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Techibel MCAF94R5IAA Technical & Service Manual

Dc inverter split system air conditioner
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TECHNICAL
& SERVICE MANUAL
MCAF94R5IAA
MCAF124R5IAA + GRF127R5I
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Model No.
MCAF94R5IAA
MCAF124R5IAA
Indoor Unit
MCAF94R5IAA
MCAF124R5IAA
RoHS
This product does not contain any hazardous substances prohibited by the RoHS Directive.
•
WARNING
• You are requested to use RoHS compliant parts for maintenance or repair.
• You are requested to use lead-free solder.
+ GRF97R5I
Product Code No.
3 871 300 03
(1 852 345 22)
3 871 300 04
(1 852 345 23)
These air conditioners employ new refrigerant R410A.
Pay special attention when servicing the unit.
FILE NO.
Outdoor Model No.
GRF97R5I
GRF97R5IAA
GRF127R5I
GRF127R5IAA
Outdoor Unit
GRF97R5I
GRF127R5I
REFERENCE NO.
Destination: Europe
Product Code No.
(1 852 345 25)
(1 852 345 26)
SM
700725

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  • Page 1 TECHNICAL & SERVICE MANUAL MCAF94R5IAA + GRF97R5I MCAF124R5IAA + GRF127R5I FILE NO. Destination: Europe DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Model No. Product Code No. Outdoor Model No. Product Code No. MCAF94R5IAA 3 871 300 03 (1 852 345 22)

  • Page 2: Special Precautions

    When Transporting Important! Please Read Before Starting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or This air conditioning system meets strict safety and thin aluminum fins on the air conditioner can cut your operating standards.

  • Page 3: Table Of Contents

    Table of Contents Page 1. OPERATING RANGE ........................2. SPECIFICATIONS 2-1. Unit Specifications ......................2-2. Major Component Specifications ..................2-3. Other Component Specifications ..................3. DIMENSIONAL DATA ........................4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram ....................5. PERFORMANCE DATA 5-1.
  • Page 4 Page 10. TROUBLESHOOTING 10-1. Precautions before Performing Inspection or Repair ............10-2. Method of Self-Diagnostics ....................10-3. Checking the Indoor and Outdoor Units ................10-4. Trouble Diagnosis of Fan Motor ................... 10-5. Noise Malfunction and Electromagnetic Interference ............11. CHECKING ELECTRICAL COMPONENTS 11-1.

  • Page 5: Operating Range

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

  • Page 6: Specifications

    2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I Power Source 220 to 240V Single-Phase 50Hz Voltage Rating 230V Performance Cooling Heating Capacity 2.65 ( 0.9 to 3.2 ) 3.60 ( 0.9 to 5.0 ) BTU/h 9,000 ( 3,100 to 10,900 )
  • Page 7 Indoor Unit MCAF124R5IAA Outdoor Unit GRF127R5I Power Source 220 to 240V Single-Phase 50Hz Voltage Rating 230V Performance Cooling Heating Capacity 3.50 ( 0.9 to 3.8 ) 4.20 ( 0.9 to 5.8 ) BTU/h 11,900 ( 3,100 to 13,000 ) 14,300 ( 3,100 to 19,800 ) Air Circulation (High) Moisture Removal (High)

  • Page 8: Major Component Specifications

    2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit MCAF94R5IAA Control PCB Part No. CB-KRV93EH Controls Microprocessor Control Circuit Fuse 250V 3.15A Remote Control Unit RCS-3HVPSN4E Type Cross-Flow Q'ty ... Dia. and Length 1 ... D92 / L634 Fan Motor...
  • Page 9 Indoor Unit MCAF124R5IAA Control PCB Part No. CB-KRV123EH Controls Microprocessor Control Circuit Fuse 250V 3.15A Remote Control Unit RCS-3HVPSN4E Type Cross-Flow Q'ty ... Dia. and Length 1 ... D92 / L634 Fan Motor Type AC Motor Model ... Q'ty IBH-884-066 ... 1 No.

  • Page 10: Outdoor Unit

    2-2-2. Outdoor Unit Outdoor Unit GRF97R5I Control PCB Part No. CB-CRV93EH Controls Microprocessor Control Circuit Fuse 250V 20A Compressor Type Single Rotary (Hermetic) Compressor Model / Nominal Output G4C090LU1ER / 600W Compressor Oil ... Amount FV50S ... 320 Coil Resistance (Ambient Temp. 20 °C) U - V : 0.81 V - W : 0.81 W - U : 0.81...
  • Page 11 Outdoor Unit GRF127R5I Control PCB Part No. CB-CRV123EH Controls Microprocessor Control Circuit Fuse 250V 20A Compressor Type Single Rotary (Hermetic) Compressor Model / Nominal Output G4C090LU1ER / 600W Compressor Oil ... Amount FV50S ... 320 Coil Resistance (Ambient Temp. 20 °C) U - V : 0.81 V - W : 0.81 W - U : 0.81...

  • Page 12: Other Component Specifications

    2-3. Other Component Specifications Indoor Unit MCAF94R5IAA MCAF124R5IAA Outdoor Unit GRF97R5I GRF127R5I • Indoor heat exchanger sensor (Model:PTM-D51H-S3-2 TH1) • Indoor air temp sensor • Compressor temp sensor (Model:PTM-D51H-S3-2 TH2) (Model:1FA4V2E025900) 10 20 30 40 50 60 70 80 90 Temperature (°C)

  • Page 13: Dimensional Data

    3. DIMENSIONAL DATA Indoor Unit MCAF94R5IAA MCAF124R5IAA Unit: mm...
  • Page 14 Outdoor Unit GRF97R5I GRF127R5I AIR INTAKE AIR DISCHARGE 2-dia.12 holes Wide tube service valve dia.9.52 (3/8") Narrow tube service valve dia.6.35 (1/4") Unit: mm...

  • Page 15: Refrigerant Flow Diagram

    4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I Indoor unit Outdoor unit Accumulator Wide tube service Wide tube valve 4-way Muffler valve O.D. 9.52mm (3/8") Capillary tube for Electric split flow Narrow expansion tube...

  • Page 16: Performance Data

    5. PERFORMANCE DATA 5-1. Temperature Charts Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I Cooling Characteristics Heating Characteristics (34.7) (12.2) (29.6) (11.2) (24.5) (10.2) (19.4) (9.2) –5 Outdoor inlet air D.B. temp.(˚C) Outdoor inlet air D.B. temp.(˚C) –5 Outdoor inlet air D.B. temp.(˚C) Outdoor inlet air D.B.
  • Page 17 Indoor Unit MCAF124R5IAA Outdoor Unit GRF127R5I Cooling Characteristics Heating Characteristics Outdoor fan speed (12.2) High (34.7) (11.2) (29.6) (10.2) (24.5) (9.2) (19.4) –5 Outdoor inlet air D.B. temp.(˚C) Outdoor inlet air D.B. temp.(˚C) Outdoor fan speed High –5 Outdoor inlet air D.B. temp.(˚C) Outdoor inlet air D.B.

  • Page 18: Air Throw Distance Charts

    5-2. Air Throw Distance Charts Indoor Unit MCAF94R5IAA Cooling 27 °C Room air temp. : Fan speed High Horizontal distance (m) : Flap angle 0°, : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30° Heating 20 °C...
  • Page 19 Indoor Unit MCAF124R5IAA Cooling 27 °C Room air temp. : Fan speed High Horizontal distance (m) : Flap angle 0°, : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30° Heating 20 °C Room air temp. : Fan speed High Horizontal distance (m)

  • Page 20: Electrical Data

    6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I Cooling Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor + Compressor Performance at 230V Single-phase 50Hz Rating conditions Running amp. 0.17 3.69 3.86 Power input 27 °C D.B. / 19 °C W.B.

  • Page 21: Electric Wiring Diagrams

    6-2. Electric Wiring Diagrams Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts.
  • Page 22 Indoor Unit MCAF124R5IAA Outdoor Unit GRF127R5I To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts.

  • Page 23: Installation Instructions

    7. INSTALLATION INSTRUCTIONS 7-1. Installation Site Selection 7-1-1. Indoor Unit To prevent abnormal heat WARNING generation and the possibility of fire, do not place obstacles, 15 cm min. 5 cm enclosures and grilles in front 5 cm min. min. of or surrounding the air conditioner in a way that may block air flow.
  • Page 24 7-1-2. Outdoor Unit Exhaust fan AVOID: Hot air Heat source heat sources, exhaust fans, etc. (Fig. 4) damp, humid or uneven locations. Outdoor unit choose a place as cool as possible. choose a place that is well ventilated. allow enough room around the unit for air intake/ Fig.

  • Page 25: Recommended Wire Length And Diameter

    7-2. Recommended Wire Length and Diameter Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation. Table 2 lists recommended wire lengths and diameters for power supply systems. NOTE Refer to the wiring system diagram (Fig.

  • Page 26: Remote Control Unit Installation Position

    7-3. Remote Control Unit Installation Position 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: In direct sunlight Behind a curtain or other place where it is covered More than 8 m away from the air conditioner...

  • Page 27: How To Test Run The Air Conditioner

    7-4. How to Test Run the Air Conditioner After turning on power to the air conditioner, use the remote controller and follow the steps below to conduct the test run. (1) Set the remote controller in Test Run mode. (Fig. 8a) a) Press and hold the QUIET button.

  • Page 28: Remove The Grille To Install The Indoor Unit

    Grille Air intake grille 7-5. Remove the Grille to Install the Indoor Unit Basically, these models can be installed and wired without removing the grille. If access to any internal part is needed, follow the steps as given below. Fig. 9a Be sure to wear work gloves CAUTION during installation to avoid being...

  • Page 29: Maintenance

    8. MAINTENANCE 8-1. Address Setting of the Remote Control Unit The address can be set in order to prevent interference between remote controllers when two indoor units are installed near each other. The address is normally set to "A." To set a different address, it is necessary to change the address on the Fig.

  • Page 30: Disconnecting And Connecting Positive Connector For Outdoor Unit

    8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit One of the two types of connectors illustrated at left is used. Their basic structure is the same for each. How to Disconnect Hold the resin connector cover, and pull the connector off. You cannot disconnect the connector by pulling the wire since it is locked inside.

  • Page 31: Functions

    9. FUNCTIONS 9-1. Operation Functions Emergency operation SENSOR DRY Emergency operation is available when the remote During DRY operation, the system adjusts the room temperature and fan speed according to the conditions in the controller malfunctions, has been lost, or otherwise room, in order to maintain a comfortable room environment.

  • Page 32: Night Setback

    HIGH POWER NIGHT SETBACK This function acts to raise the power but keeps the AC system in • When NIGHT SETBACK operation is set, the temperature and the same operating mode. fan speed settings will be adjusted automatically to allow This function is set with the HIGH POWER button on the remote comfortable sleep.

  • Page 33: Protective Functions

    9-2. Protective Functions Overload prevention during heating Cold-air prevention during heating During HEAT operation, the temperature of the indoor heat During heating, the fan speed is set to "LL" (very low) or stopped. exchanger is used to control the frequency and lessen the load As the temperature of the indoor heat exchanger rises, the fan on the compressor before the protective device is activated.

  • Page 34: Defrost Detection And Release

    Defrost detection and release CT (Peak current cut-off control) • This function prevents the circuit breaker or fuse from operating Reverse-Cycle Defrosting to open the circuit. This function works when electrical current has increased due to an increase in the cooling / heating load, or to a decrease in the power supply voltage.

  • Page 35: Troubleshooting

    10. TROUBLESHOOTING 10-1. Precautions before Performing Inspection or Repair After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair. High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge (charging voltage DC 310V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be careful not to touch any electrified parts before the controller LED (red) turns OFF.

  • Page 36: Indoor Unit

    (1) Self-diagnostics Lamps INDOOR UNIT (1) OPERATION lamp (2) TIMER lamp (3) QUIET lamp OPERATION button REMOTE CONTROL receiver • Since the indications cover various units, the corresponding parts listed below may not be present in some models..OFF ..

  • Page 37: Checking The Indoor And Outdoor Units

    (2) If the self-diagnostics function fails to operate • No indicators illuminate and the Check the indoor unit. indoor fan does not rotate. • Check the power voltage. Blown Is the fuse blown? Normal Replace the circuit board or the fuse. Replace the controller.

  • Page 38: Trouble Diagnosis Of Fan Motor

    10-4. Trouble Diagnosis of Fan Motor 10-4-1. Outdoor Fan Motor (Only for GRF127R5I) This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. Perform the trouble diagnosis by Test Run mode described on Installation Instructions.

  • Page 39: Noise Malfunction And Electromagnetic Interference

    10-5. Noise Malfunction and Electromagnetic Interference An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices. A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these effects may still occur.

  • Page 40: 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 1M ohm. Probe 11-1-1. Power Supply Cord Insulation Clamp the grounding wire of power cord with the lead tester clip of the insulation resistance tester and measure the Fig.

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

    11-2. 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) Check for continuity using a multimeter as shown in PCB Ass'y Fig.

  • Page 42: Refrigerant R410A: Special Precautions When Servicing Unit

    12. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 12-1. Characteristics of New Refrigerant R410A 12-1-1. What is New Refrigerant R410A? R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22. 12-1-2.
  • Page 43 Tubing precautions Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation. Never use 0.7mm-thick copper tubing or tubing which is less than 0.8mm in thickness, since air conditioners with R410A are subject to higher pressure than those using R22 and R407C.

  • Page 44: Tools Specifically For R410A

    12-3. Tools Specifically for R410A For servicing, use the following tools for R410A Tool Distinction Tool Name Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Refrigerant recovery unit Vacuum pump with anti-reverse flow (*1) Tools specifically for R410A (Solenoid valve-installed type, which prevents oil from flowing back into the unit when the power is off, is recommended.) Vacuum pump (*2)...can be used if the following adapter is attached.

  • Page 45: In Case Of Compressor Malfunction

    12-5. In Case of Compressor Malfunction Should the compressor malfunction, be sure to make the switch to a replacement CAUTION compressor as quickly as possible. Use only the tools indicated exclusively for R410A. See "12-3. Tools Specifically for R410A." 12-5-1. Procedure for Replacing Compressor (1) Recovering refrigerant Any remaining refrigerant inside the unit should not be released to the atmosphere, but recovered using the...
  • Page 46 (5) Recharging Configuration and characteristics of cylinders Be sure to charge the specified amount of Valve refrigerant in liquid state using the service port of the 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 47: In Case Refrigerant Is Leaking

    12-6. 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 Use the detector for R410A to locate refrigerant leak points.

  • Page 48: Charging Additional Refrigerant

    12-7. Charging Additional Refrigerant 12-7-1. 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 only. Never charge additional refrigerant if refrigerant is leaking from the unit. Follow CAUTION instructions given in "12-6.

  • Page 49: Appendix

    APPENDIX Remote Control Unit Sensor Transmitter Display (Cover closed) ON/OFF operation button QUIET button 1 HR. TIMER button Temperature setting buttons (TEMP.) MODE Selector button FAN SPEED selector button NIGHT SETBACK button FLAP button HIGH POWER button ON TIME Advance button OFF TIME Advance button setting...
  • Page 50 R.D. 28 Reyrieux BP 131 - 01601 Trevoux CEDEX France Tel. (33) 04.74.00.92.92 - Fax (33) 04.74.00.42.00 http://www.technibel.com...

This manual is also suitable for:

Grf97r5iMcaf124r5iaaGrf127r5i

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