Mitsubishi Electric MSZ-GA22VA-E1 Service Manual

SERVICE TECHNICAL GUIDECONTENTS1. MSC MICROPROCESSOR CONTROL················62. MS MICROPROCESSOR CONTROL ················153. MSH MICROPROCESSOR CONT

10ModeCOOL mode of"I FEEL CONTROL"DRY mode of"I FEEL CONTROL"HEAT mode of"I FEEL CONTROL"Initial room temperatureInit

100MCF MICROPROCESSOR CONTROL7WIRELESS REMOTE CONTROLLEROnce the operation mode is set, the same operation modecan be repeated by simply turning OPERA

101❈1 When the system is restarted with the remote controller, the system operates with the previous set temperature regard-less of the room temperatu

102Compressor and Outdoor fan motorOFFONIndoor fan motorON (continuously at set speed)ONOFF7-1-2. DRY mode of “I FEEL CONTROL”The system for dry

1037-5. AUTO VANE OPERATION(1) Vane motor driveThis series is equipped with a stepping motor for the vane. The rotating direction, speed, and angle of

104(8) ECONO COOL ( ) operation (ECONOmical operation)When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2°C higher.

1057-6. TIMER OPERATION1. How to set the timer (1) Press OPERATE/STOP(ON/OFF) button to start the air conditioner.(2) Check that the current time is s

106MCFH MICROPROCESSOR CONTROL8WIRELESS REMOTE CONTROLLEROnce the operation mode is set, the same operation modecan be repeated by simply turning OPER

107② Time controlWhen the three conditions as follows have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes.The indoor fan ope

108CompressorOutdoor fanIndoor fanONOFF(continuously at set speed)OFFONONOperation chartExample8-1-2. DRY mode of “I FEEL CONTROL”The system for dry o

109(3) Warm air controlWhen compressor starts in heating operation or after defrosting, the fan changes the speed due to the indoor coil ther-mistor R

11High HighMed.LowCOOL and DRY operationHEAT operation <MUH-GA20/GA25/GA35VB>Vane angle is fixed to Angle 1.Vane angle is fixed to Angle 4.1-6.

1104. DefrostingDefrosting of outdoor heat exchanger is controlled by DEICER P.C. board, with detection by the defrost thermistor RT61.(1) Starting co

1118-3. DRY ( ) OPERATION(1) Press OPERATE/STOP(ON/OFF) button.OPERATION INDICATOR lamp of the indoor unit turns on with abeep tone.(2) Select DRY mod

112(5) STOP (operation OFF) and ON-TIMER standbyWhen the following cases occur, the vane returns to the closed position.(a) When OPERATE/STOP (ON/OFF)

113(3) Press ON/OFF TIMER buttons to select the operation.“ON-TIMER” button ... AUTO START operation (ON timer)“OFF-TIMER” button ... AUTO STOP operat

1148-7. EMERGENCY / TEST OPERATIONIn case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the front of the indoorunit.

115MFZ MICROPROCESSOR CONTROL9Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP(ON/OFF) button ON

1162. Indoor fan speed controlIndoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In A

1171.7 :2.0 :Set temperatureDifference between roomtemperature and set tem-perature during operation1. Thermostat controlThermostat is ON or OFF by di

1183. High pressure protectionIn HEAT operation the indoor coil thermistor detects the temperature of the indoor heat exchanger. The compressor opera-

119Time chart of defrosting in HEAT mode (reverse type)set positionset speedset positionset speedIndoor fan (upper)Compressor normalOutdoor fanR.V. co

12(7) Cold air prevention in HEAT operation <MUH-GA20/GA25/GA35VB>When any of the following conditions occurs in HEAT operation, the horizontal

120HighMed.LowSuper HighSuper HightimeRotational frequency9-5. INDOOR FAN MOTOR CONTROL(1) Rotational frequency feedback controlThe indoor fan motor i

121(4) VANE AUTO ( ) modeThe microprocessor automatically determines the vane angle and operation to make the optimum room temperature dis-tribution.(

122 Set the air outlet selection switch to . Set the air outlet selection switch to .Air blows out automatically from the upper and lower air out-let

123(11) ECONO COOL ( ) operation (ECONOmical operation)When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2°C higher

124Usage of i-save operation:1.Using as a low-energy modei-save operation can be used as a low-energy mode by setting the temperature 2–3: warmer than

1259-9. TIMER OPERATION1. How to set the timer(1) Press OPERATE/STOP (ON/OFF) button to start the air conditioner.(2) Check that the current time is s

126EMERGENCY OPERATION switchE.O.SWOperation mode COOL HEATSet temperature24:24:Fan speed Medium MediumHorizontal vane Auto Auto• The following indica

127MSZ-HA MICROPROCESSOR CONTROL10Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP(ON/OFF) butto

1282. Indoor fan speed controlIndoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In A

1293. High pressure protectionIn HEAT operation the indoor coil thermistor detects the temperature of the indoor heat exchanger. The compressor opera-

LightedNot lightedPress once <Cool>Press again <Heat>Press once again <Stop>w Heat is available only in MUH-GA20/GA25/GA35VB.13EMERG

130Time chart of defrosting in HEAT mode (reverse type)set positionset speedset positionset speedIndoor fanCompressor normalOutdoor fanR.V. coil (21S4

131(4) VANE AUTO ( ) modeThe microprocessor automatically determines the vane angle and operation to make the optimum room temperature dis-tribution.H

132The air conditioner starts heat-ing operation approx. 3 minutesafter the vane has moved to thehorizontal position.• Sometimes the areaaround your f

13310-6. TIMER OPERATION (ON/OFF TIMER)SELECT(OFF TIMER) (ON TIMER) TIMER RELEASE SELECT(1) Press OPERATE/STOP (ON/OFF) button to start the air co

13410-8. INVERTER SYSTEM CONTROL10-8-1. Inverter main power supply circuitPOWER P.C. BOARDPowersupplyINVERTER P.C. BOARDR64A R64BCTTR821DB65X64L62 L63

1354. Intelligent power module IPM consists of the following components · IGBT (x6) : Converts DC waveform to three-phase AC waveform and out

136w The operation frequency in COOL mode is restricted the upper limit frequency after 0.5 ~ 1 hour as shown below for dew prevention.It is rated fre

137MSZ-GB MICROPROCESSOR CONTROL11Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP(ON/OFF) butto

1382. Indoor fan speed controlIndoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In A

1392. Indoor fan speed control (1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.In Auto the fan speed is as follows.Set temperatur

141-10. OUTDOOR UNIT ACTUATOR CONTROLACTUATORONOFFONOFFONOFFON (OPEN)OFF (CLOSE)ON (OPEN)OFF (CLOSE)ON (OPEN)OFF (CLOSE)ON (OPEN)OFF (CLOSE)ON (CLOSE)

140Time chart of defrosting in HEAT mode (reverse type)set positionset speedset positionset speedIndoor fanCompressor normalOutdoor fanR.V. coil (21S4

14111-4. AUTO CHANGE OVER ··· AUTO MODE OPERATIONOnce desired temperature is set, unit operation is switched automatically between COOL and HEAT opera

142(4) VANE AUTO ( ) modeThe microprocessor automatically determines the vane angle and operation to make the optimum room temperature dis-tribution.H

143NOTE: When 2 or more indoor units are operated with multi outdoor unit, even if any indoor unit turns thermostat off,this control doesn’t work in t

144PROGRAM 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 be used in comb

145EMERGENCY OPERATION switchE.O.SWOperation mode COOL HEATSet temperature24:24:Fan speed Medium MediumHorizontal vane Auto AutoThe operation mode is

146 4. Power transistor module IPM consists of the following components. · Power Transistors (x6): Converts DC waveform to three-phase AC wavefor

147w The operation frequency in COOL mode is restricted the upper limit frequency after 1 hour as shown below for dew prevention.It is rated frequency

14811-12. EXPANSION VALVE CONTROL (LEV CONTROL)(1) Outline of LEV controlThe LEV basic control is comprised of setting LEV opening degree to the stand

149In COOL operation, the two indoor coil thermistors (one main and one sub) sense temperature ununiformity (superheat) at the heat exchanger, and whe

152MS MICROPROCESSOR CONTROLWIRELESS REMOTE CONTROLLERModeCOOL mode of"I FEEL CONTROL" DRY mode of"I FEEL CONTROL"Initial room t

15012MXZ MICROPROCESSOR CONTROL12-1. INVERTER SYSTEM CONTROLMXZ-2A30/40/52VA12-1-1. Inverter main power supply circuitPOWER P.C. BOARDPowersupplyINVER

1514. Intelligent power module IPM consists of the following components · IGBT (x6) : Converts DC waveform to three-phase AC waveform and ou

152152 4. Power transistor module IPM consists of the following components. · Power Transistors (x6): Converts DC waveform to three-phase AC wave

15312-2. EXPANSION VALVE CONTROL (LEV CONTROL)Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit.Wh

154The table below shows the role of Exclusive LEV and Receiver LEV in each operation mode.wIn COOL mode, the two indoor coil thermistor (one main and

155Standard opening (pulse)01 02 03 04 05 06 07 08COOLLEV Opening(code)HEAT1261401301461341501381701401801422001822242282440929627210310280Code5,6Code

1 Discharge temperature 2 Each correction • (Each gas pipe temperature thermistor - Minimum gas pipe temperature thermistor)w 1 • (Main indoor coil

157Operation frequency of compressor (Hz)Minimum ~ 2324 ~ 3839 ~ 5455 ~ 6970 ~ 8586 ~ 100101 ~ Maximum1 unit354049586570702 units586065687070703 unit

LEV opening correction (pulse)6[ RT 4[ RT< 6RT<4210Temperature to be decreased (:)6[ RT4[ RT< 6RT<4-10-5-5RTRTb) Correct the L

15912-3. OPERATIONAL FREQUENCY RANGE12Capacitycode3, 47~ 11Min.353535COOL (Hz)Max.586898DRY(Hz)354568Min.353535Max.989898HEAT (Hz)Defrost989898Number

16Previous operationCOOL mode of “I FEEL CONTROL”or COOL mode• Once the mode is fixed, the mode does not change by room temperature afterwards.•

160Number ofoperatingunit1234Capacitycode3, 47101213~ 78 ~ 1011 ~ 1314 ~ 1617 ~9 ~12 ~Min.151515151524242424245263COOL (Hz)Max.58586268798080808080909

161MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA<Control status>The control performs when the all the following status are satisfied;• When one or more indoo

1621. Pre-heat control is turned ON for 15 or 30 minw after the breaker is turned ON.2. 30 min. after the unit is stopped, pre-heat control is turned

16312-10. DRY OPERATION12-11. HEAT OPERATION2. High pressure protectionIn HEAT operation the indoor coil thermistor detects the temperature of the ind

New publication, effective Mar. 2007Specifications subject to change without notice.CCCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistribute

171. Indoor fan speed controlIndoor fan operates at the set speed by FAN SPEED CONTROL button.In AUTO the fan speed is as follows.Initial temperature

182-2. 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

19HighRotational frequencyHightimeMed.Low2-5. INDOOR FAN MOTOR CONTROL(1) Rotational frequency feedback controlThe indoor fan motor is equipped with a

1. MSC MICROPROCESSOR CONTROL·························································6Indoor unit models Outdoor unit modelsMSC-CA20VB MSC-CB20VB MSC

20COOL and DRY operationFAN operationVane angle is fixed to Angle 1.Vane angle is fixed to Angle 4.(4) VANE AUTO ( ) modeThe microprocessor automatica

21(9) LONG MODE ( )By pressing LONG button indoor fan speed becomes faster than setting fan speed on the remote controller, and the hori-zontal vane m

222. CancelTIMER setting can be cancelled with ON/OFF TIMER buttons.To cancel ON timer, press “ON-TIMER” button.To cancel OFF timer, press “OFF-TIMER”

23EMERGENCY OPERATION switchPress once <Cool>Press again <Stop>OPERATION INDICATOR lamp• The following indication applies regardless of

24(1) LEV opening correction by discharge temperatureThe LEV opening is corrected according to the temperature difference between target discharge tem

252 When the temperature difference RT between indoor coil thermistor (main) RT12 and indoor coil thermistor (sub)RT13 in the indoor unit is 2: or mo

26MSH MICROPROCESSOR CONTROL3LightedNot lightedApprox. 2 : or moreDifference between target temperature and room temperatureApprox. 2 : or lessThis sh

27ExamplePrevious operationCOOL mode of “I FEEL CONTROL”or COOL mode• Once the mode is fixed, the mode does not change by room temperature afterwar

281. Indoor fan speed controlIndoor fan operates at the set speed by FAN SPEED CONTROL button.In AUTO the fan speed is as follows.Initial temperature

29Operation time chartExample3. Coil frost prevention • The operation is as same as coil frost prevention during COOL mode of “I FEEL CONTROL”.• Indoo

4. MSZ-CA MICROPROCESSOR CONTROL·················································39Indoor unit models Outdoor unit modelsMSZ-CA25VB MUZ-CA25VBMSZ-

30(2) Cold air prevention controlThe fan runs at set speed when the indoor coil thermistor RT12 temperature exceeds 22°C. The fan operates Low whenthe

31NOTE : During the high pressure protection and for 10 seconds after high pressure protection, defrosting of outdoor heatexchanger is not detected by

32HighRotational frequencyHightimeMed.Low3-5. INDOOR FAN MOTOR CONTROL(1) Rotational frequency feedback controlThe indoor fan motor is equipped with a

33AUTOHorizontal1234 5Middle Downward Swing3-6. AUTO VANE OPERATION1. Horizontal vane(1) Vane motor driveThese models are equipped with a stepping mot

34(10) LONG MODE ( )By pressing LONG button indoor fan speed becomes faster than setting fan speed on the remote controller, and the hor-izontal vane

35612345SWING2. Vertical vane(1) Vane motor driveThese models are equipped with a stepping motor for the vertical vane. The rotating direction, speed,

36EMERGENCY OPERATION switchPress once <Cool>Press again <Heat>Press once again <Stop>OPERATION INDICATOR l

373-9. EXPANSION VALVE CONTROL (LEV CONTROL) <MUH-GA80VB>LEV (Expansion valve) is controlled by “Thermostat ON” commands given from the unit.Con

382 When the temperature difference RT between indoor coil thermistor (main) RT12 and indoor coil thermistor (sub)RT13 in the indoor unit is 2: or mo

394MSZ-CA MICROPROCESSOR CONTROLOnce the operation mode is set, the same operation modecan be repeated by simply turning OPERATE/STOP(ON/OFF) button O

Indoor unit models Outdoor unit modelsMSZ-GA50VA MUZ-GA50VAMSZ-GA60VA MUZ-GA60VAMSZ-GA71VA MUZ-GA71VA6-13. COOL OPERATION ·························

40ExamplePrevious operationCOOL mode of “I FEEL CONTROL” orCOOL modeExamplePrevious operationCOOL mode of “I FEELCONTROL” or COOLmodeWhen the system i

412. Indoor fan speed controlIndoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In AU

424-1-3. HEAT mode of “I FEEL CONTROL” 2. Indoor fan speed control (1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.In Auto the fa

43Gradation of fan speed in initial (example)The upper limit of the fan speed in MANUAL is the set speed.The upper limit of the fan speed in AUTO is t

44Time chart of defrosting in HEAT mode (reverse type)set positionset speedset positionset speedIndoor fanCompressor normalOutdoor fanR.V. coil (21S4)

454-4. DRY ( ) OPERATION(1) Press OPERATE/STOP(ON/OFF) button.OPERATION INDICATOR lamp of the indoor unit turns on with abeep tone.(2) Select DRY mode

46(3) PositioningThe vane presses the vane stopper once to confirm the standard position and then moves to the set angle.Confirming of standard positi

47<SWING operation>In swing operation of ECONO COOL operation mode, the initial air flow direction is adjusted to “Horizontal”.According to the

484-9. EMERGENCY / TEST OPERATIONIn case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the front of the indoorunit.

494-10. INVERTER SYSTEM CONTROL4-10-1. Inverter main power supply circuitPOWER P.C. BOARDPowersupplyINVERTER P.C. BOARDR64A R64BCTTR821DB65X64L62 L63C

10. MSZ-HA MICROPROCESSOR CONTROL·············································127Indoor unit models Outdoor unit modelsMSZ-HA25VA MUZ-HA25VAMSZ-HA3

504. Intelligent power module IPM consists of the following components · IGBT (x6) : Converts DC waveform to three-phase

51w The operation frequency in COOL mode is restricted the upper limit frequency after 1 hour as shown below for dew prevention.It is rated frequency

524-12. EXPANSION VALVE CONTROL (LEV CONTROL)(1) Outline of LEV controlThe LEV basic control is comprised of setting LEV opening degree to the standar

53In COOL operation, the two indoor coil thermistors (one main and one sub) sense temperature ununiformity (superheat) at the heat exchanger, and when

54MSZ-FA MICROPROCESSOR CONTROL5Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP(ON/OFF) button

552. Indoor fan speed controlIndoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In AU

562. Indoor fan speed control (1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.In Auto the fan speed is as follows.Set temperature

575: 8:Defrost heater ONOFF3. High pressure protectionIn HEAT operation the indoor coil thermistor detects the temperature of the indoor heat exchange

58Time chart of defrosting in HEAT mode (reverse type)set positionset speedset positionset speedIndoor fanCompressor normalOutdoor fanR.V. coil (21S4)

59HighMed.LowSuper HighSuper HightimeRotational frequency5-5. INDOOR FAN MOTOR CONTROL(1) Rotational frequency feedback controlThe indoor fan motor is

6MSC MICROPROCESSOR CONTROL1ON/OFFFANTOOWARMTOOCOOLVANEMODEECONO COOL STOP STARTHR.MIN.I FEELCOOLDRY PMCLOCKAMRESETCLOCKHEAT/FAN/Open the fr

60(4) VANE AUTO ( ) modeThe microprocessor automatically determines the vane angle and operation to make the optimum room temperature dis-tribution.Ho

61<SWING operation>In swing operation of ECONO COOL operation mode, the initial air flow direction is adjusted to “Horizontal”.According to the

62i-see Sensori-see Sensor, which is installed on the right side of the air outlet of the indoor unit, is moved with the stepping motor and itdetects

63(4) AREA setting is cancelled when the "cancel" is sellected by pressing AREA button, or when WIDE VANE button is pressed.· Be sure

64PLASMA/WASH lampBlinkingNot lightedLightedWASH reset switchWASHresetE.O.SWEach time this b utton is pressed, the oper ation mode of PLASMA is chang

655-12. TIMER OPERATION1. How to set the timer(1) Press OPERATE/STOP (ON/OFF) button to start the air conditioner.(2) Check that the current time is s

66EMERGENCY OPERATION switchWASHresetE.O.SWOperation mode COOL HEATSet temperature24:24:Fan speed Medium MediumHorizontal vane Auto AutoVertical vane

675-14. INVERTER SYSTEM CONTROL5-14-1. Inverter main power supply circuitPOWER P.C. BOARDPowersupplyINVERTER P.C. BOARDR64A R64BCTTR821DB65X64L62 L63C

684. Intelligent power module IPM consists of the following components · IGBT (x6) : Converts DC waveform to three-phase AC waveform and outp

69w The operation frequency in COOL mode is restricted the upper limit frequency after 1 hour as shown below for dew prevention.It is rated frequency

7CompressorOutdoor fanOFFON( continuously at set speed)Indoor fanONONOFF② Time controlWhen the three conditions as follows have been satisfied for 1 h

705-16. EXPANSION VALVE CONTROL (LEV CONTROL)(1) Outline of LEV controlThe LEV basic control is comprised of setting LEV opening degree to the standar

71In COOL operation, the two indoor coil thermistors (one main and one sub) sense temperature ununiformity (superheat) at the heat exchanger, and when

72MSZ-GA • MSZ-CB MICROPROCESSOR CONTROL6Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP(ON/OFF

732. Indoor fan speed controlIndoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In AU

742. Indoor fan speed control (1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.In Auto the fan speed is as follows.Set temperature

753. High pressure protectionIn HEAT operation the indoor coil thermistor detects the temperature of the indoor heat exchanger. The compressor opera-t

76Time chart of defrosting in HEAT mode (reverse type)set positionset speedset positionset speedIndoor fanCompressor normalOutdoor fanR.V. coil (21S4)

77HighMed.LowSuper HighSuper HightimeRotational frequency6-5. INDOOR FAN MOTOR CONTROL(1) Rotational frequency feedback controlThe indoor fan motor is

78(4) VANE AUTO ( ) modeThe microprocessor automatically determines the vane angle and operation to make the optimum room temperature dis-tribution.Ho

79<SWING operation>In swing operation of ECONO COOL operation mode, the initial air flow direction is adjusted to “Horizontal”.According to the

84. Coil frost preventionThe operation is as same as coil frost prevention during COOL operation.(Refer to 1-1.3.)However when coil frost prevention w

80EMERGENCY OPERATION switchE.O.SWOperation mode COOL HEATSet temperature24:24:Fan speed Medium MediumHorizontal vane Auto AutoThe operation mode is i

816-10. INVERTER SYSTEM CONTROL6-10-1. Inverter main power supply circuitPOWER P.C. BOARDPowersupplyINVERTER P.C. BOARDR64A R64BCTTR821DB65X64L62 L63C

824. Intelligent power module IPM consists of the following components · IGBT (x6) : Converts DC waveform to three-phase AC waveform and outp

83w The operation frequency in COOL mode is restricted the upper limit frequency after 1 hour as shown below for dew prevention.It is rated frequency

846-12. EXPANSION VALVE CONTROL (LEV CONTROL) MUZ-GA35(1) Outline of LEV controlThe LEV basic control is comprised of setting LEV opening degree t

85In COOL operation, the two indoor coil thermistors (one main and one sub) sense temperature ununiformity (superheat) at the heat exchanger, and when

86WIRELESS REMOTE CONTROLLERON/OFFTOOCOOLTOOWARMLONGSignal transmitting sectionOperation display sectionOPERATE /STOP(ON /OFF)buttonTEMPERATURE button

87The system for dry operation uses the same refrigerant circuit as the cooling circuit.The compressor and the indoor fan are controlled by the room t

882. Indoor fan speed control (1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.In Auto the fan speed is as follows.Set temperature

89Time chart of defrosting in HEAT mode (reverse type)set positionset speedset positionset speedIndoor fanCompressor normalOutdoor fanR.V. coil (21S4)

9(3) Warm air controlWhen the following any conditions of 1 (a. ~ c.) and the condition of 2 are satisfied at the same time, warm air controlworks.1 a

906-16. AUTO CHANGE OVER ··· AUTO MODE OPERATIONOnce desired temperature is set, unit operation is switched automatically between COOL and HEAT operat

916-18. OUTDOOR FAN MOTOR CONTROLFan speed is switched according to the compressor frequency.COOLFan speedUpDownUpDownModeHEATCompressor frequencyMUZ-

92SWING operationIn swing operation of ECONO COOL operation mode, the initial air flow direction is adjusted to “Horizontal”.According to the temperat

93(10) LONG MODE ( )By pressing LONG button indoor fan speed becomes faster than setting fan speed on the remote controller, and the hor-izontal vane

946-20. TIMER OPERATION1. How to set the timer(1) Press OPERATE/STOP (ON/OFF) button to start the air conditioner.(2) Check that the current time is s

956-21. EMERGENCY / TEST OPERATIONIn case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the front of the indoorunit.

96 4. Power transistor module IPM consists of the following components. · Power Transistors (x6): Converts DC waveform to three-phase AC waveform

97w The operation frequency in COOL mode is restricted the upper limit frequency after 1 hour as shown below for dew prevention.It is rated frequency

986-24. EXPANSION VALVE CONTROL (LEV CONTROL)(1) Outline of LEV controlThe LEV basic control is comprised of setting LEV opening degree to the standar

99In COOL operation, the two indoor coil thermistors (one main and one sub) sense temperature ununiformity (superheat) at the heat exchanger, and when