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Mitsubishi Daiya SRK50HA User Manual

Wall mounted type room air-conditioner, split system, air to air heat pump type
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1. WALL MOUNTED TYPE ROOM AIR-
CONDITIONER
(
Split system, Air to air
heat pump type
SRK50HA
SRK56HA
SRK408HENF-L3
)
1
1

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Summary of Contents for Mitsubishi Daiya SRK50HA

  • Page 1 1. WALL MOUNTED TYPE ROOM AIR- CONDITIONER Split system, Air to air heat pump type SRK50HA SRK56HA SRK408HENF-L3...

  • Page 2: Table Of Contents

    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 ..................4 1.2.2 Range of usage & limitations ............. 7 1.2.3 Exterior dimensions................7 1.2.4 Piping system ..................

  • Page 3: 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 opera- tion control switch and the outdoor unit is composed of condensing unit with compressor.

  • Page 4: Selection Data

    1.2 SELECTION DATA 1.2.1 Specifications Model SRK50A (Indoor unit) SRC50HA (Outdoor unit) Model SRK50A SRC50HA Item Cooling capacity 4500 Heating capacity 5700 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 1.79 Running current (Cooling) 8.4/8.0/7.7 Heating input 1.83 Running current (Heating) 8.5/8.1/7.9 Inrush current 39/41/42...
  • Page 5 Model SRK56A (Indoor unit) SRC56HA (Outdoor unit) Model SRK56A SRC56HA Item Cooling capacity 5000 Heating capacity 6200 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 2.08 Running current (Cooling) 9.7/9.3/8.9 Heating input 2.10 Running current (Heating) 9.8/9.4/9.0 Inrush current 44/46/48 COP (In cooling) 2.40 Sound level...
  • Page 6 Model SRK408HENF-L3 (Indoor unit) SRC408HENF-L3 (Outdoor unit) Model SRK408HENF-L3 SRC408HENF-L3 Item Cooling capacity 3500/3500 Heating capacity 4100/4100 Power source 1 Phase, 220/240V, 50Hz Cooling input 1.320/1.405 Running current (Cooling) 6.4/6.4 Heating input 1.335/1.460 Running current (Heating) 6.5/6.5 Inrush current 33.6/36.6 COP (In cooling) 2.65/2.49 Sound level...

  • Page 7: Range Of Usage & Limitations

    1.2.2 Range of usage & limitations Models All models Item Indoor return air temperature (Upper, lower limits) Refer to the selection chart Outdoor air temperature (Upper, lower limits) Refrigerant line (one way) length Max. 15m Vertical height difference between Max. 5m (Outdoor unit is higher) outdoor unit and indoor unit Max.
  • Page 8 Model SRK408HENF-L3 Unit: mm Room temp. sensor Piping hole right (left) Terminal block Remote controller Piping for Gas (Ø12.7) 390 Piping for Liquid (Ø6.35) 440 Drain hose 600 (Ø16) Piping hole Piping hole (Ø65) (Ø65) VIEW A (2) Outdoor unit Models SRC50HA, 56HA 286.4 Drain hole...

  • Page 9: Piping System

    (Liquid) valve (Gas) Flare fitting Flare fitting 6.35 (1/4˝) 12.7 (1/2˝) Ø Ø 1.2.4 Piping system Models SRK50HA, 56HA Cooling cycle Heating cycle Indoor unit Outdoor unit Service valve (Gas) Flare connecting High pressure switch(63H) (for fan motor control) Piping (Gas) Ø12.7...
  • Page 10 Model SRK408HENF-L3 Cooling cycle Heating cycle Indoor unit Outdoor unit Service valve (Gas) High pressure switch (63H) (for fan motor control) Flare connecting Piping (Gas) Ø12.7 Check joint Discharge Room temperature sensor Accumulator Compressor Heat 4way valve Heat exchanger exchanger Heat exchanger sensor Suction...

  • Page 11: Selection Chart

    1.00 How to obtain the cooling and heating capacity Example : The net cooling capacity of the model SRK50HA with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 45000 0.975...

  • Page 12: Electrical Data

    52X1 250V 3.15A Wireless R-Amp Display Back up sw Printed circuit board Color symbol Note(1) This figure shows SRK56HA. As for SRK50HA, 51C differs as shown in the fig- Black ure below. Blue Brown Orange White Yellow Y/GN Yellow/Green Meaning of marks...
  • Page 13 Model SRK408HENF-L3 Indoor unit Outdoor unit Y/GN Power source 1 Phase 220/240V 50Hz Y/GN 52C3 52C4 20S 23D 250V 3.15A Wireless R-Amp Display Printed circuit board Color symbol Black Blue Brown Orange White Y/GN Yellow/Green Meaning of marks Symbol Parts name Symbol Parts name Capacitor for CM...

  • Page 14: Outline Of Operation Control By Microcomputer

    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.
  • Page 15 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...
  • Page 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. Starting time of operation S 50, 56 models During cooling and During heating dry operation...
  • Page 17 (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.
  • Page 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 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.
  • Page 19 (9) Fan control (a) Fan speed change Mode COOL HEAT Fan speed knob AUTO See below Speed 2[1] (Speed 2[1]) Speed 3[2] (Speed 3[2]) Speed 2[1] (Speed 2[1]) 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)
  • Page 20 Function The indoor fan motor is controlled in accordance with the temperature of the indoor heat exchanger to send warm air from the start. 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.
  • Page 21 (11) DRY operation (a) Choose the appropriate operation block area by the difference between room temperature and thermo- stat setting temperature as shown below. ¡Operation block area D Block C Block B Block A Block –2 Room temp. – Setting temp.(deg) (b) Start up operation C.D Block A.B Block...
  • Page 22 (12) Dew condensation prevention control for cooling operation This prevents dew condensation, in the indoor unit, from occurring. Operating condition: when 52C is kept ON for 30 min. after the unit starts operation. 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 30 minutes.
  • Page 23 (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.
  • Page 24 (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 Set temp (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.

  • Page 25: Application Data

    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.

  • Page 26: Selection Of Location For Installation

    1.5.1 Selection of location for installation Unit : mm (1) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. Right side A solid place where the unit or the wall will not vibrate. Left side A place where there will be enough space for servicing.

  • Page 27: Installation Of Indoor Unit

    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) Adjustment of the installation and firmly install the unit after level surface has been checked. board in the horizontal direction is to be conducted with lour screws in a temporary tightened state.
  • Page 28 (3) Preparation of indoor unit (a) Mounting of connecting wires Suction grille S 50, 56 models 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 Wiring clamp unit.

  • Page 29: Installation Of Outdoor Unit

    [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 ¡...

  • Page 30: Refrigerant Piping

    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 Dimension A Liquid side (φ6.35): 9-9.5 dia Gas side Press Press (Do not (φ12.7): 16.2-17 dia...

  • Page 31: Test Run

    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. 10m : Additional charge amount per meter = 20g/m 10m over 15m : Additional charge amount per meter = 30g/m [Example : 50 model] How much amount of additional charge for 15m piping?

  • Page 32: Precautions For Wireless Remote Controller Installation And Operation

    (220/230/240V) Model SRK50HA SRK56HA Item Cooling – – High pressure MPa(kgf/cm 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) Low pressure MPa(kgf/cm Heating – – Cooling 12 ~ 16 12 ~ 16 Temp.

  • Page 33: Maintenance Data

    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 opera- tions as mis-operations.
  • Page 34 (2) Indication of Self Diagnosis (Indoor unit) Connect of Defect Place of defect RUN lamp is flashing. Abnormality of heat ¡ Disconnection of heat exchanger thermistor. exchanger thermistor. (1 Time flash.) TIMER lamp RUN lamp is flashing. Abnormality of room ¡...
  • Page 35 Anormality of thermistor Disconnection of thermistor and defective connection of connector Chart for thermistor temperature resistance characteristics Is connection to connector Repair connector. good? (Disconnection) Is thermistor resistance Replace thermistor. value normal? (kΩ) Replace PCB. (Short circuit) Temperature (°C) (4) Trouble Diagnostic Procedures Remove receptacle.
  • Page 36 (5) Trouble shooting chart for the room temperature thermistor (Th ), heat exchanger thermistor (Th ) and defrost thermostat (23DH) Function Unit Thermistor Operation Short circuit Broken connection Continuous Cooling operation Cooling will not operate ¡ Cannot be turned ON/OFF by thermostat ¡...

  • Page 37: Servicing

    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.

  • Page 38: Power Supply Remote Operation

    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. (1) Operation contents (a) Heat pump type Operation change...
  • Page 39 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. 52X1 (FMI)
  • Page 40 MEMO...

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