# IIC-800 line error alarm **URL:** \ **Category:** Questions & Answers\ **Tags:** smart-controller\ **Created:** [October 8, 2024, 2:56pm UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130 "2024-10-08T14:56:39Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Dhein](https://avatars.discourse-cdn.com/v4/letter/d/e8c25b/32.png) [@Dhein](https://community.inkbird.com/u/Dhein)\ **Post date:** [October 8, 2024, 2:56pm UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/1 "2024-10-08T14:56:39Z")
I have been getting line error alarms on my iic 800. I reset it and it works for several hours then fails again. Please help me with a solution. ---
**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\ **Post date:** [October 9, 2024, 9:45am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/2 "2024-10-09T09:45:32Z")
Hello, Perhaps you could reset the IIC-800-WIFI. To reset the IIC-800-WIFI, please unplug the power, press and hold the ‘Power’ button, then plug it back in and release the ‘Power’ button until the device powers on. Will it work? If it does not work, please provide your order information, a picture of the problem, and a link to this post to email [support@inkbird.com](mailto:support@inkbird.com) for after-sales service. Since forum posts are public, these may involve private information, please do not reply here. Thanks. ---
**Author:** ![User\_1700092426576](https://avatars.discourse-cdn.com/v4/letter/u/3d9bf3/32.png) [@User\_1700092426576](https://community.inkbird.com/u/User_1700092426576)\ **Post date:** [January 21, 2025, 4:41am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/3 "2025-01-21T04:41:19Z")
Line error and alarm sounds off no good. ---
**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\ **Post date:** [January 21, 2025, 9:44am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/4 "2025-01-21T09:44:46Z")
Hello, May I know if you tried the reset method I mentioned earlier? If it does not work, please provide your order information, a picture of the problem, and a link to this post to email [support@inkbird.com](mailto:support@inkbird.com) for after-sales service. Since forum posts are public, these may involve private information, please do not reply here. Thanks. ---
**Author:** ![Role](https://avatars.discourse-cdn.com/v4/letter/r/b5ac83/32.png) [@Role](https://community.inkbird.com/u/Role)\ **Post date:** [June 19, 2025, 1:25pm UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/5 "2025-06-19T13:25:23Z")
Hi i also have the same issue time error… after asking fo repair i got answer that the company policy was to not share any data or scematics… as i am a electronic design engineer after i open the unit i imediatly notice a fatal desing error the time keeper ic HT1381 oscilator have no compensation capacitors and the clock is not good and stable so the communication with microcontroller fails i mesure with the scope meter.. after i put 2 8pf capacitors as described in datasheet of the time keeper ic the unit star to work as it should… soo guys the problem is in the design… and the solution is very easy for repair… ---
**Author:** ![vincenzo90](https://avatars.discourse-cdn.com/v4/letter/v/ecccb3/32.png) [@vincenzo90](https://community.inkbird.com/u/vincenzo90)\ **Post date:** [June 20, 2025, 1:33pm UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/6 "2025-06-20T13:33:20Z")
Hi can you show me how. Also, I wanted to ask you if you think the central unit can be powered via 24V - and VAC +. ---
**Author:** ![vincenzo90](https://avatars.discourse-cdn.com/v4/letter/v/ecccb3/32.png) [@vincenzo90](https://community.inkbird.com/u/vincenzo90)\ **Post date:** [June 20, 2025, 1:34pm UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/7 "2025-06-20T13:34:07Z")
@Role Hi can you show me how. Also, I wanted to ask you if you think the central unit can be powered via 24V - and VAC +. ---
**Author:** ![Role](https://avatars.discourse-cdn.com/v4/letter/r/b5ac83/32.png) [@Role](https://community.inkbird.com/u/Role)\ **Post date:** [June 23, 2025, 7:03am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/8 "2025-06-23T07:03:50Z")
![slika](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/3/3b510987906f048aa531db08bd8dd32ff8df7f90.png) ---
**Author:** ![Role](https://avatars.discourse-cdn.com/v4/letter/r/b5ac83/32.png) [@Role](https://community.inkbird.com/u/Role)\ **Post date:** [June 23, 2025, 7:07am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/9 "2025-06-23T07:07:28Z")
> [@vincenzo90](#): > > ou if you think the central Now i do not have a picture i need to open the unit again for take the picture… but is easy like the picture i post show, you need to connect a capacitor on each cristal oscilator pin and ground..I remove the solder mask on pcb and connect the capacitors directtly to the oscilator pins and ground… ---
**Author:** ![Role](https://avatars.discourse-cdn.com/v4/letter/r/b5ac83/32.png) [@Role](https://community.inkbird.com/u/Role)\ **Post date:** [June 23, 2025, 7:08am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/10 "2025-06-23T07:08:12Z")
![16MHZ_Crystal](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/5/51ee0b61fc5f454a5e96c02694ef1761a87fb55b.jpeg) this is how the cristal looks like and is just near the HT1381 timekeeper ic ---
**Author:** ![Okjames](https://avatars.discourse-cdn.com/v4/letter/o/57b2e6/32.png) [@Okjames](https://community.inkbird.com/u/Okjames)\ **Post date:** [June 24, 2025, 10:04am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/11 "2025-06-24T10:04:20Z")
Yes! Makes a lot of sense. Well done ! I have 4 units and a number of others deployed for clients. This will give me a lot confidence going forward. I will apply as suggested and put them back in my active test lab. Thank you ! Cheers! ---
**Author:** ![teowc](https://avatars.discourse-cdn.com/v4/letter/t/b3f665/32.png) [@teowc](https://community.inkbird.com/u/teowc)\ **Post date:** [July 5, 2025, 6:48am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/12 "2025-07-05T06:48:26Z")
> [@Role](#): > > 8pf capacitors Hi Role, Can you share photos of the “repaired” one? Where can I buy the 8pf capacitors? We are not engineers but very keen to try out… ---
**Author:** ![teowc](https://avatars.discourse-cdn.com/v4/letter/t/b3f665/32.png) [@teowc](https://community.inkbird.com/u/teowc)\ **Post date:** [July 5, 2025, 1:02pm UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/13 "2025-07-05T13:02:31Z")
Capacitor spec 1206 8PF 5% 50V NPO Is this ok? ---
**Author:** ![Okjames](https://avatars.discourse-cdn.com/v4/letter/o/57b2e6/32.png) [@Okjames](https://community.inkbird.com/u/Okjames)\ **Post date:** [July 17, 2025, 11:47pm UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/14 "2025-07-17T23:47:21Z")
![IMG_8457](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/b/b68f0481abd8e175b36676dad764c3b429eee4cb.jpeg) ![IMG_8458](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/0/0a6e4b16c999aca87b2453022c1acced1938317c.jpeg) The attached photos will help you understand the challenge in soldering a 8 pfd cap between U4 pin 2 and 4 GND and second cap between pin 3 and 4 GND. While it is easier to connect to the crystal legs it is not recommended hence the reference to solder to the IC legs. ---
**Author:** ![teowc](https://avatars.discourse-cdn.com/v4/letter/t/b3f665/32.png) [@teowc](https://community.inkbird.com/u/teowc)\ **Post date:** [July 18, 2025, 2:04am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/15 "2025-07-18T02:04:18Z")
Thank you for sharing the details photos… For the 8pf capacitor, which type specifically should we get…as attached, there is ceramic capacitor and others are in “uF” measurement with voltage specification. ---
**Author:** ![teowc](https://avatars.discourse-cdn.com/v4/letter/t/b3f665/32.png) [@teowc](https://community.inkbird.com/u/teowc)\ **Post date:** [July 18, 2025, 2:05am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/16 "2025-07-18T02:05:34Z")
![image](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/c/c3615d45de68ab930a7ab61593ef0d9660e1dc2c.png) ---
**Author:** ![teowc](https://avatars.discourse-cdn.com/v4/letter/t/b3f665/32.png) [@teowc](https://community.inkbird.com/u/teowc)\ **Post date:** [July 18, 2025, 2:06am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/17 "2025-07-18T02:06:22Z")
![image](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/6/6d9e390500b2f3295eee00deef3c3a1c5aca4805.jpeg) ---
**Author:** ![Okjames](https://avatars.discourse-cdn.com/v4/letter/o/57b2e6/32.png) [@Okjames](https://community.inkbird.com/u/Okjames)\ **Post date:** [July 18, 2025, 2:43am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/18 "2025-07-18T02:43:01Z")
Yes The small ceramic capacitors. Try to connect with as short legs as you can manage. ---
**Author:** ![Evom](https://avatars.discourse-cdn.com/v4/letter/e/439d5e/32.png) [@Evom](https://community.inkbird.com/u/Evom)\ **Post date:** [July 19, 2025, 9:21am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/19 "2025-07-19T09:21:31Z")
Thanks guys for this important information! Worth a try. I have 2 error units. If there’s anymore technical tips about doing this modification, please post 🙏🏻👍😄 ---
**Author:** ![Evom](https://avatars.discourse-cdn.com/v4/letter/e/439d5e/32.png) [@Evom](https://community.inkbird.com/u/Evom)\ **Post date:** [July 19, 2025, 9:25am UTC](https://community.inkbird.com/t/iic-800-line-error-alarm/166130/20 "2025-07-19T09:25:05Z")
Excuse my ignorance but what exactly is going on in the photo please? Have you replaced anything or just showing the location? [Next page](https://community.inkbird.com/t/iic-800-line-error-alarm/166130.md?page=2)