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CONTENTS
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Section 1: CONTROL FUNCTIONS .......................................... 1-1
1. Introduction .............................................................1-2
2. Selecting Outdoor Unit for Operation .......................................... 1-3
3. Compressor Control .......................................................1-5
4. Output of PCB ..........................................................1-13
5. Outdoor Fan Control .....................................................1-19
6. Outdoor Unit CCU (command controller unit) Control ............................1-23
7. Tube Refrigerant Recovery Control ..........................................1-27
8. Oil Control .............................................................1-29
9. Defrost Control ..........................................................1-32
10. Discharge Tube Accumulated Refrigerant Recovery Control ....................... 1-38
11. Upper Current Limitation Mode (Demand control) ...............................1-39
12. Backup Operation .......................................................1-41
13. Other Functions .........................................................1-45
14. Detailed Settings in EEPROM of Outdoor Unit .................................1-47
15. Outdoor Unit Control PCB .................................................1-49
Section 2: OUTDOOR UNIT REPAIR PROCEDURES ........................... 2-1
1. Removing Panels ......................................................... 2-2
2. Discharging Compressor Oil ................................................ 2-3
3. Backup Operation ........................................................ 2-5
4. Recovering Refrigerant .................................................... 2-7
5. Checking for Leakage After Repair .......................................... 2-12
6. Evacuating System ...................................................... 2-13
7. Charging Compressor Oil ................................................. 2-14
8. Pumping Out Refrigerant from Outdoot Unit ................................... 2-19
9. Compressor ........................................................... 2-23
10. Replacing Peripheral Parts of Fusible Plug .................................... 2-32
11. High and Low Pressure Sensors ............................................ 2-33
Section 3: OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER ............. 3-1
In the case of CZ-RTC2
1. Overview ...............................................................3-2
2. Functions ...............................................................3-3
3. Ordinary Display Controls and Functions ......................................3-4
4. Monitoring Operations .....................................................3-9
5. Outdoor Unit Alarm History Monitor ..........................................3-11
6. Mode Settings ..........................................................3-12
In the case of CZ-RTC4
7. Overview ..............................................................3-14
8. Functions ..............................................................3-15
9. Ordinary Display Controls and Functions .....................................3-16
10. Monitoring Operations ....................................................3-21
11. Outdoor Unit Alarm History Monitor ..........................................3-23
12. Mode Settings ..........................................................3-24
SM830246-00_北米向け3WAY_VRF.indb 6 15/12/16 11:40:55
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