4.
CONTENTS 4.1 GENERAL INFORMATION ...................................................................... 119 4.1.1 Specific features ................................................................................ 119 4.1.2 How to read the model name............................................................ 119 4.2 SELECTION DATA ................................................................................... 120 4.2.1 Specifications .............................................................
4.1 GENERAL INFORMATION 4.1.1 Specific features (1) The long piping makes the location of the inside and units flexible. ¡ No need for additional charge of refrigerant : 30 m ¡ Maximum piping length : 40 m (2) Connectable indoor capacity Number of connectable units : 2 to 3 units Total of indoor units (class kW) : 9.6 kW (3) Indoor units are available with 6 capacities, in 2 types and 7 models. 6 capacities .......... 22, 25, 28, 32, 40, 50 2 types ..................
.2 SELECTION DATA 4.2.
Models SKM32ZA, 40ZA, 50ZA Models SKM32ZA SKM40ZA SKM50ZA Item Cooling capacity W 3200 4000 5000 Heating capacity W 4500 5400 6700 Sound level Hi : 40 Lo : 30 Hi : 42 Lo : 31 Hi : 43 Lo : 31 Hi : 54 Lo : 44 Hi : 56 Lo : 45 Hi : 57 Lo : 45 Sound level Hi : 41 Lo : 32 Hi : 42 Lo : 32 Hi : 43 Lo : 31 Power level Hi : 55 Lo : 46 Hi : 56 Lo : 46 Hi : 57 Lo : 45 Cooling Power level Noise level dB Heating Exterior dimensions 275 × 790 × 174 mm Height × Width × Depth Col
(b) Ceiling recessed type Model SRRM40ZA Model SRRM40ZA Item Cooling capacity W 4000 Heating capacity W 6000 Sound level Hi : 41 Lo : 33 Hi : 55 Lo : 47 Sound level Hi : 44 Lo : 34 Power level Hi : 58 Lo : 48 Cooling Power level Noise level dB Heating Exterior dimensions mm Height × Width × Depth Color 230 × 740 × 455 — Net weight kg Air handling equipment 19 Multiblede centrifugal fan × 2 Fan type & Q’ty Motor W Cooling Air flow (at high) 21 8.5 CMM Heating 9.
(2) Outdoor unit Model SCM68ZA Model SCM68ZA Item Cooling capacity W Heating capacity W 6800 (1800~7000) 7300 (2000~7600) Power source 1 Phase 220/230/240V 50Hz Cooling Power consumption 3230 (500~3400) W Heating 2950 (500~3400) Cooling Running current 17.0/16.6/16.1 A Heating 17.0/16.6/16.
(3) Operation data ¡ The combinations of the indoor units is indicated by numbers. They are read as follows. (Example) SKM22ZA / 22 SKM50ZA / 50 ¡ The capacity of the indoor units is shown by rooms. If this exceeds the maximum capacity of the outdoor unit, the demand capacity will be proportionally distributed. ¡ If units are to be combined, use the table below to make the proper selection.
Indoor unit combination Heating capacity (kW) Room heating capacity (kW) A room B room C room 3 room Power consumption (W) Total capacity (kW) Min. Standard Max. Standard current (A) Min. Standard Max. 220V 230V 240V 28+28+28 2.37 2.37 2.37 4.5 7.1 7.4 1,650 2,970 3,380 17.1 16.7 16.2 28+28+32 2.3 2.3 2.6 4.5 7.2 7.5 1,650 2,960 3,360 17.1 16.6 16.2 28+28+40 2.1 2.1 3.0 4.5 7.3 7.6 1,650 2,950 3,340 17.0 16.6 16.1 28+32+32 2.2 2.5 2.5 4.5 7.2 7.
Indoor unit combination Cooling capacity (kW) Room cooling capacity (kW) A room B room C room 3 room Power consumption (W) Total capacity (kW) Min. Standard Max. Standard current (A) Min. Standard Max. 220V 230V 240V 25+28+28 2.0 2.2 2.2 4.0 6.4 6.6 1,650 2980 3220 15.7 15.3 14.9 25+28+32 1.9 2.1 2.5 4.0 6.5 6.7 1,650 3050 3300 16.0 15.7 15.2 25+28+40 1.8 2.0 2.9 4.0 6.7 6.9 1,650 3180 3400 16.7 16.3 15.8 25+32+32 1.8 2.4 2.4 4.0 6.6 6.
4.2.3 Exterior dimensions (1) Indoor unit Models SKM22ZA, 25ZA Unit: mm A 178 Room temp. thermistor 750 3 49 615 65 450 150 236.5 19 15 9 46 150 Terminal block 117 75 9 250 56 Piping hole right (left) 16 60 36 40 4.5 92 62 62 7.5 7.5 Piping for Gas (Ø9.52) 370 40 37 Piping for Liquid (Ø6.35) 420 Piping hole (Ø65) Model Piping hole (Ø65) VIEW A SKM28ZA Unit: mm A 790 174 3 Room temp.
Models SKM32ZA, 40ZA Unit: mm A 790 174 3 Room temp. thermistor 56 275 Piping hole right (left) 9 Terminal block 760 170 46 187.5 260 61 117 450 170 49 15 9 15 16 36 6 60 780 51 62 Piping for Gas (Ø12.7) 390 67 37 Piping for Liquid (Ø6.
Model SRRM40ZA Unit: mm 320 35 35 670 (Suspension bolts pitch) 117 16 60 30 243 455 Controller 515 (Suspension bolts pitch) 30 Suspension bolts (M8 × 4) (Procured by customer) 107 740 230 [I] Air outlet 150 Terminal block 38 Drain hose (Connection opening diameter ø 16) 135 Gas piping (ø 12.7) 75 Liquid piping (ø 6.
(2) Outdoor unit Model SCM68ZA Drain hole 286.4 50 12 328 14 49.6 314 290 43.5 12 476 203.1 510 136.9 Elogated hole (2-12X16) Terminal block Liquide line service valve C Unit (ø6.35) 124 Gas line service valve C Unit (ø12.7) Gas line service valve B Unit (ø9.52) Liquide line service valve A Unit (ø6.35) 20º 42.7 67.9 20º Gas line service valve A Unit (ø9.52) Ground terminal 15 100.3 34.6 Liquide line service valve B Unit (ø6.35) 42.7 67.9 640 42.7 850 4.2.
4.2.5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in the following way. Net capacity = Capacity shown on specification ✕ Correction factors as follows. (1) Coefficient of cooling and heating capacity in relation to temperatures Coefficient of cooling & Heating capacity in relation to temperature 1.3 1.2 Cooling 1.1 1.0 Heating 0.9 0.8 0.7 0.6 Outdoor air D.B. temperature °C D.B.
4.3 ELECTRICAL DATA Meaning of marks • Outdoor Unit Symbol CM C FM0 Re SA CT DS NF Parts name Compressor motor Capacitor Fan motor Reactor Serge absorber Current sensor Diode stack Noise filter Symbol EEVA ~ C 20S Tho-A Tho-R Tho-D LED5 LED1 ~ 3 52X5 Parts name Electric expansion valve 4 way valve (coil) Thermistor (outdoor air temp.) Thermistor (outdoor H.X temp.) Thermistor (discharge temp.
Model SKM50ZA RD 3 WH 2 BK 1 Power line (Outdoor unit) Y/GN R BL Y BK RD J 5 4 WH FMI S Color symbol Printed circuit bord F ( 250V 3.15A ) 3 BK BL Y RD WH Y/GN 2 1 CNU ZNR Black Blue Yellow Red White Yellow/Green CNM SM CNE CNH Wireless R-Amp CNF CNG Back up switch Display ThI-H ThI-A (Humidity) Model ThI-R SRRM40ZA Tr BK 1 WH 2 RD 3 Power line (Outdoor unit) Y/GN RD RD BK BK CNC CNB R S J F (250V · 3.
134 1 2 3 1 2 3 Unit A Unit B Unit C N L 1 2 3 Power source 1 Phase 220/230/240V 50Hz Y/ GN WH BK WH Color mark Mark Color Black BK Blue BL Grey GR Orange OR Pink PK BL PK RD Y/ GN Fuse 250V 25A R1 PCB (POWER) SA NF Color Red White Yellow Yellow/Green S-A S-B S-C COM1 Mark RD WH Y Y/GN G S1 CT 20S CNB S2 R12 52X5-1 FMO CNC R4 N1 BK GR OR LED5 ERROR CND CND P1 RD DS1 Y EEV A CNS LED1 A CNM CNM – + + 2 1 N2 EEV B Y Y WH BL LED3 C CNT LED2 B CNN
4.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Remote Controller HI POWER operation indicator Indicators during HI POWER operation. FAN SPEED indicator ECONOMY operation indicator Indicators the ¡ for the fan speed which has been set. Indicators during ECONOMY operation. Operation switch over indicator Indicators the ¡ for the operation which has been set. ON-TIMER • OFF-TIMER indicator AIR FLOW indicator Indicator selected flap mode.
¡ SKM50 model RUN (HOT KEEP) lamp (green) • Illuminates during operation. • Flashing at stop blowing due to the hot keep. HI POWER lamp (green) Illuminates during HI POWER operation. RUN HI POWER TIMER ECONO TIMER lamp (yellow) Illuminates during TIMER operation. ECONOMY lamp (orange) Illuminates during ECONOMY operation. ¡ SRRM40 model RUN (HOT KEEP) lamp (green) RUN • Illuminates during operation. • Flashing at stop blowing due to the hot keep.
(4) Flap control Control the flap by AIRFLOW button on the wireless remote controller. (a) AUTO The flap will be automatically set to the angle of air flow best to operation. 1) Starting time of operation ¡ SKM22, 25, 28, 32, 40 models In case of cooling s and dry operation t In case of heating s operation t Sway operation Stops at the level position for one minute. Sway operation ¡ The flap operation as shown above will be repeated. ¡ The flap operation as shown above will be repeated.
(b) Memory flap (Excepted 22, 25models) While the flap is operating if the AIRFLOW button is pushed once, it stops swinging at an angle. As this angle is memorized in the microcomputer, the flap will be automatically set to the angle when next operation is started.
(b) SRRM model When the timer is set to "ON" at the operation changeover is in the cooling or the heating mode, and in the cooling or the heating mode at automatic operation, the pleasant reservation timer is actuated to start by the room temperature thermistor (Th1) at 5 to 80 minutes before the set time irrespective of the time set by the timer. Operation mode Operating start time (amount of time previous to set that operation begins) Room. temp thermistor (Th1) Heating Coolng Under 5˚C 80 mins.
(7) Heating Operation (a) Summary 1) Capacity control Model SCM68ZA Capacity 2.0 ~ 7.6 kW Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacity of the outdoor unit, the demand capacity will be proportionally distributed.
(iii) Finishing conditions When at least one of the hot stand-by cut conditions described below is met during the hot stand-by function is activated, the hot stand-by function becomes inoperable. 1) When the hot stand-by function is activated during the above-mentioned condition which was described in article 1 : 1 After 20 minutes elapsed since the power ON. 2 When the operation mode was changed from "STOP" to "COOLING" or "HEATING".
¡Hot keep M mode [During HI POWER operation (for 15 min.)] 8th speed 7th speed ¡ Values of a, b 6th speed 5th speed Indoor blower At 0 Hz command Other than 0 Hz command 4th speed 3rd speed a b 22 25 17 19 2nd speed 1st speed OFF a b 29 31 32 34 38 42 50 Indoor heat exchanger temp. (˚C) Note (1) Refer to the table shown above right for the values a and b.
3) Operation of function component in defrosting 80 sec. Outdoor unit frequency 3 minutes B Hz Max. 60Hz Decision frequency 0Hz 0Hz Outdoor unit fan According to outdoor unit frequency OFF 4-Way valve ON OFF 80 sec.
(b) (c) (d) (e) (f) (g) 2) Start of protection for compressor When the inverter decision frequency is 36 Hz or more, compressor protection starts. 1 Start of protection I (When the unit is started after 6 hours or more have elapsed since the last compressor stop.) After the compressor has been started, the frequency of the outdoor unit is maintained at a maximum of 60 Hz for 5 minutes, after which transition is made to the decision frequency.
(h) Current safe control 1) When the converter input current detected by the current sensor (CT) exceeds the set value, the frequency is reduced by 2 Hz. Checks are performed every second following this and if the current still exceeds the setting, the frequency is reduced by another 2 Hz. 2) When the frequency is 30 Hz or less, this control will operate four in one hour and then perform an abnormal stop. At the same time, LED 5 on the printed circuit board for the outdoor unit will flash 3 times at 0.
(m) Outdoor unit abnormal stop and compressor motor protection If the air conditioner is operating at an inverter frequency 28 Hz or more and an input current of 1 A or less is detected for 30 continuous seconds or more, a abnormal stop is performed. At the same time, LED 5 on the printed circuit board for the outdoor unit will flash 2 times at a 0.5 second interval every 8 seconds.
4.5 APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section.
4.5.1 Installation of indoor unit (1) Wall mounted type (SKM) (a) Caution for installation 1) The system should be applied to places as households, residences and the like. 2) The equipment shall be installed in accordance with national wiring regulations. 3) The connection to the fixed wiring of the mains supply must be made via a double pole isolating switch with a contact gap of at least 3mm in each pole.
2) Drilling of holes in the wall and fixture of sleeve ¡ The connecting wires may touch the metal inside the wall and cause danger so it is necessary to always use the sleeve. Indoor side Outdoor side Sleeve Sleeve Pipe Inclined plate 5° ø65 Wall thickness × 1.5cm ¡ Drill a hole with a 65 whole core drill. Putty Sealing plate Assembled state ¡ When the pipe is connected at the rear, cut off the lower and the right side portions of the sleeve collar (as shown by the broken line.
Cautions when piping from the left and the rear center of the unit [Top View] Left Side Piping Left rear piping Right Side Piping Right rear piping Left side piping Right side piping The piping can be removed from the rear, left, left rear, right and from under the unit. Right Rear Under Left rear Left [Procedure for exchanging the drain hose.] 1. Remove the drain hose. ¡ Loosen and remove the springtype clamp. 2. Remove the drain cap. ¡ Remove with your hand or a pair of pliers.
5) Securing the Indoor Unit to the Installation Board Installing steps Indoor unit Installation board Hook (2 locations) 1.Hook the upper part of the indoor unit to the installation board. Instalation board 2.The unit can be installed simply by gently pushing in the lower part. Wall Indoor unit base lower hook (2) Ceiling recessed type (SRRM) These instructions are for the installation of the main unit.
4) Installing the main unit a) Attach the washers and nuts to the ceiling suspension bolts. b) Attach the suspension tool to the above nuts, and tighten the nuts. M8 suspension bolt M8 nut M8 large washer (standard accessory) M8 large washer (standard accessory) M8 spring lock washer Main frame M8 nut c) If it is not leveled, the float switch may malfunction or may not start.
4.5.3 Installation of outdoor unit (1) Selection of installation location (Please install with the customer’s consent in a location that follows the conditions listed below.) (a) Where the following installation space is available, and where air does not gather. (b) Where rain and sunlight do not directly hit the unit, and where there is enough air circulation. (c) Also, where the unit cannot be buried by snow.
Securing the Unit ¡ Locations to secure the bolts. ¡ Use M10-M12 for the retaining bolts. ¡ Secure it firmiy so the unit will not fall during earthquakes and from sudden gusts of wind. Drainage ¡ There are 3 holes in the bottom panel of the outdoor unit to drain condensation. Removing the Outer Panel 2 Top panel 1 Service panel 1 Service panel ¡Remove the screws, and pull the panel toward the direction. 2 Top panel ¡Remove the panel when cheking the abnormal indicator LED during the protective function.
4.5.5 Electrical wiring Power source N L Circuit breaker UNIT A 1 2 3 UNIT B 1 2 3 UNIT C 1 2 3 1 2 3 UNIT A 1 2 3 UNIT B 1 2 3 UNIT C Earth leakage breaker (1) Connection of the power lines (a) This multi-type room air conditioner receives its power from outside. (b) It is necessary to use a single phase 220/230/240 V 50 Hz for the power supply. (c) An earth leakage breaker and a circuit breaker must be installed. Their capacities are listed below.
4.5.6 Refrigerant Piping (1) Limit The maximum permissible length of the refrigerant pipes for the outdoor units, and the maximum permissible height difference for the outdoor units are as shown below.
(2) Connection Indoor Outdoor Liquid side Gas side Gas side Liquid side ¡ Secure the nut with a specified tightening torque to avoid any gas leaks. ¡ Secure the nut with a specified tightening torque to avoid any gas leaks. ¡ When air purging with a vacuum pump, secure the nut with a specified tightening torque to avoid any gas leaks. ¡ When air purging with a refrigerant from an outdoor unit, just temporarily secure the nut. ¡ Specified tightening torques are as follows: Liquid side (ø 6.
(5) Heat insulation for joint Heat insulation for joints Vinyl tape Finish and fixing Cover the joint with insulation material for the indoor unit and tape it. Pipe clamp Pipes Crossover wires Position so the slit comes on top. Exterior tape Drain hose Tapping screw Apply exterior tape and shape along the place where the pipes will be routed. Secure to the wall with a pipe clamp. Be careful not to damage the pipes and the wires. 4.5.
4.5.
(c) Installation The following is the procedure for installing the air outlet grille for suspended ceiling (RKB12). (d) Installation procedure 1) Mount the air outlet duct to the indoor unit Tapping screw (ø 4 × 16) using the eight tapping screws. Motor cover 2) Remove the motor cover on the right side of the air outlet duct, connect the connecting wire for louver motor and secure with clamp.
(2) Air outlet grille for suspended ceiling (a) Part Number: RKB12 The air outlet grill for suspended ceiling is for mounting on the air outlet duct (RFD12) directly attached to the indoor unit. (b) Parts list Name Qty.
(3) Bottom air inlet grille set (a) Part number: RTS12 (b) Parts list Name Qty. Air inlet grille 1 Duct for air inlet grille 1 Tapping screw 10 Pan-head screws 4 Unit: mm (c) Installation 455 Indoor unit 2 10 762 (Ceiling opening dimensions) (d) Indoor unit 2 2 10 10 782 (Panel dimensions) Ceiling surface Installation procedure 1) Mount the duct for the air inlet grille to the indoor unit using the 10 tapping screws provided.
(c) Installation 357 (Suspension bolt pitch) Unit: mm 12 333 166.5 12 Suspension bolt M8 × 2 (Procured by customer) 166.5 83 91 45.5 45.5 52.5 52.5 90 147 242 ø 150 Round duct connection port 3 Air outlet chamber 10 Ceiling 15 10 377 (Ceiling opening dimension) 15 Air outlet panel 15 407 105 (Ceiling opening dimension) 135 15 (d) Installation procedure 1) Use the bolts (M8 × 2) to secure the suspension hardware so that it is 90 mm below the ceiling surface.
(5) Flexible duct Part number Length (m) S97682 1 S97683 2 S98223 3 S97684 4 Diameter (ø mm) Parts provided • Connecting bands (2) +4 153 –2 • Soft tape (2) (6) Duct joint for air outlet plate (a) Part number: RFJ22 The duct joint is to be used when connecting the flexible duct (ø 150 mm) to the indoor unit. (b) Part list Name Qty.
◆ Air flow and external static pressure characteristics (Heating: Hi) SRRM40ZA 60(6) Standard High 40(4) Standard Medium Standard Low Static pressure Pa (mmAq) 50(5) 30(3) 20(2) 8 9 10 11 Air flow (m3/min) ◆ Air outlet unit air flow and friction loss characteristics ● Air outlet unit (Part number: RTB12) (Air outlet chamber + Air outlet panel) ◆ Air inlet grille air flow and friction loss characteristics (Part number: RTS12) 30(3) Pressure loss Pa (mm Aq) Pressure loss Pa (mm Aq) 50(5)
(7) Drain up kit (a) Part No. : RDU12E (b) Accessories No. Name Qty. 1 Drain pump 1 2 Drain hose 1 3 Hose clamp 1 4 Tapping screw 4 (c) Installation of drain up kit 455 267 176 62 Max. 500 186 124 24 Control 224 Indoor unit 254 230 740 Unit: mm VIEW A Fitting for drain hose Vinyl chloride pipe VP-25 A (d) Installation of drain up kit 1) Fix the drain up kit on the right side of the inside unit with tap screws.
4) Use hard PVC general purpose pipes VP-25 sold on the market 3 Hose clamp for drain pipes after draining up. 5) Tighten the PVC pipe securely with the attached clamp after inserting it in the drain socket. 6) Drain hose The drain pipe must have downward inclination gradient of 1/ 100 or more, and take care not to make a trap or uphill pass.
4.6 MAINTENANCE DATA 4.6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct operations as mis-operations.
(2) Indication of self diagnosis Indoor unit indicator RUN lamp TIMER lamp Outdoor unit indicator (LED5) 1 time flash Comes on Stays off Indoor heat exchanger thermistor error Description of trouble 2 time flash Comes on Stays off Room temperature thermistor error 5 time flash Comes on Stays off Drain abnormality (1) 6 time flash Keeps flashing Keeps flashing Comes on 1 time flash 2 time flash Indoor fan motor error (2) Stays off Stays off Outdoor temperature thermistor error Stays
(3) Inspection procedures corresponding to detail of trouble [Broken thermistor wire, connector poor connection] Thermistor error NO Is connector connection good? Correct connection. YES NO Is thermistor resistance value good? Replace thermistor. YES Replace PCB. ◆ Discharge pipe thermistor temperature characteristics Temperature (˚C) Resistance (kΩ) Temperature (˚C) Resistance (kΩ) 0 164 70 8.7 5 127 75 7.3 10 99 80 6.2 15 78 85 5.3 20 62 90 4.5 25 50 95 3.
[Broken power transistor, broken compressor wire] Outdoor unit error NO Is output voltage applied to all 3 phases of power transistor? Defective inverter YES NO Is compressor wiring connected securely? Connect securely. YES Inspect compressor. (Broken coil wire) [Overload operation, compressor lock, overcharge] Over current NO Is refrigerant charge quantity adequate? Discharge refrigerant. YES NO Is outdoor ventilation condition good? Secure space for inlet and outlet. YES Inspect compressor.
[Indoor/outdoor printed circuit board defect Outdoor power source abnormality] Serial signal transmission abnormality Does the voltage between 2 and 3 on the indoor side oscillate between 0 and 12V? NO (Flashing) Are receiving lamps (LEDs 1 to 3) on? NO The indoor printed circuit board is defective. YES YES Does the voltage between 2 and 3 on the outdoor side oscillate between 0 and 12V? Outdoor printed circuit board defect. NO The power supply and signal wire are defective.
(5) How to make sure of remote controller (1) Is remote controller normal? NO Remote controller defects Note (1) How to check the remote controllre (a) Press the reset switch of the remote controller. (b) If all LCD are displayed after zero (0) display, it is YES basically normal. Again pushing operating switch YES Operating the unit? Abnormality is not found. NO Does backup switch operates? YES Operating the unit. Replace the display.
174 Inspect compressor.
175 1 2 3 1 2 3 1 2 3 Unit A Unit B Unit C N L Y/ GN WH BK WH BK BL PK RD Y/ GN Fuse 250V 25A G PCB (POWER) SA NF S-A S-B S-C COM1 S1 R1 Check fuse. There should be conductivity. CT 20S CNB S2 R12 52X5-1 Tester probe , . + (RD) + (OR) + (RD) + (GR) ~ (OR) – (BK) ~ (GR) – (BK) R4 N1 BK GR OR } LED5 ERROR CND CND P1 RD DS1 (When tester probes are inverted, the reading should be approx. 10~20Ω.
4.6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities......noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. ● Evacuation procedure (a) Check to ensure that there is no internal pressure in the unit.
