Page 2 - COMBINATION OF INDOOR AND OUTDOOR UNITS; Heat pump type
2 1 COMBINATION OF INDOOR AND OUTDOOR UNITS Heat pump type Outdoor unit SUZ- SLZ-KA25VA(L).TH SLZ-KA35VA(L).TH SLZ-KA50VA(L).TH SLZ-KA25VAQ.TH SLZ-KA35VAQ.TH SLZ-KA50VAQ.TH SEZ-KD25VA(L).TH SEZ-KD35VA(L).TH SEZ-KD50VA(L).TH SEZ-KD60VA(L).TH SEZ-KD71VA(L).TH SEZ-KD25VAQ.TH SEZ-KD35VAQ.TH SEZ-KD50VAQ....
Page 3 - TECHNICAL CHANGES; Refrigerant; INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT; materials are required. Refer to the table below.; NOTE; The conversion factor is:
3 2 TECHNICAL CHANGES Refrigerant oil Refrigerant New refrigerant R410A HFC-32: HFC-125 (50%:50%) Pseudo-azeotropic refrigerant Not included A1/A1 72.6 -51.4 1.557 64 Non combustible 0 1730 From liquid phase in cylinder Possible Incompatible oil NoneNone Previous refrigerant R22 R22 (100%) Single re...
Page 4 - Tools dedicated for the air conditioner with R410A refrigerant; Conversion chart of refrigerant temperature and pressure; : The unit of pressure has been changed to MPa on the
4 R410A tools Can R22 tools be used? Gas leak detector R410A has high pressures beyond the measurement range of existing gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit. Hose material and cap size have been changed to improve the pressure re...
Page 5 - Flaring work and flare nut; Refrigerant piping; Specifications
5 Electronic scale for refrigerant charging Outdoor unit Refrigerant gas cylinderoperating valve Refrigerant gas cylinderfor R410A with siphon Refrigerant (liquid) Service port Gauge manifold valve (for R410A) Union Liquid pipe Gas pipe Stop valve Indoor unit Charge hose (for R410A) R410A Pipe diame...
Page 6 - PART NAMES AND FUNCTIONS; Model; Drain socket
6 3 PART NAMES AND FUNCTIONS SUZ-KA25VA2.TH SUZ-KA35VA2.TH SUZ-KA50VA2.TH SUZ-KA60VA2.TH SUZ-KA71VA2.TH Air outlet Drain outlet Piping Drain hose Air inlet (back and side) Piping Air outlet Air inlet (back and side) Drain hose Drain outlet Model SUZ-KA25/35VA2.TH SUZ-KA50/60VA2.TH SUZ-KA71VA2.TH Dra...
Page 7 - SPECIFICATION; Compressor
7 SPECIFICATION 4 Function Power supply Outdoor Service Ref. Starting current *1Compressor motor current *1Fan motor current *1ModelOutputWindingresistance (at 20 ) Model Windingresistance(at 20 ) Air flow(High/Low + ) Dimensions W H D WeightSound level *1Fan speed(High + /Low + , High + /Med + /Low...
Page 8 - Specifications and rating conditions of main electric parts
8 SUZ-KA25VA2.TH SUZ-KA35VA2.THSUZ-KA50VA2.TH SUZ-KA60VA2.THSUZ-KA71VA2.TH Specifications and rating conditions of main electric parts Model Item SUZ-KA25VA2. TH SUZ0KA35VA2. TH SUZ-KA50VA2. TH SUZ-KA60VA2. TH SUZ-KA71VA2. TH Currenttransformer (CT) 20A - - (CT1, 2) - ETQ19Z68AY - (CT61) - ETQ19Z53A...
Page 9 - NOISE CRITERIA CURVES
9 9 NOISE CRITERIA CURVES 5 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT A VE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR BAND CENTER FREQUENCIES, Hz APPROXIMATETHRESHOLD OF HEARING FORCONTINUOUSNOISE COOLING FUNCTION SPL(dB(A)) LINE Hig...
Page 10 - OUTLINES AND DIMENSIONS; REQUIRED SPACE
10 6 OUTLINES AND DIMENSIONS 10 69 800 302.5 500 Bolt pitch for installation 150 22.3 Handle 550 280 164.5 99.5 170.5 23 Service panel Service port 285 344.5 44 400 Air in Air out Air in 17.5 Bolt pitch for installation 304~325 40 Liquid refrigerant pipe jointRefrigerant pipe (flared) : 6.35 Gas ref...
Page 11 - Service panel; Drain holes
11 11 Unit: mm 30 35 155 90 198 40 515 299 66 34 51 330 850 430 500 81 121 840 Open as a rule500mm or more ifthe front and bothsides are open 100mm or more 200mm or more if there are obstaclesto both sides Open as a rule500mm or more if the back,both sides and top are open 350mm or more 100mm or mor...
Page 13 - WIRING DIAGRAM
13 13 7 WIRING DIAGRAM SUZ-KA25VA2.THSUZ-KA35VA2.TH NOTES:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only . (For field wiring) 3. Symbols below indicate. : T erminal block OCH472A
Page 14 - INVER; MC; MF
14 SUZ-KA50VA2.TH POWER SUPPL Y ~/N 230V 50Hz CIRCUIT BREAKER TO INDOOR UNIT CONNECTING 230V~ 12-24V S3 S1 S2 TB2 BRN BLU RED L N GRN/YL W TB1 BLK BRN BLU F61 BRN LD-E1 LD-S LD62 LD61 L62 DSA PTC65 PTC64 LD63 CT F701 X64 U U U 6 14 12 1 3 12 1 1 3 5 1 3 5 CN724 CN641 CN643 CN644 CN642 RT 62 RT 61 RT...
Page 17 - REFRIGERANT SYSTEM DIAGRAM
17 17 REFRIGERANT SYSTEM DIAGRAM 8 Unit: mm SUZ-KA25VA2.TH Unit: mm SUZ-KA35VA2.TH Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve (with strainer) Stop valve (with service port) Refrigerant flow in cooling Compressor 4-way valve Refrigeran...
Page 20 - MAX. REFRIGERANT PIPING LENGTH; Outdoor unit; MAX. HEIGHT DIFFERENCE
20 ADDITIONAL REFRIGERANT CHARGE (R410A: g) SUZ-KA25VA2.TH SUZ-KA35VA2.TH SUZ-KA50VA2.THSUZ-KA60VA2.TH SUZ-KA71VA2.TH MAX. REFRIGERANT PIPING LENGTH Max. Length A + Height difference limitations are binding regardless of which unit, indoor or outdoor, is position high. + Max. Height difference B Ind...
Page 21 - ACTUATOR CONTROL; -3. Relation between main sensor and actuator; : The 4-way valve reverses for 5 seconds
21 21 ACTUATOR CONTROL 9 SUZ-KA25VA2.TH SUZ-KA35VA2.TH SUZ-KA50VA2.TH SUZ-KA60VA2.TH SUZ-KA71VA2.TH 9-3. Relation between main sensor and actuator 9-2. R.V. coil control Heating . . . . . . . . . . . . . . . . . ON Cooling . . . . . . . . . . . . . . . . . OFF Dry . . . . . . . . . . . . . . . . . ....
Page 22 - CHANGE IN DEFROST SETTING; TROUBLESHOOTING; Troubleshooting procedure; Housing point; SERVICE FUNCTIONS
22 SUZ-KA25VA2.TH SUZ-KA35VA2.TH CHANGE IN DEFROST SETTING <JS> When the JS wire of the outdoor Inverter P.C. board is cut/ soldered, the defrost finish temperature is changed. (Refer to 11-6-1) 11 TROUBLESHOOTING 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp is ...
Page 24 - CHECK button
24 11-2-2. Wired remote controller 11-2-3. Failure mode table (Wireless remote controller/Wired remote controller) Turn on the power. Press the [CHECK] button twice. Set refrigerant address with [TEMP] button if system control is used. Press the [ON/OFF] button to stop the self-check. °C °C SIMPLE P...
Page 34 - A How to check inverter/compressor; C Check of compressor
34 A How to check inverter/compressor Are the voltages balanced? Disconnect the connector between compressor and the intelligent power module (IPM). Replace the inverter P.C. board. Check the voltage between terminals. Check the compressor. See D “Check of compressor”. No Yes See B “Check of open ph...
Page 35 - D Check of compressor winding; E Check of compressor operation time; F Check of outdoor thermistors
35 [SUZ-KA25/35/50VA2.TH] D Check of compressor winding Disconnect the connector between the compressor and intelligent power module, and measure the resistance between the compressor terminals. <<Measurement point>> at 3 points BLK-WHT BLK-RED WHT-RED<<Judgement>> Refer to 1...
Page 36 - H Check of outdoor fan motor
36 G Check of R.V. coil First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-4. In case CN721 is not connected or R.V. coil is open, voltage is generated between the terminal pins of the connector although any signal is not being transmitted to R.V. coil. ...
Page 37 - (For wireless remote controller use model)
37 I Check of power supply Is there voltage 230 VAC between the indoor terminal block S1 and S2? No Yes Replace the indoor electronic control P.C. board. Rectify indoor/outdoor connecting wire. Yes If light up, OK.If fl ash, refer to 11-3. Does the left lamp of OPERATION INDICATOR lamp on the indoor...
Page 38 - J Check of LEV
38 J Check of LEV (For wired remote controller use model) Turn on power supply to the outdoor unit after checking LEV coil is fi xed to the LEV body securely. Yes Disconnect the connector CN724 is there nor-mal resistance to LEV coil? No Replace the inverter P.C. board. Replace the LEV coil. No Norm...
Page 39 - L How to check miswiring and serial signal error
39 L How to check miswiring and serial signal error [SUZ-KA25/35/50VA2.TH] (For wireless remote controller use model) Turn OFF the power supply. Is there rated voltage in the power supply? Yes No Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor termi-nal block...
Page 41 - Electromagnetic noise enters into TV sets or radios
41 Electromagnetic noise enters into TV sets or radios Yes Is the unit earthed? No Earth the unit. Yes Is the distance between the antennas and the indoor unit within 3 m, or is the distance between the antennas and the outdoor unit within 3 m? No Extend the distance between the antennas and the ind...
Page 42 - Check of power supply; Turn on power supply.
42 [SUZ-KA60VA2.TH] Check of power supply Outdoor unit does not operate. (LED display: display OFF) Turn on power supply. No Yes Yes No No Yes No Yes Yes No Replace the power board. Start Check the connecting of parts of main power supply circuit. Is there voltage of 230V AC in the power supply term...
Page 46 - Yes
46 [SUZ-KA60VA2.TH] How to check inverter/ compressor When heating, room does not get warm. When cooling, room does not get cool. LED display: LED1 LED2 Lighting Lighting Lighting Twice Twice Goes out Check of LEV No Yes No Yes Turn on power supply to the outdoor unit after checking LEV coil is moun...
Page 47 - Check of outdoor thermistors; When thermistor is abnormal.; Check of outdoor fan motor
47 [SUZ-KA60VA2.TH] Check of outdoor thermistors When thermistor is abnormal. No Yes No Yes Reconnect the connector CN661 on the outdoor electronic control P.C. board and CN3 on the power board, and disconnect the lead wire leading to the compressor. 3 minutes after turning on the power supply, star...
Page 48 - Check of HPS; Infinity; When the operation frequency does not go up from lowest frequency.; Check of current-limiting resistor
48 [SUZ-KA60VA2.TH] Check of HPS Infinity 0 Yes No 1. Disconnect the connector CN681 in the electronic control P.C. board.2. Check the resistance of HPS after 1 minutes have passed since the outdoor unit power supply was turned off. Check the resistance between each terminal. Reconnect CN681.Turn on...
Page 51 - g Check of outdoor thermistors; Unit operates COOL mode even if it is set to HEAT mode.
51 g Check of outdoor thermistors h Check of R.V. coil Replace the thermistor except RT64.When RT64 is abnormal, replace the inverter P.C. board. Replace the inverter P.C. board. No No Is the resistance of thermistor normal? (Refer to 11-6-3.) Reconnect the connector of thermistor.Turn ON the power ...
Page 53 - k Check of LEV
53 Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. 1 Expansion valve operates in full-opening direction. OK NOTE : After check of LEV, do the undermentioned operations. 1. Turn OFF the power sup...
Page 55 - m How to check miswiring and serial signal error
55 m How to check miswiring and serial signal error Turn OFF inverter-controlled lighting equipment.Turn OFF the power supply and then turn ON again.Press EMERGENCY OPERATION switch. • • • A Is serial signal error indicated 6 minutes later? B Yes Reinstall either the unit or the light away from each...
Page 56 - n Electromagnetic noise enters into TV sets or radios
56 n Electromagnetic noise enters into TV sets or radios Yes Is the unit earthed? No Earth the unit. Yes Is the distance between the antennas and the indoor unit within 3 m, or is the distance between the antennas and the outdoor unit within 3 m? No Extend the distance between the antennas and the i...
Page 57 - Back side of unit
57 11-6. Test point diagram and voltage11-6-1. Inverter P.C. boardSUZ-KA25VA2.TH SUZ-KA35VA2.TH -20 -10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature(°C) Defrost thermistor(RT61) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68) Temperature(°C) Dis...
Page 59 - LED
59 11-6-3. Inverter P.C. boardSUZ-KA71VA2.TH -20 -10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature( ) Defrost thermistor(RT61) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68) Temperature( ) Discharge temperature thermistor(RT62) 0 10 20 30 40 50 ...
Page 63 - DISASSEMBLY INSTRUCTIONS; Removing the cabinet
63 63 12 DISASSEMBLY INSTRUCTIONS (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. Slide the sleeve. Pull the terminal while pushing the locking lever. Hold the sleeve, and pull out the terminal slowly. The terminal wh...
Page 64 - Photo 3
64 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board (1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the lead wire to the reactor and the following con- nectors:<Inverter P.C. board> CN721 (R.V. coil)CN932 (Fan motor)CN641 (Defrost thermistor and ...
Page 65 - Removing outdoor fan motor
65 OPERATING PROCEDURE PHOTOS 5. Removing outdoor fan motor (1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the following connectors: <Inverter P.C. board> CN932 (Fan motor) (3) Remove the propeller nut. (Photo 7)(4) Remove the propeller. (Photo 7)(5) Remove the screws fixing th...
Page 67 - Photo 4
67 2. Removing the inverter assembly, inverter P.C. board and power board (for SUZ-KA50VA2.TH) (1) Remove the top panel, cabinet, service panel and back panel. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors; <Inverter P.C. board>CN721 (R.V.coil)CN932 (Fa...
Page 68 - for; Photo 9; Propeller; OPERATING PROCEDURE; (6) Pull out the outdoor heat exchanger temperature thermistor; Photo 7; Discharge temperature thermistor
68 5. Removing outdoor fan motor (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.)(3) Disconnect the following connectors; for SUZ-KA50VA2.TH <Inverter P.C. board> CN931 and CN932 (Fan motor) for SUZ-KA60VA2.TH <Electric control P.C....
Page 69 - Removing the compressor and 4-way valve; Recover gas from the pipes until the pressure; Removing the reactor; Screws of the reactor
69 6. Removing the compressor and 4-way valve (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.)(3) Remove the inverter assembly. (Refer to 2.)(4) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure ga...
Page 70 - Turn OFF power supply before disassembling.; Screws of the top panel
70 NOTE: Turn OFF power supply before disassembling. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screws of the service panel.(2) Remove the screws of the top panel.(3) Remove the screw of the valve cover.(4) Remove the service panel.(5) Remove the top panel.(6) Remove the valve...
Page 71 - and outdoor heat exchanger temperature thermistor); Earth wires
71 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board (1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the lead wire to the reactor and the following con- nectors: <Inverter P.C. board>CN602 (R.V. coil)CN931, CN932 (Fan motor)CN671 (Defrost thermist...
