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Table Of Contents - Mitsubishi Electric CAHV-P500YA-HPB Service Handbook

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Instruction manual (20 pages)

Table Of Contents

Table of Contents

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Table of Contents

Safety Precautions2

Table Of Contents6

Read Before Servicing10

I Read Before Servicing10

Necessary Tools And Materials11

Use Of Oxidized Solder For Brazing12

Use Of Non-Oxidized Solder For Brazing12

Air Tightness Test13

R22 Leakage Detector13

Required Precision Of Vacuum Gauge14

Evacuation Time14

Procedures For Stopping Vacuum Pump14

Vacuum Drying (Evacuation)14

Refrigerant Charging15

Remedies To Be Taken In Case Of A Refrigerant Leak15

Cylinder With A Siphon15

Cylinder Without A Siphon15

Characteristics Of The Conventional And The New Refrigerants16

Chemical Property16

Pressure Characteristics16

Notes On Refrigerating Machine Oil17

Refrigerating Machine Oil In The Hfc Refrigerant System17

Effects Of Contaminants17

System Configuration20

Schematic Diagrams Of Individual And Multiple Systems20

Multiple System (2-16 Units)20

Types And Maximum Allowable Length Of Cables21

Control Wiring21

Tb3: Terminal Block For Transmission Line21

Main Power Supply Wiring And Switch Capacity22

Schematic Drawing Of Wiring (Example)22

Control Cable Specifications23

Schematic Diagram Of A Unit And Terminal Block Arrangement23

Installing The Conduit Tube23

Sample Installation24

Individual System24

Switch Types And The Factory Settings25

Switch Names And Functions25

Different Types Of Switches On The Pcb25

Configuring The Settings26

To Change The Settings26

System Configuration Procedures: Individual System27

Switch Settings On The Main Circuit27

System Configuration Procedures : Multiple System28

System Configuration Diagram28

Setting The Switches On The Main Unit28

Re-Initializing The System30

Resetting The System (Main And Sub Circuits)30

Water Pipe Installation31

Schematic Piping Diagram And Piping System Components31

Notes On Pipe Corrosion32

Water Treatment And Water Quality Control32

Water Quality Standard32

Suspended Solids In The Water33

Removing Foreign Substances From The Water System33

Connecting Pipes Made From Different Materials33

Installing The Strainer And Flow Switch34

Installing The Strainer34

Installing A Flow Switch34

Water Pipe Hole Size And Location34

Minimum And Maximum Water Flow Rates35

Maintaining The Appropriate Amount Of Water In The Water Circuit.35

Calculating The Amount Of Water In The Circuit35

Amount Of Water In The Piping35

Unit Components36

Unit Components And Refrigerant Circuit38

Refrigerant Circuit39

Control Box Of The Unit40

Main Circuit Control Box40

Sub Circuit Control Box40

Unit Circuit Board41

Control Board (Main Board)41

Remote Controller46

Using The Remote Controller48

Starting And Stopping Operation And Changing The Operation Mode48

To Stop Operation48

To Select The Mode48

Setting The Water Temperature49

How To Set The Day Of The Week And Time49

How To Change The Temperature Setting49

Using The Timer49

How To Set The Weekly Timer50

How To View The Weekly Timer Settings50

To Turn Off The Weekly Timer50

Using The Simple Timer50

How To Set The Simple Timer51

To Turn Off The Simple Timer51

To Turn On The Simple Timer51

Viewing The Current Simple Timer Settings51

Using The Auto-Off Timer52

Checking The Current Auto-Off Timer Setting52

To Turn Off The Auto-Off Timer52

To Turn On The Auto-Off Timer52

Function Settings53

Function Setting Flowchart53

Settings Details54

Operation Mode Skip Setting54

Temperature Range Limit Setting54

Contact Number Setting54

Electrical Wiring Diagram56

Refrigerant Circuit Diagram64

Table Of Symbols And Circuit Components64

Principal Parts And Functions65

Functions And Factory Settings Of The Dipswitches70

Factory Switch Settings70

Slide Switch (Sws1) Settings71

Setting Procedures74

Settings Table74

Scheduled Operation75

When The Operation Start/End Times Do Not Overlap76

When Operation Period 1 And 2 Overlap76

When Operation Periods 1 And 3 Overlap76

Selecting The Preset Temperature For Different Operation Periods77

Peak-Demand Control Operation79

Setting The Total Number Of Units For A Multiple System80

Selecting The Item That Normally Appears On The Led81

Remote Water Temperature Setting Input Signal Type82

Setting The Water Temperature Using Analog Signal Input83

Setting The Booster Heater Operation Conditions84

Operating Characteristics And Control Capabilities86

Initial Control87

Compressor Frequency87

Defrost Operation88

Defrost Start88

Defrost-Start Conditions88

Outdoor Unit Fan89

Injection Lev89

Lev In The Main Circuit90

Operation During Power Failure90

Anti-Short-Cycling Protection91

Multiple System Control94

Water Piping System Configuration94

Automatic Operation Of Pump For Freeze-Up Protection95

Water-Temperature Control96

Normal Thermo-On/Off Operations97

Thermo-On/Off Temperature Conditions97

Thermo-On/Off Conditions (Time)98

External Water Temperature Sensor Tw-Th16100

Wiring The External Water Temperature Sensor100

Terminal Block For Connection To The Sensor100

Detailed View Of The Area Labeled "A" In The Figure Above100

Test Run Mode102

Items To Be Checked Before A Test Run104

Check The Pressure104

Check That The Correct Voltage Is Applied104

Check For Proper Circulating Water Flow Rate105

Notes On Temperature Adjustment Function105

Connecting The Pump-Interlock Wire105

Notes On Connecting The Pump-Interlock Wire105

Test Run Method106

Operating The Unit107

Initial Operation107

Daily Operation107

To Start An Operation107

Symptoms That Do Not Signify Problems108

Standard Operating Characteristics(Reference Data)108

Troubleshooting110

Maintenance Items112

Checking The Error History112

Checking The Sensor Status114

Sensors And Item Code List115

Operation Status Before Error116

Time Of Data Storage Before Error117

Maintenance Setting118

Troubleshooting Principal Parts129

High-Pressure Sensor129

Pressure Sensor Configuration129

Low-Pressure Sensor130

Low-Pressure Sensor Configuration130

Temperature Sensor131

Low-Temperature-Range Thermistor131

High-Temperature-Range Thermistor131

Lev132

Control Board And Lev132

Pulse Signal Output And Valve Operation132

Lev Valve Closing And Opening Operatio132

General Descriptions Of Injection Lev Operation133

Judgment Methods And Possible Failure Mode134

Injection Lev Coil Removal Procedure135

Removing The Coils135

Installing The Coils135

Inverter-Related Problems136

Judgment Value (Reference)142

Inv Board External Diagram142

Control Circuit143

Troubleshooting Transmission Power Circuit Of Outdoor Unit143

Fan144

Refrigerant Leak145

Parts Replacement Procedures146

Compressor Replacement Instructions147

Attachment Instructions For Inj Pipe Fixing Plate148

Check Valve Replacement Instructions149

Lev Replacement Instructions150

Thermistor Replacement Instructions151

Solenoid Valve Replacement Instructions152

4-Way Valve Replacement Instructions153

Replacing The Plate Exchanger And Connecting Water Piping154

Water Piping Configuration In The Unit And How To Connect The Piping154

R407C Saturation Temperature Table158

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Troubleshooting