Mitsubishi MSZ-SF15VA- User Manual

5 MSZ-SF15VA 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT A VE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR BAND CENTER FREQUENCIES, Hz COOLING FUNCTION SPL(dB(A)) LINE Super High FAN SPEED HEATING 42 42 NC-10 MSZ-SF20VA Test conditions C...

6 Unit: mm MSZ-SF15VA MSZ-SF20VA OUTLINES AND DIMENSIONS 5 11 20 Oblong hole Installation plate 11 20 Oblong hole Indoor unit Wall hole 65 Ø 61 295 155 78 45 335 300 145 145 81 208 166 42 167 187 209 21.5 41 760 740 10 5 168 45 56 505 179 56 202 250 8 110 41 56 Installation plate Piping Drain hose A...

8 Indoor heat exchanger Flared connection Room temperaturethermistorRT11 Flared connection Refrigerant pipe ø9.52 (with heat insulator) Refrigerant pipe ø6.35(with heat insulator) Indoor coil thermistorRT12 (main) Indoor coil thermistorRT13 (sub) Refrigerant flow in coolingRefrigerant flow in heatin...

9 8-1. TIMER SHORT MODE For service, the following set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.(Refer to 10-7.)Set time: 3 minutes → 3 seconds (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by shor...

10 8-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the s...

11 WIRELESS REMOTE CONTROLLER NOTE : Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the remote controller with beeps. MICROPROCESSOR CONTROL 9 MSZ-SF15VA MSZ-SF20VA Signal transmitting section Operation display section Temperat...

12 9-2. DRY ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select DRY mode with OPERATION SELECT button.(3) The set temperature is determined from the initial room temperature. 1. Coil frost prevention Coil frost preve...

14 9-6. TIMER OPERATION 1. How to set the time (1) Check that the current time is set correctly. NOTE: Timer operation will not work without setting the current time. Initially “0:00” blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK SET button. How to ...

15 9-7. WEEKLY TIMER OPERATION • A maximum of 4 ON or OFF timers can be set for individual days of the week.• A maximum of 28 ON or OFF timers can be set for a week. * Make sure that the current time and day are set correctly. (1) Press button to enter the weekly timer setting mode. (2) Press and bu...

16 (5) Press button to turn the weekly timer ON. ( lights.) •When the weekly timer is ON, the day of the week whose timer setting is complete, will light. Press button again to turn the weekly timer OFF. ( goes out.) NOTE: The saved settings will not be cleared when the weekly timer is turned OFF. 2...

17 RESET button Insert the negative pole of the batteries first. Check if the polarity of the batteries is correct. NOTE: 1. If RESET button is not pressed, the remote controller may not operate correctly. 2. This remote controller has a circuit to automatically reset the microcomputer when batterie...

19 2. Indoor unit failure mode table Left lamp of OP- ERATION INDICA- TOR lamp Abnormal point (Failure mode) Condition Remedy Not lighted Normal — — 1-time fl ash every 0.5-second Room temperature thermistor The room temperature thermistor short or open circuit is detected every 8 seconds dur-ing op...

23 A Check of indoor fan motor 10-6. TROUBLESHOOTING FLOW The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Is there any foreign matter that interferes the rotation of the line fl ow fan? Yes No Remove the foreign matter and adjust the line fl o...

25 C Check of indoor P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply. Does the unit operate with the remote controller? Does OPERATION INDICATO...

26 D How to check miswiring and serial signal error Turn OFF inverter-controlled lighting equipment.Turn OFF the power supply and then turn ON again.Press EMERGENCY OPERATION switch. • • • A Is serial signal error indicated 6 minutes later? B Yes Reinstall either the unit or the light away from each...

27 E Electromagnetic noise enters into TV sets or radios Yes Is the unit earthed? No Earth the unit. Yes Is the distance between the antennas and the indoor unit within 3 m, or is the distance between the antennas and the outdoor unit within 3 m? No Extend the distance between the antennas and the i...

29 MSZ-SF15VA MSZ-SF20VA NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the panel (1) Remove the horizontal vanes.(2) Remove the screw caps of the panel. Remove the screws. (3) Unhook the lower part ( ) of the panel.(4) Hold the lower part of both ends of the ...

30 OPERATING PROCEDURE PHOTOS 2. Removing the indoor electronic control P.C. board, receiver P.C. board, display P.C. board, and SW P.C. board (1) Remove the panel (refer to 1.) and the corner box.(2) Remove the screw of the V.A. clamp. Remove the V.A. clamp and the indoor/outdoor connecting wire. (...

31 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box (1) Remove the panel (refer to 1.) and the corner box.(2) Remove the indoor/outdoor connecting wire, the SW holder, the display holder, the electrical cover and the earth wire connected to the indoor electronic control P.C. board from the ...

OPERATING PROCEDURE PHOTOS 7. Removing the indoor fan motor and the line flow fan (1) Remove the panel (refer to 1.) and the corner box.(2) Remove the SW holder, the display P.C. board holder, the electrical box (refer to 3.) and the nozzle assem-bly (Refer to 4.). (4) Remove the screws fixing the m...