Summary of Contents for Mitsubishi Heavy Industries SRF25ZMXA-S
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Manual No.'14•SRF-T-163 RESIDENTIAL AIR-CONDITIONING TECHNICAL MANUAL & PARTS LIST FLOOR STANDING TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) SRF25ZMXA-S SRF35ZMXA-S SRF50ZMXA-S...
'14 • SRF-T-163 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor units ..................(2) Outdoor units .................................... 10 3. ELECTRICAL WIRING ................12 (1) Indoor units ..................12 (2) Outdoor units ..................13 4. NOISE LEVEL .................... 15 5.
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'14 • SRF-T-163 10. MAINTENANCE DATA ................59 (1) Cautions ..................... 59 (2) Items to check before troubleshooting ..........59 ..59 (3) Troubleshooting procedure (If the air conditioner does not run at all) ..... 60 (4) Troubleshooting procedure (If the air conditioner runs) (5) Self-diagnosis table ................
'14 • SRF-T-163 1. SPECIFICATIONS SRF25ZMXA-S Model n i l y t i ) ) . y t i ) ) . n i l 2.6 / 2.5 / 2.4 (220/ 230/ 240 V ) Running Cooling 3.6 / 3.4 / 3.3 (220/ 230/ 240 V )
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'14 • SRF-T-163 SRF35ZMXA-S Model n i l y t i ) ) . y t i ) ) . n i l 1.26 ) 1.43 ) n i l Operation n i l % data n i l n i l Sound power level dB(A)
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'14 • SRF-T-163 SRF50ZMXA-S Model n i l y t i ) ) . y t i ) ) . n i l 1.70 ) 2.15 ) n i l Operation n i l % data n i l n i l Sound power level n i l...
'14 • SRF-T-163 (2) Outdoor units Models SRC25ZMXA-S, 35ZMXA-S RCV000Z018...
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'14 • SRF-T-163 Model SRC50ZMXA-S RCT000Z008...
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'14 • SRF-T-163 (3) Remote control (a) Wireless remote control Unit : mm...
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'14 • SRF-T-163 (b) Wired remote control (option parts) Interface kit (SC-BIKN-E) is required to use the wired remote control. Wiring outlet Cut off the upper thin part of remote control lower case with a nipper or knife, and grind burrs with a file etc. Exposed mounting In case of pulling out In case of pulling out...
'14 • SRF-T-163 4. NOISE LEVEL Model SRF25ZMXA-S Condition ISO-T1, JIS C 9612 (Indoor Unit) Mike position Model SRF25ZMXA-S Cooling 40 dB(A) Noise Mike position Unit Level Heating 40 dB(A) × ..Cooling, Heating Mike position 0.8m Unit Mike position (Center &...
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'14 • SRF-T-163 Model SRF35ZMXA-S Condition ISO-T1, JIS C 9612 (Indoor Unit) Mike position Model SRF35ZMXA-S Mike position Noise Cooling 41 dB(A) Unit Level Heating 41 dB(A) × ..Cooling, Heating Mike position 0.8m Unit Mike position (Center & Low points) 1000 2000 4000...
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'14 • SRF-T-163 Model SRF50ZMXA-S Condition ISO-T1, JIS C 9612 (Indoor Unit) Mike position Model SRF50ZMXA-S Mike position Noise Cooling 46 dB(A) Unit Level Heating 47 dB(A) × ..Cooling, Heating N 7 0 N 6 0 N 5 0 N 4 0 Mike position N 3 0...
'14 • SRF-T-163 6. RANGE OF USAGE & LIMITATIONS RANGE OF USAGE & LIMITATIONS Models SRF25,35ZMXA-S SRF50ZMXA-S Item Cooling operation : Approximately 18 to 32℃ D.B. Indoor return air temperature Heating operation : Approximately 10 to 30℃ D.B. (Upper, lower limits) (Refer to the selection chart) Cooling operation : Approximately -15 to 46℃...
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'09•SRK-DB-087D '14 • SRF-T-163 (2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping Piping length [m] Cooling 0.99 0.975 0.965 0.95 0.935 Heating (3) Correction relative to frosting on outdoor heat exchanger during heating Air inlet temperature of 5 or more outdoor unit in °C WB...
'14 • SRF-T-163 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by wireless remote control Operation section Transmission section OPERATION MODE select button ON/OFF (luminous) button Each time the button is pressed, the mode changes. Press to start operation, press again to stop.
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'14 • SRF-T-163 (2) Unit ON/OFF button When the wireless remote control batteries become weak, or if the wireless remote control is lost or malfunctioning, this button may be used to turn the unit on and off. Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. Details of operation The unit will go into the automatic mode in which it automatically determines, from indoor temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes.
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'14 • SRF-T-163 (5) Selection of the annual cooling function (a) The annual cooling function can be enabled or disabled by means of the jumper wire (J172) on the indoor unit PCB and the dip switch (SW2-4) on the interface kit (option) PCB. Interface kit Jumper wire (SC-BIKN-E)
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'14 • SRF-T-163 Flap control Control the flap by AIRFLOW (UP/DOWN) button on the wireless remote control. Flap Each time when you press the AIRFLOW (UP/DOWN) button the mode changes as follows. (Flap stopped) (Swing) Angle of Flap from Horizontal Remote control display COOL , DRY, FAN...
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The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period. (11) Silent mode As “Silent mode start” signal is received from the wireless remote control, it operates by dropping the outdoor fan tap and the compressor command speed. SRF25ZMXA-S SRF35ZMXA-S SRF50ZMXA-S Cooling Heating Cooling Heating Cooling Heating...
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Fuzzy operation Deviation between the room temperature setting correction temperature and the return air temperature is calculated in accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed. Model SRF25ZMXA-S SRF35ZMXA-S SRF50ZMXA-S Fan speed...
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Fuzzy operation During the fuzzy operation, the air flow and the compressor speed are controlled by calculating the difference between the room temperature setting correction temperature and the return air temperature. Model SRF25ZMXA-S SRF35ZMXA-S SRF50ZMXA-S Fan speed 20 - 72rps...
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'14 • SRF-T-163 (15) Outline of dry (dehumidifying) operationion Purpose of DRY mode The purpose is "Dehumidification", and not to control the humidity to the target condition. Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling. Outline of control Indoor unit fan speed and compressor are controlled by the area which is selected by the temperature difference.
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'14 • SRF-T-163 When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is se- lected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode. Setting temperature can be adjusted within the following range.
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'14 • SRF-T-163 Frost prevention control (During cooling or dehumidifying) Operating conditions Indoor heat exchanger temperature (Th) is lower than ºC. compressor command minutes after reaching the compressor command speed except 0 rps. speed (ii) Detail of anti-frost operation Lower Indoor heat exchanger temperature limit...
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'14 • SRF-T-163 Cooling high pressure control Purpose: Prevents anomalous high pressure operation during cooling. (ii) Detector: Outdoor heat exchanger sensor (TH) (iii) Detail of operation: Models SRF, Model SRF0 TH2 > = 32ºC Outdoor heat exchanger Outdoor heat exchanger temperature (ºC) temperature (ºC) TH2 <...
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'14 • SRF-T-163 Heating high pressure control Purpose: Prevents anomalous high pressure operation during heating. (ii) Detector: Indoor heat exchanger sensor (Th) (iii) Detail of operation: (Example) Fuzzy 4rps 8rps After lapse of 20 (10) sec. or over 4rps 8rps After lapse of 20 (10) sec.
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calculation exceeds the upper limit, the upper limit value is maintained. The lower limit of compressor command speed is set to 40 rps and even if the calculated result becomes lower than that after fuzzy calculation, the speed is kept to 40 rps. However, when the thermo OFF, the speed is reduced to '14 •...
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'14 • SRF-T-163 • Model SRF50 Operating conditions: When the outdoor air temperature (TH) is lower than ºC or higher continues for 0 sec- onds while the compressor command speed is other than 0 rps. The lower limit compressor command speed is change as shown in the figure below. (ii) Detail of operation: Lower limit 45 rps Lower limit 35 rps...
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'14 • SRF-T-163 (k) Current cut Purpose: Inverter is protected from overcurrent. (ii) Detail of operation: Output current from the inverter is monitored with a shunt resistor and, if the current exceeds the setting value, the compressor is stopped immediately. Operation starts again after a delay time of minutes.
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'14 • SRF-T-163 (ii) Heating Operating conditions: When the outdoor air temperature (TH) is ºC or lower continues for 0 seconds while the compressor command speed is other than 0 rps. 2) Detail of operation: The outdoor fan is stepped up by speed step at each 0 seconds. (Upper limit th speed) 3) Reset conditions: When either of the following conditions is satisfied The outdoor air temperature (TH) is ºC or higher.
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'14 • SRF-T-163 (18) DRED This air conditioner complies with the DRED (Demand Response Enabling Devices) standard AS/NZS4755.3.1 and supports below demand response modes 1, 2, and 3 (DRM1, 2, and 3). Since the air conditioner limits the electric power or energy by receiving the DRED input signal, the feeling of cooling operation or heating operation may deteriorate during that time.
'09•SRK-DB-087D '14 • SRF-T-163 Reference Reference 10. MAINTENANCE DATA 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT (1) Cautions (2) Items to check before troubleshooting (3) Troubleshooting procedure (If the air conditioner does not run at all) Important wireless proced-...
'14 • SRF-T-163 (5) Self-diagnosis table Wired Outdoor Indoor unit display panel remote Description control PCB Cause Display (flashing) condition control TIMER of trouble Red LED display light light When a heat exchanger sensor 1 wire disconnection is detected while •...
'09•SRK-DB-087D '14 • SRF-T-163 (6) Service mode (Trouble mode access function) (a) Explanation of terms Explanation Term The service mode is the mode where service data are displayed by flashing of the display lights Service mode when the operations in item (b) below are performed with the indoor controller. These are the contents of error displays and protective stops which occurred in the past in the air conditioner system.
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'09•SRK-DB-087D '14 • SRF-T-163 4-time flash 2-time flash. wireless mode mode Self-diagnosis data wireless mode mode Wireless remote control setting Contents of output data Operation mode Fan speed mode wireless Indicates the number of Wireless remote control setting occasions previous to the present Temperature setting the error display data are from.
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'09•SRK-DB-087D '14 • SRF-T-163 (Example) Wireless remote control setting Operation Displayed data Fan speed Temperature mode mode setting Displays the reason for the stop (error code) the previous time an error was displayed. 21ºC Displays the reason for the stop (error code) 2 times previous when an error was displayed. 22ºC Cooling 23ºC...
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'09•SRK-DB-087D '14 • SRF-T-163 (c) Error code, stop code table Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light Error coad light (10's digit) (1's digit) Normal Can not receive signals for 35 Power supply is faulty.
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'09•SRK-DB-087D '14 • SRF-T-163 4-time flash 2-time flash. (d) Operation mode, Fan speed mode information tables (ii) mode mode Display pattern when Display pattern when Fan speed in service mode in service mode Operation mode mode when when there is an there is an RUN light TIMER light...
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'09•SRK-DB-087D '14 • SRF-T-163 (e) Temperatare information Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor temperature. Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal Sensor name...
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'09•SRK-DB-087D '14 • SRF-T-163 (ii) Discharge pipe sensor temperature. Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal -64ºC data 0.1 sec.
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'09•SRK-DB-087D '14 • SRF-T-163 Service data record form Wireless r Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless...
'09•SRK-DB-087D '14 • SRF-T-163 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Sensor temperature characteristics (Room Discharge pipe sensor temperature characteristics temp., indoor heat exchanger temp., out- door heat exchanger temp., outdoor air temp.) - 10 Temperature (˚C)
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'09•SRK-DB-087D '14 • SRF-T-163 Current cut Compressor lock, Compressor wiring short circuit, Compressor output is open phase, Outdoor PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty. * * SRC25, 35 : 1.703Ω (U-V, V-W, U-W) or more at 20ºC SRC50 : 0.864Ω...
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'09•SRK-DB-087D '14 • SRF-T-163 Over heat of compressor Gas shortage, defective discharge pipe sensor Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB ② ③ ② ③ ① ②...
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'09•SRK-DB-087D '14 • SRF-T-163 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB ◆ Notes (1) Check coil wire resistance, see page 71. wire . Outdoor fan motor error Defective fan motor, connector poor connection, defective outdoor PCB...
'14 • SRF-T-163 (8) Phenomenon observed after shortcircuit, wire breakage on sensor (a) Indoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Room temperature sensor Heating Freezing cycle system protection trips and stops the compressor. Cooling Heat exchanger sensor Heating Cooling Humidity sensor...
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Replace indoor PCB. blocks ② and ③ oscillating between DC 0 and 20V? '14 • SRF-T-163 Indoor electrical components are normal. (b) Indoor unit fan motor check procedure 1) Indoor PCB output check ① ④ ⑤ DC several V (–) DC 308 - 336V (4 - 6 V) Measuring...
Operation SW ON Measure in this section '14 • SRF-T-163 (10) How to make sure of wireless remote control wireless wireless wireless wireless wireless wireless Simplified check methd of wireless remote control It is normal if the signal transmission section of the wireless remote control emits a whitish light at each transmission on the monitor of digital camera or camera of mobile phone.
'14 • SRF-T-163 (12) Outdoor unit inspection points Models SRC25ZMXA-S, 35ZMXA-S ◆Check point of outdoor unit CAUTION- HIGH VOLTAGE ◆Power source and serial signal inspection High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the : AC 220/230/240V unit is stopped.
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'14 • SRF-T-163 Model SRC50ZMXA-S ◆Check point of outdoor unit CAUTION- HIGH VOLTAGE ◆Power source and serial signal inspection High voltage is produced in the control box. Don't touch : AC 220/230/240V electrical parts in the control box for 5 minutes after the : AC 220/230/240V unit is stopped.
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'09•SRK-DB-087D '14 • SRF-T-163 (a) Inspection of electronic expansion valve (ii) (iii) (iv) • Inspection of electronic expansion valve as a separate unit Measuring point Resistance when normal (b) Outdoor unit fan motor check procedure ② Measuring Voltage range when point normal...
'14 • SRF-T-163 11. OPTION PARTS Installation manual for wired remote controller PJA012D730 Connect the remote control co (1) Wired remote control (RC-E5) terminal block. Connect the terminal of remo Read together with indoor unit's installation manual. with the terminal of indoor uni (X and Y are no polarity) WARNING Wiring route is as shown in th...
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'14 • SRF-T-163 mote controller Connect the remote control cord to the Sheath Sheath The range of temperature setting Upper Upper terminal block. When shipped, the range of set tempera Connect the terminal of remote control (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30°C (55 ~ 86°F)
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'14 • SRF-T-163 PJA0 12 D73 0 Sheath eath The range of temperature setting Upper When shipped, the range of set temperature differs depending on the operation mode as below. er case Upper case Board Heating : 16 - 30°C (55 - 86°F) Except heating (cooling, fan, dry, automatic) : 18 - 30°C (62 - 86°F) Upper limit and lower limit of set temperature can be changed with remote control.
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'14 • SRF-T-163 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote control and indoor unit are connected. As long as they are used in a typical manner, there wiil be no need to change the initial settings. If you would like to change the initial setting marked “...
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'14 • SRF-T-163 Note 1: The initial setting marked “ ” is decided by connected indoor and outdoor unit, and is automatically defined as following table. Item Function No. Default Model "Auto-RUN" mode selectable indoor unit. Remote control function02 Indoor unit without "Auto-RUN" mode Indoor unit with two or three step of air flow setting Remote control function06...
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'14 • SRF-T-163 PJA012D730 utomatically defined as following table. Operation message How to set function e indoor unit. Function description: Function No. Stop air-conditioner and press (SET) (MODE) setting description: N" mode buttons at the same time for over three seconds, and the step of air flow setting "FUNCTION SET "...
'14 • SRF-T-163 (2) Interface kit (SC-BIKN-E) RKZ012A088B Accessories included in package Safety precautions Before use, please read these Safety Precautions thoroughly before installation. Be sure to check all the accessories included in package. ●All the cautionary items mentioned below are important safety related items to be taken into consideration, so be sure to observe them at all times.
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'14 • SRF-T-163 Installation of the interface ・Install the interface within the range of the connection cable length from the indoor unit. (approximately 1.8m) Wiring inlet ・Be sure not to extend the connection cable on site. If the connection cable is extended, malfunction may occur. ・Fix the interface on the wall, pillar or the like.
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'14 • SRF-T-163 Functions of CNT connector It is available to operate the air conditioning unit and to monitor the operation status with the external control unit (remote display) by sending the input/output signal through CNT connector on the indoor control PCB. 0.75mm Note (1) 0.3mm ×2m...
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'14 • SRF-T-163 Connection of wired remote control Regarding the connection of wired remote control, refer to the instruction manual of wired remote control. ①Switch ON the DIP switch SW2-2 (Factory setting : ON) on the interface PCB. DIP suitch Caution:Wireless remote control attached to the indoor unit can be used in parallel, after connecting the wired remote control.
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RESIDENTIAL AIR-CONDITIONING TECHNICAL MANUAL & PARTS LIST Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.
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