Mitsubishi Electronics MSZ-FD09NA service manual Test Point Diagram and Voltage, SW P.C. Board

Page 34

9-7. TEST POINT DIAGRAM AND VOLTAGE

MSZ-FD09NA MSZ-FD12NA

Indoor electronic control P.C. board

5 VDC

12 VDC

Cement resistor

(R111)

 

Indoor fan motor

 

(CN211)

 

294/325 VDC

 

(-) Fiducial terminal of

 

cathode side on measur-

 

ing high-voltage DC

 

15 VDC

 

(+)3 - 6 VDC

 

(+)0 or 15 VDC

Power supply input

{

208/230 VAC

SW P.C. Board

Room temperature

thermistor RT11

Emergency

(CN111)

operation

Varistor (NR11)

switch (SW1)

CN201

 

(Used for check of con-

 

ducting of thermal fuse)

 

Indoor coil thermistor

 

RT12, RT13 (CN112)

(LD101)

i-see Sensor

(CN110)

- : Connect to the monitor P.C.board

 

- : Connect to the power monitor receiver

Release of Auto restart

P.C.board

function

 

Solder the Jumper wire

 

JR07

 

(Refer to 7-3.)

 

Horizontal vane (CN1U1)

 

Vertical vanes (CN151)

 

Timer short mode

 

}point JPG, JPS

Fuse

(Refer to 7-1.)

 

(F11)

 

Room temperature thermistor (RT11)

Indoor coil thermistor (RT12, RT13)

Resistance (kΩ)

3250 68 86 104 122 140 Temperature (°F)

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Contents MSZ-FD09NA MSZ-FD12NA Specification has been corrected New model Accessories Part Names and FunctionsRemote controller Power supply Phase, Hz 208/230Weight External finish Indoor modelOperating Range Outlet AIR Speed and Coverage RangeAir Outlines and DimensionsUnit inch Air outWiring Diagram Unitinch Refrigerant System DiagramRefrigerant flow in cooling Refrigerant flow in heating How to modify the remote controller P.C. board Service FunctionsTimer Short Mode P.C. Board Modification for Individual OperationAuto Restart Function How to release Auto Restart FunctionOperation Lamp lights during operation Microprocessor ControlRefer to Lamp blinks in abnormal conditionDRY Operation Cool OperationHeat Operation Auto Vane Operation Auto Change Over ··· Auto Mode OperationMode selection Outdoor Unit MXZ seriesDirection Feet, set the horizontalVertical vane See Sensor Area SettingSee Control Operation Enlarged view of i-see SensorNighttime Cold area DaytimeLighted Not lighted Operation and operating range Center ·····Program Timer Changing temperature indication F/C Minute Time Delay OperationEMERGENCY/TEST Operation Lead wiring Housing point Troubleshooting procedure TroubleshootingBefore troubleshooting, check the following How to replace batteriesFailure Mode Recall Function OFFIndoor unit failure mode table PowerInstruction of Troubleshooting Troubleshooting Check Table Lighted BlinkingArea R Power Trouble Criterion of Main Parts MSZ-FD09NAMSZ-FD12NA Troubleshooting Flow Check of indoor fan motorPage Replace the horizontal vane motor, How to check miswiring and serial signal error Electromagnetic noise enters into TV sets or radios Indoor electronic control P.C. board Test Point Diagram and VoltageSW P.C. Board Power monitor receiver P.C. board Monitor P.C. board Disassembly Instructions Removing the panel PhotoOperating Procedure Photos Open the rear cover of the power monitor receiver P.CPhoto Removing the vertical vane motor unit Removing the nozzle assemblyRemoving the electrical box Photo Correct positionRemoving the horizontal vane motor Photo Removing the indoor fan motor and the line flow fan PhotoMade in Japan
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