What is the Toshiba HWS-802XWHM3-E?

The Toshiba HWS-802XWHM3-E is an 8 kW split air-source heat pump with a COP of 4.08 and a maximum flow temperature of 55°C. It is designed for domestic heating and hot water applications, utilizing an outdoor unit paired with an indoor hydro unit and R410A refrigerant.

How do I register a Toshiba HWS-802XWHM3-E with BoilerTag?

Scan the QR code on the BoilerTag sticker after installation. Confirm the model details, which will pre-fill from the appliance catalogue, and record the installation date and Gas Safe or F-Gas number. Every future service log becomes a permanent, publicly viewable record for the property. The first 12 BoilerTag stickers are free for engineers. Order free BoilerTag stickers from the engineer dashboard.

What refrigerant does the HWS-802XWHM3-E use?

1.8 kg of R410A refrigerant. Because this is a split system, the refrigerant cycle is completed on-site by a qualified F-Gas engineer. R410A is a high-pressure HFC blend commonly used in legacy Estia models before the transition to R32.

What is the maximum flow temperature for the Toshiba Estia 8kW?

55°C. This temperature is sufficient for underfloor heating and modern radiator systems sized for low-temperature operation. For domestic hot water, the system can reach higher temperatures using the integrated backup heater or immersion elements in the cylinder.

What does fault code A01 mean on a Toshiba Estia?

A01 indicates a pump or flowing quantity error. This is typically triggered when the flow switch does not detect sufficient water movement for two minutes or the TC sensor exceeds 63°C. Engineers should check for air locks, debris in the filter, or a disconnected flow switch.

Which cylinders are compatible with the HWS-802XWHM3-E?

HWS-1501CSHM3-E, HWS-2101CSHM3-E, and HWS-3001CSHM3-E. These Estia-specific cylinders are designed to work with the hydro unit's control logic and sensors to ensure efficient hot water production and legionella protection cycles.

What is the COP of the Toshiba HWS-802XWHM3-E?

4.08 at A7W35 conditions. This means for every 1 kW of electricity consumed, the unit produces 4.08 kW of heat when the outside air is 7°C and the flow temperature is 35°C. Efficiency will vary based on outdoor ambient temperatures.

Does the HWS-802XWHM3-E require a buffer tank?

It depends on the system volume and minimum flow rate requirements. The unit requires a minimum water flow rate of 17.5 litres per minute. If the system volume is low or zones can close via TRVs, a buffer tank or volumiser is necessary to prevent short-cycling.

What is fault code P15 on this Toshiba heat pump?

P15 indicates a detected gas leak. This occurs when the discharge or suction temperature sensors detect abnormal values for 10 minutes. Engineers should inspect the refrigeration cycle for leaks, check the service valves are open, and verify the pulse motor valve operation.

What are the dimensions of the outdoor unit?

890mm high, 900mm wide, and 320mm deep. The outdoor unit weighs 63 kg and requires adequate clearance for airflow. The indoor hydro unit is 925mm high, 525mm wide, and 355mm deep, weighing 50 kg.

What does fault code A01 mean on the Toshiba HWS-802XWHM3-E?

Pump or flowing quantity error Likely causes: Almost no or little water flow; Not enough vent air; Dirt clogging in the water piping system; The water piping is too long; Installation of buffer tank and secondary pump; Disconnection of the flow switch connector; Defect of the flow switch. Check wat…

What does fault code A02 mean on the Toshiba HWS-802XWHM3-E?

Temperature increase error (heating) Likely causes: Sensor failure; Defect of the backup heater (defect automatic reset thermostat). Check the water inlet, water outlet and heater outlet (TWI, TWO, THO) sensors. Check backup heater thermostat.

What does fault code A03 mean on the Toshiba HWS-802XWHM3-E?

Temperature increase error (hot water supply) Likely causes: Sensor failure; Check the hot water cylinder thermal cut-out. Check the hot water cylinder sensor (TTW). Check the hot water cylinder thermal cut-out.

What does fault code A04 mean on the Toshiba HWS-802XWHM3-E?

Antifreeze operation Likely causes: Almost no or little water flow; Dirt clogging in the water piping system; The water piping is too long; Heater power circuit failure; Sensor failure. Check water flow and piping. Check heater power circuit (voltage, breaker, connection). Check TWI, TWO, TC sensor…

What does fault code A05 mean on the Toshiba HWS-802XWHM3-E?

Piping antifreeze operation Likely causes: Heater power circuit failure; Sensor failure; Disconnection of the backup heater. Check heater power circuit. Check TWI, TWO, THO sensors. Check backup heater connection.

What does fault code A07 mean on the Toshiba HWS-802XWHM3-E?

Pressure switch operation Likely causes: Almost no or little water flow; Defect of the flow switch; On-load operation; Defect in the pressure switch. Check water flow and flow switch. Check pressure switch.

What does fault code A08 mean on the Toshiba HWS-802XWHM3-E?

Low pressure sensor operation error Likely causes: Almost no or little water flow; Defect of the flow switch; On-load cooling or prolonged defrosting; Defect in the low pressure sensor. Check water flow and flow switch. Check low pressure sensor.

What does fault code A09 mean on the Toshiba HWS-802XWHM3-E?

Overheat protection operation Likely causes: No water (heating without water) or no water flow; Defect of the flow switch; Defect of the backup heater (poor automatic reset thermostat). Check water level and flow. Check flow switch. Check backup heater thermostat.

What does fault code A11 mean on the Toshiba HWS-802XWHM3-E?

Operation of the release protection Likely causes: Almost no water flow; Defect of the flow switch; Sensor failure. Check water flow and flow switch. Check water outlet temperature sensor (TWO).

What does fault code A12 mean on the Toshiba HWS-802XWHM3-E?

Heating, hot water heater Likely causes: Activated by a large load of heating or hot water supply; Heater power circuit failure. Check load. Check heater power circuit (backup or hot water cylinder heater).

What does fault code E03 mean on the Toshiba HWS-802XWHM3-E?

Regular communication error between hydro unit and remote controller Likely causes: Remote control connection failure; Defect in the remote control. Check remote control connection. Replace remote control.

What does fault code E04 mean on the Toshiba HWS-802XWHM3-E?

Regular communication error between hydro unit and outdoor unit Likely causes: Serial circuit failure; Miswiring of the crossover between the water heat exchanger and the outdoor unit. Check the serial circuit and crossover wiring.

What does fault code F03 mean on the Toshiba HWS-802XWHM3-E?

TC sensor error Likely causes: Sensor failure; Connection failure. Check the resistance value and connection of the heat exchange temperature sensor (TC).

What does fault code F10 mean on the Toshiba HWS-802XWHM3-E?

TWI sensor error Likely causes: Sensor failure; Connection failure. Check the resistance value and connection of the water inlet temperature sensor (TWI).

What does fault code F11 mean on the Toshiba HWS-802XWHM3-E?

TWO sensor error Likely causes: Sensor failure; Connection failure. Check the resistance value and connection of the water outlet temperature sensor (TWO).

What does fault code F14 mean on the Toshiba HWS-802XWHM3-E?

TTW sensor error Likely causes: Sensor failure; Connection failure. Check the resistance value and connection of the hot water cylinder sensor (TTW).

What does fault code F17 mean on the Toshiba HWS-802XWHM3-E?

TFI sensor error Likely causes: Sensor failure; Connection failure. Check the resistance value and disconnection of the floor-inlet temperature sensor (TFI).

What does fault code F18 mean on the Toshiba HWS-802XWHM3-E?

THO sensor error Likely causes: Sensor failure; Connection failure. Check the resistance value and disconnection of the heater outlet temperature sensor (THO).

What does fault code F19 mean on the Toshiba HWS-802XWHM3-E?

Detection of THO disconnection error Likely causes: Sensor disconnection. Check for any disconnection of the heater outlet temperature sensor (THO).

What does fault code F20 mean on the Toshiba HWS-802XWHM3-E?

TFI sensor error Likely causes: Sensor disconnection. Check any disconnection of the floor-inlet temperature sensor (TFI).

Toshiba HWS-802XWHM3-E Estia 8kW — Specs & Fault Codes

Engineer's overview

The Toshiba HWS-802XWHM3-E represents the 8 kW variant of the Estia split air-to-water heat pump range. As a split system, the refrigerant cycle is divided between the outdoor unit and the indoor hydro unit, connected by refrigerant piping rather than water-filled monobloc lines. This configuration eliminates the risk of external pipework freezing during power outages. Performance-wise, the unit is rated for a nominal 8 kW output at an outdoor temperature of 7°C and a water flow temperature of 35°C. Under these conditions, it achieves a Coefficient of Performance (COP) of 4.08. The system is designed to operate in ambient temperatures as low as -20°C, though the maximum flow temperature is capped at 55°C. This makes it suitable for well-insulated properties or those with emitters designed for lower temperature operation. The physical footprint is standard for its class. The outdoor unit measures 890mm in height, 900mm in width, and 320mm in depth, weighing 63 kg. Internally, the hydro unit measures 925mm by 525mm by 355mm and weighs 50 kg. It requires a 230V single-phase power supply and has a startup current of 9.24A. Hydraulic specifications include a maximum operating pressure of 3 bar and a minimum water flow rate requirement of 17.5 litres per minute. Control is managed via the HWS-AMS11E remote controller, which supports weather compensation to optimize efficiency based on outdoor ambient temperatures. For domestic hot water, the system is compatible with dedicated Estia cylinders such as the HWS-1501CSHM3-E or HWS-3001CSHM3-E. Maintenance and diagnostics are facilitated by a comprehensive fault code system. Common issues include A01 (flow switch or pump error), often caused by air in the system or debris in the pipework, and P03 (discharge temperature error), which may indicate a refrigerant leak or a pulse motor valve failure. Annual servicing is required, involving insulation resistance tests, refrigerant leak checks, and inspection of the water heat exchanger. Engineers should note that because the system contains 1.8 kg of R410A, F-Gas certification is mandatory for installation and refrigerant-side maintenance.

HWS-802XWHM3-E fault codes

Every fault code listed in the manufacturer brochure, with likely causes and engineer actions. Each code has a permalink — paste a URL like https://www.boilertag.com/heat-pumps/toshiba/hws-802xwhm3-e-2#fault-a01 to jump straight to the entry.

Complete list of fault codes for this Toshiba HWS-802XWHM3-E
Code	Meaning	Details
A01Lockout	Pump or flowing quantity error Show causes & actions Detected by TC sensor (TC >= 63C) or flow switch abnormality (no signal 2 min after pump start). Likely causes Almost no or little water flow Not enough vent air Dirt clogging in the water piping system The water piping is too long Installation of buffer tank and secondary pump Disconnection of the flow switch connector Defect of the flow switch Engineer action Check water flow and vent air. Clean dirt clogging. Check piping length. Verify flow switch connection and operation.	Details
A02	Temperature increase error (heating) Show causes & actions When one of the TWI, TWO and THO sensors exceeds 70C. Likely causes Sensor failure Defect of the backup heater (defect automatic reset thermostat) Engineer action Check the water inlet, water outlet and heater outlet (TWI, TWO, THO) sensors. Check backup heater thermostat.	Details
A03	Temperature increase error (hot water supply) Show causes & actions When the TTW sensor exceeds 85C. Likely causes Sensor failure Check the hot water cylinder thermal cut-out Engineer action Check the hot water cylinder sensor (TTW). Check the hot water cylinder thermal cut-out.	Details
A04Lockout	Antifreeze operation Show causes & actions Freeze protection conditions detected by TC, TWO, or TWI sensors. Likely causes Almost no or little water flow Dirt clogging in the water piping system The water piping is too long Heater power circuit failure Sensor failure Engineer action Check water flow and piping. Check heater power circuit (voltage, breaker, connection). Check TWI, TWO, TC sensors.	Details
A05	Piping antifreeze operation Show causes & actions Activating the heater does not achieve 5C after 30 min. Likely causes Heater power circuit failure Sensor failure Disconnection of the backup heater Engineer action Check heater power circuit. Check TWI, TWO, THO sensors. Check backup heater connection.	Details
A07Lockout	Pressure switch operation Show causes & actions The pressure switch operates for 300 sec continuously during heat pump operation. Likely causes Almost no or little water flow Defect of the flow switch On-load operation Defect in the pressure switch Engineer action Check water flow and flow switch. Check pressure switch.	Details
A08Lockout	Low pressure sensor operation error Show causes & actions The low pressure sensor detected 0.2 MPa or less. Likely causes Almost no or little water flow Defect of the flow switch On-load cooling or prolonged defrosting Defect in the low pressure sensor Engineer action Check water flow and flow switch. Check low pressure sensor.	Details
A09Lockout	Overheat protection operation Show causes & actions When the thermostat of the backup heater activates. Likely causes No water (heating without water) or no water flow Defect of the flow switch Defect of the backup heater (poor automatic reset thermostat) Engineer action Check water level and flow. Check flow switch. Check backup heater thermostat.	Details
A11Lockout	Operation of the release protection Show causes & actions When the TWO release counts to 10. Likely causes Almost no water flow Defect of the flow switch Sensor failure Engineer action Check water flow and flow switch. Check water outlet temperature sensor (TWO).	Details
A12	Heating, hot water heater Show causes & actions Antifreeze control detected under specific TWI/TTW conditions after heater backup. Likely causes Activated by a large load of heating or hot water supply Heater power circuit failure Engineer action Check load. Check heater power circuit (backup or hot water cylinder heater).	Details
E03	Regular communication error between hydro unit and remote controller Show causes & actions No regular communication from the remote control for 3 min. Likely causes Remote control connection failure Defect in the remote control Engineer action Check remote control connection. Replace remote control.	Details
E04	Regular communication error between hydro unit and outdoor unit Show causes & actions The serial signal cannot be received from outdoor. Likely causes Serial circuit failure Miswiring of the crossover between the water heat exchanger and the outdoor unit Engineer action Check the serial circuit and crossover wiring.	Details
F03	TC sensor error Show causes & actions Open or short circuit in the heat exchange temperature sensor. Likely causes Sensor failure Connection failure Engineer action Check the resistance value and connection of the heat exchange temperature sensor (TC).	Details
F10	TWI sensor error Show causes & actions Open or short circuit in the water inlet temperature sensor. Likely causes Sensor failure Connection failure Engineer action Check the resistance value and connection of the water inlet temperature sensor (TWI).	Details
F11	TWO sensor error Show causes & actions Open or short circuit in the water outlet temperature sensor. Likely causes Sensor failure Connection failure Engineer action Check the resistance value and connection of the water outlet temperature sensor (TWO).	Details
F14	TTW sensor error Show causes & actions Open or short circuit in the hot water cylinder sensor. Likely causes Sensor failure Connection failure Engineer action Check the resistance value and connection of the hot water cylinder sensor (TTW).	Details
F17	TFI sensor error Show causes & actions Open or short circuit in the floor temperature sensor. Likely causes Sensor failure Connection failure Engineer action Check the resistance value and disconnection of the floor-inlet temperature sensor (TFI).	Details
F18	THO sensor error Show causes & actions Open or short circuit in the heater outlet temperature sensor. Likely causes Sensor failure Connection failure Engineer action Check the resistance value and disconnection of the heater outlet temperature sensor (THO).	Details
F19Lockout	Detection of THO disconnection error Show causes & actions When TWO-THO > 15K is detected and 30 sec elapsed. Likely causes Sensor disconnection Engineer action Check for any disconnection of the heater outlet temperature sensor (THO).	Details
F20Lockout	TFI sensor error Show causes & actions When TWO-TFI > 30K is detected and TFI < TWI-5K is detected. Likely causes Sensor disconnection Engineer action Check any disconnection of the floor-inlet temperature sensor (TFI).	Details
F23	Low pressure sensor error Show causes & actions When PS < 0.07 MPa is detected for 2 sec or more. Likely causes Sensor disconnection Sensor failure Engineer action Check for any disconnection of the low pressure sensor. Check resistance value.	Details
F29Lockout	EEROM error Show causes & actions Inconsistency detected in non-volatile memory. Likely causes Memory failure Engineer action Replace the water heat exchange control board.	Details
F30Lockout	Extended IC error Show causes & actions When the extended IC is abnormal. Likely causes IC failure Engineer action Replace the water heat exchange control board.	Details
L07Lockout	Communication error Show causes & actions Individual hydro units have a group line. Likely causes Addressing conflict Engineer action Replace the water heat exchange control board.	Details
L09Lockout	Communication error Show causes & actions The capability of the hydro unit has not been set. Likely causes Configuration error Engineer action Check the setting of the FC01 capability specifications.	Details
L16Lockout	Setting error Show causes & actions When ZONE1 has not been set, while ZONE2 has been set. Likely causes Configuration error Engineer action Check the body DP-SW12_2,3.	Details
F04Lockout	TD sensor error Show causes & actions Open or short circuit in the discharge temperature sensor. Likely causes Sensor failure Engineer action Check the resistance value and connection of the discharge sensor (TD).	Details
F06Lockout	TE sensor error Show causes & actions Open or short circuit in the heat exchange temperature sensor. Likely causes Sensor failure Engineer action Check the resistance value and connection of the heat exchange temperature sensor (TE).	Details
F07Lockout	TL sensor error Show causes & actions Open or short circuit in the heat exchange temperature sensor. Likely causes Sensor failure Engineer action Check the resistance value and connection of the heat exchange temperature sensor (TL).	Details
F08Lockout	TO sensor error Show causes & actions Open or short circuit in the outdoor temperature sensor. Likely causes Sensor failure Engineer action Check the resistance value and connection of the outdoor temperature sensor (TO).	Details
F12Lockout	TS sensor error Show causes & actions Open or short circuit in the suction temperature sensor. Likely causes Sensor failure Engineer action Check the resistance value and connection of the suction temperature sensor (TS).	Details
F13Lockout	TH sensor error Show causes & actions Open or short circuit in the heat-sink temperature sensor. Likely causes Sensor failure Engineer action Check the resistance value and connection of the heat-sink temperature sensor (TH).	Details
F15Lockout	TE, TS sensors error Show causes & actions Open or short circuit in the temperature sensors. Likely causes Wrong installation Engineer action Check for any wrong installation of the heat exchange temperature sensor (TE) and the suction temperature sensor (TS).	Details
F31Lockout	EEPROM error Show causes & actions Outdoor unit EEPROM failure. Likely causes Memory failure Engineer action Check outdoor control board.	Details
H01Lockout	Compressor breakdown Show causes & actions Operation frequency lowers due to current release or limit control, or excess current detected. Likely causes Power supply voltage issue Over-loaded condition of the refrigeration cycle Service valve not fully open Engineer action Check the power supply voltage (AC230 V +/- 23 V). Check for over-load. Verify service valve is open.	Details
H02Lockout	Compressor lock Show causes & actions Input current detected but activation not completed. Likely causes Defect of compressor (lock) Defect of compressor wiring (open phase) Engineer action Replace the compressor. Check compressor wiring.	Details
H03Lockout	Defect in the current detection circuit Show causes & actions Current detection circuit failure on inverter board. Likely causes Board failure Engineer action Replace the outdoor inverter control board.	Details
H04Lockout	Operation of case thermostat Show causes & actions When the case thermostat exceeds 125C. Likely causes Gas leak Case thermostat or connector failure Service valve not fully open Defect of the pulse motor valve Kinked piping Engineer action Check refrigeration cycle for leaks. Check case thermostat and connector. Verify service valve and PMV. Check for kinked pipes.	Details
L10Lockout	Unset service PC board jumper Show causes & actions Jumpers J800-J803 have not been cut. Likely causes Installation error Engineer action Cut J800-J803.	Details
L29Lockout	The communication between the outdoor PC board MUCs error Show causes & actions No communication signal between IPDU and CDB. Likely causes Board failure Engineer action Replace the outdoor control board.	Details
P03Lockout	The outlet temperature error Show causes & actions When the discharge temperature sensor (TD) exceeds 111C. Likely causes Gas leak Defect of the pulse motor valve TD sensor resistance failure Engineer action Check refrigeration cycle for leaks. Check PMV. Check TD sensor resistance.	Details
P04Lockout	The high pressure switch error Show causes & actions High pressure switch activation. Likely causes High pressure condition Engineer action Check high pressure switch and system pressure.	Details
P05Lockout	The power supply voltage error Show causes & actions When the power supply voltage is extremely high or low. Likely causes Power supply issue Engineer action Check the power supply voltage (AC230 V +/- 23 V).	Details
P07Lockout	Overheating of heat-sink error Show causes & actions When the heat-sink exceeds 105C. Likely causes Loose screws in motor drive element Radiation grease not applied Blocked ventilation flue Engineer action Tighten screws. Apply radiation grease. Clear ventilation obstacles.	Details
P15Lockout	Detection of gas leak Show causes & actions Discharge or suction temperature sensors detect abnormal values for 10 min. Likely causes Gas leak Service valve not fully open Defect of the pulse motor valve Piping collapse Sensor failure Engineer action Check refrigeration cycle for leaks. Verify service valve and PMV. Check for piping collapse. Check TD and TS sensors.	Details
P19Lockout	The 4-way valve inversion error Show causes & actions Abnormal temperature detected at TE or TS sensors during operation. Likely causes 4-way valve unit or coil failure Defect of the pulse motor valve Sensor failure Engineer action Check 4-way valve operation and coil. Check PMV. Check TE and TS sensors.	Details
P20Lockout	High pressure protection operation Show causes & actions Abnormal stop due to high pressure release control. Likely causes Service valve not fully open Defect of the pulse motor valve Outdoor fan system failure Over-filling of refrigerant Sensor failure Engineer action Check service valve and PMV. Check outdoor fan. Verify refrigerant charge. Check TL and TWO sensors.	Details
P22Lockout	Outdoor fan system error Show causes & actions DC fan rotor position detection NG or abnormal motor current. Likely causes Motor fan lock Fan motor cable connection failure Power supply voltage issue Engineer action Check fan lock status. Check cable connection. Check power supply voltage.	Details
P26Lockout	Short circuit of the compressor driver element error Show causes & actions Abnormal short circuit of IGBT detected. Likely causes Control board failure Compressor rare short Engineer action Check control board. Check compressor.	Details
P29Lockout	Compressor rotor position error Show causes & actions The rotor position in the compressor cannot be detected. Likely causes Inverter control board failure Compressor short circuit Engineer action Replace inverter control board. Replace compressor.	Details

Common HWS-802XWHM3-E problems & troubleshooting

Patterns that group across the manufacturer's fault-code table. Each entry links to the full code listing further down the page.

How to fix the HWS-802XWHM3-E pump or flowing quantity errorLockout

Engineer: Check water flow and vent air. Clean dirt clogging. Check piping length. Verify flow switch connection and operation.

Triggered by fault code A01.

How to fix the HWS-802XWHM3-E antifreeze operationLockout

Engineer: Check water flow and piping. Check heater power circuit (voltage, breaker, connection). Check TWI, TWO, TC sensors.

Triggered by fault code A04.

How to fix the HWS-802XWHM3-E pressure switch operationLockout

Engineer: Check water flow and flow switch. Check pressure switch.

Triggered by fault code A07.

HWS-802XWHM3-E

HWS-802XWHM3-E at a glance

HWS-802XWHM3-E

HWS-802XWHM3-E at a glance

Register this Toshiba HWS-802XWHM3-E on BoilerTag

HWS-802XWHM3-E data sheet

Engineer's overview

HWS-802XWHM3-E fault codes

Common HWS-802XWHM3-E problems & troubleshooting

How to fix the HWS-802XWHM3-E pump or flowing quantity errorLockout

How to fix the HWS-802XWHM3-E antifreeze operationLockout

How to fix the HWS-802XWHM3-E pressure switch operationLockout

How to fix the HWS-802XWHM3-E low pressure sensor operation errorLockout

HWS-802XWHM3-E FAQs

Every boiler brochure, free with BoilerTag

Working on a Toshiba HWS-802XWHM3-E?

How to fix the HWS-802XWHM3-E overheat protection operationLockout

Likely causes that trigger multiple HWS-802XWHM3-E fault codes

HWS-802XWHM3-E at a glance

HWS-802XWHM3-E at a glance

Register this Toshiba HWS-802XWHM3-E on BoilerTag

HWS-802XWHM3-E data sheet

Engineer's overview

HWS-802XWHM3-E fault codes

Common HWS-802XWHM3-E problems & troubleshooting

How to fix the HWS-802XWHM3-E pump or flowing quantity errorLockout

How to fix the HWS-802XWHM3-E antifreeze operationLockout

How to fix the HWS-802XWHM3-E pressure switch operationLockout

How to fix the HWS-802XWHM3-E low pressure sensor operation errorLockout

HWS-802XWHM3-E FAQs

What is the maximum flow temperature for the Toshiba Estia 8kW?

What does fault code A01 mean on a Toshiba Estia?

Which cylinders are compatible with the HWS-802XWHM3-E?

What is the COP of the Toshiba HWS-802XWHM3-E?

Does the HWS-802XWHM3-E require a buffer tank?

What is fault code P15 on this Toshiba heat pump?

What are the dimensions of the outdoor unit?

Every boiler brochure, free with BoilerTag

Other Toshiba heat pumps

Working on a Toshiba HWS-802XWHM3-E?

How to fix the HWS-802XWHM3-E overheat protection operationLockout

Likely causes that trigger multiple HWS-802XWHM3-E fault codes