HVAC Not Cooling

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  #1  
Old 10-11-18, 02:38 AM
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HVAC Not Cooling

Hi All,

My commercial building has an HVAC system. Recently it stops working and I saw the thermostat light is off. I changed the setting and try to start it again still didn't work. I changed the batteries as well. What could be the reason? Can you people help me
 
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  #2  
Old 10-11-18, 06:23 AM
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What thermostat is this? Is it part of a BAS system? Is there power to the thermostat?
 
  #3  
Old 10-11-18, 07:15 PM
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Welcome to the forums.

We'll need a bunch more information than that.
Most commercial systems don't use battery powered thermostats.
 
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Old 10-11-18, 10:09 PM
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There is power to thermostat.
 
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Old 10-11-18, 11:27 PM
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Thank You @PJMAX. Its an old model basically.
 
  #6  
Old 10-12-18, 12:10 AM
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If that's all the info you can provide, the answer is likely going to be to have a pro come out and look at it.
 
  #7  
Old 10-12-18, 04:27 AM
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Being it’s commercial you’ll have to tell us what kind of system your dealing with.
DX cooling, chilled water, VAV/VVT, VRF, what kind of system do you have?
Can you access the unit?
Do you have tools and a meter to troubleshoot?
What voltage is being delivered to the thermostat?
 
  #8  
Old 10-12-18, 06:55 AM
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Sorry, guys - he was a spammer.
 
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Old 10-12-18, 08:44 AM
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He just hit another website I frequent as well. Same user name.
 
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Old 10-12-18, 09:17 AM
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I reported him on another site I frequent but do not moderate - same pattern, same posts.
 
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