Technibel GRV121L5VAA Technical Data & Service Manual Download Page 1

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TECHNICAL DATA & SERVICE MANUAL

MCAV77C5VAB + GRV71L5VAA
MCAV97C5VAB + GRV91L5VAA
MCAV127C5VAB

+ GRV121L5VAA

Indoor Unit

Outdoor Unit

SPLIT SYSTEM AIR CONDITIONER

MCAV77C5VAB
MCAV97C5VAB
MCAV127C5VAB

GRV71L5VAA
GRV91L5VAA
GRV121L5VAA

KPAV128C5TAA

Ceiling-Mounted

Floor-Mounted

KPAV128C5TAA

KPAV128C5TAA + GRV121L5VAA

0.8180.157.0 02/2001

Summary of Contents for GRV121L5VAA

Page 1: ...GRV91L5VAA MCAV127C5VAB GRV121L5VAA Indoor Unit Outdoor Unit SPLIT SYSTEM AIR CONDITIONER MCAV77C5VAB MCAV97C5VAB MCAV127C5VAB GRV71L5VAA GRV91L5VAA GRV121L5VAA KPAV128C5TAA Ceiling Mounted Floor Mou...

Page 2: ...WARNING When Transporting 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 thin al...

Page 3: ...FUNCTION 8 1 Room Temperature Control 39 8 2 Dry Operation 40 8 3 Freeze prevention 41 8 4 Outdoor fan speed control 42 9 REFRIGERANT R407C SPECIAL PRECAUTION WHEN SERVICING UNIT 9 1 Characteristics o...

Page 4: ...y 60 11 3 Checking motor capacitor 60 12 DISASSEMBLY PROCEDURE FOR INDOOR UNIT 12 1 Removing air intake grille 61 12 2 Removing side panels 62 12 3 Access and removal of electrical components box 62...

Page 5: ...1 1 OPERATING RANGE Temperature Indoor Air Intake Temp Outdoor Air Intake Temp Cooling Maximum 32 C D B 23 C W B 43 C D B Minimum 19 C D B 14 C W B 15 C D B...

Page 6: ...Vertical Auto Air filter Washable Anti Mold Compressor Rotary Hermetic Refrigerant Amount charged at shipment g R407c 730 Refrigerant control Capillary tube Operation sound Indoor Hi Me Lo dB A 37 32...

Page 7: ...ter Washable Anti Mold Compressor Rotary Hermetic Refrigerant Amount charged at shipment g R407c 800 Refrigerant control Capillary tube Operation sound Indoor Hi Me Lo dB A 37 32 31 Outdoor Hi dB A 43...

Page 8: ...ilter Washable Anti Mold Compressor Rotary Hermetic Refrigerant Amount charged at shipment g R407c 750 Refrigerant control Capillary tube Operation sound Indoor Hi Me Lo dB A 39 35 33 Outdoor Hi dB A...

Page 9: ...filter Washable Anti Mold Compressor Rotary Hermetic Refrigerant Amount charged at shipment g R407c 750 Refrigerant control Capillary tube Operation sound Indoor Hi Me Lo dB A 39 35 33 Outdoor Hi dB A...

Page 10: ...of poles rpm 230 V High 4 1 130 Nominal output W 10 Coil resistance Ambient temp 20 C BRN WHT 561 8 VLT WHT 197 4 VLT ORG 63 4 YEL ORG 155 7 YEL PNK 115 9 Safety devices Type Internal fuse Operating...

Page 11: ...1 190 Nominal output W 10 Coil resistance Ambient temp 20 C BRN WHT 561 8 VLT WHT 197 4 VLT ORG 63 4 YEL ORG 155 7 YEL PNK 115 9 Safety devices Type Internal fuse Operating temp Open C 145 2 Close Run...

Page 12: ...1 230 Nominal output W 10 Coil resistance Ambient temp 20 C BRN WHT 561 8 VLT WHT 197 4 VLT ORG 63 4 YEL ORG 155 7 YEL PNK 115 9 Safety devices Type Internal fuse Operating temp Open C 145 2 Close Ru...

Page 13: ...20 Coil resistance Ambient temp 20 C GRY WHT 311 7 WHT VLT 97 6 7 VLT YEL 97 6 7 WHT PNK 425 7 Safety devices Type Internal protector Operating temp Open C 145 5 Close Automatic reclosing Run capacit...

Page 14: ...temp 25 C Trip in 6 to 16 sec at 13A Run capacitor F 17 5 VAC 450 Crank case heater Fan Fan Motor Type Propeller Q ty Dia 1 370 Fan motor model Q ty KR35410M01846 1 No of poles rpm 230 V High 6 770 No...

Page 15: ...Trip in 6 to 16 sec at 16A Run capacitor F 22 5 VAC 450 Crank case heater Fan Fan Motor Type Propeller Q ty Dia 1 370 Fan motor model Q ty KR35410M01846 1 No of poles rpm 230 V High 6 800 Nominal out...

Page 16: ...perating amp Ambient temp 25 C Trip in 6 to 16 sec at 21A Run capacitor F 25 0 VAC 400 Crank case heater 240 V 20 W Fan Fan Motor Type Propeller Q ty Dia 1 400 Fan motor model Q ty KR35410M01846 1 No...

Page 17: ...ondary BRN BRN 2 0 10 Thermal cut off temp 150 C Indoor Unit MCAV77C5VAB MCAV97C5VAB MCAV127C5VAB Thermistor Coil sensor TH1 PBC 41E S4 Resistance k 20 C 40 1 5 20 C 6 5 5 10 C 24 4 5 30 C 4 4 5 0 C 1...

Page 18: ...RN 1 58 10 Thermal cut off temp 145 C 2A 250V Thermistor Coil sensor TH1 PBC 41E S14 Resistance k 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 5 50 C 2 1 5 Thermistor R...

Page 19: ...IMENSIONAL DATA Indoor Unit KPAV128C5TAA Remote control unit 86 74 74 Center of tubing hole 75 4 places Wide tube 12 7 1 2 Narrow tube 6 35 1 4 Drain hose 26 74 74 900 86 41 41 190 680 18 5 61 172 5 U...

Page 20: ...MCAV97C5VAB MCAV127C5VAB 58 5 99 5 805 177 41 0 41 0 270 Narrow tube 6 35 1 4 Wide tube 9 52 3 8 MCAV77 MCAV97 Wide tube 12 7 1 2 MCAV127 Center of tubing hole 2 places Drain hose 18 Remote control u...

Page 21: ...GRV71L5VAA GRV91L5VAA GRV121L5VAA 700 540 15 255 Narrow tube service valve 6 35 1 4 Wide tube service valve 9 52 3 8 12 7 1 2 170 103 57 470 4 12 holes 116 320 294 Air intake Air discharge GRV71 GRV91...

Page 22: ...ow tube service valve Narrow tube O D 6 35 mm 1 4 Condenser Capillary tube Indoor Unit Outdoor Unit Evaporator Muffler Indoor Unit MCAV127C5VAB Outdoor Unit GRV121L5VAA Compressor Accumulator Wide tub...

Page 23: ...and wet floors due to dripping of condensation both tubes must be well insulated with a proper insulation material The thickness of the insulation should be a min 8 mm After a tube has been insulated...

Page 24: ...0 59 5 0 49 4 0 39 3 Cooling Characteristics 9 8 7 6 5 4 3 2 1 25 30 35 40 45 50 Outdoor inlet air D B temp C Operating current A 10 Indoor inlet air D B temp C 32 27 19 4 32 27 19 4 32 27 19 4 Point...

Page 25: ...0 39 3 Cooling Characteristics 9 8 7 6 5 4 3 2 1 25 30 35 40 45 50 Outdoor inlet air D B temp C Operating current A 10 Indoor inlet air D B temp C 32 27 19 4 32 27 19 4 Points of Rating condition Blac...

Page 26: ...oling Characteristics 11 10 9 8 7 6 5 4 3 25 30 35 40 45 50 Outdoor inlet air D B temp C Operating current A 12 Indoor inlet air D B temp C 32 27 19 4 32 27 19 4 Points of Rating condition Black dots...

Page 27: ...ce m Axis air velocity m s Vertical distance m Axis air verocity Flap angle 0 30 Room air temp 27 C Fan speed High Indoor Unit MCAV97C5VAB 0 1 2 3 4 5 6 7 8 9 1 2 3 4 Horizontal distance m Axis air ve...

Page 28: ...24 Indoor Unit MCAV127C5VAB 0 1 2 3 4 5 6 7 8 9 1 2 3 4 Horizontal distance m Axis air velocity m s Vertical distance m Axis air verocity Flap angle 0 30 Room air temp 27 C Fan speed High...

Page 29: ...0 2 3 4 Horizontal distance m Horizontal distance m Axis air velocity m s Vertical distance m Axis air velocity m s Vertical distance m Room air temp 27 C Fan speed High Axis air verocity Flap angle...

Page 30: ...21 SHC 0 98 0 94 0 90 0 85 0 78 23 SHC 1 15 1 12 1 07 1 02 0 96 19 25 SHC 1 31 1 29 1 24 1 19 1 13 27 SHC 1 48 1 46 1 42 1 36 1 30 29 SHC 1 65 1 63 1 59 1 54 1 47 31 SHC 1 82 1 80 1 76 1 71 1 64 TC 2...

Page 31: ...1 03 1 12 21 SHC 1 21 1 18 1 12 1 05 0 98 23 SHC 1 43 1 39 1 34 1 27 1 19 19 25 SHC 1 64 1 60 1 55 1 49 1 40 27 SHC 1 85 1 82 1 76 1 70 1 62 29 SHC 2 05 2 03 1 97 1 91 1 83 31 SHC 2 27 2 25 2 19 2 12...

Page 32: ...1 51 1 64 21 SHC 1 57 1 52 1 45 1 36 1 26 23 SHC 1 85 1 80 1 73 1 64 1 54 19 25 SHC 2 12 2 07 2 00 1 92 1 82 27 SHC 2 39 2 35 2 28 2 20 2 09 29 SHC 2 65 2 63 2 55 2 48 2 37 31 SHC 2 93 2 91 2 83 2 75...

Page 33: ...1 29 1 38 1 51 1 64 21 SHC 1 57 1 52 1 45 1 36 1 26 23 SHC 1 85 1 80 1 73 1 64 1 54 19 25 SHC 2 12 2 07 2 00 1 92 1 82 27 SHC 2 39 2 35 2 28 2 20 2 09 29 SHC 2 65 2 63 2 55 2 48 2 37 31 SHC 2 93 2 91...

Page 34: ...s A 0 12 0 24 4 04 4 4 Power Input kW 0 027 0 055 0 858 0 94 Full Load Conditions Running Amps A 0 12 0 24 4 54 4 9 Power Input kW 0 027 0 055 0 998 1 08 Rating Conditions Indoor Air Temperature 27 C...

Page 35: ...t kW 0 070 0 07 1 20 1 38 Full Load Conditions Running Amps A 0 29 0 31 6 7 7 3 Power Input kW 0 070 0 07 1 47 1 61 Rating Conditions Indoor Air Temperature 27 C D B 19 C W B Outdoor Air Temperature 3...

Page 36: ...ectric Wiring Diagrams MCAV77C5VAB MCAV97C5VAB MCAV127C5VAB Indoor Unit To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts WARN...

Page 37: ...33 To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts WARNING Indoor Unit KPAV128C5TAA...

Page 38: ...To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts WARNING Outdoor Unit GRV71C5VAA GRV91C5VAA GRV121L5VAA Outdoor Unit 34...

Page 39: ...flow around the unit Fig 1 install the unit within the maximum elevation difference H above or below the outdoor unit and within a total tubing length L from the outdoor unit as detailed Table 1 and...

Page 40: ...l to reduce humidity and protect the unit against possible water damage and decreased service life Fig 5b use lug bolts or equal to bolt down unit reducing vibration and noise Outdoor Unit Outdoor uni...

Page 41: ...that position 3 After confirming correct operation use a screwdriver to screw the supplied special mounting screw into the wall Fig 7a 4 Hang the remote control unit from the mounting screw b Non remo...

Page 42: ...rom the indoor unit to the outdoor unit size of wire and wiring method etc Each wire must be firmly connected No wire should be allowed to touch refrigerant tubing the compressor or any moving part To...

Page 43: ...pressure the control circuit has a built in automatic time delay to allow the internal pressure to equalize As a protective measure the control circuit switches the compressor OFF after 5 minutes or...

Page 44: ...n L LL Dry operation does not occur when the room temperature is under 15 C which is the monitor zone When the compressor stops the indoor fan stops as well NOTE Room temp Cooling operation T 2 C Set...

Page 45: ...least 6 minutes The compressor does not start again until the temperature rises above 8 C or 6 minutes has elapsed 1 Functionally compressor running period or time are of two types 10 minutes and 6 m...

Page 46: ...ivates to control the fan speed automatically If the outdoor temperature falls below 14 C the fan speed switches to MED If the outdoor temperature falls below 1 C the fan speed switches to LOW 42 Outd...

Page 47: ...osition will differ depending on whether it is in gaseous or liquid phase and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state T...

Page 48: ...tallation procedures refer to the installation manuals attached to the indoor unit and outdoor unit 44 Tool Distinction Tool Name Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Ch...

Page 49: ...quickly 3 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R407C Also do not use oxygen or any flammable gas 4 Evacuation Use a solenoid valve insta...

Page 50: ...f the volume of refrigerant in the cylinder becomes less than 20 of the fully charged amount the composition of the refrigerant starts to change Thus do not use the refrigerant if the amount in the re...

Page 51: ...ubes utilizing substitution with nitrogen N2 in the refrigerant circuit of the unit Leave ends of tubes open during welding 4 Checking for sealing Use nitrogen gas for the pressurized gas and never us...

Page 52: ...ing the air conditioning unit Example In case of charging refrigerant to a unit requiring 0 76Kg using a capacity of 10Kg cylinder the minimum necessary amount for the cylinder is 0 76 10 x 0 20 2 76K...

Page 53: ...ns given in 10 6 In case refrigerant is leaking and completely carry out repairs Only then should you recharge the refrigerant 9 8 Retro fitting existing systems 9 8 1 Use of existing units Never use...

Page 54: ...voltage is in specified range 10 of the rating Check that power is being supplied 10 1 4 Check lead wires and connectors in indoor and outdoor units Check that coating of lead wires is not damaged Che...

Page 55: ...OFF Measure insulation resistance of electrical parts in indoor unit 1 Remove inter unit wires from terminal plate in outdoor unit Measure insulation resistance of outdoor unit 2 Remove inter unit wir...

Page 56: ...ary winding TR1 YES NO OPERATION selector switch is set in ON position Set OPERATION selector switch to ON Indoor PCB Ass y is defective NO Check power supply Power is being supplied to the indoor uni...

Page 57: ...econdary winding of transformer TR Indoor PCB Ass y is defective OK OK Measure resistance of indoor and or outdoor fan motor winding FM Measure resistance of compressor motor winding CM OK Measure coi...

Page 58: ...oor unit OK Measure coil resistance of power relay Check indoor PCB Ass y PR OK NO Is room temperature too low Try to lower setting temperature by temperature setting button button Outdoor unit still...

Page 59: ...urnout or foreign matter in bearings Remove foreign matter or repair Repair or replace Measure resistance of outdoor fan motor winding Check fan motor capacitor Fan cannot be turned OK Check fan rotat...

Page 60: ...pacitor Measure resistance of compressor motor winding Measure resistance of power relay PR NO YES YES Overload relay is working Either OLR T or OLR A YES Temperature of compressor is abnormally high...

Page 61: ...approx 10 deg or more Possibility of gas shortage YES Check position of remote control unit Cool air from air conditioner reaches position directly Change position of remote control unit Wide and nar...

Page 62: ...he air conditioner will be in the following conditions as the controller tries to detect extremely high room temperature In Cooling mode The air conditioner continues to operate Thermo ON Both the out...

Page 63: ...ter and measure the resistance by placing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the check 11 1 4 Measurement of Insulation...

Page 64: ...and then place a probe on the capacitor terminals as shown in Fig 7 Observe the deflection of the pointer setting the resistance measuring range of the multimeter to the maximum value The capacitor i...

Page 65: ...mpletely 12 DISASSEMBLY PROCEDURE FOR INDOOR UNIT IMPORTANT Please Read Before Starting Safety precautions for servicing the CEILING MOUNTED indoor unit Center latch Air intake grille Metal clip Air i...

Page 66: ...al of Electrical Component Box 1 Remove the front screw with a screwdriver Fig 4 2 Slide the lid out and up Fig 4 3 Disconnect the wiring as necessary 4 Remove the 4 screws then pull out the electrica...

Page 67: ...e direction of the arrow Fig 6 3 Remove the 2 screws to pull off the flap motor The arm and cam come off together with the motor Fig 7 12 5 Removing Evaporator Indoor Heat Exchange Coil 1 Remove the 7...

Page 68: ...is built into the drain pan Pull out the drain pan together with the evaporator in the direction of the arrow Fig 10 The foamed polystyrene drain pan is fragile DO NOT apply excessive force when remov...

Page 69: ...the fan casing out 3 Insert a hex wrench in the fan boss and turn it counterclockwise to loosen the centrifugal fan The fan can be removed by sliding it to the left Fig 14 4 Remove the 4 bolts to rem...

Page 70: ...INSTRUCTION MANUAL MCAV77C5VAB GRV71L5VAA MCAV97C5VAB GRV91L5VAA MCAV127C5VAB GRV121L5VAA APPENDIX 66...

Page 71: ...information Model and serial numbers are on the nameplate on the bottom of the cabinet Model No Serial No Date of purchase Dealer s address Phone number DECLARATION OF CONFORMITY This product is mark...

Page 72: ...gh the supply wiring 3 Wiring must be done by a qualified electrician Safety Instructions Read this Instruction Manual carefully before using this air conditioner If you still have any difficulties or...

Page 73: ...blown out of the air conditioner through the air outlet Remote Control Unit The wireless remote control unit controls power ON OFF operation mode selection temperature fan speed timer setting and air...

Page 74: ...witch to turn off power completely TEST position This position is used only when servicing the air conditioner CAUTION Do not set at the TEST position for normal operation OPERATION lamp This lamp lig...

Page 75: ...ayed when the temperature setting is at the upper or lower allowable limit Displayed when setting timer C OFF 1HR Symbols Displayed when main unit sensor is in use 3 Set temperature 16 30 C When set t...

Page 76: ...ess the button to increase the set temperature Press the button to reduce the set temperature ON OFF operation button This button is for turning the air conditioner on and off Timer setting buttons Fi...

Page 77: ...ection to one of the six possible positions manually or to select the sweep function which moves the flap up and down automatically The airflow direction can be set manually six positions The flap mov...

Page 78: ...han 1 month take out the batteries How to Use the Remote Control Unit When using the remote control unit always point the unit s transmitter head directly at the air conditioner s receiver Remote Cont...

Page 79: ...ting 1 Momentarily hold the remote control unit at the desired mounting position 2 Confirm that the air conditioner responds correctly when you press keys on the remote control from that position 3 Af...

Page 80: ...to the desired temperature Adjustable temperature range 30 C max 16 C min STEP 4 Set the FAN SPEED selector button to the setting you want NOTE If the fan speed is set to Automatic the fan speed switc...

Page 81: ...position A microcomputer in the air conditioner automatically controls the fan speed when the mode is selected When the air conditioner starts operating the difference between the room temperature an...

Page 82: ...GHT SETBACK OFF ON CLOCK HR C SET TEMP 1 AIR CONDITIONER A When the night setback mode is selected the air conditioner automatically raises the temperature setting 1 C when 30 minutes have passed afte...

Page 83: ...mperature is 15 C or less Power failure during operation In the event of power failure the unit will stop When the power is resumed the unit will restart automatically after three minutes Clicking Sou...

Page 84: ...until 21 is displayed Press the MM button until 10 is displayed The display will auto matically stop flashing except for the symbol after 10 sec OFF 1 Press the Program button OFF ON CLOCK once The ti...

Page 85: ...The timer ON and time indications flash 2 Press the HH button until 7 is displayed Press the MM button until 10 is displayed The display will change automatically back to show the present time after...

Page 86: ...ration button again The 1 Hour Timer function is now cancelled and the unit operates normally NOTE If while the 1 Hour Timer function is operating the 1 HR TIMER button is pressed once to cancel the f...

Page 87: ...Airflow Manually The flap starts moving up and down to deliver air over the sweep range Referring to the above illustration use the FLAP button to set the airflow direction within the range used durin...

Page 88: ...er on the indoor unit to clean it This will damage the internal components and cause an electric shock hazard Casing and Grille Indoor Unit Clean the casing and grille of the indoor unit with a vacuum...

Page 89: ...leaner to remove light dust If there is sticky dust on the filter wash the filter in lukewarm soapy water rinse it in clean water and dry it How to replace the anti mold filter 1 With the FRONT mark f...

Page 90: ...in the position shown in the diagram with the symbols meaning FRONT facing the front 3 Reinstall the anti mold filter Cleaning the main unit and remote control unit Wipe clean using a soft dry cloth...

Page 91: ...e near air intake or air discharge port 4 Remove it to ensure good airflow 5 Thermostat is set too high for cooling 5 Set the temperature lower Clicking sound is heard from the air conditioner In cool...

Page 92: ...S A C olgiate olona printed in italy R D 28 Reyrieux BP 131 01601 Tr voux CEDEX France T l 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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