Technical Fiat ducato carioca ci 2003 fridge problem

[Buggy bandit]

Hi guys I've got a fiat ducato carioca ci 2003 model 6 birth I'm new to this not had it long now got a problem with the fridge it will work on gas but not work on ecu and not battery while driving the light on the front not come on and is not getting cold but its working fine on gas I've checked the fuse and that's OK any one know what to check next any help much appreciated thank you

 

[jackwhoo]

It's 20 plus years old you are lucky it works at all.
They didn't tend to work off battery power at that age. Mains hook up power or gas when stationary . Keep door closed when travelling to stop inside warming up until next stationary.

 

[Buggy bandit]

It's 20 plus years old you are lucky it works at all.
They didn't tend to work off battery power at that age. Mains hook up power or gas when stationary . Keep door closed when travelling to stop inside warming up until next stationary.

I have the option for it work off battery while driving and yes the door is closed and parked for 12 plus hours but no joy

 

[jackwhoo]

That was advanced for 2003

You said it works on gas if that's not enough you are probably looking at a replacement fridge unit- sit down before looking at prices

Is it meant to run off hook up power too?
If yes have you tried hook up 240 volts?

 

[Buggy bandit]

It's 20 plus years old you are lucky it works at all.
They didn't tend to work off battery power at that age. Mains hook up power or gas when stationary . Keep door closed when travelling to stop inside warming up until next stationary.

I have the option for it work off battery while driving and yes the door is closed and parked for 12 plus hours but no

That was advanced for 2003

You said it works on gas if that's not enough you are probably looking at a replacement fridge unit- sit down before looking at prices

Is it meant to run off hook up power too?
If yes have you tried hook up 240 volts?

It runs on hook up 240vup or can run on battery while driving and gas but it not work on hook up or battery

 

[Communicator]

There will be separate heating elements for 12V operation, and 240V EHU (electical hook up).
It is possible that the 240V element has failed.
The 12V element being descibed as suitable for battery operation is misleading. You really need the alternator to be supplying the power and the battery is also connected to the alternator, as is normal.
To ensure that power is only taken when the alternator is charging the battery, a signal known as D+, is taken from the alternator field circuit, which only becomes live at 12V when the alternator is working, normally this is when the engine is running.
The D+ signal is used to operate a relay (fridge relay), which connects the fridge 12V element to usually, the starter battery.
On an x244 model Ducato it was common practice for the motorhome converter to fit two relays under the plastic hood at the centre rear of the engine compartment, the other relay would be the "split charge relay" which connects the habitation battery in parallel so that it can be recharged from the alternator. Both the split charge, and fridge relays should be connected to the starter battery via fuses, with the split sharge connection also having a fuse close to the habitation battery.

The under bonnet fuse and relay connections can suffer from corrosion, and it is not unknown for the connections to fail. Also the D+ connection to the relays may also be fused. If this fuse is faulty, there will be no 12V fridge operation, or recharging of the habitation battery while driving.

The fridge 12V element will draw about 13A, and can cause heating and hence further degredation of badly made connections. Look for discolouation of cables at connecting points.

 

[Buggy bandit]

There will be separate heating elements for 12V operation, and 240V EHU (electical hook up).
It is possible that the 240V element has failed.
The 12V element being descibed as suitable for battery operation is misleading. You really need the alternator to be supplying the power and the battery is also connected to the alternator, as is normal.
To ensure that power is only taken when the alternator is charging the battery, a signal known as D+, is taken from the alternator field circuit, which only becomes live at 12V when the alternator is working, normally this is when the engine is running.
The D+ signal is used to operate a relay (fridge relay), which connects the fridge 12V element to usually, the starter battery.
On an x244 model Ducato it was common practice for the motorhome converter to fit two relays under the plastic hood at the centre rear of the engine compartment, the other relay would be the "split charge relay" which connects the habitation battery in parallel so that it can be recharged from the alternator. Both the split charge, and fridge relays should be connected to the starter battery via fuses, with the split sharge connection also having a fuse close to the habitation battery.

The under bonnet fuse and relay connections can suffer from corrosion, and it is not unknown for the connections to fail. Also the D+ connection to the relays may also be fused. If this fuse is faulty, there will be no 12V fridge operation, or recharging of the habitation battery while driving.

The fridge 12V element will draw about 13A, and can cause heating and hence further degredation of badly made connections. Look for discolouation of cables at connecting points.

Thank you very well explained well have alook tomorrow