User Panel
User Panel
User Panel
|
Posted: 4/28/2024 12:18:47 AM EDT
    Trying to help a person with a big airhandler. |
|
|
|
Posted: 4/28/2024 12:23:35 AM EDT
[#1]
To check the fuse, pull it out and check across it for ohms. I have seen people check for voltage on both sides but I have seen a bad fuse with a circuit that backfeeds and looks good like that but it's not.
|
|
|
|
Posted: 4/28/2024 8:31:52 AM EDT
[#2]
Been getting intermittant Google service where I live too ......... How to Check Fuse with Multimeter |
|
|
|
Posted: 4/28/2024 9:16:38 AM EDT
[#3]
Just read voltage across the fuse. Don't even have to remove it. If it's zero and hot, [power going to it] it's good, if you get a voltage differential [say it's a 120v line for a 240v A/C compressor] of 120v or close it's bad.
If you have no power to it [the box] at all, just OHM it out. 0.00 good, OL, bad. |
|
|
|
Posted: 4/28/2024 10:31:28 PM EDT
[#4]
Quote HistoryQuoted: Just read voltage across the fuse. Don't even have to remove it. If it's zero and hot, [power going to it] it's good, if you get a voltage differential [say it's a 120v line for a 240v A/C compressor] of 120v or close it's bad. If you have no power to it [the box] at all, just OHM it out. 0.00 good, OL, bad. I recently had three phase that had voltage on both sides of a bad fuse from backfed circuits. As far as I'm concerned pull the fuse out check for ohms is the only way to know 100%. |
|
|
|
Posted: 4/28/2024 10:36:31 PM EDT
[#5]
Think about worst case scenario here sparky.
|
|
|
|
Posted: 4/29/2024 3:35:57 PM EDT
[#6]
Quote HistoryQuoted: I recently had three phase that had voltage on both sides of a bad fuse from backfed circuits. As far as I'm concerned pull the fuse out check for ohms is the only way to know 100%. Quote HistoryQuoted: Quoted: Just read voltage across the fuse. Don't even have to remove it. If it's zero and hot, [power going to it] it's good, if you get a voltage differential [say it's a 120v line for a 240v A/C compressor] of 120v or close it's bad. If you have no power to it [the box] at all, just OHM it out. 0.00 good, OL, bad. I recently had three phase that had voltage on both sides of a bad fuse from backfed circuits. As far as I'm concerned pull the fuse out check for ohms is the only way to know 100%. Fxntime's method still works on 3 phase. Voltage across an individual fuse would mean it's blown, no voltage is good. He's talking about reading across single fuses, not taking readings off the load side to ground or neutral. |
|
|
|
Posted: 4/29/2024 4:00:18 PM EDT
[#7]
Ohmmeter
|
|
|
|
Posted: 5/5/2024 11:34:42 PM EDT
[#8]
Pulled all fuses and test with my fluke 117.
All tested good with ohms. DID NOT TEST WITH POWER. Not my cup of tea. They are going to have to call a pro. |
|
|
|
Posted: 5/6/2024 12:15:20 AM EDT
[#9]
Put a voltmeter across it. If the circuit is otherwise closed, you'll see voltage.
|
|
|
|
Posted: 5/6/2024 12:23:31 AM EDT
[#10]
Those fuses for the AC line voltage and transformer. The DC bus fuse is likely internal to the inverter.
|
|
|
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
