Technibel MCAF92R5TA Technical Data & Service Manual
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Technibel MCAF92R5TA Technical Data & Service Manual

Split system air conditioner indoor unit
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TECHNICAL DATA
& SERVICE MANUAL
INDOOR UNIT: MCAF72R5TA-
SPLIT SYSTEM AIR CONDITIONER
Model No.
MCAF72R5TA-
MCAF92R5TA-
MCAF122R5TA-
MCAF92R5TA-
MCAF122R5TA-
Product Code No.
387104015
387104016
387104017
0.8180.354.0
04/2004

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  • Page 1 TECHNICAL DATA & SERVICE MANUAL INDOOR UNIT: MCAF72R5TA- MCAF92R5TA- MCAF122R5TA- SPLIT SYSTEM AIR CONDITIONER Model No. Product Code No. MCAF72R5TA- 387104015 MCAF92R5TA- 387104016 MCAF122R5TA- 387104017 0.8180.354.0 04/2004...
  • Page 2 • Ground the unit following local electrical codes. IMPORTANT! • The Yellow/Green wire cannot be used for any connection Please read before installation different from the ground connection. • Connect all wiring tightly. Loose wiring may cause overheating This air conditioning system meets strict safety and operating at connection points and a possible fire hazard.

  • Page 3: Table Of Contents

    Table of Contents Page 1. SPECIFICATIONS 1-1 Unit specifications 1-2 Major Component specifications 1-3 Other Component specifications 2. DIMENSIONAL DATA 3. PERFORMANCE DATA 3-1 Air Throw Distance Chart 4. ELECTRICAL DATA 4-1 Electric Wiring Diagrams 5. FUNCTION 5-1 Cool Mode Operation 5-2 Heat Mode Operation 5-3 Auto (cool/heat) Mode Operation 5-4 Dry Mode Operation...

  • Page 4: Specifications

    1. SPECIFICATIONS 1-1 Unit Specifications MCAF72R5TA- 220 - 240 V ~ 50 Hz Power source 230 V - 50 Hz Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High) m³/h Features Microprocessor/ I.C. thermostat Controls/Temperature controls Wireless remote control unit Control unit...
  • Page 5 MCAF92R5TA- 220 - 240 V ~ 50 Hz Power source 230 V - 50 Hz Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High) m³/h Features Microprocessor/ I.C. thermostat Controls/Temperature controls Wireless remote control unit...
  • Page 6 MCAF122R5TA- 220 - 240 V ~ 50 Hz Power source 230 V - 50 Hz Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High) m³/h Features Microprocessor/ I.C. thermostat Controls/Temperature controls Wireless remote control unit Control unit Timer ON/OFF 24 hours...

  • Page 7: Major Component Specifications

    1-2 Major Component Specifications MCAF72R5TA- Controller PCB Part No. Controls Microprocessor Control circuit fuse 250 V - 3,15 A RC-2 (RC) Remote Control Unit Fan & Fan Motor Cross - flow Type 1…. Ø 95 / L 617 Q'ty ……. Dia. and lenght KFV4Q-11H5P-S…1 Fan motor model…Q'ty 4…1160...
  • Page 8 MCAF92R5TA- Controller PCB Part No. Controls Microprocessor Control circuit fuse 250 V - 3,15 A RC-2 (RC) Remote Control Unit Fan & Fan Motor Cross - flow Type 1…. Ø 95 / L 617 Q'ty ……. Dia. and lenght KFV4Q-11H5P-S…1 Fan motor model…Q'ty...
  • Page 9 MCAF122R5TA- Controller PCB Part No. Controls Microprocessor Control circuit fuse 250 V - 3,15 A RC-2 (RC) Remote Control Unit Fan & Fan Motor Cross - flow Type 1…. Ø 95 / L 617 Q'ty ……. Dia. and lenght KFV4Q-11H5P-S…1 Fan motor model…Q'ty 4…1250 No.

  • Page 10: Other Component Specifications

    1-3 Other Component Specifications MCAF72R5TA- MCAF92R5TA- MCAF122R5TA- TPN41-0001 Trasformer (TR) AC 230 V, 50 Hz Rating Primary 12 V - 300 mA Secondary Capacity Coil resistance Ω (at 25°C) Primary: 495 Secondary: 2,86 125°C Thermal cut-off temp. Thermistor ( Coil sensor ) NTC-THERMISTOR 10 at 25 °C...

  • Page 11: Dimensional Data

    2. DIMENSIONAL DATA Drain hose ø18 99.5 58.5 Narrow tube ø6.35 (1/4") Center of tubing hole (2 places) Unit : mm Wide tube ø9.52 (3/8")

  • Page 12: Performance Data

    3. PERFORMANCE DATA 3-1 Air Throw Distance Chart MCAF72R5TA- Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) : Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30° Heating Room air temp.
  • Page 13 MCAF92R5TA- Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) : Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30° Heating Room air temp. : 20°C Fan speed...
  • Page 14 MCAF122R5TA- Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) : Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30° Heating Room air temp. : 20°C Fan speed High Horizontal distance (m) : Flap angle 45°...

  • Page 15: Electrical Data

    4. ELECTRICAL DATA 4-1 Electric Wiring Diagrams...

  • Page 16: Function

    5.FUNCTION 5-1 Cool Mode Operation (RT - SPT) [ over 3 min over 5 min COMP OFAN over 30 sec IFAN In Cool Mode, the operation of the Compressor (COMP), Outdoor Fan (OFAN) and Indoor Fan (IFAN) are determined by the difference between the Room Temperature (RT) and the Set Point Temperature (SPT) as in the graph above.

  • Page 17: Heat Mode Operation

    5-2 Heat Mode Operation (RT - SPT) [ COMP 30 sec IFAN Note 1 Note 2 The Heat Mode operation is similar to the Cool Mode operation. The COMP, OFAN and IFAN are mainly controlled by the value of (RT – SPT). In the graph above, the IFAN is operating in Auto Fan speed mode. Therefore, the IFAN speed changes automatically according to the (RT - SPT).

  • Page 18: Auto (Cool/Heat) Mode Operation

    5-3 Auto (Cool/Heat) Mode Operation (RT - SPT) [ COMP & OFAN Auto Heat Mode Auto Cool Mode Auto Heat Mode In Auto Mode, the unit switches between the Auto Cooling Mode and Auto Heating Mode automatically to maintain the room temperature (RT) at the set point temperature (SPT).

  • Page 19: Dry Mode Operation

    5-4 Dry Mode Operation (RT - SPT) [ Time [min] DRY-ON DRY-OFF IFAN 5 minutes COMP ON time COMP & OFAN 3.5 min Max 15 minutes Max 15 minutes 6 min (Note 2) (Note 1) In Dry Mode, the unit operates in a mild cool mode to lower the humidity of the room. In order to maintain a high efficiency in the drying operation without over lowering the room temperature excessively, the Dry Mode is different from the Cool Mode in two ways.

  • Page 20: Protection Operations In Cool And Dry Modes

    5-6 Protection Operations in Cool and Dry Modes 1. Indoor Coil Defrost Protection The in-coil defrost protection can prevent the ice formation at the in-coil when the ambient temperature is low. ICT [ OFAN COMP IFAN t1 = 5 min minimum for each COMP starting t2 = OFAN cycling (alternate between ON and OFF every 30 sec) for 20 min maximum t3 = COMP and OFAN stop for 10 min minimum...
  • Page 21 2. Outdoor Coil High Pressure Protection The out-coil high pressure protection prevent the build up of high pressure at the out-coil during cooling operation. OCT [ COMP is forced OFF COMP OFAN follow operation of COMP OFAN is forced ON (Note 1) OFAN IFAN is forced LOW IFAN...

  • Page 22: Protection Operation In Heat Mode

    5-7 Protection Operations in Heat Mode 5-7-1 Outdoor Coil Deice Protection The deice process is controlled by an Ice Detection Algorithm (IDA). The IDA is an unique control algorithm incorporated to maintain optimal utilization of the heat pump capacity, especially in below-zero outdoor temperature condition.
  • Page 23 1st COMP start, OR deice complete Reset TLD cnt to 0 DTF = 0 IFAN/OFAN speed change Reset SCT cnt to 0 DTF = 0 TLD > TST SCT > SCD DDT = OCT - TempD DTF = 1 DDT and DTF information to main algorithm Explanation: The “Ice Forming Detection”...
  • Page 24 5-7-2 Indoor Coil High Pressure Protection in Heat Mode The in-coil high pressure protection prevent the build up of high pressure at the in-coil during heating operation. ICT [ COMP is forced OFF COMP OFAN Note: The operation temperatures shown as A and B in the chart differ by models.

  • Page 25: Cold Draft Prevention (Heating)

    5-8 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. • When 10 minutes has elapsed, the fan speed is automatically switched to set speed regardless of indoor heat exchange coil temperature.

  • Page 26: Other Function

    5-9-1 Sleep Function Room temperature is automatically controlled to compensate for body temperature variations while sleeping. This mode of operation is designed for maximal comfort in both COOL and HEAT modes. Unit is turned to SB 7-12 Hours Sleep operation after Sleep SPT+3 Cool, Dry modes...
  • Page 27 5-9-5 Manual Unit Control and LED indicators The push button switch and the LED indicators on the display panel let the user to control the unit operation without a remote controller. Their operations are provided below. LED indicators: 1. Lights up when the Air Conditioner is connected to power and STAND BY ready to receive the R/C commands INDICATOR...

  • Page 28: Troubleshooting

    6. TROUBLESHOOTING 6-1. 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. 6-1-1. Check power supply wiring. G Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the indoor unit.

  • Page 29: Air Conditioner Does Not Operate

    6-2. Air conditioner does not operate. 6-2-1. Circuit breaker trips (or fuse blows). A. When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.) G There is a possibility of ground fault. G Check insulation resistance. If resistance value is 2MΩ...
  • Page 30 • There is a possibility of short circuit • Replace with suitable one Check capacity of circuit breaker. (lager capacity) Capacity of circuit breaker is suitable. In case of Heating operation: • • Measure resistance of outdoor Measure resistance of 4-way fan motor winding valve’s winding •...
  • Page 31 C. Check remote control unit. • Try to run with another remote control unit. First remote control unit is defective. • Check for residue buildup on Clean transmitter. transmitter of remote control unit. • Check for residue buildup on remote Clean receiver.
  • Page 32 6-2-3. 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 ( button).

  • Page 33: Some Part Of Air Conditioner Does Not Operate

    6-3. Some part of air conditioner does not operate. 6-3-1. 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 34 6-3-4. Only compressor does not run. Overload relay is working. • Check compressor motor (Either OLR T or OLR A) capacitor. (C1) • Measure resistance of Temperature of compressor is abnormally high. compressor motor winding. Refrigerant gas shortage. Charge refrigerant gas (R22). •...

  • Page 35: Air Conditioner Operates, But Abnormalities Are Observed

    6-4 Air conditioner operates, but abnormalities are observed 6-4-1 Operation does not switch from HEAT to COOL (or COOL to HEAT). • Reciver in lamp Ass’y may be Remote control unit may be detective. detective. • Measure resistance of 4-way valve’s winding COOL HEAT...
  • Page 36 6-4-2. 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 37: If A Sensor Is Defective

    6-5 If a sensor is defective 6-5-1 ICT (indoor coil sensor) OCT(outdoor coil sensor) RAT (room ambient temperature) are defective. • • Stand by lamp on front side of indoor Thermistor ICT and OCT and RAT are unit is flashing on and off. (*) defective •...

  • Page 38: Checking Electrical Components

    7. CHECKING ELECTRICAL COMPONENTS 7-1. Measurement of Insulation power plug (Local supply) Resistance G The insulation is in good condition if the resistance Ground exceeds 2MΩ. probe 7-1-1. Power Supply Wires Insulation tester Clamp the grounding terminal of the power plug with a NOTE lead clip of the insulation resistance tester and The shape of the power plug may differ from that...

  • Page 39: Checking Continuity Of Fuse On Pcb Ass'y

    7-2. Checking Continuity of Fuse Fuse on PCB Ass'y G Remove the PCB Ass’y from the electrical component box. Then pull out the fuse from the PCB Ass’y. (Fig. 5) PCB Ass’y G Check for continuity using a multimeter as shown in Fig.
  • Page 40 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...

This manual is also suitable for:

Mcaf72r5taMcaf122r5taKaf94r5ta series

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