Technibel GRV127L5 Page 39 Technical & Service Manual Download | Manualshive

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8-2-3. Only outdoor unit does not run.

A. Check setting temperature.

B. Check power relay in outdoor unit. (For AERXXXSC)

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 does
not run.

Remote control unit is defective.

• Try to run using another remote

control unit.

36

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Summary of Contents for GRV127L5

Page 1: ...MCAV77C5 GRV77L5 MCAV97C5 GRV97L5 MCAV127C5 GRV127L5 7 1 6 59 0 18 63 7 6 67 0 5 21 7 21 5 0 8180 044 0 05 99 ...

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 aluminum fins on the air conditioner can cut your fingers When Installing In a Ceiling or Wall Make sure the ceiling wall is strong enough to hold the units weight It may be necessary to construct a st...

Page 3: ...nd after troubleshooting 32 8 2 Air conditioner does not operate 33 8 3 Some part of air conditioner does not operate 37 8 4 Air conditioner operates but abnormalities are observed 40 8 5 If a sensor is defective 41 9 REFRIGERANT R407C SPECIAL PRECAUTIONS WHEN SERVICING THE UNIT 9 1 Characteristics of new refrigerant R407C 42 9 2 Checklist before serving 42 9 3 Tools specifically for R407C 43 9 4 ...

Page 4: ...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 For LOW AMBIENT cooling models GRVXXXL5 ...

Page 5: ...cal Auto Air filter Washable Anti Mold Compressor Rotary Hermetic Refrigerant Amount charged at shipment g R407C 760 Refrigerant control Capillary tube Operation sound Indoor Hi Me Lo dB A 37 31 29 Outdoor Hi dB A 43 Refrigerant tubing connections Flare type Max allowable tubing length at shipment m 7 5 Refrigerant Narrow tube mm in 6 35 1 4 tube diameter Wide tube mm in 9 52 3 8 Refrigerant tube ...

Page 6: ...izontal Manual Vertical Auto Air filter Washable Anti Mold Compressor Rotary Hermetic Refrigerant Amount charged at shipment g R407C 760 Refrigerant control Capillary tube Operation sound Indoor Hi Me Lo dB A 38 33 31 Outdoor Hi dB A 46 Refrigerant tubing connections Flare type Max allowable tubing length at shipment m 7 5 Refrigerant Narrow tube mm in 6 35 1 4 tube diameter Wide tube mm in 9 52 3...

Page 7: ...or Horizontal Manual Vertical Auto Air filter Washable Anti Mold Compressor Rotary Hermetic Refrigerant Amount charged at shipment g R407C 860 Refrigerant control Capillary tube Operation sound Indoor Hi Me Lo dB A 39 35 33 Outdoor Hi dB A 48 Refrigerant tubing connections Flare type Max allowable tubing length at shipment m 7 5 Refrigerant Narrow tube mm in 6 35 1 4 tube diameter Wide tube mm in ...

Page 8: ... poles rpm 230 V High 4 1 130 Nominal output W 10 Coil resistance Ambient temp 20 C Ω 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 capacitor µF 0 6 VAC 440 Flap Motor Type Stepping motor Model MP24GA1 Rating DC 12 V Coil resistance Ambient temp 25 C W WHT BLU respectively 4 wires 380 7 Heat Exch Coil Co...

Page 9: ...190 Nominal output W 10 Coil resistance Ambient temp 20 C Ω 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 capacitor µF 0 8 VAC 440 Flap Motor Type Stepping motor Model MP24GA1 Rating DC 12 V Coil resistance Ambient temp 25 C W WHT BLU respectively 4 wires 380 7 Heat Exch Coil Coil Aluminum plate fin Copp...

Page 10: ...230 Nominal output W 10 Coil resistance Ambient temp 20 C Ω 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 capacitor µF 1 0 VAC 440 Flap Motor Type Stepping motor Model MP24GA1 Rating DC 12 V Coil resistance Ambient temp 25 C W WHT BLU respectively 4 wires 380 7 Heat Exch Coil Coil Aluminum plate fin Copp...

Page 11: ...g amp Ambient temp 25 C Trip in 6 to 16 sec at 13A Run capacitor µF 17 5 VAC 400 Crank case heater Fan Fan Motor Type Propeller Q ty Dia 1 ø400 Fan motor model Q ty UE6T 21D5PA S 1 No of poles rpm 230 V High 6 650 Nominal output W 20 Coil resistance Ambient temp 20 C Ω BRN WHT 381 2 WHT VLT 268 1 VLT YEL 49 71 YEL PNK 84 6 Safety devices Type Internal fuse Operating temp Open C 165 3 Close C Run c...

Page 12: ... Operating amp Ambient temp 25 C Trip in 6 to 16 sec at 16A Run capacitor µF 22 5 VAC 400 Crank case heater Fan Fan Motor Type Propeller Q ty Dia 1 ø400 Fan motor model Q ty UE6T 21D5PA S 1 No of poles rpm 230 V High 6 650 Nominal output W 20 Coil resistance Ambient temp 20 C Ω BRN WHT 381 2 WHT VLT 268 1 VLT YEL 49 71 YEL PNK 84 6 Safety devices Type Internal fuse Operating temp Open C 165 3 Clos...

Page 13: ...erating amp Ambient temp 25 C Trip in 6 to 16 sec at 21A Run capacitor µF 25 0 VAC 400 Crank case heater 240 V 20 W Fan Fan Motor Type Propeller Q ty Dia 1 ø400 Fan motor model Q ty UE6T 21H5P S 1 No of poles rpm 230 V High 6 770 Nominal output W 20 Coil resistance Ambient temp 20 C Ω WHT BRN 264 5 WHT VLT 227 9 VLT YEL 22 53 YEL PNK 42 37 Safety devices Type Internal fuse Operating temp Open C 14...

Page 14: ...Primary AC 230V 50Hz Secondary 19V 0 315A Capacity 6VA Coil resistance Ω at 22 C Primary WHT WHT 455 10 Secondary BRN BRN 2 85 10 Thermal cut off temp 145 C Outdoor Unit GRV77L5 GRV97L5 GRV127L5 Thermistor Room sensor DTN TKS134B Resistance kΩ 25 C 5 0 3 Thermistor Coil sensor DTN TKS131B Resistance kΩ 0 C 15 0 2 Transformer TR ATR J105 Rating Primary AC 230V 50 60Hz Secondary 19V 0 526A Capacity ...

Page 15: ...nit MCAV77C5 MCAV97C5 MCAV127C5 58 5 99 5 805 177 41 0 41 0 270 Narrow tube ø6 35 1 4 Wide tube ø9 52 3 8 MCAV77 97 Wide tube ø12 7 1 2 MCAV127 Center of tubing hole 2 places Drain hose ø18 Remote control unit 18 5 61 172 5 Unit mm ...

Page 16: ...6 608 247 225 4 ø12 holes Narrow tube service valve ø6 35 1 4 84 57 Wide tube service valve ø9 52 3 8 220 380 790 24 525 17 4 ø3 1 holes 336 380 Location of Service Valve Service valves are located behind the side panel See the illustration below NOTE Unit mm ...

Page 17: ...Unit GRV127L5 276 4 ø12 holes 312 Air intake Air discharge 608 60 530 380 88 17 750 380 273 4 ø3 3 holes Check port ø6 35 1 4 270 61 93 Wide tube service valve ø12 7 1 2 Narrow tube service valve ø6 35 1 4 Unit mm ...

Page 18: ...CAV97C5 Outdoor Unit GRV97L5 Compressor Accumulator Wide tube service valve Wide tube O D ø9 52 mm 3 8 Narrow tube service valve Narrow tube O D ø6 35 mm 1 4 Condenser Capillary tube Indoor Unit Outdoor Unit Evaporator Strainer MCAV77C5 GRV77L5 ...

Page 19: ...ss of the insulation should be a min 8 mm After a tube has been insulated never try to bend it into a narrow curve because it can cause the tube to break or crack IMPORTANT CAUTION Wide tube Thickness Min 8 mm Insulation Narrow tube Thickness Min 8 mm Capillary tube Compressor Accumulator Wide tube service valve Wide tube O D ø12 7 mm 1 2 Narrow tube service valve Narrow tube O D ø6 35 mm 1 4 Cond...

Page 20: ...ition Black dots in above charts indicate the following rating conditions Cooling Indoor air temperature 27 C D B 19 C W B Outdoor air temperature 35 C D B 24 C W B NOTE Indoor Unit AWR509CL Outdoor Unit AER509SC or AER509SCL 13 12 11 10 9 8 7 6 25 30 35 40 45 50 Outdoor inlet air D B temp C 5 4 3 Indoor inlet air D B temp C Cooling Characteristics Indoor inlet air D B temp C 9 8 7 6 5 4 3 2 1 25 ...

Page 21: ... 3 25 30 35 40 45 50 Outdoor inlet air D B temp C Operating current A 12 Low pressure at wide tube service valve kg cm 2 G 32 27 21 32 27 21 Points of Rating condition Black dots in above charts indicate the following rating conditions Cooling Indoor air temperature 27 C D B 19 C W B Outdoor air temperature 35 C D B 24 C W B NOTE Indoor Unit MCAV127C5 Outdoor Unit GRV127L5 ...

Page 22: ...2 Air Throw Distance Chart Indoor Unit MCAV77C5 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 23: ... velocity m s Vertical distance m Axis air verocity Flap angle 0 30 Room air temp 27 C Fan speed High Indoor Unit MCAV127C5 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 24: ... 2 17 2 07 1 97 1 86 1 71 TC 2 42 2 31 2 21 2 10 1 97 1 82 CM 0 48 0 51 0 55 0 59 0 65 0 71 21 SHC 1 07 1 03 0 99 0 94 0 89 0 83 19 23 SHC 1 29 1 24 1 20 1 16 1 11 1 05 25 SHC 1 51 1 46 1 42 1 38 1 33 1 26 27 SHC 1 72 1 68 1 63 1 59 1 54 1 48 29 SHC 1 94 1 89 1 85 1 81 1 76 1 70 31 SHC 2 15 2 11 2 07 2 03 1 97 1 82 TC 2 56 2 45 2 34 2 23 2 09 1 93 CM 0 49 0 53 0 57 0 61 0 67 0 73 23 SHC 1 06 1 01 ...

Page 25: ... 2 49 2 34 2 15 TC 3 05 2 92 2 78 2 65 2 49 2 29 CM 0 68 0 74 0 79 0 85 0 91 0 96 21 SHC 1 35 1 29 1 23 1 18 1 11 1 03 19 23 SHC 1 58 1 52 1 46 1 41 1 34 1 26 25 SHC 1 81 1 75 1 70 1 64 1 57 1 49 27 SHC 2 05 1 99 1 93 1 87 1 81 1 73 29 SHC 2 28 2 22 2 16 2 11 2 04 1 96 31 SHC 2 51 2 45 2 40 2 34 2 27 2 19 TC 3 23 3 09 2 95 2 81 2 64 2 43 CM 0 70 0 76 0 81 0 87 0 93 0 99 23 SHC 1 33 1 27 1 21 1 16 ...

Page 26: ...0 3 01 2 92 2 80 TC 4 03 3 85 3 68 3 50 3 29 3 03 CM 1 01 1 10 1 17 1 26 1 36 1 47 21 SHC 1 80 1 72 1 63 1 55 1 45 1 34 19 23 SHC 2 04 1 96 1 87 1 79 1 69 1 58 25 SHC 2 28 2 20 2 11 2 03 1 94 1 82 27 SHC 2 52 2 44 2 35 2 27 2 18 2 06 29 SHC 2 77 2 68 2 60 2 51 2 42 2 30 31 SHC 3 01 2 92 2 84 2 75 2 66 2 54 TC 4 27 4 08 3 90 3 71 3 49 3 21 CM 1 04 1 13 1 21 1 30 1 40 1 51 23 SHC 1 77 1 69 1 61 1 53...

Page 27: ... Power Input kW 0 029 0 033 0 064 0 073 1 23 1 26 1 32 1 37 Full Load Conditions Running Amps A 0 13 0 14 0 29 0 30 7 2 7 0 7 6 7 4 Power Input kW 0 029 0 033 0 064 0 073 1 52 1 55 1 61 1 66 Rating Conditions Indoor Air Temperature 27 C D B 19 C W B Outdoor Air Temperature 35 C D B Full Load Conditions Indoor Air Temperature 32 C D B 23 C W B Outdoor Air Temperature 43 C D B Indoor Unit MCAV127C5 ...

Page 28: ...5 6 2 Electric Wiring Diagrams To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts WARNING Indoor Unit MCAV77C5 MCAV97C5 MCAV127C5 ...

Page 29: ...26 To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts WARNING Outdoor Unit GRV77 97L5 ...

Page 30: ...27 To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts WARNING Outdoor Unit GRV127L5 ...

Page 31: ...t 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 more of compressor operation Thermo ON When the room temperature is above T 1 C T C is set temperature Compressor ON Thermo OFF When the room temperature is equal to or below set temperature T C Comp...

Page 32: ...en 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 temp T C T 1 C Monitor zone Both the indoor and outdoor units stop Room temp 15 C Dry A zone Compressor FMI indoor fan Continuous operation L low speed LL very low speed intermittent ventilation only...

Page 33: ...t 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 minutes depending upon production date NOTE ON ON ON ON OFF OFF Set speed More than 10 minutes 6 minutes T 1 C Indoor heat exch coil temp 1 C Compressor Indoor fan Room temp Thermo OFF Thermo ON Set t...

Page 34: ...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 31 Outdoor temperature 14 C 1 C Fan speed Fan motor output HIGH MEDIUM LOW 7 1 YEL BRN 3 1 WHT BRN 5 1 VLT BRN Line voltage 220 240V 1 2 1 Regardless of outdoor temperature outdoor fan motor operates at first at HIGH ...

Page 35: ...oltage is in specified range 10 of the rating Check that power is being supplied 8 1 4 Check lead wires and connectors in indoor and outdoor units Check that coating of lead wires is not damaged Check that lead wires and connectors are firmly connected Check that wiring is correct Outdoor unit Indoor unit Power supply Single phase 220 240V 50Hz Ground Ground Inter unit power wiring Power plug Loca...

Page 36: ...stance 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 wires from terminal plate in indoor unit Then pull the power plug out of the wall outlet Measure insulation resistance of indoor unit Insulation of outdoor unit is defective Insulation of indoor unit is defective Set circuit break...

Page 37: ...R 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 unit Circuit breaker is tripped Power failure Reset breaker Wait for recovery or contact power company Replace with suitable one larger capacity NO Check capacity of circuit breaker Capacity of circuit breaker is suit...

Page 38: ...secondary 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 coil resistance of power relay in outdoor unit PR Replace the fuse If fuse has been blown OK Try to run with another remote control unit First remote control unit is defective Check for residue buildup ...

Page 39: ...it For AERXXXSC 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 does not run Remote control unit is defective Try to run using another remote control unit 36 ...

Page 40: ...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 rotation Turn fan gently once or twice by hand Check fan casing foreign matter on inside Fan motor burnout or foreign matter in bearings Remove foreign matter or repair Repair or replace Measure resistance...

Page 41: ... y If fuse blows Check fuse on outdoor PCB Ass y for continuity OK Measure resistance of primary winding of transformer TR2 OK Measure resistance of outdoor fan motor winding Outdoor PCB Ass y is defective F Measure resistance of primary and secondary winding TR2 38 ...

Page 42: ... PR NO YES YES Overload relay is working Either OLR T or OLR A YES Temperature of compressor is abnormally high Refrigerant gas shortage Recover refrigerant R407C Rotor may be locked up C1 Measure Power supply voltage The voltage is too low No Evacuate the air conditioner YES For compressor replacement refer to 10 5 In case of compressor malfunction CAUTION In case of leakage do not add refrigeran...

Page 43: ...bility 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 narrow tubes between indoor unit and outdoor unit are insulated Insulate both wide and narrow tubes separately and then tape together Measure temperature of suction and discharge air of air conditioner Recover refrigerant Check for...

Page 44: ...e 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 outdoor fan and compressor do not stop As a result the room becomes too cold Definition of Open or Short Circuit of Sensor Thermistor Open A lead wire is broken or disconnected or the circuit inside the t...

Page 45: ...position 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 Thus always charge the refrigerant while it is in the liquid phase Ether type oil is used for the compressor oil for R407C type units which is different from the mineral oil used for R22 Thus more att...

Page 46: ...stallation procedures refer to the installation manuals attached to the indoor unit and outdoor unit 43 Tool Distinction Tool Name Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Tools specifically for R407C Refrigerant recovery unit Vacuum pump with anti reverse flow 1 Solenoid valve installed type which prevents oil from flowing back into the unit when the p...

Page 47: ... 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 installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back The equipment may be damaged if ...

Page 48: ...if 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 refrigerant cylinder is less than 20 Also charge the minimum necessary amount to the cylinder before using it for charging the air conditioning unit Example In case of charging refrigerant to a unit re...

Page 49: ...tubes 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 use a refrigerant other than R407C Also do not use oxygen or any flammable gas 5 Evacuation Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of ai...

Page 50: ...ging 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 76Kg For the remaining refrigerant refer to the instructions of the refrigerant manufacturer If using a charging cylinder transfer the specified amount of liquid refrigerant from the refrigerant cylinde...

Page 51: ...ons 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 new refrigerant R407C for existing units which use R22 This will cause the air conditioner to operate improperly and may result in a hazardous condition 9 8 2 Use of existing tubing If replacing an o...

Page 52: ...ster 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 10 1 4 Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the desired electric part from terminal plate capacitor etc Similarly disconnect the connector Then measure the insulation resistance Fig...

Page 53: ...s from the capacitor terminals 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 is good if the pointer bounces to a great extent and then gradually returns to its original position The range of deflection and deflection time differ according to the ca...

Page 54: ...reavviso Par souci d amélioration constante nos produits peuvent être modifiés sans préavis Unsere Produkte werden laufend verbessert und können Vorankündigung abgeändert Werden En el interés de mejoras constantes nuestros productos pueden modificarse sin aviso prévio 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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