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Home / Diesel Generator Sales / Diesel Generator Troubleshooting Guide

Diesel Generator Troubleshooting Guide

Many UK businesses right across the country have taken the smart step of investing in a standby generator. Having a source of backup power is a crucial step in preventing your business operations from coming to a standstill should your local area be subjected to a blackout.

Standby generators and generator power solutions have seen a rise in popularity in recent years, and it is not difficult to see why. Once you’ve decided how to choose the best diesel generator for your needs, you’ll need to think about how best to service it, and how to troubleshoot.

Whilst diesel generators are generally extremely durable and dependable, there are inevitably certain issues and problems you’ll want to keep an eye out for. Here at Vital Power our team of expert engineers can help with any repairs, and can provide advice on how to keep your generator in top working condition.

Read more about some of the most common diesel generator issues…

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Diesel Generator Troubleshooting Guide - Vital Power

Our 4 Step Process

Step 1

Contact Us

Looking for a generator for your site? Contact us via the contact form below or give us a call to get started with your critical power solution

Step 2

Tell us your requirements

Our team will discuss your requirements with you, explaining the options available to you.

Step 3

Site survey

One of our highly skilled generator engineers will visit your site to map out to take note of your power requirements, where the generator will be installed, answering any questions you may have

Step 4

Delivery, installation & commissioning

Once the order has been placed, our team will then install your generator on site. We also carry out rigorous commissioning processes to ensure that your equipment is ready to support your site.

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The Common Diesel Generator Issues You Need To Know About

Dead Generator Battery

Of course, you invest in a diesel generator so you have a reliable source of power when there’s an outage. However, to make sure it’s always ready to go when you need it, you’ll need to maintain your generator’s battery.

Because the generator can stand idle for prolonged periods of time, the battery can often drain unless placed on a trickle charger. However, keeping your battery ready to go is an easy, quick fix that you can add to your generator maintenance routine.

Studies have shown that in order to keep your generator in perfect working order, batteries should be replaced every three years. Another way in which to prolong their life is to get them serviced on a regular basis.

Generator running out of fuel

A diesel generator being out of fuel is one of the most common problems owners run into. For this reason, make sure the generator fuel level is the first thing you check if your generator won’t start.

For the most part, fuel leaks relate to human error or a fuel level gauge error. Sometimes, the level gauges may not be working properly and may get stuck in position, showing that there is still plenty of fuel when in fact it is almost empty.

To avoid diesel fuel shortages, Vital Power offers regular refuelling and maintenance services for businesses.

Clogged generator filtration system

Within all modern, state-of-the-art diesel generators there will be a built-in air-filtration system, designed to make sure the carburettor receives the right level of oxygen to mix with the fuel. One of the most important generator parts that make up the internal combustion engine is the filtration system. This is a series of pipes which is designed to allow sufficient air to reach the engine.

Depending on the area that you have installed your standby generator, it is possible that debris and dirt can infiltrate these pipes. In some instances, this can lead to the mechanisms being shattered by things like rocks or stones moving at extremely fast speeds.

To avoid clogs or damage from debris, make sure you or a specialist like one of the Vital Power team regularly cleans out the generator filtration system and conducts fuel tank cleaning. Doing a manual inspection of your backup generator on a consistent basis can help you to prevent any lasting damage.

Generator leaks

As mentioned above, the commercial power systems and standby power sources that are being operated frequently are typically forced to take on heavy workloads. To ensure a maintainable level of output, make sure you conduct load bank testing for your generator system.

Though they’re extremely reliable, generators can suffer from oil, fuel, or coolant leaks. If you do find a leak, the best thing to do is call a qualified technician to come and patch or replace the necessary components.

However, your generator can sometimes think there is a leak when in fact there isn’t one. You will hear this referred to as ‘wet stacking’; it is the accumulation of unburned fuel, condensed water, carbon particles and acids in the exhaust system.

Regular scheduled services and manual generator checks can help make sure any leaks are picked up on before they cause major damage and lead to more expensive repairs.

Generator automatic controls switched off

Every generator has a control panel that allows you to manage the generators’ settings. This panel also displays important engine and alternator information. Sometimes, your generator won’t start simply because its auto controls have been left in the ‘off’ position after a routine test or inspection.

According to our engineers, the majority of the service calls for control panel problems are caused by operators failing to turn on the automatic controls. So, if you can’t turn your generator on, make sure to check the auto controls first!

Generator block heater is broken

Emergency power generators put in a lot of work, even when they’re sitting seemingly idle. The role of a block heater is to heat the coolant so that it circulates the engine block. The generator block heater needs to keep the engine block warm to prevent thickening of oil. Eventually, all block heaters will fail because they run all day, every day – so this is something you should be aware of.

Contrary to misconceptions, block heaters are essential, even in warm climates. In general, they reduce wear and tear by maintaining more consistent temperatures throughout the cooling system. Keep an eye on your generator block heater, and replace it when needed to avoid generator failure.

Got a question? We’re always happy to help.

Contact us to learn more about our range of generator services across the UK

What Our Customers Are Saying

Reviews summary

"I wanted to say a big thank you for the way my generator was installed by one of your engineers. It was done extremely professional and quickly. The engineer projected a tremendous sense of enthusiasm and confidence – and his small-talk is also most interesting to hear. I was left in awe of his complete understanding of the installation requirements. He even management to iron out a difference on the auto start that the manufacturer did not tell him about. A very clean and good working in all respects, he is a tribute to your company"

5 Stars
Site Manager

"Your engineer was absolutely brilliant - he got the generator working again really quickly and so I have power; he was also really professional and a real asset to your company. I would recommend your company in a heartbeat. Thank you all for helping me out in a time of need. I'm very grateful."

5 Stars
Site Manager

"I would like to say that your company is very customer driven. To offer a service outside your normal scope to fulfil a market need is exceptional and professional. When our new generator requires a service, I will contact Vital Power again"

5 Stars
Maintenance Manager

"Everyone at Vital Power is very professional. I was really impressed with Managing Director, he worked very hard to make sure we were happy and got everything right. The engineers were superb and extremely professional when they came to inspect our cabling requirements. We couldn't be happier with the result and I couldn't fault the work at all. We're really pleased."

5 Stars
Site Manager (BituChem)

"Very happy with the engineer that was on site yesterday to get involved with the power switchover. All went successfully and brilliant result! Thank you."

5 Stars
Maintenance Manager

"Credit to Warren, he's been absolutely unbelievable. To get the generator working in the time that he has is amazing. Great work and thanks again."

5 Stars
Contracts Manager

"I have just received a phone call from the client in regards to the engineer’s visit yesterday. They were very impressed by him, so much so they are thinking of switching all other generators they have over to you. It’s so good to get positive feedback, thanks again for your help"

5 Stars
Contracts Manager

"Your engineers are great, they are keen to help and work proactively to get things done. We were also seriously impressed with Phill Walters getting an emergency hire set to us in just 2-hours from the initial phone call!"

5 Stars
Engineering Manager
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