Mitsubishi Electric SL Series Technical & Service Manual Download Page 1

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TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS

CONTENTS

1. TECHNICAL CHANGE ·························2

2. PART NAMES AND FUNCTIONS ········2

3. SPECIFICATIONS ·································4

4. OUTLINES AND DIMENSIONS ··········34

5. WIRING DIAGRAM ·····························36

6. REFRIGERANT SYSTEM DIAGRAM·······39

7. DATA ···················································43

8. MICROPROCESSOR CONTROL ·······47

9. TROUBLESHOOTING ························56

10. 4-WAY AIR FLOW SYSTEM ··············63

11. DISASSEMBLY PROCEDURE···········65

12. PARTS LIST ·······································68

No. OC280

REVISED EDITION-B

INDOOR UNIT

REMOTE CONTROLLER

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

COOL

DRY

FAN

VANE

SELECT

TIME

Ceiling Cassettes

Series SLH/SL

Indoor unit
[Model names]

[Service Ref.]

SLH-1AR

SLH-1AR.TH
SLH-1AR

.TH

SLH-1.6AR

SLH-1.6AR.TH
SLH-1.6AR

.TH

SLH-2AR

SLH-2AR.TH
SLH-2AR

.TH

SL-1AR

SL-1AR.TH
SL-1AR.TH-T

SL-1.6AR

SL-1.6AR.TH
SL-1.6AR.TH-T

SL-2AR

SL-2AR.TH
SL-2AR.TH-T

SLH-1AR
SLH-1.6AR
SLH-2AR

SL-1AR
SL-1.6AR
SL-2AR

Revision:
•SLH-1AR

.TH, SLH-1.6AR

.TH and

SLH-2AR

.TH are added in REVISED

EDITION-B.

•Please void OC280 REVISED

EDITION-A.

•This manual does not cover the

following outdoor units. When
servicing them, please refer to the
service manual No.OC282 REVISED
EDITION-B and this manual in a set.

SUH-1VR.TH, SUH-1.6VR2.TH,
SUH-2VR

.TH, SUH-2VR

.TH,

SU-1VR.TH, SU-1.6VR2.TH,
SU-2VR

.TH, SU-1VR.TH-T,

SU-1.6VR2.TH-T, SU-2VR

.TH-T

[For SLH- • AR

.TH]

NOTE:
This service manual descrides only for
the indoor unit and the connected outdoor
unit of SUH series. In PUMY series, refer
to the service manual outdoor unit and
“R-CONVERTER UNIT” for PUMY series.

OC280-B-1.qxp 03.5.23 1:02 PM Page 1

Summary of Contents for SL Series

Page 1: ...H SLH 1AR1 TH SLH 1 6AR SLH 1 6AR TH SLH 1 6AR1 TH SLH 2AR SLH 2AR TH SLH 2AR1 TH SL 1AR SL 1AR TH SL 1AR TH T SL 1 6AR SL 1 6AR TH SL 1 6AR TH T SL 2AR SL 2AR TH SL 2AR TH T SLH 1AR SLH 1 6AR SLH 2AR SL 1AR SL 1 6AR SL 2AR Revision SLH 1AR1 TH SLH 1 6AR1 TH and SLH 2AR1 TH are added in REVISED EDITION B Please void OC280 REVISED EDITION A This manual does not cover the following outdoor units Whe...

Page 2: ...ng or dehumidifying Air Intake Inhales air from room Indoor Main Unit SLH 1AR TH SL 1AR TH SL 1AR TH T SLH 1 6AR TH SL 1 6AR TH SL 1 6AR TH T SLH 2AR TH SL 2AR TH SL 2AR TH T SLH 1AR1 TH SLH 1 6AR1 TH SLH 2AR1 TH SLH 1AR TH SLH 1AR1 TH SLH 1 6AR TH SLH 1 6AR1 TH SLH 2AR TH SLH 2AR1 TH 1 The indoor controller board changed in order to connect with R CONVERTER UNIT 2 Outdoor units of the PUMY series...

Page 3: ...auto cooling heating and drying operation modes SLH This button is used to set fan speed to low medium or high TIMER SELECT button Used for selecting timed starting or stopping FAN SPEED button ON OFF RESET TOO WARM TOO COOL MODE COOL DRY FAN FAN VANE SELECT TIME h SLH 1AR TH SLH 1AR1 TH SLH 1 6AR TH SLH 1 6AR1 TH SLH 2AR TH SLH 2AR1 TH SL 1AR TH SL 1AR TH T SL 1 6AR TH SL 1 6AR TH T SL 2AR TH SL ...

Page 4: ... at 20 Model Winding resistance at 20 SUH 1VR TH Single phase 220 240V 50Hz Cooling SUH 1 6VR2 TH SLH 1AR TH SLH 1AR1 TH SLH 1 6AR TH SLH 1 6AR1 TH 2 5 2 5 0 9 4 5 4 3 970 1010 98 98 4 10 3 88 2 58 2 48 Heating 3 0 3 1 4 7 4 5 1010 1050 98 97 4 30 4 08 2 97 2 95 33 36 47 580 620 710 760 3 4 3 7 0 8 MS56 O 0 30 RH 174VGHT 800 C R 3 30 C S 5 80 PK6V11 LA WHT BLK 308 BLK BLU 57 BLU YLW 35 YLW BRN 39 ...

Page 5: ... m W m kg L k k k Capacity Electrical data Coefficient of performance C O P Compressor Indoor fan motor Outdoor fan motor Dimensions Indoor unit Grille Indoor unit Grille Width Height Depth Width Height Depth Indoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Outdoor unit Air speed Coverage range RT11 at 25 RT12 at 25 RT61 at 0 Sound level Hi Fan speed Hi Fan speed regulator Outlet air ...

Page 6: ...esistance at 20 Model Winding resistance at 20 Model Winding resistance at 20 SU 1VR TH SU 1VR TH T Single phase 220 240V 50Hz Cooling SU 1 6VR2 TH SU 1 6VR2 TH T SL 1AR TH SL 1AR TH T SL 1 6AR TH SL 1 6AR TH T 2 6 2 6 1 0 600 4 6 4 4 990 1030 98 98 21 23 4 20 3 98 0 40 0 42 2 63 2 52 RH 174VGHT 800 C R 3 30 C S 5 80 PK6V11 LA RA6V23 FC WHT BLK 353 BLK RED 321 780 540 255 15 3 32 36 45 580 620 710...

Page 7: ...mance C O P Compressor Indoor fan motor Outdoor fan motor Dimensions Indoor unit Grille Indoor unit Grille Width Height Depth Width Height Depth Indoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Outdoor unit Air speed Coverage range RT11 at 25 RT12 at 25 RT61 at 0 Sound level Hi Fan speed Hi Fan speed regulator Outlet air speed and coverage range Outdoor unit Outdoor unit Refrigerant f...

Page 8: ...1 44 1 14 1 83 1 56 1 26 1 94 1 67 1 38 1 06 1 79 1 51 1 19 2 17 1 91 1 63 1 32 0 97 2 28 2 03 1 75 1 45 1 11 2 39 2 14 1 88 1 58 1 24 2 50 2 26 2 00 1 71 1 37 2 62 2 38 2 12 1 84 1 51 2 73 2 50 2 24 1 97 1 64 2 84 2 61 2 37 2 10 1 78 2 70 2 85 2 70 2 85 3 00 2 70 2 85 3 00 2 70 2 85 3 00 3 15 2 85 3 00 3 15 2 70 2 85 3 00 3 15 3 30 2 70 2 85 3 00 3 15 3 30 2 70 2 85 3 00 3 15 3 30 2 70 2 85 3 00 ...

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Page 19: ... 0 38 0 26 0 54 0 42 0 30 0 58 0 46 0 34 0 22 0 50 0 38 0 26 0 66 0 54 0 42 0 30 0 18 0 70 0 58 0 46 0 34 0 22 0 74 0 62 0 50 0 38 0 26 0 78 0 66 0 54 0 42 0 30 0 82 0 70 0 58 0 46 0 34 0 86 0 74 0 62 0 50 0 38 0 90 0 78 0 66 0 54 0 42 2402 2472 2402 2472 2587 2402 2472 2587 2402 2472 2587 2657 2472 2587 2657 2402 2472 2587 2657 2749 2402 2472 2587 2657 2749 2402 2472 2587 2657 2749 2402 2472 2587...

Page 20: ... 73 1 44 1 12 1 84 1 56 1 25 1 96 1 68 1 38 1 04 1 80 1 50 1 17 2 19 1 92 1 63 1 31 0 94 2 31 2 05 1 76 1 44 1 08 2 43 2 17 1 89 1 58 1 22 2 54 2 29 2 01 1 71 1 36 2 66 2 41 2 14 1 84 1 50 2 78 2 54 2 27 1 98 1 64 2 90 2 66 2 40 2 11 1 78 2 81 2 96 2 81 2 96 3 12 2 81 2 96 3 12 2 81 2 96 3 12 3 28 2 96 3 12 3 28 2 81 2 96 3 12 3 28 3 43 2 81 2 96 3 12 3 28 3 43 2 81 2 96 3 12 3 28 3 43 2 81 2 96 3...

Page 21: ...7 0 35 0 63 0 51 0 39 0 67 0 55 0 43 0 31 0 59 0 47 0 35 0 75 0 63 0 51 0 39 0 27 0 79 0 67 0 55 0 43 0 31 0 83 0 71 0 59 0 47 0 35 0 87 0 75 0 63 0 51 0 39 0 91 0 79 0 67 0 55 0 43 0 95 0 83 0 71 0 59 0 47 0 99 0 87 0 75 0 63 0 51 1030 1059 1030 1059 1109 1030 1059 1109 1030 1059 1109 1139 1059 1109 1139 1030 1059 1109 1139 1178 1030 1059 1109 1139 1178 1030 1059 1109 1139 1178 1030 1059 1109 113...

Page 22: ...12 1 84 1 56 1 25 1 96 1 68 1 38 1 04 1 80 1 50 1 17 2 19 1 92 1 63 1 31 0 94 2 31 2 05 1 76 1 44 1 08 2 43 2 17 1 89 1 58 1 22 2 54 2 29 2 01 1 71 1 36 2 66 2 41 2 14 1 84 1 50 2 78 2 54 2 27 1 98 1 64 2 90 2 66 2 40 2 11 1 78 2 81 2 96 2 81 2 96 3 12 2 81 2 96 3 12 2 81 2 96 3 12 3 28 2 96 3 12 3 28 2 81 2 96 3 12 3 28 3 43 2 81 2 96 3 12 3 28 3 43 2 81 2 96 3 12 3 28 3 43 2 81 2 96 3 12 3 28 3 ...

Page 23: ...9 0 47 0 35 0 63 0 51 0 39 0 67 0 55 0 43 0 31 0 59 0 47 0 35 0 75 0 63 0 51 0 39 0 27 0 79 0 67 0 55 0 43 0 31 0 83 0 71 0 59 0 47 0 35 0 87 0 75 0 63 0 51 0 39 0 91 0 79 0 67 0 55 0 43 0 95 0 83 0 71 0 59 0 47 0 99 0 87 0 75 0 63 0 51 1071 1102 1071 1102 1154 1071 1102 1154 1071 1102 1154 1185 1102 1154 1185 1071 1102 1154 1185 1226 1071 1102 1154 1185 1226 1071 1102 1154 1185 1226 1071 1102 115...

Page 24: ...1 83 2 48 2 02 1 53 2 66 2 21 1 72 2 84 2 40 1 92 1 39 2 59 2 12 1 60 3 20 2 77 2 31 1 81 1 23 3 38 2 96 2 51 2 01 1 45 3 56 3 15 2 71 2 22 1 66 3 74 3 34 2 90 2 43 1 88 3 92 3 53 3 10 2 63 2 09 4 10 3 71 3 30 2 84 2 30 4 28 3 90 3 49 3 04 2 52 4 32 4 56 4 32 4 56 4 80 4 32 4 56 4 80 4 32 4 56 4 80 5 04 4 56 4 80 5 04 4 32 4 56 4 80 5 04 5 28 4 32 4 56 4 80 5 04 5 28 4 32 4 56 4 80 5 04 5 28 4 32 ...

Page 25: ... 0 43 0 31 0 59 0 47 0 35 0 63 0 51 0 39 0 27 0 55 0 43 0 31 0 71 0 59 0 47 0 35 0 23 0 75 0 63 0 51 0 39 0 27 0 79 0 67 0 55 0 43 0 31 0 83 0 71 0 59 0 47 0 35 0 87 0 75 0 63 0 51 0 39 0 91 0 79 0 67 0 55 0 43 0 95 0 83 0 71 0 59 0 47 1706 1755 1706 1755 1837 1706 1755 1837 1706 1755 1837 1886 1755 1837 1886 1706 1755 1837 1886 1952 1706 1755 1837 1886 1952 1706 1755 1837 1886 1952 1706 1755 1837...

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Page 27: ... 0 43 0 31 0 59 0 47 0 35 0 63 0 51 0 39 0 27 0 55 0 43 0 31 0 71 0 59 0 47 0 35 0 23 0 75 0 63 0 51 0 39 0 27 0 79 0 67 0 55 0 43 0 31 0 83 0 71 0 59 0 47 0 35 0 87 0 75 0 63 0 51 0 39 0 91 0 79 0 67 0 55 0 43 0 95 0 83 0 71 0 59 0 47 1810 1862 1810 1862 1949 1810 1862 1949 1810 1862 1949 2001 1862 1949 2001 1810 1862 1949 2001 2071 1810 1862 1949 2001 2071 1810 1862 1949 2001 2071 1810 1862 1949...

Page 28: ... 2 04 2 87 2 28 1 63 3 10 2 52 1 88 3 33 2 76 2 13 1 45 3 00 2 38 1 71 3 79 3 24 2 63 1 97 1 23 4 02 3 48 2 89 2 24 1 50 4 25 3 72 3 14 2 50 1 78 4 48 3 96 3 39 2 76 2 05 4 70 4 19 3 64 3 03 2 32 4 93 4 43 3 89 3 29 2 60 5 16 4 67 4 14 3 55 2 87 5 51 5 81 5 51 5 81 6 12 5 51 5 81 6 12 5 51 5 81 6 12 6 43 5 81 6 12 6 43 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51...

Page 29: ...0 0 38 0 26 0 54 0 42 0 30 0 58 0 46 0 34 0 22 0 50 0 38 0 26 0 66 0 54 0 42 0 30 0 18 0 70 0 58 0 46 0 34 0 22 0 74 0 62 0 50 0 38 0 26 0 78 0 66 0 54 0 42 0 30 0 82 0 70 0 58 0 46 0 34 0 86 0 74 0 62 0 50 0 38 0 90 0 78 0 66 0 54 0 42 2392 2461 2392 2461 2576 2392 2461 2576 2392 2461 2576 2645 2461 2576 2645 2392 2461 2576 2645 2737 2392 2461 2576 2645 2737 2392 2461 2576 2645 2737 2392 2461 257...

Page 30: ... 2 08 2 93 2 32 1 66 3 16 2 57 1 92 3 39 2 81 2 17 1 48 3 06 2 43 1 74 3 86 3 30 2 69 2 01 1 25 4 10 3 54 2 94 2 28 1 53 4 33 3 79 3 20 2 55 1 81 4 56 4 03 3 45 2 82 2 09 4 80 4 28 3 71 3 09 2 37 5 03 4 52 3 97 3 35 2 65 5 27 4 77 4 22 3 62 2 93 5 62 5 93 5 62 5 93 6 24 5 62 5 93 6 24 5 62 5 93 6 24 6 55 5 93 6 24 6 55 5 62 5 93 6 24 6 55 6 86 5 62 5 93 6 24 6 55 6 86 5 62 5 93 6 24 6 55 6 86 5 62...

Page 31: ...0 0 38 0 26 0 54 0 42 0 30 0 58 0 46 0 34 0 22 0 50 0 38 0 26 0 66 0 54 0 42 0 30 0 18 0 70 0 58 0 46 0 34 0 22 0 74 0 62 0 50 0 38 0 26 0 78 0 66 0 54 0 42 0 30 0 82 0 70 0 58 0 46 0 34 0 86 0 74 0 62 0 50 0 38 0 90 0 78 0 66 0 54 0 42 2454 2525 2454 2525 2643 2454 2525 2643 2454 2525 2643 2714 2525 2643 2714 2454 2525 2643 2714 2808 2454 2525 2643 2714 2808 2454 2525 2643 2714 2808 2454 2525 264...

Page 32: ... 59 6 32 2267 2333 2442 7 56 7 26 7 02 2311 2420 2507 SLH 2AR CAPACITY 5 4 kW INPUT 2180 W OUTDOOR W B INDOOR 10 D B Q INPUT 5 Q INPUT 0 Q INPUT 5 Q INPUT 10 Q INPUT 15 Q INPUT 20 Q INPUT 15 21 26 1 95 1 86 1 67 683 735 788 2 36 2 23 2 08 819 872 924 2 76 2 64 2 45 924 966 1019 3 16 3 01 2 85 998 1040 1092 3 57 3 41 3 26 1061 1092 1145 3 94 3 78 3 63 1092 1124 1176 4 34 4 17 4 03 1113 1166 1208 HE...

Page 33: ...Me 36 SPL dB 34 LINE 50Hz NOTCH Lo 31 NOISE CRITERION CURVES UNIT 1 5m MICROPHONE CEILING Ambient temperature 27 Test conditions are based on JIS Z8731 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 002 MICRO BAR BAND CENTER FREQUENCIES Hz SLH 2AR TH SLH...

Page 34: ...r edge 230 182 48 Wiring entry Terminal block Ceiling surface 235 208 27 5 0 193 20 93 38 58 66 121 17 202 56 57 72 31 Ceiling hole Suspension bolt pitch 15 37 15 37 576 620 420 570 335 199 352 335 Suspension bolt pitch Ceiling hole 2 1 SLH 2AR SL 2AR Refrigerant pipe flared connection 5 8F 15 88mm dia 6 35mm dia Refrigerant pipe 1 4F flared connection Models SLH 1AR SL 1AR SLH 1 6AR SL 1 6AR Refr...

Page 35: ...to the desired location using two tapping screws 2 Place the lower end of the controller into the holder A Wireless remote controller Accessory B Wall C Remote controller holder Accessory D Fixing screw Accessory The signal can travel up to approximately 7 meters in a straight line within 45 degrees to both right and left of the center line of the receiver In addition the signal may not be receive...

Page 36: ... lever sleeve NOTES 1 About the outdoor side electric wiring refer to the outdoor unit electlic wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector 9 BUZZER ZNR1 VARISTOR SYMBOL SYMBOL SYMBOL NAME NAME NAME X1 X2 X5 RELAY D PUMP D HEATER RELAY FAN MOTOR COMPRESSOR CONTACTOR 52C BZ LED1 LED2 SW1 SW2 I B INDOOR CONTROLLER BOARD...

Page 37: ...nism so they cannot be removed when you pull the lead wire Be sure to pull the wire by pushing the locking lever projected part of the terminal with a finger locking lever 1Slide the sleeve 2Pull the wire while pushing the locking lever sleeve NOTES 9 BUZZER ZNR1 VARISTOR NAME SYMBOL SYMBOL NAME SYMBOL NAME X1 X2 X5 RELAY D PUMP D HEATER RELAY FAN MOTOR COMPRESSOR CONTACTOR 52C BZ LED1 LED2 SW1 SW...

Page 38: ... RT11 ROOM TEMP THERMISTOR VANE MOTOR MV FAN MOTOR MF DEW PREVENTION HEATER H2 DRAIN SENSOR DRAIN UP MACHINE DP DS FUSE FUSE 3 15A How to remove the terminals shown at w mark w shows the terminals with a lock mechanism so they cannot be removed when you pull the lead wire Be sure to pull the wire by pushing the locking lever projected part of the terminal with a finger locking lever 1Slide the sle...

Page 39: ...t 100 Strainer Capillary tube 4 0X 2 4XL660 2VR1 3 0X 2 0XL250 2VR2 Capillary tube 3 0X 1 6XL860 X2 Restrictor valve Refrigerant flow in cooling Compressor Accumulator Strainer 1 100 valve Muffler Refrigerant flow in heating Refrigerant pipe 15 88 Option with heat insulator Refrigerant pipe Option 6 35 with heat insulator Dis Pressure Regulator Strainer 50 Strainer 50 Reversing SLH 2AR TH SLH 2AR1...

Page 40: ...onnection Stop valve Stop valve with service port 100 Strainer Strainer 50 Strainer 50 Capillary tube 3 0x 2 0xL570 Compressor Accumulator Refrigerant pipe 15 88 Option with heat insulator Refrigerant pipe Option 6 35 with heat insulator Refrigerant flow INDOOR UNIT SL 2AR TH SL 2AR TH T OUTDOOR UNIT SU 2VR1 TH SU 2VR1 TH T Indoor heat exchanger Outdoor heat exchanger Distributor With strainer Fla...

Page 41: ...tter which unit is higher Indoor unit SLH 1AR TH SLH 1AR1 TH SLH 1 6AR TH SLH 1 6AR1 TH SLH 2AR TH SLH 2AR1 TH SL 1AR TH SL 1AR TH T SL 1 6AR TH SL 1 6AR TH T SL 2AR TH SL 2AR TH T SUH 1VR TH SUH 1 6VR2 TH SUH 2VR1 TH SUH 2VR2 TH SU 1VR TH SU 1VR TH T SU 1 6VR2 TH SU 1 6VR2 TH T SU 2VR1 TH SU 2VR1 TH T 800 1 400 1 800 800 900 1 600 0 0 0 25 50 15 50 100 30 75 150 45 100 200 60 125 250 75 150 300 9...

Page 42: ...wo minutes Make sure the pointer of the gauge manifold valve remains in the same position Confirm that the pressure gauge show 0 1 MPa 76 cmHg After refrigerant pipes are connected and evacuated fully open all stop valves on gas and liquid pipe sides Operating without fully opening lowers the performance and causes trouble Pipe length 7m maximum No gas charge is needed Pipe length exceeding 7m Cha...

Page 43: ...in the figure and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet The thermometers must be attached to the position where air speed is high 2 Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air inlet Cover the thermometers to prevent direct rays of the sun 3 Check that the air filter is cleaned 4 Open windows and doors of the room 5 Press the TEST R...

Page 44: ...SUH 1VR TH 3 The unit of pressure has been changed to MPa based on the international system of units SI unit system The converted score against the traditional unit system can be gotten according to the formula below 1 MPa 10 2 kgf f f 0 7 0 6 0 5 0 4 0 3 0 2 15 18 20 25 30 32 35 50 60 70 Ambient temperature Ambient humidity 10 9 8 7 6 5 15 18 20 25 30 32 35 50 60 70 Ambient temperature Ambient hu...

Page 45: ...r unit current A 220v 240v SL 1 6AR TH SU 1 6VR2 TH SL 1 6AR TH T SU 1 6VR2 TH T 0 7 0 6 0 5 0 4 0 3 0 2 Outdoor low pressure 7 6 4 5 3 2 MPa kgf F 220V 15 18 20 25 30 32 35 50 60 70 Ambient temperature Ambient humidity 13 12 11 10 9 8 7 15 18 20 25 30 32 35 50 60 70 Ambient temperature Ambient humidity Outdoor unit current A 240v SL 2AR TH SU 2VR1 TH SL 2AR TH T SU 2VR1 TH T SLH 2AR TH SLH 2AR1 T...

Page 46: ...SLH 1 6AR1 TH SUH 1 6VR2 TH SLH 2AR TH SLH 2AR1 TH SUH 2VR1 TH SUH 2VR2 TH 8 7 6 5 4 3 0 2 5 10 15 20 25 Ambient temperature Outdoor unit current A HEAT operation Condition Indoor Dry bulb temerature 20 0 Wet bulb temerature 14 5 Outdoor Dry bulb temerature 7 15 20 Wet bulb temerature 6 12 14 5 240V 220V SLH 1AR TH SLH 1AR1 TH SUH 1VR TH OC280 B 2 qxp 03 5 23 2 55 PM Page 46 ...

Page 47: ...usly operating b Indoor fan speed is LOW MED c Room temperature is below 26 C When compressor stops the accumulated time is cancelled and when compressor restarts time counting starts from the beginning Time counting also stops temporarily when the indoor fan speed becomes HIGH or the room temperature exceeds 26 C However when two of the above conditions b And c are satisfied again time accumulati...

Page 48: ...on 1 Horizontal airflow 30 4 Downward airflow 70 2 Downward airflow 45 5 Swing 3 Downward airflow 55 b SWING mode i The vane motor turns ON when the SWING mode is selected The vane motor is continuously ON during SWING mode VANE POSITION 1 Fan speed LOW MED 2 Fan speed HIGH 1 2 3 4 30 55 70 AUTO RETURN If you select 2 or 3 or 4 when the fan speed is LOW or MED the airconditioner will switch automa...

Page 49: ...nd time control 1 Set temperature is controlled to fall 2 C above from initial set temperature 2 When the thermostat is ON the compressor repeats 8 minutes ON and 3 minutes OFF When the thermostat is OFF the compressor repeats 4 minutes OFF and 1 minute ON Indoor fan and outdoor fan operate in the same cycle as the compressor When the room temperature is under 23 C When the thermostat is ON the co...

Page 50: ...on 1 Horizontal airflow 30 4 Downward airflow 70 2 Downward airflow 45 5 Swing 3 Downward airflow 55 b SWING mode i The vane motor turns ON when the SWING mode is selected The vane motor is continuously ON during SWING mode VANE POSITION 1 Fan speed LOW MED 2 Fan speed HIGH 1 2 3 4 30 55 70 AUTO RETURN 45 30 55 70 45 1 2 3 4 5 If you select 2 or 3 or 4 when the fan speed is LOW or MED the aircondi...

Page 51: ...ation starts by POWER b ut ton ON Operation stops by POWER but ton OFF Room temperature becomes equal to set temperature Room temperature falls below set tem perature W 1 W 1 w1 In case of coil temperature thermistor detect 22 C or above Lo notch 16 C 22 C VLo notch 15 C or below FAN STOP w2 Even if the room temperature falls below the set temperature during this period the compressor will not sta...

Page 52: ...ow soft control 3 Flow soft control After the thermostat turns off the indoor fan operates at VLo NOTE When the thermostat turns on the fan operates at the set speed Due to the cold air prevention control the fan does not start until the indoor coil thermistor RT12 reads 22 C or more 4 Follow the item 6 during defrosting 3 Auto vane control Auto vane position is set to 70 degrees airflow at the st...

Page 53: ...ating conditions When the condition d or e is satisfied the defrosting operation stops d The defrost thermistor RT61 reads 3 1 C or more e The defrosting time exceeds 10 minutes NOTE w When the indoor coil thermistor reads above 18 C indoor fan operates at VLo for 30 seconds w When the indoor coil thermistor reads 18 C or less the indoor fan stops Defrosting time chart Defrost thermistor 3 1 or mo...

Page 54: ...CT TIME h 1 2 TIME SELECT SELECT 5 AUTO MODE operation Only SLH 1 1 6 2AR ON OFF RESET TOO WARM TOO COOL MODE AUTO COOL DRY HEAT FAN VANE SELECT TIME How to operate 1 Press POWER ON OFF button 2 Press MODE SELECT button to set operation mode to AUTO 3 Press SET TEMPERATURE button to set the desired temperature NOTE The set temperature changes 1 C when the or button is press one time AUTO MODE 19 t...

Page 55: ...g this time After 30 minutes the unit will start the emergency operation at a fixed temperature setting of 24 C in cooling mode or heating mode Procedure 1 Press the button Emergency operation switch cooling to start the cooling operation If the Operation lamp blinks every 0 5 seconds inspect the indoor outdoor connecting wire for mis wiring Check that the vanes operate properly when cool air is b...

Page 56: ... of the outdoor deicer P C board Check the wiring out between the indoor and outdoor Check the deicer P C board out Trouble of the Indoor controller board Exchange the Indoor controller board Indoor coil thermistor Mis connecting of the Indoor coil thermistor Reinsert the connector CN21 Trouble of the Indoor coil thermistor Trouble of the Indoor controller board Exchange the Indoor controller boar...

Page 57: ...arts in the Indoor P C board Trouble of the Indoor P C board Check the Indoor P C board out Trouble of the remote controller Check the varistor ZNR1 and fuse FUSE out in the Indoor controller board Exchange the remote controller Wiring between the indoor and outdoor is coming off Working the Indoor units and not working the outdoor units Check the wiring out between the indoor and outdoor Differen...

Page 58: ...re thermistor Indoor controller board is defective Check the room temperature thermistor Check the indoor coil thermistor Turn off the power supply and turn it on again to operate the unit in cooling mode Is the connector CN20 on the indoor controller board connected Connection is defective Connection is defective Connection is defective Is the connector CN21 on the indoor controller board connect...

Page 59: ...e remote controller is not operated near the signal receiving section on the unit Replace the batteries No Replace the remote controller Does the display appear on the screen Does the indoor unit receive the remote control signal when the remote controller is not operated near the signal receiving section on the unit Indoor fan motor does not rotate Measure the resistance of connectors FAN1 and 2 ...

Page 60: ...40 50 Thermistor for lower temperature Temperature Resistance K 3 Test point of indoor controller board Indoor electronic control board Fuse 250V AC 3 15A Room temperature thermistor RT11 Indoor coil thermistor RT12 Power supply input 220 240V AC Drain sensor DS OC280 B 2 qxp 03 5 23 2 56 PM Page 60 ...

Page 61: ...0 282 1 6AR 309 399 107 115 47 51 44 48 299 323 2AR 305 329 85 92 50 54 43 47 289 313 4 3kΩ 9 6kΩ Abnormal Abnormal Opened or short circuited Opened or short circuited Measure the resistance between the terminals using a tester Surrounding temperature 20 30 Measure the resistance between the terminals using a tester Surrounding temperature 20 30 Measure the resistance between the terminals using a...

Page 62: ... Fixed number of B 3480k 2 Rt 15exp 3480 0 15k 10 9 6k 20 6 3k 25 5 2k 30 4 3k 40 3 0k Thermistor R0 6 0k 5 Fixed number of B 3390k 2 Rt 15exp 3390 0 6 0k 10 3 9k 20 2 6k 25 2 2k 30 1 8k 40 1 3k Thermistor for lower temperature 1 273 t 1 273 1 273 t 1 273 20 0 20 40 60 80 Thermistor for drain sensor Temperature 0 1 2 3 4 5 6 7 8 9 10 Resistance K Thermistor for drain sensor OC280 B 3 qxp 03 5 23 1...

Page 63: ...or air flow amount Q Pa E Static pressure of indoor unit with air flow amount Q Qa Estimated amount of fresh air intake with out D m3 min m3 min Pa Pa Pa Pa How to read curves Whenever the indoor unit is operating the duct fun operates 1 Connect the optional multiple remote controller adapter PAC SA88HA E to the connector CN51 on the indoor controller board 2 Drive the relay after connecting the 1...

Page 64: ...ape Vane motor Horizontal vane Connector Unlocking button Vane motor 3 Set a vertical vane of the air outlet which tries to fixed by the hand slowly within the range in the table below Measured standard position of the grille Horizontal vane Standard of horizontal position Dimension A mm 21 25 28 30 Level 30 Min Downward 45 Downward 55 Downward 70 Max w Dimension between 21 mm and 30 mm can be arb...

Page 65: ...ng the panel 1 Remove the air intake grille See figure 1 Corner panel See figure 2 1 Remove the screw of the corner 2 Slide the corner panel to the direction of the arrow3 and remove the corner panel Panel See photo 2 1 Disconnect the connector that connects with the unit 2 Remove the 2 screws from the panel and loose another 2 screws which fixed to the oval hole have different diameter 3 Rotate t...

Page 66: ...oto 9 7 Remove the 6 screws fixed to the flat plate and remove the flat plate 8 Disconnect the lead wires to the direction of the fan motor and remove the 3 nuts of the fan motor Photo 5 6 Remove the drain pan 1 Remove the panel See photo 2 2 Remove the room temperature thermistor and the 2 lead wires held with fastener wireless controller board relay connector 9P red and panel relay connector 10P...

Page 67: ...d remove the heat exchanger 9 Removing the drain pump and drain sensor 1 Remove the panel See photo 2 2 Remove the drain pan See photo 4 3 Remove the 2 screws fixed to the control box cover and remove the control box cover 4 Remove the connectors of the CNP and the CN31 from the indoor controller board 5 Remove the 1 screw fixed to the cover and remove the cover 6 Disconnect the lead wires to the ...

Page 68: ...ET TOO WARM TOO COOL MODE AUTO COOL DRY HEAT FAN VANE SELECT TIME h ON OFF RESET TOO WARM TOO COOL MODE COOL DRY FAN FAN VANE SELECT TIME h SLH 1AR TH SLH 1 6AR TH SLH 2AR TH SLH 1AR1 TH SLH 1 6AR1 TH SLH 2AR1 TH SL 1AR TH SL 1 6AR TH SL 2AR TH SL 1AR TH T SL 1 6AR TH T SL 2AR TH T 1 2 3 4 5 6 8 9 10 11 13 7 15 18 20 21 16 12 3 22 21 23 24 19 17 14 OC280 B 3 qxp 03 5 23 1 06 PM Page 68 ...

Page 69: ...R INDOOR HEAT EXCHANGER MOTOR MOUNT INDOOR FAN MOTOR INDOOR FAN MOTOR INDOOR FAN MOTOR FLAT PLATE TURBO FAN SPL WASHER DRAIN PAN RO0M TEMPERATURE THERMISTOR FAN GUARD DRAIN PLUG COIL SUPPORT INDOOR COIL THERMISTOR DRAIN HOSE DRAIN SENSOR SENSOR HOLDER DRAIN PUMP LEG 2 COVER DRUM WIRELESS REMOTE CONTROLLER WIRELESS REMOTE CONTROLLER REMOTE CONTROLLER HOLDER 1 1 2 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2...

Page 70: ...77 E02 257 375 E07 107 447 E07 108 447 E07 109 447 E07 133 447 E07 134 447 E07 135 447 COMPRESSOR CONTACTOR FUSE VARISTOR TERMINAL BLOCK TERMINAL BLOCK INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD 1 1 1 1 1 1 52C FUSE ZNR1 2 TB TB I B I B I B I B I B I B 3P 4P 250V 3 15A 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Page 71: ...gram Symbol Recom mended Q ty Price 1 2 3 4 5 6 E02 138 340 E02 127 382 E02 661 385 E02 367 377 E02 229 375 E07 104 447 E07 105 447 E07 106 447 COMPRESSOR CONTACTOR FUSE VARISTOR TERMINAL BLOCK TERMINAL BLOCK INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD 52C FUSE ZNR1 2 TB TB I B I B I B 250V 3 15A 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Q ty set SL 1 6 1 2 AR TH AR TH T 3P 4...

Page 72: ...W B MV E07 103 003 E07 103 317 E07 103 037 E07 103 975 E07 103 100 E07 103 010 E07 103 303 E07 103 044 E07 103 031 E07 103 032 AIR OUTLET GRILLE WIRELSS REMOTE CONTROL BOARD AUTO VANE CORNER PANEL AIR FILTER INTAKE GRILLE VANE MOTOR VANE BUSH GEAR V GEAR M Parts name SLP 2AL SLP 2AL T Q ty set PANEL PARTS SLP 2AL SLP 2AL T 1 2 OC280 B 3 qxp 03 5 23 1 07 PM Page 72 ...

Page 73: ...OC280 B 3 qxp 03 5 23 1 07 PM Page 73 ...

Page 74: ...ECTRIC ENGINEERING CO LTD Distributed in May 2003 No OC280 REVISED EDITION B 24 Distributed in Jan 2003 No OC280 REVISED EDITION A PDF 141 Distributed in May 2002 No OC280 PDF 507 Made in Japan New publication effective May 2003 Specifications subject to change without notice OC280 B 3 qxp 03 5 23 1 07 PM Page 74 ...

Page 75: ...Related Links Model Number SL 1AR TH SL 1 2_Installation_Manual_ BG79S156H02 SL 1 2_Parts_Catalog_ OC280B SL 1 2_Service_manual_ OC280B ...

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Mitsubishi Electric SL Series, Technical & Service Manual

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