Mitsubishi Electric MSC-CA20VB Service Technical Manual Download Page 150

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150

MXZ MICROPROCESSOR CONTROL

12-1. INVERTER SYSTEM CONTROL

MXZ-2A30/40/52VA

12-1-1. Inverter main power supply circuit

POWER P.C. BOARD

Power
supply

INVERTER P.C. BOARD

R64A R64B

CT61

TR821

DB65

X64

L61

L62

C63A

C63B

C63C

DB61

L64

CT761

CT781

IPM

Booster chopper circucuit

SYMBOL

IPM

C63A/C63B/C63C

CT761/CT781

CT61

DB61

R64A, R64B

X64

DB65

TR821

L64

NAME

INTELLIGENT POWER MODULE

SMOOTHING CAPACITOR

CURRENT TRANSFORMER

DIODE MODULE

CURRENT-LIMITING RESISTOR

RELAY

DIODE MODULE

SWITCHING POWER TRANSISTOR

REACTOR

FUNCTION

It supplies three-phase AC power to compressor.

It stabilizes the DC voltage.

It measures the current of the compressor motor.

It measures the value of current which is supplied to the main power

supply circuit.

It converts the AC voltage to DC voltage.

It absorbs the rush current not to run into the main power supply circuit

when the electricity turns ON.

It short-circuits the resistance which restricts rush current during the

normal operation after the compressor startup.

Booster

chopper

circuit

Function of main parts

It improves power factor.

It rectifies AC and controls its voltage.

MXZ-2A30VA MXZ-2A52VA MXZ-4A71VA MXZ-5A100
MXZ-2A40VA MXZ-3A54VA MXZ-4A80VA

SYMBOL

IPM

CB1~3

CT1~2

CT61

PFC

R64A, R64B

X64

NAME

INTELLIGENT POWER MODULE

SMOOTHING CAPACITOR

CURRENT TRANSFORMER

REACTOR

POWER FACTOR CONTROLLER

CURRENT-LIMITING RESISTOR

RELAY

FUNCTION

It supplies three-phase AC power to compressor.

It stabilizes the DC voltage.

It measures the current of the compressor motor.

It measures the current of the main power supply circuit.

It rectifies AC, controls its voltage and improves the power factor of

power supply.

It restricts rush current with the resistance.

It short-circuits the resistance which restricts rush current during the

compressor operates.

Function of main parts

IPM

CB3

CB2

+CB1

PFC

CT61

N/F

CT2

CT1

X64

R64A/R64B

POWER

SUPPLY

POWER BOARD

P. C. BOARD

FILTER

NOISE

MXZ-3A54VA
MXZ-4A71/80VA
MXZ-5A100VA

OBT06D--5qxp 07.3.2 10:09 AM Page 150

Summary of Contents for MSC-CA20VB

Page 1: ...TYPE AIR CONDITIONERS SPLIT TYPE HEAT PUMP AIR CONDITIONERS FLOOR AND CEILING TYPE AIR CONDITIONERS FLOOR TYPE HEAT PUMP AIR CONDITIONERS MSC CA VB MU GA VB MSC CB VB MUH GA VB MSC GA VB E E E E E MXZ A VA E MCF GA VB MUCF GA VB MCFH GA VB MUCFH GA VB MFZ KA VA E E E E E MS GA VB MU GA VB MSH CA VB MSH CB VB MSH GA VB MUH GA VB MSZ CA VB MUZ CA VB MSZ FA VA MUZ FA VA MUZ FA VAH MSZ GA VA MUZ GA VA...

Page 2: ...OPERATION 19 2 4 FAN OPERATION 19 2 5 INDOOR FAN MOTOR CONTROL 19 2 6 AUTO VANE OPERATION 19 2 7 TIMER OPERATION 22 2 8 EMERGENCY TEST OPERATION 23 2 9 EXPANSION VALVE CONTROL LEV CONTROL 24 2 10 FUNCTION OF SOFT START RELAY 25 3 MSH MICROPROCESSOR CONTROL 26 Indoor unit models Outdoor unit models MSH CA50VB MSH GA50VB MUH GA50VB MSH CB50VB MSH GA60VB MUH GA60VB MSH GA80VB MUH GA80VB 3 1 I FEEL CO...

Page 3: ...NDOOR FAN MOTOR CONTROL 59 5 6 OUTDOOR FAN MOTOR CONTROL 59 5 7 AUTO VANE OPERATION 59 5 8 i see CONTROL OPERATION 61 5 9 AREA SETTING 62 5 10 PLASMA DUO OPERATION 64 5 11 AUTO FRONT PANEL 65 5 12 TIMER OPERATION 65 5 13 EMERGENCY TEST OPERATION 66 5 14 INVERTER SYSTEM CONTROL 67 5 15 OPERATIONAL FREQUENCY CONTROL OF OUTDOOR UNIT 69 5 16 EXPANSION VALVE CONTROL LEV CONTROL 70 6 MSZ GA MSZ CB MICRO...

Page 4: ... 103 7 4 FAN OPERATION 103 7 5 AUTO VANE OPERATION 103 7 6 TIMER OPERATION 105 7 7 EMERGENCY TEST OPERATION 105 8 MCFH MICROPROCESSOR CONTROL 106 Indoor unit models Outdoor unit models MCFH GA35VB MUCFH GA35VB MCFH GA50VB MUCFH GA50VB MCFH GA60VB MUCFH GA60VB 8 1 I FEEL CONTROL OPERATION 106 8 2 COOL OPERATION 110 8 3 DRY OPERATION 111 8 4 HEAT OPERATION 111 8 5 AUTO VANE OPERATION 111 8 6 TIMER O...

Page 5: ...ONTROL 141 11 6 OUTDOOR FAN MOTOR CONTROL 142 11 7 AUTO VANE OPERATION 142 11 8 TIMER OPERATION 144 11 9 EMERGENCY TEST OPERATION 145 11 10 INVERTER SYSTEM CONTROL 145 11 11 OPERATIONAL FREQUENCY CONTROL OF OUTDOOR UNIT 147 11 12 EXPANSION VALVE CONTROL LEV CONTROL 148 12 MXZ MICROPROCESSOR CONTROL 150 Outdoor unit models MXZ 2A30VA MXZ 2A40VA MXZ 2A52VA MXZ 3A54VA MXZ 4A71VA MXZ 4A80VA MXZ 5A100V...

Page 6: ...t temperature is obtained This shows that the room temperature is approaching the target temperature Operation state Indication Operation Indicator Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state INDOOR UNIT DISPLAY SECTION The following indication does not depend on the shape of lamp 1 1 COOL OPERATION 1 Press OPERATE STOP ON OFF...

Page 7: ...e in dry mode 2 Indoor fan speed control Indoor fan operates at the set speed by FAN SPEED CONTROL button In Auto fan speed becomes Low 3 The operation of the compressor and indoor outdoor fan MU GA20 GA25 GA35VB MUH GA20 GA25 GA35VB MUX 2A28 2A59 3A60 3A63 2A70 4A73VB Compressor operates by room temperature control and time control Indoor fan and outdoor fan operate in the same cycle as the compr...

Page 8: ...ifference between room temperature and set tem perature during operation Operation time chart Example Thermostat Indoor fan Outdoor fan Compressor ON ON OFF OFF OFF OFF OFF ON ON ON ON ON ON OFF OFF OFF 2 Cold air prevention control 1 When the compressor is not operating 1 if the temperature of indoor coil thermistor RT12 is 0 C or less the fan stops 2 if the temperature of indoor coil thermistor ...

Page 9: ... mode of I FEEL CONTROL Initial room temperature MUH type 25 or more 23 or more less than 25 less than 23 MU MUX type 25 or more more than13 less than 25 1 5 I FEEL CONTROL OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select I FEEL CONTROL mode with the OPERA TION SELECT button 3 The operation mode is determined by the initial...

Page 10: ... called Fuzzy control and works only in I FEEL CONTROL mode In DRY mode of I FEEL CONTROL the set temperature doesn t change To raise the set temperature 1 2 degrees C To lower the set temperature 1 2 degrees C 4 The initial set temperature is decided by the initial room temperature 1 5 1 COOL mode of I FEEL CONTROL 1 Thermostat control Thermostat control is as same as COOL OPERATION 1 1 1 2 Indoo...

Page 11: ...ashes on and off to show the fan motor abnormality 1 7 AUTO VANE OPERATION 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 the VANE CONTROL button 3 Positio...

Page 12: ...to 21 C 18 C to 20 C 17 C to 18 C 15 C to 17 C 15 C or less 5 8 11 14 17 20 23 Horizontal blow time sec 20 17 14 11 8 2 23 8 ECONO COOL operation ECONOmical operation When the ECONO COOL button is pressed in COOL mode set temperature is automatically set 2 C higher Also the horizontal vane swings in various cycle according to the temperature of indoor heat exchanger RT12 SWING operation makes you ...

Page 13: ... in the following cases or the set time may deviate and other malfunctions may occur A power failure occurs The circuit breaker functions 1 9 EMERGENCY TEST OPERATION In case of test run operation or emergency operation use EMERGENCY OPERATION switch on the front of the indoor unit Emergency operation is available when the remote controller is missing has failed or the batteries of remote controll...

Page 14: ...N OPEN OFF CLOSE ON CLOSE OFF OPEN SOLENOID VALVE INDOOR UNIT MC1 MC2 MF61 21R3 21R4 21RB COMPRE SSOR OUTDOOR FAN MOTOR A ON OFF OFF B ON ON OFF OFF ANY UNIT ON OFF ON OFF ON ON OFF OFF C ON OFF ON OFF OFF ON OFF ON OFF ON OFF ACTUATOR ON OFF ON OFF ON CLOSE OFF OPEN ON OPEN OFF CLOSE ON OPEN OFF CLOSE SOLENOID VALVE MUX 2A28VB INDOOR UNIT MC MF 21R BALANCE 21R1 21R2 COMPRE SSOR OUTDOOR FAN MOTOR ...

Page 15: ...TOO COOL VANE MODE ECONO COOL STOP START HR MIN WIDE VANE LONG I FEEL COOL DRY PM CLOCK AM RESET CLOCK OPERATION SELECT button FAN SPEED CONTROL button OFF TIMER button HR button MIN button TIME SET button ON TIMER button RESET button ECONO COOL button VANE button Horizontal vane button CLOCK SET button LONG button WIDE VANE button Vertical vane button ON OFF TOO COOL PM AM TOO WARM FAN Signal tra...

Page 16: ...4 The initial set temperature is decided by the initial room temperature 1 When the system is restarted with the remote controller the system operates with the previous set temperature regard less of room temperature at restart The set temperature is calculated by the previous set temperature 5 TEMPERATURE buttons In I FEEL CONTROL mode set temperature is decided by the microprocessor based on the...

Page 17: ...ning Time counting also stops temporarily when the indoor fan speed becomes High or the room temperature exceeds 26 C However when two of the above conditions b and c are satisfied again Time accumulation is resumed Compressor Outdoor fan OFF ON continuously at set speed Indoor fan ON ON OFF Operation chart Example 4 Discharge temperature protection MU GA80VB The compressor is controlled by the te...

Page 18: ...room temperature control and time control Set temperature is controlled to fall 2 C from initial room temperature Indoor fan and outdoor fan operate in the same cycle as the compressor When the room temperature is 23 C or over When the thermostat is ON the compressor repeats 8 minutes ON and 3 minutes OFF When the thermostat is OFF the compressor repeats 4 minutes OFF and 1 minute ON When the room...

Page 19: ...p flashes on and off to show the fan motor abnormality AUTO Horizontal 1 2 3 4 5 Middle Downward Swing 2 6 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 an...

Page 20: ...at Vane Angle 4 or 5 when the compressor cumulative operation time of compressor exceeds 1 hour the vane angle automatically changes to Angle 1 for dew prevention 7 SWING MODE By selecting SWING mode with VANE button the horizontal vane swings vertically The remote controller displays SWING mode is cancelled when VANE button is pressed once again 3 Positioning The vane presses the vane stopper onc...

Page 21: ...he swing operation is performed in table G H for quick cooling Also after 10 minutes when the difference of set temperature and room temperature is more than 2 the swing opera tion is performed in table D H for more cooling The air conditioner repeats the swing operation in various cycle as follows Temperature of Tp w 1 more than 24 C 5 2 Downward blow time second 22 C to 24 C 21 C to 22 C 20 C to...

Page 22: ... 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 3 Press ON OFF TIMER buttons to select the operation ON TIMER button AUTO START operation ON timer OFF TIMER button AUTO STOP operation OFF timer 4 Press HR and MIN button to set the timer Time...

Page 23: ...tes of test run operation the system shifts to EMERGENCY COOL MODE with a set temperature of 24 C The fan speed shifts to Med speed The coil frost prevention works even in emergency operation In the test run or emergency operation the horizontal vane operates in VANE AUTO mode Emergency operation continues until EMERGENCY OPERATION switch is pressed again or the unit receives any signal from the r...

Page 24: ...nutes passed Remote controller ON LEV positioning LEV is closed completely at once Power ON Breaker ON LEV is positioned However afterwards LEV is not positioned at the first remote controller ON Approximate for 2 minutes since compressor has started Opening is set by the initial opening Initial opening is set according to each operation modes and outer temperature conditions From approximate 2 mi...

Page 25: ...3 COOL RT is 3 or more NOTE Target discharge temperature Tb 80 70 65 Operation mode NOTE When the discharge temperature Ta is 50 or less on the cool operation LEV opening is set in 54 pulse When this state continues for 20 minutes the compressor is stopped and restarts in 3 minutes When the compressor is stopped the indoor unit indicates the abnormality of refrigerant system and stops OPERATION IN...

Page 26: ...K AM RESET CLOCK OPERATION SELECT button FAN SPEED CONTROL button OFF TIMER button HR button MIN button TIME SET button ON TIMER button RESET button ECONO COOL button VANE button Horizontal vane button CLOCK SET button LONG button WIDE VANE button Vertical vane button ON OFF TOO COOL PM AM TOO WARM Signal transmitting section Operation display section OPERATE STOP ON OFF button TEMPERATURE buttons...

Page 27: ...2 Initial room temperature minus 2 1 4 The initial set temperature is decided by the initial room temperature 1 When the system is restarted with the remote controller the system operates with the previous set temperature regard less of room temperature at restart The set temperature is calculated by the previous set temperature 5 TEMPERATURE buttons In I FEEL CONTROL mode set temperature is decid...

Page 28: ...en the indoor fan speed becomes High or the room temperature exceeds 26 C However when two of the above conditions b and c are satisfied again Time accumulation is resumed Compressor Outdoor fan OFF ON continuously at set speed Indoor fan ON ON OFF Operation chart Example 4 Discharge temperature protection MUH GA80VB The compressor is controlled by the temperature of discharge temperature thermist...

Page 29: ...When the thermostat is OFF the compressor repeats 4 minutes OFF and 1 minute ON When the room temperature is under 23 C When the thermostat is ON the compressor repeats 2 minutes ON and 3 minutes OFF When the thermostat is OFF the compressor repeats 4 minutes OFF and 1 minute ON 1 Indoor fan speed control Indoor fan operates at the set speed by FAN SPEED CONTROL button However in AUTO fan operatio...

Page 30: ...tor RT12 reads 22 C or more Time condition Indoor fan speed less than 2 minutes Low 2 minutes to 4 minutes Med 4 minutes or more High The upper limit of the fan speed is the set speed If the thermostat turns off this operation changes to flow soft control 2 Outdoor fan speed control MUH GA80VB Outdoor fan speed is controlled according to the temperature of ambient temperature thermistor RT63 Outdo...

Page 31: ... more MUH GA80VB 3 or more MUH GA50 GA60VB 3 or less Outdoor 52C contactor Compressor X62 R V coil SR61 Outdoor fan Defrost counter Indoor fan Indoor vane ON OFF ON OFF ON OFF ON OFF ON OFF Horizontal Set position Max 10 minutes 30 seconds 15 seconds 30 seconds 5 seconds NOTE 5 Defrosting Defrosting of outdoor heat exchanger is controlled by deicer P C board with detection by the defrost thermisto...

Page 32: ...RATE 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 Indoor fan continues to operate regardless of thermostat s OFF ON at set speed Coil frost prevention is as same as COOL mode of I FEEL CONT...

Page 33: ...de with VANE button the horizontal vane swings vertically The remote controller displays SWING mode is cancelled when VANE button is pressed once again 8 Cold air prevention in HEAT operation When any of the following conditions occurs in HEAT operation the vane angle changes to Angle 1 automatically to prevent cold air blowing on users Compressor is not operating Defrosting is performed Indoor co...

Page 34: ...once again or VANE button is pressed or LONG button is pressed or change to other operation mode NOTE ECONO COOL operation does not work in COOL mode of I FEEL CONTROL SWING operation w 1 Tp Value of RT12 MSH CA50 GA50 GA60VB Minimum value of indoor coil thermistor main RT12 and indoor coil thermistor sub RT13 MSH GA80VB In swing operation of ECONO COOL operation mode the initial air flow directio...

Page 35: ...on and HEAT operation W Indoor fan speed becomes faster than setting fan speed on the remote controller even when or is selected COOL and DRY HEAT About 100 About 150 Horizontal AIR FLOW blowing range 3 7 TIMER OPERATION 1 How to set the timer 1 Press OPERATE STOP ON OFF button to start the air conditioner 2 Check that the current time is set correctly NOTE Timer operation will not work without se...

Page 36: ...speed shifts to Med speed The coil frost prevention works even in emergency operation and defrosting too 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 pres...

Page 37: ...tes passed since compressor has started LEV opening is corrected to be once every 2 minutes so that discharge temperature becomes the target discharge temperature When the discharge temperature is lower than target one LEV is corrected in closed direction when the discharge temperature is higher than target one LEV is corrected in opening direction At thermostat OFF Opening in stop 150 pulse LEV i...

Page 38: ...r more NOTE Target discharge temperature Tb 85 80 70 65 Operation mode NOTE When the discharge temperature Ta is 50 or less on the cool operation or is 49 or less on heat operation LEV opening is set in 54 pulse When this state continues for 20 minutes the compressor is stopped and restarts in 3 minutes When the compressor is stopped the indoor unit indicates the abnormality of refrigerant system ...

Page 39: ...wing indication applies regardless of shape of the indicator Operation Indicator 4 1 I FEEL CONTROL OPERATION 1 Press OPERATE STOP ON OFF button on the remote controller OPERATION INDICATOR lamp of the indoor unit will turn on with a beep tone 2 Select I FEEL CONTROL mode with OPERATION SELECT button 3 The operation mode is determined by the room temper ature at start up of the operation Mode COOL...

Page 40: ...us 2 Initial room temperature minus 2 1 4 The initial set temperature is decided by the initial room temperature 1 When the system is restarted with the remote controller the system operates with the previous set temperature regard less of the room temperature at restart The set temperature is calculated by the previous set temperature 5 TEMPERATURE buttons In I FEEL CONTROL mode set temperature i...

Page 41: ...sn t operates continuously to maintain sufficient cooling capacity 1 Outdoor fan control Outdoor unit compressor operates with outdoor fan OFF basically But any of following conditions is satisfied the outdoor fan turns ON for about 5 seconds a the defrost thermistor RT61 reads 50 or more b the fin temperature thermistor RT64 reads 60 or more 2 LEV expansion valve control In normal cool operation ...

Page 42: ...ture Initial temperature difference Thermostat Room temperature minus set temperature less than 0 3 ON Room temperature minus set temperature 0 3 or more OFF 2 Indoor fan speed control Indoor fan operates at the set speed by FAN SPEED CONTROL button When thermostat OFF compressor OFF fan speed becomes Very Low 3 The operation of the compressor and indoor fan outdoor fan Compressor operates by temp...

Page 43: ...quent intervals are set to be longer and less frequent depending on defrosting time The third and subsequent defrost intervals follow any of the three patterns 5 or 10 to 20 minutes longer the same or 5 or 10 to 20 minutes shorter compared with the previous defrost interval with the longest 125 minutes and the shortest 40 minutes 2 Releasing conditions of defrosting Defrosting is released when any...

Page 44: ...the room temperature thermistor RT11 reads set temperature or less HEAT mode is selected 2 Mode change In case of the following conditions the operation mode is changed 1 COOL mode changes to HEAT mode when 15 minutes have passed with the room temperature 2 degrees below the set temperature 2 HEAT mode changes to COOL mode when 15 minutes have passed with the room temperature 2 degrees above the s...

Page 45: ...the indoor unit turns on with a beep tone 2 Select HEAT 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 Thermostat control Thermostat control is as same as HEAT mode of I FEEL CONTROL 4 1 3 1 2 Indoor fan speed control Indoor fan speed control is as same as HEAT mode of I FEEL CONTROL 4 1 3 2...

Page 46: ... angle and mode change as follows by pressing the VANE CONTROL button High Med Low High Rotational frequency time 4 6 INDOOR FAN MOTOR CONTROL 1 Rotational frequency feedback control The indoor fan motor is equipped with a rotational frequency sensor and outputs signal to the microprocessor to feed back the rotational frequency Comparing the current rotational frequency with the target rotational ...

Page 47: ...flashing These marks disappear in 1 minute After setting the ON timer check that OPERATION INDICATOR lamp of the indoor unit lights Indoor coil thermistor RT12 temperature NOTE1 If the temperature of RT12 reads from 18 to 38 at the air conditioner starting this control works NOTE2 When 2 or more indoor units are operated with multi outdoor unit even if any indoor unit turns thermostat off this con...

Page 48: ... will start NOTE Do not press EMERGENCY OPERATION switch during normal operation EMERGENCY OPERATION switch Press once Cool Press again Heat Press once again Stop OPERATION INDICATOR lamp The following indication applies regardless of the shape of lamp Lighted Not Lighted PROGRAM TIMER Example 1 The current time is 8 00 PM The unit turns off at 11 00 PM and on at 6 00 AM OFF timer and ON timer can...

Page 49: ...ooster chopper circuit Function of main parts It improves power factor It rectifies AC and controls its voltage 4 10 2 Outline of main power supply circuit 1 At the start of operation Main power supply circuit is formed when X64 Relay is turned ON at compressor startup To prevent rush current from running into the circuit when power supply is turned ON R64A and R64B Current limitting resistor are ...

Page 50: ...ared to active filter method In addition output and efficiency is enhanced by combining with vector controlled inverter in order to boost the voltage of power supplied to IPM Input current waveform without PAM Input current waveform with PAM Due to the time of no electricity Power factor gets worse Harmonic gets increased Input voltage Release of energy stored in L Energized time is extended by op...

Page 51: ...responding to the rotation times of compressor motor The rotation can be set to higher compared to the conventional motor drive system So the time in which air conditioner can be operated with energy saved is longer than conventional models This can save annual electric consumption Compared to square wave control the torque pulsation is reduced at rotation so that the motor operates more quietly S...

Page 52: ...t maximum opening degree reaches maxi mum opening degree approximate in 15 minutes after com pressor stops Remote controller ON LEV is positioned first full closed at zero pulse and then positioned During 2 to 13 minutes after compressor starts LEV is fixed to standard opening degree according to opera tional frequency of compressor More than 13 minutes have passed since compressor start up LEV op...

Page 53: ...orrected according to discharge temperature Positioning Air conditioner ON Air conditioner OFF thermostat off LEV opening degree about 15 minutes 3 Control data 06 05 04 03 02 01 LEV opening degree A target discharge temperature B C D E F 30 50 70 Operational frequency of the compressor 90 110 130 Hz A 50 46 B 54 53 C 60 58 D 64 63 E 67 68 F 67 72 a Reference value of target discharge temperature ...

Page 54: ...TIMER button CLOCK SET button TIME SET buttons FORWARD button BACKWARD button VANE CONTROL button Horizontal vane button OFF TIMER button i see button This diagram shows an overall view PLASMA button AREA button RESET button WIDE VANE button Vertical vane button Signal transmitting section Operation display section Temperature buttons OPERATE STOP ON OFF button FAN SPEED CONTROL button OPERATION S...

Page 55: ...erature minus set temperature less than 1 0 OFF Set temperature Difference between room temperature and set temper ature during operation 4 Low outside temperature operation If the outside temperature falls to 18 C or less during operation in COOL mode the unit enters the low outside temperature operation mode Operation 1 If the unit enters the low outside temperature operation mode the outside fa...

Page 56: ...AN SPEED CONTROL button When thermostat OFF compressor OFF fan speed becomes Very Low 3 Coil frost prevention Coil frost prevention is as same as COOL mode 5 1 3 The indoor fan maintains the actual speed of the moment 4 Low outside temperature operation Low outside temperature operation is as same as COOL mode 5 1 4 1 0 0 7 1 Thermostat control Thermostat is ON or OFF by difference between room te...

Page 57: ...patterns 5 or 10 to 20 minutes longer the same or 5 or 10 to 20 minutes shorter compared with the previous defrost interval with the longest 150 minutes and the shortest 30 minutes 2 Releasing conditions of defrosting Defrosting is released when any of the following conditions is satisfied a The defrost thermistor continues to read 5 C or more MUZ FA25VA 8 C or more MUZ FA25VAH 10 C or more MUZ FA...

Page 58: ...2 If the room temperature thermistor RT11 reads set temperature or less HEAT mode is selected 2 Mode change In case of the following conditions the operation mode is changed 1 COOL mode changes to HEAT mode when 15 minutes have passed with the room temperature 2 degrees below the set temperature 2 HEAT mode changes to COOL mode when 15 minutes have passed with the room temperature 2 degrees above ...

Page 59: ... the signal the fan motor is regarded locked up When the fan motor lock up POWER lamp flashes on and off to show the fan motor abnormality Fan speed is switched according to the compressor frequency 5 6 OUTDOOR FAN MOTOR CONTROL COOL Fan speed Up Down Up Down Mode HEAT Compressor frequency MUZ FA25 MUZ FA35 Relation between compressor frequency and fan speed 43Hz 33Hz 43Hz 33Hz 54Hz 41Hz 54Hz 41Hz...

Page 60: ... The remote controller displays SWING mode is cancelled when VANE CONTROL button is pressed once again The air conditioner starts heat ing operation approx 3 minutes after the vane has moved to the horizontal position Sometimes the area around your feet may not warm To warn the area around the feet set the horizontal vane to AUTO or the downward blowing position When VANE CONTROL button is pressed...

Page 61: ...h a stepping motor for the vertical vane The rotating direction speed and angle of the motor are controlled by pulse signals approximate 12V transmitted from microprocessor 2 The vertical vane angle and mode change as follows by pressing WIDE VANE button 3 Positioning The vane presses the vane stopper once to confirm the standard position and then set to the desired angle Confirming of standard po...

Page 62: ...1 AREA setting is only available during i see control operation NOTE2 If AREA setting is canceled the vertical vane returns to the previously set position before AREA setting NOTE3 The horizontal air flow direction WIDE VANE button including horizontal SWING cannot be set during AREA setting AUTO LEFT RIGHT Cancel The indoor unit delivers warm air detecting the cold area in the room If AREA settin...

Page 63: ...ed at center Installed at left Installed at right Indoor unit display AREA Remote controller display or or NOTE If the AREA setting is activated AUTO i see Sensor moves in a range of 150 degrees detecting floor wall temperature of 3 area left right center Therefore the detected temperatures may be different from the temperatures measured on commercial thermometers depending on the condition or tem...

Page 64: ...rge high voltage electricity PLASMA WASH lamp Not lighted Lighted Description of PLASMA DUO operation function Both PLASMA DEODORIZING and PLASMA AIR PURIFYING operation work function PLASMA DEODORIZING operation cleans the air inside the room by adsorbing and decomposing the particles of odor releasing substances and gases such as formaldehyde function PLASMA AIR PURIFYING operation cleans the ai...

Page 65: ...er Each time the button is pressed OFF timer mode alternates between ON and OFF 2 Set the time of the timer using TIME SET buttons and Each time FORWARD button is pressed the set time increases by 10 minutes each time BACKWARD button is pressed the set time decreases by 10 minutes 2 Cancel TIMER setting can be cancelled with ON OFF TIMER buttons To cancel ON timer press ON TIMER button To cancel O...

Page 66: ...EMERGENCY COOL HEAT MODE with a set temperature of 24 C The fan speed shifts to Med The coil frost prevention works even in emergency operation and defrosting too 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 c...

Page 67: ...ooster chopper circuit Function of main parts It improves power factor It rectifies AC and controls its voltage 5 14 2 Outline of main power supply circuit 1 At the start of operation Main power supply circuit is formed when X64 Relay is turned ON at compressor startup To prevent rush current from running into the circuit when power supply is turned ON R64A and R64B Current limitting resistor are ...

Page 68: ...compared to active filter method In addition output and efficiency is enhanced by combining with vector controlled inverter in order to boost the voltage of power supplied to IPM Input current waveform without PAM Input current waveform with PAM Due to the time of no electricity Power factor gets worse Harmonic gets increased Input voltage Release of energy stored in L Energized time is extended b...

Page 69: ...ng to the rotation times of compressor motor The rotation can be set to higher compared to the conventional motor drive system So the time in which air conditioner can be operated with energy saved is longer than conventional models This can save annual electric consumption Compared to square wave control the torque pulsation is reduced at rotation so that the motor operates more quietly Since res...

Page 70: ...pening degree approximate in 15 minutes after com pressor stops Remote controller ON LEV is positioned first full closed at zero pulse and then positioned COOL DRY MODE During 1 to 5 minutes after compressor starts HEAT MODE During 1 to 15 minutes after compressor starts LEV is fixed to standard opening degree according to opera tional frequency of compressor More than COOL DRY 5 HEAT 15 minutes h...

Page 71: ...harge temperature Positioning Air conditioner ON Air conditioner OFF thermostat off LEV opening degree about 5 minutes COOL DRY about 15 minutes HEAT 3 Control data 06 05 04 03 02 01 LEV opening degree A target discharge temperature B C D E F 30 50 70 Operational frequency of the compressor 90 110 130 Hz A 47 41 B 53 48 C 58 55 D 63 60 E 67 65 F 67 65 a Reference value of target discharge temperat...

Page 72: ...P ON OFF button FAN SPEED CONTROL button OPERATION SELECT button ECONO COOL button Indication of remote controller model is on back MSZ GA22VA MSZ CB22VA MSZ GA25VA MSZ CB25VA MUZ GA25VA MUZ GA25VAH MSZ GA35VA MSZ CB35VA MUZ GA35VA MUZ GA35VAH Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state Approx 2 or more Difference between targ...

Page 73: ...es once 1 hour if the outside temperature rises over 18 C the unit goes back to the normal COOL mode and if the outside temperature is still 18 C or less the unit stays in the low outside temperature operation mode 4 Dew drop prevention When the ambient temperature thermistor RT65 reads 12 or less as coil frost or dew drop from indoor unit may occur the compressor turns OFF with the outdoor fan ON...

Page 74: ...OL button When thermostat OFF compressor OFF fan speed becomes Very Low 3 Coil frost prevention Coil frost prevention is as same as COOL mode 6 1 3 The indoor fan maintains the actual speed of the moment 4 Low outside temperature operation Low outside temperature operation is as same as COOL mode 6 1 4 1 0 0 7 1 Thermostat control Thermostat is ON or OFF by difference between room temperature and ...

Page 75: ... follow any of the three patterns 5 or 10 to 20 minutes longer the same or 5 or 10 to 20 minutes shorter compared with the previous defrost interval with the longest 125 minutes and the shortest 40 minutes 2 Releasing conditions of defrosting Defrosting is released when any of the following conditions is satisfied a The defrost thermistor continues to read 5 C or more MUZ GA25 35VA 8 C or more MUZ...

Page 76: ...2 If the room temperature thermistor RT11 reads set temperature or less HEAT mode is selected 2 Mode change In case of the following conditions the operation mode is changed 1 COOL mode changes to HEAT mode when 15 minutes have passed with the room temperature 2 degrees below the set temperature 2 HEAT mode changes to COOL mode when 15 minutes have passed with the room temperature 2 degrees above ...

Page 77: ... cannot detect the signal the fan motor is regarded locked up When the fan motor lock up POWER lamp flashes on and off to show the fan motor abnormality 6 6 OUTDOOR FAN MOTOR CONTROL MUZ GA35 Fan speed is switched according to the compressor frequency COOL Fan speed Up Down Up Down Mode HEAT Compressor frequency MUZ GA35 Relation between compressor frequency and fan speed 54Hz 41Hz 54Hz 41Hz Up Do...

Page 78: ... The remote controller displays SWING mode is cancelled when VANE CONTROL button is pressed once again The air conditioner starts heat ing operation approx 3 minutes after the vane has moved to the horizontal position Sometimes the area around your feet may not warm To warn the area around the feet set the horizontal vane to AUTO or the downward blowing position When VANE CONTROL button is pressed...

Page 79: ...er 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 6 8 TIMER OPERATION 1 How to set the timer 1 Press OPERATE STOP ON OFF button to start the air conditioner 2 Check that the current time is set correctly NOTE Timer operation will n...

Page 80: ...ODE with a set temperature of 24 C The fan speed shifts to Med The coil frost prevention works even in emergency operation and defrosting too 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 ...

Page 81: ...ooster chopper circuit Function of main parts It improves power factor It rectifies AC and controls its voltage 6 10 2 Outline of main power supply circuit 1 At the start of operation Main power supply circuit is formed when X64 Relay is turned ON at compressor startup To prevent rush current from running into the circuit when power supply is turned ON R64A and R64B Current limitting resistor are ...

Page 82: ...compared to active filter method In addition output and efficiency is enhanced by combining with vector controlled inverter in order to boost the voltage of power supplied to IPM Input current waveform without PAM Input current waveform with PAM Due to the time of no electricity Power factor gets worse Harmonic gets increased Input voltage Release of energy stored in L Energized time is extended b...

Page 83: ...ng to the rotation times of compressor motor The rotation can be set to higher compared to the conventional motor drive system So the time in which air conditioner can be operated with energy saved is longer than conventional models This can save annual electric consumption Compared to square wave control the torque pulsation is reduced at rotation so that the motor operates more quietly Since res...

Page 84: ...mum opening degree approximate in 15 minutes after com pressor stops Remote controller ON LEV is positioned first full closed at zero pulse and then positioned COOL DRY MODE During 1 to 5 minutes after compressor starts HEAT MODE During 1 to 15 minutes after compressor starts LEV is fixed to standard opening degree according to opera tional frequency of compressor More than COOL DRY 5 HEAT 15 minu...

Page 85: ...egree Opening degree is corrected according to discharge temperature Positioning Air conditioner ON Air conditioner OFF thermostat off LEV opening degree about 5 minutes COOL DRY about 15 minutes HEAT 3 Control data 06 05 04 03 02 01 LEV opening degree A target discharge temperature B C D E F 30 50 70 Operational frequency of the compressor 90 110 130 Hz A B C D E F a Reference value of target dis...

Page 86: ... 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 1 0 0 7 1 Thermostat control Thermostat is ON or OFF by difference between room temperature and set temperature Initial temperature difference Thermostat Room temperature minus set temperature 1 0...

Page 87: ...iable 8 C to 10 C Raise 6Hz Fixed Lower 3Hz Lower 6Hz Compressor is turned OFF for 5 minutes when temperature of indoor coil thermistor continues 3 C or less for 5 minutes or more The indoor fan maintains the actual speed of the moment 3 Coil frost prevention Temperature control When indoor coil thermistor detects following temperature for 90 seconds operational frequency of compressor is controll...

Page 88: ...erence between room temperature and set temperature Initial temperature difference Thermostat Room temperature minus set temperature less than 2 0 ON Room temperature minus set temperature 2 0 or more OFF 2 Indoor fan speed control Indoor fan operates at the set speed by FAN SPEED CONTROL button When thermostat OFF compressor OFF fan speed becomes Very Low 1 0 0 7 1 Thermostat control Thermostat i...

Page 89: ...tor reads 3 C or less b The cumulative operation time of the compressor has reached any of the set valuesw 31 35 45 55 65 75 85 95 105 115 150 minutes c More than 5 minutes have passed since the start up of the compressor w Set value of compressor operation time hereinafter referred to as defrost interval This is decided by the temperature of defrost thermistor and ambient temperature thermistor t...

Page 90: ...hat the indoor unit which is operating in AUTO cannot change over the other operating mode COOL HEAT and becomes a state of standby 3 Indoor fan control Vane control As the indoor fan speed and the horizontal vane position depend on the selected operation mode when the operation mode changes over they change to the exclusive ones High Med Low High Rotational frequency time 6 17 INDOOR FAN MOTOR CO...

Page 91: ...make the optimum room tem perature distribution COOL and DRY operation Vane angle is fixed to Angle 1 HEAT operation Vane angle is fixed to Angle 4 5 STOP operation OFF and ON TIMER standby When the following cases occur 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 TIME...

Page 92: ...ven if any indoor unit turns thermostat off this control doesn t work in the indoor unit Horizontal vane Set position Horizontal Position 22 18 Released Cold Air Prevention 9 ECONO COOL 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 according to the temperature of indoor ...

Page 93: ...nge as follows by pressing WIDE VANE button 3 Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle Confirming of standard position is performed in case of follows a When OPERATE STOP ON OFF button is pressed POWER ON OFF b When SWING is started or finished c When the power supply turns ON 4 SWING MODE By selecting SWING mode wi...

Page 94: ...ach time FORWARD button is pressed the set time increases by 10 minutes each time BACKWARD button is pressed the set time decreases by 10 minutes 2 Cancel TIMER setting can be cancelled with ON OFF TIMER buttons To cancel ON timer press ON TIMER button To cancel OFF timer press OFF TIMER button TIMER is cancelled and the display of set time disappears START STOP START STOP PROGRAM TIMER Example 1 ...

Page 95: ...signal from the remote controller In case of latter normal operation will start NOTE Do not press EMERGENCY OPERATION switch during normal operation EMERGENCY OPERATION switch Lighted Not lighted Press once Cool Press again Heat Press once again Stop OPERATION INDICATOR lamp The following indication applies regardless of the shape of lamp 6 22 INVERTER SYSTEM CONTROL 6 22 1 Inverter main power sup...

Page 96: ...lize the voltage of DC supplied to inverter circuit and make its waveform smooth 6 22 3 Sine wave control In these air conditioners compressor equips brushless DC motor which doesn t have Hall element In short the motor is sensorless However it s necessary to locate the polar direction of rotor in order to drive brushless DC motor efficiently The general detection method of the polar direction for...

Page 97: ...e operated with energy saved is longer than conventional models This can save annual electric consumption Compared to square wave control the torque pulsation is reduced at rotation so that the motor operates more quietly Since response and efficiency are enhanced in sine wave control finer adjustment can be provided w In brushless DC motor permanent magnet is embedded in the rotor Therefore it do...

Page 98: ...pening degree approximate in 15 minutes after com pressor stops Remote controller ON LEV is positioned first full closed at zero pulse and then positioned COOL DRY MODE During 1 to 5 minutes after compressor starts HEAT MODE During 1 to 15 minutes after compressor starts LEV is fixed to standard opening degree according to opera tional frequency of compressor More than COOL DRY 5 HEAT 15 minutes h...

Page 99: ...oner ON Air conditioner OFF thermostat off LEV opening degree about 5 minutes COOL DRY about 15 minutes HEAT 3 Control data 06 05 04 03 02 01 LEV opening degree A target discharge temperature B C D E F 30 50 70 Operational frequency of the compressor 90 110 Hz A 60 60 B 60 63 C 60 65 D 63 67 E 66 70 F 67 70 a Reference value of target discharge temperature COOL HEAT 01 150 130 02 166 150 03 186 17...

Page 100: ...re afterwards Under the ON TIMER timer operation the mode is determined as follows When the system is stopped with OPERATE STOP ON OFF button on the remote controller and restarted within 2 hours in I FEEL CONTROL mode the system operates in previous mode automatically regard less of the room temperature Example Previous operation COOL mode of I FEEL CONTROL or COOL mode When the system is restart...

Page 101: ...ontrol When the indoor coil thermistor RT12 reads 1 MCF GA35VB 1 MCF GA50 GA60VB or below the coil frost prevention mode starts immediately However the coil frost prevention doesn t work for 5 minutes since the compressor has started The indoor fan operates at the set speed the compressor stops for 5 minutes After that if RT12 still reads below 1 MCF GA35VB 1 MCF GA50 GA60VB this mode is prolonged...

Page 102: ...ion is as same as coil frost prevention during COOL mode of I FEEL CONTROL Indoor fan operates at the set speed and the compressor stops for 5 minutes because protection Coil frost prevention has the priority However when coil frost prevention works while the compressor is not operating it s speed becomes Low 0 3 0 3 1 Thermostat control Thermostat is ON or OFF by difference between room temperatu...

Page 103: ...set temperature Set temper ature is as shown in the right chart Thermostat SET TEMP does not work The other operations are same as DRY mode of I FEEL CONTROL 4 DRY operation will not work when the room tem perature is 13 C or below 3 Positioning The vane presses the vane stopper once to confirm the standard position and then moves to the set angle Confirming of standard position is performed in ca...

Page 104: ...ture is more than 2 C the swing opera tion is performed in table D H for more cooling The air conditioner repeats the swing operation in various cycle as follows Temperature of indoor coil thermistor RT12 more than 24 C 5 2 Downward blow time second 22 C to 24 C 21 C to 22 C 20 C to 21 C 18 C to 20 C 17 C to 18 C 15 C to 17 C 15 C or less 5 8 11 14 17 20 23 Horizontal blow time second 20 17 14 11 ...

Page 105: ...n and display show the order of OFF timer and ON timer operation PM AM PM PM Example 1 The current timer is 8 00 PM The unit turns off at 11 00 PM and on at 6 00 AM Example 2 The current time is 11 00 AM The unit turns on at 5 00 PM and off at 9 00 PM NOTE TIMER setting will be cancelled by power failure or breaker functioning EMERGENCY OPERATION switch 7 7 EMERGENCY TEST OPERATION In case of test...

Page 106: ... room temperature afterwards Under ON TIMER operation mode is deter mined as follows When the system is stopped with OPERATE STOP ON OFF button on the remote controller and restarted within 2 hours in I FEEL CONTROL mode the system operates in previous mode automat ically regardless of the room temperature Operation time chart Example Previous operation COOL mode of I FEEL CONTROL or COOL mode Whe...

Page 107: ...re 25 to 26 less than 23 23 to 25 24 Initial room temperature minus 2 Initial room temperature minus 2 1 3 Coil frost prevention Temperature control When the indoor coil thermistor RT12 reads 3 C MCFH GA35VB 1 C MCFH GA50 GA60VB or below the coil frost prevention mode starts immediately However the coil frost prevention doesn t work for 5 minutes since the compressor has started The indoor fan ope...

Page 108: ...temperature and set temperature Initial temperature difference Thermostat Room temperature minus set temperature 0 3 or more ON Room temperature minus set temperature less than 0 3 OFF Set temperature Difference between room temperature and set tem perature during operation Operation time chart Example Thermostat Indoor fan Outdoor fan Compressor ON ON OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON ON O...

Page 109: ...ature minus room temperature less than 1 C Low Initial temperature difference Fan speed Difference between room temperature and set temperature during operation 1 1 7 2 4 2 Cold air prevention control The fan runs at set speed when the indoor coil thermistor RT12 temperature exceeds 22 C The fan operates at Very Low when the temperature of indoor coil thermistor RT12 is below 18 C But the fan stop...

Page 110: ...hart NOTE When the indoor coil thermistor reads above 18 C indoor fan operates at Very Low for 30 seconds When the indoor coil thermistor reads 18 C or less the indoor fan stops 3 1 or more 3 or less Compressor contactor Outdoor 52C X62 R V coil SR61 Outdoor fan Defrost counter Indoor fan Indoor vane ON OFF ON OFF ON OFF ON OFF ON OFF Position 1 Set Position Max 10 minutes 30 seconds 30 seconds 5 ...

Page 111: ...e and initial room temperature in DRY mode 8 5 AUTO VANE OPERATION 1 Vane motor drive This series is equipped with a stepping motor for the vane The rotating direction speed and angle of the motor are controlled by pulse signals approx 12V transmitted from indoor microprocessor 2 Each time the VANE CONTROL button is pressed angle of horizontal vane is changed in sequence from 1 2 3 4 5 SWING to AU...

Page 112: ...n is pressed in COOL mode set temperature is automatically set 2 C higher Also the horizontal vane swings in various cycle according to the temperature of indoor heat exchanger RT12 SWING operation makes you feel cooler than set temperature So even though the set temperature is higher the air conditioner can keep comfort As a result energy can be saved ECONO COOL operation is cancelled when ECONO ...

Page 113: ...nctions 2 Cancel TIMER setting can be cancelled with ON OFF TIMER buttons or To cancel ON timer press ON TIMER button To cancel OFF timer press OFF TIMER button TIMER is cancelled and the display of set time disappears PROGRAM TIMER OFF timer and ON timer can be used in combination and display show the order of OFF timer and ON timer operation PM AM PM PM Example 1 The current timer is 8 00 PM The...

Page 114: ... test run operation the system shifts to EMERGENCY COOL HEAT MODE with a set temperature of 24 C The fan speed shifts to Med speed The coil frost prevention works even in emergency operation and defrosting too 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 rece...

Page 115: ...ot restart for 3 minutes WIRELESS REMOTE CONTROLLER This diagram shows an overall view ra verall view Open the front lid ON TIMER button CLOCK SET button TIME SET buttons FORWARD button BACKWARD button OFF TIMER button i save button RESET button VANE CONTROL button Signal transmitting section Operation display section Temperature buttons OPERATE STOP ON OFF button FAN SPEED CONTROL button OPERATIO...

Page 116: ...eration If the outside temperature falls to 18 C or less during operation in COOL mode the unit enters the low outside temperature operation mode Operation 1 If the unit enters the low outside temperature operation mode the outside fan rotation speed gets slow down 2 Even when the unit is in the thermostat off status under the low outside temperature operation mode the outside fan rotation does no...

Page 117: ...ow outside temperature operation is as same as COOL mode 9 1 4 1 0 0 7 1 Thermostat control Thermostat is ON or OFF by difference between room temperature and set temperature Initial temperature difference Thermostat Room temperature minus set temperature 1 0 or more ON Room temperature minus set temperature less than 1 0 OFF Set temperature Difference between room temperature and set tem perature...

Page 118: ...conds b Defrosting time has exceeded 10 minutes c Any other mode than HEAT mode is set during defrosting 6 Defrost heater SUZ KA25 KA35VAH 1 Starting conditions When all of the following conditions a d are satisfied defrost heater turns ON to prevent ice from foaming on the base of outdoor unit a HEAT mode is selected b The ambient temperature thermistor RT65 reads 5 or less for 5 minutes continuo...

Page 119: ...ion mode is selected 1 If the room temperature thermistor RT11 reads more than set temperature COOL mode is selected 2 If the room temperature thermistor RT11 reads set temperature or less HEAT mode is selected 2 Mode change In case of the following conditions the operation mode is changed 1 COOL mode changes to HEAT mode when 15 minutes have passed with the room temperature 2 degrees below the se...

Page 120: ... up When the fan motor lock up POWER lamp flashes on and off to show the fan motor abnormality Fan speed is switched according to the compressor frequency 9 6 OUTDOOR FAN MOTOR CONTROL COOL Fan speed Up Down Up Down Mode HEAT Compressor frequency SUZ KA25 SUZ KA35 SUZ KA50 Relation between compressor frequency and fan speed 43Hz 33Hz 43Hz 33Hz 54Hz 41Hz 54Hz 41Hz Up Down Fan speed High Low Compres...

Page 121: ... prevention in HEAT operation When any of the following conditions occurs in HEAT operation the vane angle changes to Horizontal position automati cally to prevent cold air blowing on users Compressor is not operating Defrosting is performed Indoor coil thermistor RT12 reads 24 or below Indoor coil thermistor RT12 temperature is raising from 24 C or below but it does not exceed 39 7 SWING MODE By ...

Page 122: ...k With this function air comes out simultaneously from the upper and lower air outlets so that the room can be cooled or heated effectively This function is set using the switch behind the front grille of the indoor unit This function is available in cooling and heating operation 1 How to set to blow out air from the upper and lower air outlets 2 How to set to blow out air from the upper air outle...

Page 123: ...ed the air conditioner will not be able to cool or warm the room well Do not block the receiver with the grating Otherwise the grating will interfere with the remote controller signal and significantly reduce the distance and area angle from which the signals can be received Use a grating with vertical bars etc that has at least 75 open area If the grating has horizontal bars or if the open area i...

Page 124: ...ave OPERATION 1 How to set i save operation To start i save operation 1 Press OPERATE STOP ON OFF button to start the air conditioner 2 Press OPERATION SELECT button to select COOL or HEAT mode i save operation can only be set during cooling or heating operation Not available in dry operation or auto mode operation 3 Press i save button The operation indicator lamp on the right side of the indoor ...

Page 125: ...ing TIME SET buttons and Each time FORWARD button is pressed the set time increases by 10 minutes each time BACKWARD button is pressed the set time decreases by 10 minutes 2 Cancel TIMER setting can be cancelled with ON OFF TIMER buttons To cancel ON timer press ON TIMER button To cancel OFF timer press OFF TIMER button TIMER is cancelled and the display of set time disappears START STOP START STO...

Page 126: ...OPERATION INDICATOR lamp will light The first 30 minutes of operation is the test run operation This operation is for servicing The Indoor fan speed runs at High speed and the system is in continuous operation The thermostat in ON 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 The coil frost prevention...

Page 127: ...uttons Fan speed control button Operation select button Timer mode select button ECONO COOL button MSZ HA25VA MUZ HA25VA MSZ HA35VA MUZ HA35VA Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state Approx 2 or more Difference between target temperature and room temperature Approx 2 or less This shows that the air conditioner is operating...

Page 128: ...ons TOO WARM or TOO COOL button to select the desired temperature The setting range is 16 31 C 2 Indoor fan speed control Indoor fan operates at the set speed by FAN SPEED CONTROL button When thermostat OFF compressor OFF fan speed becomes Very Low 3 Coil frost prevention Coil frost prevention is as same as COOL mode 10 1 3 The indoor fan maintains the actual speed of the moment 1 0 0 7 1 Thermost...

Page 129: ...ates at the set speed by FAN SPEED CONTROL button In Auto the fan speed is as follows Set temperature minus room temperature 2 or more High Set temperature minus room temperature Between 0 2 and 2 Med Set temperature minus room temperature less than 0 2 Low 0 2 1 7 2 4 Initial temperature difference Fan speed Difference between room temperature and set tem perature during operation 2 Cold air prev...

Page 130: ...essor to feedback the rotational frequency Comparing the current rotational frequency with the target rotational frequency Super High High Med Low the microprocessor adjusts fan motor electric current to make the current rotational frequency close to the target rotational frequency With this control when the fan speed is switched the rotational frequency changes smoothly 2 Fan motor lock up protec...

Page 131: ...ally to prevent cold air blowing on users Compressor is not operating Defrosting is performed Indoor coil thermistor RT12 reads 24 or below Indoor coil thermistor RT12 temperature is raising from 24 C or below but it does not exceed 39 For about 3 minutes after compressor starts 7 SWING MODE By selecting SWING mode with VANE CONTROL button the horizontal vane swings vertically The remote controlle...

Page 132: ...again the vane returns to the previously set position and the air conditioner starts the cooling or drying operation in approx 3minutes SWING operation In swing operation of ECONO COOL operation mode the initial air flow direction is adjusted to Horizontal According to the temperature of indoor coil thermistor RT12 at starting of this operation next downward blow time is decided Then when the down...

Page 133: ...n the front of the indoor unit Emergency operation is available when the remote controller is missing has failed or the batteries 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 speed runs at High speed and the system is in continuous operation Th...

Page 134: ...ster chopper circuit Function of main parts It improves power factor It rectifies AC and controls its voltage 10 8 2 Outline of main power supply circuit 1 At the start of operation Main power supply circuit is formed when X64 Relay is turned ON at compressor startup To prevent rush current from running into the circuit when power supply is turned ON R64A and R64B Current limitting resistor are pl...

Page 135: ...mpared to active filter method In addition output and efficiency is enhanced by combining with vector controlled inverter in order to boost the voltage of power supplied to IPM Input current waveform without PAM Input current waveform with PAM Due to the time of no electricity Power factor gets worse Harmonic gets increased Input voltage Release of energy stored in L Energized time is extended by ...

Page 136: ...otor The rotation can be set to higher compared to the conventional motor drive system So the time in which air conditioner can be operated with energy saved is longer than conventional models This can save annual electric consumption Compared to square wave control the torque pulsation is reduced at rotation so that the motor operates more quietly Since response and efficiency of motor are enhanc...

Page 137: ...lay section Temperature buttons OPERATE STOP ON OFF button FAN SPEED CONTROL button OPERATION SELECT button ECONO COOL button Indication of remote controller model is on back MSZ GB50VA MUZ GB50VA Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state Approx 2 or more Difference between target temperature and room temperature Approx 2 or...

Page 138: ...ure less than 1 0 OFF Set temperature Difference between room temperature and set temper ature during operation 11 1 COOL 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 3...

Page 139: ...L button When thermostat OFF compressor OFF fan speed becomes Very Low 3 Coil frost prevention Coil frost prevention is as same as COOL mode 11 1 3 The indoor fan maintains the actual speed of the moment 4 Low outside temperature operation Low outside temperature operation is as same as COOL mode 11 1 4 1 0 0 7 1 Thermostat control Thermostat is ON or OFF by difference between room temperature and...

Page 140: ...stor reads 3 C or less b The cumulative operation time of the compressor has reached any of the set valuesw 31 35 45 55 65 75 85 95 105 115 150 minutes c More than 5 minutes have passed since the start up of the compressor w Set value of compressor operation time hereinafter referred to as defrost interval This is decided by the temperature of defrost thermistor and ambient temperature thermistor ...

Page 141: ... unit which is operating in AUTO cannot change over the other operating mode COOL HEAT and becomes a state of standby 3 Indoor fan control Vane control As the indoor fan speed and the horizontal vane position depend on the selected operation mode when the operation mode changes over they change to the exclusive ones High Med Low Super High Super High time Rotational frequency 11 5 INDOOR FAN MOTOR...

Page 142: ...ly The remote controller displays SWING mode is cancelled when VANE CONTROL button is pressed once again 11 6 OUTDOOR FAN MOTOR CONTROL Fan speed is switched according to the compressor frequency COOL Fan speed Up Down Up Down Mode HEAT Compressor frequency Hz Relation between compressor frequency and fan speed 44 33 44 33 Up Down Fan speed High Low Compressor frequency Min Max 3 Positioning The v...

Page 143: ...he compressor stops for 3 minutes even during the operation of the air conditioner The air conditioner operates with decreased air flow until the compressor turns on again 9 To change the air flow direction not to blow directly onto your body Horizontal position When VANE CONTROL button is pressed again the vane returns to the previously set position and the air conditioner starts the cooling or d...

Page 144: ...ing 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 ON timer setting 1 Press ON TIMER button to set ON timer Each time the button is pressed ON timer mode alternates between ON and OFF 2 Set the time of the timer using TIME SET buttons and Each time FORWARD button is pressed the set time increases by 10 mi...

Page 145: ...rks even in emergency operation and defrosting too 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 1...

Page 146: ...lize the voltage of DC supplied to inverter circuit and make its waveform smooth 11 10 3 Sine wave control In these air conditioners compressor equips brushless DC motor which doesn t have Hall element In short the motor is sensorless However it s necessary to locate the polar direction of rotor in order to drive brushless DC motor efficiently The general detection method of the polar direction fo...

Page 147: ...e time in which air conditioner can be operated with energy saved is longer than conventional models This can save annual electric consumption Compared to square wave control the torque pulsation is reduced at rotation so that the motor operates more quietly Since response and efficiency are enhanced in sine wave control finer adjustment can be provided w In brushless DC motor permanent magnet is ...

Page 148: ...opening degree approximate in 15 minutes after com pressor stops Remote controller ON LEV is positioned first full closed at zero pulse and then positioned COOL DRY MODE During 1 to 5 minutes after compressor starts HEAT MODE During 1 to 15 minutes after compressor starts LEV is fixed to standard opening degree according to opera tional frequency of compressor More than COOL DRY 5 HEAT 15 minutes ...

Page 149: ...ndard opening degree Opening degree is corrected according to discharge temperature Positioning Air conditioner ON Air conditioner OFF thermostat off LEV opening degree about 5 minutes COOL DRY about 15 minutes HEAT 3 Control data 06 05 04 03 02 01 LEV opening degree A target discharge temperature B C D E F 30 50 70 Operational frequency of the compressor 90 110 Hz A 60 60 B 60 65 C 60 70 D 63 75 ...

Page 150: ... turns ON It short circuits the resistance which restricts rush current during the normal operation after the compressor startup Booster chopper circuit Function of main parts It improves power factor It rectifies AC and controls its voltage MXZ 2A30VA MXZ 2A52VA MXZ 4A71VA MXZ 5A100 MXZ 2A40VA MXZ 3A54VA MXZ 4A80VA SYMBOL IPM CB1 3 CT1 2 CT61 L PFC R64A R64B X64 NAME INTELLIGENT POWER MODULE SMOO...

Page 151: ...ching method has the feature of lower energy loss compared to active filter method In addition output and efficiency is enhanced by combining with vector controlled inverter in order to boost the voltage of power supplied to IPM Input current waveform without PAM Due to the time of no electricity Power factor gets worse Harmonic gets increased Input voltage Energized time is short in case L induct...

Page 152: ...ontrol provides the most efficient waveform corresponding to the rotation times of compressor motor The rotation can be set to higher compared to the conventional motor drive system So the time in which air conditioner can be operated with energy saved is longer than conventional models This can save annual electric consumption Compared to square wave control the torque pulsation is reduced at rot...

Page 153: ...ulse slightly opened MXZ 4A80VA 5A 100 59pulse Thermostat ON in COOL or DRY mode Opening before stop 500 pulse in 15 minutes When the outdoor unit operates When the other indoor unit operates 5 pulse When outdoor unit stops When the other indoor unit stops or thermo off Maintain LEV opening before stop 500 pulse in 15 minutes When the outdoor unit operates When the other indoor unit operates 59 pu...

Page 154: ...usive LEV becomes 100 pulse or less in cooling operation or so does that of Receiver LEV in heating operation 1 2 3 4 5 200 300 400 450 500 Standard No Number of operating indoor units MXZ 3A54VA MXZ 4A71VA 1 unit 150 320 360 410 500 2 units 250 320 370 420 500 3 units 250 320 380 430 500 4 units MXZ 4A71VA 4 units MXZ 4A71VA 120 140 160 220 280 1 unit 120 140 160 220 280 2 units 120 140 160 220 2...

Page 155: ... capacity Difference in operation number COOL HEAT 3 3 6 6 Code7 8 9 9 Code9 10 12 52 Code11 12 15 55 25 65 35 75 Code13 14 Code15or above 2 20 0 3 30 0 4 40 0 MXZ 3A54VA MXZ 4A71VA Standard opening pulse 01 02 03 04 05 06 07 08 COOL LEV Opening code HEAT 240 200 260 220 280 250 300 280 330 300 350 320 370 340 390 360 09 400 380 10 410 400 Code5 6 Code3 4 Difference in capacity Difference in opera...

Page 156: ... 83 90 COOL HEAT Target discharge temperature MXZ 2A30VA MXZ 2A40VA E2 156 Capacity code Indoor unit capacity kw 3 2 2 4 2 5 7 3 5 10 5 0 12 6 0 13 7 1 Capacity code Standard opening pulse 01 02 03 04 05 06 07 08 COOL LEV Opening code HEAT 270 140 280 152 290 160 300 170 310 180 320 200 330 224 340 244 09 350 274 10 360 280 3 2 Difference in operation number COOL HEAT 28 45 56 60 4 84 60 5 112 60 ...

Page 157: ...5 80 3 units 57 57 63 65 70 73 75 80 82 82 4 units 59 60 65 67 72 74 75 80 84 84 1 unit 52 58 65 68 68 68 68 68 68 78 2 units 62 66 74 78 78 78 78 78 78 78 3 units 50 55 60 67 72 76 76 76 76 76 4 units 50 55 60 67 72 76 76 76 76 76 COOL HEAT Target discharge temperature MXZ 4A80VA E1 Operation frequency of compressor Hz Minimum 14 15 23 24 32 33 41 42 50 51 59 60 68 69 77 78 86 87 Maximum 1 unit 3...

Page 158: ... 4A71VA Discharge temperature LEV opening correction pulse More than Target discharge temperature 12 Target discharge temperature 12 to Target discharge temperature 5 Target discharge temperature 5 to Target discharge temperature 3 Target discharge temperature 3 to Target discharge temperature 3 Target discharge temperature 3 to Target discharge temperature 5 Target discharge temperature 5 to Targ...

Page 159: ...05 105 HEAT Hz Defrost 72 90 100 100 Number of operating unit MXZ 2A52VA 1 2 Capacity code 3 4 7 11 Min 12 12 16 COOL Hz Max 48 48 70 DRY Hz 25 30 52 Min 20 20 40 Max 70 70 70 HEAT Hz Defrost 70 70 70 Number of operating unit MXZ 2A40VA E1 1 2 3 4 W Capacity code 3 4 7 10 12 13 7 8 10 11 13 14 16 17 9 12 Min 20 20 20 20 20 30 30 30 30 20 40 52 COOL Hz Max 65 85 100 100 100 105 105 105 105 105 105 ...

Page 160: ...ample the first defrost interval is 40 minutes long and the second is 45 minutes long The third and sub sequent intervals are set to be longer and less frequent depending on defrosting time The third and subsequent defrost intervals follow any of the three patterns 5 or 10 to 20 minutes longer the same or 5 or 10 to 20 minutes shorter compared with the previous defrost interval with the longest 12...

Page 161: ... 4A80VA 100 C 4A80VA 5A or less the controls starts the compressor 2 Compressor operation frequency When temperature of the discharge temperature thermistor is expected to be higher than 116 the control decreases 12Hz from the current frequency When temperature of the discharge temperature thermistor is expected to be higher than 111 and less than 116 the con trol decreases 6Hz from the current fr...

Page 162: ...ature 30min 30min 30min 30min 30min 30min 15min 30min 15min 30min Pre heat ON OFF Breaker ON 20 Stop operation Start operation When outside temperature is above 20 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 12 9 COOL OPERATION 2 Coil frost prevention The compressor operational frequency is contro...

Page 163: ... as same as COOL mode 12 9 2 1 Thermostat control Thermostat is ON or OFF by difference between room temperature and set temperature ON 1 or more OFF less than 1 1 0 7 Room temperature minus set temperature During operation Room temperature minus set temperature Initial Thermostat 1 Thermostat control Thermostat is ON or OFF by difference between room temperature and set temperature ON less than 2...

Page 164: ... LTD Distributed in Mar 2007 No OBT06 REVISED EDITION D 7 Distributed in Oct 2006 No OBT06 REVISED EDITION C 7 Distributed in Mar 2006 No OBT06 REVISED EDITION B 7 Distributed in Aug 2005 No OBT06 REVISED EDITION A 8 Distributed in May 2005 No OBT06 8 Made in Japan HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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Mitsubishi Electric MSC-CA20VB, Service Technical Manual

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