JensH
Senior Member
I posted a short novella on the after-factory Diavia ECU-MAN System a few months ago, having got mine working well.
I have two queries:
Symptoms:
1 My recirculation button flashes permanently (apart from when recirculation is engaged when it is constant as normal) - has been doing this for about 3 weeks. I have web-searched and found Diavia Technical Information Bulletin 26, which has a troubleshooting chart. This says the flashing LED means "Malfunction of the External temperature or Evaporator temperature sensors (disconnected or in short circuit)." I cannot find an obvious connection to an Evaporator sensor on the Diavia set-up and no sensor is listed in the original specification, although it does list an External temperature sensor, which is also available as a part - and I know exactly where this probe is on my car;
2 My gas volume is Kg. 0.350. I have the original Diavia system specification (parts list and notes) which states "The quantity of gas R134a necessary for charging the system is Kg. 0.350 (±0.020)"; Diavia Technical Information Bulletin 5, however, stated the old-refrigerant R12 volume as "Kg. 1.150 (±0.050)". An all-dealer USA MB bulletin, October 1996, recommended the following after R12 to R134a conversion 900g (0.9 Kg), but, of course, that is for factory specification A/C or Climate Control.
3 My compressor appears to have stopped switching on.
So, my questions are:
(1) Does the Diavia ECU-MAN system fitted after-factory, actually have an evaporator temperature sensor and, if so, is it located in roughly the same place as the MB one - on the side of the heater box?
(2) I am using 0.350 Kg as per the specific Diavia instructions, although several people have commented that this is a very low volume. Does anyone with a working Diavia system recommend anything else? Btw, as a late model, my car has only ever been R134a - is is basically the same Diavia system as the W210.
Cheers,
Jens
I have two queries:
Symptoms:
1 My recirculation button flashes permanently (apart from when recirculation is engaged when it is constant as normal) - has been doing this for about 3 weeks. I have web-searched and found Diavia Technical Information Bulletin 26, which has a troubleshooting chart. This says the flashing LED means "Malfunction of the External temperature or Evaporator temperature sensors (disconnected or in short circuit)." I cannot find an obvious connection to an Evaporator sensor on the Diavia set-up and no sensor is listed in the original specification, although it does list an External temperature sensor, which is also available as a part - and I know exactly where this probe is on my car;
2 My gas volume is Kg. 0.350. I have the original Diavia system specification (parts list and notes) which states "The quantity of gas R134a necessary for charging the system is Kg. 0.350 (±0.020)"; Diavia Technical Information Bulletin 5, however, stated the old-refrigerant R12 volume as "Kg. 1.150 (±0.050)". An all-dealer USA MB bulletin, October 1996, recommended the following after R12 to R134a conversion 900g (0.9 Kg), but, of course, that is for factory specification A/C or Climate Control.
3 My compressor appears to have stopped switching on.
So, my questions are:
(1) Does the Diavia ECU-MAN system fitted after-factory, actually have an evaporator temperature sensor and, if so, is it located in roughly the same place as the MB one - on the side of the heater box?
(2) I am using 0.350 Kg as per the specific Diavia instructions, although several people have commented that this is a very low volume. Does anyone with a working Diavia system recommend anything else? Btw, as a late model, my car has only ever been R134a - is is basically the same Diavia system as the W210.
Cheers,
Jens