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Technibel GR54M2R Technical Data & Service Manual

Multi-split system air conditioner
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TECHNICAL DATA & SERVICE MANUAL
Outdoor Unit
Indoor Unit
GR54M2R
MCA27RM (X2)
MULTI-SPLIT SYSTEM AIR CONDITIONER
Indoor Unit
Outdoor Unit
MCA27RM
GR54M2R
0.8180.180.0
03/2001

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Summary of Contents for Technibel GR54M2R

  • Page 1 TECHNICAL DATA & SERVICE MANUAL Outdoor Unit Indoor Unit GR54M2R MCA27RM (X2) MULTI-SPLIT SYSTEM AIR CONDITIONER Indoor Unit Outdoor Unit MCA27RM GR54M2R 0.8180.180.0 03/2001...
  • Page 2 IMPORTANT! Please Read Before Starting When Installing… This air conditioning system meets strict safety and operat- ing standards. As the installer or service person, it is an …In a Ceiling or Wall important part of your job to install or service the system Make sure the ceiling/wall is strong enough to hold the so it operates safely and efficiently.

  • Page 3: Table Of Contents

    Table of Contents Page Unit Combination........................1. OPERATING RANGE ..........................2. SPECIFICATIONS 2-1. Unit Specifications ..........................2-2. Major Component Specifications......................2-3. Other Component Specifications......................3. DIMENSIONAL DATA..........................4. COOLING CAPACITY..........................5. HEATING CAPACITY ..........................6. AIR THROW DISTANCE CHART ....................... 7.

  • Page 4: Unit Combination

    Unit Combination Combine indoor and outdoor units only as listed below. Symbol of Outdoor Unit Indoor Unit Refer to Indoor Unit MCA27RM GR54M2R Fig.1 MCA27RM Indoor Unit Outdoor Unit Fig.1...

  • Page 5: Operating Range

    1. OPERATING RANGE Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 32°C D.B. / 23°C W.B. 43°C D.B. Cooling Minimum 19°C D.B. / 14°C W.B. 19°C D.B. Maximum 27°C D.B. 24°C D.B. / 18°C W.B. Heating Minimum 16°C D.B. –...

  • Page 6: Specifications

    2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit MCA27RM ( 1) Outdoor Unit GR54M2R No. of indoor units. 1-unit Power Source 220 – 240 V ~ 50 Hz Cooling Heating 2.60 / 2.60 / 2.65 3.25 / 3.25 / 3.30 Capacity...
  • Page 7 Indoor Unit MCA27RM ( 2) Outdoor Unit GR54M2R No. of indoor units. 2-unit Power Source 220 – 240 V ~ 50 Hz Cooling Heating 5.00 / 5.00 / 5.10 6.25 / 6.30 / 6.35 Capacity BTU/h 17,100 / 17,100 / 17,400...

  • Page 8: Major Component Specifications

    2-2. Major Component Specifications Indoor Unit MCA27RM Part No. POW–KM98EH(A), POW–K8EH(B) Controls Microprocessor Control circuit fuse 250 V – 3.15 A Remote Control Unit RCS–8MHPS3E Type Cross–flow Q'ty ... Dia. and length 1 ... ø95 / L617 Fan motor model ... Q'ty KFV4Q–11H5P–S ...
  • Page 9 Outdoor Unit GR54M2R Controller PCB POW–186CMH Control circuit fuse 250 V– 3 A Type Rotary (Hermetic) Compressor model ... Q'ty C–R95H5K ... 2 / 80696745–S ... 2 Nominal output 950 x 2 Compressor oil ... Amount SUNISO 4GSD–T ... 650 x 2 Ω...

  • Page 10: Other Component Specifications

    0°C 15.0 ± 2% Thermistor (Room sensor) DTN-TKS134B Resistance kΩ 25°C 5.0 ± 3% Outdoor Unit GR54M2R Power Relay (PRA, PRB) DFU24D1-F (M) Coil rating DC 24V Ω (at 20°C) Coil resistance 650 ± 10% Contact rating AC 250V, 20A...

  • Page 11: Dimensional Data

    3.DIMENSIONAL DATA Indoor Unit MCA27RM...
  • Page 12 Outdoor Unit GR54M2R Air intake 4 – ø12 holes Air discharge Magnified illustration To Indoor Unit A To Indoor Unit B Narrow tube service valve ø6.35(1/4") Wide tube service valve ø9.52(3/8") 3 Check Port Unit : mm...

  • Page 13: Cooling Capacity

    4. COOLING CAPACITY ×1) Indoor Unit MCA27RM ( Outdoor Unit GR54M2R 230 V Single phase 50 Hz RATING CAPACITY 2.60 kW AIR FLOW RATE 470 m EVAPORATOR CONDENSER ENT. TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 2.62 2.51 2.39 2.28...

  • Page 14: Heating Capacity

    5. HEATING CAPACITY MCA27RM ( ×1) Indoor Unit Outdoor Unit GR54M2R –8 –5 Outdoor temperature (°C D.B.) NOTE … Point of Rating condition Black dot in the chart indicate the following rating condition. Indoor : 20°C D.B. Outdoor : 7°C D.B. / 6°C W.B.

  • Page 15: Air Throw Distance Chart

    6. AIR THROW DISTANCE CHART Indoor Unit MCA27RM Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) Axis air velocity 0° Flap angle 30° Heating Room air temp. : 20°C Fan speed High Horizontal distance (m) Axis air velocity 45°...

  • Page 16: Refrigerant Flow Diagram

    7. REFRIGERANT FLOW DIAGRAM MCA27RM ( ×2) Indoor Unit Outdoor Unit GR54M2R Cooling cycle Indoor Unit A Compressor A Wide tube Accumulator O.D. 9.52mm (3/8") 4 – Way Muffler valve Check Narrow tube port O. D. 6.35mm Check valve Drier (1/4")
  • Page 17 Heating cycle Indoor Unit A Compressor A Wide tube Accumulator O.D. 9.52mm (3/8") 4 – Way Muffler valve Check Narrow tube port O.D. 6.35mm Check valve Drier (1/4") Strainer Capillary tube Indoor Unit B Accumulator Compressor B Wide tube O.D. 9.52mm (3/8") 4 –...

  • Page 18: Electrical Data

    The values in the table below indicate the sum of indoor and outdoor units which are in running condition. Indoor Unit MCA27RM Outdoor Unit GR54M2R Cooling 230V Single phase 50 Hz 1 - Unit 2 - Units Number of indoor unit...

  • Page 19: Electric Wiring Diagram

    8-2. Electric Wiring Diagram Indoor Unit MCA27RM...
  • Page 20 Outdoor Unit GR54M2R...

  • Page 21: Performance Charts

    8-3. Performance Charts Indoor Unit MCA27RM ( 1) Outdoor Unit GR54M2R ■ Cooling Characteristics ■ Heating Characteristics Indoor inlet air Indoor inlet air D.B. temp. (°C) D.B. temp. (°C) –5 Outdoor inlet air D.B. temp. (°C) Outdoor inlet air D.B. temp. (°C)

  • Page 22: Function

    9.FUNCTION 9-1. Room Temperature Control Cooling Room temperature control is obtained by cycling the compressor ON and OFF under control of the room tem- perature sensor in the remote control unit. The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the controller in the indoor unit.
  • Page 23 Heating Room temperature control is obtained by cycling the compressor ON and OFF under control of the room tem- perature sensor in the remote control unit. The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the controller in the indoor unit.

  • Page 24: Dry Operation

    9-2. Dry Operation (Dehumidification) Dry operation uses the ability of the cooling cycle to remove moisture from the air, but by running at low level to dehumidify without greatly reducing the room temperature. The air conditioner repeats the cycle of turning ON and OFF automatically as shown in the chart below according to the room temperature.

  • Page 25: Freeze Prevention

    9-3. Freeze Prevention (Cooling) This function prevents freezing of the indoor heat exchange coil. When the compressor has been running for 10 minutes or more and the temperature of the indoor heat exchange coil falls below –1°C, the control circuit stops the compressor for at least 6 minutes. The compressor does not start again until the temperature rises above 8°C or 6 minutes has elapsed.

  • Page 26: Cold Draft Prevention

    9-5. Cold Draft Prevention (Heating) This function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat exchange coil have sufficiently warmed up. STANDBY lamp on front of the indoor unit lights up when the indoor fan speed is either LL or OFF. 35°C Indoor heat exch.

  • Page 27: Defrosting Operation

    9-6. Defrosting Operation (Heating) Defrosting Flowchart. * Split System A: Indoor unit A Split System A (or B) Split System B (or A) Compressor A Solenoid coil A * Split System B: Indoor unit B Compressor B Heating operation Heating operation Solenoid coil B 20 minutes masking 6 minutes masking...
  • Page 28 Defrosting Mode Timing Chart Start of defrosting Release of defrosting Defrosting 13.5 min. or outdoor coil temp. 26°C 65 sec. 65 sec. Compressor A 5 sec. 5 sec. 5 sec. Compressor B 1 min. 4-way valve A and B Outdoor fan 30 sec.

  • Page 29: Troubleshooting

    10.TROUBLESHOOTING 10-1. Check before and after troubleshooting WARNING Hazardous voltage can cause ELECTRIC SHOCK or DEATH. Disconnect power or turn off circuit breaker before you start checking or servicing. 10-1-1.Check power supply wiring. Check that power supply wires are correctly connect- Outdoor ed to terminals No.1 and No.2 on the 3p terminal unit...

  • Page 30: Air Conditioner Does Not Operate

    10-2. Air conditioner does not operate. 10-2-1.Circuit breaker trips (or fuse blows). A. When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.) There is a possibility of ground fault. Check insulation resistance. If resistance value is 2MΩ or less, insulation is defective (“NO”). Set circuit breaker to OFF.
  • Page 31 10-2-2.Neither indoor nor outdoor unit runs. A. Power is not supplied. Circuit breaker Reset breaker. is tripped. • Check power supply. Power is being supplied to the Wait for recovery outdoor unit. Power failure or contact power company. B. Check "OPERATION selector" switch in the indoor unit. Switch Ass'y or indoor PCB Ass'y •...
  • Page 32 D. Check fuse on the indoor PCB Ass'y. • Measure resistance of indoor fan If fuse has been blown, • Check fuse on indoor PCB Ass'y motor winding. for continuity. (FMI) • Check operation lamp to see • Measure resistance of flap motor if light is ON.
  • Page 33 10-2-3.Only outdoor unit does not run. A. Check setting temperature. COOL HEAT Is room temperature too low ? Is room temperature too high ? Try to lower setting temperature by Try to raise setting temperature by temperature setting button cooler. temperature setting button warmer.

  • Page 34: Some Part Of Air Conditioner Does Not Operate

    10-3. Some part of air conditioner does not operate. 10-3-1.Only indoor fan does not run. • Check fan casing Remove foreign foreign matter on matter or repair. Fan cannot inside. be turned. • Check fan rotation. Turn fan gently once or twice by hand.
  • Page 35 10-3-4.Only compressor does not run. Check compressor motor • Overload relay is working. Measure coil resistance of capacitor. power relay. (PRA,PRB) (CA,CB) (OLR 1 to 4) Measure resistance of • Temperature of compressor is compressor motor winding. abnormally high. Refrigerant gas shortage. Charge refrigerant gas (R22).

  • Page 36: Air Conditioner Operates, But Abnormalities Are Observed

    10-4. Air conditioner operates, but abnormalities are observed. 10-4-1.Operation does not switch from HEAT to COOL (or COOL to HEAT). • Remote control unit may be defective. Receiver in switch Ass'y may be defective. • Measure resistance of 4–way valve's winding.
  • Page 37 10-4-2.Poor cooling or heating. • Check position of remote control unit. Change position of remote Cool or warm air from air conditioner • control unit. reaches position directly. • Wide and narrow tubes between Insulate both wide and narrow indoor unit and outdoor unit are tubes separately and then insulated.

  • Page 38: If A Sensor Is Defective

    10-5. If a sensor is defective. 10-5-1.Indoor coil temp. thermistor (TH1) is defective. • Operation lamp on front side of • Thermistor (TH1 ) is defective. indoor unit is flashing on and off. (*) (That is, sensor is SHORT.) • Replace thermistor. NOTE Alarm Signal (*) Operation lamp on the front side of the indoor unit will flash on and off when the indoor coil thermistor is defective.

  • Page 39: Arrangement Of Electrical Components

    11. ARRANGEMENT OF ELECTRICAL COMPONENT Outdoor Unit GR54M2R PCB Ass'y (Controller) Parts Layout in Unit Heat exchenger coil Thermistor Compressor A (CMA) Compressor B (CMB) PCB Ass'y Solenoid coil B (SCB) Solenoid coil A (SCA) Fan motor Electric Parts Compressor motor capacitor (CA)

  • Page 40: Checking Electrical Components

    12. CHECKING ELECTRICAL COMPONENTS 12-1. Measurement of Insulation Ground wire Resistance Clip The insulation is in good condition if the resistance exceeds 2MΩ. Probe 12-1-1. Power Supply Wires Insulation tester Fig. 1 Clamp the ground wire of the power supply wires with the lead clip of the insulation resistance tester and mea- Terminal plate sure the resistance by placing a probe on either of the...

  • Page 41: Checking Continuity Of Fuse On Pcb Ass'y

    12-2. Checking continuity of Fuse on Fuse PCB Ass'y Check for continuity using a multimeter as shown in Fig. 6. NOTE PCB Ass’y Method Used to Replace Fuse on PCB Ass'y Fig. 5a — Indoor PCB Ass'y — 1. Remove the PCB Ass'y from the electrical component Soldering iron 2.
  • Page 42 R.D. 28 Reyrieux BP 131 - 01601 Trévoux CEDEX France Tél. 04.74.00.92.92 - Fax 04.74.00.42.00 R.C.S. Bourg-en-Bresse B 759 200 728...

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