Category: Technical Information

Heatpump Repair Services

As with any electrical device, things can go wrong. Nothing is infallible, unfortunately. So what can go wrong with heatpumps and what can you do about it?


There are a few problems that can come up from simply not turning on to cooling problems, heating problems and such like. For example, if it simply does not turn on, there may be a tripped circuit breaker or a blown fuse or other things.  Let’s look at this problem further.  First check the circuit breaker by flipping it to the closed position to determine the cause of the overload.  If it is a blown fuse, replace the fuse and try determine the overload cause. The same thing with a compressor overload.  A bad transformer or heat pump contactor needs to be replaced.  If the heat pump doesn’t start and you hear a humming noise it may be the start capacitor, compressor motor, compressor bearings or such which may need to be replaced.

With cooling or heating problems, first check the thermostat is set properly and is working.  Check that the room-heating registers are open.  Check the filter is clean and clear and installed properly.  You could try cleaning the coils of the outdoor condensing unit.  If the heatpump is making noises shut it off and call the experts as this needs more of an experienced technician, it could be that the motor’s bearings need to be replaced.  But check things like the cover panels haven’t come loose and the filters are clear. Check the unit for anything that may have just come loose.

Although heatpumps aren’t too complicated it is best to call an expert to help with any problems.  Especially if it is within warranty as opening up panels and fiddling around with things can negate warranties.  If you do want to check something insure the unit is powered off first and start with the simple things like checking the unit is secure, the filters are clean and clear and there is nothing obvious.

We at kiwiheatpumps know heatpumps, obviously. We are fully qualified and experienced, and along with Fujitsu we also know Hitachi.  Call us today and see how we can help you.  You may even only need to check our myths and tips page or our FAQ’s page, or we can answer your questions over the phone. Otherwise we will come up and see what’s up.

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The Benefits Of Hitachi Heat Pumps

When selecting a heat pump, another choice you have is the Hitachi range. Hitachi offer a range of heat pumps to suit all requirements and are a quite, efficient and cost effective choice for home heating.

Benefits and attributes of Hitachi heat pumps:

  • Designed to be extremely quiet, both indoors and outdoors
  • Clean air technology filters contaminants providing relief to allergy sufferers.
  • High efficiency models (all are ENERGY STAR® qualifiers).
  • The system provides personal room comfort control using a remote to modify room temperature, fan speed and the operating mode.
  • Cost effective due to ease of installation and servicing.
  • 6 Year Warranty for added peace of mind.

See the table below for detailed information on Hitachi RAS heat pumps:

RAS-25YHA4 RAS50-60
Model: Indoor Unit  RAS-25YHA4
Cooling Capacity (kW) 2.5 3.5 5.0 6.0 7.0 8.0
Range (kW) 1.0 ~ 3.2 1.1 ~ 4.2 0.9 ~ 5.8 0.9 ~ 6.8 1.5 ~ 8.3 1.5 ~ 8.5
Heating Capacity (kW) 3.2 4.5 6.1 7.0 8.3 9.0
Range (kW) 1.0 ~ 4.2 1.1 ~ 5.6 0.9 ~ 6.8 0.9 ~ 7.5 1.5 ~ 9.7 1.5 ~ 9.7
Dehumidifying Capacity (l/h) 1.4 1.6 2.8 2.8 4.8 4.8
Power Input kW (Cooling) 0.55 0.91 1.48 1.80 2.05 2.45
Power Input kW (Heating) 0.68 1.06 1.66 1.99 2.36 2.75
EER Cooling / COP Heating 4.55 / 4.71 3.85 / 4.25 3.38 / 3.67 3.33 / 3.52 3.41 / 3.52 3.27 / 3.27
Star Rating Cool / Heat 4 3 2.3.1 2.3 2.3 2
ENERGY STAR®  Yes Yes Yes No Yes Yes
Dimensions & weights
Dimensions IU (H x W x D mm) 280 / 780 / 218 280 / 780 / 218 295 / 1030 / 207 295 / 1030 / 207 333 / 1150 / 245 333 / 1150 / 245
Weight IU (kg) 7.5 7.5 11 11 16 16
Dimensions OU (H x W x D mm) 548 / 750 / 288 548 / 750 / 288 650 / 850 / 298 650 / 850 / 298 800 / 850 / 298 800 / 850 / 298
Weight OU (kg) 33 38 45 50 52 52
Noise levels
Sound Pressure Level IU dB(A)**

(Hi / Med / Low / Sleep)

39 / 32 / 28 / 22 41 / 35 / 28 / 22 47 / 39 / 28 / 24 49 / 41 / 32 / 29 47 / 42 / 33 / 30 49 / 45 / 40 / 36
Sound Pressure Level OU (dB) Cool / Heat 47 / 48 47 / 48 50 / 52 50 / 51 51 / 53 55 / 55
Nano Titanium Air Purifying Filter Yes Yes Yes Yes Yes Yes
Nano Titanium Pre-Filter Yes Yes Yes Yes Yes Yes
Anti Corrosion Fin (O/U Coil) Transparent Transparent Green Green Green Green
Indoor Fan – Anti-Bacterial Coating Yes Yes Yes Yes Yes Yes
Multi-Directional Air Flow Yes Yes
Weekly Timer SPX-WKTI Optional Optional Optional Optional Optional Optional

For our range of Hitachi heat pumps, visit our Hitach heat pumps page.

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Do I Need A Floor, High Wall Or Ducted Heat Pump?

When selecting a heat pump, you have the choice of selecting a few types of heat pump. High wall, floor and ducted/ceiling heat pumps all have their benefits depending on the installation and what you need from it.

High wall heat pumps are the most common and also tend to be the cheapest. They are also the simplest to install and do not take up floor space, giving you more room for furniture and general space. They also have a range of functions such as timers, purifying air filters and directional louvers.

Floor console heat pumps tend to be more expensive than high wall units. They operate in a very similar manner as the high wall units, generally sharing the same options and functions. Floor console units are perfect for homes that cannot accommodate a high wall, such as homes with tall windows. They are also perfect for replacing fixed gas heaters and night stove heaters, eliminating the need to plaster and paint the wall behind the old heater.

Ducted heat pumps, also known as “central heating” or “ducted air con” are a good option for multiple rooms. The unit is installed above the ceiling or below the floor, and several outlets are installed to several rooms in the house. Temperature, modes and timers can be set with a controller.

If you are not sure which system will be best for you home, talk to us today and we can help you select the system you need depending on your requirements.


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