Toshiba HWS-1603H8-E Data Book

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8 kw 11/14 kw

Air to Water Heat Pump

Engineering Data Book

Hydro Unit

HWS-803XWHM3-E

HWS-803XWHT6-E

HWS-803XWHD6-E

HWS-803XWHT9-E

HWS-1403XWHM3-E

HWS-1403XWHT6-E

HWS-1403XWHD6-E

HWS-1403XWHT9-E

Outdoor Unit

HWS-803H-E

HWS-1103H-E

HWS-1403H-E

HWS-1103H8-E

HWS-1403H8-E

HWS-1603H8-E

HWS-1103H8R-E

HWS-1403H8R-E

HWS-1603H8R-E

Hot Water Cylinder

HWS-1501CSHM3-E

HWS-2101CSHM3-E

HWS-3001CSHM3-E

HWS-1501CSHM3-UK

HWS-2101CSHM3-UK

HWS-3001CSHM3-UK

E10-371

Table of Contents

Other manuals for Toshiba HWS-1603H8-E

Service Manual212 pages

Quick Reference43 pages

Installation Manual30 pages

Questions and Answers:

B
Brian KnightAug 4, 2025
Why is my Toshiba HWS-1603H8-E not heating or cooling properly?
- C
  Chase SmithAug 4, 2025
  There are several reasons why your Toshiba Heat Pump might not be heating or cooling correctly. It could be due to an incorrect remote controller setting, so check the operation and temperature settings. Alternatively, the function code setting might be incorrect, so refer to the function code table. Other potential causes include a disconnected backup heater (check the heater and bimetal thermostat), insufficient capacity (check the equipment selection), or a sensor defect (ensure the temperature sensor is installed correctly).
A
afloresAug 8, 2025
How to fix a Toshiba HWS-1603H8-E remote controller when nothing is displayed?
- C
  Cathy MartinAug 8, 2025
  If nothing is displayed on your Toshiba Heat Pump remote controller, there are a couple of things to check. First, ensure that power is being supplied to the remote controller by checking the power supply wiring. Also, verify the DIP switch setting on the Hydro Unit board and compare it with the function code table to ensure it is set correctly.
R
Ryan VanceAug 12, 2025
How to troubleshoot regular communication errors between the hydro unit and remote controller of my Toshiba Heat Pump?
- P
  pjordanAug 12, 2025
  To troubleshoot communication errors between the hydro unit and the remote controller, check the remote control connection. Also, there may be a defect in the remote control.
C
Christopher JonesAug 17, 2025
What causes regular communication errors between the hydro unit and outdoor unit of a Toshiba HWS-1603H8-E Heat Pump?
- A
  Ashley LongAug 17, 2025
  To address communication errors between the hydro unit and outdoor unit, check the serial circuit. Also, look for miswiring of the crossover between the water heat exchanger and the outdoor unit.
K
Kristi RichardsonAug 21, 2025
What to do if the flow rate switch is activated on my Toshiba HWS-1603H8-E Heat Pump and error code A01 appears?
- C
  Charles KlineAug 21, 2025
  If the flow rate switch is activated and error code A01 is displayed on your Toshiba Heat Pump, it could be due to several reasons: * Air in the pump: Release the air completely following the correct procedure. * Low hydraulic pressure: Adjust the hydraulic pressure considering the pipe height and add water until the manometer displays the set hydraulic pressure or higher. * Clogged strainer: Clean the strainer. * Large resistance on the hydro side: Widen the water path to the hydro unit or install a bypass valve. * Malfunction of motorized 3-way valve: Check the wiring and parts of the valve.
L
linda80Aug 25, 2025
Why is hot water leaking from the pressure relief valve of my Toshiba Heat Pump?
- J
  James ThompsonAug 26, 2025
  Hot water leaking from the pressure relief valve of your Toshiba Heat Pump could be caused by a few issues. First, there might be excessive hydraulic pressure; set the hydraulic pressure considering the pipe height, and replenish water until the manometer shows a value of set hydraulic pressure or more. Second, the expansion tank capacity might be insufficient compared to the total water amount; in this case, install another expansion tank. Finally, the expansion tank itself could be failing; check the air pressure.
D
dyoungAug 29, 2025
What to do if my Toshiba HWS-1603H8-E Heat Pump detects a gas leak?
- J
  Jackie AllenAug 29, 2025
  If your Toshiba Heat Pump detects a gas leak, check the refrigeration cycle for leaks. Also, ensure that the service valve is fully open and inspect the piping for any kinks. Check the pulse motor valve for defects and verify the resistance value of the discharge temperature sensor (TD) and the suction temperature sensor (TS).

Toshiba HWS-1603H8-E Specifications

General

Brand	Toshiba
Model	HWS-1603H8-E
Category	Heat Pump
Language	English

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