msz-gc35va
Contents
1. FAN SPEED CONTROL button ON OFF OPERATION SELECT button ECONO COOL button OPERATE STOP ON OFF button OFF TIMER button ON TIMER button Open the front lid TIME SET buttons Temperature buttons FORWARD button BACKWARD button CLOCK SET button CRESET b tt n VANE CONTROL button N Indication of remote controller model is on back Once the operation mode is set the same operation mode can be repeated by simply turning OPERATE STOP ON OFF button ON Indoor unit receives the signal with a beep tone When the system turns off 3 minute time delay will operate to protect system from overload and compressor will not restart for 3 minutes INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state The following indication applies regardless of shape of the indicator Indication Operation state Room temperature T Lighted The unit is operating About 2 C or more i to reach the set away from Blinking S temperature set temperature L Not lighted S The room temperature is approaching set temperature am Standby mode SE only during multi system operation 9 1 COOL a2. 4 NOISE CRITERIA CURVES MSZ GC22VA MSZ GC35VA MSZ GC25VA FAN SPEED FUNCTION SPL dB A LINE FAN SPEED FUNCTION SPL dB A LINE COOLING 43 oe COOLING 43 e Super High Super High HEATING 43 O O HEATING 43 O O 90 T T T T 90 80 80 70 70 NC 70 f Jno 60 60 NC 60 50 50 AA a TAI I NC 50 40 40 NC 40 30 30 NC 30 HAHAH 20 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 20 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 4NC 20 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR z Q 8 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR aS 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb temperature 27C Wet bulb temperature 19 C Heating Dry bulb temperature 20 C INDOOR UNIT WALL im 0 8m OY MICROPHONE 5 OUTLINES AND DIMENSIONS Unit mm MSZ GC22VA M
3. Indoor electronic control P C board Indoor terminal P C board Indoor power P C board JPG GND Is the resistance approx 40 Yes Is the approx 5VDC between and JPG GND of the indoor electronic control P C board Is there approx 9V to 13VDC between 12V and JPG GND of the indoor electronic control P C board No Replace the indoor power terminal P C board and the indoor fan motor Yes z Replace the indoor fan motor CN10A No 12VDC Y Are connector CN10A on 5VDC the indoor electronic control disconnected Fuse F11 R111 P C board or lead wires Connect the connector or repair disconnection Replace the indoor power terminal P C board CN211 No Y 21 When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch Indoor unit does not operate When OPERATION INDICATOR lamp flashes ON and OFF every 0 5 seconds Outdoor unit does not operate D How to check mis wiring and serial signal error C Turn OFF the power supply D n Yes Turn ON the power supply Y Is there rated voltage between o outdoor terminal block S1 and 52 Yes Press EMERGENCY OPERATION switch once INDICATOR lamp light up lt Confirmation of the power to the indoor unit gt Yes Y the upper lamp of OPERATION Y Is serial
4. is pressed the set time increases by 10 minutes each time BACKWARD but ton CO is pressed the set time decreases by 10 minutes 12 ww si 2 To release the timer To release ON timer press ON TIMER button fest To release OFF timer press OFF TIMER button fecal TIMER is cancelled and the display of set time disappears PROGRAM TIMER OFF timer and ON timer can be used in combination The timer of the set time that is reached first will operate first 4 and display shows the order of OFF timer and ON timer operation Example 1 The current time is 8 00 PM Example 2 The current time is 11 00 AM The unit turns off at 11 00 PM and on at 6 00 AM The unit turns on at 5 00 PM and off at 9 00 PM Current Current oN oN OFF OFF ade 0 SEE zi nn T eli L C POL los 1 dd wir I LILI 00 Os OQ 4 6 NOTE If the main power is turned off or a power failure occurs while ON OFF timer is active the timer setting is cancelled As these models are equipped with an auto restart function the air conditioner starts operating with timer cancelled when power is restored 9 7 EMERGENCY TEST OPERATION In case of test run operation or emergency operation use EMERGENCY OPERATION switch on the right side of the indoor unit Emergency operation is available when the remote controller is missing has failed or the batt
5. Color of lead wire Motor part Measure the voltage power ON Color of lead wire Normal BRN YLW 4 5 5 5V When fan revolved one time BRN GRY 0 35 0 Sensor Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Color of the lead wire Normal RED BLK 235 Q 255 Q Vane motor MV BLK BLK 19 10 6 Troubleshooting flow When OPERATION INDICATOR lamp flashes 3 time Indoor fan does not operate Check of indoor fan motor Turn OFF the power supply Check connector CN211 visually No Y Yes Are soldered points of the No Reconnect the lead wires lt lt Are lead wires connected connector correctly soldered to Resolder it indoor power P C board Yes Disconnect the lead wires from connector CN211 on indoor power P C board Measure the resistance between lead wires No 1 and No 4 and then No 4 and No 7 Y Turn ON the power supply Rotate indoor fan slowly for 1 revo Is the resistance 0 short circuit or open circuit p lution or over with a screwdriver etc from air outlet and mea No sure the voltage No 2 and No 1 on CN121 Yes 0 or e others Replace the indoor fan motor lt t Does the voltage repeat 0V DC and 5V DC Y Yes Indoor terminal P C board Indoor power P C board
6. Vane angle is fixed to Horizontal position Horizontal position In HEAT operation Vane angle is fixed to Angle 4 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 6 Dew prevention During COOL or DRY operation with the vane angle at Angle 2 4 when the compressor cumulative operation time exceeds 1 hour the vane angle automatically changes to Angle 1 for dew prevention 11 ku l l l lD i ll 7 SWING 5 mode By selecting SWING mode with VANE CONTROL button the horizontal vane swings vertically 8 Cold air prevention in HEAT operation The horizontal vane position is set to Upward NOTE When 2 or more indoor units are operated with multi outdoor unit even if any indoor unit turns thermostat off this control doesn t work in the indoor unit 9 To change the air flow direction not to blow directly onto your body To change the air ONDES When to use this function flow direction COOL DRY HEAT Pressing and holding Use this function if you don t The air conditioner starts the The air conditioner starts heat VANE CONTROL want the air from the indoor cooling or drying operation ing operation approx 3 minutes button for 2 seconds unit to blow directly o
7. 5 second OFF Indoor coil thermistor Room temperature thermistor Upper lamp flashes 2 time flash 7 0000080800 2 5 second OFF Indoor fan motor Upper lamp flashes 3 time flash 00080808000 2 5 second OFF Upper lamp flashes 4 time flash eoeosoesooooosososoes Ld 2 5 second OFF Outdoor power system Upper lamp flashes 5 time flash 2 5 second OFF Outdoor thermistors Upper lamp flashes 6 time flash ee 2 5 second OFF Outdoor control system Upper lamp flashes 7 time flash eoe ososeoeososoooooes wapu NOUO Te EN 2 5 second OFF Other abnormality Upper lamp flashes 14 time flash ios osososo jos 0800000 Ld 2 5 second OFF Indoor unit and outdoor unit do not operate The serial signal from the outdoor unit is not received for 6 minutes Refer to 10 6 How to check mis wiring and serial signal error The indoor coil or the room temperature thermistor is short or open circuit Refer to 10 7 the characteristics of indoor coil thermistor and the room temperature thermistor The rotational frequency feedback signal is not emitted during the indoor fan operation e Refer 10 6 Check of indoor fan motor It cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor elect
8. C board and indoor fan motor Turn OFF the power supply Remove indoor fan motor connector CN211 from indoor power P C board and vane motor connector CN151 from the indoor electronic control P C board and turn ON the power supply Does the unit operate with the remote controller Does OPERATION INDICATOR lamp light up by pressing EMERGENCY OPERATION switch No Y Turn OFF the power supply Check both parts side and pattern Measure the resistance Refer to 10 5 of indoor fan motor Yes Short circuit Replace the indoor fan motor gt Refer to 10 5 Replace the varistor NR11 and fuse F11 EZ side of the indoor terminal P C board visually Be sure to check both the fuse and the varistor in any case Measure the resistance of the vane motor coil Are the varistor NR11 burnt V No and the fuse F11 blown Short circuit Replace the vane motor and the indoor electronic control P C board No Is the fuse F11 blown only Yes Measure the resistance of indoor fan motor Refer to 10 5 Is the resistance normal Yes Replace the fuse F11 Replace the fuse F11 and the indoor fan motor Please replace the fuse after removing the indoor terminal P C board from the electrical box P C board Measure the resistance of cement resistor R111 on the indoor power
9. cover Indoor electronic control P C board holder Catch of indoor electronic control P C board holder Photo 3 Catch of indoor electronic control P C board holder Terminal block Indoor terminal P C board Indoor power P C board Lower catch Upper catch 27 OPERATING PROCEDURE PHOTOS 4 Removing the vane motor Photo 4 1 Turn the breaker OFF Screws of the vane motor 2 Remove the panel Refer to 1 and the corner box 3 Remove the indoor electronic control P C board holder Refer to 2 4 Remove the screws of vane motor and remove the vane motor 5 Disconnect the connector from vane motor 5 Removing the indoor fan motor the indoor coil ther Photo 5 mistor and the line flow fan 1 Remove the panel Refer to 1 and the corner box 2 Remove the indoor electronic control P C board holder Refer to 2 and the electrical box Refer to 3 3 Remove the drain hose from the nozzle assembly and remove the nozzle assembly 4 Loosen the screw fixing the line flow fan 5 Remove the screws fixing the motor bed Lift the right side of motor bed a little and pull right to remove the fan motor together with motor band bed 6 Remove the indoor coil thermistor from the heat exchanger X 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
10. operate checked it can be checked with inTestRun operate normal EMERGENCY when failure mode recall function operation i even in operation in OPERATION EMERGENCY Test Run COOL or Switch is pressed OPERATION operation HEAT mode switch is pressed Test Run operation means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed Check room Refer to Referto Refer to 10 6 k wa Mus outdoor m nnecting wire emis meter mica fremde rant cone nana Refer to 10 7 compressor and irido r maser unit Refer to outdoor unit service manua Test point electronic control 2 E ia erue i eck of indoor ae LE P C board and indoor I fan motor Alllamps Upper lamp Upperlamp Upperlamp Upperlamp Upperlamp Upperlamp Upperlamp Flash on and off Flash on and off 2 time flash 3 time flash 4 time flash 5 time flash 6 time flash 7 timeflash 14 time flash at 0 5 second at 0 5 second Cause Cause Cause Cause Cause Cause Cause mena Wi ES Indoor unit Indoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Indoor unit indoor room temp Trouble of Trouble of file Outdoor Trouble of Trouble of Other i The horizontal Outdoor unit erature indoor fan indoor unit power thermistor outdoor abnormality vane is not Mis wiring indoor coil motor control system in ou
11. pen Then reattach the front lid or the like and then use the remote controller Cs f Insert the negative pole of the a batteries first Check if the polarity RESET button of the batteries is correct NOTE 1 If RESET button is not pressed the remote controller may not operate correctly 2 This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by the battery replacement 5 How to install the horizontal vane If horizontal vane is not installed correctly all of the operation indicator lamps will blink In this case install the horizontal vane correctly by following the procedures to NOTE Before installation of the horizontal vane turn OFF the power supply In procedure lock the stoppers until they click into place 14 10 2 Failure mode recall function Outline of the function This air conditioner can memorize the abnormal condition which has occurred once Even though LED indication listed on the troubleshooting check table 10 4 disappears the memorized failure details can be recalled This mode is very useful when the unit needs to be repaired for the abnormality which doesn t recur 1 Flow chart of failure mode recall function for the indoor outdoor unit Operational procedure The cause of abnormality cann
12. signal error indicated 6 minutes later Yes lt Check the power supply Check the wiring No Is there any mis wiring poor contact or wire disconnection of the indoor outdoor connecting wire No No Correct them Y A Y Turn OFF the power supply Check once more if the indoor outdoor B connecting wire is not mis wiring Short circuit outdoor terminal block S2 and 1 b Turn ON the power supply Y Does the LED on the inverter P C board or the outdoor electronic control P C board No repeat 3 6 second OFF and 0 8 second ON Light quick blinking 3 Yes Turn OFF the power supply Remove the short circuit between 3 not lighted 3 4 Mis wiring may damage indoor P C board during the operation Be sure to confirm the wiring is correct before the operation starts Be sure to check this within 3 minutes after turning ON After 3 minutes LED blinks 6 times Even when the inverter P C board or the outdoor electronic control P C board is normal LED blinks 6 times after 3 minutes Except for outdoor unit of multi system type Replace the inverter P C board or gt the outdoor electronic control P C board edor x2 Be careful to the residual voltage of smoothing capacitor outdoor terminal block S2 and S3 Turn ON the power supply Is there any error of the Is there amplitude
13. INDICATOR 79 Lighted Ret 2 9 Blinking COD Not lighted When indoor unit starts the operation while the defrosting of outdoor unit is being done it takes a few minutes max 10 minutes to blow out the warm air In the heating operation though indoor unit that does not operate may get warm or the sound of refrigerant flowng may be heard they are not malfunction The reason is that the refrigerant continuously flows into it 9 5 AUTO VANE OPERATION 1 Horizontal vane 1 Vane motor drive These models are equipped with a stepping motor for the horizontal vane The rotating direction speed and angle of the motor are controlled by pulse signals approx 12V transmitted from indoor microprocessor 2 The horizontal vane angle and mode change as follows by pressing VANE CONTROL button AUTO O 1 2 4 3 4 4 4 SWING 3 Positioning To confirm the standard position the vane moves until it touches the vane stopper Then the vane is set to the selected angle Confirming of standard position is performed in the following cases a When the operation starts or finishes including timer operation b When the test run starts c When standby mode only during multi system operation starts or finishes 4 VANE AUTO mode In VANE AUTO mode the microprocessor automatically determines the vane angle to make the optimum room temper ature distribution In COOL and DRY operation
14. MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS INDOOR UNIT SERVICE MANUAL Wireless type Models MSZ GC22VA MSZ GC22VA MSZ GC25VA MSZ GC25VA MSZ GC35VA MSZ GC35VA E1 E2 E1 E2 E1 E2 Changes for the Better Revision B E2 has been added Please void OBH468 REVISED EDITION A No OBH468 REVISED EDITION B Outdoor unit service manual MUZ GC VA Series OBH469 MXZ A VA Series OB377 MXZ 8A140A OC316 CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND 2 3 SPECIFICATION RR RR nn n 3 NOISE CRITERIA CURVES 4 5 OUTLINES AND DIMENSIONS 5 6 WIRING DIAGRAM 6 7 REFRIGERANT SYSTEM DIAGRAN 6 8 SERVICE FUNCTIONS 7 9 MICROPROCESSOR CONTROL 9 10 TROUBLESHOOTING nnn 14 11 DISASSEMBLY INSTRUCTIONS 26 PARTS CATALOG OBB468 NOTE RoHS compliant products have lt G gt mark on the spec name plate 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 Check of indoor fan motor has
15. Replace the indoor power terminal P C board and the indoor electronic control P C board Fuse F11 CN121 Varistor NT a NR11 L i CN211 Indoor unit operates by pressing EMERGENCY OPERATION switch but does not operate with the remote controller Check of remote controller and indoor electronic control P C board Check if the remote controller is exclusive for this air conditioner C Press OPERATE STOP ON OFF button on the remote controller p Y Is LCD display on the the remote No controller visible Y Yes Remove the batteries then set them back and press RESET button Refer to 10 1 4 Check if the unit operates with the remote controller Y Does the unit operate with the No Turn ON a radio to AM and press remote controller OPERATE STOP ON OFF button on the remote controller Y No Is noise heard from radio Replace the remote controller Y Yes Are there any fluorescent lights of Yes Reinstall the unit away from lights inverter or rapid start type within the range of 1m m Replace the indoor electronic control P C board Replace the batteries Refer to 10 1 4 not clear Attach a filter on receiving part including the receiver The unit does not operate with the remote controller Also OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch Check of indoor P
16. SZ GC25VA MSZ GC35VA 11 X 26 Oblong hole 11 X 20 Oblong hole 59 gt 2 E Wall hole 65 Installation plate Piping 295 reme Drain hose Air out A Gasline 49 52 0 43 m Flared connection 49 52 Drain hose Insulation 428 O D Connected 16 O D 58 19 o Insulation 1935 O D 5 line 46 35 0 5 m Flared connection 6 35 6 WIRING DIAGRAM MSZ GC22VA MSZ GC25VA MSZ GC35VA SYMBOL NAE FAN MOTOR 230V a gt FUSE jos e Ee irae m FAN MOTOR CONNECTING 63 VANE MOTOR ac oO Cm wm vow ROOM TEMP Eid INDOOR TERMINAL INDOOR POWER P C BOARD P C BOARD CN20A 10104 C T MAIN NOTES 1 About the outdoor side electric wiring THERMISTOR refer to the outdoor unit electric wiring 2 5 SUB diagram for servicing TIT CN151 SOLID STATE 2 Use copper conductors only For field wiring Ti sua SOLID STATE 3 Symbols indicate Terminal block Lasso CNIR1 INTERLOCK SOLID STATE a Connector 7 CNIRI SWITCH FAN aue mm emi o MEN TERMINAL BLOCK 7 REFRIGERANT SYSTEM DIAGRAM MSZ GC22VA MSZ GC25VA Unit mm MSZ GC35VA Refrigerant pipe 49 52 with heat insulator Flared connection Indoor coil 1 thermistor exchanger RT12 m
17. ain Indoor coil thermistor RT13 sub Room temperature thermistor RT11 Flared connection Refrigerant pipe 6 35 with heat insulator Refrigerant flow in cooling gt Refrigerant flow in heating 8 SERVICE FUNCTIONS MSZ GC22VA MSZ GC25VA MSZ GC35VA 8 1 TIMER SHORT MODE For service set time can be shortened by short circuit of JPG and JPS on the electronic control P C board The time will be shortened as follows Refer to 10 7 Set time 1 minute gt 1 second Set time 3 minute gt 3 second It takes minutes for the compressor to start operation However the starting time is shortened by short circuit of JPG and JPS 8 2 P C BOARD MODIFICATION FOR INDIVIDUAL OPERATION A maximum of 4 indoor units with wireless remote controllers can be used in a room In this case to operate each indoor unit individually by each remote controller P C boards of remote controller must be modified according to the number of the indoor unit How to modify the remote controller P C board Remove batteries before modification The board has a print as shown below NOTE For modification take out the batteries and press the OPERATE STOP ON OFF button twice or 3 times at first After modification put back the batteries then press the RESET button 185 The P C board has the print J1 and J2 Solder U1 and J2 according to the nu
18. been corrected Revision B E2 has been added 1 TECHNICAL CHANGES MSZ GA22VA m MSZ GC22VA E MSZ GA25VA MSZ GC25VA E MSZ GA35VA m MSZ GC35VA E 1 Indoor model has been changed MSZ GC22VA m MSZ GC22VA E MSZ GC25VA Em MSZ GC25VA E MSZ GC35VA m MSZ GC35VA E 1 Panel has been changed 2 PART NAMES AND FUNCTIONS MSZ GC22VA MSZA AIVA Air cleaning filter MSZ GC35VA Anti allergy enzyme filter option Air inlet Front panel Catechin air filter CEDENS CUN m Line flow fan Air outlet Vertical vane Remote controller Horizontal vane Remote control receiving section O 00 Emergency operation switch E O SW Operation indiget lamp MSZ GC22VA MSZ GC25VA MSZ GC35VA ACCESSORIES Installation plate Installation plate fixing screw 4 x 25 mm Remote controller holder Fixing screw for 3 5 x 1 6 mm Black Battery AAA for remote controller Wireless remote controller Felt tape Used for left or lef
19. e blinking does upper lamp of OPERATION INDICATOR lamp stay ON for 3 Yes Seconds Stays ON for 3 seconds without beep The outdoor unit is abnormal No The indoor unit is abnormal The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the indoor unit Check the blinking pattern and confirm the abnormal point with the failure mode table 10 2 2 outdoor unit failure mode table Refer to outdoor unit service manual Make sure to check at least two consecutive blinking cycles 2 Make sure to check at least two consecutive blinking cycles 33 Releasing the failure mode recall function k Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller Y Repair the defective parts Deleting the memorized abnormal condition 4 aAtter repairing the unit recall the failure mode again according to Setting up the failure mode recall function mentioned above Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above NOTE 1 Make sure to release the failure mode recall function once it s set up otherwise the unit cannot
20. e 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 cabinet the top panel and the P C board 3 When removing the P C board hold the edge of the board with care NOT to apply stress on the components 4 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X O TRS Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the abnormality indication is flashing on and off before starting service work 2 Before servicing check that the connector and terminal are connected properly 3 If the P C board is supposed to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 10 2 10 3 and 10 4 4 How to replace batteries Weak batteries may cause the remote controller malfunction In this case replace the batteries to operate the remote controller normally Remove the front lid and insert batteries Press RESET button with tip end of ball point
21. eries of the remote controller run down The unit will start and OPERATION INDICATOR lamp will light The first 30 minutes of operation is the test run operation This operation is for servicing The indoor fan runs at High speed and the system is in continuous operation The thermostat does not work After 30 minutes of test run operation the system shifts to EMERGENCY COOL HEAT MODE with a set temperature of 24 C The fan speed 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 Operation mode COOL HEAT Set temperature 24 C 24 C Fan speed Medium Medium Horizontal vane Auto Auto The operation mode is indicated by the Operation Y EMERGENCY OPERATION switch E O SW Indicator lamp on the indoor unit as following Operation Indicator lamp EMERGENCY COOL Lighted Not lighted EMERGENCY HEAT STOP 00 3 0 03 13 10 TROUBLESHOOTING MSZ GC22VA MSZ GC25VA MSZ GC35VA 10 1 Cautions on troubleshooting 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care of th
22. es Replace or repair the antenna Replace or repair the coaxial cable js Is the indoor outdoor Yes Extend the distance between connecting wire of the air the indoor outdoor connecting conditioner and the wiring of wire of the air conditioner and the antennas close the wiring of the antennas Even if all of the above conditions are fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit 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 situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and c
23. h OPERATION SELECT button 8 Press TEMPERATURE buttons TOO WARM or TOO COOL button to select the desired temperature The setting range is 16 31 C 1 Cold air prevention control When the compressor is not operating or is starting and the temperature of indoor heat exchanger and or the room tem perature is low or when defrosting is being done the indoor fan will stop or rotate in Very Low speed 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 high the high pressure protection works The indoor fan operates following the cold air prevention control This mode continues until the temperature of indoor heat exchanger falls 3 Defrosting Defrosting starts when the temperature of outdoor heat exchanger becomes too low The compressor stops once the indoor outdoor fans stop the 4 way valve reverses and the compressor re starts This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes 9 4 AUTO CHANGE OVER AUTO MODE OPERATION Once desired temperature is set unit operation is switched automatically between COOL and HEAT operation Mode selection 1 Initial mode When unit starts the operation with AUTO operation from off the room temperature is higher than the set temperature opera
24. heck for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the electromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise After checking the above consult the service representative 24 pn 10 7 Test point diagram and voltage MSZ GC22VA MSZ GC25VA MSZ GC35VA 1 Indoor power P C board Indoor terminal P C board Indoor terminal P C board Indoor power P C board Varistor NR11 Fuse F11 X RIN 6 N CN211 Terminal 230V AC block i T Connector to indoor electronic 5VDC 12VDC CN121 GND control P C board CN20A 9o Indoor fan motor gt Sar lo o Please replace the fuse after removing the indoor terminal P C board from the electrical box 2 Indoor electronic control P C board Timer short mode point JPG JPS Refer to 8 1 Indoor coil thermistor RT12 RT13 CN112 GND Interlock switch FAN CN1R1 7 Vane motor CN151 Room temperature thermistor RT11 dd Indoor coil thermistor RT12 RT13 Connector to Indoor power P C board CN10A Resistance kQ 5V Emergency operation switch E O SW SW1 Release of A
25. il thermistor the sub indoor coil thermistor 10 7 3 time flash 2 5 second OFF Serial signal The serial signal from outdoor unit is not received for 6 minutes Refer to 10 6 0 How to check mis wiring and serial signal error 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not sent out for 12 seconds after indoor fan motor is opeated Refer to 10 6 Check of indoor fan motor 12 time flash 2 5 second OFF Indoor control system It cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 4 16 mm 10 3 Instruction of troubleshooting Indoor unit operates operates ae ace OPERATION INDICATOR I Outdoor unit doesn t oesn receive a Outdoor unit the signal from lamp on the indoor unit is doesn t operate normally flashing and off remote controller operate m i E 3 If blinking of OPERATION Outdoor unit Outdoor unit Unit doesn t Indoor unit Indoor unit INDICATOR lamp cannot be operates only doesn t operate operates when doesn t
26. left side of the heat exchanger and pull out the line flow fan to the lower left Photo 7 Indoor coil thermistor main RT12 Indoor coil thermistor sub RT13 Screws of the motor bed a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Aug 2007 No OBH468 REVISED EDITION B 6 Distributed in Feb 2007 No OBH468 REVISED EDITION A 6 Distributed in Dec 2006 No OBH468 6 New publication effective Aug 2007 Made in Japan Specifications subject to change without notice
27. mber of indoor unit as shown in Table 1 After modification press the RESET button Table 1 1 unit operation 2 units operation 3 units operation 4 units operation No 1 unit No modification Same as at left Same as at left Same as at left No 2 unit Solder J1 Same as at left Same as at left No 3 unit Solder J2 Same as at left No 4 unit Solder both J1 and J2 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 the indoor unit once they are set The setting will be cancelled if the breaker is turned OFF or the power supply is shut down Please conduct the above setting once again after the power has restored 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 by the indoor electronic control P C board AUTO RESTART FUNCTION automatically starts operation in the same mode just before the shutoff of the main power Operation D If the main power has been cut the operation settings remain After the power is restored the unit restarts automatically according to the memory However it takes at least 3 minu
28. mp OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select COOL mode 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 1 Coil frost prevention The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting When the temperature of indoor heat exchanger becomes too low the coil frost prevention mode works The indoor fan operates at the set speed and the compressor stops This mode continues until the temperature of indoor heat exchanger rises 2 Low outside temperature operation When the outside temperature is lower low outside temperature operation starts and the outdoor fan slows or stops 9 2 DRY OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select DRY mode with OPERATION SELECT button 3 The set temperature is determined from the initial room temperature 1 Coil frost prevention Coil frost prevention is as same as COOL mode 9 1 1 2 Low outside temperature operation Low outside temperature operation is as same as COOL mode 9 1 2 9 3 HEAT 5 OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode wit
29. nto your approx 3 minutes after the after the vane has moved to the or more causes body vane has moved to the hori horizontal position the horizontal vane Depending on the shape of zontal position Sometimes the area to reverse and the room the air may blow When VANE CONTROL around your feet may not move to horizontal directly onto your body button is pressed again warm To warm the area position the vane returns to the around the feet set the Press VANE CONTROL previously set position horizontal vane to button again to return the and the air conditioner AUTO or the downward E vane to the previously set starts the cool or dry blowing position L position operation in approx Horizontal 3 minutes When VANE CONTROL position button is pressed again the vane returns to the previously set position and the air conditioner starts the heat operation in approx 3 minutes NOTE f you make the air flow not to blow directly onto your body by pressing VANE CONTROL button the compressor stops for 3 minutes even during the operation of the air conditioner The air conditioner operates with Very Low speed until the compressor turns on again 10 ECONO COOL 21 operation ECONOmical operation When ECONO COOL button is pressed in COOL mode set temperature is automatically 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 tem
30. of 10 to 20V DC No indoor outdoor connecting wire yes Replace the between indoor terminal block S2 such as the damage of the wire indoor outdoor and 937 lt Confirmation of serial intermediate connection poor connecting wire signal gt Is there rated voltage between ontact to the terminal block indoor terminal block S1 and S2 Confirmation of power voltage A Turn OFF inverter controlled lighting equipment Turn OFF the power supply and then turn ON again Press EMERGENCY OPERATION switch Yes Is there 2V DC or less between CN10A and JPG GND on the indoor electronic control P C board No Yes No Is there 2V DC or less between CN10A and JPG GND on the indoor electronic control Yes P C board error indicated Reinstall Is there 2V DC or less between either the CN10A and JPG GND unit or the on the indoor electronic control light each P C board Is serial signal other away Attach a filter No ee Yes 6 minutes later 5 Replace the indoor power Replace the indoor lt receiving terminal P C board electronic control P C board section of the indoor 7 7 unit Be sure to release the failure mode recall function after checking 22 When All lamps flash ON and OFF every 0 5 second Indoor unit and outdoor unit do not o
31. oil 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 indoor electronic control P C board holder from the nozzle and the electrical box right side 5 Remove the room temperature thermistor from the hook of the indoor electronic control P C board holder 6 Open the back side of the indoor electronic control P C board holder and remove the indoor electronic control P C board 7 Remove the room temperature thermistor from the indoor electronic control P C board Remove the indoor power P C board the indoor ter minal P C board and the electrical box 1 Turn the breaker OFF 2 Remove the panel Refer to 1 and the corner box 3 Remove the screw of V A clamp and then the indoor out door connecting wire 4 Remove the earth wire connected to the indoor heat exchanger from the electrical box 5 Unhook first the lower then the upper catches of the elec trical box and pull out the electrical box 6 Remove the screw of the electrical cover and remove the electrical cover 7 Disconnect all the connectors on the indoor power P C board and unhook all lead wires 8 Remove the screw of terminal block on the indoor terminal P C board 9 Remove the indoor power P C board and the indoor termi nal P C board Electrical box Screw of the electrical
32. operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized 2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 5 OFF interval p lt S second OFF Second interval gD yo OFF 7 gt MR 7 lt Beeps gt lt d Beeps gt Beeps Repeated cycle Repeated cycle i Repeated cycle 3 Blinking pattern when the outdoor unit is abnormal Blinking at 0 5 Blinking at 0 5 2 5 second OFF 3 second ON second interval 2 5 second OFF 3 second ON second interval E pe 4 amp Me 4 amp 7 OT mtF m wawqiy x de a cm OFF 4 lt gt 7 x No beep gt No beep gt a Repeated cycle j Repeated cycle Repeated cycle 15 2 Indoor unit failure mode table Upper lamp of OPERATION INDICATOR lamp Not lighted Abnormal point Failure mode Normal Condition Correspondence 1 time flash every 0 5 second Room temperature thermistor The room temperature thermistor short or open circuit is detected every 8 seconds during operation Refer to the characteristics of the room temperature thermistor 10 7 2 time flash 2 5 second OFF Indoor coil thermistor The indoor coil thermistor short or open circuit is detected every 8 seconds during operation Refer to the characteristics of the main indoor co
33. ot be found because the abnormality doesn t recur Setting up the failure mode recall function Turn ON the power supply lt Preparation of the remote controller gt While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button And release the other two buttons after all LCD in operation display section of the remote controller is displayed after 3 seconds Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 1 A MITSUBISHI ELECTRIC 3 1 Regardless of normal or abnormal condition a short beep is emitted once the signal is I received Does upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 No Indoor unit is normal seconds OFF But the outdoor unit might be abnormal because there are some Blinks Either indoor or outdoor unit is abnormal gt abnormalities that can t be recalled with this way Beep is emitted at the same timing Confirm if outdoor unit is abnormal according to the detailed outdoor as the blinking of upper lamp of unit failure mode recall function OPERATION INDICATOR lamp 2 Yes Judgment of indoor outdoor abnormality Blinks Befor
34. perate Check of installation of the horizontal vane Turn OFF the power supply Y Is the stopper of the horizontal vane No OFTE ra T 2 locked to the indoor unit correctly Refer to 10 1 5 Yes Y Turn ON the power supply No Are all lamps flashing Y To check the continuity of the interlock switch Fan measure the resistance of connector connected to CN1R1 on the indoor electronic control P C board Turn OFF the power supply Replace the interlock switch Fan Is there resistance 0 Q Replace the indoor electronic control P C board 23 F Electromagnetic noise enters into TV sets or radios No Is the unit earthed gt Earth the unit Is the distance between the antennas and the indoor unit within 3m or is the Extend the distance between Yes the antennas and the indoor the outdoor unit antennas and the outdoor unit within 3m Is the distance between the TV sets or radios and the Yes Extend the distance between indoor unit within 1m or is the TV sets and or radios and the distance between the TV the indoor unit or the TV sets distance between the l unit and or the antennas and sets or radios and the or radios and the outdoor unit outdoor unit within 3m Are the antennas damaged Is the coaxial cable damaged Is there any poor contact in the antenna wiring Y
35. perature 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 OPERATION 1 How to set the time 1 Check that the current time is set correctly NOTE Timer operation will not work without setting the current time Initially AM0 00 blinks at the current time display of TIME MONITOR so set the current time correctly with CLOCK SET button How to set the current time a Press the CLOCK set button b Press the TIME SET buttons gt and L4 to set the current time Each time FORWARD button is pressed the set time increases by 1minute and each time BACK WARD button lt is pressed the set time decreases by 1minute Pressing those buttons longer the set time increases decreases by 10 minutes c Press the CLOCK set button 2 Press OPERATE STOP ON OFF button to start the air conditioner 3 Set the time of timer ON timer setting START a Press ON TIMER button during operation b Set the time of the timer using TIME SET buttons gt J and LJ OFF timer setting a Press OFF TIMER button 22 during operation b Set the time of the timer using TIME SET buttons gt J and lt x Each time FORWARD button gt
36. ronic control P C board It consecutively occurs 3 times that the compressor stops for overcurrent protection or start up failure protection within 1 minute after start up Refer to How to check of inverter compressor Refer to outdoor unit service manual Check the stop valve The outdoor thermistors short or open circuit during the compressor operation Refer to Check of outdoor thermistor Refer to outdoor unit service manual It cannot properly read data in the nonvolatile memory of the inverter P C board or the outdoor electronic control P C board Replace the inverter P C board or the outdoor electronic control P C board Refer to outdoor unit service manual An abnormality other than above mentioned is detected Check the stop valve Confirm the abnormality in detail using the failure mode recall function for outdoor unit Outdoor control system Y Upper lamp lights Outdoor unit does not operate It cannot properly read data in the nonvolatile memory of the inverter P C board or the outdoor electronic control P C board 18 Check the blinking pattern of the LED on the inverter P C board or the outdoor electronic control P C board OPERATION INDICATOR NM Abnormal i point Operation indicator lamp Symptom Condition Correspondence All lamps flash at the same time Attachment Indoor uni
37. t of the 0 5 second ON and outdoor The electricity is not conducted to the interlock horizontal unit do not switch Fan of the horizontal vane vane operate 0 5 second OFF Refer to 10 6 Check of installation of the horizontal vane OPERATION INDICATOR s Cala m A a Vb Abnormal point MXZ type Upper lamp lights and lower lamp flashes Outdoor unit The operation mode of the each indoor aie i Operation eoooooeoooooes operates but unit is differently set to COOL includes DRY As opera ion mo e mode l indoor unit and HEAT at the same time the operation eter t outdoor unit service setting 2 5 second OFF does not mode of the indoor unit that has operated at manua operate first has the priority Operation indicator lamp Symptom Condition Correspondence 10 5 Trouble criterion of main parts MSZ GC22VA MSZ GC25VA MSZ GC35VA Part name Check method and criterion Room temperature thermistor RT 11 i i Refer to 10 7 Test point diagram and voltage ate a 2 Indoor electronic control P C board the chart of thermistor Measure the resistance with a tester Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Normal RC4V18 BA RC4V18 CA WHT BLK 273 Q 296 Q 308 Q 334 Q Indoor fan motor MF BLK RED 295 Q 320 Q 295 Q 320 Q INNER FUSE 25 320 135 3 CUT OFF 140 2 C CUT OFF
38. t rear piping 3 SPECIFICATION Indoor model MSZ GC22VA MSZ GC25VA MSZ GC35VA Function Cooling Heating Cooling Heating Cooling Heating Single phase 230V 50Hz Air flow Super High 576 600 576 600 552 570 Air flow High Med Low 462 354 246 480 378 276 462 354 246 480 378 276 444 330 234 462 354 246 Running current 1 0 22 Power input 1 40 Fan motor current 1 0 22 Model RC4V18 BA or CA Dimensions WxHxD 788x295x234 Weight 9 Air direction 4 Sound level Super High 43 Sound level High Med Low 36 29 21 36 29 22 Fan speed Super High 1 070 1 100 1 070 1 100 1 110 1 140 Power supply o 6 D Q lt lt lectrical Fan speed High Med Low 890 720 550 920 760 600 890 720 550 920 760 600 930 740 580 960 780 600 Fan speed regulator 4 Remote controller model KM05B NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 C Outdoor Dry bulb temperature 35 C Heating Indoor Dry bulb temperature 20 C Outdoor Dry bulb temperature 7 C Wet bulb temperature 6 C Refrigerant piping length one way 5m 1 Measured under rated operating frequency Specifications and rating conditions of main electric parts Fuse T3 15AL 250V Horizontal vane motor 12V DC Varistor S10K320ES3K1 ERZV14D471 Terminal block
39. tdoor control installed or trouble thermistor system abnormality unit system correctly of serial signal Refer to 10 6 Refer 10 6 Check room Refer to 10 6 Replace the Refer to Refer to Replace the Check Check of Howto temperature Check of indoor to check Check of inverter P C Flow chart of installation of check of thermistor indoor fan electronic inverter outdoor board or the detailed the horizontal mis wiring and indoor motor control compressor thermistors the outdoor outdoor unit vane and serial coil thermis P C board electronic failure mode signal error tor control recall function Refer to 10 7 board Test point diagram and i voltage 17 10 4 Troubleshooting check table Before taking measures make sure that the symptom reappears for accurate troubleshooting When the indoor unit has started operation and the following detection method has detected an abnormality the first detection after the power ON the indoor electronic control P C board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing OPERATION INDICATOR Abnormal point ee Lighted CX Blinking O Not lighted Operation indicator lamp Symptom Condition Correspondence Mis Wiring or serial signal Upper lamp flashes 0 5 second ON 60800080 0
40. tes for the compressor to start running How to release AUTO RESTART FUNCTION Turn off the main power for the unit Solder the jumper wire to JRO7 on the indoor electronic control P C board Refer to 10 7 Indoor electronic control P C board CN112 CN111 NOTE The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller f main power is turned OFF or a power failure occurs while AUTO START STOP timer is active the timer setting is cancelled f the unit has been off with the remote controller before power failure the auto restart function does not work as the power button of the remote controller is off To prevent breaker OFF due to the rush of starting current systematize other home appliance not to turn ON at the same time When some air conditioners are connected to the same supply system if they are operated before power failure the starting current of all the compressors may flow simultaneously at restart Therefore the 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 9 MICROPROCESSOR CONTROL MSZ GC22VA MSZ GC25VA MSZ GC35VA WIRELESS REMOTE CONTROLLER Signal transmitting section J Operation display section
41. tion starts in COOL mode If the room temperature is equal to or lower than the set temperature operation starts in HEAT mode 2 Mode change COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 2 degrees below the set temperature HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 2 degrees above the set temperature NOTE 1 If two or more indoor units are operating in multi system there might be a case that the indoor unit which is operating in AUTO cannot change over to the other operating mode COOL HEAT and becomes a state of standby Refer to NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER 10 Wa ss NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT MXZ series Multi system air conditioner can connect two or more indoor units with one outdoor unit Unit won t operate in case the total capacity of indoor units exceeds the capacity of outdoor units Do not connect indoor units beyond the outdoor unit capacity Operation indicator lamp flashes as shown in the figure below When you try to operate two or more indoor units with one outdoor unit simultaneously one for the cooling and the others for heating the operation mode of the indoor unit that operates earlier is selected The other indoor units cannot operate indicating as shown in the figure below In this case please set all the indoor units to the same operation mode OPERATION
42. uto restart function Solder the Jumper wire to JRO7 0 0 10 20 30 40 50 60 Refer to 8 3 Temperature 25 11 DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points gt The terminal which has the locking mechanism can be detached as shown below There 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 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Hold the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector MSZ GC22VA MSZ GC25VA MSZ GC35VA OPERATING PROCEDURE PHOTOS 1 Removing the panel Photo 1 1 Remove the screw caps of the panel Remove the screws 2 Hold the lower ends part of the panel and pull it slightly toward you and then remove the panel by pushing it upward Screws of the panel 26 OPERATING PROCEDURE PHOTOS 2 Removing the indoor electronic control P C board and 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 c
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