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Technibel MCAV180/220C5VAA Technical Data & Service Manual

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TECHNICAL DATA & SERVICE MANUAL
Indoor Unit
Outdoor Unit
MCAV180/220C5VAA
GRV180C7TAA
KPAV180/220C5TAA
GRV180L7TAA
GRV220C7TAA
GRV220L7TAA
SPLIT SYSTEM AIR CONDITIONER
GRV180C7TAA
GRV180L7TAA
KPAV180/220C5TAA
KP
GRV220C7TAA
GRV220L7TAA
MCAV180/220C5VAA
0.8180.147.1
04/2002

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Summary of Contents for Technibel MCAV180/220C5VAA

  • Page 1 TECHNICAL DATA & SERVICE MANUAL Indoor Unit Outdoor Unit MCAV180/220C5VAA GRV180C7TAA KPAV180/220C5TAA GRV180L7TAA GRV220C7TAA GRV220L7TAA SPLIT SYSTEM AIR CONDITIONER GRV180C7TAA GRV180L7TAA KPAV180/220C5TAA GRV220C7TAA GRV220L7TAA MCAV180/220C5VAA 0.8180.147.1 04/2002...

  • Page 2: Please Read Before Starting

    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 OPERATING RANGE SPECIFICATIONS 2-1 Unit Specification 2-2 Major Components Specifications 2-3 Other Component Specifications DIMENSIONAL DATA REFRIGERANT FLOW DIAGRAM PERFORMANCE DATA 5-1 Air Throw Distance Chart 5-2 Cooling Capacity ELECTRICAL DATA 6-1 Electrical Characteristic 6-2 Electric Wiring Diagrams INSTALLATION INSTRUCTION 7-1 Installation Site Selection 7-2 Remote Control Unit Installation P osition...
  • Page 4 11-3 Checking Motor Capacitor 12 DISASSEMBLY PROCEDURE FOR INDOOR UNIT 12-1 Removing air intake grille 12-2 Removing side panels 12-3 Access and removal of electrical component box 12-4 Removing flap motor 12-5 Removing evaporator 12-6 Removing fan and fan motor...

  • 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.(*) (*) L Models : -15°C D.B.

  • Page 6: Specifications

    2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit MCAV180C5VAA Outdoor Unit GRV180C7TAA Power Surce..Voltage Rating 400V - 3N - 50Hz ..400 V Control Circuit 230 V 50 Hz Cooling Capacity BTU/h 17400 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input...
  • Page 7 Indoor Unit MCAV220C5TAA Outdoor Unit GRV220C7TAA Power Source..Voltage Rating 400V - 3N - 50Hz..400 V Control Circuit 230 V 50 Hz Cooling 6.15 Capacity BTU/h 21000 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input 2800...
  • Page 8 Indoor Unit MCAV180C5VAA Outdoor Unit GRV180L7TAA Power Source..Voltage Rating 400V - 3N - 50Hz ..400 V Control Circuit 230 V 50 Hz Cooling Capacity BTU/h 17100 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input 2000...
  • Page 9 Indoor Unit MCAV220C5VAA Outdoor Unit GRV220L7TAA Power Source..Voltage Rating 400V - 3N - 50Hz..400 V Control Circuit 230 V 50 Hz Cooling 6.15 Capacity BTU/h 21000 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input 2800...
  • Page 10 Indoor Unit KPAV180C5VAA Outdoor Unit GRV180C7TAA Power Surce..Voltage Rating 400V - 3N - 50Hz ..400 V Control Circuit 230 V 50Hz Cooling Capacity BTU/h 17100 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input 2000 Power factor...
  • Page 11 Indoor Unit KPAV220C5VAA Outdoor Unit GRV220C7TAA Power Surce..Voltage Rating 400V - 3N - 50Hz ..400 V Control Circuit 230 50Hz Cooling 6.15 Capacity BTU/h 21000 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input 2800 Power factor...
  • Page 12 Indoor Unit KPAV180C5VAA Outdoor Unit GRV180L7TAA Power Surce..Voltage Rating 400V - 3N - 50Hz ..400 V Control Circuit 230 V 50Hz Cooling Capacity BTU/h 17100 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input 2000 Power factor...
  • Page 13 Indoor Unit KPAV220C5VAA Outdoor Unit GRV220L7TAA Power Source..Voltage Rating 400V - 3N - 50Hz ..400 V Control Circuit 230 50Hz Cooling 6.15 Capacity BTU/h 21000 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 342 to 418 Running amperes Power input 2800 Power factor...

  • Page 14: Major Components Specifications

    2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit MCAV180C5VAA Part No. POW – K188E Controls Microprocessor Control circuit fuse 250 V – 3.15 A Remote Control Unit RCS – 8PS3E Type Cross-flow Q´ty ... Dia. and length 1 ... ø88 / L746 Fan motor model ...
  • Page 15 Indoor Unit MCAV220C5VAA Part No. POW – K228E Controls Microprocessor Control circuit fuse 250 V – 3.15 A Remote Control Unit RCS – 8PS3E Type Cross-flow Q´ty ... Dia. and length 1 ... ø88 / L746 Fan motor model ... Q´ty UF2–...
  • Page 16 Indoor Unit KPAV180C5VAA Part No. POW–K185GS–N Controls Microprocessor Control circuit fuse 250 V – 3 A Remote Control Unit RCS – 5PN3E Type Centrifugal Number ... Dia. and length 2 ... ø 130 / L 180 Fan motor model ... Number K48410–M01417 ...
  • Page 17 Indoor Unit KPAV220C5VAA Part No. POW–K185GS–N Controls Microprocessor Control circuit fuse 250 V – 3 A Remote Control Unit RCS – 5PN3E Type Centrifugal Number ... Dia. and length 2 ... ø 130 / L 180 Fan motor model ... Number K48410–M01418 ...
  • Page 18 2-2-2. Outdoor Unit Outdoor Unit GRV180C7TAA / GRV180L7TAA Part No. POW-C181BL (Only CLR model) Controller Control circuit fuse 250V – 5A (Only CLR model) Type Rotary (Hermetic) Compressor model C-2RN173H8W 80807088 Source 380 – 400 V – 3N ~ 50 Hz Nominal output 1,700 Compressor oil ...
  • Page 19 Outdoor Unit GRV220C7TAA / GRV220L7TAA Part No. Johnson Control (Only CLR model) Controller Type Rotary (Hermetic) Compressor model C-RN223H8A 80244088B Source 380 – 400 V – 3N ~ 50 Hz Nominal output 2200 Compressor oil ... Amount FV68S ... 1350 Ω...

  • Page 20: Other Component Specifications

    2-3. Other Component Specifications Indoor Unit MCAV180C5VAA MCAV220C5VAA 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 21 Indoor Unit KPAV180C5VAA KPAV220C5VAA Thermistor (Room sensor TH2) KTEC-35-S6 Resistance kΩ 10°C 10.0 ± 4% 30°C 4.0 ± 4% 15°C 7.9 ± 4% 35°C 3.3 ± 4% 20°C 6.3 ± 4% 40°C 2.7 ± 4% 25°C 5.0 ± 4% 50°C 1.8 ± 4% Thermistor (Coil sensor TH1) PBC-41E-S14 Resistance...
  • Page 22 Outdoor Unit GRV180C7TAA Thermostat (Fann speed Control 23S) MQT5S-27YZJ Switching temp. °C high 23.5°C + 0 / - 2.5 HIGH 27 °C + 0 / - 3 AC 220V,3A Contact rating Negative Phase Relay (47C) RDR-S400 Rating AC 415V, 3-phase 50Hz Contact rating AC 400V, 1A Operation...
  • Page 23 Outdoor Unit GRV180L7TAA Thermistor (Coil sensor TH3 / Air sensor TH4) PBC-41E-S4 / PBC-41E-S8 Resistance kΩ –20°C 40.1 ± 5% 20°C 6.5 ± 5% –10°C 24.4 ± 5% 30°C 4.4 ± 5% 0°C 15.3 ± 5% 40°C 3.0 ± 5% 10°C 9.9 ±...
  • Page 24 Outdoor Unit GRV220C7TAA Electro Magnetic Contactor (MG) HE-10TB TH-7A Magnetic Contactor Coil rating AC 220–240V, 50Hz / AC 240–260V, 60Hz Ω (at 25°C) Coil resistance 1,260 ± 10% Contact rating (Main) AC 440V, 8A TH-7A Thermal relay (Overcurrent relay) Operating amperes Negative Phase Relay (47C) RDR-S400 Rating...
  • Page 25 Outdoor Unit GRV220L7TAA Electro Magnetic Contactor (MG) HE-10TB TH-7A Magnetic Contactor Coil rating AC 220–240V, 50Hz / AC 240–260V, 60Hz Ω (at 25°C) Coil resistance 1,260 ± 10% Contact rating (Main) AC 440V, 8A Thermal relay (Overcurrent relay) Operating amperes Negative Phase Relay (47C) RDR-S400 Rating...

  • Page 26: Dimensional Data

    3. DIMENSIONAL DATA Indoor Unit MCAV180C5VAA MCAV220C5VAA Remote control unit 18.5 147.5 147.5 Center of tubing hole (2 places) Drain hose ø18 Narrow tube ø6.35 (1/4") Wide tube ø12.7 (1/2") -------- - -KR188E Wide tube ø15.88 (5/8") KR228E Unit : mm...
  • Page 27 Indoor Unit KPAV180C5VAA KPAV220C5VAA Center of tubing hole ø75 (4 places) Wide tube ø12.7 (1/2") KPAV180C5VAA Wide tube ø15.88 (5/8") KPAV220C5VAA Narrow tube ø6.35 (1/4") Drain hose ø26 18.5 Dimensions : mm...
  • Page 28 Outdoor Unit GRV180C7TAA GRV180L7TAA Air intake 4 – ø12 holes Air discharge Wide tube service valve ø12.7 (1/2") Narrow tube service valve ø6.35 (1/4") Unit : mm...
  • Page 29 Outdoor Unit GRV220C7TAA GRV220L7TAA Air intake Air discharge Wide tube service valve ø15.88 (5/8") Narrow tube service valve ø6.35 (1/4") 6 – ø3.1 holes Check port ø6.35 (1/4") Unit : mm...

  • Page 30: Refrigerant Flow Diagram

    4. REFRIGERANT FLOW DIAGRAM Indoor Unit MCAV180C5VAA Outdoor Unit GRV180C7TAA KPAV180C5VAA Indoor Unit Outdoor Unit Outdoor Unit GRV220C7TAA Indoor Unit MCAV220C5VAA MCAV220C5VAA Indoor Unit Outdoor Unit Wide tube service Compressor Muffler Accumulator valve Wide tube O.D. Capillary for ø15.88 mm liquid injection (5/8 ") Narrow...

  • Page 31: Insulation Of Refrigerant Tubing

    Indoor Unit MCAV180C5VAA Outdoor Unit GRV180L7TAA KPAV180C5VAA Indoor Unit Outdoor Unit Muffler Outdoor Unit GRV220L7TAA Indoor Unit MCAV220C5VAA KPAV220C5VAA Indoor Unit Outdoor Unit Wide tube service Compressor Muffler Accumulator Wide tube valve O.D. Capillary for ø15.88 mm liquid injection (5/8 ") Narrow tube service...

  • Page 32: Performance Data

    5. PERFORMANCE DATA 5-1. Air Throw Distance Chart Indoor Unit MCAV180C5VAA 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 Indoor Unit MCAV220C5VAA...
  • Page 33 AIR FLOW CHART Indoor Unit KPAV180C5VAA Room air temp. : 27°C Fan speed High Floor mounted Axis air verocity Flap angle 60° 45° Horizontal distance (m) Ceiling mounted Horizontal distance (m) Axis air verocity Flap angle 30° 45°...
  • Page 34 Indoor Unit KPAV220C5VAA Room air temp. : 27°C Fan speed High Floor mounted Axis air verocity Flap angle 60° 45° Horizontal distance (m) Ceiling mounted Horizontal distance (m) Axis air verocity Flap angle 30° 45°...

  • Page 35: Cooling Capacity

    5-2. Cooling capacity INDOOR UNIT: MCAV180C5VAA OUTDOOR UNIT: GRV180C7TAA 400V 50 Hz RATING CAPACITY 5 kW AIR FLOW RATE 760 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 4,83 4,69 4,47 4,19 3,87 1,73 1,84 1,98 2,18 2,37 3,31 3,25...
  • Page 36 Indoor Unit MCAV180C5VAA Outdoor Unit GRV180L7TAA 400V 50 Hz RATING CAPACITY 5 kW AIR FLOW RATE 760 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 4.74 4.60 4.38 4.11 3.79 1.65 1.76 1.89 2.07 2.26 3.25 3.18 3.08 2.95 2.79...
  • Page 37 INDOOR UNIT: MCAV220C5VAA OUTDOOR UNIT: GRV220C7TAA / GRV220L7TAA 400V 50 Hz RATING CAPACITY 6,15 kW AIR FLOW RATE 830 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 5,83 5,66 5,39 5,05 4,67 2,30 2,46 2,65 2,90 3,16 4,00 3,92 3,78...
  • Page 38 INDOOR UNIT: KPAV180C5VAA OUTDOOR UNIT: GRV180C7TAA 400V 50 Hz RATING CAPACITY 5.1 kW AIR FLOW RATE 800 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 4,83 4,69 4,47 4,19 3,87 1,73 1,84 1,98 2,18 2,37 3,31 3,25 3,14 3,00 2,85...
  • Page 39 INDOOR UNIT: KPAV180C5VAA OUTDOOR UNIT: GRV180L7TAA 400V 50 Hz RATING CAPACITY 5 kW AIR FLOW RATE 800 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 4,74 4,60 4,38 4,11 3,79 1,65 1,76 1,89 2,07 2,26 3,25 3,18 3,08 2,95 2,79...
  • Page 40 INDOOR UNIT: KPAV220C5VAA OUTDOOR UNIT: GRV220C7TAA / GRV220L7TAA 400V 50 Hz RATING CAPACITY 6,15 kW AIR FLOW RATE 900 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 5,83 5,66 5,39 5,05 4,67 2,30 2,46 2,65 2,90 3,16 4,00 3,92 3,78...

  • Page 41: Electrical Data

    6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit MCAV180C5VAA Outdoor Unit GRV180C7VAA Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230 V 50 Hz 400 V - 3N - 50Hz Rating Conditions Running Amps. 0.30 0.40 3.17 Power Input...
  • Page 42 Indoor Unit MCAV180C5VAA Outdoor Unit GRV180L7TAA Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230 V 50 Hz 400 V - 3N - 50Hz Rating Conditions Running Amps. 0.37 0.50 2.97 Power Input 0,070 0,093 1,85 Full Load Conditions Running Amps.
  • Page 43 Indoor Unit KPAV180C5VAA Outdoor Unit GRV180C7TAA Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230 V ~ 50Hz 400 V – 3N ~ 50Hz Running Amps. 0.28 0.40 3.15 Rating Conditions Power Input 0.072 0.086 1.98 Running Amps.
  • Page 44 Indoor Unit KPAV180C5VAA Outdoor Unit GRV180L7TAA Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230 V ~ 50Hz 400 V – 3N ~ 50Hz Running Amps. 0.33 0.40 Rating Conditions Power Input 0.071 0.082 1.847 Running Amps.

  • Page 45: Electric Wiring Diagrams

    6-2 Electric Wiring Diagrams To avoid electrical shock hazard, be Indoor Unit KPAV180C5VAA sure to disconnect power before KPAV220C5VAA WARNING checking, servicing and/or cleaning any electrical parts...
  • Page 46 Indoor Unit MCAV180C5VAA MCAV220C5VAA...
  • Page 47 To avoid electrical shock hazard, be sure to disconnect power before WARNING checking, servicing and/or cleaning any electrical parts Outdoor Unit GRV180C7TAA GRV220C7TAA...
  • Page 48 To avoid electrical shock hazard, be sure to disconnect power before WARNING checking, servicing and/or cleaning any electrical parts Outdoor Unit GRV180L7TAA GRV220L7TAA...

  • Page 49: Installation Instruction

              7. INSTALLATION INSTRUCTIONS 7-1. Installation Site Selection Indoor Unit 15 cm min. 15 cm 15 cm min. To prevent abnormal heat min. INDOOR UNIT generation and the possibility WARNING of fire, don’t place obstacles, enclosures and grills in front Front View of or surrounding the air...
  • Page 50 Outdoor Unit AVOID: heat sources, exhaust fans, etc. (Fig. 3) Exhaust fan damp, humid or uneven locations. Hot air Heat source choose a place as cool as possible. Outdoor unit choose a place that is well ventilated. allow enough room around the unit for air intake/exhaust and possible maintenance.

  • Page 51: Remote Control Unit Installation Position

    7-2. Remote Control Unit Installation Removable mounting Position Wall The remote control unit can be operated from either a non-fixed position or a wall-mounted position. To ensure that the air conditioner operates correctly, do not install the remote control unit in the following places: Special mounting In direct sunlight...

  • Page 52: Recommended Wire Leng Th And Diameter

    7-3. Recommended Wire Length and Size Regulations on wiring diameter differ from locality to NOTE locality. For field wiring requirements, please refer to Refer to the WIRING SYSTEM DIAGRAM for the your local electrical codes. Carefully observe these meaning of "A" and "B" in Table 2. regulations when carrying out the installation.

  • Page 53: Function

    8. FUNCTION 8-1. Room Temperature Control 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 54: Dry Operation

    8-2. 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 55: Low Ambient Fan Speed Control

    8-4 LOW AMBIENT FAN SPEED CONTROL < FOR GRV180L7TAA > This function protects the compressor from being damaged due to flowback of the liquid refrigerant to the compressor when the outdoor temperature is very low. When the air temp. thermistor (TH4) on the outdoor units detects a change in temperature, the solid state relay (SSR) inside the electrical component box activates to control the fan speed accordingly.
  • Page 56 (FOR GRV220L7TAA) This function protects the compressor from being damaged due to flowback of the liquid refrigerant to the compressor when the outdoor temperature is very low. When the outdoor air tem. thermistor (TH4) on the outdoor unit detects a change in temperature,(below 28.5°C) the outdoor fan speed goes to low speed of the motor.

  • Page 57: Refrigerant R407C:special Precaution When Servicing Unit

    9. REFRIGERANT R407C : SPECIAL PRECAUTIONS WHEN SERVICING UNIT 9-1. Characteristics of new refrigerant R407C 9-1-1. What is new refrigerant R407C R407C is a new refrigerant that contains three types of non-azeotropy-type mixed refrigerant which does not adversely affect the Earth's ozone layer. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant R22 9-1-2.

  • Page 58: Tools Specifically For R407C

    9-3. Tools specifically for R407C For servicing, use the following tools for R407C Tool Distinction Tool Name • Gauge manifold • Charging hose • Gas leak detector • Refrigerant cylinder • Charging cylinder Tools specifically for R407C • Refrigerant recovery unit •...

  • Page 59: In Case Of Compressor Malfunction

    9-5. In case of compressor malfunction Should the compressor malfunction, be sure to replace compressor as quickly as CAUTION possible. Use only the tools indicated exclusively for R407C. See "10-3. Tools specifically for R407C". 9-5-1.Procedure for replacing compressor (1) Recovering refrigerant •...
  • Page 60 (5) Recharging Valve • Be sure to charge the specified amount of refrigerant in liquid state using the service port of wide tube service valve. The proper amount is listed on the unit's nameplate. When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation.

  • Page 61: In Case Refrigerant Is Leaking

    9-6. In case refrigerant is leaking Never attempt to charge additional refrigerant when refrigerant has been leaking CAUTION from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant. (1) Detecting Leaks •...
  • Page 62 (6) Recharging Valve • Be sure to charge the specified amount of refrigerant in liquid state using the service port of wide tube service valve. The proper amount is listed on the unit's nameplate. When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation.

  • Page 63: Charging Additional Refrigerant

    9-7. Charging additional refrigerant 9-7-1.When tubes are extended • Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit. Charge additional refrigerant in liquid state. Never charge additional refrigerant if refrigerant is leaking from the unit. Follow CAUTION instructions given in "10-6.

  • Page 64: 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 connected Outdoor Indoor to terminals L and N on the terminal plate in the...

  • Page 65: 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...
  • Page 66 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 remote control unit. Does not run.
  • Page 67 E. 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. (FMI ) for continuity. • Check operation lamp to see • Measure resistance of outdoor fan if light is ON.
  • Page 68 10-2-3. Only outdoor unit does not run. A. Check MODE selector switch of remote control unit. If it is set at FAN, • Check that MODE selector switch Set to "COOL". is not set at "FAN". NOTE Outdoor unit does not run when air conditioner is in following conditions. During thermo OFF (when the room temperature is below the set temperature).
  • Page 69 E. Check negative phase relay. Check negative phase relay to see • if it has operated. (47C) Rewire power supply wires. • F. Check magnetic contactor. Check coil resistance of magnetic • contactor. (MG) G. Check indoor PCB Ass'y. H. Check compressor motor protector. •...

  • Page 70: 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 71 Check transformer in outdoor unit. (GRV180L7TAA Only) • Measure resistance of primary and secondary winding. (TR2) Check fuse on outdoor PCB Ass'y. (GRV180L7TAA Only) Check fuse on outdoor PCB Ass’y • for continuity. If fuse blows, Measure resistance of primary •...
  • Page 72 10-3-3. Only compressor does not run. • Measure resistance of compressor motor winding. 10-3-4. Only flap motor does not run • Measure resistance of flap (FLP) motor winding. 10-3-5. Function of outdoor fan speed control does not work properly. ( For GRV180L7TAA) •...

  • Page 73: Poor Cooling

    10-4. Air conditioner operates, but abnormalities are observed. 10-4-1. Poor cooling. • Check position of remote control unit. Change position of remote • Cool air from air conditioner reaches control unit. position directly. • Wide and narrow tubes between Insulate both wide and narrow indoor unit and outdoor unit are tubes separately and then insulated.

  • Page 74: If A Sensor Is Defective

    10-5. If a sensor is defective. 10-5-1. Indoor coil temp. thermistor (TH1) is defective. A. Open When thermistor opens, the air conditioner will be in the following conditions as the controller tries to detect extremely low indoor coil temperature. In Cooling mode: Finction of freeze prevention continues to work. That is, the controller turns both compressor and outdoor fan motor periodically ON and OFF for several minutes.

  • Page 75: Checking Electrical Components

    11. CHECKING ELECTRICAL COMPONENTS 11-1. Measurement of Insulation Ground wire Resistance Clip The insulation is in good condition if the resistance exceeds 2MΩ. Probe 11-1-1. Power Supply Wires Insulation Fig. 1 tester Clamp the ground wire of the power supply wires with the lead clip of the insulation resistance tester and Terminal plate measure the resistance by placing a probe on either of...

  • Page 76: Check Continuity Of Fuse On Pcb Ass'y

    11-2. Checking Continuity of Fuse on PCB Ass'y Fuse 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 77: Disassembly Procedure For Indoor Unit

    12. 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 78: Removing Side Panels

    12-2. 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 79: Removing Flap Motor

    12-4. 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 80 (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 81: Removing Fan And Fan Motor

    12-6. 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 82 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:

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