Electrical Help
 
Thread Tools Search this Thread Display Modes
Old 01-31-2013, 03:23 AM   #1
Junior Member
 
718tech's Avatar
 
Trade: HVAC technician
Join Date: Jan 2013
Location: brooklyn, NY
Posts: 1
Default

Electrical Help

Hey fellas im new to the hvac field. today i was working on a Trane Water cool vertical heat pump. the unit have a contactor for the compressor and a relay with a set of NO contacts for the blower fan.... But when the unit is leave on a while the fan relay starts to make a buzzing noise and the fan cuts off.. Compressor stays on .... would u guys say its just a bad relay and change it out or also consider the Tformer which is a 75va??

718tech is offline  
Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. HVACSite.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Old 02-03-2013, 05:49 PM   #2
Senior Member
 
beenthere's Avatar
 
Trade: Service/Installation
Join Date: May 2009
Posts: 721
Default

Re: Electrical Help

Or a problem with a wire connection, or thermostat if its an older mercury one.
__________________
How many times must one fix something before it is fixed?
beenthere is offline  
Old 02-12-2013, 03:08 PM   #3
Electrician
 
HARRY304E's Avatar
 
Trade: Electrical
Join Date: Nov 2012
Location: MA
Posts: 19
Default

Re: Electrical Help

Quote:
Originally Posted by 718tech View Post
Hey fellas im new to the hvac field. today i was working on a Trane Water cool vertical heat pump. the unit have a contactor for the compressor and a relay with a set of NO contacts for the blower fan.... But when the unit is leave on a while the fan relay starts to make a buzzing noise and the fan cuts off.. Compressor stays on .... would u guys say its just a bad relay and change it out or also consider the Tformer which is a 75va??
Your voltage could be low as well.
HARRY304E is offline  
Old 03-18-2013, 02:42 PM   #4
Junior Member
 
ComfortService's Avatar
 
Trade: HVAC
Join Date: Feb 2013
Location: Huntsville,AL
Posts: 5
Default

Re: Electrical Help

If compressor stays on, your problem shouldnt be with the transformer.

Most likely it is with the relay, the motor capacitor or the motor itself
ComfortService is offline  
Old 03-23-2013, 09:57 PM   #5
Junior Member
 
Superdave1's Avatar
 
Trade: HVAC Contractor
Join Date: Mar 2013
Location: Houston, Texas
Posts: 19
Default

Re: Electrical Help

Try to eliminate as many components as you can, amp motors and compare to rating, ck capacitors etc.

in this case most likely a relay, or a over-amping motor causing a failed relay????
Superdave1 is offline  

Tags
electrical


« Previous Thread | Top of Page | What's New | Next Thread »
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Electrical safety at work JackClay HVAC Work Safety 1 09-14-2011 04:34 PM
ELectrical Problem w/Consolidated Furnace JiNCs Residential HVAC Forum 7 10-04-2010 11:20 AM

Join Now... It's Fast and FREE!

Privacy Badge
I am a professional contractor
I am a DIY Homeowner
HVACSite.com is for
PROFESSIONAL HVAC CONTRACTORS ONLY!

At HVACSite.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?


SEO by vBSEO 3.6.0