Technibel GR54M2R Page 1 Technical Data & Service Manual Download

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TECHNICAL DATA & SERVICE MANUAL

Outdoor Unit

Indoor Unit

GR54M2R MCA27RM (X2)

MULTI-SPLIT SYSTEM AIR CONDITIONER

Indoor Unit Outdoor Unit

MCA27RM GR54M2R

0.8180.180.0 03/2001

Summary of Contents for GR54M2R

Page 1: ...TECHNICAL DATA SERVICE MANUAL Outdoor Unit Indoor Unit GR54M2R MCA27RM X2 MULTI SPLIT SYSTEM AIR CONDITIONER Indoor Unit Outdoor Unit MCA27RM GR54M2R 0 8180 180 0 03 2001...

Page 2: ...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 co...

Page 3: ...N 9 1 Room Temperature Control 18 9 2 Dry Operation 20 9 3 Freeze Prevention 21 9 4 Overload Prevention 21 9 5 Cold Draft Prevention 22 9 6 Defrosting Operation 23 10 TROUBLESHOOTING 10 1 Check before...

Page 4: ...iii Unit Combination Combine indoor and outdoor units only as listed below Indoor Unit Outdoor Unit A B Refer to Outdoor Unit Symbol of Indoor Unit GR54M2R A Indoor Unit MCA27RM B Fig 1 MCA27RM Fig 1...

Page 5: ...NGE 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 19 C D B Heating Maximum 27 C D B 24 C D B 18 C W B Minimum 16 C D B...

Page 6: ...ol Microprocessor I C thermostat Control unit Wireless remote control unit Timer ON OFF 24 hours Daily program 1 hour OFF Fan speeds Indoor Outdoor 3 and Auto 1 Hi Airflow direction Indoor Horizontal...

Page 7: ...r I C thermostat Control unit Wireless remote control unit Timer ON OFF 24 hours Daily program 1 hour OFF Fan speeds Indoor Outdoor 3 and Auto 1 Hi Airflow direction Indoor Horizontal Manual Vertical...

Page 8: ...4 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 Type Internal thermal fuse devices Operating temp Open C 145 2...

Page 9: ...mp Ambient temp 25 C Trip in 6 to 16 sec at 16 5 A Run capacitor F 22 5 2 Q ty VAC 400 2 Type Propeller Q ty Dia mm 1 400 Fan motor model Q ty SG6 51B5P 1 No of poles rpm 230 V High 6 910 Nominal outp...

Page 10: ...DTN TKS131B Resistance k 0 C 15 0 2 Thermistor Room sensor DTN TKS134B Resistance k 25 C 5 0 3 Outdoor Unit GR54M2R Power Relay PRA PRB DFU24D1 F M Coil rating DC 24V Coil resistance at 20 C 650 10 Co...

Page 11: ...3 DIMENSIONAL DATA Indoor Unit 7 MCA27RM...

Page 12: ...95 58 337 307 630 19 Narrow tube service valve 6 35 1 4 1 Wide tube service valve 9 52 3 8 2 305 830 4 12 holes Air discharge Air intake 538 146 2 Magnified illustration 3 1 To Indoor Unit B To Indoor...

Page 13: ...2 68 2 57 2 44 2 30 2 11 TC 2 99 2 86 2 73 2 60 2 44 2 25 CM 0 72 0 78 0 84 0 90 1 00 1 11 21 SHC 1 32 1 27 1 21 1 16 1 09 1 01 19 23 SHC 1 56 1 50 1 44 1 39 1 32 1 24 25 SHC 1 79 1 73 1 68 1 62 1 56...

Page 14: ...Indoor 20 C D B Outdoor 7 C D B 6 C W B 2 Above characteristics indicate instantaneous operation which does not take into account defrost operation 3 Fan speed High 4 Because this air conditioner heat...

Page 15: ...city m s Vertical distance m Axis air velocity Flap angle 45 60 Room air temp 20 C Fan speed High Heating 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 Ax...

Page 16: ...Accumulator Compressor A 4 Way valve 4 Way valve Drier Check valve Strainer Heat exchanger Narrow tube O D 6 35mm 1 4 Wide tube O D 9 52mm 3 8 Muffler Accumulator Compressor B Wide Tube Service valve...

Page 17: ...Narrow Tube Service valve Capillary tube Drier Drier 4 Way valve 4 Way valve Insulation of Refrigerant Tubing To prevent heat loss and wet floors due to dripping of condensation water both the wide a...

Page 18: ...ndoor unit 1 Unit 2 Units Either A or B Both A and B Rating Conditions Running amp A 4 6 9 3 Power input kW 1 01 2 08 Full Load Conditions Running amp A 5 7 11 8 Power input kW 1 28 2 65 Number of ind...

Page 19: ...8 2 Electric Wiring Diagram 15 Indoor Unit MCA27RM...

Page 20: ...16 Outdoor Unit GR54M2R...

Page 21: ...B temp C 14 12 10 25 Indoor inlet air D B temp C Low pressure at wide tube service valve kg cm 2 G High pressure at wide tube service valve kg cm 2 G 32 27 21 32 27 21 27 20 15 27 20 15 Overload preve...

Page 22: ...rant pres sure 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 minute...

Page 23: ...ctive measure the control circuit switches the compressor OFF after 5 minutes or more of compressor operation Thermo ON When the room temperature is below T 1 C T C is set temperature Compressor ON Th...

Page 24: ...Both the indoor and outdoor units stop Room temp 15 C Dry A1 zone Compressor FMI indoor fan Continuous operation L low speed LL very low speed intermittent ventilation only while the compressor is ON...

Page 25: ...ate 9 4 Overload Prevention Heating This function prevents overheating of the indoor heat exchange coil When the temperature of the indoor heat exchange coil rises above 49 C and if the indoor fan is...

Page 26: ...out before the indoor heat exchange coil have sufficiently warmed up STANDBY lamp on front of the indoor unit lights up when the indoor fan speed is either LL or OFF 22 LL Very low speed Initial star...

Page 27: ...eg 6 min or more and repeats 3 times continuously Heating operation 20 minutes masking 6 minutes masking Temperature in outdoor heat exchanger coil falls to 14 C or lower Preparation for defrosting Te...

Page 28: ...FF OFF 30 sec ON ON ON 5 sec 5 sec ON ON ON ON 5 sec ON ON OFF OFF OFF OFF OFF 1 min Defrosting 13 5 min or outdoor coil temp 26 C 65 sec 65 sec ON Standby lamp A Indoor fan A Outdoor fan 4 way valve...

Page 29: ...er 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 Check that lead wires and connectors are firmly con nected Check...

Page 30: ...stance of electrical parts in outdoor unit NO NO Set circuit breaker to OFF Measure insulation resistance of electrical parts in indoor unit 1 Remove both power supply wires and inter unit wires from...

Page 31: ...re Reset breaker Wait for recovery or contact power company YES NO OPERATION selector switch is set in ON position Set OPERATION selector switch to ON Switch Ass y or indoor PCB Ass y is defective OK...

Page 32: ...see if light is ON Light is OFF Measure resistance of primary and secondary winding of transformer TR Indoor PCB Ass y or switch Ass y is defective OK Measure resistance of indoor fan motor winding F...

Page 33: ...un Remote control unit is defective Try to run using another remote control unit COOL OK NO Is room temperature too high Try to raise setting temperature by temperature setting button warmer Outdoor u...

Page 34: ...out or foreign matter in bearings Remove foreign matter or repair Repair or replace Measure resistance of indoor fan motor winding Check fan motor capacitor Fan cannot be turned Check fan casing for f...

Page 35: ...ressor motor capacitor YES YES YES Overload relay is working Refrigerant gas shortage Charge refrigerant gas R22 Temperature of compressor is abnormally high Rotor may be locked up OLR 1 to 4 CA CB Me...

Page 36: ...will switch to cooling or drying operation Example Unit A in heating mode Unit B in cooling or drying mode Unit A in heating mode Heating operation takes precedence Unit B fan operating If the units a...

Page 37: ...ate both wide and narrow tubes separately and then tape together Measure temperature of suction and discharge air of air conditioner Charge refrigerant gas R22 Check for clogging of air filter Fan spe...

Page 38: ...e air conditioner will be in the following conditions as the controller tries to detect extremely high room temperature a In Cooling mode The air conditioner continues to operate Thermo ON Both the ou...

Page 39: ...OLR3 Overload relay OLR1 Power relay B PRB Power relay A PRA Terminal Plate To Power supply Terminal Plate To Indoor Unit B Terminal Plate To Indoor Unit A Varistor SA2 Compressor A CMA Compressor B...

Page 40: ...t of the unit with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate F...

Page 41: ...nt insert a fuse of the same rating and solder it Allow time to radiate heat during soldering so that the fuse does not melt 12 3 Checking Motor Capacitor Remove the lead wires from the capacitor term...

Page 42: ...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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