Mitsubishi Electric MSY-ANA - Manuals

Page 3 - MS MICROPROCESSOR CONTROL ··························································· 4; MSZ, MSY MICROPROCESSOR CONTROL ··············································· 7; Indoor unit models; MXZ MICROPROCESSOR CONTROL ······················································· 21; Outdoor unit models

1. MS MICROPROCESSOR CONTROL ··························································· 4 Indoor unit models Outdoor unit models MS-A09WA MU-A09WA MS-A12WA MU-A12WA 1-1. COOL OPERATION ··············································································· 4 1-2. DRY OPERATION ·············...

Page 4 - MS MICROPROCESSOR CONTROL; Indoor fan speed control; Coil frost prevention

4 MS MICROPROCESSOR CONTROL 1 1-1. COOL ( ) OPERATION MS-A•WA MU-A•WA 2. Indoor fan speed control Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In AUTO the fan speed is as follows. 1. Thermostat control Thermostat is ON or OFF by ...

Page 7 - MSZ,MSY MICROPROCESSOR CONTROL

7 MSZ,MSY MICROPROCESSOR CONTROL 2 2-1. COOL ( ) OPERATION 2. Indoor fan speed control Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF-ON.In AUTO the fan speed is as follows. 1. Thermostat control Thermostat is ON or OFF by difference ...

Page 9 - Gradation of fan speed in initial

9 (2) Cold air prevention control MSZ-A09/12/15/17 MSZ-FD MSZ-D When the compressor is not operating, ( ) if the temperature of room temperature thermistor is less than 66 °F, the fan stops. ( ) if the temperature of room temperature thermistor is 66 °F or more and ( ) if the temperature of indoor c...

Page 10 - Time chart of defrosting in HEAT mode (reverse type)

set position set speed set position set speed Indoor fan Compressor normal Outdoor fan R.V. coil (21S4) OFF (COOL) OFF Maximum frequency horizontal Horizontal vane Very Low (temperature of indoor coil thermistor > 64 °F) 30 seconds 30 seconds 30 seconds 40 seconds 5 seconds 5 seconds 40 seconds O...

Page 11 - MUZ

11 (2) Mode change In case of the following conditions, the operation mode is changed. COOL mode changes to HEAT mode when 15 minutes have passed with the room temperature 4 °F below the set temperature. HEAT mode changes to COOL mode when 15 minutes have passed with the room temperature 4 °F above ...

Page 12 - Function of main parts

12 <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 downward blow has been fi...

Page 14 - Input voltage; At normal operation

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 Energized time is short in case L inductance is small. No electricity runs intodiode module because thevoltage at both sides of sm...

Page 17 - -8. OPERATIONAL FREQUENCY CONTROL OF OUTDOOR UNIT

17 2-8. OPERATIONAL FREQUENCY CONTROL OF OUTDOOR UNIT 1. Outline The operational frequency is as following:First, the target operational frequency is set based on the difference between the room temperature and the set tem-perature.Second, the target operational frequency is regulated by discharge t...

Page 19 - Operational frequency; LEV opening degree

19 (2) Time chart OFF Time Time ON Operational frequency of the compressor Commandedto open Standardopening degree Opening degree is corrected accordingto discharge temperature. Positioning Air conditioner ON Air conditioner OFF(thermostat off) LEV opening degree about 5 minutes <COOL, DRY>abo...

Page 21 - MXZ MICROPROCESSOR CONTROL

21 MXZ MICROPROCESSOR CONTROL 3 3-1. INVERTER SYSTEM CONTROL MXZ-A•NA POWERSUPPLY NOISEFILTERCIRCUIT RESISTOR RELAY SMOOTHINGCAPACITOR CURRENTTRANSFORMER COMPRESSOR REACTOR P W V U N IPM PFC U W MS 3~ V + 3-1-1. Inverter main power supply circuit Function of main parts NAME FUNCTION INTELLIGENT POWE...

Page 22 - Elimination of electrical noise

22 3. Power factor improvement Booster coil reactor and PFC rectify AC to DC and control its voltage.In the motor drive system of sine wave control, power factor can be improved by reducing harmonics. PFC and reactor stabi-lize the voltage of DC supplied to inverter circuit and make its waveform smo...

Page 23 - NOTE

23 3-2. EXPANSION VALVE CONTROL (LEV CONTROL) Linear expansion valve (LEV) is controlled by “Thermostat ON” commands given from each unit. Indoor unit status LEV opening Stop of all indoor unit Opening before stop → 500 pulse in 15 minutes When outdoor unit is operating, some indoor units stop and s...

Page 30 - -5. DISCHARGE TEMPERATURE PROTECTION CONTROL

30 3-6. OUTDOOR FAN CONTROL Fan speed is switched according to the number of operating indoor unit and the compressor frequency. 3-5. DISCHARGE TEMPERATURE PROTECTION CONTROL This protection controls the compressor ON/OFF and operation frequency according to temperature of the discharge tempera-ture...

Page 31 - Compressor uses 50 W when pre-heat control is turned ON.; Coil frost prevention; ON

31 1. Pre-heat control is turned ON for 15 or 30 min, after the breaker is turned ON.2. 30 min. after the unit is stopped, pre-heat control is turned ON for 15 or 30 min. and turned OFF for 30 min." This is repeated as shown in the graph until the breaker is turned OFF. When outside temperature ...