Hitachi FSG Series Service Manual page 8

CONTENTS
4
4.2. OUTDOOR UNIT.................................................................................................................................... 4-6
4.2.1. DEMAND ....................................................................................................................................... 4-7
4.2.2. FORCED STOPPAGE ................................................................................................................... 4-7
4.2.3. FIXING OPERATION MODE ......................................................................................................... 4-8
4.2.4. SNOW SENSOR............................................................................................................................ 4-8
4.2.5. DEFROSTING CONDITION CHANGEOVER ................................................................................ 4-9
4.2.6. INDOOR FAN CONTROL DURING THERMO-OFF AT HEATING................................................ 4-9
4.2.7. ALL SEASON HEATING OPERATION.......................................................................................... 4-9
4.2.8. ALL SEASON COOLING OPERATION ........................................................................................4-10
4.2.9. NIGHT SHIFT (LOW SOUND) OPERATION ................................................................................4-10
4.2.10. PICKING UP SIGNALS FROM OUTDOOR UNIT PRINTED CIRCUIT BOARD...........................4-11
4.3. REMOTE CONTROL SWITCH (PC-2H2) .............................................................................................4-12
4.3.1. NAME OF PARTS.........................................................................................................................4-12
4.3.2. SIMULTANEOUS OPERATION....................................................................................................4-13
4.3.3. OPERATION SYSTEM WITH TWO REMOTE CONTROL SWITCHES .......................................4-14
4.3.4. OPTIONAL FUNCTION SETTING ................................................................................................4-14
4.3.5. OPTIONAL FUNCTIONS OF REMOTE CONTROL SWITCH ......................................................4-16
4.3.6. INDICATION OF ADDRESS (ADDS) AND REFRIGERANT CYCLE NUMBER (RN)...................4-18
4.4. OPTIONAL WIRELESS REMOTE CONTROL SWITCH, PC-LH3 .......................................................4-19
4.4.1. NAME OF PARTS.........................................................................................................................4-19
4.4.2. IDENTIFYING OF INDOOR UNITS INSTALLED SIDE BY SIDE .................................................4-20
4.4.3. SIMULTANEOUS OPERATION....................................................................................................4-20
4.4.4. EMERGENCY OPERATION.........................................................................................................4-22
4.4.5. OPTIONAL FUNCTION SETTING ................................................................................................4-22
4.4.6. OPTIONAL FUNCTIONS OF WIRELESS REMOTE CONTROL SWITCH...................................4-23
4.5. 7-DAY TIMER (PSC-3T) .......................................................................................................................4-24
4.5.1. NAME OF PARTS.........................................................................................................................4-24
4.5.2. OPERATION PROCEDURE FOR RUNNING PATTERN .............................................................4-25
4.5.3. OPERATION PROCEDURE FOR OPERATION PATTERN.........................................................4-25
4.6. OPTIONAL CENTRAL STATION (PSC-3S1).......................................................................................4-26
4.6.1. NAME OF PARTS.........................................................................................................................4-26
4.6.2. SYSTEM .......................................................................................................................................4-27
4.6.3. OPERATION PROCEDURE FOR CENTRAL STATION .............................................................4-29
5. FIELD WORK INSTRUCTION .......................................................................... 5-1
5.1. BURNT-OUT COMPRESSOR DUE TO INSUFFICIENT REFRIGERANT CHARGE............................ 5-1
5.2. INSUFFICIENT COOLING PERFORMANCE WHEN A LONG PIPING IS APPLIED ........................... 5-1
5.3. ABNORMALLY HIGH OPERATING SOUND (IN-THE-CEILING TYPE INDOOR UNIT)...................... 5-2
5.4. ALARM CODE "31"............................................................................................................................... 5-2
5.5. NOT COOLING WELL DUE TO INSUFFICIENT INSTALLATION SPACE FOR
OUTDOOR UNIT.................................................................................................................................... 5-3
5.6. SELECT GUIDE OF DRAIN PIPE FOR INDOOR UNIT ........................................................................ 5-4
5.7. CAUTION ON REFRIGERANT LEAKAGE ........................................................................................... 5-4
5.8. MAINTENANCE WORK ........................................................................................................................ 5-5
5.9. SERVICE & MAINTENANCE RECORD ................................................................................................ 5-6
5.10. SERVICE & MAINTENANCE RECORD BY 7-SEGMENT DISPLAY.................................................... 5-7
5.11. SERVICE & MAINTENANCE RECORD BY REMOTE CONTROL SWITCH ........................................ 5-8