Panasonic Heat Pump - Fan Frequently turns on and off

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quartzblu

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#284534 28-Apr-2021 10:24

This will be our first winter with our Panasonic Z50VKR.

Ive noticed that the fan frequently turns off and on.

On the moment it starts running it would turn off the fan after a minute and then would continuously run for maybe 10 minutes.

After that it will turn off for 5 minutes and start running again for 5 minutes.

Not sure if something is wrong with it. On operation manual it says "Indoor fan stops occasionally during heating operation" Cause- "To avoid unintended cooling effect"

Anyone of you had this experience with your panasonic heat pump?

timmmay

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#2699141 28-Apr-2021 11:02

My Panasonic ducted starts every 3 minutes for 10 seconds. I assume it's to move the air around to check the temperatures. Apparently it can be disabled. I'm not liking the Panasonic unit much, the outdoor unit is SUPER loud.

The highwall units do turn off and on quite often to keep the temperature you set. It might also be defrosting the outdoor unit.

freitasm

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#2699150 28-Apr-2021 11:21

If you set a temperature the unit will stop for a while until it drops enough to turn on again. If you have good insulation, once the room reaches the intended temperature the pump won't be running fulltime.

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quartzblu

3 posts

Wannabe Geek

#2699208 28-Apr-2021 12:03

timmmay:

My Panasonic ducted starts every 3 minutes for 10 seconds. I assume it's to move the air around to check the temperatures. Apparently it can be disabled. I'm not liking the Panasonic unit much, the outdoor unit is SUPER loud.

The highwall units do turn off and on quite often to keep the temperature you set. It might also be defrosting the outdoor unit.

Do you know hot to disable it?

quartzblu

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#2699209 28-Apr-2021 12:05

freitasm:

If you set a temperature the unit will stop for a while until it drops enough to turn on again. If you have good insulation, once the room reaches the intended temperature the pump won't be running fulltime.

Yup, we have a good insulation. I set the temp to 20C and it would stop for 5 minutes and then will run again.

or sometimes off-on-off in a minute. dont understand its behavior.

timmmay

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#2699223 28-Apr-2021 12:41

quartzblu:

Yup, we have a good insulation. I set the temp to 20C and it would stop for 5 minutes and then will run again.

or sometimes off-on-off in a minute. dont understand its behavior.

Stopping and starting is normal. If they stayed on the room would get too hot. I suspect they sometimes push air through for a short time to make sure their thermostat has room temperature air moving past it so it knows what the temperature in the room is.

The logic in the Panasonic units doesn't seem as good as others. The Daikin and Fujitsu units I've had in the past also went on and off regularly, but less often than the Panasonic.

kingdragonfly

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#2699243 28-Apr-2021 13:44

timmmay:
My Panasonic ducted starts every 3 minutes for 10 seconds. I assume it's to move the air around to check the temperatures. Apparently it can be disabled. I'm not liking the Panasonic unit much, the outdoor unit is SUPER loud.

The highwall units do turn off and on quite often to keep the temperature you set. It might also be defrosting the outdoor unit.

I had the same problem with a noisy Panasonic outdoor unit. I complained to the installer, and they moved it 10 meters away.

The indoor unit is not exactly quiet either. It tends to creak and pop quite a bit. I liked my Fujitsu units better.

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timmmay

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#2699245 28-Apr-2021 13:53

kingdragonfly:

I had the same problem with a noisy Panasonic outdoor unit. I complained to the installer, and they moved it 10 meters away.

The indoor unit is not exactly quiet either. It tends to creak and pop quite a bit. I liked my Fujitsu units better.

I'm having mine removed and replacing with a Daikin.

RunningMan

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#2699261 28-Apr-2021 15:38

Have a Panasonic which does exactly the same. When on cool though, the logic is different and the fan always goes. The explanation seems to be so there aren't any draughts in heating mode.

JayADee

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#2699273 28-Apr-2021 16:41

Do you have it on auto or heat only? On heat only it stops when the temperature is met is my understanding, then kicks back in as required. On auto I think they try to maintain the temp by heating and cooling so run more. I have ours on heat only in winter and cool only in summer.

The odd time mine acts up I switch it completely off at the wall outside, leave it a while then turn it back on.

Ours is a Mitsubishi, split system running 3 indoor units off one outdoor one, had it a quite while now.