Popular Post tweetyduck Posted January 3, 2016 Popular Post Share Posted January 3, 2016 I googled for hours to try and fix this and finally I found something useful. To reset a locked out Eberspacher D5LC (may work on other models) all you need to do I short out two wires. You do not need to buy a 701 or 801 controller or take it to a dealer. 25 1688 50 00 / 12V and 25 1689 50 00 / 24V in versions R0,R1,R2,R3,R4 are confirmed to work. Although you need to short the wires for longer time on the R3 and R4 models of ECU. Up to 5 seconds for the R3,R4 and up to 2 seconds for the R0,R1,R2. To do this try to start the unit as normal. This will not work as its locked out however you will get an illuminated Green LED in the middle of the dial. With the Green LED illuminated short out the two pins as per the diagram below. Do not remove the wires just short them out where they are. The heater should immediately start up if the duration of short is long enough. Mine took 3 seconds maybe as its an R4 Remove the short as soon as the heater starts up The green light may blink the last error code whilst the heater is running Let the heater run for a good few minutes and then allow it to shut down as normal by turning the control knob to off position Allow it to fully cool down and shutdown Power cycle the heater and then attempt a fresh restart. The green light should be steady with no blink codes and it should now be unlocked. The symptoms of a lockout for me was upon turning on the heater the fan didn't blow and the unit did not start. The green LED was steady indicating no fault codes and no matter what I did it would not go into start-up procedure. This seems typical of a lock-out. All I did was have a low fuel tank and this locked it out. 15 Quote Link to comment Share on other sites More sharing options...
Arjan Posted January 3, 2016 Share Posted January 3, 2016 Thank you - goes in the little red book.... Quote Link to comment Share on other sites More sharing options...
supaimpy Posted January 4, 2016 Share Posted January 4, 2016 Before doing this please ensure there are no current fault conditions on the heater ., the LOCKOUT is a safety function. This should not be attempted on an Airtronic heater as there is a real risk of ECU damage. Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted January 4, 2016 Author Share Posted January 4, 2016 Before doing this please ensure there are no current fault conditions on the heater ., the LOCKOUT is a safety function. This should not be attempted on an Airtronic heater as there is a real risk of ECU damage. As far as I know if you cancel the lockout on an Airtronic the unit will only start once its done another full check of itself, if it finds a fault it will not start up even after cancellation. However yes if you don't know the reason for lockout then its good practice to find the fault first. However I'd hardly say low fuel was reason enough for a permanent lockout. If I'd been on the road I'd not have been able to unlock the unit (as the detail on process isn't readily available) and may very well have frozen to death ! Quote Link to comment Share on other sites More sharing options...
supaimpy Posted January 4, 2016 Share Posted January 4, 2016 The low fuel cut out is actually a failed start, its to prevent the heater continually trying to start. Bringing in the glow pin or plug continually can cause damage to the glow pin or plug. It also prevents the battery being flattened during this high current draw initial start up phase. It would be a safety time exceeded fault- to avoid flattening a potentially vehicle immobilizing battery. Quote Link to comment Share on other sites More sharing options...
connorstewart Posted May 2, 2016 Share Posted May 2, 2016 Hi thanks for the help. Just purchesed a 98 pulse ambulance. I have tried the above with no luck with the d5 in my pulse ambulance, my heater starts up and will run continuously when the dial is turned to the blue spot, however when turned to the red section of the dial the heater blows for 20 seconds and then trips out, ie causes the switch to jump to the out / off position. The heater was tried to be started more times than 4 so has probably been locked out and this may have been due to low fuel as only had 1/8 th of a tank but upon refilling and trying the above mentioned trick no luck! Any suggestions would be great! Cheers Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted May 2, 2016 Author Share Posted May 2, 2016 buy a 801 controller and read the codes. It might need to go into the shop or some bits might need replacing. did the light in the middle of the dial flash the codes when you re-set it. It should have but it only flashes one code so if there are more you need the 801 to read them all. Quote Link to comment Share on other sites More sharing options...
supaimpy Posted May 2, 2016 Share Posted May 2, 2016 If your near the south coast - Hants or Dorset I could put the diagnostics on it and tell you what the fault is or alternatively point you in the direction of a man that can elsewhere in UK Quote Link to comment Share on other sites More sharing options...
connorstewart Posted May 4, 2016 Share Posted May 4, 2016 Thanks guys! No blink codes at all, i hear a change in fan speed when i reset but thats all. I am near Belfast so not to close to Hants or Dorset, but if you know of anyone that could help in N.Ireland that would be great thanks! If not will have to be a 801 I guess. Quote Link to comment Share on other sites More sharing options...
connorstewart Posted September 21, 2016 Share Posted September 21, 2016 Thought i would let anyone with the same problem know what the problem was, I purchased a 801 controller and it returned no errors, so i tried bypassing the circuit breaker with a fussed wire (30 amp) and hey presto the heater is working :). so only problem now is finding a similar circuit breaker because they are going for 150 quid each online :s Should be something similar about though. Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted September 21, 2016 Author Share Posted September 21, 2016 I just sold all of mine including the panel for £100. I would have nicked the fuse for you before selling it if i'd have known a few days ago. Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted September 21, 2016 Author Share Posted September 21, 2016 if you want to get one. this is the place. http://www.e-t-a.co.uk/products/circuit_protection_devices/thermal_overcurrent_circuit_breakers/ Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted September 21, 2016 Author Share Posted September 21, 2016 Ebay evan have some. http://www.ebay.co.uk/itm/like/281821821251?lpid=122&chn=ps&googleloc=1007064&poi=&campaignid=620865095&device=c&adgroupid=27378760866&rlsatarget=pla-181484320386&adtype=pla&crdt=0 Quote Link to comment Share on other sites More sharing options...
AliDave Posted January 21, 2019 Share Posted January 21, 2019 I have had a lock out on the D5LC on my boat and used this forum to reset the 12v R4 controller. Happy days. All working now. Many many thanks. Quote Link to comment Share on other sites More sharing options...
Onar Posted March 20, 2019 Share Posted March 20, 2019 On 1/21/2019 at 11:54 AM, AliDave said: I have had a lock out on the D5LC on my boat and used this forum to reset the 12v R4 controller. Happy days. All working now. Many many thanks. AliDave, I have a lockout with my D5LC, 12v R4, on my boat. Please can you tell me how you managed to unlock it on your boat? Quote Link to comment Share on other sites More sharing options...
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