| Author | Message | ||
| Bob greenwood (Bob_greenwood)
Registered Member Username: Bob_greenwood Post Number: 95 Registered: 7-2006 Posted From: 63.233.94.62 Rating: N/A |
I installed a used roof air,ran good for a few weeks,then, the compressor quit comeing on. SO, I replaced 'start capacitor'...nothing,so I replaced 'run' capacitors,still nothing, I can hear the unit 'try' to start the compressor,but, it just humms for a few seconds & a click,which,I guess ,means it quit trying. anybody KNOW,have had a lot of "guesses". | ||
| David Dulmage (Daved)
Registered Member Username: Daved Post Number: 132 Registered: 12-2003 Posted From: 142.46.199.30 Rating: N/A |
If you are connected to shore power, have you measured the voltage at the power outlet where you are plugged in. Brownouts are not uncommon at this time of year; heavy demand in a campground can also result in a voltage drop if wiring in the campground is inadequate. This can result in a roof air conditioners, particulary older models, not starting. FWIW DaveD | ||
| Tim Strommen (Tim_strommen)
Registered Member Username: Tim_strommen Post Number: 233 Registered: 11-2004 Posted From: 64.186.173.26 Rating: N/A |
Do you have a current clamp? It'll be easy to tell if the motor is seized if it's drawing it rating (or higher) during start-up. I'd also recommend reading the voltge while it's staring up (or trying to). If your voltage goes way down (or is more than 10% below spec before start-up) you can over load a compressor motor - which can burn out windings. If' you've already replaced all of the auxilliary components to the compressor, you may wish to try by-passing the switches and starting the motor up by plugging it into an extension cord directly (CAUTION: do not do this without some form of current limiting - i.e. a breaker or fuse). If it doesn't start up then - you may need to look into replacing the A/C -Tim | ||
| Bob greenwood (Bob_greenwood)
Registered Member Username: Bob_greenwood Post Number: 96 Registered: 7-2006 Posted From: 65.142.253.172 Rating: N/A |
have had power company out..it's 119,the other unit comes on & runs fine.they both have#10 WIRE,does it sound like compressor is out, the unit seems to be drawing a BUNCH of elec. while it is trying to start, I'm not an electrician, don't have any idea how to check the currant draw. | ||
| Nick Badame Refrigeration Co. (Dnick85)
Registered Member Username: Dnick85 Post Number: 42 Registered: 2-2006 Posted From: 66.174.79.235 Rating: N/A |
Hi Bob, It sounds like you have [Locked Rotar]. Thats when a part of the piston or bearing has come apart and that piece has jammed the rotation of the pistons. You will get a brief current draw and then you will hear a click. This is the internal overload doing it's job. Sounds like you should find another unit.. Good Luck Nick- | ||
| Muddog16 (Muddog16)
Registered Member Username: Muddog16 Post Number: 291 Registered: 11-2004 Posted From: 4.224.189.221 Rating: N/A |
Excellant diagnosis, Nick! | ||
| Art Gill (Sandcastle)
Registered Member Username: Sandcastle Post Number: 14 Registered: 5-2004 Posted From: 208.11.184.64 Rating: N/A |
Does the fan run? I have a roof air that I have to hand start the fan at the beginning of each season. If the fan doesn't run the compressor will run for a few mimutes and then shut down. If the fan run, Oh Well. Art | ||
| John Ferguson (Jarlaxle)
Registered Member Username: Jarlaxle Post Number: 8 Registered: 7-2006 Posted From: 65.143.26.135 Rating: N/A |
Hmm...one fan on the fritz, one bad compressor/motor. Sounds like you two need to get together.  |