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Technibel MCAV180R5VAA Technical Data & Service Manual

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TECHNICAL DATA & SERVICE MANUAL
Indoor Unit
Outdoor Unit
MCAV180/220R5VAA
GR180R5TAA
KPAV180/220R5VAA
GR220R5TAA
SPLIT SYSTEM AIR CONDITIONER
GR180R5TAA
KPAV180/220R5VAA
KP
GR220R5TAA
MCAV180/220R5VAA
0.8180.165.0
02/2001

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  • Page 1 TECHNICAL DATA & SERVICE MANUAL Indoor Unit Outdoor Unit MCAV180/220R5VAA GR180R5TAA KPAV180/220R5VAA GR220R5TAA SPLIT SYSTEM AIR CONDITIONER GR180R5TAA KPAV180/220R5VAA GR220R5TAA MCAV180/220R5VAA 0.8180.165.0 02/2001...
  • 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 OPERATING RANGE SPECIFICATIONS Unit Specification Major Component Specifications Other Component Specifications DIMENSIONAL DATA REFRIGERANT FLOW DIAGRAM PERFORMANCE DATA 5-1 Performance Charts 5-2 Air Throw Distance Chart 5-3 Cooling Capacity 5-4 Heating Capacity ELECTRICAL DATA 6-1 Electrical Characteristic 6-2 Electric Wiring Diagrams INSTALLATION INSTRUCTIONS 7-1 Installation Site Selection...
  • Page 4 CHECKING ELECTRICAL COMPONENTS 11-1 Measurements of insulation resistance 11-2 Checking continuity of fuse on PCB ass’y 11-3 Checking motor capacitor...

  • 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 MCAV180R5VAA Outdoor Unit GR180R5TAA Power Source 230 V Single phase 50Hz Voltage rating Cooling Heating 5.00 6.00 Capacity BTU/h 17100 20500 Air circulation (High) Moisture removal (High) Liters/h — Available voltage range 198 to 264 Running amperes 10.3...
  • Page 7 Indoor Unit MCAV220R5VAA Outdoor Unit GR220R5TAA Power Source 220 – 240 V Single phase 50Hz Voltage rating Cooling Heating 6.10 7.45 Capacity BTU/h 20800 25400 Air circulation (High) Moisture removal (High) Liters/h — Available voltage range 198 to 264 Running amperes 12.0 13.6 Power input...
  • Page 8 Indoor Unit KPAV180R5VAA Outdoor Unit GR180R5TAA Power Source 220 – 240 V ~ 50 Hz Voltage rating Cooling Heating Capacity BTU/h 17000 20500 Air circulation (High) Moisture removal (High) Liters/h — Available voltage range 198 to 264 Running amperes 10.3 Power input 2100 2150...
  • Page 9 Indoor Unit KPAV220R5VAA Outdoor Unit GR220R5TAA Power Source 220 – 240 V ~ 50 Hz Voltage rating Cooling Heating 6.10 7.45 Capacity BTU/h 20800 25400 Air circulation (High) Moisture removal (High) Liters/h Available voltage range 198 to 264 Running amperes 13.6 Power input 2650...

  • Page 10: Major Component Specifications

    2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit MCAV180R5VAA Part No. POW – K181GJH Controls Microprocessor Control circuit fuse 250 V – 3.15 A Remote Control Unit RCS – 8HPS3E Type Cross-flow Q´ty ... Dia. and length 1 ... ø88 / L746 Fan motor model ...
  • Page 11 Indoor Unit MCAV220R5VAA Part No. POW – K241GJH Controls Microprocessor Control circuit fuse 250 V – 3.15 A Remote Control Unit RCS – 8HPS3E Type Cross-flow Q´ty ... Dia. and length 1 ... ø88 / L746 Fan motor model ... Q´ty UF2–...
  • Page 12 Indoor Unit KPAV180R5VAA Part No. POW – K186GHS – (C) Controls Microprocessor Control circuit fuse 250 V – 3 A Remote Control Unit RCS – 6HPS3E Type Centrifugal Number ... Dia. and length 2 ... ø 130 / L 180 Fan motor model ...
  • Page 13 Indoor Unit KPAV220R5VAA Part No. POW – K186GHS– (C) Controls Microprocessor Control circuit fuse 250 V – 3 A Remote Control Unit RCS – 6HPS3E Type Centrifugal Number ... Dia. and length 2 ... ø 130 / L 180 Fan motor model ... Number K48410 –...
  • Page 14 Outdoor Unit GR180R5TAA Controller PCB POW – C186GH Type Rotary (Hermetic) Compressor model P H 3 6 V T R T Nominal output 1600 Compressor oil ... Amount DIAMOND MS32(N1)...900 Ω Coil resistance (Ambient temp. 20°C) C – R : 1.06 C –...
  • Page 15 Outdoor Unit GR220R5TAA Controller PCB POW – C226GH Type Rotary (Hermetic) Compressor model C – R221H5S 80687145B Nominal output 2,200 Compressor oil ... Amount 4GSD – T or SAY-56T ... 1,350 Ω Coil resistance (Ambient temp. 25°C) C – R : 0.78 C –...

  • Page 16: Other Component Specifications

    2-3. Other Component Specifications Indoor Unit MCAV180R5VAA MCAV220R5VAA Transformer (TR) ATR-J105 Rating Primary AC 230V, 50Hz Secondary 19V, 0.526A Capacity 10VA Ω (at 21°C) Coil resistance Primary (WHT – WHT): 205 ± 10% Secondary (BRN – BRN): 2.0 ± 10% Thermal cut-off temp.
  • Page 17 Outdoor Unit GR180R5TAA Power Relay (PR) DFU24D1-F Coil rating DC 24V Ω (at 20°C) Coil resistance 650 ± 10% Contact rating AC 250V, 20A Starting Relay (SR) AMVL300A Coil rating AC 300V, 50Hz Coil resistance kΩ (at 23°C) 13.3 ± 2% Contact rating 20A AC Operating voltage...
  • Page 18 Outdoor Unit GR220R5TAA Magnetic Contactor (MG) HE-20FT31B Coil rating AC 220/240 V,50Hz Ω (at 25°C) Coil resistance 1.050 ± 15% Contact rating (Main) AC 220V, 20A Thermostat (Defrost thermo. 23D) TRS02-12MSR316 Operating temp. °C 12 ± 2 Diff. 8 deg. below Thermostat (Fan Speed Control 23S) YTB-S383 high...

  • Page 19: Dimensional Data

    3. DIMENSIONAL DATA Indoor Unit MCAV180R5VAA MCAV220R5VAA 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") MCAV180 Wide tube ø15.88 (5/8") MCAV220 Unit : mm...
  • Page 20 Indoor Unit KPAV180R5VAA KPAV220R5VAA Center of tubing hole Remote control unit ø75 (4 places) Wide tube ø12.7 (1/2") KPAV180 Wide tube ø15.88 (5/8") KPAV220 Narrow tube ø6.35 (1/4") Drain hose ø26 18.5 Dimensions : mm...
  • Page 21 Outdoor Unit GR180R5TAA 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 22 Outdoor Unit : GR220R5TAA Air intake Air discharge Wide tube service valve ø15.88 (5/8") 6 – ø3.1 holes Narrow tube service valve ø6.35 (1/4") Unit : mm...

  • Page 23: Refrigerant Flow Diagram

    4. REFRIGERANT FLOW DIAGRAM Indoor Unit MCAV180R5VAA -KPAV180R5VAA Outdoor Unit GR180R5TAA...
  • Page 24 Indoor Unit MCAV220R5VAA - KPAV220R5VAA Outdoor Unit GR220R5TAA Indoor unit Outdoor unit Capillary for liquid injection Accumulator Wide tube service Wide tube valve 4-way valve O.D. ø15.88 mm (5/8 ") Accumulator Narrow tube Capillary tube service Narrow tube valve Cooling cycle Strainer Capillary tube Check...

  • Page 25: Performance Data

    5. PERFORMANCE DATA 5-1. Performance charts Indoor Unit MCAV180R5VAA KPAV180R5VAA Outdoor Unit GR180R5TAA Cooling Characteristics Heating Characteristics Indoor inlet air Indoor inlet air D.B. temp. (°C) D.B. temp. (°C) Outdoor fan speed High –5 Outdoor inlet air D.B. temp. (°C) Outdoor inlet air D.B.
  • Page 26 Indoor Unit MCAV220R5VAA KPAV220R5VAA Outdoor Unit GR220R5TAA Cooling Characteristics Heating Characteristics Indoor inlet air Indoor inlet air D.B. temp. (°C) D.B. temp. (°C) Outdoor fan speed High –5 Outdoor inlet air D.B. temp. (°C) Outdoor inlet air D.B. temp. (°C) Indoor inlet air Indoor inlet air 1.38 (13)

  • Page 27: Air Throw Distance Chart

    5-2. Air Throw Distance Chart Indoor Unit MCAV180R5VAA 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 28 Indoor Unit MCAV220R5VAA 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)
  • Page 29 Indoor Unit KPAV180R5VAA Floor mounted Cooling Room air temp. : 27°C Fan speed High Axis air verocity Flap angle 60° 45° Horizontal distance (m) Heating Room air temp. : 20°C Fan speed High Axis air verocity Flap angle 0° –20° Horizontal distance (m)
  • Page 30 Indoor Unit KPAV180R5VAA 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 31 Indoor Unit KPAV220R5VAA Floor mounted Cooling Room air temp. : 27°C Fan speed High Axis air verocity Flap angle 60° 45° Horizontal distance (m) Heating Room air temp. : 20°C Fan speed High Axis air verocity Flap angle 0° –20° Horizontal distance (m)
  • Page 32 Indoor Unit KPAV220R5VAA 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 33: Cooling Capacity

    5-3. Cooling Capacity Indoor Unit MCAV180R5VAA Outdoor Unit GR180R5TAA 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 1.73 1.84 1.98 2.18 2.37 3.25 3.18 3.08...
  • Page 34 Indoor Unit MCAV220R5VAA Outdoor Unit GR220R5TAA RATING CAPACITY 6.1 kW AIR FLOW RATE 830 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 5.78 5.61 5.34 5.01 4.63 2.18 2.33 2.50 2.75 2.99 3.96 3.89 3.75 3.59 3.41 4.49 4.40 4.27...
  • Page 35 Indoor Unit KPAV180R5VAA Outdoor Unit GR180R5TAA 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 1.73 1.84 1.98 2.18 2.37 3.25 3.18 3.08 2.95 2.79 3.68 3.61 3.50...
  • Page 36 Indoor Unit KPAV220R5VAA Outdoor Unit GR220R5TAA RATING CAPACITY 6.1 kW AIR FLOW RATE 900 m³/h EVAPORATOR CONDENSER ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C W.B. D.B. 5.78 5.61 5.34 5.01 4.63 2.18 2.33 2.50 2.75 2.99 3.96 3.89 3.75 3.59 3.41 4.49 4.40 4.27...

  • Page 37: Heating Capacity

    5-4. Heating Capacity Indoor Unit MCAV180R5VAA MCAV220R5VAA KPAV180R5VAA KPAV220R5VAA Outdoor Unit GR180R5TAA GR220R5TAA –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 38: Electrical Data

    6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit MCAV180R5VAA Outdoor Unit GR180R5TAA COOLING Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating Conditions Running Amps. 0.38 0.50 8.92 Power Input 0.072 0.093...
  • Page 39 Indoor Unit MCAV220R5VAA Outdoor Unit GR220R5TAA COOLING Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating Conditions Running Amps. 0.40 0.55 11.05 12.0 Power Input 0.078 0.120 2.452 2.65 Full Load Conditions Running Amps. 0.40 0.55 14.25...
  • Page 40 Indoor Unit KPAV180R5VAA Outdoor Unit GR180R5TAA Cooling 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 9.07 Rating Conditions Power Input 0.071 0.082 1.947 2.10...
  • Page 41 Indoor Unit KPAV220R5VAA Outdoor Unit GR220R5TAA Cooling Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230 V ~ 50Hz 400 V – 3N ~ 50Hz Running Amps. 0.40 0.54 3.96 Rating Conditions Power Input 0.083 0.116 2.45 2.65...

  • Page 42: Electric Wiring Diagrams

    6-2 Electric Wiring Diagrams To avoid electrical shock hazard, be sure to disconnect power before Indoor Unit MCAV180R5VAA WARNING checking, servicing and/or cleaning MCAV220R5VAA any electrical parts...
  • Page 43 Indoor unit KPAV180R5VAA To avoid electrical shock hazard, be sure to FCRG disconnect power before checking, servicing KPAV220R5VAA WARNING and/or cleaning any electrical parts.
  • Page 44 Outdoor Unit GR220R5TAA...
  • Page 45 Outdoor unit GR180R5TAA...

  • Page 46: Installation Instructions

    Length (L) Difference (H) Additional Refrigerant Shipment (m) (g / m)* MCAV180R5VAA MCAV220R5VAA * If total tubing length becomes 7.5 to 20 m (max.), charge additional refrigerant (R22) by 25 g / m. No additional charge of compressor oil is necessary.
  • Page 47 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 48: 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 49: Recommended Wire Length 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", "B" and "C" in Table 2. regulations when carrying out the installation.

  • Page 50: Disassembly Procedure For Indoor Unit

    8. 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 51: Removing Side Panels

    8-2. 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 52: Removing Flap Motor

    8-4. 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 53 (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 54: Removing Fan And Fan Motor

    8-6. 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 55: 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 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 56 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 57: 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 58: Freeze Prevention

    9-4. 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 59: Cold Draft Prevention

    9-6. 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 this function is working. when 10 minutes has elapsed,the fan speed is automatically switched to set speed regardless of indoor heat exchange coil temperature.

  • Page 60: Defrosting Operation

    9-7. Defrosting Operation (Heating) Defrosting Flowchart Compressor ON Release of overload prevention (Outdoor fan operates.) Overload prevention works. Does outdoor fan stop? Outdoor fan is either operated Indoor heat exchanger coil Integrated operating time of Integrated operating time of or stopped for more than 10 temperature drops 0.8°C per compressor is more than 3 compressor is more than 1.5...
  • Page 61 Defrosting Mode Timing Chart Release of defrosting Start of defrosting 32 seconds Max. 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.

  • Page 62: Outdoor Fan Speed Control

    9-8. Outdoor Fan Speed Control (Cooling and Dry Operation) To optimize performance of the air conditioner, the outdoor fan speed is switched automatically according to the outdoor temperature. If the outdoor air temperature falls below A°C, the fan speed switches to LOW. If the outdoor air temperature rises above B°C, the fan speed switches to HIGH.

  • Page 63: 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 to terminals L and N on the terminal plate in the outdoor unit.

  • Page 64: 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 65 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 : Measure resistance of outdoor fan •...
  • Page 66 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 67 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 ( button).

  • Page 68: Some Parts 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 69 10-3-4. Only outdoor 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. Fan motor burnout or foreign matter in Repair or replace.

  • Page 70: 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 lamp Ass'y may be defective. • Measure resistance of 4–way valve's winding.
  • Page 71 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 72: 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. (*) • 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 73: Measurements Of Insulation Resistance

    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 tester Fig. 1 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 74: Checking 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 75 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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