Manuals / Toshiba / Household Appliance / Heat Pump

Toshiba HWS-1402XWHT9-E, HWS-802XWHT6-E, HWS-802H-E A05 Error Piping freeze prevention control

Models: HWS-1402XWHT9-E HWS-1402XWHM3-E HWS-1402XWHT6-E HWS-1501CSHM3-E(-UK) HWS-1402H-E HWS-2101CSHM3-E(-UK) HWS-3001CSHM3-E(-UK) HWS-802XWHM3-E HWS-802H-E HWS-802XWHT6-E

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Page 79

[A05] Error Piping freeze prevention control

[A05] Error Piping freeze prevention control

Restart

TWI4, TWO 4, or

THO4 is detected

Circulation pump keeps

being energized or 3 minutes passed after the start

Water heat	No
exchange control board	No
exchange control board
DPSW11-1 is ON
Yes
Backup heater terminal	No
has 230ACV ( ± 23V)
Yes	Power is connect to	No
	built-in heater terminal
	Yes

	Backup heater element	No
	Backup heater element
	is conductive	(Backup heater NG)
	Yes
	TWI, TWO, THO	No
	sensor characteristics	(See characteristic table in page 101)
	are correct	(See characteristic table in page 101)
	are correct
	Yes

	Replace water heat
	exchange control board

Set water heat board

DPSW11-1 to ON

Place power cable for backup heater

Set breaker for backup heater to ON, or Check indoor

electronic wiring

Replace backup heater and safety valve

Replace TWI, TWO, and THO sensors

78

Image 79

Toshiba HWS-1402XWHT9-E, HWS-802XWHT6-E, HWS-802H-E, HWS-802XWHM3-E, HWS-1402H-E A05 Error Piping freeze prevention control

Contents

Hot Water Cylinder AIR TO WATER HEAT PUMPHydro Unit Outdoor UnitContents 9 Method of Defect Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DANGER 1 SAFETY PRECAUTIONSAbout symbols DANGER•Do not disassemble or modify the parts also • Failure to do so may cause an electric shock 2 NEW REFRIGERANT R410A 2-1.Safety During Installation and ServiceTable 2-1Wall thickness of copper pipe 2-2.Installing refrigerant pipe2-2-1.Steel pipe and joint Copper pipeFigure Flare and precautionsFlare dimension 2-2-2.Processing of piping materialsTightening torque N•m kgf•m Flare connecting procedure and precautionsNominal diameter Outer diameter mm2-3-1.Necessary tools 2-3.ToolsGeneral tools Conventional tools are available Fig. 2-4-1Configuration of refrigerant charging 2-4.Recharging of refrigerantCylinder with siphon Characteristics of flux 2-5.Brazing of pipesLow temperature brazing metal Why flux is necessaryFig Prevention of oxidation during brazing Specifications Unit name HWS-1402XWHM3-E, 1402XWHT6-E, 1402XWHT9-E 4 Outside Drawing4-1.Hydro unit HWS-802XWHM3-E, 802XWHT6-EHWS-802H-E Outdoor unitHWS-1102H-E, 1402H-E HWS-3001CSHM3-E-UKHWS-2101CSHM3-E-UK 4-3.Hot water cylinderHWS-1501CSHM3-E-UK HWS-802XWHT6-E Wiring DiagramHydro Unit HWS-1402XWHT9-EControl board 5-2.Outdoor Unit5-3.Hot Water Cylinder Unit 6-1.Hydro Unit Key Electric Component RatingHWS-802XWHM3-E, 802XWHT6-E Type name HWS-1402XWHM3-E, 1402XWHT6-E, 1402XWHT9-EModel name Component nameHWS-802H-E 6-2.Outdoor UnitHWS-1102H-E, 1402H-E 6-3.Hot Water Cylinder Unit 6-4.Water Heat Exchange Control Board HWS-802H-E 6-5.Outdoor Control BoardHWS-1102H-E, 1402H-E 7-1.Water DiagramSystem Diagram SystemInstallation example of water circuit R410A ... 1.8 kg 7-2.Refrigeration Cycle System DiagramHWS-802XWHM3-E, 802XWHT6-E/802H-E RefrigerantItem 8 Operational DescriptionItem Item Item Hot water cylinder unit ItemOperation flow and applicable data, etc TTW sensor2 Heating operation 3 Cooling operation Operation HOT WATER button set to ON Switches to Hot waterItem Operation flow and applicable data, etc8 Anti bacteria ANTI BACTERIA operation 9 Night set back NIGHT SET BACK operation 11 AUTO operation 12 Nighttime low-noiseoperation Hydro unit Hz signal correctionItem Operation flow and applicable data, etc1-2High temperature release control 2 Heater control 2 Control at the time of heating heater operation 3 Circulation pump control Flow rateL/min Operation flow and applicable data, etcFlow rateL/min Operation flow and applicable data, etc Item8-1Pipingfreeze prevention control 8-2Piping freeze prevention control 3. Hydro Unit 111 109 106 103 96 ItemOperation flow and applicable data, etc TD CCurrent degradation SettingsItem Operation flow and applicable data, etcWE tap ItemOperation flow and applicable data, etc TL C2tap/20 secs to W1 21 1tap/20 secs to W1 ItemOperation flow and applicable data, etc TE C 2tap/20 secs to W1 24 Stop time countOutdoor PMV 0pulse CompressorOutdoor fan 4-wayvalveUsual when TO sensor failsa b c d e ItemOperation flow and applicable data, etc Heating TC Cooling TL C9 Method of Defect Diagnosis 9-1.Matters to be confirmed first 9-3.Outline of the determination diagram Defect mode detected by the water heat exchange 9-3-4.How to diagnose by error codePage Page Defect mode detected by the outdoor unit Page Page Defect mode detected by the remote control A01 Error Pump flow determination 9-4.Diagnosis flow chart for each error code9-4-1.Hydro unit failure detection Page Page A04 Error Freeze prevention control A05 Error Piping freeze prevention control Page Page Page A11 Error Release protection operation Page E04 Error F04 Error TD sensor failure F03 Error TC sensor failureF06 Error TE sensor failure F08 Error TO sensor failure F07 Error TL sensor failureF10 Error TWI sensor failure F14 Error TTW sensor failure F11 Error TWO sensor failureF17 Error TFI sensor failure F19 Error THO sensor detach failure F18 Error THO sensor failureF23 Error Lo pressure sensor detach failure F20 Error TFI detach failureL09 Error F29 Error EEPROM failureF30 Error Enhanced IC failure L07 Error9-4-2.Outdoor Unit Failure Detection Diagnosis procedure for each check codeCheck code Any of the following abnormality may occur Check code Check code Check code Check code Check code Check code Check code TD, TL sensors TC, TWI, TWO, TFI, TTW, TE, TS, TO sensors9-5-1.Operation check mode 9-5.Operation check by PC board switchOperation check mode 9-6-1.Hydro unit 9-6.Brief method for checking the key components9-6-2.Outdoor unit Hydro unit 1. Hydro unit Setting 10Hydro unit and Outdoor Unit Settings2. Hydro unit Function Code Setting First shipment Function code tableItem DetailsFist shipment Remote controller function code tableItem Details1, 4 1, 4 2,3. Trial Operation 4. Auto Curve Setting 1 4 5. Time Setting3,6,7 6. Scheduled Operation Setting2,3 1,3 7. Frost Protection Setting3 2,4 8. NIGHT Operation Setting2 3 4 9. Anti Bacteria Setting3 2,4 51 11. Nighttime Low-noiseSetting 10. Hot Water Boost Setting13. Rated Operation Setting 12. Forced Defrosting Settingand CL Sensor temperature display callingbutton for temperature setting Press the TESTdisplay 15. Failure History Calling Function3 Pressing the TEST button returns to the normalOutdoor unit 16 Outdoor Unit Setting For display Note: All the LEDs have no color when off1 Overview For operationFunction and details 2 LED indication switching SW800, SW803 operation2 -1.Indication switching list Switch2 -2.Abnormality indication Current value for the outdoor unit only is shown <Special operation> CN701 Between 1 to 4 Voltage = Approx. 1. Hydro Unit 11How to Exchange Main PartsWork procedure Relay board Work procedureElectric parts assembly RemarksExchange parts name Exchange parts name Work procedureRemarks fixing Work procedureRemarks PumpExchange parts name Work procedureFlow switch Flow switchExchange parts name Exchange parts name Remarks Work procedure2.Outdoor Unit 2-1. HWS-802H-E Exchange partsExchange parts name Remarks Work procedureCompressor lead, Relay connector Exchange partsExchange parts name name name SW804 Work procedureExchange parts Remarksname 2-2. HWS-1102H-E, 1402H-E Exchange parts name Exchange parts name name name Recess Pulse motor valve body Work procedureExchange parts Remarks<Inspection items> 12Periodic Inspection ItemsHydro Unit 13Part Exploded View, Part ListPage Number of pieces per unit HWS802H-E Outdoor UnitSafety 707 Fuse Inverter Assembly HWS-802H-EReactor Control board assembly Bushing Collar Sensor assembly 701 F6 TS, TE, TD sensorSafety Outdoor Unit HWS-1102H-E, 1402H-E Safety Terminal 3P Inverter Assembly HWS-1102H-E, 1402H-EReactor Control board assembly Bushing Collar 707 FuseSafety