Question about Fujitsu 18C1 Air Conditioner

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I turn on the unit and in about 1 .5 min it trips the cb ,, I put a amp probe on the circuit and found out that after 1.5 the unit jumps up to 40 amps on a 15 amp breacker which the unit is rated for . the unit never actually runs ,, it just trips the cb

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Firstly was the unit working previously on the same circuit? , if yes most likely there is a problem with the compressor(pot)this can be the compressor seized or winding shorted, It can also be the Capacitor for compressor faulty, It is worth replacing the capacitor with the same type and you may get lucky if not a new compressor is required,
Good luck
Tim

Posted on Jan 22, 2009

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You are going to have to install a disconnect box next to the unit, with the proper sized fused disconnect inside, and have a new breaker installed at the panel, when the unit comes on, its the compressor that takes the most energy to run, the compressor at start up draws alot of amps, You will need to talk to an Electrician to do your breaker and disconnect work,

Posted on Jan 20, 2009

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My Intex 603M will only run for 5 min or less before it trips it own circuit breaker.?


That unit has a GFCI breaker installed. Those are made to prevent electrocution. IF there is ANY water leakage from the pump into the area that supplies voltage, the breaker will trip. Make sure that there are no damp areas inside the unit and make sure that you have all the wires that it connects to wired correctly and have ground connections.

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1995 Mercury Grand Marquis blowing 40 amp fuse as soon as I turn on ignition


It will help if you can identify the 40 Amp fuse that is being toasted when the key is turned.

I looked briefly at a fusebox diagram and found 3 circuits protected by a 40 Amp fuse. The Lamp circuit protects several circuits which have smaller rated fuses on each separate wire. The 40 Amp protection seems to be a safeguard if all the smaller circuits are active in total. Turning off the automatic headlights, should reduce power drain.

The next circuit is the Rear window defroster. Can easily pull 40 Amps, but once the 40 Amp fuse breaks, it should have no effect on the engine.

The last circuit, on the cars with Trailer Tow or Police package has a
40 Amp fuse on the Battery charge Relay. This is a remote possibility. But the engine should be able to run without an Alternator for several minutes using Battery power.

Have them check the fuel pressure. The Inertia switch could have tripped while the car was being repaired. It does not explain the wiring short, but can explain the no start condition.

Again, if the same 40 Amp circuit is overloading, identify the circuit with the fuse box diagram.

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I have a new furnace and the breaker keeps tripping (20/30). It is a bryant westinghouse box. I think 200 amphes


1) You got a FIRE truck coming.

2) Wire is too small.
Problem is NOT circuit breaker.

3) Both 240Volt appliances on same breaker is a hazard, especially if space available in 200 amp service panel for more breakers.

4) Usually each 240V appliance has separate breaker.

5) Circuit breaker trips because of High heat on the wire.
If wire gets hot, it will start a fire inside the wall.

Electric code requires wire-size match breaker-size.

6) If you put larger amp breaker on same wire that is getting hot, then wire will get hotter.
Result: FIRE truck middle of night with folks jumping out window in glass-cut bare run across yard.

7) Each appliance has volts and watt rating on label.
EVERY appliance has label.

8) For example stove might be rated 8000 watts and 240Volt.
8000 watts divided by 240 volts = 33.3 amps
Stove would require 40 amp breaker and 8 gauge wire.

9) How to figure it out:
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/How-to-install-a-subpanel.html

10) Do same calculation for new furnace.
12000 watt furnace divided by 240 volts = 50 amps.
Use 60 amp breaker and 6 gauge wire.

11) Summary: fixya wants you to be safe, and buy stuff showing in the ads.
Use a bigger breaker ONLY when bigger wire is also installed.
Call furnace installer, the installer should know to check safe wiring before installing.

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What would cause a 1200A CB Main at exterior switch-gear when running only a chill water pump? The chill water pump circuit breaker is on a 1000A CB panel main. The 1200A CB would trip but not the 1000A...


Well 1000 amp stuff is out of my league, but I would guess it is possible the main circuit board might have sensing ability to detect a wiring problem. Perhaps the 3 phase polarity is wrong, the 4th ground pole is not making good contact, or something. With that much amperage, it could be the main needs more grounding rods spread further apart, and make sure you run an explicit ground wire between pump and main. Don't rely on ground rod at pump. Too many people get electrocuted that way.

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Just bought yamaha rx-v467 reciever, it worked for 2 mins then it trips out, wired all surround sound correctly. now unit only turns on for 2 secs then turns off. it does it 3 times and then you have to...


This is a common question on this site. Amps of all types have protection circuits to keep them from doing a self meltdown. Testing follows this logic. 1. Remove all speaker wires. 2. Keep the volume down - all the way. 3. Turn the unit on. 4. If it does not trip off, then there is a problem either in a speaker or the wiring. a. Reconnect one at a time until/unless it trips off b. That will tell you where to look further.
If it does trip off, then there is an internal circuit issue in the amp and probably requires professional help to fix.

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1 Answer

Single Split Wall Type Air Con Blows 15A CB as External Fan starts. Short in Fanmotor or Cap?


what size a/c ? will assume under 10,000 btu if cb blows on fan only and fan not turning assume fan problem caps will let fan hum like trying to start but a 15a seems low for a window unit also anything else on circuit best way to determine is use an amp probe to see how many amps are being drawn if amps peg meter on start a winding or short in motor

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1 Answer

I have a 220v 100 amp circuit breaker that feeds a sub-panel. The sub-panel has 3 circuits: a)60 amp Heater (unit 1 in house) b)60 amp A/C (unit 2 in house) c) 40 amp for pool equipment. The 100 amp...


your a/c uses the blower motor from the heater to distribute air check for loose wire connections that will raise amperage and also make sure you have the right size wire to each unit 40 amp should have 8 awg(copper) wire and 60 shouldbe 6 awg i think if the wire is to small=heat= higher amperage

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1 Answer

Circuit Breaker


you have 2 circuits that feed the garage , not a problem , the one that you stated tripped often is the one we are concerned with . now do you remember which one that was , if so we need to start there . the first thing to determine is the load on the circuit large enough to to justify tripping of the breaker , breakers tripping is not always an indication of a problem it simply means it is doing its job sometimes . To determine the load turn on all the devices normally on in the garage and get or borrow a amp probe a wrap around is the easiest to use open the breaker panel that feeds the garage and wrap the amp probe around the wire leaving the panel that feeds the circuit to the garage that is the one that trips see if the load is close to the rating on the breaker , if it is then the breaker is doing its job and the only solution it to split the load . now if the load needs to be split then don't forget you said you had two circuits feeding the garage so you might be able to divide the load more evenly between the two you already have before you have to run additional circuits , tripping of breakers is not always a bab thing in most cases in my 40 years of being an electrician it is a case of them doing there job and the load needs to be more evenly divided if this does not help let me know and we will dig deeper

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Transmissions


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