Page 2 - CONTENTS
118 CONTENTS 4.1 GENERAL INFORMATION ...................................................................... 119 4.1.1 Specific features ................................................................................ 119 4.1.2 How to read the model name .................................................
Page 3 - GENERAL INFORMATION; Connectable indoor capacity
119 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...
Page 5 - Models
121 Item Models SKM32ZA SKM40ZA SKM50ZA Cooling capacity W 3200 4000 5000 Heating capacity W 4500 5400 6700 Noise level Cooling Sound level dB Hi : 40 Lo : 30 Hi : 42 Lo : 31 Hi : 43 Lo : 31 Power level Hi : 54 Lo : 44 Hi : 56 Lo : 45 Hi : 57 Lo : 45 Heating Sound level Hi : 41 Lo : 32 Hi : 42 Lo : ...
Page 6 - Model
122 (b) Ceiling recessed type Model SRRM40ZA Item Model SRRM40ZA Cooling capacity W 4000 Heating capacity W 6000 Noise level Cooling Sound level dB Hi : 41 Lo : 33 Power level Hi : 55 Lo : 47 Heating Sound level Hi : 44 Lo : 34 Power level Hi : 58 Lo : 48 Exterior dimensions Height × Width × Depth m...
Page 8 - Operation data
124 (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 demandcapacity will be proportional...
Page 11 - Indoor unit; VIEW A
127 4.2.3 Exterior dimensions (1) Indoor unit Models SKM22ZA, 25ZA A 750 75 92 40 60 746.9 7.5 62 62 7.5 16 VIEW A 65 615 150 450 150 Room temp. thermistor Terminal block Piping for Gas ( Ø 9.52) 370 Piping for Liquid ( Ø 6.35) 420 Piping hole ( Ø 65) Piping hole ( Ø 65) Piping hole right (left) 178...
Page 12 - Room temp. thermistor
128 Model SKM50ZA Unit: mm Models SKM32ZA, 40ZA A 790 15 67 51 60 62 18 16 780 VIEW A 15 760 170 450 170 Room temp. thermistor Terminal block Piping for Gas ( Ø 12.7) 390 Piping for Liquid ( Ø 6.35) 440 Drain hose 600 ( Ø 16) Piping hole ( Ø 65) Piping hole ( Ø 65) Piping hole right (left) Unit: mm ...
Page 15 - obtained in the following way.; Net capacity = Capacity shown on specification; Air inlet temperature of
131 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 h...
Page 16 - ELECTRICAL DATA; Meaning of marks; Parts name
132 4.3 ELECTRICAL DATA Meaning of marks • Outdoor Unit • Indoor Unit FM I CF I SM Tr ZNR DM FS Parts name Fan motor Capacitor (for FM I ) Flap motor Transformer Varistor Drain motor Float switch Symbol Q F Th I -A Th I -R 52X 1 ~ 5 Th I -H Parts name Fan motor control triac Fuse Thermistor (room te...
Page 19 - CONT HI POWER ECONO; ON OFF TIMER; AUTO; OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER; Remote Controller; INVERTER
135 FAN SPEED ON/OFF MODE TEMP AIR FLOW SET TIMER TIMER ACL HI POWER ECONO CONT HI POWER ECONO ON OFF TIMER AUTO HI MED LO FAN SPEED indicator Indicators the ¡ for the fan speed which has been set. ON-TIMER • OFF-TIMER indicator FAN SPEED button Each time the button is pushed, the ¡ indicator is swi...
Page 20 - Operation; Operation starts in the same way as the previous operation.; RUN HI POWER
136 (3) Back-up switch When the remote controller become weak, or if the remote controller is lost or malfunctioning, this switch may be used to turn the unit on and off. (a) Operation Push the switch once to place the unit in the automatic mode. Push it once more to turn the unit off. (b) Detail of...
Page 23 - coefficient to the indoor unit demand frequency.; Operation of Major Functional Components in Cooling Mode
139 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. 2) Outdoor unit frequency control (28 ~ 120Hz) The decision frequency is based on the total indoor de...
Page 25 - described in article; After 20 minutes elapsed since the power ON.; When the outer air temperature thermister entered the OFF range.; Hot keep operation
141 1st speed ¡ Values of a, b a b At 0 Hz command 22 25 Other than 0 Hz 17 19 command Note (1) Refer to the table shown above right for the values a and b. ¡ Hot keep M mode [During HI POWER operation (for 15 min.)] Indoor blower Indoor heat exchanger temp. (˚C) 2nd speed 3rd speed 4th speed 5th sp...
Page 26 - When the outdoor heat exchanger thermistor temperature is –2; During defrosting acceleration; When the compressor is operating.; OFF; Normal mode
142 (f) Defrosting (i) When the following conditions are met, the defrosting operation will start. 1) During normal operation a) When 30 minutes has passed since the start of heating or 30 minutes after the last defrosting (Cumulative actual operating time of compressor other than the outdoor unit f...
Page 29 - Discharge pipe thermistor interrupt protection
145 (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) Wh...
Page 30 - (m) Outdoor unit abnormal stop and compressor motor protection
146 Outdoor unit frequency 4-Way valve (20S) EEVA EEVB EEVC Outdoor unit fan Functional components Operation Heating Cooling Heating If stopped by outdoor protection function. If restarted by operation switching. If stopped by indoor unit control. If permanent stop. Cooling Decision frequency 0 Hz A...
Page 31 - and; CAUTION; WARNING
147 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 ...
Page 32 - Caution for installation; gap of at least 3mm in each pole.; ) Fixing of installation Board
148 ¡ Horizontal level adjustment of the board is conductedwith four temporarily tightened screws. ¡ Adjust so that the board will be horizontal with thereference hole in the center. Reference hole ¡ Find the inside wall structures (pillar, etc.) and se- cure the board after checking the horizontal ...
Page 33 - ) Shaping the pipe and drain hose; Affix the connection wire using the wiring clamp.; Drill a hole with a 65 whole; ) Drilling of holes in the wall and fixture of sleeve
149 Use cables for interconnection wiring to avoid loosening of the wires.CENELEC code for cables Required field cables.H05 RNR4G1.5 (Example)H Harmonized cable type 05 300/500 volts R Natural-and/or synth. rubber wire insulation N Polychloroprene rubber conductors insulation R Stranded core 4 Numbe...
Page 34 - Drainage; Left Side Piping; Cautions when piping from the left and the rear center of the unit
150 ¡ Loosen and remove the spring-type clamp. ¡ Remove with your hand or a pairof pliers. ¡ Use a hexagonal wrench to correctlyinsert the drain cap which was re-moved in 2.Caution: Be careful because if the capis not inserted property, water leak mayoccur. ¡ Loosen the spring-type clamp andsecurely...
Page 35 - Installing steps; Hook the upper part; ) Securing the Indoor Unit to the Installation Board; Suspension bolt pitch; If steel embedded ceiling
151 Indoor unit Hook (2 locations) Installation board Instalationboard Indoor unitbase lower hook Wall Installing steps 1.Hook the upper part of the indoor unit to the installation board. 2.The unit can be installed simply by gently push-ing in the lower part. 5) Securing the Indoor Unit to the Inst...
Page 36 - Installation of remote controller; Mounting method of battery; Wireless receiver; ) Installing the main unit
152 5) Connecting the drain pipes a) Insert the drain hose as far as possible through the lower section of the side of the unit, and secure it with clamps.b) The drain pipes should be set in a downward slope (over 1/100), and it should not have any bumps or traps along its route. c) The indoor drain...
Page 38 - CURRENT LIMIT SW; Securing the Unit
154 CURRENT LIMIT SW ON OFF 11A MAX.AMP. SW5 SW6 SW5 SW6 8.5A SW5 SW6 4.5.4 Setting for current limit SW (for SCM68YA, cooling only type) ¡ 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 w...
Page 39 - N L; CENELEC code for cables required field cables.; Connecting the outside/inside crossover wires; and cause the operation to shut down.; Connection of the power lines; An earth leakage breaker and a circuit breaker must be installed.
155 4.5.5 Electrical wiring UNIT A 1 2 3 1 2 3 UNIT B UNIT A UNIT B 1 2 3 1 2 3 UNIT C UNIT C 1 2 3 1 2 3 Power source N L Earthleakagebreaker Circuitbreaker [POWER SUPPLY CODE] CENELEC code for cables required field cables. H05RNR3G 4.0 (e) After connecting the power supply wires, make sure to secu...
Page 40 - Connection of refrigerant piping; able as accessories must be applied to the gas side service valves.; A dimensions; Limit
156 (2) Connection of refrigerant piping ¡ The service valve corresponding to each indoor unit is as illustrated in the right figure. ¡ Regarding the change in the sizes of gas side pipes (usage of the variable joints); if a 3.2/ 4.0/5.0 kW class indoor unit (gas side pipe 12.7) is going to be conne...
Page 41 - Air purging; Liquid side; Additional refrigerant charge
157 (3) Air purging To protect the global environment, use a vacuum pump that do not release flourocarbon gas into the atmosphere. (a) Remove the cap on both gas and liquid sides before starting operation. (b) After completing the operation, do not forget to tighten the cap (gas may leak). (c) Condu...
Page 43 - Suspended ceiling; Air outlet duct
159 4.5.8 Installation of optional parts (Ceiling recessed type) Table of optional parts Examples of Installation (1) Air outlet duct (a) Part number: RFD12 The air outlet duct is used to mount to a unit when using the air outlet grille for suspended ceiling (RKB12). (b) Parts list Air outlet duct R...
Page 45 - Air outlet grille for suspended ceiling; Name; Air outlet grille
161 518 (Air outlet opening) 127 127 42 772 190 158 16 16 Air outlet grille Flat countersunk head screw Pan-head screw Air outlet grille Indoor unit Mounting hardware Wireless receiver (2) Air outlet grille for suspended ceiling (a) Part Number: RKB12 The air outlet grill for suspended ceiling is fo...
Page 46 - Air outlet chamber; Parts provide with air outlet unit for ceiling
162 (3) Bottom air inlet grille set (a) Part number: RTS12 (b) Parts list (c) Installation (d) Installation procedure 1) Mount the duct for the air inlet grille to the indoor unit using the 10 tapping screws provided. The tapping screws on the drain pan receiver side are also used for mounting the d...
Page 48 - Flexible duct; Part number
164 Indoor unit (Flat surface drawing) 215 310 215 125 230 97 455 570 310 130 130 97 Round duct connection port 95 95 190 ø 150 (5) Flexible duct (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. (...
Page 49 - per 1 bend
165 ◆ Air flow and external static pressure characteristics (Heating: Hi) SRRM40ZA ◆ 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: R...
Page 50 - Tapping screw
166 (7) Drain up kit (a) Part No. : RDU12E (b) Accessories (d) Installation of drain up kit 1) Fix the drain up kit on the right side of the inside unit with tap screws. 2) Insert the drain hose fully and securely to the drain sockets of the inside unit and the drain up kit. 3) Connect the drain up ...
Page 52 - MAINTENANCE DATA
168 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 ...
Page 53 - Indication of self diagnosis
169 (2) Indication of self diagnosis Indoor unit indicator RUN lamp 1 time flash 2 time flash 5 time flash 6 time flash Keeps flashing Keeps flashing Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on 1 time flash 2 time flash 1 time flash 2 time flash...
Page 54 - Inspection procedures corresponding to detail of trouble; Thermistor error; Thermistor temperature characteristics; Current cut
170 (3) Inspection procedures corresponding to detail of trouble Thermistor error [Broken thermistor wire,connector poor connection] Is connector connection good? YES YES NO NO Replace PCB. Is thermistor resistance value good? Correct connection. Replace thermistor. 30 25 20 15 10 5 30 20 10 40 50 6...
Page 55 - Outdoor unit e; rror
171 Outdoor unit e rror [Broken power transistor,broken compressor wire] Is output voltage applied to all 3phases of power transistor? YES YES NO NO Inspect compressor. (Broken coilwire) Is compressor wiring connectedsecurely? Connect securely. Over current [Overload operation, compressorlock, overc...
Page 59 - Outdoor unit inspection points; Check these points with the po
175 ● Inspection of resistance value of discharge - pipe thermistor. Remove the connector and check the resistance value. See the section of thermistor characteristics on page 170. ● Inspection of electronic expansion valve To test if there is voltage. (Voltage is only applied to the electronic expa...
Page 60 - Evacuation
176 Liquid side Gas side Check joint Service hose Charge hose Vacuumpump Refrigerantcylinder Gaugemanifold 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 refrige...
