Truma Combi 4E fault E602 H

Stewart

Have you tried to reset the boiler  by pressing the reset button on the rear of the boiler?

David

Not familiar with that specific fault code, but always worth trying a hard reset on the Truma unit. There seems to be a few variations on the precise location of the reset button but generally it’s a little red button under the plastic cover - Google ‘Truma 4E hard reset’ and you’ll find plenty of videos out there illustrating what to do. If that doesn’t clear the fault, you may have a PCB fault

David, thanks and that sounds like a plan tomorrow.

Bill, again a good suggestion thank you. I do fear a pcb fault ……

I’ll see what Truma come back with

thanks fir your replies 

Very prompt response from Truma this morning;

fault code 602 in indicating an overvoltage to the combi boiler. advise checking 12v power supply then wait 15 minutes until the fault code has gone solid, scroll round to the exclamation mark in the triangle and press twice, this has cleared the fault and all working again thankfully.

If this does not clear the fault, then a hard reset required. 

Hope this assist anyone with this fault in the future. 

I'm sure I've seen something similar on my Truma panel when I've disconnected EHU without turning heat/water settings to off before doing so.....

Switching panel off, clears fault code.

I guess anything that can generate a voltage surge/spike could create the error……vehicle alternator, solar controller or just abruptly shutting off the supply to live circuits. 

A really useful post...

in the last I have found Trumas advice about waiting 15mins and posted on various sites, but users are reluctant to do much other than keep pressing buttons....

some codes can be cleared by just turning the control panel off....press and hold the rotary knob....

some (never yet on either of my latest vans) require using the red button. Not easy with my installation.

some require the 15 min wait...these just need to be recognised, I'm sure codes can easily be found on Trumas website.

It will be 'similar' but there is a specific error code for loss of mains voltage..as you say, this is one of the easily cleared errors....I did it once and cleared straight away, some have had the same error and found it needed a reset.

different electrical set up perhaps, certainly Uk vans have a different set up to German ones.

Had the same issue, I down loaded the booklet from Truma which sorted my fault out, if you phone they are very helpful.