Manuals / Toshiba / Household Appliance / Heat Pump

Toshiba HWS-2101CSHM3-E(-UK), HWS-802XWHT6-E A12 Error Heating or Hot water supply heater failure

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 84

[A12] Error Heating or Hot water supply heater failure

Restart

Operation starts under 10 TWI 20°C

Freeze prevention control is detected once

Heater backup operation Heating: Booster heater

Hot water supply: Hot water cylinder heater

After 1 hour since heater operation started, neither TWI 15°C

nor TTW 20°C is met

	Water heat	No
	exchanger board DPSW11-1,2	No
	exchanger board DPSW11-1,2
	is ON
	Yes
	Backup heater or	No
	hot water cylinder terminal	No
	hot water cylinder terminal
	has 230ACV ( ± 23V)

A12 abnormality detection

Set water heat board DPSW11-1,2 to ON

	Yes	Power is connect		No	Place electric wire for
	Yes	Power is connect			backup heater
		to backup heater or hot water			backup heater
		to backup heater or hot water			Place electric wire for
		cylinder terminal			Place electric wire for
		cylinder terminal			hot water cylinder
					hot water cylinder
			Yes
			Yes		Set breaker for backup
					heater to ON
					Set breaker for hot water
					Set breaker for hot water
					cylinder to ON
					or check indoor wiring

Backup heater element	No
Backup heater element
is conductive	(Backup heater NG)
Yes
Hot water	No
Hot water
cylinder heater element
cylinder heater element	(Hot water cylinder heater NG)
is conductive	(Hot water cylinder heater NG)
Yes
TWI, TTW sensor
TWI, TTW sensor	No
characteristics are
characteristics are	(See characteristic table in page 101)
normal	(See characteristic table in page 101)
normal
Yes

Replace water heat
exchange control board

Replace booster heater unit and safety valve

Replace hot water cylinder heater

(Refer to hot water cylinder guide)

Replace TWI or TTW sensor

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Image 84

Toshiba HWS-2101CSHM3-E(-UK), HWS-802XWHT6-E, HWS-802H-E, HWS-1402H-E A12 Error Heating or Hot water supply heater failure

Contents

Hydro Unit Outdoor Unit Hot Water CylinderHWS-802XWHT6-E HWS-1102H-E HWS-1402XWHM3-E HWS-1402H-E HWS-1501CSHM3-E-UK HWS-2101CSHM3-E-UK HWS-3001CSHM3-E-UK Contents Method of Defect Diagnosis About symbols ∗ For details, see the schematic∗ Ground wire of class D grounding 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 Installing refrigerant pipe Steel pipe and jointCopper pipe Wall thickness of copper pipe Flare and precautions Flare dimension3 Flare processing related dimension for R410A 4 Dimension of flare for R410A and flare nut Flare connecting procedure and precautions 5 Tightening torque of flare for R410A Reference values Tools Necessary toolsGeneral tools Conventional tools are available Gauge manifold Recharging of refrigerant For refrigerant charging, see the figure below Cylinder without siphon Gauge manifold Outdoor unit Refrigerant cylinder Brazing of pipes Materials of brazingFlux 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 Model name Component name Type name RatingThermal cut-out CSH Water Heat Exchange Control Board P01Red P02White Earth lead wire P09 Black Outdoor Control BoardD503 Green, Outdoor = Hydro F03 250 V, 10 a F700250V,3.15A Diagram System DiagramSystem Water Installation example of water circuit Refrigeration Cycle System Diagram HWS-802XWHM3-E, 802XWHT6-E/802H-EHWS-1402XWHM3-E, 1402XWHT6-E, 1402XWHT9-E/1102H-E, 1402H-E Outdoor unit Hydro unit Operational Description Operation Remote control settings Heating Temperature settingHot water supply Temperature setting Cooling Temperature setting Hot water temperature 40C to 75C Heating temperature 20C to 55CBackup heater control Hydro unit Cooling temperature 10C to 25C TransmitOutdoor unit Operation flow and applicable data, etc TTW sensorHot water cylinder unit TWI Pressing the ZONE1, 2 button and then Operation Mode Starts a cooling operationPump priority Zone Operation with heating priority Simultaneous operations of hot water supply and cooling Switches to Hot water Supply operation HOT Water button set to on HOT Water Boost button set to onHeating side 75C Hot water operation HOT Water button set to on Anti bacteria Anti Bacteria operationAnother 30 minutes can be set with FC0B Supply heater Night set back Night SET Back operation Operation 35B 30C 25D 20E Nighttime low-noise operation Operation Hz signal correction Controller set temperatureTemperature settings Water outlet 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 Flow rateL/min SW3 SW2SW1 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 Settings Yes Current degradationCurrent release control Main circuit control current TL C WE tap + 1 tap/20 secs Number of rotation hold Hot water supply and heating fan control For 802H-EFor 1102H-E For 1402H-E Heating operation starts Inside brackets For 802H-EOFF Not energized Intermittently energizedOutput equal to 40W Continuously energized 802H-E 1102H-E, 1402H-E Heating Cooling TC TWO+2 61C Procedure of defect diagnosis Remark Method of Defect Diagnosis Check the power supply voltage About the installation of the temperature sensorMatters to be confirmed first 1 Non-defective operation Outline of the determination diagram Procedure of defect diagnosisHow to determine from the check code on the remote control How to cancel a check code on the remote controller How to diagnose by error code Defect mode detected by the water heat exchange2TWO 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 A02 Error Temperature rise and error short circuit Replace flow switchReplace TWI, TWO, and THO sensors 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 Yes Lower set temperature Remove wasteWater circuit Place buffer tank Yes Raise set temperature Where frost remainsCooling overload operation 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 F03 Error TC sensor failure F04 Error TD sensor failureF06 Error TE 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 F20 Error TFI detach failure F23 Error Lo pressure sensor detach failureLo pressure sensor Yes Is detached CN207 When operation TFI s ensor Is attached to pipe F29 Error Eeprom failure F30 Error Enhanced IC failureL07 Error L09 Error Diagnosis procedure for each check code Outdoor Unit Failure Detection Board side Wiring connection Is normal Check and correctCompressor is normal Yes Lock compressor Replace it Yes Heat sink temperature sensor TH failure → See F13 details Communication failure between MCUsCheck outdoor control board If defective, replace it Eeprom failure → See F31 details Power voltage abnormally Yes Deal with short circuit Short circuit, etc Yes Heat sink overheat failureOutdoor control 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 Power voltage is normal Check wiring 230ACV ± Diagram YesCorrect wiring Replace outdoor board Replace fan motor Characteristic table TL sensor connector CN604 is connectedTL sensor resistance characteristic is normal 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 by PC board switch Operation check modeOperation check mode Rotary Check contents Remark Switch Component name Check procedure Brief method for checking the key componentsHydro unit 103 Outdoor unit 104802H-E 32.6 ± 3.3 Ω 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 Auto Curve Setting Set temperature A40 B35 C30 D25 E20 20 T1110 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 Item setting Temperature sensor 124Current Compressor PMV openness Operation Pulse Frequency LED indication Operation when press button switch SW801 is pressed 125SW804 SW804 Operation when press button switch SW801 is pressed 126 11How to Exchange Main Parts Work procedure RemarksHydro Unit 127 Remote controller cable 128Remote Controller holder Electric parts assembly 129Relay board MgSW 130 Exchange parts name Work procedure Remarks 131Expansion vessel 132 PumpFixing Board Exchanger inlet pipe so that the wire is place on 133Manometer 134 135 Outdoor Unit 2-1. HWS-802H-E 136 137 Remove the power source cable from the power 138Lead CN202 Black Fan motor lead Binding tie Compressor lead, Relay connector 139 140 Propeller fan Turn it right to loosenFlange nut Fan motor 141 142 143 144 SpringValve body Pulse motor 145 146 Inverter assembly 147Heat exchanger Valve fixing board 148 Case thermostat, fan motorReactor lead CN05 White Name Electric parts Reactor Replacement 1Perform the step 149Reactor lead Reactor lead Binding tie Reactor body 150 Fixing rubber Projection/Refrigerant cycle side Fan motor 151 Compressor nut 3 nuts 152 Pulse motor valve coil 1. How to remove 1Perform the step 153Recess Pulse motor valve body Positioning Motorized Projection Control valve coil 12Periodic Inspection Items Inspection items154 13Part Exploded View, Part List 155 156 157 158 Outdoor UnitHWS802H-E 002 159 Inverter Assembly HWS-802H-E Sensor assembly 701 F6 TS, TE, TD sensor160 TD, TL sensor 161 162 Outdoor Unit HWS-1102H-E, 1402H-E 163 Inverter Assembly HWS-1102H-E, 1402H-E 164TS, TE, to sensor 165 43158190Reactor 4316V357 166