Table Of Contents - Toshiba HWS-802XWHM3-E Service Manual

Table of Contents

Service Manual1
Table Of Contents2
Safety Precautions4
Safety During Installation And Service7
New Refrigerant (R410A)7
Installing Refrigerant Pipe8
Steel Pipe And Joint8
Wall Thickness Of Copper Pipe8
The Minimum Wall Thickness Of Socket Joints8
Processing Of Piping Materials9
Flare And Precautions9
Relationship Between Flare Nut And Flare Surface9
Flare Processing Related Dimension For The Unit9
Flare Connecting Procedure And Precautions10
2-3.Tools11
2-3-1.Necessary Tools11
Recharging Of Refrigerant12
Configuration Of Refrigerant Charging12
Brazing Of Pipes14
Flux14
Materials Of Brazing14
Brazing Method To Prevent Oxidation14
2-5-3.Brazing14
Specifications16
Outside Drawing18
4-1.Hydro Unit18
4-2.Outdoor Unit19
Hot Water Cylinder Drawing21
4-3.Hot Water Cylinder21
Wiring Diagram22
5-1.Hydro Unit22
5-2.Outdoor Unit23
5-3.Hot Water Cylinder Unit24
Key Electric Component Rating25
6-1.Hydro Unit25
6-2.Outdoor Unit27
6-3.Hot Water Cylinder Unit29
Water Heat Exchange Control Board30
Outdoor Control Board31
Refrigeration Cycle / Water System Diagram33
7-1.Water System Diagram33
Installation Example Of Water Circuit34
Refrigeration Cycle System Diagram35
Operational Description36
Operation Control37
Hot Water Supply Operation38
Heating Operation38
Cooling Operation39
Simultaneous Operations Of "Hot Water Supply" And "Cooling"43
Boiler-Assisted Heating Operation43
Hot Water Boost Operation44
Anti Bacteria Operation45
Night Set Back Operation46
Frost Protection Operation46
Auto Operation47
Nighttime Low-Noise Operation48
Hydro Unit Control49
Capacity Control49
High Temperature Release Control50
Low Temperature Release Control50
Heater Control51
Control At The Time Of Heating Heater Operation52
Heater Control At The Time Of Defrosting52
Forcible Heater Energization52
Circulation Pump Control53
Flow Switch Operation53
Mixing Valve Control (2-Temperature Heating Control)54
Automatic Restart Control55
Piping Freeze Prevention Control55
High Return Water Protect Control56
Room Temperature Thermostat Control57
Heating Thermostat Operation57
Cooling Thermostat Operation57
Output Signal Control57
Outdoor Unit Control58
Pmv (Pulse Motor Valve) Control58
Discharge Temperature Release Control58
Current Release Control59
Current Releases Shift Control59
Outdoor Fan Control60
Hot Water Supply And Heating Fan Control61
Defrosting Control62
Winding Heating Control63
Short Circuit Operation Prevention Control63
Over Current Protection Control63
Method Of Defect Diagnosis65
9-1.Matters To Be Confirmed First65
Check The Power Supply Voltage66
About The Installation Of The Temperature Sensor66
Non-Defective Operation (Program Operation)66
9-1-2.Check For Any Miswiring Of The Connection Cables Between The Hydro Unit And The Outdoor Unit66
Outline Of The Determination Diagram67
Procedure Of Defect Diagnosis67
How To Determine From The Check Code On The Remote Control67
How To Cancel A Check Code On The Remote Controller67
How To Diagnose By Error Code68
Defect Mode Detected By The Outdoor Unit71
Defect Mode Detected By The Remote Control74
Diagnosis Flow Chart For Each Error Code75
Hydro Unit Failure Detection75
Error Temperature Rise And Error Short Circuit76
Error Freeze Prevention Control78
Error Piping Freeze Prevention Control79
Error Pressure Switch Operation (Hot Water Supply/Heating Operation)80
Error Lo Pressure Sensor Lowering Operation Failure81
Error Overheat Prevention Thermostat Failure82
Error Release Protection Operation83
Error Heating Or Hot Water Supply Heater Failure84
Error85
Error Tc Sensor Failure86
Error Td Sensor Failure86
Error Te Sensor Failure86
Error Tl Sensor Failure87
Error To Sensor Failure87
Error Twi Sensor Failure87
Error Two Sensor Failure88
Error Ttw Sensor Failure88
Error Tfi Sensor Failure88
Error Tho Sensor Failure89
Error Tho Sensor Detach Failure89
Error Tfi Detach Failure90
Error Lo Pressure Sensor Detach Failure90
Error Eeprom Failure91
Error Enhanced Ic Failure91
Outdoor Unit Failure Detection92
Diagnosis Procedure For Each Check Code92
Abnormal Outlet Temperature95
Power Source Failure (Voltage Defective, Open Phase)95
Heat Sink Overheat Failure96
Gas Leakage Detection96
4-Way Valve Invert Failure97
Hi Pressure Protection Operation98
Blower System Failure99
Compressor Drive Element Shorted Out99
Discharge Abnormality100
Discharge Temperature Sensor (Td) Failure100
Heat Exchanger Temperature Sensor (Te) Failure100
Outside Air Temperature Sensor (To) Failure100
Suction Temperature Sensor (Ts) Failure101
Heat Exchanger Sensor (Te, Ts) Wrong Wiring101
Temperature Sensor, Temperature-Resistance Characteristic Table102
Operation Check By Pc Board Switch103
9-5-1.Operation Check Mode103
Brief Method For Checking The Key Components104
9-6-1.Hydro Unit104
9-6-2.Outdoor Unit105
Hydro Unit And Outdoor Unit Settings106
Hydro Unit Function Code Setting107
How To Set Remote Controller Function Code107
Function Code Table108
Remote Controller Function Code Table109
Trial Operation110
Auto Curve Setting111
Time Setting112
Scheduled Operation Setting113
How To Start And Cancel Schedule Operation114
Frost Protection Setting114
Night Operation Setting115
How To Set Night Operation Start And End Time115
Anti Bacteria Setting116
Hot Water Boost Setting117
Nighttime Low-Noise Setting117
Forced Defrosting Setting118
Rated Operation Setting118
Display Function Of Set Temperature And Other Settings119
Failure History Calling Function120
Outdoor Unit Setting121
Service Support Functions (Led Indication, Switch Operation Method)122
Abnormality Indication124
Sensor, Current, Compressor Operation Frequency125
Special Operation For Maintenance And Inspection126
How To Exchange Main Parts128
Hydro Unit Parts Exchange128
Remote Controller Exchange129
Water Heat Exchanger Board Exchange129
Relay Board Exchange130
Electric Parts Assembly Exchange130
Side Board Exchange131
Upper Board Exchange131
Bottom Board Exchange131
Expansion Vessel Exchange132
Relief Valve Exchange132
Air Vent Valve Exchange132
Pump Exchange133
Flow Switch Exchange134
Manometer Exchange134
Heater Assembly Exchange135
Tc Sensor, Twi Sensor, Two Sensor, Tho Sensor Exchange135
Water Heat Exchanger Assembly Exchange136
Outdoor Unit Parts Exchange137
Outlet Cabinet Exchange138
Side Cabinet Exchange138
Electric Parts Replacement (Outdoor Unit)139
Fan Motor Exchange141
Compressor Exchange142
Pulse Motor Valve Coil Exchange145
Fan Guard Exchange146
Periodic Inspection Items155
Part Exploded View, Part List156