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Old 08-13-2011, 02:33 PM   #1
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Trane Heat Pump not blowing cold or hot air


I live in a condo in a high rise building. My Trane Heat pump just stopped blowing cold and hot air. You can turn the heat up or down on the thermostat and the unit will blow air, it just won't be chilled or heated. The LED diagnostic lights indicate the unit is running fine.

My neighbor said the same thing happened to her, and it was a control board. She said the HVAC tech just bypassed the board until the part came in, and that it worked fine in the interim after he did that.

How do I perform this bypass?


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Old 08-13-2011, 02:43 PM   #2
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Trane Heat Pump not blowing cold or hot air


You need to determine the actual problem before trying to bypass something.

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Old 08-13-2011, 02:56 PM   #3
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Trane Heat Pump not blowing cold or hot air


Thanks for the quick response. Could you give me some direction as where to start? Again, per the LED lights, everything should be OK, no cold or hot air, just ambient.

The other tenants in the building have no problems with their HVAC, as it is a shared system.
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Old 08-13-2011, 03:12 PM   #4
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Trane Heat Pump not blowing cold or hot air


Call hvac tech
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**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
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Old 08-13-2011, 03:18 PM   #5
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Trane Heat Pump not blowing cold or hot air


How would I test this control board?
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Old 08-13-2011, 03:26 PM   #6
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Trane Heat Pump not blowing cold or hot air


Reading the LED lights code.
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**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
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Old 08-13-2011, 03:30 PM   #7
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Trane Heat Pump not blowing cold or hot air


Quote:
Originally Posted by JJboy View Post
Reading the LED lights code.
The LED lights code show operating normal, yet no hot or cold air.
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Old 08-13-2011, 03:33 PM   #8
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Trane Heat Pump not blowing cold or hot air


LED1 LED2 LED3
OFF OFF OFF Control OFF
ON OFF OFF Normal/Compressor OFF
ON OFF FLASH Anti-short cycle
ON OFF ON Normal/Compressor ON
FLASH ON OFF Brownout Condition
ON FLASH ON Soft Lockout (low pressure)
ON FLASH FLASH Soft Lockout (high pressure)
ON ON ON Manual Lockout (low pressure)
ON ON FLASH Manual Lockout (high pressure)
ON FLASH OFF Manual Lockout (condensate over-flow)
ON ON OFF Compres sor Disable
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Old 08-13-2011, 04:43 PM   #9
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Trane Heat Pump not blowing cold or hot air


Problem could be with the thermostat. Or with the thermostat wires.
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Old 08-13-2011, 04:46 PM   #10
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Trane Heat Pump not blowing cold or hot air


What do you mean by this being a shared system?
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Old 08-13-2011, 04:53 PM   #11
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Trane Heat Pump not blowing cold or hot air


Quote:
Originally Posted by Master of Cold View Post
What do you mean by this being a shared system?
There is a water chiller on the roof that carries that heated water away from all of the individual heat pumps. Once, when there was a water leak the heat pump did not work. There is no water leak right now, everyone else's HVAC works.

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Old 08-13-2011, 07:37 PM   #12
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Trane Heat Pump not blowing cold or hot air


You could have a water valve not opening, or a compressor that wont start.
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Old 08-13-2011, 08:07 PM   #13
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Trane Heat Pump not blowing cold or hot air


I think either of those scenarios would trigger a fault code.
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Old 11-02-2011, 11:13 AM   #14
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Trane Heat Pump not blowing cold or hot air


I am having same problem of no hot or cold air, but my led's are:
ON ON FLASH: Manual Lockout (high pressure)
New batteries on thermostat, yesterday they shut down the coolong towers in my ceiling, later on they were turned on. My neighbors unit is working perfectly but mine is not.
What would be the bypass for this?
Thanks
JB
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Old 11-02-2011, 03:24 PM   #15
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Trane Heat Pump not blowing cold or hot air


Turn power off to unit for 1 minute. Then back on, and see if fault clears. If so, it should work ok. If not, look for a manual reset on the high pressure switch in the unit.

Next time you hear they are turning off towers or pumps, turn your unit off. Until they turn tower or pumps back on.

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