Manual No.
CONTENTS 1 GENERAL INFORMATION ............................................................................... 1 1.1 Specific features ........................................................................................ 1 1.2 How to read the model name .................................................................... 1 2 SELECTION DATA ............................................................................................ 2 2.1 Specifications ................................................
1 GENERAL INFORMATION 1.1 Specific features (1) The long piping makes the location of the inside and units flexible.
2 SELECTION DATA 2.1 Specifications (1) Indoor unit Models SKM20ZF-S, 22ZF-S, 25ZF-S Models SKM20ZF-S SKM22ZF-S SKM25ZF-S Item Cooling capacity W 2000 2200 2500 Heating capacity W 3000 3200 3400 Sound level Hi : 37 Me : 30 Lo : 23 Cooling Power level Hi : 53 dB Noise level Sound level Hi : 39 Me : 33 Lo : 27 Power level Hi : 55 Heating Exterior dimensions 250 × 815 × 249 mm Height × Width × Depth Color Cool white Net weight kg 9.
Models SKM28ZF-S, 35ZF-S, 50ZF-S, Model SKM28ZF-S SKM35ZF-S SKM50ZF-S Item Cooling capacity W 2800 3500 5000 Heating capacity W 4000 4500 5800 Sound level Hi : 38 Me : 31 Lo : 24 Hi : 39 Me : 32 Lo : 25 Hi : 47 Me : 36 Lo : 23 Cooling Power level Noise level Hi : 54 Hi : 55 Hi : 62 dB Sound level Hi : 40 Me : 34 Lo : 28 Hi : 41 Me : 35 Lo : 29 Hi : 48 Me : 37 Lo : 27 Heating Power level Noise level Exterior dimensions Hi : 56 Hi : 57 250 × 815 × 249 mm Height × Width
Models STM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S Models STM25ZF-S STM35ZF-S STM50ZF-S STM60ZF-S Item Cooling capacity W 2500 3500 5000 6000 Heating capacity W 3400 4500 5800 6800 35 38 40 47 51 54 56 63 Sound level 35 38 40 47 Power level 51 54 56 63 Sound level Cooling Power level dB Noise level Heating 248 × 570 × 570 Main unit Exterior dimensions mm Height × Width × Depth 35 × 700 × 700 Panel Color – Main unit Net weight 14 14.5 kg Panel 3.
Models SRRM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S Models SRRM25ZF-S SRRM35ZF-S SRRM50ZF-S SRRM60ZF-S Item Cooling capacity W 2500 3500 5000 6000 Heating capacity W 3400 4500 5800 6800 38 40 46 49 53 55 60 63 Sound level 39 41 46 49 Power level 54 56 60 63 Sound level Cooling Power level dB Noise level Heating Exterior dimensions 230 × 740 × 455 mm Height × Width × Depth Color — Net weight kg 22.0 23.
(2) Outdoor unit Models SCM40ZF-S, 45ZF-S Models SCM40ZF-S SCM45ZF-S Item Cooling capacity W 4000 (1900 ~ 4900) 4500 (700 ~ 5600) Heating capacity W 5000 (1300 ~ 5200) 5600 (700 ~ 6800) Power source 1 Phase 220/230/240V 50Hz Cooling 970 (470 ~ 1470) 1390 (200 ~ 2160) Heating 1150 (450 ~ 1260) 1540 (200 ~ 2340) Cooling 4.5/4.3/4.1 6.4/6.1/5.9 5.3/5.1/4.8 7.1/6.8/6.
Models SCM48ZF-S, 60ZF-S Models SCM48ZF-S SCM60ZF-S Item Cooling capacity W 4800 (1100~6700) 6000 (1400~6900) Heating capacity W 6000 (780~7100) 7000 (750~7200) Power source 1 Phase 220/230/240V 50Hz Cooling Power consumption 1190 (200~2340) 1860 (400~3000) 1380 (200~2180) 1740 (320~2700) 5.2/5.2/5.0 8.5/8.2/7.8 W Heating Cooling Running current A Heating 6.3/6.1/5.8 Sound level Noise level 8.0/7.6/7.
Model SCM80ZF-S Model SCM80ZF-S Item Cooling capacity W Heating capacity W 8000 (1000~9300) 9300 (950~9500) Power source 1 Phase 220/230/240V 50Hz Cooling Power consumption 2380 (280~3200) W Heating 2430 (250~3500) Cooling Running current 10.9/10.5/10.0 A Heating 11.2/10.7/10.
(3) Operation data ¡ The combinations of the indoor units is indicated by numbers. They are read as follows. (Example) SKM22ZF-S / 22 SKM35ZF-S / 35 ¡ 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.
Model SCM45ZF-S (a) Heating Indoor unit combination 1 room 2 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) A room B room 20 3.0 22 25 3.2 3.4 28 35 20+20 20+22 20+25 Power consumption (W) Standard current (A) Min. Standard Max. 220V 230V 240V 200 1050 1350 4.8 4.6 4.4 200 200 1120 1190 1380 1450 5.1 5.5 4.9 5.2 4.7 5.0 4.3 4.7 6.8 6.8 6.8 200 200 450 450 450 1400 1590 1380 1400 1430 1520 1660 2340 2340 2340 6.4 7.3 6.3 6.4 6.6 6.1 7.0 6.1 6.1 6.
Model SCM48ZF-S (a) Heating Indoor unit combination 1 room 2 room 3 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) Power consumption (W) Standard current (A) Min. Standard Max. 220V 230V 240V 3.6 200 1040 1340 4.8 4.6 4.4 3.7 4.4 200 230 1130 1290 1390 1730 5.2 5.9 5.0 5.7 4.8 5.4 4.0 4.5 5.8 5.9 6.0 4.5 5.2 6.6 6.6 6.6 230 250 270 270 300 1460 1860 1710 1760 1830 1780 2180 2180 2180 2180 6.7 8.5 7.9 8.1 8.4 6.4 8.2 7.5 7.7 8.0 6.1 7.8 7.2 7.4 7.
Model SCM48ZF-S (b) Cooling Indoor unit combination 1 room 2 room 3 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) Power consumption (W) Standard current (A) Min. Standard Max. 220V 230V 240V 200 640 800 2.9 2.8 2.7 200 230 760 950 840 1030 3.5 4.4 3.3 4.2 3.2 4.0 3.0 3.6 4.9 5.0 5.4 230 250 330 330 360 1120 1570 1180 1250 1350 1270 1640 1700 1750 1980 5.1 7.2 5.4 5.7 6.2 4.9 6.9 5.2 5.5 5.9 4.7 6.6 5.0 5.3 5.7 4.6 5.0 4.4 4.6 4.7 5.1 5.8 5.9 5.
Model SCM60ZF-S (a) Heating Indoor unit combination 1 room 2 room 3 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) Power consumption (W) Standard current (A) Min. Standard Max. 220V 230V 240V 320 1030 1160 4.7 4.5 4.3 320 320 1100 1200 1200 1300 5.1 5.5 4.8 5.3 4.6 5.1 4.2 4.6 6.2 6.9 6.4 320 320 320 320 330 1450 1750 2100 2600 1300 1550 1800 2400 2650 2300 6.7 8.0 9.6 11.9 6.0 6.4 7.7 9.2 11.4 5.7 6.1 7.4 8.8 10.9 5.5 5.1 5.2 5.4 6.0 6.6 6.7 6.
Model SCM60ZF-S (a) Heating Indoor unit combination 3 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) Power consumption (W) Standard current (A) Min. Standard Max. 220V 230V 240V 7.2 440 1850 2700 8.5 8.1 7.8 7.2 7.2 500 500 1740 1950 2700 2700 8.0 9.0 7.6 8.6 7.3 8.2 7.0 7.0 7.0 7.1 7.1 7.2 7.2 7.2 7.2 7.2 440 440 440 500 500 1750 1850 1950 2050 2050 2700 2700 2700 2700 2700 8.0 8.5 9.0 9.4 9.4 7.7 8.1 8.6 9.0 9.0 7.4 7.8 8.2 8.6 8.6 1.7 1.7 1.9 1.
Model SCM60ZF-S (b) Cooling Indoor unit combination 1 room 2 room 3 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) Power consumption (W) Standard current (A) Min. Standard Max. 220V 230V 240V 400 660 720 3.0 2.9 2.8 400 400 720 800 750 830 3.3 3.7 3.2 3.5 3.0 3.4 3.0 3.6 5.1 6.1 4.2 400 400 400 400 410 950 1300 2200 2700 1320 1050 1350 2250 2800 1430 4.4 6.0 10.1 12.4 6.1 4.2 5.7 9.7 11.9 5.8 4.0 5.5 9.3 11.4 5.6 4.2 4.5 4.8 5.5 6.0 6.6 4.4 4.7 4.
Model SCM60ZF-S (b) Cooling Indoor unit combination 3 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) Power consumption (W) Standard current (A) Min. Standard Max. 220V 230V 240V 620 1600 3000 7.3 7.0 6.7 680 680 1860 2000 3000 3000 8.5 9.2 8.2 8.8 7.8 8.4 6.9 6.9 6.9 6.9 6.9 620 620 620 680 680 1500 1550 1620 1860 2000 3000 3000 3000 3000 3000 6.9 7.1 7.4 8.5 9.2 6.6 6.8 7.1 8.2 8.8 6.3 6.5 6.8 7.8 8.4 5.4 5.6 6.0 6.3 5.8 6.2 6.9 6.9 6.9 6.9 6.9 6.
Model SCM80ZF-S (a) Heating Indoor unit combination 1 room 2 room 3 room Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW) A room B room C room D room 20 3.0 22 25 3.2 3.4 28 35 50 60 20+20 4.0 4.5 5.8 6.8 2.70 – – – – – – – 2.70 20+22 20+25 20+28 20+35 20+50 20+60 2.67 2.62 2.58 2.51 2.37 2.08 2.93 3.28 3.62 4.39 5.93 6.23 22+22 22+25 22+28 22+35 2.90 2.86 2.82 2.74 2.90 3.24 3.58 4.36 22+50 22+60 25+25 25+28 2.54 2.23 3.20 3.16 5.76 6.07 3.20 3.
Model SCM80ZF-S (a) Heating Indoor unit combination 3 room 4 room 22+22+22 22+22+25 22+22+28 22+22+35 22+22+50 22+22+60 22+25+25 22+25+28 22+25+35 22+25+50 22+25+60 22+28+28 22+28+35 22+28+50 22+28+60 22+35+35 22+35+50 22+35+60 22+50+50 22+50+60 25+25+25 25+25+28 25+25+35 25+25+50 25+25+60 25+28+28 25+28+35 25+28+50 25+28+60 25+35+35 25+35+50 25+35+60 25+50+50 25+50+60 28+28+28 28+28+35 28+28+50 28+28+60 28+35+35 28+35+50 28+35+60 28+50+50 35+35+35 35+35+50 35+35+60 35+50+50 20+20+20+20 20+20+20+22 20+20
Model SCM80ZF-S (a) Heating Indoor unit combination 20+20+25+35 20+20+25+50 20+20+25+60 20+20+28+28 20+20+28+35 20+20+28+50 20+20+28+60 20+20+35+35 20+20+35+50 20+20+35+60 20+22+22+22 20+22+22+25 20+22+22+28 20+22+22+35 20+22+22+50 20+22+22+60 20+22+25+25 20+22+25+28 20+22+25+35 20+22+25+50 20+22+25+60 20+22+28+28 20+22+28+35 20+22+28+50 20+22+28+60 20+22+35+35 20+22+35+50 20+25+25+25 20+25+25+28 20+25+25+35 4 20+25+25+50 room 20+25+25+60 20+25+28+28 20+25+28+35 20+25+28+50 20+25+28+60 20+25+35+35 20+25+35+
Model SCM80ZF-S (a) Heating Indoor unit combination 4 room 22+25+25+25 22+25+25+28 22+25+25+35 22+25+25+50 22+25+25+60 22+25+28+28 22+25+28+35 22+25+28+50 22+25+28+60 22+25+35+35 22+25+35+50 22+28+28+28 22+28+28+35 22+28+28+50 22+28+35+35 22+28+35+50 22+35+35+35 25+25+25+25 25+25+25+28 25+25+25+35 25+25+25+50 25+25+25+60 25+25+28+28 25+25+28+35 25+25+28+50 25+25+35+35 25+25+35+50 28+28+28+28 28+28+28+35 28+28+28+50 28+28+35+35 28+35+35+35 Cooling capacity (kW) Room cooling capacity (kW) Total capacity (k
Model SCM80ZF-S (b) Cooling Indoor unit combination 20 1 room 2 room 3 room 22 25 28 35 50 60 20+20 20+22 20+25 20+28 20+35 20+50 20+60 22+22 22+25 22+28 22+35 22+50 22+60 25+25 25+28 25+35 25+50 25+60 28+28 28+35 28+50 28+60 35+35 35+50 35+60 50+50 50+60 20+20+20 20+20+22 20+20+25 20+20+28 20+20+35 20+20+50 20+20+60 20+22+22 20+22+25 20+22+28 20+22+35 20+22+50 20+22+60 20+25+25 20+25+28 20+25+35 20+25+50 20+25+60 20+28+28 20+28+35 20+28+50 20+28+60 20+35+35 20+35+50 20+35+60 20+50+50 20+50+60 Cooling
Model SCM80ZF-S (b) Cooling Indoor unit combination 22+22+22 22+22+25 22+22+28 22+22+35 22+22+50 22+22+60 22+25+25 22+25+28 22+25+35 22+25+50 22+25+60 22+28+28 22+28+35 22+28+50 22+28+60 22+35+35 22+35+50 22+35+60 22+50+50 22+50+60 25+25+25 25+25+28 25+25+35 3 room 25+25+50 25+25+60 25+28+28 25+28+35 25+28+50 25+28+60 25+35+35 25+35+50 25+35+60 25+50+50 25+50+60 28+28+28 28+28+35 28+28+50 28+28+60 28+35+35 28+35+50 28+35+60 28+50+50 35+35+35 35+35+50 35+35+60 35+50+50 20+20+20+20 20+20+20+22 20+20+20+25 20+
Model SCM80ZF-S (b) Cooling Indoor unit combination 20+20+25+35 20+20+25+50 20+20+25+60 20+20+28+28 20+20+28+35 20+20+28+50 20+20+28+60 20+20+35+35 20+20+35+50 20+20+35+60 20+22+22+22 20+22+22+25 20+22+22+28 20+22+22+35 20+22+22+50 20+22+22+60 20+22+25+25 20+22+25+28 20+22+25+35 20+22+25+50 20+22+25+60 20+22+28+28 20+22+28+35 20+22+28+50 20+22+28+60 20+22+35+35 20+22+35+50 20+25+25+25 20+25+25+28 20+25+25+35 4 20+25+25+50 room 20+25+25+60 20+25+28+28 20+25+28+35 20+25+28+50 20+25+28+60 20+25+35+35 20+25+35+
Model SCM80ZF-S (b) Cooling Indoor unit combination 22+25+25+25 22+25+25+28 22+25+25+35 22+25+25+50 22+25+25+60 22+25+28+28 22+25+28+35 22+25+28+50 22+25+28+60 22+25+35+35 22+25+35+50 22+28+28+28 22+28+28+35 22+28+28+50 22+28+35+35 22+28+35+50 4 room 22+35+35+35 25+25+25+25 25+25+25+28 25+25+25+35 25+25+25+50 25+25+25+60 25+25+28+28 25+25+28+35 25+25+28+50 25+25+35+35 25+25+35+50 28+28+28+28 28+28+28+35 28+28+28+50 28+28+35+35 28+35+35+35 Cooling capacity (kW) Room cooling capacity (kW) Total capacity (kW)
2.
2.3 Exterior dimensions (1) Indoor unit Models SKM20ZF-S, 22ZF-S, 25ZF-S, 28ZF-S, 35ZF-S, 50ZF-S Unit : mm A 249 815 3 9 250 60 Piping hole right(left) 117.5 580 450 216.5 Terminal block 45 148.5 450 216.5 236.1 18 Remote control 788 5 14.5 60 45 (20,22,25,28,35:50: ø9.52 ø12.7) 397.1 60 45 Piping for Gas 67.5 53.5 56 5.7 44.5 44.5 175 8.2 47.2 150 148.5 42.7 117.5 Piping for Liquid 465.1 (ø6.
Models SRRM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S 740 670 (Suspension bolts pitch) 35 35 455 515 (Suspension bolts pitch) 30 325 255 455 Controller Hanging bolt (M8 × 4) 106 30 740 Description Model 25,35ZF-S 50,60ZF-S A Gas pipe connecting port ø9.52(Flare) ø12.7(Flare) ø6.
Model SCM80ZF-S Drain holes Unit : mm 60 310 61 150 19 61 340 380 399 47.5 15 19 223 580 880 150 10 Liquid line service valve valve C unit (ø6.35) Gas line service valve valve D unit (ø9.52) Gas line service valve valve C unit (ø9.52) Liquid line service valve valve B unit (ø6.35) Liquid line service valve Gas line service valve valve B unit (ø9.52) Gas line service valve valve A unit (ø9.52) 24.1 110.4 52 52 52 52 52 52 742.2 52 185 Liquid line service valve valve D unit (ø6.
Sensor (ThI-A) - 29 - Liquid line Heat exchanger Indoor unit Gas line (ø6.35) (ø6.35) (ø9.52) (ø9.
Sensor (ThI-A) - 30 - Liquid line Heat exchanger Indoor unit Gas line (ø6.35) (ø6.35) (ø9.52) (ø9.
- 31 - Liquid line Sensor (ThI-A) Sensor (ThI-R1) Indoor Unit Sensor (ThI-R2) Gas line EEVB EEVC (ø6.35) Strainer (ø6.35) (ø6.35) Service valve (Liquid) Suction Check joint Sensor (Tho-C) Capillary tube 4way valve Electronic expansion valve EEVA Sensor (ThO-D) Discharge Oil separator Service valve (Gas) Compressor Heat exchanger (ø9.52 ) (ø9.52 ) (ø9.
- 32 - Liquid line Sensor (ThI-A) Sensor (ThI-R1) Indoor Unit Sensor (ThI-R2) Gas line EEVC Electronic expansion valve EEVA (ø6.35) Gas line 22, 25, 28, 35 type : ø9.52 50, 60 type : ø12.7 Sensor (Tho-C) Capillary tube Accumlator EEVB Strainer Service valve (Liquid) Suction Discharge Muffler Check joint 4way valve (ø6.35) (ø6.35) Sensor (ThO-D) Service valve (Gas) Compressor Heat exchanger (ø9.52 or ø12.7) (ø9.52 or ø12.7) (ø9.52 or ø12.
- 33 - Liquid line Sensor (ThI-A) Sensor (ThI-R1) Indoor Unit Sensor (ThI-R2) Gas line Discharge Compressor Check joint 4way valve Sensor (ThO-C) Strainer Capillary tube EEVD EEVC EEVB Suction Accumlator Electronic Service valve expansion valve (Liquid) EEVA (ThO-D) Sensor Oil separator Service valve (Gas) Gas line 22, 25, 28, 35 type : ø9.52 50, 60 type : ø12.7 (ø6.35) (ø6.35) (ø6.35) (ø6.35) Heat exchanger (ø9.52 or ø12.7) (ø9.52 or ø12.7) (ø9.52 or ø12.7) (ø9.52 or ø12.
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 SCM40ZF-S, 48ZF-S, 80ZF-S, 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.
SCM45ZF-S, 60ZF-S 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. Cooling operation Applicable range 43 40 35 30 25 21 16 18 20 Indoor air D.B. temperature °C D.B. Heating operation Indoor air W.B. temperature °C W.B. 22 24 ISO-T1 Standard Condition 30 25 20 15 20 -10 -5 0 5 Outdoor air W.B. temperature °C W.B.
3 ELECTRICAL DATA Meaning of marks • Outdoor Unit Symbol CM FMO CFO L DS1 Q11 Parts name Compressor motor Fan motor Capacitor (for FMO) Reactor Diode stack Power transistor Symbol EEVA ~ D 20S Tho-A Tho-R Tho-D Tho-C Parts name Electronic expansion valve 4 way valve (coil) Sensor (outdoor air temp.) Sensor (outdoor H.X temp.) Sensor (discharge pipe temp.) Sensor (suction pipe temp.
Model SKM50ZF-S TB Y/GN RD 3 WH 2/N BK 1 FMI BL YL WH BK RD J Y/G RD CNU 6 5 BK N 52C-4 WH HEAT EXCHANGER G F (250V 3.
Models STM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S SM FMI RD BK WH YL BL Control box 1 3 4 5 6 CNM YL DM CNU RD WH CNB BK CNQ S/N WH ZNR R/L BK F (250V 3.
UNIT B UNIT A T3 T2 - 39 - Y/G Y/G BK WH BR BK WH RD Y/G WH Color symbol Black BK Blue BL Brown BR Gray GR Orange OR Red RD White WH Y/G Yellow/Green 1 2 3 1 2 3 EARTH N L G2 CNP CNO G3 N-1 FUSE 250V 15A BK L-1 BK FMo CNT LED E ERROR (Red) AC.N AC.L BL GR AC.N AC.
40 - 1 2 3 UNIT C Y/G Y/G BK WH BL BK WH BR BK WH RD Y/G WH FUSE 250V 15A BK BK Color symbol Black BK Blue BL Brown BR Gray GR Orange OR Red RD White WH Y/G Yellow/Green 1 2 3 1 2 3 EARTH N L UNIT B UNIT A T2 T1 G2 CNR CNP CNO G3 N-1 L-1 FMo CNT LED E ERROR (Red) AC.N AC.L BL GR AC.N AC.
41 - 1 2 3 UNIT C Y/G Y/G BK WH BL BK WH BR BK WH RD Y/G WH FUSE 250V 20A BK BK Color symbol Black BK Blue BL Brown BR Gray GR Orange OR Red RD White WH Y/G Yellow/Green 1 2 3 1 2 3 EARTH N L UNIT B UNIT A T2 T1 G2 CNR CNP CNO G3 N-1 L-1 FMo CNT LED E ERROR (Red) AC.N AC.L BL GR AC.N AC.
- 42 - UNIT D UNIT C UNIT B UNIT A T5 T4 T3 T2 Y/G Y/G BK WH YL Y/G BK WH BL Y/G BK WH BR BK WH RD Color symbol Black BK Blue BL Brown BR Gray GR Orange OR RD Red WH White Yellow YL Y/G Yellow/Green 1 2 3 EARTH 1 2 3 EARTH 1 2 3 EARTH 1 2 3 EARTH L N WH EARTH Y/G Y/G FUSE 250V 20A BK BK Y/G G2 CNS CNR CNP CNO L-1 N-1 G3 FMo CNT LED E ERROR (Red) AC.N AC.L BL GR AC.N AC.
4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch (1) Wireless remote control Models All models S Operation section FAN SPEED button Each time the button is pushed, the cator is switched over in turn. OPERATION MODE select button indi- Each time the button is pushed, the cator is switched over in turn. indi- ON/OFF button HI POWER button Press for starting operation, press again for stopping. This button changes the HIGH POWER mode.
(2) Wired remote control (Optional parts)......STM, SRRM only The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation. Characters displayed with dots in the liquid crystal display area are abbreviated. Note (1) The STM, SRRM models don't support the switches and functions displayed in [ ]. Pull the cover downward to open it.
(3) Unit indication section Models SKM20ZF-S, 22ZF-S, 25ZF-S, 28ZF-S, 35ZF-S, 50ZF-S RUN (HOT KEEP) light (green) • Illuminates during operation. • Blinks at air flow stop due to the ‘HOT KEEP’. TIMER light (yellow) Illuminates during TIMER operation. HI POWER light (green) Illuminates during HIGH POWER operation. ECONO light (orange) Illuminates during ECONOMY operation. Models STM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S RUN (HOT KEEP) light (green) ECONO light (orange) • Illuminates during operation.
4.2 Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off. (1) Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. (2) Details of operation The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes.
4.4 Power blackout auto restart function (1) Power blackout auto restart function is that records the operational status of the air-conditioner immediately prior to it being switched off by a power cut, and then automatically resumes operations at that point after the power has been restored.
(2) Memory flap 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. ¡ Recommendable stopping angle of the flap ¡ SKM model COOL•DRY HEAT Horizontal blowing Slant forward blowing ¡ STM model COOL•DRY HEAT Horizontal blowing Slant forward blowing (3) Swing flap Flap moves in upward and downward directions continuously. 4.
◆STM, SRRM models (rps) Model (Indoor) 25 35 Automatic 12 ~ 54 12 ~ 99 (12~ 90) High 12 ~ 54 12 ~ 99 (12~ 90) Medium 12 ~ 40 12 ~ 70 12 ~ 42 Operation Mode Low 12 ~ 27 Hi power 54 90 Econo 12 ~ 40 12 ~ 70 Note (1) Values in ( ) are for type SRRM.
◆STM, SRRM models (rps) Model (Indoor) 25 35 50 60 Automatic 5 ~ 25 5 ~ 46 (5~ 42) 7 ~ 59 7 ~ 64 High 5 ~ 25 5 ~ 46 (5~ 42) 7 ~ 59 7 ~ 64 Medium 5 ~ 18 5 ~ 32 7 ~ 42 7 ~ 47 7 ~ 27 Operation Mode Low 5 ~ 12 5 ~ 19 7 ~ 24 Hi power 25 42 59 64 Econo 5 ~ 18 5 ~ 32 7 ~ 42 7 ~ 47 Note (1) Values in ( ) are for type SRRM.
4.8 Heating operation (1) Summary (a) Capacity control Model SCM40ZF-S SCM45ZF-S SCM48ZF-S SCM60ZF-S SCM80ZF-S Capacity 1.3 ~ 5.2 kW 0.7 ~ 6.8 kW 0.78 ~ 7.1 kW 0.75 ~ 7.2 kW 0.95 ~ 9.5 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.
◆STM, SRRM models (rps) Model (Indoor) 25 35 Automatic 12 ~ 87 12 ~ 105 High 12 ~ 87 12 ~ 105 Medium 12 ~ 63 12 ~ 78 12 ~ 45 Operation Mode Low 12 ~ 37 Hi power 87 105 Econo 12 ~ 63 12 ~ 78 (c) SCM60ZF-S ◆SKM model (rps) Model (Indoor) 20 22 25 28 35 50 Automatic 7 ~ 46 7 ~ 47 7 ~ 47 7 ~ 48 7 ~ 53 9 ~ 85 High 7 ~ 46 7 ~ 47 7 ~ 47 7 ~ 48 7 ~ 53 9 ~ 85 Medium 7 ~ 31 7 ~ 32 7 ~ 33 7 ~ 34 7 ~ 35 9 ~ 37 Low 7 ~ 18 7 ~ 18 7 ~ 19 7 ~ 20 7 ~ 21 9 ~ 23 Operat
(3) Operation of major functional components in heating mode Functional components Operation Failure (Outdoor unit) Thermostat OFF (All indoor units) See preceding table 0 (All indoor units) According to mode switching Hot Keep According to mode switching Hot Keep Automatic According to command speed Hot Keep According to command speed Hot Keep OFF According to outdoor unit speed OFF Command speed Indoor unit fan Fan, stop, abnormal stop Thermostat OFF (Some of indoor units) (Some of indoo
3) Operation of function component in defrosting 100 sec. 120 sec. R1rps Decision rps R2rps After compressor software has started Outdoor unit speed 0rps Decision rps F1 F1 Outdoor unit fan Notes (1) Indoor unit fan is in response to Hot Keep. According to rps OFF 4-way valve ON OFF 470 pulse fully opened Electronic expansion valve EEV (Operating unit) 300 pulse X1 pulse 250 pulse EEV control X2 pulse EEV control 50 sec.
◆SCM60ZF-S Outdoor unit speed R1 (rps) 2-room 35 1-room 20 3-room 50 Operating unit 1-room 15 X1 pluse 2-room 160 1-room 180 R2 (rps) 2-room 25 3-room 150 Outdoor unit fan F1 3-room 35 6th speed X2 pluse 2-room 115 1-room 140 3-room 110 ◆SCM80ZF-S Outdoor unit speed 1-room 30 R1 (rps) 2-room 3-room 35 50 Operating unit 1-room 99 4-room 65 1-room 20 X1 pluse 2-room 3-room 94 91 Outdoor unit fan F1 R2 (rps) 2-room 3-room 25 35 4-room 90 1-room 89 4-room 45 6th speed X2 pluse 2-room
4.10 Determining the operating mode The cooling and heating operating modes are the remote control switch mode that have been previously determined. If a mode differing from these is selected after this, the selected mode will appear in the display of the remote control, but only the fan will operate.
4.12 Operation permission/prohibition control (STM, SRRM only) The air conditioner operation is controlled by releasing the jumper wire (J3) on the indoor control board and inputting the external signal into the CnT. (1) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire (J3) on the indoor control board.
4.13 Control and protection functions (1) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) ⽧ (a) Operating condition After the indoor command speed is other than 0 rps for 9 minutes, when the indoor heat exchanger (ThI-R1) is 2°C or lower for 1minute continuously. (b) Detail of operation 1) The indoor command speed is minimum rps for 5 minutes. 2) After 1) above, if the indoor heat exchanger is 2°C or lower, the speed is 0 rps.
(3) Dew condensation prevention control for the cooling and dehumidifying operation (STM, SRRM type only) ⽧ (a) Operation condition: During cooling or dehumidifying operation, 20 minutes elapsed after starting (with indoor command speed something other than 0 rps), under the following conditions.
(5) Freezing cycle system protective control (a) Operating conditions: When both of following conditions have continued for more than 5 minutes later than 5 minutes after the start of operation. 1) Indoor command speed is higher than 0 rps 2) During cooling, dehumidifying: Indoor heat exchanger temperature - Room temperature > –4°C (b) Detail of operation 1) Indoor unit The command speed is forced to operate at 16 rps.
(9) Cooling low load protection control (SCM45ZF-S, SCM60ZF-S only) (a) Operating condition: During cooling operation , when the outdoor air temperature (ThO-A) is 22°C or lower for 3 minutes continuously. (b) Detail of operation: Taking the lower limit of decision speed range at 22 rps (60 type: 20 rps). (c) Reset condition: When the outdoor air temperature (ThO-A) is 24°C or higher.
(11) Heating overload protection control Indoor unit side (a) Operating conditions: When the outdoor unit is heating at a decision speed other than 0 rps and the outdoor air temperature (detected by ThO-A) rose beyond 17°C for 2 minutes continuously. (b) Detail of operation 1) Indoor fan speed is raised forcibly by 1 step. 2) Taking the upper limit of control speed range at 80 (50, 60 type: 60) rps, if the indoor command speed exceeds the upper limit, the upper limit value is maintained.
(16) Compressor overheat protection The detection temperature of the discharge pipe sensor (Tho-D) is used to prevent oil deterioration and damage to the motor wire due to overheating of the compressor. (a) If Tho-D becomes > =110 °C, the compressor is stopped. After the stop mode has been activated, the compressor will be restarted when Tho-D becomes < 80 °C. However, if it is restarted repeatedly within an interval of 1 hour, it will not start on the 3 times.
(19) Compressor lock If the motor for the compressor does not turn 1/12 revolution 0.044 seconds after it has been started, it is determined that a compressor lock has occurred and the compressor is stopped. (20) Discharge pipe sensor disconnection protection control (a) When the decision speed is other than 0 rps. 1) ThO-D(10)-ThO-D(0) < A °C, and ThO-D(10)-ThO-A(10) < B °C The decision speed is set on C rps for 5 minutes. After 5 minutes, the decision speed is set on D rps for E minutes.
(22) Regulation of outdoor air flow ◆SCM40ZF-S (a) The fan operates as follows according to the decision speed. (Except during defrost.) Cooling Decision speed Outdoor fan speed Heating Less than 55 55 or more Less than 60 60 or more 5th speed 6th speed 5th speed 6th speed (b) If the outdoor unit’s fan speed drops, the outdoor fan is run for 1 minute at that speed. ◆SCM45ZF-S (a) The fan operates as follows according to the decision speed. (Except during defrost.
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.
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.
3) Mounting of interconnecting wires (Field wiring) a) Remove the lid. b) Remove the terminal block cover. c) Connect the connection wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables. H05RNR4G1.5 (Example) H Harmonized cable type 05 300/500 volts R Natural-and/or synth.
Drainage ¡ The drain hose must be fit with a downward slope. ¡ Do not set the drain hose like the following illustrations. under 5 cm Too high The end of the drain hose is touching the water. It curves like a wave. Smell from sewerage drains. The gap to the The end of the ground is less drain hose is than 5 cm. touching the sewage drains. ¡ Pour water in the drain pan below the heat exchanger and confirm that the water is drained outside.
Installation of indoor unit 1) Installation dimensions Ceiling opening 660 (For conventional ceiling) Hanging bolt pitch 530 Unit: mm 68 150 541 319 Hanging bolt pitch 530 350 PANEL Control box Air outlet 450 202 570 243 104 93 A B C D E 250 196 C 35 45 or more Air intake 43 Mark E 197 137 B A 413 700 Drain hose(accessory) To be installed at site Inspection port (For conventional ceiling) 450 Hanging fixture Description Model 25, 35ZF-S 50, 60ZF-S ø9.52 (Flare) ø12.
1) Connect the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be poor, and it is dangerous as the terminal block may heat up and catch fire. 2) Take care not to confuse the terminal numbers for indoor and outdoor connections. 3) Affix the connection wire using the wiring clamp. c) Attach the control lid.
B. When embedded into ceiling 1. Determine the positions of hanging bolts (530 × 530). The pitch center of a hanging bolt must accord with the center of the unit. 2. Use four hanging bolts, each fastened in such a manner that it can withstand pull force of 50kgf. 3. Fix the unit as per A-e ~ g previous page. Notes • When a hanging bolt exceeds 1.3 m in length, use an M10 bolt and give it reinforcements such as braces.
C. Attaching the panel 1) (It is attached to the panel.) 1 Hook 1 piece 2 Chain 2 pieces 3 Bolt 4 pieces For hoisting the panel 4 Screw 1 piece For attaching a hook 5 Screw 2 pieces For attaching a chain For fixing temporarily a) Make sure that the unit main body is positioned at the correct height and the opening on the ceiling is made to the correct dimensions with the level gauge supplied with the main body. Remove the level gauge before you attach the panel.
k) Attach two chains to the intake grille with two screws. [ Figure 7] l) Replace the corner panels. Please also close a chain with a screw together then. m) Close the intake grille. Chain Chain [Figure 7] (3) Ducted type (SRRM) (a) Caution for installation Install the unit with the customer's consent at location that meets the following conditions. 1) Where there are no barriers to the breeze, and where cool/hot air may diffuse throughout the room.
3) Preparations for the Main Frame Mounting of interconnecting wires (Field wiring) a) Remove the control lid. b) Connect the connection wire securely to the terminal block. Control lid Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables. H05RNR4G1.5 (Example) H Harmonized cable type 05 300/500 volts R Natural-and/or synth.
6) Installing the Main Unit 7) Securing the Wireless Receiver • Attach the washers and nuts to the ceiling hanging bolts. • Attach the hanging tool to the above nuts, and tighten the nuts. M8 hanging bolt Flat head machine screw M8 nut Wireless receiver Installation frame M8 large washer (standard accessory) • With a(–)screwdriver, secure the installation frame to Main frame M8 large washer (standard accessory) M8 spring lock washer the grooves on either sides of the wireless receiver.
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.
5.4 Electrical wiring unit A unit B unit C unit D Outdoor unit Circuit breaker Earth leakage breaker Indoor unit unit A unit B unit C unit D (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 25A. (d) Use the power supply wires specified below.
5.5 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 Liquid side Gas 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. ¡ Specified tightening torques are as follows: Liquid side (ø 6.35): 17mm in width across flat of the flare nut: 14.0-18.0 N·m (1.4-1.8 kgf·m) Gas side (ø 9.52): 22mm in width across flat of the flare nut: 34.0-42.0 N·m (3.4-4.2 kgf·m) Gas side (ø 12.
(5) Heat insulation for joint Heat insulation for joints SKM, SRRM models Cover the joint with insulation material Vinyl tape for the indoor unit and tape it. STM model After checking each flare joint of the Band(accessory) indoor unit for gas leaks, cover it with the attached insulating material and firmly secure with the attached bands at both ends. Do not twist or flatten pipes. Care must be taken so as to prevent debris, chips and water from entering the piping during installation work.
Beware of wrong connections in refrigerant piping and wiring ● ● Make sure to match the piping and wiring from each unit to the outdoor unit. Be careful because if connections are wrong, normal operation cannot be achieved and may damage the compressor. [Correct connections] [Example of wrong connections] Piping Wiring Indoor unit Indoor unit D unit D unit D C Outdoor unit B A C unit B unit C unit B unit A unit D C Outdoor unit B A A unit 5.
(2) Installation of wired remote control (Optional parts) (a) Selection of installation location Avoid the following locations 1) Direct sunlight. 2) Close to heating device. 3) Highly humid or water splashing area. 4) Uneven surface. (b) Installation procedure 1) Exposed fiting a) Open the remote control case. 2) Recessed fitting a) The Electrical box and remote control (shield wire must be use in case of extension) are first embedded.
(3) Setting functions using the wired remote control (a) The default settings of this unit's functions are as follows: If you want to charge a setting, follow the procedure found in the installation manual and set to your desired setting. For the method of setting, please refer to the installation manual of a remote control unit.
(b) Function setting method 1) Stop the air conditioner 2) Press the SET and MODE buttons simultaneously for 3 seconds or longer. The screen display will be switched as follows: “ SELECT ITEM” “ AUTO RUN SET SET" “FUNCTION SET ” FUNCTION SET 3) Press the SET button. The unit will enter the function setting mode.
When “I/U FUNCTION ” is selected. 1 The screen display will be switched as follows: “ SET” I/U SELECT” “ “I/U No.00” (blinking) I/U No.00 or button. 2 Press either Select the indoor unit number that you want to change settings. If only one indoor unit is connected, the indoor unit number will not charge, so please proceed to Step 3. If “ALL I/U ” is selected while indoor group control is in effect, you can set all units to the same settings. 3 Press the SET button.
(d) Changing the remote control’s temperature setting range 1) The temperature setting range of the remote control can be changed. Through remote control button operations, the upper limit and lower limit set temperature values can be changed individually. During heating operation, the changed upper limit value becomes valid and at times other than during heating operation, (during cooling, dehumidification, auto and fan operation), the changed lower limit value becomes valid.
(4) SUPER LINK ADAPTER (SC-AD-E) (a) Functions 1) 2) 3) 4) Transmits the settings from the Super link option to the indoor units. Returns the priority indoor unit data in response to a data request from the Super link option. Inspects the error status of connected indoor units and transmits the inspection codes to the Super link option. A maximum of 16 units can be controlled (if in the same operation mode).
5.8 Installation of optional parts (Ducted type) Table of optional parts 1 Bottom air inlet grille set RTS12 2 Rear inlet filter set RBF12 3 Duct joint for air outlet plate RFJ22 4 Drain up kit RDU12E (1) Bottom air inlet grille set (a) Part No.: RTS12 (b) Parts list Name Qty.
Pan-head screw (2) Rear inlet filter set (a) Part No.: RBF12 Indoor unit Filter set Bracket for filter fixing Hanger metal (b) Installation Do not use this filter set alone. There are two inlet ports: lower inlet port (normal) and rear inlet port. 1) Detach the rear panel and the hanger metal screwad onto the rear Tappping screw panel from an indoor unit. 2) Attach the removed hanger metal to the frame of the filter set with small panhead screws.
Air flow and external static pressure characteristics (Heating: Hi) SRRM25ZE-S SRRM35ZE-S # $ $ ! " " ! ! ! " " " " " " # $ $ # $ $ # $ $ ◆ % & ' $ ($ SRRM60ZE-S " " # $ $ " " ! # $ $ # $ $ # $ $ ! " " " "
(4) 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 4 Tapping screw (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.
6 MAINTENANCE DATA 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 Outdoor unit Wired remote indicator indicator control display RUN TIMER (optional parts) (LED 5) light light Description of trouble Cause Conditions of flashing 1 time flash Comes on Stays off E6 Indoor heat exchanger sensor (1) error • Broken heat exchanger sensor (1) wire • Connector poor connection • Disconnected sensor When heat exchanger sensor (1) temperature of –20°C or under continued for more than 15 seconds while operation is stopped.
Inspection procedures corresponding to detail of trouble [Broken sensor wire, connector poor connection] Sensor error Is connector connection good? NO Correct connection. YES NO Is sensor resistance value good? Replace sensor. YES Replace PCB. ◆ Sensor temperature characteristics (Room temp., indoor unit heat exchanger temp., outdoor unit heat exchanger temp., outdoor air temp.
[Open phase on compressor output terminal, compressor lock] Current cut Does current cut operate when operating inverter with compressor wire disconnected? NO Defective inverter YES Is output voltage applied to all 3 phases of power transistor? NO Defective inverter YES NO Secure space for suction and blow out. Is there any shortcircuit? YES ● Check compressor wiring visually. Inspect compressor. If check results are normal, compressor is locked. ● Check insulation resistance.
[Gas shortage, defective discharge pipe sensor] Over heat of compressor Is discharge pipe sensor resistance value good? NO (page 96) Connector connection check, resistance value check, replacement of discharge pipe sensor YES Is sufficient quantity of refrigerant circulated? NO Does trouble persist after charging gas? NO Check if there are any places where gas is leaking. YES YES Clogged capillary tube or strainer, defective EEV, etc.
[Defective fan motor, connector poor connection, defective PCB] Outdoor fan motor error NO Is connector connection good? Correct connector connection YES Is the output of the outdoor unit’s printed circuit board normal? NO Is DC fan motor resistance value good? * Disconnect the fan motor connector, then investigate the DC fan motor and outdoor unit circuit board separately.
(b) Outdoor unit Phenomenon Sensor Operation mode Heat exchanger sensor Cooling System can be operated normally. System can be operated normally. Heating Defrosting is not performed. Defrosting is performed for 10 minutes at approx. 45 minutes. Outdoor air temperature sensor Cooling System can be operated normally. System can be operated normally. Heating Defrosting is not operated. Defrosting is performed for 10 minutes at approx. 45 minutes.
(6) How to make sure of remote control (1) Is remote control normal? NO Remote control defects Note (1) Check method of remote control YES (a) Press the reset switch of the remote control. (b) If all LCD are displayed after zero (1) display, it is ba- Again pushing operating switch sically normal. HI POWER YES Operating the unit? AUTO HI MED LO Abnormality is not found. ECONO AM ON NO Does unit ON/OFF button operates? YES Operating the unit. NO Replace the display.
(7) Inverter failure diagnosis If the results of the diagnosis in Item (3) indicate that the inverter is defective, perform the following inspection on the inverter.
CAUTION – HIGH VOLTAGE 103 - T3 T2 1 2 3 1 2 3 EARTH N L Y/G Y/G BK WH BR BK WH RD Y/G WH G2 CNP CNO G3 N-1 FMo CNT LED E ERROR AC.N AC.L Check fuse. There should be conductivity. FUSE 250V 15A BK L-1 BK ● Display lamp inspection • LED 5 (Abnormality display lamp - Red) ON or flashing: Protection function operating • LED 3 to 4: (Light display for each room - ON when there is a serial signal being reGreen) ceived among each of the indoor units.
CAUTION – HIGH VOLTAGE 104 - Y/G Y/G BK WH BL BK WH BR BK WH RD Y/G WH G2 CNR CNP CNO G3 N-1 L-1 FMo CNT LED E ERROR AC.N AC.L Check fuse. There should be conductivity. FUSE 250V 15A BK BK ● Display lamp inspection • LED 5 (Abnormality display lamp - Red) ON or flashing: Protection function operating • LED 2 to 4: (Light display for each room - ON when there is a serial signal being reGreen) ceived among each of the indoor units.
CAUTION – HIGH VOLTAGE 105 - Y/G Y/G BK WH BL BK WH BR BK WH RD Y/G WH G2 CNR CNP CNO G3 N-1 L-1 FMo CNT LED E ERROR AC.N AC.L Check fuse. There should be conductivity. FUSE 250V 20A BK BK ● Display lamp inspection • LED 5 (Abnormality display lamp - Red) ON or flashing: Protection function operating • LED 2 to 4: (Light display for each room - ON when there is a serial signal being reGreen) ceived among each of the indoor units.
CAUTION – HIGH VOLTAGE 106 - T5 T4 T3 T2 T1 1 2 3 EARTH 1 2 3 EARTH 1 2 3 EARTH 1 2 3 EARTH Y/G Y/G BK WH YL Y/G BK WH BL Y/G BK WH BR BK WH RD L N WH EARTH Y/G Y/G FUSE 250V 20A BK BK ● Display lamp inspection • LED 5 (Abnormality display lamp - Red) ON or flashing: Protection function operating • LED 1 to 4: (Light display for each room - ON when there is a serial signal being reGreen) ceived among each of the indoor units.
◆ Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] 1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.). If no problems are found, check the output of the power transistor. 2) Output inspection procedure (Example) Self-diagnosis display : Flashes 2 times Disconnect the terminals for the compressor.
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 R410A 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.
7 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITIONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) 7.1 Outline 7.1.
(3) Lubricating oils for R410A As the lubricating oils for R22, mineral oils, alkylbenze synthetic oils, etc. have so far been used. As R410A features less solubility with these conventional lubricating oils such as mineral oils, the lubricating oils tend to stay within the refrigeration cycle. As the lubricating oils highly soluble with R410A, ester, ethereal and other synthetic oils are available.
(2) Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used. Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 5~8 (see on page 112, 113) below. Also, union, half union, Tee-type union and elbow-type union shapes are generally used (see Fig 1).
d) Flare processing øD Make certain that a clamp bar and copper pipe have been cleaned. A By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. Be careful. When using a conventional flare tool, be sure to secure “dimension A” by using a gage for size adjustment. Fig.3 Flare processing dimensions Table 5.
Table 8. Flare and flare nut dimensions for R22 (2) [unit: mm] Dimension (mm) Nominal diameter Outer diameter (mm) Thickness (mm) 1/4 6.35 0.8 9.0 9.2 6.5 13 17 3/8 9.52 0.8 13.0 13.5 9.7 20 22 1/2 12.70 0.8 16.2 16.0 12.9 20 24 5/8 15.88 1.0 19.4 19.0 16.0 23 27 A B C D Flare nut width Flare connecting procedures and precautions a) Make sure that the flare and union portions do not have any scar or dust, etc.
(2) Identification a) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 110), and, as shown in Tables 5 and 6 (see on page 112), it also differs from R22 in flare processing and flare nut dimensions. So, it is necessary to choose a piping set suitable for R410A. b) Copper pipe with insulation Before using a copper pipe with insulation, make sure that it has a thickness designated for R410A.
(3) Flux a) Reasons for the use of flux • By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler. • In the brazing process, it prevents the metal surface from being oxidized. • By reducing the brazing filler’s surface tension, the brazing filler adheres better to the treated metal. b) Properties required for flux • Temperature at which flux is active coincides with the brazing temperature.
Reducing valve Nitrogen gas M Flow meter Stop valve From the nitrogen cylinder Piping Nitrogen gas Rubber plug for sealing Fig.5 Prevention of oxidation during brazing * Cautions during brazing 1 General cautions 1) The brazing strength should be high as required. 2) After operation, airtightness should be kept under a pressurized condition. 3) During brazing do not allow component materials to become damaged due to overheating.
(1) Tools exclusive for R410A a) Gauge manifold • As R410A is characterized by high pressure, conventional tools cannot be used. Table 11. Differences between conventional high/low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure gauge (red) -0.1~3.5MPa -76 cmHg~35 kgf/cm2 -0.1~5.3MPa -76 cmHg~53 kgf/cm2 Compound gauge (blue) -0.1~1.7MPa -76 cmHg~17 kgf/cm2 -0.1~3.
e) Flare tool (clutch type) • A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0~0.5 mm in flare processing, and also features higher spring strength for increased expansion pipe torque. This flare tool can also be used for R22 copper pipe. f) Gauge for projection adjustment (used when flare processing is made by using conventional flare tool [clutch type]) • A gauge 1.
7.3.2 New installation work (when using new refrigerant piping) (1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) a) Connect the charge hose to the outdoor unit. 1 b) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed position. 3 4 c) Place the handle Lo in the fully opened position 5, and turn on the vacuum pump’s power switch.
f) After charging liquid refrigerant into the air conditioner by closing the charging valve, stop operation by fully closing the gauge manifold’s valve Lo. 2 5 g) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. h) After securing the caps on the service port and control valve, check the caps’ periphery to see if there is any gas leakage.
7.3.6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. (For details, see the instruction manual prepared by the equipment manufacturer) 1) Connect the charge hose to the outdoor unit’s service port. 2) Connect the charge hose to the vacuum pump adapter. At this time, keep the control valves in the fully opened position.
(4) (5) Recovering procedures a) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. b) During the operation, take care of the following cautions. 1 Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency. 2 During the operation, remain at work site to ensure safety.
b) Charge hose (pressure resistant hose for fluorocarbon) and packing • It is 1/4B in thickness and available in various lengths, etc. • Use a hose whose pressure resisting performance is higher than 5.2 MPa (52 kg/cm2G). • Generally, a setting fixture is provided only on one end. (4) Gauge manifold Hose packing • The most important service tool for refrigeration and air conditioner. Setting fixture • Widely used when charging/recovering R410A while checking gas pressure.
MEMO
INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax: (03) 6716-5926