (1/4) 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) Electrical Supply Phase 52 / 52 220-240v, 50Hz 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 Mains Cable No. Cores 10.4 / 9 3 Max Pipe Length (m) 30 Max Height Difference (m) 15 Charge (kg) - 7m 1.8 OC321-A-1.qxp 05.2.24 8:54 AM Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No.OC321 TECHNICAL & SERVICE MANUAL Indoor unit [Model names] [Service Ref.] SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA35VA SEZ-KA50VA SEZ-KA60VA Note : •This manual does not cover outdoor units. When servicing outdoor units, please refer to the service manual No.OC322 together with this manual. 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············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 OC321-A-1.qxp 1 05.2.24 8:54 AM Page 2 PART NAMES AND FUNCTIONS Indoor Unit SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH Air outlet Air outlet duct flange Air inlet (Selecting the either back side or bottom side) Wired remote controller On 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. 2 OC321-A-1.qxp 05.2.24 8:54 AM Page 3 ● 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 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 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 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 indication (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation. 3 OC321-A-1.qxp 2 05.2.24 8:54 AM 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 — Power supply Capacity Air flow (High/Low) Power outlet Running current ✽1 Power input Rated frequency Auxiliary heater Power factor ✽1 Fan motor current ✽1 Model SEZ-KA50VA.TH 93 Heating Single phase 230V, 50Hz 1020/720 20 0.55 80 — 97 94 0.22 PK6V19-EF WHT-BLK : 257 BLK-BLU : 20 BLU-YLW : 27 YLW-BRN : 14 BRN-RED : 51 1100o270o700 33.5 1 35/30 770/630 3 Std : 30 Max : 50 10 10 10 98 0.27 PK6V32-EF WHT-BLK : 166 BLK-BLU : 52 BLU-YLW : 19 YLW-BRN : 8 BRN-RED : 40 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. 5: 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-KA35/50VA.TH : 2.5+ 440V (FUSE) Varistor Terminal block (ZNR) (TB) SEZ-KA60VA.TH : 3.0+ 440V 250V 6.3A ERZV10D471 TO OUTDOOR UNIT : 3P Indoor fan motor thermal fuse TO WIRED REMOTE CONTROLLER : 2P 145:i2: 4 OC321-A-1.qxp 05.2.24 8:54 AM Page 5 Indoor model SEZ-KA60VA.TH Function Cooling Power supply Special remarks Fan motor Electrical data Capacity 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" Heating Single phase 230V, 50Hz 1200/720 20 0.65 100 — 98 98 0.39 PK6V50-EF WHT-BLK : 103 BLK-BLU : 57 BLU-YLW : 15 YLW-BRN : 7 BRN-RED : 29 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 OC321-A-1.qxp 05.2.24 8:54 AM 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 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. 6 OC321-A-1.qxp 05.2.24 8:54 AM 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 0.8 1.3 40 20 0 0.9 5 10 15 20 25 20 25 Air flow (K/X) Correction factor External static pressure(Pa) (1Pa = 0.1mmAq) 80 1.0 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 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) Capacity Input Cooling 25 Air flow (K/X) 1.0 0.9 0.8 5 10 15 Air flow (K/X) SEZ-KA60VA.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) 7 OC321-A-1.qxp 05.2.24 8:54 AM 3 Page 8 OUTLINES AND DIMENSIONS Unit : mm SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.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 700 Access door bolt pitch (10) 680 60 38 350 50 Suspension 1000 600 24-{2.9 holes 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 32.5 100 Wiring entry Terminal block Access door Air outlet duct flange 94 25 108 75 2x2-{2.9 holes Air inlet (bottom side) 50 20 25 (10) Electrical parts box 1100 w 170 Refrigerent pipe (liquid) 30 (Suspension bolt pitch) Refrigerent pipe (gas) 20 or more (1070) 270 Suspension bolt M10 or 3/8 (procure locally) 80 Electrical parts box Drain plug R1 (male) 350 Select the either back side or bottom side. Models SEZ-KA35VA SEZ-KA50VA SEZ-KA60VA 8 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 flared connection 3/8F {12.7mm flared connection 1/2F {15.88mm flared connection 5/8F OC321-A-1.qxp 05.2.24 8:54 AM 4 Page 9 WIRING DIAGRAM SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH MF TB4 BRN 3 4 5 6 7 8 1 2 3 4 5 6 7 8 BLU 2 YLW TO OUTDOOR UNIT S3 1 ORN C1 BLU YLW BLK ORN RED WHT S1 S2 RED P.B 1 2 3 AC220-240V CNSK(RED) KA60 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 KA35 BRN SW2 ON OFF 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 X6 X5 ZNR X4 WHT (POWER BOARD) CN2D X4 SW3 ON OFF 1 2 BLK WHT LED3 12345 LED1 CN2L BLK RED (2 PHASE) (INTAKE) CN20 CN29 12345 1 CN51 CN32 CN41 2 1 2 CN90 See fig:w1 LED2 WHT (LIQUID) CN21 1 2 BLU (REMOCON) CN22 1 2 BLU SW2 ON OFF BLU SWE ON OFF X5 TB15 1 2 TH5 [LEGEND] SYMBOL P.B NAME INDOOR POWER BOARD 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) 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 showing 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. 9 TH1 TH2 } TO MA-REMOTE CONTROLLER DC8.7-13V OC321-A-1.qxp 5 05.2.24 8:54 AM Page 10 REFRIGERANT SYSTEM DIAGRAM SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.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 10 OC321-A-1.qxp 05.2.24 8:54 AM 6 Page 11 TROUBLESHOOTING 6-1. Cautions on troubleshooting (1) Before troubleshooting, check the followings: 1 Check the power supply voltage. 2 Check the indoor/outdoor connecting wire for mis-wiring. (2) Take care the followings during servicing. 1 Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then turn off the breaker. 2 When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the components. 3 When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. 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. A CHECK button B Refrigerant address C TEMP button D IC : Indoor unit OC : Outdoor unit E Check code B E D ˚C ˚C SIMPLE TEMP. C MENU BACK PAR-21MAA MONITOR/SET ON/OFF ON/OFF FILTER DAY CLOCK CHECK TEST OPERATION CLEAR A • For description of each check code, refer to the following table. 1 Check code P1 P2 P9 E6,E7 P4 P5 P6 EE P8 E0, E3~E5 E1, E2 Fb E9 UP U3,U4 UF U2 U1,Ud U5 U8 U6 U7 U9,UH Others Symptom Intake sensor error Pipe (TH2) sensor error Pipe (TH5) sensor error Indoor/outdoor unit communication error Drain sensor error Drain pump error Freeing/Overheating safeguard operation Communication error between indoor and outdoor units Pipe temperature error Remote controller transmission error Remote controller control board error Indoor unit control system error (memory error, etc.) Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit) Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharging temperature/49C worked/insufficient refrigerant Abnormal high pressure (63H worked)/Overheating safeguard operation Abnormal temperature of heat sink Outdoor unit fan safeguard stop Compressor overcurrent interruption/Abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit /Current sensor error Other errors (Refer to the technical manual for the outdoor unit.) • On wired remote controller. 1 Check code displayed in the LCD. 11 Remark For details, check the LED display of the outdoor controller board. As for outdoor unit, refer to service manual OC322. OC321-A-1.qxp 05.2.24 8:54 AM Page 12 6-3. Test point diagram 6-3-1. Indoor power board SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.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 12 OC321-A-1.qxp 05.2.24 8:54 AM Page 13 6-3-2. Indoor controller board SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH LED3 Transmission (Indoor/outdoor) – + + CN3C Transmission (Indoor/outdoor) (0~24V DC) LED1 Power supply LED2 Power supply (I.B) (R.B) } CN2D Connector to the indoor power board (CN2S) (12.5~13.7V DC) 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 13 SW2 Capacity setting OC321-A-1.qxp 05.2.24 8:54 AM Page 14 6-4. Trouble criterion of main parts SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.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 GRN WHT-BLK 270~244Ω 157~175Ω 97~109Ω YLW BLK-BLU 19~20Ω 49~55Ω 54~60Ω BLU-YLW 25~29Ω 18~20Ω 14~16Ω YLW-BRN 13~15Ω 7~9Ω 6~8Ω BRN-RED 48~54Ω 38~42Ω 277~31Ω 145 ± 2˚C 14 Abnormal Opened or short-circuited OC321-A-1.qxp 05.2.24 8:54 AM 7 Page 15 DISASSEMBLY PROCEDURE SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH OPERATING PROCEDURE PHOTOS 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.) Photo 1. Service panel (Pipe temperature thermistor / liquid) Electrical parts cover Drain pan Set screws Service panel Front panel Set screws (Condenser / evaporator (for drain pan) temperature thermistor) 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 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. Fan motor capacitor 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. Indoor controller board Photo 4. Photo 3. Screws Pipe temperature thermistor / liquid (TH2) Service panel Screws 15 Indoor power board Condenser / evaporator temperature thermistor (TH5) OC321-A-1.qxp 05.2.24 8:54 AM Page 16 PHOTOS OPERATING PROCEDURE 4. Removing the room temperature thermistor (TH1) Photo 5. (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. 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 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.) Photo 7. Set screw Earth wire 16 Fan motor Separator panel Fan casing Fan motor Fan casing OC321-A-1.qxp 05.2.24 8:54 AM Page 17 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 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.) Under flange Photo 9. Screws for heat exchanger Service panel Heat exchanger 17 Screws for service panel OC321-A-1.qxp 8 05.2.24 8:54 AM Page 18 PARTS LIST INDOOR UNIT STRUCTURAL PARTS SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH 15 14 13 12 11 1 10 2 3 9 8 7 5 4 6 Part number that is circled is not shown in the illustration. Q'ty/set No. Parts No. Parts name Specification Price Wiring RecomRemarks Diagram mended (Drawing No.) Symbol Q'ty Unit Amount KA35VA.TH KA50VA.TH KA60VA.TH SEZ- 1 E07 039 086 LEFT SIDE PANEL 1 1 1 2 E07 039 500 SIROCCO FAN 2 2 2 3 E02 179 505 FAN MOTOR RUBBER MOUNT 2 2 2 E07 039 300 FAN MOTOR PK6V19-EF 4 E07 040 300 FAN MOTOR PK6V32-EF E07 041 300 FAN MOTOR PK6V50-EF 1 <2PCS/SET> MF 1 MF 1 MF TH1 5 E07 159 308 ROOM TEMPERATURE THERMISTOR 1 1 1 6 E07 039 000 FRONT PANEL 1 1 1 7 E07 039 700 DRAIN PAN 1 1 1 CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR 1 1 1 TH5 9 E07 159 307 PIPE TEMPERATURE THERMISTOR / LIQUID 1 1 1 TH2 8 E07 154 309 E07 143 620 INDOOR HEAT EXCHANGER 1 10 E07 144 620 INDOOR HEAT EXCHANGER 1 E07 145 620 INDOOR HEAT EXCHANGER 1 11 E07 039 808 RIGHT LEG 2 2 2 12 E07 143 085 RIGHT SIDE PANEL 1 1 1 13 E07 143 293 SEPARATOR ASSY 1 1 1 14 E07 039 809 LEFT LEG 2 2 2 15 E07 039 290 BASE 1 1 1 18 OC321-A-1.qxp 05.2.24 8:54 AM Page 19 INDOOR UNIT ELECTRICAL PARTS SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.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 illustration. Q'ty/set No. Parts No. Parts name Specification Price Wiring RecomRemarks Diagram mended SEZUnit Amount (Drawing No.) Symbol Q'ty KA35VA.TH KA50VA.TH KA60VA.TH E07 159 447 INDOOR CONTROLLER BOARD 1 1 E07 160 447 INDOOR CONTROLLER BOARD I.B 1 E07 161 447 INDOOR CONTROLLER BOARD 2 E02 661 385 VARISTOR 3 E07 006 382 FUSE 250V/6.3A 4 E07 154 440 INDOOR POWER BOARD 5 E02 063 351 FAN MOTOR CAPACITOR 2.5+ I.B 1 I.B 1 1 1 ZNR 1 1 1 FUSE 1 1 1 P.B 1 1 E02 138 351 FAN MOTOR CAPACITOR 3.0+ C1 1 C1 6 E07 156 375 TERMINAL BLOCK 2P 1 1 1 TB15 7 E07 162 375 TERMINAL BLOCK 3P 1 1 1 TB4 8 E07 159 426 REMOTE CONTROLLER 1 1 1 R.B 9 E07 018 089 REMOTE CONTROLLER CABLE 1 1 1 10 E07 039 449 CONTROLLER COVER 1 1 1 19 OC321-A-1.qxp 9 05.2.24 8:54 AM Page 20 OPTIONAL PARTS 9-1. REFRIGERANT PIPES The air conditioner has flared connections its indoor and outdoor sides. Please use the optional extension pipe as follows. Pipe size O.D.mm (in.) Applied unit Models Pipe length Cross-section SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH MAC-680PI MAC-681PI MAC-682PI MAC-683PI MAC-684PI MAC-670PI MAC-671PI MAC-672PI MAC-673PI MAC-674PI MAC-860PI MAC-861PI MAC-862PI MAC-863PI MAC-864PI 3m 5m 7m 10m 15m 3m 5m 7m 10m 15m 3m 5m 7m 10m 15m A-Gas B-liquid {9.52 C Insulation D {27 (3/8) {21 Additional refrigerant charge R410A (g) 0 60 150 300 0 {12.7 {6.35 (1/2) (1/4) {31 {27 40 100 200 0 {15.88 40 100 200 (5/8) 9-2. AIR FILTER Applied unit SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH Models PAC - 1000 FT HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Feb. 2005 No. OC321 PDF 8 Made in Japan. New publication, effective Feb. 2005. Specifications subject to change without notice.