Page 2 - CONTENTS; Precautions for wireless remote controller installation
2 CONTENTS 1.1 GENERAL INFORMATION ........................................................................ 3 1.1.1 Specific features ................................................................................. 3 1.1.2 How to read the model name ....................................................
Page 3 - GENERAL INFORMATION; SRK series; SR C 50 H A; Indoor Unit; SR K 50 A; Outdoor Unit
3 1.1 GENERAL INFORMATION 1.1.1 Specific features The “Mitsubishi Daiya” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipm...
Page 7 - Refer to the selection chart
7 1.2.2 Range of usage & limitations 1.2.3 Exterior dimensions (1) Indoor unit Models SRK50A, 56A Indoor return air temperature(Upper, lower limits) Refrigerant line (one way) length Max. 15m All models Refer to the selection chart Power source voltage Rating ± 10% Voltage at starting Min. 85% o...
Page 8 - VIEW A
8 (2) Outdoor unit Models SRC50HA, 56HA 42.7 Drain hole Elogated hole (2-12X16) Terminal block Service valve (Liquide) Ø 6.35 (1/4'') Service valve (Gas)Ø12.7 (1/2'') Groundterminal 314 14 12 850 203.1 510 136.9 476 286.4 12 50 290 49.6 43.5 328 100.3 15 640 124 34.6 20˚ 20˚ Model SRK408HENF-L3 A 79...
Page 9 - Models SRK50HA, 56HA; Indoor unit
9 1.2.4 Piping system Models SRK50HA, 56HA Heat exchanger Strainer Service valve (Liquid) Flare connecting Service valve (Gas) High pressure switch(63H) (for fan motor control) Roomtemperaturethermistor Piping (Gas) Ø12.7 Piping (Liquid) Ø6.35 Flare connecting Checkjoint 4way valve Suction Muffler C...
Page 11 - obtained in the following way.; Net capacity = Capacity shown on specification; Factor by air; Cooling
11 1.2.5 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 he...
Page 12 - Meaning of marks; ELECTRICAL DATA; Models
12 Notes (1) ; denotes magentized relay × : denotes demagnetized relay (2) Th 1 is room temperature thermistor. Th 2 (the heat exchanger thermistor) is the hot start, hot keep, and frost prevention thermistor. (for details, refer to pages 19, 20, 22) (3) Preset values : 23DH (defroster stop thermost...
Page 14 - CONT HI POWER ECONO; ON OFF TIMER; AUTO; OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER; Remote controller
14 CONT HI POWER ECONO ON OFF TIMER FAN SPEED ON/OFF MODE TEMP AIR FLOW TIMER CANCEL HI POWER ECONO ON OFF ACL AUTO HI MED LO 1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Remote controller Indoor unit indicator FAN SPEED indicator Indicators the ¡ for the fan speed which has been set. ON-TI...
Page 15 - CONT
15 CONT ON OFF TIMER FAN SPEED ON/OFF MODE TEMP AIR FLOW SET TIMER TIMER ACL AUTO HI MED LO TEMPERATURE Indicator Indicates set temperature. (Does not indicate temperature whenoperation mode is on AUTO) FAN SPEED Indicator Indicates set air flow rate with • lamp. OPERATION MOOD Indicator OPERATION M...
Page 16 - Flap moves in upward and downward directions continuously.; When not operating; Recommendable stopping angle of the flap
16 (2) Flap control Control the flap by AIRFLOW button on the wireless remote controller. (a) Natural flow (AUTO) The flap will be automatically set to the angle of air flow best to operation. (i) Starting time of operation (c) Swing flap Flap moves in upward and downward directions continuously. Ho...
Page 18 - Temperature adjustment setting may be set between 18 and 30 ̊C.
18 (c) When switching to automatic operation during “Heating” “Cooling” “Dry” or when restarting with in 30 minutes (40 : 1 hour) after stopping with automatic operation mode, the former operating mode is selected. (In this case, 20 seconds Looperation of indoor fan is not performed). When the previ...
Page 19 - HOT START
19 (b) Fan speed knob: AUTO The indoor fan is automatically controlled in accordance with the difference between the room temperature (detected by the room temperature thermistor) and the thermostat setting as shown below. Mode Heating Cooling Fan 18~30˚C Thermostat setting point Thermostat setting ...
Page 22 - Device operation during defrosting
22 (12) Dew condensation prevention control for cooling operation This prevents dew condensation, in the indoor unit, from occurring. (a) Operating condition: when 52C is kept ON for 30 min. after the unit starts operation. (b) Operation content: forces the indoor fan to change from Speed 1 to Speed...
Page 23 - ON
23 (17) Three-minute forced operation When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the operation mode. (After 3 minutes has passed the thermal operation is effective.) However, stopping the compressor via a stop signal or ...
Page 24 - The indoor heat exchanger temperature < 5oC for 5 minutes and more; Blow economy operation; The indoor fan is controlled as follows.; Set temp; than 20 minutes for heating.; Heating economy operation
24 (21) Self diagnosis function When something abnormal happens on the outdoor unit, indoor unit fan motor and each sensor (heat exchanger, room tempera- ture,) it will be indicated by flashing lamps. (a) Abnormality of outdoor unit: S 50, 56 models 1) Cooling operation When the indoor heat exchange...
Page 25 - and; CAUTION; WARNING
25 1.5 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 o...
Page 26 - Selection of location for installation
26 1.5.1 Selection of location for installation (1) Indoor unit (a) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. (c) A place where there will be enough space for servicing. (Where spa...
Page 27 - Installation of indoor unit
27 1.5.2 Installation of indoor unit (1) Installation if installation board (a) Fixing of installation board Lock for the inside wall structures (Intermediate support or pillar)and firmly install the unit after level surface has been checked. Adjustment of the installationboard in the horizontal dir...
Page 28 - Protective taping
28 Use cables for interconnection wiring to avoid loosening of the wires.CENELEC code for cables Required field cables. H05 RNR3G1.5 (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 3or5 N...
Page 29 - Hang the upper portion of the unit rear cover on the mounting board,; Installation of outdoor unit; Fix the leg sections of the unit on a firm base which will not play.; Connection of indoor and outdoor connecting wiring; fuse is burnt out, replace it with new one.
29 Declining slope [When the pipe is extended to left and taken out from the rear center] Note (1) I t i s d e s i g n e d t o c o l l e c t m o i s t u r e accumulated on the rear face in thedrain pan. Be sure not to accommodatethe power cable, etc. above the chute. ¡ When arranging the pipe throug...
Page 30 - Refrigerant piping; Specified torquing value:
30 Indoor unit side Outdoor unit side ¡ Remove the flared nuts.(on both liquid and gas sides) ¡ Remove the flared nuts.(on both liquid and gas sides) ¡ Install the removed flared nuts to the pipes to be connected,then flare the pipes. Dimension ALiquid side( φ 6.35): 9-9.5 dia Gas side( φ 12.7): 16....
Page 31 - Test run
31 Item Model SRK408HENF-L3 Cooling – High pressure MPa(kgf/cm 2 ) Heating 1.76 ~ 1.96 (18 ~ 20) Cooling 0.39 ~0.49 (4.0 ~ 5.0) Low pressure MPa(kgf/cm 2 ) Heating – Cooling 12 ~ 16 Heating 18 ~ 22 Cooling 6.4/6.4 Running current (A) Heating 6.5/6.5 (4) Insulation of connecting portion 1) Cover the ...
Page 33 - MAINTENANCE DATA; Trouble shooting
33 1.6 MAINTENANCE DATA 1.6.1 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 u...
Page 34 - Abnormality of indoor fan motor
34 (2) Indication of Self Diagnosis (Indoor unit) (3) Troubleshooting Abnormality of outdoor unit [Compressor malfunction of insufficient gas (refrigerant)] TIMER lampis lightscontinuously. RUN lamp is flashing.(1 Time flash.) RUN lamp is flashing.(2 Time flash.) RUN lamp is flashing.(6 Time flash.)...
Page 35 - Anormality of thermistor; Trouble Diagnostic Procedures
35 Is connection to connectorgood? Is thermistor resistancevalue normal? Replace PCB. Repair connector. Replace thermistor. No No Yes Yes Anormality of thermistor Disconnection of thermistor and defective connection of connector Chart for thermistor temperatureresistance characteristics (Disconnecti...
Page 36 - How to make sure of remote controller; Trouble shooting chart for the room temperature thermistor (Th; CONT HIPOWER ECONO
36 (6) How to make sure of remote controller Unit Thermistor Operation Function Short circuit Broken connection Cooling Heating Cooling Heating Cooling Heating Indoor unit Room temperaturethermistor (1) (Th 1 ) except for “continuous”thermal setting. Cooling will not operate ¡ FM I : continuous oper...
Page 37 - Servicing; Evacuation
37 Liquid side Gas side Check joint Service hose Charge hose Vacuumpump Refrigerantcylinder Gaugemanifold 1.6.2 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 refrig...
Page 38 - Power supply remote operation; Operation contents
38 1.6.3 Power supply remote operation When the remote part on indoor unit PCB is modified, the air conditioner is turned ON-OFF by power supply ON-OFF operation without using remote control switch. After the power supply remote operation, the operation contents can be modified by the remote control...
Page 40 - MEMO
