Technibel MCAV77R5VAA Technical & Service Manual
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Technibel MCAV77R5VAA Technical & Service Manual

Split system air conditioner
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7(&+1,&$/
63/,7 6<67(0 $,5 &21',7,21(5
Indoor Unit
KPA128R5TAA
Floor-Mounted
Ceiling-Mounted
MCAV77R5VAA
MCAV97R5VAA
MCAV127R5VAB
KPA128R5TAA
MCAV77R5VAA
MCAV97R5VAA
MCAV127R5VAB
6(59,&( 0$18$/
-
GR79R5TBA
-
GR99R5TBA
-
GR129R5TBA
-
GR129R5TBA
0.8180.072.0
04/2001
Outdoor Unit
GR79R5TBA
GR99R5TBA
GR129R5TBA

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  • Page 1 7(&+1,&$/ 6(59,&( 0$18$/ MCAV77R5VAA GR79R5TBA MCAV97R5VAA GR99R5TBA MCAV127R5VAB GR129R5TBA KPA128R5TAA GR129R5TBA 63/,7 6<67(0 $,5 &21',7,21(5 Indoor Unit Outdoor Unit MCAV77R5VAA MCAV97R5VAA MCAV127R5VAB KPA128R5TAA Floor-Mounted GR79R5TBA GR99R5TBA GR129R5TBA Ceiling-Mounted 0.8180.072.0 04/2001...
  • Page 2 Important! When Transporting Be careful when picking up and moving the indoor and Please Read Before Starting outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp This air conditioning system meets strict safety and edges or thin aluminum fins on the air conditioner can operating standards.

  • Page 3: Table Of Contents

    Table of Contents Page 1. OPERATING RANGE ..........................1 2. SPECIFICATIONS 2-1. Unit Specifications .......................... 2 2-2. Major Component Specifications....................6 2-3. Other Component Specifications....................13 3. DIMENSIONAL DATA..........................14 4. REFRIGERANT FLOW DIAGRAM ......................17 5. PERFORMANCE DATA 5-1. Performance charts ........................19 5-2.

  • Page 4: 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 5: Specifications

    2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit MCAV77R5VAA Outdoor Unit GR79R5TBA Power Source 220–240V ~ 50Hz Voltage rating 230 V Performance Cooling Heating Capacity 2.30 2.70 BTU/h 7,843 9200 Air circulation (High) Moisture removal (High) Liters/h — Electrical Rating Cooling...
  • Page 6 Indoor Unit MCAV77R5VAA Outdoor Unit GR79R5TBA Power Source 220–240V ~ 50Hz Voltage rating 230 V Performance Cooling Heating Capacity 2.60 3.45 BTU/h 8870 11760 Air circulation (High) Moisture removal (High) Liters/h — Electrical Rating Cooling Heating Available voltage range 198 ~ 264...
  • Page 7 Indoor Unit MCAV127R5VAB Outdoor Unit GR129R5TBA Power Source 220–240V ~ 50Hz Voltage rating 230 V Performance Cooling Heating Capacity 3.40 4.10 BTU/h 11590 13980 Air circulation (High) Moisture removal (High) Liters/h — Electrical Rating Cooling Heating Available voltage range 198 ~ 264 Running amperes Power input 1270...
  • Page 8 Indoor Unit KPA128R5TAA Outdoor Unit GR129R5TBA Power Source 220–240V ~ 50Hz Voltage rating 230 V Performance Cooling Heating Capacity 3.35 3.90 BTU/h 11,424 13,299 Air circulation (High) Moisture removal (High) Liters/h — Electrical Rating Cooling Heating Available voltage range 198 ~ 264 Running amperes Power input 1,220...

  • Page 9: Major Component Specifications

    2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit MCAV77R5VAA Controller Part No. POW-K78EH(A), POW-K8EH(B) Controls Microprocessor Control circuit fuse 250 V 3.15 A Remote Control Unit RCS-8HPS3E Fan & Fan Motor Type Cross-flow Q'ty ... Dia. and length 1 ... ø95 / L617 Fan motor model ...
  • Page 10 Indoor Unit MCAV97R5VAA Controller Part No. POW-K78EH(A), POW-K8EH(B) Controls Microprocessor Control circuit fuse 250 V 3.15 A Remote Control Unit RCS-8HPS3E Fan & Fan Motor Type Cross-flow Q'ty ... Dia. and length 1 ... ø95 / L617 Fan motor model ... Q'ty KFV4Q-11H5P-S ...
  • Page 11 Indoor Unit MCAV127R5VAB Controller Part No. POW-K128EH(A), POW-K8EH(B) Controls Microprocessor Control circuit fuse 250 V 3.15 A Remote Control Unit RCS-8HPS3E Fan & Fan Motor Type Cross-flow Q'ty ... Dia. and length 1 ... ø95 / L617 Fan motor model ... Q'ty KFV4Q-11H5P-S ...
  • Page 12 Indoor Unit KPA128R5TAA Controller PCB Part No. POW-K126GHS-(C) Controls Microprocessor Control circuit fuse 250 V 3.15 A Remote Control Unit RCS-6HPS3E Fan & Fan Motor Type Cross-flow Q'ty ... Dia. and length 2 ... ø130 / L180 Fan motor model ... Q'ty K48407-M01596 ...
  • Page 13 2-2-2. Outdoor Unit Outdoor Unit GR79R5TBA Controller POW-C96GH Compressor Type Rotary (Hermetic) Compressor model RH 145 VHAT Nominal output Compressor oil ... Amount DIAMOND MS56 ... 300 Ω Coil resistance (Ambient temp. 25°C) C–R : 4.11±7% C–S : 6.04±7% Safety devices Type Internal protector (K) Operating temp.
  • Page 14 Outdoor Unit GR99R5TBA Controller POW-C96GH Compressor Type Rotary (Hermetic) Compressor model RH 174 VHAT Nominal output Compressor oil ... Amount DIAMOND MS56 ... 300 Ω Coil resistance (Ambient temp. 25°C) C–R : 3.4±7% C–S : 6.13±7% Safety devices Type Internal protector (K) Operating temp.
  • Page 15 Outdoor Unit GR129R5TBA Controller POW-C96GH Compressor Type Rotary (Hermetic) Compressor model RH 231 VHFT Nominal output 1,100 Compressor oil ... Amount DIAMOND MS56 ... 520 Ω Coil resistance (Ambient temp. 25°C) C–R : 2.17±7% C–S : 3.99±7% Safety devices Type Internal protector (K) Operating temp.

  • Page 16: Other Component Specifications

    2-3. Other Component Specifications Indoor Unit MCAV77R5VAA MCAV97R5VAA MCAV127R5VAB KPA128R5TAA Transformer (TR) ATR-J105 Rating Primary AC 230V, 50 / 60 Hz Secondary 19V, 0.526A Capacity 10VA Ω (at 21°C) Coil resistance Primary (WHT – WHT): 205 ± 10% Secondary (BRN – BRN): 2.0 ±...

  • Page 17: Dimensional Data

    3. DIMENSIONAL DATA Indoor Unit MCAV77R5VAA MCAV97R5VAA MCAV127R5VAB Drain hose ø18 Remote control unit 18.5 99.5 58.5 Narrow tube ø6.35 (1/4") Center of tubing hole (2 places) Wide tube ø9.52 (3/8") MCAV77/97 Wide tube ø12.7 (1/2") MCAV127 Unit : mm...
  • Page 18 Indoor Unit KPA128R5TAA Center of tubing hole Remote control unit ø75 (4 places) Wide tube ø12.7 (1/2") Narrow tube ø6.35 (1/4") Drain hose ø26 18.5 Unit : mm...
  • Page 19 Outdoor Unit GR79R5TBA GR99R5TBA GR129R5TBA 4 – ø12 holes Air intake Wide tube service valve ø9.52 (3/8") GR79/99 ø12.7 (1/2") GR129 Narrow tube service valve Air discharge ø6.35 (1/4") Unit : mm...

  • Page 20: Refrigerant Flow Diagram

    4. REFRIGERANT FLOW DIAGRAM Indoor Unit MCAV77R5VAA Outdoor Unit GR79R5TBA Indoor unit Outdoor unit Accumulator Wide tube service Wide tube valve 4-way Muffler valve O.D. ø9.52 mm (3/8 ") Narrow tube service Capillary tube Narrow tube valve Capillary tube Cooling cycle...
  • Page 21 Indoor Unit MCAV127R5VAB- KPA128R5TAA Outdoor Unit GR129R5TBA Indoor unit Outdoor unit Accumulator Wide tube service Wide tube valve 4-way Muffler valve O.D. ø12.7 mm (1/2 ") Narrow Accumulator tube Capillary service tube Narrow tube valve Cooling cycle Strainer O.D. Capillary Check Strainer ø6.35 mm...

  • Page 22: Performance Data

    5. PERFORMANCE DATA 5-1. Performance charts Indoor Unit MCAV77R5VAA Outdoor Unit GR79R5TBA 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 23 Indoor Unit MCAV99R5VAA Outdoor Unit GR99R5TBA 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) Indoor inlet air Indoor inlet air 2.95 (30) 1.38 (13) D.B.
  • Page 24 Indoor Unit MCAV127R5VAB KPA128R5TAA Outdoor Unit GR129R5TBA 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) Indoor inlet air Indoor inlet air 1.38 (13) 2.95 (30) D.B.

  • Page 25: Air Throw Distance Chart

    5-2. Air Throw Distance Chart Indoor Unit MCAV77R5VAA 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 26 Indoor Unit MCAV97R5VAA 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° Flap angle 60°...
  • Page 27 Indoor Unit MCAV127R5VAB 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° Flap angle 60°...
  • Page 28 Indoor Unit KPA128R5TAA Ceiling mounted Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) Axis air verocity Flap angle 30° 45° Heating Room air temp. : 20°C Fan speed High Horizontal distance (m) Axis air verocity Flap angle 60°...

  • Page 29: Heating Capacity

    5-3. Heating Capacity –5 –8 Outdoor temperature (°C DB) 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. 2) Above characteristics indicate instantaneous operation, which does not take into consideration defrost operation.

  • Page 30: Electrical Data

    6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit MCAV77R5VAA Outdoor Unit GR79R5TBA COOLING Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V 1-phase 50Hz Rating Conditions Running Amps. 0.11 0.24 3.35 Power Input 0.025 0.055 0.710...
  • Page 31 Indoor Unit MCAV97R5VAA Outdoor Unit GR99R5TBA COOLING Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V 1-phase 50Hz Rating Conditions Running Amps. 0.12 0.24 4.05 Power Input 0.027 0.055 0.888 0.97 Full Load Conditions Running Amps. 0.12 0.24 4.74...
  • Page 32 Indoor Unit MCAV127R5VAB Outdoor Unit GR129R5TBA COOLING Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V 1-phase 50Hz Rating Conditions Running Amps. 0.13 0.28 5.39 Power Input 0.031 0.062 1.177 1.27 Full Load Conditions Running Amps. 0.13 0.28 6.79...
  • Page 33 Indoor Unit KPA128R5TAA Outdoor Unit GR129R5TBA COOLING Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V 1-phase 50Hz Rating Conditions Running Amps. 0.29 0.28 5.03 Power Input 0.07 0.062 1.088 1.22 Full Load Conditions Running Amps. 0.29 0.28 6.43...

  • Page 34: Electric Wiring Diagram

    6-2. Electric Wiring Diagrams To avoid electrical shock hazard, be sure to Indoor Unit MCAV77R5VAA disconnect power before checking, servicing MCAV97R5VAA WARNING MCAV127R5VAB and/or cleaning any electrical parts.
  • Page 35 To avoid electrical shock hazard, be sure to Indoor Unit KPA128R5TAA disconnect power before checking, servicing WARNING and/or cleaning any electrical parts.
  • Page 36 To avoid electrical shock hazard, be sure to Outdoor Unit GR79R5TBA disconnect power before checking, servicing GR99R5TBA WARNING GR129R5TBA and/or cleaning any electrical parts.

  • Page 37: Function

    7. FUNCTION 7-1. Room Temperature Control Cooling Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature 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 38 Heating Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature 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 39: Dry Operation

    7-2. 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 40: Freeze Prevention

    7-4. 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 41: Overload Prevention

    Outdoor fan Indoor fan H or M or L H, M M, L Compressor NOTE The operation temperature shown as A, B, C and D in the chart differ by models. MCAV77R5VAA MCAV97R5VAA MCAV127R5VAB 50°C 54°C 58°C 49°C 52°C 56°C 42°C 45°C...

  • Page 42: Cold Draft Prevention

    10 minutes has elapsed,the fan speed is automatically switched to set speed regardless of indoor heat exchange coil temperature. Indoor heat exch. coil temp. (°C) Max. 10minutes Indoor fan Set speed Standby lamp NOTE The operation temperature shown as Tc in the chart differ by models. MCAV77R5VAA MCAV97R5VAAMCAV127R5VAB 32°C 33°C 34°C...

  • Page 43: Defrosting Operation

    NOTE No LL fan operation during this period. Indoor fan runs at set speed NOTE when temperature of indoor heat exchanger reads Tc °C. The values shown as Ta, Tb and Tc differ according to the models. MCAV77R5VAA MCAV97R5VAA MCAV129R5VAB...
  • Page 44 Defrosting Mode Timing Chart Release of defrosting Start of defrosting 32 seconds 11 minutes 32 seconds Compressor Outdoor fan 2 seconds 2 seconds Solenoid coil (4 – way valve) Indoor fan Set speed Set speed Standby lamp Indoor heat exch. coil temp.

  • Page 45: Troubleshooting

    8. TROUBLESHOOTING 8-1. 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. 8-1-1. Check power supply wiring. Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the indoor unit.

  • Page 46: Air Conditioner Does Not Operate

    8-2. Air conditioner does not operate. 8-2-1. 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...
  • Page 47 B. Circuit breaker trips in several minutes after turning the air conditioner on. There is a possibility of short circuit. • Check capacity of circuit breaker. Replace with suitable one (larger capacity). Capacity of circuit breaker is suitable. In case of Heating operation : •...
  • Page 48 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 49 8-2-3. 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 50: Some Part Of Air Conditioner Does Not Operate

    8-3. Some part of air conditioner does not operate. 8-3-1. 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 51 8-3-4. Only compressor does not run. • Check compressor motor Internal protector (K) is working. capacitor. (C1) • Measure resistance of Temperature of compressor is abnormally high. compressor motor winding. Refrigerant gas shortage. Charge refrigerant gas (R22). • Measure Power supply Rotor may be locked up.

  • Page 52: Air Conditioner Operates, But Abnormalities Are Observed

    8-4. Air conditioner operates, but abnormalities are observed. 8-4-1. Operation does not switch from HEAT to COOL (or COOL to HEAT). • Remote control unit may be defective. Receiver in lamp Ass'y may be defective. • Measure resistance of 4–way valve's winding.
  • Page 53 8-4-2. 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 54: If A Sensor Is Defective

    8-5. If a sensor is defective. 8-5-1. Indoor coil temp. thermistor (TH1) is defective. • Operation lamp on front side of • Thermistor (TH1 ) is defective. indoor unit is flashing on and off. (*) • Replace thermistor. Alarm Signal (*) NOTE Operation lamp on the front side of the indoor unit will flash on and off when the indoor coil thermistor is defective.

  • Page 55: Checking Electrical Components

    9. CHECKING ELECTRICAL COMPONENTS power plug 9-1. Measurement of Insulation (Local supply) Resistance Ground The insulation is in good condition if the resistance exceeds 2MΩ. probe Insulation 9-1-1. Power Supply Wires tester NOTE Clamp the grounding terminal of the power plug with a lead clip of the insulation resistance tester and The shape of the power plug may differ from measure the resistance by placing a probe on either of...

  • Page 56: Checking Continuity Of Fuse On Pcb Ass'y

    9-2. Checking Continuity of Fuse Fuse on PCB Ass'y 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 Check for continuity using a multimeter as shown in Fig.

  • Page 57: Disassembly Procedure For Indoor Unit

    10. DISASSEMBLY PROCEDURE FOR INDOOR UNIT IMPORTANT! Please Read Before Starting Safety precautions for servicing the CEILING-MOUNTED indoor unit Before attempting to replace heavy and bulky parts such as the evaporator and fan motor, disconnect the indoor unit from the system and place it on the floor. Refer to the steps given below. When checking or servicing the air intake grille, side panels, or electrical component box, first check that power is completely disconnected.

  • Page 58: Removing Side Panels

    10-2. Removing Side Panels Hook (1) Remove the 3 screws attaching the left side panel. (Fig. 3) Slot (2) Note the position of the hook on the inside of the left side panel. To disengage the hook from the slot, Hook slide down the panel for removal.

  • Page 59: Removing Flap Motor

    10-4. Removing Flap Motor (1) Remove the 3 screws used to mount the top panel. Screw (Fig. 6) Top panel (2) While unlatching the 2 tabs inside the back of the top panel, lift the top panel diagonally in the direction of the arrow.(Fig.
  • Page 60 (3) Remove the 6 screws of the front panel and pull it toward you. (Fig. 9) (4) Remove the 2 screws used to mount the Screw evaporator. (Fig. 10) (5) Remove the rubber cap to pull the thermistor out of Front panel the evaporator.

  • Page 61: Removing Fan And Fan Motor

    10-6. Removing Fan and Fan Motor (1) Unlatch the 2 hooks on each side to take off the front fan casing. (Fig. 12) Hook Front fan casing Hook Fig.12 (2) Remove the 2 screws attaching the rear fan casing and then pull the fan casing out. Rear fan casing Fig.13 (3) Insert a hex wrench in the fan boss and turn it...
  • Page 62 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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