The triangle light is lit (red) what does it mean?

Green light means that freezer is connected to the mains/electric

Red means that your freezer has not reached minimum working freezing temperature, this is not good news, something may be wrong with your freezer, get it checked by a competent person.
yellow light means that you have switched the fast freeze button on. This yellow switch allows the freezer to run continuously so that the frozen food you brought home from shopping can freeze up quicker. You must not leave this light on for more than 3 hours. It will cause you to waste a lot of electric and will place a lot of stress on the working component in the fridge.

Red light lit on freezer means that is not reaches operating temperature.

Most often the old freezer has three indicator lights.
- Green light : that it is brought to a power source and turned on - Red light : means that the temperature is above -18 degrees
- orange light : pressing the so-called SUPER-switch which means that the compressor is running continuously. The SUPER-button switch on a few hours before you begin deep-freeze foods. Freezing time depending on foods quantity (kg). With old freezer must be careful to turn off the switch S (orange light) when the red light goes out or when foods are frozen, otherwise after a few days may burn out the compressor. You should be following the instructions from user manual.
In new freezer managed by the electronics, this function has a predetermined maximum duration, in order to protect the compressor, and can have different marketing names like "shopping".....

Dado

Under normal operating conditions, the internal
temperature of the freezer will ensure the longterm
conservation of the stored food.
When such temperature rises above a certain
level (-12 °C), the appliance will trigger an
acoustic and light alarm. The light alarm is a
blink red light (Red Alarm Indicator Light), while
the acoustic alarm is an intermittent sound.
You can stop the acoustic alarm by pressing
the Acoustic Signal Stop Switch once.
When switching on the freezer for the first
time, the Red Alarm Indicator Light will
blink until the internal temperature has reached
a level required for the safe conservation of frozen
food.

Dado

It's a temperature warning that the freezer is no longer at the correct temperature. Check all is clean and working, door seal intact etc. If short of gas, probably time to get a new one!!! Bet it won't last 18 years this time though!

defrost cycle is innactive, will ice up shortly and may not turn compressor off, defrost the unit totally(Turn off for 2 days with door open) and remove all water from the unit once done. Restart unit and should work normal for a week or so, ie...defrost cycle...get back to me if this is the case and will sort it from there, [email protected] Russ

you need to clean the condensor coils with a brush or compressed air

its too warm,could be iced up or worse.

This means the sensor has determined that the temperature is rising. This can happen if the door was left open or an unusual amount of warm food was put into it. If this is not the case you may have a cooling problem. If you can put a thermometer in there and check the temperature, working properly the freezer should be around 0 F. If you have trouble please send the model number from the tag on the freezer. That will help with trouble shooting.

Thanks

two reds and green are the auto max freeze on indecators the reds go off one at a time when unit drops to safe temp mode.also means unit needs defrosting manually when too much ice is present.

Is your circulating fan working?
Sometimes they stick and need a shot of WD 40 and then work
it back and forth a little until it wants to take off again. Keep me informed
and PLEASE give a Thumbs Up for the effort. The Raz Shack