Hitachi FSG Series Service Manual page 7

2.9. TOTAL HEAT EXCHANGER ............................................................................................................... 2-45
2.9.1. REMOVING AIR FILTER ............................................................................................................. 2-45
2.9.2. REMOVING TOTAL HEAT EXCHANGING ROTOR.................................................................... 2-46
2.9.3. REMOVING AIR SUPPLY FAN ASSEMBLY AND EXHAUST FAN ASSEMBLY......................... 2-46
2.10. CLEANING INDOOR UNIT HEAT EXCHANGER................................................................................ 2-47
2.10.1. REQUIRED TOOLS FOR CLEANING (FOR ALL INDOOR UNITS) ............................................ 2-47
2.10.2. CLEANING 4-WAY CASSETTE TYPE INDOOR UNIT................................................................ 2-49
2.10.3. CLEANING 2-WAY CASSETTE TYPE INDOOR UNIT................................................................ 2-52
2.10.4. CLEANING WALL TYPE INDOOR UNIT ..................................................................................... 2-54
2.10.5. CLEANING FLOOR TYPE AND FLOOR CONCEALED TYPE INDOOR UNIT ........................... 2-54
2.10.6. CLEANING CEILING TYPE INDOOR UNIT................................................................................. 2-56
2.11. REMOVING REMOTE CONTROLLER................................................................................................ 2-59
2.11.1. REMOVING REMOTE CONTROL SWITCH ................................................................................ 2-59
2.12. COLLECTING REFRIGERANT FOR REPLACING INDOOR UNIT .................................................... 2-60
3. MAIN PARTS
3.1. INVERTER ............................................................................................................................................. 3-1
3.1.1. CALCULATION OF OPERATING FREQUENCY........................................................................... 3-1
3.1.2. SPECIFICATIONS OF INVERTER ................................................................................................ 3-4
3.1.3. ARRANGEMENT OF INVERTER POWER UNIT........................................................................... 3-4
3.1.4. PROTECTIVE FUNCTION............................................................................................................. 3-7
3.2. THERMISTOR........................................................................................................................................ 3-8
3.2.1. RESISTANCE VALUE OF THERMISTOR ..................................................................................... 3-9
3.3. ELECTRONIC EXPANSION VALVE ................................................................................................... 3-11
3.3.1. ELECTRONIC EXPANSION VALVE FOR OUTDOOR UNITS .................................................... 3-11
3.3.2. ELECTRONIC EXPANSION VALVE FOR INDOOR UNITS ........................................................ 3-12
3.4. PRESSURE SENSOR.......................................................................................................................... 3-13
3.5. NOISE FILTER..................................................................................................................................... 3-14
3.6. CAPACITOR ........................................................................................................................................ 3-16
3.7. REACTOR (DCL) ................................................................................................................................. 3-16
3.8. CIRCUIT DIAGRAM FOR PRINTED CIRCUIT BOARD OF OUTDOOR UNIT.................................... 3-19
3.9. CIRCUIT DIAGRAM FOR PRINTED CIRCUIT BOARD OF INDOOR UNIT ....................................... 3-23
3.10. CIRCUIT DIAGRAM FOR PRINTED CIRCUIT BOARD OF REMOTE CONTROL SWITCH .............. 3-25
3.11. CIRCUIT DIAGRAM FOR PRINTED CIRCUIT BOARD OF RECEIVER............................................. 3-27
4. OPTIONAL FUNCTION .................................................................................... 4-1
4.1. INDOOR UNIT........................................................................................................................................ 4-1
4.1.1. REMOTE CONTROL ON/OFF FUNCTION ................................................................................... 4-1
4.1.2. POWER SUPPLY ON/OFF 1 (AUTOMATIC OPERATION WHEN POWER SUPPLY ON)........... 4-3
4.1.3. POWER SUPPLY ON/OFF 2 (RESTARTING FUNCTION AFTER POWER FAILURE) ................ 4-3
4.1.4. CONTROL BY FIELD-SUPPLIED ROOM THERMOSTAT ............................................................ 4-3
4.1.5. OPERATION CONTROL BY REMOTE TEMPERATURE SENSOR.............................................. 4-4
4.1.6. COOLING OR HEATING OPERATION MODE SETTING CHANGE BY EXTERNAL
INPUT (LEVEL SIGNAL INPUT) .................................................................................................... 4-4
4.1.7. PICKING UP OPERATION SIGNAL .............................................................................................. 4-5
CONTENTS
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