Manuals / Toshiba / Household Appliance / Heat Pump

Toshiba HWS-1402XWHM3-E, HWS-802XWHT6-E, HWS-802H-E A04 Error 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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[A04] Error Freeze prevention control

When the outside temperature or inlet water temperature is low (approx. 20°C or lower) and the room load is large (operation frequency rating), the freeze prevention control may be activated.

Start

Operation restart

Perform air vent

	Excess air
Yes	inside pump
	No
	Chattering from	Yes
	flow switch
	No

Water heat

exchanger board DP_SW11-1 No is ON

Yes

Backup

heater terminal has No 230ACV ( ± 23V)

Yes

Secure water
Secure water		Dirt clogging		Replace flow switch
circulation amount		Dirt clogging		Replace flow switch
circulation amount		inside water circuit
		inside water circuit

		(inside strainer, etc)

		12 M or longer		Fit buffer tank and the
		water pipe to		second pump
Circulation		water pipe to		second pump
		a branch, or 5 or
		a branch, or 5 or
flow shortage		less branches

Set DP_SW11-1 to ON

	Power is		No
	Power is				Connect backup heater
	connect to backup				Connect backup heater
	heater terminal				power cable
		Yes

					Set heater breaker to ON
					Set heater breaker to ON
					Check indoor wiring

	Backup		No
	heater element			Replace backup heater unit
	is conductive		(Backup heater NG)


	Yes
	TC, TWO, TWI		No
				Replace TC, TWO,
	sensor characteristics
			(See Characteristic table on page 101)	and TWI sensors
	are correct
	Yes

	Replace water heat
	exchange control board

77

Image 78

Toshiba HWS-1402XWHM3-E, HWS-802XWHT6-E, HWS-802H-E, HWS-802XWHM3-E, HWS-3001CSHM3-E(-UK) A04 Error Freeze prevention control

Contents

HWS-802XWHT6-E HWS-1102H-E HWS-1402XWHM3-E HWS-1402H-E Hydro Unit Outdoor UnitHot Water Cylinder HWS-1501CSHM3-E-UK HWS-2101CSHM3-E-UK HWS-3001CSHM3-E-UK Contents Method of Defect Diagnosis ∗ Ground wire of class D grounding About symbols∗ For details, see the schematic About indication No modification Do not modify the unit Do not make additional charge of the refrigerant∗ For details, see the parts price list Failure to do so may cause an electric shock ∗ Thick gloves such as cotton work gloves Safety During Installation and Service NEW Refrigerant R410A Copper pipe Installing refrigerant pipeSteel pipe and joint Wall thickness of copper pipe 3 Flare processing related dimension for R410A Flare and precautionsFlare dimension 4 Dimension of flare for R410A and flare nut Flare connecting procedure and precautions 5 Tightening torque of flare for R410A Reference values General tools Conventional tools are available ToolsNecessary tools Gauge manifold Recharging of refrigerant For refrigerant charging, see the figure below Cylinder without siphon Gauge manifold Outdoor unit Refrigerant cylinder Flux Brazing of pipesMaterials of brazing Brazing Prevention of oxidation during brazing Robber plug Specifications Page Outside Drawing Hydro unit HWS-802H-E HWS-1102H-E, 1402H-E HWS-3001CSHM3-E-UKHWS-2101CSHM3-E-UK HWS-1501CSHM3-E-UK Wiring Diagram Block of the outdoor unit Control board Hot Water Cylinder Unit Key Electric Component Rating HWS-802XWHM3-E, 802XWHT6-EModel name Component name Type name Rating M3-E T6-E Model name Component name Type name Rating M3-E T6-E T9-E Component name Type name Rating CAM-MD12TF-15US-622KXTMQO-SS OFF = 125 ± 4 C, on = 90 ± 5 C Thermal cut-out Model name Component nameType name Rating CSH Water Heat Exchange Control Board D503 Green, Outdoor = Hydro P01Red P02White Earth lead wire P09 BlackOutdoor Control Board F03 250 V, 10 a F700250V,3.15A System DiagramSystem Diagram Water Installation example of water circuit HWS-1402XWHM3-E, 1402XWHT6-E, 1402XWHT9-E/1102H-E, 1402H-E Refrigeration Cycle System DiagramHWS-802XWHM3-E, 802XWHT6-E/802H-E Outdoor unit Hydro unit Operational Description Hot water supply Temperature setting Operation Remote control settingsHeating Temperature setting Cooling Temperature setting Backup heater control Hot water temperature 40C to 75CHeating temperature 20C to 55C Hydro unit Cooling temperature 10C to 25C TransmitOutdoor unit Operation flow and applicable data, etc TTW sensorHot water cylinder unit TWI Pump priority Pressing the ZONE1, 2 button and then Operation ModeStarts a cooling operation Zone Operation with heating priority Simultaneous operations of hot water supply and cooling Heating side Switches to Hot water Supply operationHOT Water button set to on HOT Water Boost button set to on 75C Hot water operation Another 30 minutes can be set with FC0B HOT Water button set to onAnti bacteria Anti Bacteria operation Supply heater Night set back Night SET Back operation Operation 35B 30C 25D 20E Nighttime low-noise operation Operation Temperature settings Water outlet temperature Hz signal correctionController set temperature Inverter output change TC TWO TC=TWO THO Keep TSCF-0 TSCF-2Keep TSCF-4 Circulation pump control Hydro Unit Non-interlocked with the built-in pump SW1 Flow rateL/minSW3 SW2 SW3 1Piping freeze prevention control Automatic restart controlHeating operation Night Set Back Piping freeze prevention control TWOTWI, TWO, THO Hydro Unit Room temperature thermostat control Option TCB-PCMO3E PMV Pulse motor valve control Current release control Settings YesCurrent degradation Main circuit control current TL C WE tap + 1 tap/20 secs Number of rotation hold For 1102H-E Hot water supply and heating fan controlFor 802H-E For 1402H-E Heating operation starts Inside brackets For 802H-EOFF Output equal to 40W Not energizedIntermittently energized Continuously energized 802H-E 1102H-E, 1402H-E Heating Cooling TC TWO+2 61C Procedure of defect diagnosis Remark Method of Defect Diagnosis Matters to be confirmed first Check the power supply voltageAbout the installation of the temperature sensor 1 Non-defective operation How to determine from the check code on the remote control Outline of the determination diagramProcedure of defect diagnosis How to cancel a check code on the remote controller 2TWO How to diagnose by error codeDefect mode detected by the water heat exchange 3TWI Diagnostic functional operation Number Diagnostic functional operation Number Defect mode detected by the outdoor unit Diagnostic functional operation Number Diagnostic functional operation Number Defect mode detected by the remote control Diagnostic functional operationDetermination and action Diagnosis flow chart for each error code A01 Error Pump flow determinationHydro unit failure detection Replace TWI, TWO, and THO sensors A02 Error Temperature rise and error short circuitReplace flow switch Yes Water outlet A03 Error Temperature rise and error short circuit StartYes TTW 85C is detected Replace TTW sensor A04 Error Freeze prevention control A05 Error Piping freeze prevention control Water circuit Yes Lower set temperatureRemove waste Place buffer tank Cooling overload operation Yes Raise set temperatureWhere frost remains Yes Defrost outdoor unit Water cycle contains water Put water into water circuit Recommended 1 2 Bar A11 Error Release protection operation Secure water Waste stuck inside Remove wasteTWI sensor is Attach TWI sensor A12 Error Heating or Hot water supply heater failure E04 Error F06 Error TE sensor failure F03 Error TC sensor failureF04 Error TD sensor failure Yes Replace water heat exchange control board F07 Error TL sensor failure F08 Error to sensor failureF10 Error TWI sensor failure F11 Error TWO sensor failure F14 Error TTW sensor failureF17 Error TFI sensor failure F18 Error THO sensor failure F19 Error THO sensor detach failure Lo pressure sensor Yes Is detached CN207 When operation F20 Error TFI detach failureF23 Error Lo pressure sensor detach failure TFI s ensor Is attached to pipe L07 Error F29 Error Eeprom failureF30 Error Enhanced IC failure L09 Error Diagnosis procedure for each check code Outdoor Unit Failure Detection Compressor is normal Yes Board side Wiring connectionIs normal Check and correct Lock compressor Replace it Yes Check outdoor control board If defective, replace it Heat sink temperature sensor TH failure → See F13 detailsCommunication failure between MCUs Eeprom failure → See F31 details Power voltage abnormally Yes Outdoor control Deal with short circuit Short circuit, etc YesHeat sink overheat failure Is cleared, Blower is not blocked Way valve invert failure SW804 SW801 Heating operation Yes Outdoor fan operates normally Check the same item asElement Short circuit Correct wiring Replace outdoor board Power voltage is normal Check wiring 230ACV ±Diagram Yes Replace fan motor TL sensor resistance characteristic is normal Characteristic tableTL sensor connector CN604 is connected Correct TE sensor Suction temperature sensor TS failure TS sensor resistance characteristic is normal100 101 TC, TWI, TWO, TFI, TTW, TE, TS, to sensorsTD, TL sensors Operation check mode Operation check by PC board switchOperation check mode Rotary Check contents Remark Switch Hydro unit Component name Check procedureBrief method for checking the key components 103 802H-E 32.6 ± 3.3 Ω Outdoor unit104 14.8 ± 1.5 Ω 10Hydro unit and Outdoor Unit Settings Hydro unit Hydro unit Setting105 Hydro unit Function Code Setting 106 107 Details First shipment 108 Details Fist shipmentNighttime low-noise end time Trial Operation 109 110 Auto Curve SettingSet temperature A40 B35 C30 D25 E20 20 T1 TSC-F Time Setting 111 Scheduled Operation Setting Set temperature, day , and time112 Frost Protection Setting 113 Night Operation Setting 114 Anti Bacteria Setting 115 Hot Water Boost Setting Nighttime Low-noise Setting116 Forced Defrosting Setting Rated Operation Setting117 Display Function of Set Temperature and Other Settings 118 Failure History Calling Function 119 Outdoor unit Outdoor Unit Setting 120 121 122 Function and details 123 Current Compressor PMV openness Operation Pulse Frequency Item setting Temperature sensor124 LED indication Operation when press button switch SW801 is pressed 125SW804 SW804 Operation when press button switch SW801 is pressed 126 Hydro Unit 11How to Exchange Main PartsWork procedure Remarks 127 Remote Remote controller cable128 Controller holder Relay board Electric parts assembly129 MgSW 130 Exchange parts name Work procedure Remarks 131Expansion vessel Fixing 132Pump Board Exchanger inlet pipe so that the wire is place on 133Manometer 134 135 Outdoor Unit 2-1. HWS-802H-E 136 137 Lead Remove the power source cable from the power138 CN202 Black Fan motor lead Binding tie Compressor lead, Relay connector 139 Flange nut 140Propeller fan Turn it right to loosen Fan motor 141 142 143 Valve body 144Spring Pulse motor 145 146 Heat exchanger Inverter assembly147 Valve fixing board 148 Case thermostat, fan motorReactor lead CN05 White Reactor lead Name Electric parts Reactor Replacement 1Perform the step149 Reactor lead Binding tie Reactor body 150 Fixing rubber Projection/Refrigerant cycle side Fan motor 151 Compressor nut 3 nuts 152 Recess Pulse motor valve body Pulse motor valve coil 1. How to remove 1Perform the step153 Positioning Motorized Projection Control valve coil 12Periodic Inspection Items Inspection items154 13Part Exploded View, Part List 155 156 157 HWS802H-E 158Outdoor Unit 002 159 160 Inverter Assembly HWS-802H-ESensor assembly 701 F6 TS, TE, TD sensor TD, TL sensor 161 162 Outdoor Unit HWS-1102H-E, 1402H-E 163 Inverter Assembly HWS-1102H-E, 1402H-E 164TS, TE, to sensor Reactor 16543158190 4316V357 166