@BLUETTI @BLUETTI_CARE I have the same issue with the fan on the AC180 (Australian version) staying on indefinitely with a DC draw of 65 to 95 watts. Is it possible to receive a pushed update please to fix this issue?
Serial Number and versions as per attached images:
@lavash_bluetti @Erebus Recorded in the system and an update is expected to be pushed out within 24 hours.
@BLUETTI The update has arrived and was installed successfully. I will see if the fan situation has improved on the AC180’s next use and advise accordingly. Thank you again for assisting with this firmware solution.
Hello. Also the update is available and installed successfully. Later I will test and write. Thank you.
@BLUETTI_CARE @BLUETTI Unfortunately the update has made no difference on my AC180. When there is a load from the 12v DC cig outlet, the fan comes on at what appears to be full strength, and rather than cycling on and off like my other Bluetti Power Stations do, this one remains on indefinitely until the draw is terminated. It’s as if the fan has not been programmed to turn off after the system has been cooled by it. Is it possible that a firmware update can be provided to address this, or would it be a hardware or thermostat fault?
Additionally, how long can I expect the fans to last with around 8 hours constant full speed operation per day? I would imagine they would probably burn out after a few days?
Hi @Erebus, The conditions for the fan to turn on in the AC180 are as follows:
When the charging or discharging power reaches a certain value, the fan will start.
When the internal temperature of the machine reaches a certain level, the fan will also start. Once the internal temperature drops, the fan will stop.
Additionally, every time you turn on the machine, the fan will run for a short period for self-check purposes.
We noticed that your DC load is quite large, with a higher output power. Since the temperature of the DC module can rise quickly, it is normal for the fan to activate to dissipate heat.
The fan’s role is to provide cooling and will not damage the machine, so please rest assured.
@BLUETTI_CARE thank you. I have solved the issue by using the AC output instead. Even though the wattage draw is nearly double, the fan cycles as expected and is barely audible, so the issue is definitely with the DC output which for some reason makes the fan run at full speed indefinitely. Hopefully this way the fan will not burn out after a few days.
Hi @Erebus, Thank you for getting back to us so quickly.
The AC load capacity is much higher than that of DC. While this load power is too high for DC, it is not significant for AC.
We recommend using low-power devices for DC loads and high-power devices for AC loads. Your solution is correct.
The problem remained when using the DC charging input (7909). The fan turns on and does not turn off. It looks like this. When the temperature rises, the fan turns on, this is confirmed by the warm air flow from the fan at the outlet immediately after switching on. But the fan continues to work constantly even when the air has become completely cold. An obvious error in the program. This is confirmed by the fact that if at this moment the station charging is disconnected via DC (7909), the fan turns off and if you immediately connect the station charging via DC (7909), the fan does not turn on immediately and it will turn on only when the temperature rises, but it will not turn off when the temperature inside decreases. The problem is in turning off the fan when the temperature drops.
This may or may not solve your fan noise problem, but the fan inlets need vacuuming at times. Mine lets me know by running at high speed. I vacuum it and then the fan runs normally.
Thanks, but there is clearly a problem in the fan control program when charging via input 7909 (direct current). They simply forgot to describe the shutdown conditions when the temperature drops when charging via this port. Programmers should check this code branch and fix it.
@BLUETTI_CARE I described above how the problem manifests itself when charging the station via a DC connector. Can you help?
Hi @lavash_bluetti, We believe that the fan switch ON/OFF is related to both internal temperature and input/output power. When the internal temperature or power reaches a certain threshold, the fan will automatically turn on.
The fan stops in a similar manner—it won’t immediately shut off just because the temperature decreases, as it is also influenced by the power load.
We’ve already optimized this issue in the new DSP firmware.
Hi @lavash_bluetti, It is the DSP v2078.06 in EU, and DSP v2077.06 in US.
I think your DSP is already the latest one, is that so?
Hi @BLUETTI_CARE . I have several AC180. All EU. On one of them you gave the opportunity to install v2078.07 (and on this station BMS v1033.12)
On the other two there are DSP v2078.06 and BMS v1052.02.
ARM v2074.07 - on all stations.
And it was on the stations with DSP v2078.06 that I noticed another problem. If these stations are connected to a wall outlet and the station is turned off (by pressing and holding the button on the station), after a while the stations spontaneously turn on. At the same time, the electricity in the power grid was not turned off or turned on. But the frequency in the network can be 49.9 Hz and increased voltage up to 237-244 volts.
Is it possible to somehow solve the issue of replacing the software on two stations so that they do not turn on on their own (if the voltage in the outlet does not disappear for a while)?
At a load of 60 W, the fan stops for 1 hour 20 minutes 2.06 - 6.09. Then it turns on and starts roaring like a vacuum cleaner 6.09-7.38 the only way to stop it is to reduce consumption to 30 W. If you increase consumption to 120 W, the fan switches to normal silet mode. Please help https://www.youtube.com/watch?v=8eAO6moroj8&t=76s&ab_channel=%D0%93%D0%B5%D0%BD%D0%B0%D0%A1
Hi @lavash_bluetti, When the device is powered off, it can still be activated by both AC and PV charging, which is normal behavior. If you want to keep it plugged into the wall outlet without being activated, you can use a smart switch and turn it off when not in use.
Will you answer my question? Why does the station start humming like a vacuum cleaner after a certain time with a load of 60 W?
