. WALL MOUNTED TYPE ROOM AIRCONDITIONER Split system, Air to air heat pump type ( ) SRK50HA SRK56HA SRK408HENF-L3 1
CONTENTS 1.1 GENERAL INFORMATION ........................................................................ 3 1.1.1 Specific features ................................................................................. 3 1.1.2 How to read the model name ............................................................. 3 1.2 SELECTION DATA ..................................................................................... 4 1.2.1 Specifications ..............................................................
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 equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor. (1) Remote control flap The flap can be automatically controlled by operating wireless remote control.
1.2 SELECTION DATA 1.2.1 Specifications Model SRK50A (Indoor unit) SRC50HA (Outdoor unit) Model SRK50A Item SRC50HA Cooling capacity W 4500 Heating capacity(1) Power source W 5700 1 Phase, 220/230/240V, 50Hz Cooling input Running current (Cooling) kW A 1.79 8.4/8.0/7.7 Heating input Running current (Heating) kW A 1.83 8.5/8.1/7.9 A 39/41/42 2.
Model SRK56A (Indoor unit) SRC56HA (Outdoor unit) Model SRK56A Item SRC56HA W W 5000 6200 Power source Cooling input kW 1 Phase, 220/230/240V, 50Hz 2.08 Running current (Cooling) Heating input A kW 9.7/9.3/8.9 2.10 Running current (Heating) Inrush current A A 9.8/9.4/9.0 44/46/48 Operation data(1) Cooling capacity(1) Heating capacity(1) COP (In cooling) Cooling Noise level Heating 2.
Model SRK408HENF-L3 (Indoor unit) SRC408HENF-L3 (Outdoor unit) Model Item SRK408HENF-L3 SRC408HENF-L3 Cooling capacity W 3500/3500 Heating capacity(1) Power source W 4100/4100 1 Phase, 220/240V, 50Hz Cooling input Running current (Cooling) kW A 1.320/1.405 6.4/6.4 Heating input Running current (Heating) kW A 1.335/1.460 6.5/6.5 A 33.6/36.6 2.65/2.
1.2.2 Range of usage & limitations Models Item Indoor return air temperature (Upper, lower limits) All models Refer to the selection chart Outdoor air temperature (Upper, lower limits) Refrigerant line (one way) length Vertical height difference between outdoor unit and indoor unit Power source voltage Voltage at starting Max. 15m Max. 5m (Outdoor unit is higher) Max. 5m (Outdoor unit is lower) Rating ± 10% Min. 85% of rating Frequency of ON-OFF cycle Max. 10 times/h ON and OFF interval Max.
Model SRK408HENF-L3 A Unit: mm 790 174 3 Room temp. sensor 56 275 Piping hole right (left) 9 Terminal block 760 450 170 187.5 260 61 117 46 170 49 15 9 15 16 60 36 6 Remote controller 51 780 Piping for Gas (Ø12.7) 390 67 62 18 Piping for Liquid (Ø6.35) 440 37 Drain hose 600 (Ø16) Piping hole (Ø65) Piping hole (Ø65) VIEW A (2) Outdoor unit Models SRC50HA, 56HA 50 328 14 49.6 314 290 43.5 12 12 Drain hole 286.4 476 203.1 510 850 136.
Model SRC408HENF-L3 Unit: mm 55 Drain holes 44 65 93 255 272 58 MAX 80 22 14 50 23 14 265 795 542 539 Terminal block 16 x12 (Oval holes) for unit fixing 2 places 45˚ 50 45˚ 15 44 50 58 14 115 413 32 40 272 142.5 Drain holes 510 142.5 33 14 Service valve (Liquid) Flare fitting Ø6.35 (1/4˝) Service valve (Gas) Flare fitting Ø12.7 (1/2˝) 300 1.2.
Model SRK408HENF-L3 Indoor unit Cooling cycle Heating cycle Outdoor unit Service valve (Gas) High pressure switch (63H) (for fan motor control) Flare connecting Piping (Gas) Ø12.7 Heat exchanger Room temperature sensor Heat exchanger sensor Check joint 4way valve Discharge Compressor Accumulator Heat exchanger Suction Piping (Liquid) Ø6.
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 heating capacity in relation to temperatures Coefficient of cooling & Heating capacity in relation to temperature 1.3 1.2 Cooling 1.1 1.0 Heating 0.9 0.8 0.7 0.6 Outdoor air D.B. temperature °C D.B.
1.3 ELECTRICAL DATA 1.3.1 Electrical wiring Models SRK50HA, 56HA Indoor unit Outdoor unit RD 63H RD 23D 52C 52XA 20S RD OR 51C CM 52XA RD CF0 52XB Cc BL Back up sw BK RD WH WH Display CNE ZNR BL WH FM0 Wireless R-Amp 23 DH 52XB BK WH ) CNM LM TH2 BK ( 52X1 52X1 BK BK BK F 250V 3.
Model SRK408HENF-L3 Indoor unit Outdoor unit Y/GN Power source 1 Phase 220/240V 50Hz 3 4 BL BK RD BK 63H OR WH 52C BK 8 WH Display 3 23DH 2 51C BK RD 7 BK 52X5 CFo Wireless R-Amp WH CNE CND Printed circuit board 20S RD OR S 7 52X6 RD BK FMo ZNR BK 2 2 52X6 6 BL BK BK Th2 CFI CNM LM 52X4 Th1 CNG CNU 1 5 3 CNW FMI BR WH RD PC F 250V 3.
1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Remote controller S 50, 56 models HI POWER operation indicator Indicators during HI POWER operation. FAN SPEED indicator ECONOMY operation indicator Indicators the ¡ for the fan speed which has been set. Indicators during ECONOMY operation. Operation switch over indicator Indicators the ¡ for the operation which has been set. ON-TIMER • OFF-TIMER indicator AIR FLOW indicator Indicates selected flap mode.
S 40 model OPERATION MOOD Indicator Indicates selected operation with • lamp. (AUTO) · (Cool) · (Heat) · (Dry) TEMPERATURE Indicator AIR FLOW Indicator Indicates set temperature. Shows selected flap mode. (Does not indicate temperature when operation mode is on AUTO) TIMER Indicator CONT FAN SPEED Indicator AUTO HI MED LO Indicates set air flow rate with • lamp. FAN SPEED button OPERATION MOOD select button Each time the button is pushed, the • indicator is switched over in turn.
(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 S 50, 56 models During cooling and s dry operation t During heating s operation t Stops for approximately 5 seconds in the horizontal position. Thick line : Rapid movement Thin line : Slow movement Stops for approximately 5 seconds in this position.
(3) Back-up Switch When the remote controller batteries 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) 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.
(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 Lo operation of indoor fan is not performed). When the previous mode is in “FAN”, operation mode is to be set by the above mentioned chart. (d) Established temperature (operate by the established temperature button on remote controller).
(9) Fan control (a) Fan speed change Mode COOL Fan speed knob HEAT AUTO FAN See below LOW Speed 2[1] (Speed 2[1]) Speed 3[2] (Speed 3[2]) Speed 2[1] (Speed 2[1]) MED Speed 3[2] (Speed 3[2]) Speed 4[3] (Speed 4[3]) Speed 3[2] (Speed 3[2]) HIGH Speed 4[3] (Speed 4[4]) Speed 5[4] (Speed 5[5]) Speed 4[3] (Speed 4[3]) Notes (1) (2) Please refer to page 21 regarding dry operation.
2) Function a) The indoor fan motor is controlled in accordance with the temperature of the indoor heat exchanger to send warm air from the start. b) When the air flow increases at heating starting as shown below, the temperature of the indoor heat exchanger become lower since the intake air temperature is still low. By this the fan speed is decreased.
(11) DRY operation (a) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as shown below. ¡Operation block area D Block C Block B Block A Block –2 0 +3 Room temp. – Setting temp.(deg) (b) Start up operation C.D Block A.
(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 2. Resetting condition: When 52C is off, or when dew condensation prevention control has been operating continuously for (c) 30 minutes.
(15) Forced defrosting (Heat pump type only) To test forced defrosting in the operation test mode, the unit may be operated once in the forced defrost mode as shown below. ¡Temporarily turn off the power source and then perform the following operation using the remote controller within 20 seconds after the power is turned back on.
(c) Heating economy operation The indoor unit fan operates 2ºC lower than the set temperature at speed 3. (d) Blow economy operation The indoor fan is controlled as follows. 1st speed OFF Set temp +1 +2 (21) Self diagnosis function When something abnormal happens on the outdoor unit, indoor unit fan motor and each sensor (heat exchanger, room temperature,) it will be indicated by flashing lamps.
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 of an installation done in error resulting in death or serious injury are listed in the WARNING section.
1.5.1 Selection of location for installation Unit : mm (1) Indoor unit (a) Where there is no obstructions to the air flow and where the 65 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 space mentioned below can be secured) Right side Left side 100 50 15 (d) Where wiring and the piping work will be easy to conduct.
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 installation board in the horizontal direction is to be conducted with lour screws in a temporary tightened state. Standard hole Adjust so that board will be level by turning the board with the standard hole as the center.
(3) Preparation of indoor unit (a) Mounting of connecting wires Suction grille S 50, 56 models (i) Open the suction grille, then remove the lid. (ii) Remove the wiring clamp. Connecting wire (iii) Pass the connecting wire to terminal block from behind of indoor unit. (iv) Connect the connecting wire securely to the terminal block. 1 Wiring clamp Terminal block Screw Connect the connection wire securely to the terminal block.
[When the pipe is extended to left and taken out from the rear center] (Drain pipe relocation procedure) 1. Remove the drain pipe. 2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain pipe. ¡ Loosen the spring clamp to ¡ Remove by hand or use ¡ Securely insert the drain cap ¡ Loosen the spring clamp and remove. cutting pliers, etc. removed in the step 2. securely insert the drain pipe.
1.5.4 Refrigerant piping (1) Preparation Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them. Indoor unit side Outdoor unit side Remove Remove ¡ Remove the flared nuts. (on both liquid and gas sides) (2) Press Press (Do not turn) Dimension A Liquid side (φ6.35): 9-9.5 dia Gas side (φ12.7): 16.2-17 dia ¡ 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.
Additional refrigerant charge When refrigerant piping exceeds 7(40 : 7.5) m conduct additional refrigerant charge after refrigerant sweeping. S 50, 56 models 7m over 15m : Additional charge amount per meter = 20g/m S 40 model Max.
(220/230/240V) Model Item High pressure MPa(kgf/cm2) Low pressure MPa(kgf/cm2) Temp. difference between suction air and discharge air (˚C) Running current (A) SRK50HA Cooling SRK56HA – – Heating 1.86 ~ 2.06 (19~21) 1.86 ~ 2.06 (19~21) Cooling 0.39 ~ 0.49 (4 ~ 5) 0.34 ~0.44 (3.5 ~ 4.5) Heating – – Cooling 12 ~ 16 12 ~ 16 Heating 19 ~ 23 21 ~ 25 Cooling 8.4/8.0/7.7 9.7/9.3/8.9 Heating 8.5/8.1/7.9 9.8/9.4/9.
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 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) Connect of Defect TIMER lamp is lights continuously. RUN lamp is lights continuously. Place of defect RUN lamp is flashing. (1 Time flash.) Abnormality of heat exchanger thermistor. ¡ Disconnection of heat exchanger thermistor. RUN lamp is flashing. (2 Time flash.) Abnormality of room temperature thermistor. ¡ Disconnection of room temperature thermistor. RUN lamp is flashing. (6 Time flash.) Abnormality of indoor fan motor.
Anormality of thermistor Disconnection of thermistor and defective connection of connector Chart for thermistor temperature resistance characteristics Is connection to connector good? No Repair connector. (Disconnection) Is thermistor resistance value normal? No Resistance value Yes Replace thermistor. Yes (kΩ) Replace PCB. (Short circuit) Temperature (°C) (4) Trouble Diagnostic Procedures Unit malfunctions or does not stop. Indoor lamp of indoor unit does not illuminate. Remove receptacle.
(5) Trouble shooting chart for the room temperature thermistor (Th1), heat exchanger thermistor (Th2) and defrost thermostat (23DH) Unit Thermistor Function Operation Room temperature thermistor (1) (Th1) except for “continuous” thermal setting. Short circuit Cooling Indoor unit Heating Cooling will not operate ¡ FMI : continuous operation ¡ CM,FMo: stopped Heating will not operate (CM, FMo, FMI all stopped) Continuous heating operation. ¡ Cannot be turned ON/OFF by thermostat ¡ When FMI is on.
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 refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. ¡ Evacuation procedure (a) Check to ensure that there is no internal pressure in the unit.
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 controller.
S50,56 models Cut the jumper wire for the “REMOTE” section on the printed circuit board. Carefully position the jumper wire so that it does not come in contact with other parts.
MEMO 40
