Fujitsu Serial Communication Error

[Myra Krallman]

Onthe troubleshooting guide it states error e01 (communication / serial error) between indoor and outdoor unit. Called the bloke who installed it, semi retired and says he cant be bothered isolating issue and told me to buy a unit or call another air con person.

Edit: It's important to note the reason for a board to fail, it might have been the outside fan motor failing or shorting. The high voltage motor supply can sometimes be located right next to the low voltage stuff on the PCB. It could have also been something such as an insect or electrical surge. You don't want to replace the board only to have it fail the moment power is restored. Please be sure that you do not attempt any repairs if you are not confident. Seek assistance from a professional!

Hello everyone,

I have just build a NAS with OMV. I am using a Fujitsu-Siemens D2516 C11 raid controller card in one of the pcie slots and have a raid 5 configured. Now everything seemed to work perfectly fine first. In OMV the raid 5 volume shows up as a single drive and I have successfully created a filesystem on it and even a shared folder. But every few minutes when OMV is trying to read or write to or from the raid volume it throws a communication error message. Clicking the 'Show Details' button just opens a text box that contains 'communication error' and nothing else. When I try to copy a large file to the raid volume it starts out very good, but at one point it just stops dead in its tracks and wont continue until it throws a random error message.

So I guess there is some sort of problem with OMV not properly recognizing the raid controller. Is there any way I can get this to work or would I need to buy a different raid controller or hba or even just use unraid or some other os?

Nope, not an OMV problem, TBH using a raid controller as a raid controller is not a good idea in Linux, the card needs to be flashed to IT mode HBA (host bus adaptor) so that you can set up your raid using OMV (mdadm software raid) this allows you to monitor each individual drive.

Using a raid card this way you have no way of monitoring the health/state of each drive attached to the card.

Eventually, your Fujitsu air conditioner may break down and needs repairs. Unfortunately, the moment your AC fails is usually when you need it most, which is why you should have a trusted local Fujitsu air conditioning service and repair expert on speed dial.

There are a range of problems that can occur with a Fujitsu split system or central air conditioning system. You may not be able to carry out all Fujitsu air conditioning repairs yourself, but you can start by following this handy troubleshooting manual.

Most Fujitsu AC problems arise due to the lack of maintenance, or poor quality of service and installation. Both ducted and split system inverter Fujitsu air conditioners can also develop problems towards the end of their lifespan.

Dirty filters are a common cause of cooling problems for Fujitsu air conditioners. The accumulation of dirt, debris, hair, and other indoor pollutants makes it very difficult for cold air to pass through. It is recommended that the air filters be cleaned at least every 400 hours of operation, subject to the frequency of use.

If the compressor is humming and kick-starting the fan does not work, then it may be a broken fan motor. This problem usually occurs in poorly maintained units or in a very dusty environment. Replacement is the only solution to a bad fan motor.

If your air conditioner leaks or drips water, it is probably due to the disconnection of a tube or a water blockage in the unit. If your Fujitsu air conditioner leaks water from the inside unit, it may be caused by a clogged condensate drain line. This is most common in Fujitsu split systems.

Remember that there is an evaporator coil inside your AC unit. This causes condensation and produces moisture. This moisture then drips down to a drain pan and into a condensate drain line outside the room.

If the condensate drain line is clogged with dirt or debris, you must unclog it with a wet/dry vac, or have a professional bring a special vacuum to remove the blockage. The problem may also be caused by a damaged or rusty drain pan, a broken condensate pump, or low refrigerant levels. For these cases, replacement of the parts and/or refrigerant will be required.

Among these are clogged air filters, frozen evaporator coils, faulty electrical relay switches, or a bad thermostat. It is important to identify which among these are causing the problem and determine the troubleshooting method from there. If it is due to faulty electrical relay switches, then the best way forward is to call a professional Fujitsu AC technician to conduct the repairs.

The type of sound the Fujitsu AC unit makes will hint at which component is faulty. Screeching sounds are caused by fan motor issues. Rattling noises may be due to broken motors, misaligned fans, loose panels, or debris.

A broken compressor motor inside the condenser system, humming noises may be caused by a defective contactor relay switch, buzzing sounds may indicate unbalanced/loose fan blades. Rattling noises may be caused by debris such as dirt, leaves, or pieces of wood.

A malfunctioning thermostat in a Fujitsu air con unit often causes continuous clicking noises, hissing noises, signal leaks in your air duct system, a faulty expansion valve, or an incompatible air filter. Lastly, bubbling noises are caused by blockages, cracks, or holes within the drainage pipe.

This damages the AC unit by subjecting it to unnecessary wear and tear with repeated cycling, resulting in a higher energy bill. This can be caused by an AC unit that is too large for the room it is in, a refrigerant leak, a compressor failure, frozen evaporator coils, poor thermostat placement, dirty air filters or condenser coils, and electrical problems, among others. While some of these can be fixed with a little DIY, replacing parts, and repairing electrical circuitry are best left to the experts.

What causes Fujitsu air conditioner refrigerant leaks? Poor installation of a central air conditioner can lead to leaky pipework, reducing performance and, in some cases, causing complete failure. This can also occur in Fujitsu split system units.

Refrigerant leaks are almost always caused by improper installation of the AC unit and its internal components or a crack/hole inside the unit. The exact repair process will depend on the cause of the leak as well as its severity. However, patching the crack coil (if the hole is not too large) and replacing the coil are the most straightforward ways of stopping the leak.

First, confirm that your Fujitsu air conditioner has a heat mode, as some assume this feature exists on every AC unit when not all AC units come with it. If there is heat mode, then you might not have placed it on the proper settings to allow for the heat mode function to operate.

First, switch the placement of the batteries, just like you would on a regular television remote. If swapping the battery placement does not work, try replacing the batteries with a new pair. If that still does not work, your AC remote may have a problem. It may not be practical to send the remote for repairs, so consider replacing it outright from Fujitsu.

If the vents of your Fujitsu air conditioner refuse to swing, you are most likely looking at some electrical problems inside the unit. The swing motion of air conditioners is controlled by separate swing motors.

Whenever your Fujitsu AC unit performs an emergency stop, the reason for it will always be stated through an error code. A blinking light typically indicates that there is currently something wrong with your Fujitsu air conditioner.

The only caveat is that the AC unit can only display one problem through the light flashes. This means if your Fujitsu AC unit is experiencing more than one problem, it will only show up after the first error code (represented by light flashes) has been resolved.

There may be instances where you cannot turn on your Fujitsu air conditioner using a remote. This could be due to a faulty or broken remote or dead batteries. Either way, manually turning the AC unit on is relatively straightforward.

The caveat to turning on the AC using this method is that it does not allow you to adjust the temperature settings and, presumably, all other extras/advanced features that you would otherwise be able to set through the remote.

If you have inquiries regarding your Fujitsu air conditioner, you may first contact the supplier or installer where you purchased your unit. If you have questions that they are unable to answer, then you may send an email to Fujitsu Australia at enq...@au.fujitsu.com

Fujitsu General Australia gives all domestic air conditioners sold in Australia a 5-year warranty (full parts and labour). For more information on Fujitsu air conditioner warranty terms and conditions, see the Fujitsu Warranty Card.

Fujitsu air conditioners are best serviced every 12 months on average. However, this could be more frequent depending on how heavy your air conditioner use is, or how much dirt your air conditioner collects from your environment. The best time would be just before the change of season every year.

Fujitsu remains to be a reliable air conditioner brand around the world. The company has decades of technical knowledge and experience in the air conditioning industry. Their AC units have been known to last for a very long time with minimal degradation in performance.

Fujitsu, much like other reputable air conditioner brands, can last an average of 10-15 years, depending on how well-maintained it is, how often it is serviced, and how frequently it is used. In cases where the AC unit is maintained and serviced exceptionally well, it lasts up to 20 years.

Since this remote control unit (a UTB-YUB/GUB/TUB) doesn't have infrared, I couldn't just point an IR blaster at it. After some googling, I found a number of installation manuals and discovered the remote uses some sort of 1-wire (as in an actual single wire, not the protocol invented by Dallas Semiconductors) to do communication.

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