User manual MITSUBISHI MFZ-KA09NA

[. . . ] NOISE CRITERIA CURVES ·······························6 MFZ-KA35VA - E1 4. OUTLINES AND DIMENSIONS ·························7 MFZ-KA50VA - E1 5. WIRING DIAGRAM ············································8 6. REFRIGERANT SYSTEM DIAGRAM ················8 7. [. . . ] Refer to service manual OC322, OB377 or OC316. Indoor unit and outdoor unit do not operate. The compressor stops 3 times consecutively for over current protection or start-up failure protection within 1 minute after start-up. · Refer to "Check of inverter/ compressor". Refer to service manual OC322, OB377 or OC316. · Refer to "Check of outdoor thermistor". Refer to service manual OC322, OB377 or OC316. 6 When the outdoor thermistors short or open circuit during the compressor operation. 8 2. 5-second OFF Left lamp flashes. 14-time flash 9 Other abnormality An abnormality other than above mentioned is detected. 10 Indoor damper 2. 5-second OFF Left lamp flashes. 15-time flash When the damper is not located at the designated position. · Refer to 9-6. E "Check of damper". 2. 5-second OFF NOTE : When the indoor unit has started operation and the above failures are detected (the first detection after the power ON), the indoor electronic control P. C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing. 25 OPERATION INDICATOR Lighted Blinking Not lighted · Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates abnormality. · OPERATION INDICATOR lamp (left-hand side lamp) is lighted. No. Abnormal point MXZ type Operation mode setting Operation indicator lamp Right lamp flash Symptom Outdoor unit operates but indoor unit does not operate. Check point When the operation mode of the each indoor unit is differently set to COOL(includes DRY) and HEAT at the same time, the operation mode of the indoor unit that has operated at first has the priority. Countermeasure · Unify the operation mode. No (Changed) Replace the indoor electronic control P. C. board. Measure the voltage between CN211 6(+) and 3(-) while the fan motor is rotating. Is 0V DC or 15V DC held unchanged?Yes (Unchanged) Replace the indoor fan motor. 27 When the left lamp of OPERATION INDICATOR lamp flashes 3 times and the right lamp of OPERATION INDICATOR lamp flashes ON and OFF every 0. 5-second. Check of indoor fan motor (lower) The indoor fan motor error has occurred, and the indoor fan doesn't operate. Turn OFF the power supply. Pay careful attention to the high voltage on the fan motor connector CN212. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch. Measure the supply voltage as follows within 12 seconds after EMERGENCY OPERATION switch is pressed. If more than 12 seconds passes by, turn OFF the power supply and turn ON it again, then measure the voltage. w 1) Measure the voltage between CN212 1(+) and 3(-). 2) Measure the voltage between CN212 5(+) and 3(-). Is there anything that interferes the rotation of the line flow fan? No Yes Remove the object and adjust the line flow fan. wIf more than 12 seconds passes after EMERGENCY OPERATION switch is pressed, the voltage mentioned in above 2) goes 0V DC although the indoor electronic control P. C. board is normal. Is there 311V DC between CN211 1 (+) and 3 (-), and does the voltage between CN212 5(+) and 3(-) rise to the range between 3 and 6VDC within 12 seconds after EMERGENCY OPERATION switch is pressed? [. . . ] (8) Remove the screws of the damper motor, and then the damper motor from the damper motor support. (9) Disconnect the connector from the damper motor. (10) Remove the damper limit switches (LS1, LS2). PHOTOS Photo 9 Screw of the nozzle Screw of the nozzle Drain hose Photo 10 Lead wires of the damper motor and the damper lock motor Photo 11 7. Removing the indoor fan motor (lower) (1) Remove the panel. [. . . ]