LG RCAW070PBAA User Manual Page 63
- Page / 93
- Table of contents
- BOOKMARKS
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Operation & Maintenance Manual 63
Service
■ Voltage Monitoring Relay (5E)
The voltage monitoring relay is used for the verification of proper power supply. The voltage monitoring relay is shown in
the below. Existing 3-phase voltage will be shown ordinally every 3 seconds as shown in the below.
The voltage monitoring relay monitors 5 abnormal conditions of the power supply. The abnormal conditions include over
voltage, under voltage, phase reverse, phase loss, and voltage unbalance. Among the abnormal conditions, the phase
reverse and the voltage unbalance are selectively protective. The others are mandatory. When any abnormal condition
is encountered, the type of abnormal condition and abnormal value detected are displayed instead of normal display.
Some examples of the abnormal conditions are shown in the below.
Along with the selectivity of protection, reset method after any abnormal condition invocation can be configured through
4-position DIP switches. The functions of the DIP switches are shown in the below. According to factory setting, only the
switch positioned at ʻ5S/1Sʼ is off, and the others are on. Please don't change factory setting for proper protection.
V
R
S
T
S
V
R
S
T
S
V
R
S
T
S
V
R
S
T
S
V
R
S
T
S
V
R
S
T
S
UNDER VOLTAGE
UNBALANCE VOLTAGE
PHASE LOSS NO INPUT
OVER VOLTAGE REVERSE PHASE
V
R
S
T
S
V
R
S
T
S
V
R
S
T
S
Fig. 38
Fig. 39
- AIR-COOLED SCREW 1
- TABLE OF CONTENTS 2
- SAFETY CONSIDERATIONS 3
- Main Menu 12
- User Setting 13
- 14 Chiller Air-cooled Screw 14
- I/O Display 15
- 16 Chiller Air-cooled Screw 16
- Alarm Display 17
- System Setting 18
- Parameter Setting 19
- Delay Setting 20
- CONTROLS 21
- Controls 22
- 22 Chiller Air-cooled Screw 22
- DO - 2: CN3 DI - 2: CN5 23
- RTDI: CN6 23
- 24 Chiller Air-cooled Screw 24
- 26 Chiller Air-cooled Screw 26
- 28 Chiller Air-cooled Screw 28
- ■ Machine On/off Control 30
- START-UP 31
- ■ Start-Up Procedure 32
- ■ Operation Limits 34
- Flow Rate 35
- ■ Pressure Drop 36
- Start-up 37
- 38 Chiller Air-cooled Screw 38
- OPERATION 40
- Operation 41
- 42 Chiller Air-cooled Screw 42
- Stop logic 42
- 44 Chiller Air-cooled Screw 44
- ■ Sensors 45
- ■ Cycle Components 46
- Table 14 47
- Table 15 49
- Table 16 50
- Condenser 51
- ■ Condenser fan 52
- ■ Flow Switch 53
- ■ Dual Pressure Switch 54
- ■ Anti-freezing Switch 55
- ■ Leakage test 56
- ■ Charging the refrigerant 56
- ■ Charging the oil 56
- ■ Oil Filter 57
- ■ Oil Flow Switch 57
- ■ Oil Heater 58
- ■ Solenoid Valve 58
- Control Panel 59
- Power Panel 59
- Wye Starting Delta Running 61
- ■ Condenser Fan OCR 62
- Table 23 64
- Table 22 64
- ■ Assist Relay 65
- ■ Compressor Contactor 65
- ■ Fan Contactor 66
- Control fuse 68
- Control Relay 68
- Switched Mode 68
- Power Supply 68
- ■ Temp. Sensor in Control Box 69
- ■ Ventilation Fan 69
- ■ Maintenance 70
- TROUBLE SHOOTING 71
- 72 Chiller Air-cooled Screw 72
- Trouble Shooting 72
- 74 Chiller Air-cooled Screw 74
- 76 Chiller Air-cooled Screw 76
- 78 Chiller Air-cooled Screw 78
- Appendix 79
- 80 Chiller Air-cooled Screw 80
- RCAW200*BAA, RCAW240*BAA 81
- DESCRIPTION 82
- 84 Chiller Air-cooled Screw 84
- CHILLED WATER IN TEMP 84
- CHILLED WATER OUT TEMP 84
- RCAW1309BAA, RCAW1509BAA 84
- CHILLED WATER IN TEMP1 86
- CHILLED WATER OUT TEMP1 86
- CHILLED WATER IN TEMP2 86
- CHILLED WATER OUT TEMP2 86
- RCAW2009BAA, RCAW2409BAA 86
- 88 Chiller Air-cooled Screw 88
- RCAW3609BAA 88
- ■ Cycle Diagram 89
- 1. Project information 90
- 2. Model information 90
- 4. Chilled Water System Check 91
- 5. START-UP & OPERATION 92
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