Home

Mitsubishi Electronics MUY-D36NA User's Manual

1.
2. MUZ D30NA PSIG 580 540 86 PSIG 2 500 ee 78 150 5 ave CF a e ture o 460 99 140 indoor DB tempera 86 2 420 D 2130 80 9 S 380 120 o c 2 70 340 110 7 300 100 260 90 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature MUZ D36NA PSIG 580 540 PSIG 2 500 6 o 9 460 140 rature F 86 tempe E 420 2 130 Indoor DB A o 8 9 380 g 120 75 300 100 260 90 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature MUY D30NA PSIG 580 540 Begs 500 74 5 SV o 460 e 140 ure CF 86 2 oe ok o indoor DB temperat 0 5 5 420 wee 2 130 80 5 9 8 380 2120 in 9 340 9 110 300 100 260 90 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature 13 MUY D36NA
3. aot 1 801 00000000 o 2 sider 2 eo GO wm GNESI ens 1 CN791 e 5 LJ HO D601 01 q ROT 6802 o oA o 0 PA Rees msn d i g CHS soo EL 000000000 su o Ress 8 6650665555 5 amp 5 4 4 DA792 4 Las 7 7 LALA Ss LIAS 36 681 High pressure switch 2 Noise filter board MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA CN901 To electronic CN902 CN903 control P C To power To power ea RED RI or TO OND
4. 100 700 pa 600 160 Ga s S 10 g 120 70 8 400 S 100 5 60 e E S 300 x 80 9 e 0 60 a 8 200 40 c g 40 pad 2 30 100 5 2 i 0 2 20 32 50 68 86 104 122 140 176 194 122 212 230 248 Q 9 320198 B61104122 140 158176 Temperature F 10 Temperature F E S 2 Lo 225 E 25 5 gt 4 14 32 50 68 86 104 c 5568 56 Temperature F 8S 8 5 25 23 SE 5 985 SG t9o 992 Tm o 2 59 902090 O35 5 p ES ob 555 286 s os 9 o 588 85 2 5 5 220 5 25585095550 527 0 gt 5 gt 8 el NS 92 522 gt 00 Boc a Ora 5 ag ONSS SE aEOO0LL 855 55 gt 5 52 22 56 A LA RS A 90922 0700025 45 p 2 ZET t L 9090 Ome Ss 2 O n ol 5 di o LED 1 GA Sey LED 2 2093 OT 9 0 20935 oec me ii oii Co CN801 N Reese 294 370 Gd 5 me VDC Input 18AL280V FUSE 3 15 250 CN601 o 208 230 VAC 60 Hz for indoor GIDH 5 Input 5 10 VDC As Ufs 28
5. PSIG 580 540 PSIG 2 500 PRP o g 460 140 F o mperature 9 r DB te 2 420 2130 o g 80 Q 380 2120 o c 8 110 340 2 300 100 260 90 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature Heating Data is based on the condition of outdoor humidity 75 Air flow should be set to High speed Data is for heating operation without any frost PSIG PSIG 500 150 480 75 140 70 460 65 440 130 420 5 120 5 400 380 o 110 2 5 8 D S 360 2 00 lt 5 340 8 2 8 320 5 90 5 300 B N 80 280 58 2 260 70 240 60 LA 220 200 50 14 20 25 30 35 40 45 50 55 60 6570 F 14 20 25 30 35 40 45 50 55 60 65 70 F Outdoor ambient temperature Outdoor ambient temperature PSIG PSIG 500 150 70 480 65 140 460 440 130 420 120 9 400 o 5 110 amp 360 8 3 E amp 100 os 5 340 S 5 E 58 3 320 5 90 9 300 o 80 280 b8Hz 260 70 240 60 220 200 50 14 20 25 30 35 40 45 50 55 60 6570 F 14 20 2
6. the distance between the antennas and Yes the outdoor unit within 9 91 8 2 Is the distance between the TV sets radios and the indoor unit within 3 28 Extend the distance between the TV sets and or ft or is the distance between the TV radios and the indoor unit or the TV sets or sets or radios and the outdoor unit Yes radios and the outdoor unit within 9 91 ft No Is the coaxial cable damaged Is there any poor contact in the anten gt Replace or repair the antenna n Yes Replace or repair the coaxial cable na wiring Is the indoor outdoor connecting wire of Extend the distance between the indoor outdoor the air conditioner and the wiring of the connecting wire of the air conditioner and the wir antennas close Yes ing of the antennas the antennas damaged 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
7. Confirm that 1 4 is normal Electrical circuit check 1 Contact of lead wire leading to compressor 2 Output voltage of the outdoor electronic control P C board and balance of them See 10 5 3 Direct current voltage to the outdoor electronic control P C board 4 Voltage between outdoor terminal block 1 2 Does the compressor run for 10 seconds or Check the refrigerant circuit more after it starts Yes Check the stop valve Ne After the compressor is heated with a drier does the compressor start x1 No Replace the compressor Yes 1 Heat the compressor with a drier for about 20 minutes Do not recover refrigerant gas while heating Compressor start failure Activate pre heat control Refer to 9 1 PRE HEAT CONTROL D Heating part When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit gets warm G Check of LEV Turn ON power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely Y Is click click sound heard Or do you feel vibration of the LEV coil with a hand Yes No Y Disconnect the connector CN795 Replace the outdoor electronic Is there normal resistance to LEV coil Yes control P C board No Replace the LEV coil 32 Unit cannot operate neither by the remote controller nor
8. 7 Screws of the cabinet Photo 2 Screw of the service panel Screws of the top panel 2 Set screws of the back panel Screws of the cabinet Screw of the valve cover OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly P C board and Photo 4 power board 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the following connectors lt Electronic control P C board gt CN931 and CN932 Fan motor CN795 LEV CN661 Discharge temperature thermistor defrost thermistor MUZ and outdoor heat exchanger temperature thermistor CN663 Ambient temperature thermistor CN681 High pressure switch MUZ A Discharge temperature lt Noise filter board gt thermistor CN912 4 valve 02 lt Compressor gt lt Reactor gt 4 Remove the screws fixing the relay panel 5 Remove the inverter assembly 6 Disconnect all connectors and lead wires on the electronic control P C board 7 Remove the electronic control P C board from the inverter assembly 8 Remove the screws fixing the power board assembly Photo 5 Inverter assembly 9 Disconnect all connectors and lead wires on the power board r Screws of the power board assembly 10 Remove the power board from the inverter assembly ZEE ad 11 Disconnect all connectors and lead wires on the noise filter P C board 12 Remove the
9. Turn OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 31 Miswiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the opera tion starts 3X3 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 Replace the inverter P C board or the outdoor electronic control P C board No Lighted 1 2 or not X2 Be careful to the residual lighted voltage of smoothing capacitor Is there any error of the in door outdoor connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block No Replace the indoor outdoor connecting wire A Turn ON the power supply OFF inverter controlled lighting Is there amplitude of 10 to 20 VDC equipment between outdoor terminal block 2 and Turn OFF the power supply and then S3 Confirmation of serial signal turn ON again Yes Press EMERGENCY OPERATION Switch 2 15 there rated voltage between Reinstall indoor terminal block 1 and S2 No either the unit lt Confirmation of power voltage gt Yes or the light each other away Is serial signal Is there any error of the in door outdoor
10. 190 5 ONTLOINNOD LINN 800011 101 zi 109 aseyd cal ADEC 800 SAYIM ONTLOINNOD LINA 800081 01 1309 aseud AOEC B0 AlddfS u3M0d 6 REFRIGERANT SYSTEM DIAGRAM MUZ D30NA Unit inch MUZ D36NA Oil Strainer Capillary tube separator 100 0 071 x I D 0 024 x 39 3 8 91 8 x 0 6 x 1 000 Refrigerant pipe 25 8 with heat insulator Service gt port Stop valve with service port Defrost gh pressure thermisto Ambient Switch RT61 RT65 Discharge Service emperature thermistor port RT62 Outdoor heat exchanger temperature thermistor RT68 Flared connection Strainer Receiver 100 R V coil heating Capillary tube es 272 X 1 0 0 094 L Refrigerant flow in cooling Refrigerant flow heatin 43 6 x 42 4 x 50 MUY D30NA Unit inch MUY D36NA Oil separator Capillary tube 7 oD x 0 0 024 Ambient Refrigerant pipe 05 8 X 99 with heat insulator 91 8 x 0 6 x 1 000 temperature RT65 Service gt port High pressure Switch Stop valve with service port Outdoor heat exchanger 4 temperature Service thermistor i port lt RT62 thermistor Compressor Flared connection LEV Strainer 100 m Stop valve Capillary tube Refrigerant
11. Air outlet Drain outlet Model MSZ D30NA MSY D30NA MSZ D36NA SPECIFICATION MSY D36NA Rated Minimum Maximum Cooling 441 Btu h 30 700 9 800 30 700 30 700 9 800 30 700 32 000 33 200 9 800 32 000 9 800 33 200 33 200 34 600 9 800 33 200 9 800 34 600 Heating 47 1 Btu h 32 600 8 700 34 000 35 200 8 700 36 000 Capacity Rated Heating 17 2 Btu h 20 800 22 800 Power consumption Rated Minimum Maximum TOTAL Cooling 1 W 3 850 620 3 850 3 380 620 3 380 4 140 4 360 620 4 140 620 4 360 4 210 4 240 620 4 210 620 4 240 Heating 47 1 W 3 360 520 3 600 3 840 520 4 100 Power consumption Rated Heating 17 2 2 620 3 000 EER 3 amp 1 SEER 3 Cooling 8 0 14 5 9 1 16 0 7 7 7 6 14 5 7 9 8 2 15 1 HSPF IV V 4 Heating 8 2 8 2 COP Heating 1 2 84 2 69 Outdoor unit model MUZ D30NA MUY D30NA MUZ D36NA MUY D36NA External finish Munsell 3Y 7 8 1 1 Power supply phase Hz 208 230 1 60 Max fuse size time delay A 25 Min circuit ampacity A 21 Fan motor 0 93 Compressor TNB220FMCHT 16 20 Refrigerant control Liner expansion valve Sound level 1 Cooling 55 55 56 He
12. EMERGENCY OPERATION switch Indoor unit does not operate OPERATION INDICATOR lamp flashes ON and OFF in every 0 5 seconds Outdoor unit doesn t operate H How to check miswiring and serial signal error OFF the power supply D Is there rated voltage in the power supply y Yes Turn ON the power supply Is there rated voltage between outdoor terminal block S1 and 2 Check the power supply Check the wiring Press EMERGENCY OPERATION switch once y Does the left lamp of OPERATION INDICA TOR lamp light up lt Confirmation of the power to the indoor unit gt Yes Y s serial signal error indicated 6 minutes later Yes No Is there miswiring poor contact or wire disconnec tion of the indoor outdoor Correct them No Yes connecting wire Is fuse F65 broken No lt Y A Y Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not miswiring Short circuit outdoor terminal block S2 and S3 X1 Y Turn ON the power supply Outdoor electronic control P C board Parts side Y LED2 LED1 Does the LED on the inverter P C board or MOM the outdoor electronic control P C board repeat 3 6 second OFF and 0 8 second ON quick blinking Yes IN IN Lighted Blinking
13. No When RT64 is abnormal replace the outdoor power board Reconnect the connector of thermistor Turn ON the power supply and press EMERGENCY OPERATION switch y the unit operate for 10 minutes i without showing thermistor abnormality Yes OK Cause is poor contact No Replace the outdoor power board Thermistor Connector Pin No Board Defrost MUZ Between 661 1 and 2 Discharge temperature Between CN661 pin3 and pin4 Outdoor heat exchanger temperature Between CN661 and pin8 Ambient temperature Between CN663 pin1 and pin2 Outdoor electronic control P C board Fin temperature Between CN3 pin1 and pin2 29 Outdoor power board The cooling operation or heating operation does not operate Check of R V coil MUZ D30 36 Heating operation does not work 1 Disconnect the lead wire leading to the compressor 2 3 minutes after turning on the power supply start EMERGENCY OPERATION in HEAT mode Y Is there voltage of 208 230 VAC between pin1 off power supply of indoor and outdoor unit and discon 2 at connector CN912 X No nect the connector CN781 in the outdoor electronic control P C Yes board Y 2 3 minutes after turning ON the power supply start EMER Turn OFF power supply of indoor and outdoor unit
14. Outdoor electron ic control board the chart of thermistor Discharge tem perature thermistor RT62 Fin temperature thermistor RT64 Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Refer to 10 6 Test point diagram and voltage 1 Outdoor electron ic control board the chart of thermistor Measure the resistance between terminals using a tester Winding temperature 14 104 F 10 40 C Normal 1 24 1 53 Outdoor motor Measure the resistance between lead wires using a tester Part temperature 14 104 F 10 40 C Color of lead wire RED BLK BLK WHT WHT RED Normal 13 160 V MUZ Measure the resistance using a tester Part temperature 14 104 F 10 40 C Normal 1 20 1 55 Linear expansion valve Measure the resistance using a tester Part temperature 14 104 F 10 40 C Color of lead wire WHT RED RED ORN YLW BRN BRN BLU 27 YLW BRN BLU E 10 5 TROUBLESHOOTING FLOW OPERATION INDICATOR lamp flashes 5 times Outdoor unit does not operate How to check inverter compressor ing on the power supply start EMERGENCY OPERATION After the outdoor fan starts running wait for 1 minute m
15. 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 lever Slide the sleeve Pull the terminal while pushing the locking 2 The terminal with this connector has the locking mechanism Hold the sleeve and pull out the terminal slowly Connector MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA OPERATING PROCEDURE 1 Removing the cabinet 1 Remove the screws of the service panel 2 Remove the screws of the top panel 3 Remove the screw of the valve cover 4 Remove the service panel 5 Remove the top panel 6 Remove the valve cover 7 Remove the screws of the cabinet 8 Remove the cabinet 9 Remove the screws of the back panel 10 Remove the back panel Photo 3 Screw of the motor support li j Conduit plate Screws of the back panel j amp Set screws of the back panel Photo 1 Screw of 77 the top Z9 panel d 4 4 4 4 4 Screws 6 gt of the cabinet S
16. 65 Low ambient Cooling Steady State at minimum compressor Speed 80 67 67 53 5 Intermediate Cooling Steady State at Intermediate compressor Speed 5 89 67 87 69 Standard Rating Heating at rated compressor Speed 40 60 43 Low temperature Heating at rated compressor Speed 60 ue 19 Max temperature Heating HSPF_ at minimum compressor Speed 2 32 62 Heating High temperature Heating Bh 70 60 47 at minimum compressor Speed Frost Accumulation 70 60 35 at rated compressor Speed Frost Accumulation at Intermediate compressor Speed 5 70 60 35 5 At Intermediate compressor Speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed Voltage 208 230 V Min 187 208V 230 253 Outdoor unit 1 phase 60 Hz 2 OPERATION Intake air temperature F Condition Indoor Outdoor WB DB Standard temperature 67 95 Maximum temperature 73 Minimum temperature 57 14 Maximum humidity Standard temperature 60 47 Heating Maximum temperature 67 75 Minimum temperature 60 14 Cooling 4 OUTLINES AND DIMENSIONS MUZ D30NA Unit inch MUZ D36NA MUY D30NA MUY DAONA REQUIRED SPACE Open as n 20 inch or more if the front and both sides are open 20 9 32 11 25 32 4 in
17. 9 1 PRE HEAT CONTROL If moisture gets into the refrigerant cycle or when refrigerant is liquefied and col lected in the compressor it may interfere the start up of the compressor To improve start up condition the compressor is energized even while it is not CDU operating ed 9 sp This is to generate heat at the winding compressor uses about 50 W when pre heat control is turned ON _ p Pre heat control is ON at initial setting 09 D ee How to activate pre heat control Bie 8 1 Turn OFF the power supply for the air conditioner before making the setting ug Sa 2 Set the 2nd Dip Switch of SW1 on the outdoor electronic control P C board to le ON to activate pre heat control function The compressor is energized even while it is not operating This is to generate heat at the winding to improve the compressor s start up condition 1 1 1 1 ON 1 1 Compressor ON OFF Outside temperature 68 F 20 C T 30min H5min 30min H5min 30min OFF i i Breaker Start Stop When outside operation operation temperature is above 68 F 20 C 1 Pre heat control is turned ON for 15 or 30 min after the breaker is tur
18. Check of LEV 5 times Goes out High pressure protection The outdoor heat exchanger temperature exceeds 158 F 70 C during cooling or indoor gas pipe temperature exceeds 158 F 70 C during heating MUZ Check around of gas and the refrigerant circuit Check of stop valve 8 times Goes out Converter protection A failure is detected in the operation of the converter during operation Replace the power board Goes out Bus bar voltage protection 1 The bus bar voltage exceeds 400 V or falls to 200 V or below during compressor operating Bus bar voltage protection 2 The bus bar voltage exceeds 400 V or falls to 50 V or below during compressor operating Replace the power board 13 times Goes out Outdoor fan motor Failure occurs continuously three times within 30 seconds after the fan gets started Refer to 10 5 Check of outdoor fan motor Lighting 8 times Current sensor protection A short or open circuit is detected in the current sensor during compressor operating Replace the power board Lighting 11 times Communication between P C boards protection Communication error occurs between the outdoor electronic control P C board and power board for more than 10 sec onds Check the connecting wire between outdoor elec tronic control P C board and power board Lighting 12 times Zero cross detecting circuit p
19. GENCY OPERATION in HEAT mode meets the Is there voltage 12 VDC be Replace the dedionig or In noise tikter tween the connector CN781 P C board Is there normal Replace in and pin 3 No control P C board pin 5 and pin resistance to coil 7 es Replace the noise filter P C board Yes Replace the 4 way valve Cooling operation does not work 1 Disconnect the lead wire leading to the compressor x If the connector CN912 is not 2 3 minutes after turning on the power supply start EMERGENCY connected or R V coil is open OPERATION in COOL mode voltage occurs between terminals even when the control is OFF Is there voltage of 208 230 VAC between 1 2 at connector CN912 X No Replace the 4 way valve 1 Turn OFF power supply of indoor and outdoor unit and disconnect the connector CN781 in the outdoor electronic control P C board 2 3 minutes after turning ON the power supply start EMER GENCY OPERATION in COOL mode Is there voltage 12 VDC between the connector CN781 pin 5 and pin 3 No Replace the noise filter P C board Yes Replace the outdoor electronic control P C board 30 Fan motor does not operate or stops operating shortly after starting the operation Check of outdoor fan motor Check the connection between the
20. istor A short or open circuit is detected in the thermistor during operation Refer to 10 5 Check of outdoor thermistor Replace the outdoor electronic control P C board Lightning 5 times Ambient temperature thermis tor A short or open circuit is detected in the thermistor during operation Outdoor heat exchanger temperature thermistor A short circuit is detected in the thermistor during operation or an open circuit is detected in the thermistor after 5 minutes in cooling and 10 minutes in heating MUZ of compressor start up Defrost thermistor MUZ A short circuit is detected in the thermistor during operation or an open circuit is detected in the thermistor after 5 minutes of compressor start up Refer to 10 5 Check of outdoor thermistor Lightning 6 times Serial signal The communication fails between the indoor and outdoor unit for 3 minutes Refer to 10 5 8 How to check miswiring and serial signal error Lightning 7 times Nonvolatile memory data The nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board Lightning 8 times Current sensor Current sensor protection stop is continuously performed twice Replace the power board Lightning 11 times Communication error between P C boards The communication protection stop between boards is con tinuously performed twice Ch
21. Check of LEV 6 time flash High pressure Lighting Lighting The outdoor heat exchanger temperature exceeds 158 F 70 during cooling or the indoor gas pipe temperature exceeds 158 F 70 C during heating MUZ Check refrigerant circuit and refrigerant amount Check the stop valve 7 flash Fin temperature Goes out he fin temperature exceeds 189 F 87 during opera tion P C board temperature 4 times Goes out board temperature exceeds 158 F 70 C during peration Check around outdoor unit Check outdoor unit air pas sage Refer to 10 5 outdoor fan motor of 8 time flash Outdoor fan motor Lighting Lighting ailure occurs continuously 3 times within 30 seconds fter the fan gets started Refer to 10 5 outdoor fan motor of 9 time flash Nonvolatile memory data Lighting 5 times Nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board 10 time flash Discharge temperature Lighting Lighting The frequency of the compressor is kept 80 Hz or more and the discharge temperature is kept under 102 F 39 C for more than 20 minutes Check refrigerant circuit and refrigerant amount Refer to 10 5 LEV of 11 time flash Communication error between P C boards Lighting 6 tim
22. OND 660000 o 9 0 00 54425 2 920 T Boo 2 oo or o oJ 5 Ld Wi 9 BET o D0901 4 2 0 MUZ 9 0 912 PL o E Bes 8 R V obo L 208 230 VAC Eze 5 60 2 ai g 2 Output al Sa E gt 6 9 o 4 00000000 O O Ore eaters mi o 00000 n OLO O joie d 5 000020 208 230 VAC 60 Hz Output AW PTC65 T2AL250V 64 FUSE 2A 250V 37 NR64 VARISTOR m 3 MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 000 090000009056 02149 Connect to the compressor Voltage among phases 180 V OS Connect to the earth 294 370 VDC Output Red CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5 VDC pulse wave 2 5 Zero cross signal 3 4 Not used 6 5 15 7 5 15 V CN3 Fin temperature thermistor RT64 reception From electronic control P C board 5 VDC pulse wave CN5 Primary current detection Connect to the noise filter 38
23. button on remote controller BWN 17 8 ACTUATOR CONTROL MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 8 1 OUTDOOR FAN MOTOR CONTROL The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running 5 seconds 15 seconds ON y Compressor OFF ON 8 2 R V COIL CONTROL lt 07 gt Heating mS ON Cooling SCR VE e SA ee OFF e e m ne OFF NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor COOL HEAT 5 seconds 5 seconds R V coil ON ON or H Outdoor fan ON C cn motor OF 8 3 Relation between main sensor and actuator Actuator Sensor Purpose Outdoor Indoor Compressor fan motor fan motor Discharge temperature thermistor Protection Cooling Coil frost prevention Heating High pressure protection Indoor coil temperature thermistor Defrost thermistor Defrosting Fin temperature thermistor Protection Outdoor heat exchanger temperature Protection Ambient temperature thermistor Cooling Low ambient temperature operation 18 9 SERVICE FUNCTIONS MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA
24. conditioner be sure to turn OFF the main unit first with the remote controller then after con firming 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 electronic control P C board 3 When removing the electrical parts be careful to the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X I 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 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 Refer to 10 2 and 10 3 20 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 ta
25. connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block No Replace the indoor outdoor connecting wire Attach a filter on remote control receiving error indicated 6 minutes later Be sure to release the failure mode recall fun after checking section of the indoor unit 33 Replace the indoor electronic control P C board ction operation frequency does go up from lowest frequency Check of HPS 2 Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF Check the resistance between each terminal Infinity Replace HPS 00 2 Disconnect the connector CN681 in the electronic control P C board 5 681 Turn power supply to the indoor and outdoor unit 3 minutes later start EMERGENCY OPERATION Y Is HPS protection displayed immediately after Replace the outdoor electronic compressor starts Yes control P C board No 34 J Electromagnetic noise enters into TV sets or radios amp Is the unit grounded No gt Ground the unit Is the distance between the antennas and the indoor unit within 9 91 ft or is Extend the distance between the antennas and gt the indoor unit and or the antennas and the
26. connector CN931 and CN932 Is the resistance between each ter minal of outdoor fan motor normal Yes Refer to 10 4 Disconnect CN932 from outdoor electronic control board and turn on the power supply Rotate the outdoor fan motor manually and measure the voltage of CN931 Between 1 and 5 Between 2 and 5 Between 3 and 5 Y Fixed to either 5 or 0 VDC Does the voltage between each terminal become 5 VDC No N and 0 VDC repeatedly yes lt Does the outdoor motor rotate smoothly Yes Y Replace the outdoor DC fan motor Replace the outdoor electronic control P C board Outdoor unit does not operate No E Check of power supply Check the connecting of parts of main power supply circuit y Turn ON power supply y Is there voltage of 208 230 VAC in the power supply terminal block No Check the power supply cable Yes y C 22 he nose MENE E No Replace the noise filter P C board Yes Is the input voltage to the power board 208 230 VAC No Replace the reactor Yes Y Is the input voltage to the outdoor electronic Replace the power board lt control P C board 294 325 VDC No 715601062 the power board Yes Replace the outdoor electronic control P C board 7 Check of compressor start failure
27. falls to 200 V or below during compressor operating Bus bar voltage 2 Even if this protection stop is performed continuously 3 times it does not mean the abnormality in outdoor power system 6 times Goes out The bus bar voltage exceeds 400 V or falls to 50 V or below during compressor operating 24 Replace the power board 10 3 TROUBLESHOOTING CHECK TABLE MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Indication Symptom LED1 Red LED2 Yellow Abnormal point Condition Condition Correspondence Outdoor unit does not oper ate Lightning Outdoor power system IPM protection stop or lock protection stop is continuously performed three times within 1 minute after the compressor gets started or converter protection stop or bus bar voltage protection stop is continuously performed 3 times within 3 minutes after start up Check the connection of the compressor connect ing wire Refer to 10 5 How to check inverter compres sor Refer to 10 5 Check of compressor start failure Check the stop valve Lightning Discharge temperature therm istor A short circuit is detected in the thermistor during opera tion or an open circuit is detected in the thermistor after 10 minutes of compressor start up Refer to 10 5 Check of outdoor thermistor Lightning 4 times Fin temperature thermistor P C board temperature therm
28. noise filter P C board from the inverter assembly 37 Screws of the reactor Removing R V coil MUZ 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the following connectors lt Noise filter P C board gt CN912 4 way valve Screws of the relay panel 3 Remove the R V coil Photo 9 Photo 6 Screws of the relay panel Propeller OPERATING PROCEDURE PHOTOS 4 Removing the defrost thermistor MUZ discharge Photo 7 temperature thermistor outdoor heat exchanger temperature thermistor and ambient temperature exchanger thermistor temperature 1 Remove the top panel cabinet service panel and the back thermistor panel Refer to 1 2 Disconnect the following connectors lt Electronic control P C board gt CN661 Discharge temperature thermistor defrost therm istor MUZ and outdoor heat exchanger tem Ambient perature thermistor temperature CN663 Ambient temperature thermistor thermistor 3 Pull out the defrost thermistor from its holder Photo 7 MUZ 4 Pull out the discharge temperature thermistor from its hold er Photo 4 5 Pull out the outdoor heat exchanger temperature thermistor from its holder Photo 7 6 Pull out the ambient temperature thermistor from its holder Photo 7 Outdoor heat Defrost thermistor for MUZ Removing outdoor fan motor 1 Remove the top panel cabinet service panel and the back panel R
29. pipe 43 8 9D 0 152 x 0 094 with heat insulator 43 6 62 4 x 50 gt Refrigerant flow in cooling 9 SSS MAX REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Refrigerant piping ft Piping size O D in Model Max Length Max Height difference A B Liquid MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 100 50 3 8 Indoor unit Max Height difference B Max length A Outdoor unit ADDITIONAL REFRIGERANT CHARGE R410A oz Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation Outdoor unit Refrigerant piping length one way ft precharged 40 50 60 70 80 Model MUZ D30NA MUZ D36NA 4 Ib 10 oz 8 88 Calculation X oz 7 2 96 5 oz ft x Refrigerant piping length ft 25 Outdoor unit Refrigerant piping length one way ft Model precharged 40 50 80 MUY D30NA MUY D36NA 4 Ib 3 24 Calculation X oz 1 08 5 oz ft x Refrigerant piping length ft 25 NOTE Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation 7 DATA MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 7 1 PERFORMANCE DATA 1 COOLING CAPACITY Indoor air Outdoor intake air DB temperature F IWB 85 95 105 SHC TPC SHC TPC TC SHC 71 17 8 3 75 16
30. 5 37 yd 5 5 32 E 3 5 E E 3 0 amp 33 a a 28 31 3 26 E 65 75 85 95 105 115 E 65 75 85 95 105 115 E 65 75 85 95 105 115 Outdoor intake air DB temperature F Outdoor intake air DB temperature F Outdoor intake air DB temperature F MUY D36NA SHF at rating condition 0 62 Airflow 763 Total capacity Total power consumption 65 75 85 95 105 115 Outdoor intake air DB temperature F Heating MUZ D30NA MUZ D36NA Airflow 848 CFM Airflow 848 CFM 48 65 70 43 ae ea 75 er 38 pre EE 33 x 83 os 3 a Sm a 8 8 x BS 23 ex 9 8 8 45 F 75 ature C 70 S 44 em 65 a ex 88 8g 37 5 82 7 peer 2 8 8 5 ait S 15 25 35 45 55 15 25 35 25 55 Outdoor intake air WB temperature F Outdoor intake air WB temperature F This value of frequency is not the same as the actual frequency in operating Refer to 7 5 and 7 6 for the relationships between frequency and capacity 12 7 3 CONDENSING PRESSURE Cooling Data is based on the condition of indoor humidity 50 Air flow should be set to High speed
31. 5 30 35 40 45 50 55 60 6570 F Outdoor ambient temperature Outdoor ambient temperature 14 7 4 STANDARD OPERATION DATA MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA Cooling Heating Cooling Heating Cooling Cooling Capacity 30 700 32 600 32 000 33 200 35 200 30 700 33 200 34 000 SHF 0 64 0 62 0 64 0 62 Input 3 85 3 36 4 14 4 36 3 84 3 38 4 21 4 24 Rated frequency 84 84 91 91 79 92 Electrical circuit Indoor unit MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA Power supply 208 230 1 60 Input 0 058 Fan motor current 0 45 0 42 Outdoor unit MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Power supply 208 230 1 60 Input 3 792 3 302 4 082 4 302 3 782 3 322 4 152 4 182 Comp current 17 25 15 56 14 95 13 46 18 65 17 86 17 25 15 56 15 05 13 56 18 95 17 26 Fan motor current 0 80 0 72 Refrigerant circuit Condensing pressure 468 404 480 420 453 475 Suction pressure 126 96 122 94 125 119 Discharge temperature 186 8 169 7 198 7 168 8 191 3 197 1 Condensing temperature 126 5 114 3 128 5 117 0 123 8 127 4 Suction temperature 45 5 29 8 48 0 29 1 54 7 48 6 Comp shell bottom temperature 175 6 156 4 187 0 155 7 177 4 182 7 Ref p
32. 7 4 04 15 6 MUZ D30NA 67 21 2 3 56 19 6 3 85 18 3 63 24 0 3 41 22 3 3 68 20 3 71 18 5 4 25 17 4 4 58 16 2 MUZ D36NA 67 22 2 4 03 20 6 4 36 19 1 63 25 3 3 86 23 5 4 16 21 4 71 17 8 3 30 16 7 3 55 15 6 MUY D30NA 67 21 2 3 13 19 6 3 38 18 3 63 24 0 2 99 22 3 3 23 20 3 71 18 5 4 10 17 4 4 42 16 2 67 22 2 3 89 20 6 4 21 19 1 63 25 3 3 73 23 5 4 02 21 4 71 19 3 4 13 18 1 4 45 16 8 67 23 2 3 92 21 5 4 24 20 0 63 26 3 3 75 24 5 4 05 22 3 NOTE 1 IWB Intake air wet bulb temperature Total Capacity x10 Btu h SHC Sensible Heat Capacity x10 Btu h TPC Total Power Consumption kW 2 SHC is based on 80 of indoor Intake air DB temperature 2 COOLING CAPACITY CORRECTIONS Refrigerant piping length one way ft 25 std 40 65 MUY D36NA 208 V MUY D36NA 230 V MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 3 HEATING CAPACITY Indoor air Outdoor intake air WB temperature F IDB 35 43 75 3 28 3 44 1 0 MUZ D30NA 70 3 19 3 36 65 3 11 3 28 75 3 74 3 94 MUZ D36NA 70 3 65 3 84 65 3 55 3 74 NOTE 1 IDB Intake air dry bulb temperature TC Total Capacity x10 Btu h TPC Total Power Consumption kW 2 Above data is for heating
33. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS OUTDOOR UNIT SERVICE MANUAL R410A No OBH502 Wireless type Models MUZ D30NA MUZ D30NA MUZ D36NA MUZ D36NA MUY D30NA MUY D36NA Indoor unit service manual MSZ D NA Series OBH501 MSY D NA Series OBH501 c CONTENTS 1 TECHNICAL CHANGES 3 2 PART NAMES AND FUNCTIONS 3 3S PECIFIC ATION hoher nets 4 CL eu SS 4 OUTLINES AND DIMENSIONS 6 SS 5 WIRING 7 SS 6 REFRIGERANT SYSTEM DIAGRAM 9 SS 11 SS 8 ACTUATOR 18 SS 9 SERVICE FUNCTIONS 19 SS 10 TROUBLESHOOTING eenn 20 SS 11 DISASSEMBLY INSTRUCTIONS 39 SS SS PARTS CATALOG OBB502 TM NOTE RoHS compliant products have lt G gt mark on the spec name plate 1 TECHNICAL CHANGES MUZ D30NA MUZ D30NA MUZ D36NA MUZ D36NA MUY D30NA MUY D36NA 1 New model 2 PART NAMES AND FUNCTIONS MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Air inlet back and side Drain hose nn IN
34. YOLLOVdVO 00 5 189 108845 JUIN 9N1133NN0 LINN 800011 SdH cOLNO E leo 56191031 2031 19900 99 ae 0014 5 12 SAYIM 911309 LINN 800011 cal 00 80 ONTLOINNOD LINA 800081 01 06 CTENI 1309 A0 c 806 AlddfS u3M0d MUY D30NA MUY D36NA 11214185 20 GUPITA 91132319 IUN J00pur ay 0 299 BUTIIM 21212919 APIS 00pu ay nOqV SILON 12019 180139 TT S OQUAG BULJINA 10 2npuoJ 2901002 85070 HOLSTWUJHI 4 1 7914 311004 H3MOd 1 3911131 1 41 0161 1 74431 429 2510 90918 HOLIMS 38055384 SdH AV 138 79 80151538 154 311004 H3MOd 1N3911131NI O 60H YAWYOSSNVYL ONTHOLIMS 1081 43911041405 8012 4 HIMOd A0Sc1VST 181 3503 T084 329018 IWNIWYSL 481 YOLSTYVA A056 IVE 91 35 594 32018 IVNINH3I 831114 3SION A052 1Vc1 3513 793 40151534 8 VLEBH YOLOW NVJ 80119 74 9 AJ 40151534159 79214 HOSSIUJWOJ 83 44045 81 1 344002 1919 8015 1 4831 H3ONVHOX3 1 8000110 8919 3 NOISNVdX3 83 44045 81 IN3UHf2 27119 HOLSTWUIHL dW31 SOLU Jg012V3d 1 YOLTOVdVO 9NIHIOO0NS 182 JAVN 108845 108845 108845 8914 6914 5914 SdH 0019
35. aded 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 operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized X2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 2 5 second second interval 2 5 second OFF second interval lt lt l 93 hr dS CUPS _ Beeps Beeps Beeps Repeated cycle Repeated cycle Repeated cycle at 3 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 lt gt lt gt lt gt lt gt lt gt lt No beep Beeps gt 4 OFF O_O 4 4 4 Repeated cycle Repeated cycle Repeated cycle 2 Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal Confirm if outdoor unit is abnormal according to the following procedures Y Confirm that the remote controller is in the failure mode recall function With the rem
36. ating 57 57 Defrost method Reverse cycle Reverse cycle Dimensions 33 1 16 D 13 H 33 7 16 Weight Ib 141 Remote controller Wireless type Control voltage by built in transformer 12 24 VDC Refrigerant piping Not supplied Refrigerant pipe size Min wall thickness Liquid 3 8 0 0315 Gas 5 8 0 0394 Connection method Indoor Flared Outdoor Flared Between the indoor amp outdoor units Height difference 50 Piping length 100 Refrigerant charge R410A 4 Ib 10 oz 4 10 oz Refrigeration oil Model NOTE Test conditions are based on ARI 210 240 NE022 1 Rating conditions Cooling Indoor 80 67 FWB Outdoor 95 FDB 75 FWB Rated frequency 2 Hening Indoor 70 60 FWB Outdoor 47 43 FWB Rated frequency Indoor 70 60 FWB Outdoor 17 15 FWBMaximum frequency Test condition 3 344 Indoor air condition Outdoor air condition Dry bulb F Wet bulb F Dry bulb F Wet bulb F Test A Cooling Steady State at rated compressor Speed B 2 Cooling Steady State at rated compressor Speed SEER 1 Cooling Steady State Cooling at minimum compressor Speed 80 67 95 75 80 67 82 65 80 67 82
37. ble 10 3 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 This figures show about MSZ type Operational procedure The cause of abnormality cannot be found because the abnormality doesn t recur Setting up the failure mode recall function Y Turn ON the power supply Preparation of the remote controller 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 Y 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 Y 3X1 Regardless of normal or abnormal condition a short beep is emitted once the signal is received Does the left lamp of OPERATION INDICATOR lamp on the Indoor unit is normal indoor unit blink at the interval of 0 5 seconds But the outdoor unit might be abnormal because there are some abnor Blinks Either indoor or outdoor unit is abnormal Beep is emit No malities that can t be recalled with this way ted at the same timing as the blinking of the
38. ch or more 8 inch or more if there are obstacles 4 to both sides In Mors D V n Air out 4 3 0x13 16 slot 19 11416 gt Open as rule 3 3 16 33 1 16 20 inch or more if the back both sides and top are open WA 33 7 16 7 2 En Sg LAS Liauid 3 8 i Gas 15 8 W N WIRING DIAGRAM MUZ D30NA MUZ D36NA 11215185 10 WEIGRTP BUTJIN 21112218 JOOPUT 34 0118101 43014 180139 TT S OQUAS C plats 510121102 19000 es Q BULJIM 21112212 APIS 100011 34 i1noqy SILON 1109 01083105 JATWA 9NISU3A3U 7510 YOLSIWYJH1 dW3l 394 9519 6914 97000 d3MOd 1N39T1131NI 9X HOLSIWGIHL 1508430 1918 HOLIMS 38055389 SdH YAWYOSSNVYL ONTHOLIMS 1081 840151534 7 158 311004 d3MOd 1N39IT131NI 0 62H 39018 lVNIWBH3I 8311081 02 801593 HIMOd 0501 51 61 35014 1084 138 1109 1083105 HOLSTUVA AOS TVE 91 3503 S94 80151534 8 VLE6H 4391113 3510 AOGE Wel JSN 234 40151534199 79214 YOLSTWYIHL 4431 H39NVHOX3 1 8000110 80104 NV 84055384402 0112 4 9 AJ 439 3035 31 LNSYYND 1915 YOLSIWYSHL IN3ISNV 015 1 7919 108445 JAVA NOISNVdX3 40152933 8918 6914 1914 108445 5918 u3NH03SNVHl 1 384012 07119
39. e 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 operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized X2 Blinking pattern when 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 Beeps Repeated cycle Beeps Repeated cycle 22 Turn OFF the power supply and turn it again Release the failure mode recall function accord Press RESET button of the remote controller ing to the left mentioned procedure 4 OFF 4 lt gt e r 4 47 4 CUPS NO CUP CPS Repeated cycle 3 Outdoor unit failure mode table MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA LED indication Outdoor P C board The left lamp of OPERA TION INDICATOR lamp Indoor unit Abnormal point Failure mode protection LED 1 LED 2 Condition Correspondence Indoor outdoor unit failure mode recall function Non Normal 2 time flash Outdoor power system Lighting Lighting IPM protection stop or lock protection stop is continuously performed 3 times within 1 minute after the compres sor gets started or converter protection stop or bus bar voltage pr
40. eck the connecting wire between outdoor elec tronic control P C board and power board Lightning 12 times Zero cross detecting circuit The protection stop of the zero cross detecting circuit is continuously performed 10 times Check the connecting wire among outdoor elec tronic control P C board noise filter P C board and power board Outdoor unit stops and restarts 3 minutes later is repeated Goes out IPM protection Overcurrent is detected after 30 minutes of compressor start up Lock protection Overcurrent is detected within 30 minutes of compressor start up Reconnect compressor connector Refer to 10 5 How to check inverter compres sor Refer to 10 5 Check of compressor start failure Check the stop valve Check the power module PAM module Goes out Discharge temperature protec tion Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C less 3 minutes later Check the amount of gas and refrigerant circuit Refer to 10 5 Check of LEV Goes out Fin temperature protection The fin temperature exceeds 189 F 87 during operation P C board temperature pro tection The board temperature exceeds 158 F 70 during operation Check refrigerant circuit and refrigerant amount Refer to 10 5
41. efer to 1 Photo 8 Screws of the outdoor fan motor 2 Disconnect the following connectors A lt Electronic control P C board gt Propeller CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the outdoor fan motor 5 Remove the outdoor fan motor OPERATING PROCEDURE PHOTOS 6 Removing the compressor and 4 way valve Photo 9 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Remove the inverter assembly Refer to 2 3 Remove the coil Refer to 3 4 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 5 Detach the welded part of the suction and the discharge pipe connected with compressor Photo 9 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the welded part of 4 way valve and pipe Photo 8 R V coil Welded part of the discharge pipe Welded part of the suction pipe 7 Removing the reactor 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor 43 SLIM a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Feb 2008 No OBH502 7 New publication effecti
42. es Communication error occurs between the electronic control P C board and power board for more than 10 seconds The communication between boards protection stop is continuously performed twice Check the connecting wire between outdoor electronic control P C board and power board Current sensor Lighting 7 times A short or open circuit is detected in the current sensor during compressor operating Current sensor protection stop is continuously performed twice Replace the power board Zero cross detecting circuit 5 times Goes out Zero cross signal cannot be detected while the compres sor is operating The protection stop of the zero cross detecting circuit is continuously performed 10 times Check the connecting wire among electronic control P C board noise filter P C board and power board NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 3 23 The left lamp of OPERA TION INDICATOR lamp Indoor unit Abnormal point Failure mode protection LED indication Out door P C board LED 1 LED 2 Condition Correspondence Indoor outdoor unit failure mode recall function 11 time flash Converter 5 times Goes out A failure is detected in the operation of the converter dur ing operation Bus bar voltage 1 5 times Goes out The bus bar voltage exceeds 400 V or
43. indoor outdoor wiring grounding wire antennas wiring from antennas receiver Electric field intensity of the broadcast station affected by the electromagnetic noise Presence or absence of amplifier such as booster 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 check 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 elec tromagnetic 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 35 10 6 TEST POINT DIAGRAM AND VOLTAGE 1 Outdoor electronic control P C board MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Fin temperature thermistor RT64 Outdoor heat exchanger temperature thermistor RT68 Discharge temperature thermistor RT62 200 Defrost thermistor RT61 Ambient temperature thermistor RT65
44. ipe length Refrigerant charge R410A 4 Ib 10 oz Indoor unit 80 70 80 80 80 Intake air temperature 67 60 67 67 67 53 53 7 51 7 Discharge air temperature 53 52 1 52 8 50 8 Fan speed High 1 1 Airflow High 741 Wet 738 Wet 718 Wet 710 Wet Outdoor unit 95 95 95 95 Intake air temperature Fan speed Airflow 15 7 5 CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ D30NA Correction of Cooling capacity 1 5 1 0 0 5 Input correction factors Capacity correction factors qm 0 50 100 150 Hz The operational frequency of compressor MUZ D36NA Correction of Cooling capacity 1 5 1 0 0 5 Capacity correction factors Input correction factors 0 50 100 150 Hz The operational frequency of compressor MUY D30NA Correction of Cooling capacity 1 5 1 0 0 5 Capacity correction factors a Input correction factors T 0 50 150 Hz The operational frequency of compressor MUY D36NA Correction of Cooling capacity 1 5 1 0 0 5 Capacity correction factors i Input correction factors 0 50 100 150 Hz The operational frequency of compressor Correction of Cooling total input 1 5 1 0 0 5 Capacity correction factors 0 50 100 150 Hz Correction of Cooling
45. left lamp OFF Confirm if outdoor unit is abnormal according to the detailed outdoor of OPERATION INDICATOR lamp 32 unit failure mode recall function Refer to 10 2 2 Yes Judgment of indoor outdoor abnormality Before blinking does the lamp of OPERATION INDICA TOR lamp stay ON for 3 seconds Stays ON for 3 seconds without beep Yes The outdoor unit is abnormal E o 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 Refer to indoor unit service manual outdoor unit failure mode table Refer to 10 2 3 Make sure to check at least two consecutive blinking cycles 2 Make sure to check at least two consecutive blinking cycles 3 Releasing the failure mode recall function p 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 After 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 he
46. ned ON 2 30 min after the unit is stopped pre heat control is turned ON for 15 or 30 and turned OFF for 30 min This is repeated as shown in the graph until the breaker is turned OFF When outside temperature is 68 F 20 C or below pre heat control is ON for 30 min When outside temperature is 70 F 21 C or above pre heat control is ON for 15 min NOTE When the unit is started with the remote controller pre heat control is turned OFF Compressor uses 50 W when pre heat control is turned ON 9 2 CHANGE IN DEFROST SETTING Changing defrost finish temperature 1 Turn OFF the power supply for the air conditioner before making the setting 2 Set the 4th Dip Switch of SW1 on the outdoor electronic control P C board to ON to change the defrost finish temperature Refer to 10 6 1 9 s 2 4th Dip Switch of SW1 __ Defrost finish temperature gQ ee Karte 49 5 F 9 7 cC ole he SA OFF Initial setting ON 64 9 F 18 3 C 19 10 TROUBLESHOOTING MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 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 miswiring 2 Take care of the following during servicing 1 Before servicing the air
47. operation without any frost How to operate with fixed operational frequency of the compressor 1 Press the EMERGENCY OPERATION switch on the front of the indoor unit and select either EMERGENCY COOL mode or EMERGENCY HEAT mode before starting to operate the air conditioner The compressor starts with operational frequency The fan speed of the indoor unit is High This operation continues for 30 minutes In order to release this operation press the EMERGENCY OPERATION switch twice or once or press any button on the remote controller aR 11 7 2 PERFORMANCE CURVE Cooling MUZ D30NA MUZ D36NA MUY D30NA SHF at rating condition 0 64 SHF at rating condition 0 62 SHF at rating condition 0 64 Airflow 763 CFM Airflow 763 CFM Airflow 763 CFM 40 40 38 38 36 36 gt 25 In S232 Ind 32 Soor ga ga 8 30 ke 8 S 30 ake S9 28 N 71 se BS 28 WB to N 71 B X 67 P X 67 Ure 4 63 ture 63 24 24 F c 5 8 8 45 Y 40 43 5 Bi rg 71 2 ape 5 5 pe 67 Q 44 owe 63 2 8 62 SS 39 5 9 34 xe 8s ant 8 8 miria
48. ore before measuring the voltage output voltage values have the tolerance of 20 96 Eu the terminal of the compressor 3 minutes after m Measure the voltage between each lead wire leading to the compressor U BLK V WHT V WHT W RED W RED U BLK Is voltage output on right table Y Is output balanced Y Is the input voltage to the outdoor electronic control P C board 370 V or more yes Replace the power board Turn off power supply of indoor and outdoor unit and measure the compressor winding resistance between the compressor terminals No Is the resistance between each terminal normal Replace the compressor pes Reconnect the lead wire of compressor and turn on power supply to indoor and outdoor unit 3 minutes later starts EMERGENCY OPERATION Clarify the causes by counting time until the inverter stops 0 to 10 seconds compressor rare short 10 to 60 seconds compressor lock 60 seconds to 5 minutes refrigerant circuit defective 5 minutes or more normal 28 OPERATION INDICATOR lamp flashes 6 times Thermistor is abnormal Check of outdoor thermistors Gee the connector of thermistor in the outdoor P C board S below table and measure the resistance of thermistor Y Is the thermistor normal Refer to 10 6 1 Yes Replace the thermistor except RT64
49. ote controller headed towards the indoor unit press TOO COOL or TOO WARM button to adjust the set temperature to 77 F 25 C Does left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 seconds Blinks The outdoor unit is abnormal Beep is emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp 2 x1 Regardless of normal or OFF abnormal condition 2 short beeps are emitted as the signal is received Yes Blinks The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the out door unit failure mode table 10 2 3 Make sure to check at least two consecutive blinking cycles 2 The outdoor unit is rmal Releasing the failure mode recall function Release the failure mode recall function by the following procedures Y Repair the defective parts Deleting the memorized abnormal condition After repairing the unit recall the failure mode again according to Setting up the failure mode recall function 10 2 1 9 Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 9 Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing th
50. otection stop is continuously performed 3 times within 3 minutes after start up Check the connection of the compressor connecting wire Refer to 10 5 How to check inverter compressor Refer to 10 5 Check of compressor start failure Check the stop valve 3 time flash Discharge temperature thermistor Lighting Once Defrost thermistor MUZ Lighting Once Ambient temperature thermistor Lighting Twice Fin temperature thermistor Lighting 3 times P C board temperature thermistor Lighting 4 times Outdoor heat exchanger tempera ture thermistor Lighting 9 times Thermistor shorts or opens during compressor running Refer to 10 5 Check of outdoor thermistors Replace the outdoor electronic control P C board Refer to 10 5 Check of outdoor thermistors 4 time flash Overcurrent 28 A current flow into intelligent power module Reconnect compressor con nector Refer to 10 5 How to check inverter compressor Refer to 10 5 Check of compressor start failure Check the stop valve 5 time flash Discharge temperature Lighting Lighting Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 10 5
51. rotection Zero cross signal cannot be detected while the compressor is operating NOTE 1 The location of LED is illustrated at the right figure Refer to 10 6 1 2 LED is lighted during normal operation OFF 2 5 second OFF Check the connecting wire among outdoor elec tronic control P C board noise filter P C board and power board Outdoor electronic control P C board Parts side 0 5 second ON 2 5 second OFF The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Example When the flashing frequency is 2 25 LED2 LED1 V V Lighting 0 5 Symptom Indication LED1 Red LED2 Yellow Abnormal point Condition Condition Correspondence Outdoor unit oper ates Once Lighting Primary current protection The input current exceeds 15 A Secondary current protection The current of the compressor exceeds 15 A Lig High pressure protection MUZ The indoor gas pipe temperature exceeds 113 F 45 C dur ing heating Defrosting in cooling The indoor gas pipe temperature falls 37 F 3 C or below during cooling These symptoms do not mean any abnormality of the product but check the following points Check if indoor fil ters are clogged Check if refrigerant is short Check if indoor outdoor unit air circulation is short cycled 3
52. times Lig Discharge temperature protec ion The discharge temperature exceeds 212 F 100 C during operation Check refrigeran circuit and refrigerant amount Refer to 10 5 Check of LEV Refer to 10 5 Check of outdoor thermistors Low discharge temperature protection The frequency of the compressor is kept 80 Hz or more and the discharge temperature is kept under 102 F 39 C for more than 20 minutes Refer to 10 5 Check of LEV Check refrigeran circuit and refrigerant amount 5 times Cooling high pressure protec ion The outdoor heat exchanger temperature exceeds 136 F 58 during operation This symptom does not mean any abnormality of Check if indoor fil the product but check the following points ters are clogged Check if refrigerant is short Check if indoor outdoor unit air circulation is short cycled Outdoor unit oper ates 9 times Inverter check mode The unit is operated with emergency operation switch Lighting Normal 26 EEE 10 4 TROUBLE CRITERION OF MAIN PARTS MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Part name Check method and criterion Defrost thermistor RT61 MUZ Ambient temperature thermistor RT65 Outdoor heat ex changer temperature thermistor RT68 Measure the resistance with a tester Refer to 10 6 Test point diagram and voltage 1
53. total input 1 5 1 0 0 5 Capacity correction factors 0 100 150 Hz Correction of Cooling total input 1 5 1 0 0 5 0 50 100 150 The operational frequency of compressor Correction of Cooling total input 15 1 0 0 5 0 50 100 150 The operational frequency of compressor 16 e a a e a Correction of Heating capacity 0 5 0 100 Correction of Heating capacity 0 5 0 100 150 Hz The operational frequency of compressor The operational frequency of compressor 150 Hz The operational frequency of compressor The operational frequency of compressor Correction of Heating total input 1 5 o Input correction factors o a 0 50 100 150 Hz The operational frequency of compressor Correction of Heating total input o Input correction factors o a 0 50 100 150 Hz The operational frequency of compressor 7 6 TEST RUN OPERATION How to operate fixed frequency operation Press EMERGENCY OPERATION switch to COOL or HEAT mode COOL Press once Press twice Test run operation starts and continues to operate for 30 minutes Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode Indoor fan operates at High speed After 30 minutes test run operation finishes and EMERGENCY OPERATION starts Operation frequency of compressor varies cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any
54. ve Feb 2008 Made in Japan Specifications subject to change without notice

Mitsubishi Electronics MUY-D36NA User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents