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I have a trane split system short cycling in heat pump mode

Customer Question
what could cause this...
I have a trane split system short cycling in heat pump mode what could cause this
Submitted: 1 year ago.Category: HVAC
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Answered in 1 minute by:
1/5/2016
HVAC Technician: airheatman, HVAC Technician replied 1 year ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,528
Experience: Furnace, A/C and heat pump specialist.
Verified

Are both indoor and outdoor short cycling or just one or the other and how long will it run and how long off?

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Customer reply replied 1 year ago
Just outdoor and about 15 seconds on and off
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Do you have refrigerant gauges so we can see what pressures are doing? Most of the time the outdoor will short cycle due to high or low pressure.The unit has a low pressure switch that will shut it off if refrigerant charge is low,indoor fan not moving air across evaporator or dirty filter drier and it has a high pressure switch that will shut it off if metering device fails, blocking flow of refrigerant, dirty outdoor coil or outdor fan not coming on.

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Customer reply replied 1 year ago
I put them on and pressures in heat was around 600 psi I switched to cool and pressures was 210 hi and 125 low just put it back to heat and hasn't cut off yet but I'm noticing the pressures going up and compressor amps
Customer reply replied 1 year ago
It just shut down when pressure hit 600 and cuts back on at 450 do you think overcharged
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

I suspect the metering device on indoor coil is not opening causing high head pressure in heat mode. If refrigerant was overcharged we would have higher pressures in cool mode also.

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Customer reply replied 1 year ago
System was overcharged had to calibrate my gauges was off I removed about 1lb of refrigerant and system is running good in both heating and cooling thanks
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Good deal.Let me know if you have any more issues I am here

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airheatman
airheatman
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Category: HVAC
Satisfied Customers: 8,528
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Experience: Furnace, A/C and heat pump specialist.

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