Frequently Asked Questions

Which adaptor/inverter suits my fridge?

Model/Adaptor EPS-816A EPS-817A EPS-100W MPS-50
  12V Output 60 Watts 12V Output 70 Watts 24V Output 100 Watts 24V Output 150 Watts
Calypso, High Top, Double Top Yes Yes No No
Classic 7, 18, 32, TF14 No Yes No No
CCF 18, 35, 40, 45 No No Yes Yes
CF 25, 35, 40 & CF50 No No Yes Yes
CF80 & CF110 No No No Yes
FF30, 40 No No Yes Yes
FF70, 90 No No Yes Yes
HDC No No No Yes

The EPS-100W and the MPS-50 have a 24 volt output.
They cannot be used on any 12 volt appliance as it will cause damage to the adaptor or the appliance or both.

The MPS-50 is 150 Watts and for the BD-50F compressor used in e.g. the FF70, FF90 and HDC range. The MPS-50 and the EPS-100W have Automatic Battery to Mains changeover for permanent installations and accepts both 110 and 240 volts.


  • Millennium Cooler
  • High Top
  • Calypso
  • Double Top
  • Classic 7
  • Classic 18
  • Classic 32
  • Freshbag 14ltr
  • Or any other Thermoelectric product

The compressor fridges (CCF, CF, FF, RD, RPD, RSD, MDC, HDC) are able to run off the EPS100W or the MPS50 because the compressors in them (Danfoss BD35F and BD50F) are 12/24 V Compressors (i.e. they will run off 12V or 24V).

Can I use my WAECO Adaptor on a Generator?

Only if the generator is stable. Our AC Adaptors are state of the art high frequency switch mode invertors and can take reasonable voltage fluctuations between 200 and 250 volts. Because many generators are not well speed regulated, we cannot guarantee them for this purpose. However, most generators also have a 12V output which can run the fridge directly and much more safely, providing a 12V battery is in parallel. This has the advantage of charging the battery and running the fridge. Direct connection without a battery is not recommended, as most generators DC output is not well regulated. This advice applies to all appliances, not just fridges.

What does it mean if the error light is flashing?

If the error light on your fridge flashes once every 5 seconds, it is definitely indicating that you have a voltage drop problem. This means that the wiring in your car may be inadequate to carry the correct amount of volts to the fridge.

To test if this is the problem, plug the fridge into a suitable AC adaptor. If you find that the fridge works, you can eliminate that there is a problem with the fridge and the car wiring should be checked. If the fridge does not work on an AC Adaptor, further investigation is required. Speak to WAECO if this occurs.

We recommend car wiring to be a minimum of 6-8mm cross section wire.

My Fridge attempts to start but will not run

With almost 100% certainty we can say this is caused by your wiring and not the fridge. The automatic low voltage cut out circuit needs to measure the voltage under the load of the motor. It does this every 30 seconds to see if the voltage has increased to a safe level. This test only takes one second and if the voltage is too low it stops immediately. This explains the one second burst from your motor, it is simply testing your wiring.

Voltage measurements at the battery are meaningless. The refrigerator can only read what it is actually receiving after deducting the losses in your wiring socket and plugs. Also, the reading is meaningless unless the fridge is running because voltage drop cannot be see without a load. Voltage drop in car wiring causes 90% of our service calls. If you install decent car cigarette wiring or a dedicated socket for the fridge you will have many years of trouble free operation.

What should I use to charge my Blue Apple from 240V?

Any fully automatic charger can be used on Blue Apple Batteries but we recommend using our fully automatic WAECO MBC600A or 808-012 Chargers.
AC Adaptors should not be used as there is a danger of overcharging and damaging your Blue Apple and your warranty will be void.

What is the Emergency Switch on the CF50?

The emergency switch on the CF50 is a safety device that is unique to WAECO fridges. It is presently only on the CF50 but will be extended to all models in the future. It allows your fridge to run if the electronics fail for any reason. This avoids any food being lost if you are a long way from a service point as the fridge will still run even with an electronic fault.

For normal operation, the emergency switch should always be in the OFF position. When the switch is in the ON position, it will bypass all the electronics and the compressor will run continuously therefore freezing all your food. You can modify the temperature by periodically unplugging the fridge.

Please also be aware that by bypassing the electronics, you will also have no battery protection!!

The bypass switch is a very worthwhile convenience and safety feature but it must be used correctly.

What is the HIGH/LOW switch for? (HIGH/MEDIUM/LOW switch on CF50)

This is your battery saving device to protect your fridge and car battery. Battery protection is built into all of our compressor fridges. The fridge is not allowed to run lower than 10.4 volts because most common lead acid batteries in cars can be seriously damaged or destroyed by allowing them to become completely flat or completely discharge, not to mention the extreme inconvenience caused by not being able to start your car! Also, if the supply voltage from the battery becomes too low, electronics and motors tend to overheat. This occurs with all electronics and all motors no matter who the manufacturer is. And that is why we do not allow this to happen to WAECO products.

Basically, in most situations you should run your fridge on the LOW setting - this will allow your battery to run down to 10.4 volts then the fridge will cut out. On HIGH, the fridge will drain your battery to 11.7 volts then shut off. Therefore your fridge will run for longer on the low setting.

Does your fridge fail to start of stops unexpectedly when running on your vehicle battery? There is almost certainly nothing wrong with it!

If this happens you should be aware that there is almost certainly nothing wrong with the fridge. It is doing exactly what is should do to protect your battery. The problem is almost definitely in your wiring... please read on and we will explain...

*1. The Danfoss compressor and control unit used in all WAECO fridges will run on any voltage from 10.2 to 28 volts, in this respect it is the best unit available.
*2. These units are designed and manufactured to military specifications and have to be remarkably reliable for use all over the world.
*3. The failure rate of this compressor end electronic controller has been the lowest of any mass produced DC fridge ever made by any manufacturer

With all DC refrigerators you must have enough voltage to run them properly, The battery in any vehicle can run your fridge just fine, even a small battery, but your must get all the voltage to the fridge not just some of it.

When running on a 12 volt car battery and with the switch on the fridge set to LOW (meaning lowest cut out battery protection voltage) the controller is very accurately set to cut off the unit to protect your battery if it sees less than 10.2 volts at the fridge. It must be understood that the voltage the fridge sees after it comes through the vehicle wiring and the cigarette socket not the voltage at the battery. You must deduct the voltages losses caused by your vehicle.

We have been receiving feedback from customers that the cigarette lighter in many vehicles, even some late model 4WDs is not adequate to the battery power correctly to the fridge, either the wiring is too thin or the cigarette lighter or accessory socket is dirty or has poor contacts. Both of these will create voltage drop and if it is enough, the computer in the fridge will see it as too low and turn off.

You can prove that there is absolutely no problem with any WAECO fridge by plugging it into an AC adaptor and you will see that it works perfectly, proving that it is in fact perfect. This is because the correct battery voltage is coming directly from the AC adaptor and is not loosing voltage by running through your car wiring or cigarette lighter socket. If the fridge stops after a few minutes and flashes the red low voltage warning light then your wiring is creating at least 2.5 volts loss. Battery voltage normally 12.2 with the engine stopped, less 2.5 volts loss in car wiring leaves only 9.7 at the fridge. So the fridge computer thinks your battery is flat and turns itself off to save it. It's that simple!

The solution is also simple! Replace the two wires from your battery to the cigarette light with thicker wire of at least 6 mm cross section (this does not mean 6mm thick it is just the way wiring is rated. Your auto electrician can sell you the right wire). An even better solution is to wire a special socket in the vehicle directly back to the battery in at least 6mm wire and you will never have to consider this problem again. The other advantage of a direct connection is that you do not need to have the vehicle ignition switch turned on to run the fridge. This is in fact another major cause of low voltage because when you turn the ignition to the accessories position, you can just imagine how many other things in your car are now also turned on and draining power. This also lowers the voltage available to the fridge in just the same way the lights dim in your house when something big starts up like and air conditioner.

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