Mitsubishi Electric MSZ-GC22VA Service Manual Download Page 6 | Manualshive

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WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

7

MSZ-GC22VA
MSZ-GC25VA
MSZ-GC35VA

Refrigerant flow in cooling
Refrigerant flow in heating

Indoor

heat

exchanger

Flared connection

Room temperature
thermistor
RT11

Flared connection

Refrigerant pipe

[

9.52

(with heat insulator)

Refrigerant pipe

[

6.35

(with heat insulator)

Indoor coil
thermistor
RT12 (main)

Indoor coil
thermistor
RT13 (sub)

Unit : mm

MSZ-GC22VA
MSZ-GC25VA
MSZ-GC35VA

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Summary of Contents for MSZ-GC22VA

Page 1: ...SEMBLY INSTRUCTIONS 26 MSZ GC22VA MSZ GC22VA MSZ GC25VA MSZ GC25VA MSZ GC35VA MSZ GC35VA E2 E1 E2 E1 E2 E1 SPLIT TYPE HEAT PUMP AIR CONDITIONERS NOTE RoHS compliant products have G mark on the spec name plate Outdoor unit service manual MUZ GC VA Series OBH469 MXZ A VA Series OB377 MXZ 8A140A OC316 SERVICE MANUAL Wireless type Models No OBH468 REVISED EDITION B INDOOR UNIT PARTS CATALOG OBB468 Rev...

Page 2: ...vane Remote controller Remote control receiving section Emergency operation switch E O SW Air cleaning filter Anti allergy enzyme filter option Line flow fan Revision A 10 TROUBLESHOOTING has been corrected Color of lead wire indoor fan motor sensor part of 10 5 Trouble criterion of main parts has been corrected 10 6 ACheck of indoor fan motor has been corrected Revision B has been added E2 MSZ GC...

Page 3: ...Indoor model Function Power supply 36 29 21 Cooling 576 462 354 246 1 070 890 720 550 Heating 600 480 378 276 1 100 920 760 600 RC4V18 BA or CA Cooling 552 444 330 234 1 110 930 740 580 Heating 570 462 354 246 1 140 960 780 600 Air flow Super High Air flow High Med Low Running current 1 Power input 1 Fan motor current 1 Model Dimensions WOHOD Weight Air direction Sound level Super High Sound level...

Page 4: ...er High FAN SPEED HEATING Test conditions Cooling Dry bulb temperature 27 Wet bulb temperature 19 Heating Dry bulb temperature 20 43 43 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE MSZ GC35VA 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz APPROXIMATE THRESH...

Page 5: ...g Insulation 35 O D Liquid line 6 35 0 5 m Flared connection 6 35 Gas line 9 52 0 43 m Flared connection 9 52 Drain hose Insulation 28 O D Connected part 16 O D 11 X 26 Oblong hole 11 X 20 Oblong hole Installation plate Indoor unit Wall hole 65 Air in Air out Installation plate Piping Drain hose 19 159 58 234 5 788 MSZ GC22VA MSZ GC25VA MSZ GC35VA ...

Page 6: ... Refrigerant flow in heating Indoor heat exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe 9 52 with heat insulator Refrigerant pipe 6 35 with heat insulator Indoor coil thermistor RT12 main Indoor coil thermistor RT13 sub Unit mm MSZ GC22VA MSZ GC25VA MSZ GC35VA ...

Page 7: ...at left Same as at left Same as at left Solder both J1 and J2 Table 1 How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit The indoor unit will only accept the signal from the remote controller that has been assigned to ...

Page 8: ...e special counter measures are required to prevent the main voltage drop or the rush of the starting current by adding to the system that allows the units to start one by one JR07 Indoor electronic control P C board CN10A CN111 CN151 CN112 8 3 AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode the set temperature and the fan speed are memorized b...

Page 9: ...erature Room temperature About 1 to 2 from set temperature The unit is operating to reach the set temperature The room temperature is approaching the set temperature Standby mode only during multi system operation Operation state Indication Lighted Not lighted The following indication applies regardless of shape of the indicator Blinking MSZ GC22VA MSZ GC25VA MSZ GC35VA ON TIMER button CLOCK SET b...

Page 10: ...ode with OPERATION SELECT button 3 Press TEMPERATURE buttons TOO WARM or TOO COOL button to select the desired temperature The setting range is 16 31 C 2 High pressure protection The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con densing pressure from increasing excessively When the temperature of indoor heat exchanger becomes too ...

Page 11: ...evention 5 STOP operation OFF and ON TIMER standby In the following cases the horizontal vane returns to the closed position a When OPERATE STOP ON OFF button is pressed POWER OFF b When the operation is stopped by the emergency operation c When ON TIMER is ON standby NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT MXZ series Multi system air conditioner can connect two or more indoor units w...

Page 12: ...ally set 2 C higher Also the horizontal vane swings in various cycle SWING operation makes you feel cooler than set temperature So even though the set temperature is higher the air conditioner can keep comfort As a result energy can be saved ECONO COOL operation is cancelled when ECONO COOL button is pressed once again or VANE CONTROL button is pressed or change to other operation mode 9 6 TIMER O...

Page 13: ...peed shifts to Med In the test run or emergency operation the horizontal vane operates in VANE AUTO mode Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller In case of latter normal operation will start NOTE Do not press EMERGENCY OPERATION switch during normal operation 2 To release the timer To release...

Page 14: ...e 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and then after confirming the horizontal vane is closed turn OFF the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the cab...

Page 15: ...eck the blinking pattern and confirm the abnormal point with the indoor unit failure mode table 10 2 2 Make sure to check at least two consecutive blinking cycles W2 Turn ON the power supply Preparation of the remote controller 1 While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button 2 First release RESET button And release the ...

Page 16: ... second OFF Refer to the characteristics of the main indoor coil thermistor the sub indoor coil thermistor 10 7 Indoor coil thermistor The indoor coil thermistor short or open circuit is detected every 8 seconds during operation 3 time flash 2 5 second OFF Refer to 10 6 D How to check mis wiring and serial signal error Serial signal The serial signal from outdoor unit is not received for 6 minutes...

Page 17: ... is pressed Upper lamp Flash on and off at 0 5 second intervals Cause Indoor Outdoor unit Mis wiring or trouble of serial signal Upper lamp 2 time flash Cause Indoor unit Trouble of room temp erature indoor coil thermistor Upper lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor Upper lamp 5 time flash Cause Outdoor unit Outdoor power system abnormality Upper lamp 6 time flash Cause O...

Page 18: ...lash 2 5 second OFF The rotational frequency feedback signal is not emitted during the indoor fan operation Refer to 10 6 A Check of indoor fan motor Indoor unit and outdoor unit do not operate Upper lamp flashes 5 time flash 2 5 second OFF Upper lamp flashes 6 time flash 2 5 second OFF Other abnormality An abnormality other than above mentioned is detected Check the stop valve Confirm the abnorma...

Page 19: ...K 235 255 Color of the lead wire WHT BLK BLK RED Normal RC4V18 BA 273 296 295 320 Color of lead wire RC4V18 CA 308 334 295 320 OPERATION INDICATOR OPERATION INDICATOR No 1 Symptom Operation indicator lamp Condition Correspondence Abnormal point 0 5 second ON 0 5 second OFF The electricity is not conducted to the interlock switch Fan of the horizontal vane Refer to 10 6 E Check of installation of t...

Page 20: ...o not clear Yes No No No Check of indoor fan motor A When OPERATION INDICATOR lamp flashes 3 time Indoor fan does not operate 10 6 Troubleshooting flow CN211 Indoor power P C board Fuse F11 Indoor terminal P C board Varistor NR11 CN121 Is the resistance 0 short circuit or open circuit Yes 0 or No Yes No Turn OFF the power supply Check connector CN211 visually Disconnect the lead wires from connect...

Page 21: ...tern side of the indoor terminal P C board visually Replace the varistor NR11 and fuse F11 w Are the varistor NR11 burnt and the fuse F11 blown Be sure to check both the fuse and the varistor in any case No Yes No Is the fuse F11 blown only Yes No Is the resistance normal Is the approx 5VDC between 5V and JPG GND of the indoor electronic control P C board Is there approx 9V to 13VDC between 12V an...

Page 22: ...ck S2 and S3 Confirmation of serial signal Is there rated voltage between indoor terminal block S1 and S2 Confirmation of power voltage No No No Yes Yes Yes Replace the inverter P C board or the outdoor electronic control P C board W2 Is there any error of the indoor outdoor connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block No Replace the ind...

Page 23: ...lock the stopper of the horizontal vane to the indoor unit Refer to 10 1 5 Yes Are all lamps flashing Yes No No OK Turn ON the power supply To check the continuity of the interlock switch Fan measure the resistance of connector 1 2 connected to CN1R1 on the indoor electronic control P C board Turn OFF the power supply Turn OFF the power supply When All lamps flash ON and OFF every 0 5 second Indoo...

Page 24: ...nit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver 5 Electric field intensity of the broadcast station affected by the electromagnetic noise 6 Presence or absence of amplifier such as booster 7 Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn ON the power supply In this...

Page 25: ...tor CN151 Connector to Indoor power P C board CN10A 12V DC 5V DC Release of Auto restart function Solder the Jumper wire to JR07 Refer to 8 3 Emergency operation switch E O SW SW1 2 Indoor electronic control P C board Indoor terminal P C board Indoor power P C board w Please replace the fuse after removing the indoor terminal P C board from the electrical box Fuse F11 w Varistor NR11 Terminal bloc...

Page 26: ...e are two types Refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching Terminal with locking mechanism Detaching points Connector Sleeve Locking lever MSZ GC22VA MSZ GC25VA MSZ GC35VA OPERATING PROCEDURE PHOTOS Photo 1 1 Removing the panel 1 Remove the screw caps of the panel ...

Page 27: ...nd the room temperature thermistor 1 Turn the breaker OFF 2 Remove the panel Refer to 1 and the corner box 3 Open the indoor electronic control P C board holder to right side and disconnect connectors of the indoor coil thermistor CN112 vane motor CN151 interlock switch CN1R1 and connector CN10A to the indoor power P C board on the indoor electronic control P C board 4 Unhook the catches of the in...

Page 28: ...little and pull right to remove the fan motor together with motor band bed 6 Remove the indoor coil thermistor from the heat exchanger w Install the indoor coil thermistor in its former position when assembling it Refer to Photo 7 7 Remove the screws fixing the left side of the heat exchang er 8 Lift the left side of the heat exchanger and pull out the line flow fan to the lower left Photo 6 Photo...

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