Results 1 to 6 of 6
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21-01-2019, 09:44 PM #1
Daikin twin not ramping up on heating
Chaps
got a 4kw twin split 2012.
both indoors run on cooling as normal. but on heating the unit will only ramp up to 240psig and hence no real heat effect
The refrigerant charge is correct so I'm thinking it's possibly sensor ?
suggestions etc
richard
(not always sunny Tenerife)
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22-01-2019, 08:08 AM #2
Re: Daikin twin not ramping up on heating
Hi Richard,
Can this help?
http://www.refrigeration-engineer.co...not-ramping-up
Peter (This morning everything covered with snow and -3°C)
PS: Is your back healed again?It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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22-01-2019, 08:08 AM #3
Re: Daikin twin not ramping up on heating
Make and model please might give us a little more of a clue.
Mobile A/C at its best, see avatar.
Bedford. Now retired and trying to relax.
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22-01-2019, 01:54 PM #4
Re: Daikin twin not ramping up on heating
Hi Richard
It could be the indoor coil sensor or the outdoor discharge thermistor out of calibration.
In cooling mode, the indoor sensor is used for freeze up protection, but in heating, it is used for holding off the indoor fan until the coil temp is above 34C to prevent cold draughts. In the meantime, the compressor will hang back waiting for the indoor signal to ramp up.
If the compressor discharge thermistor is reading incorrectly then the unit will prevent the compressor ramping up due to discharge protection control.
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23-01-2019, 08:20 AM #5
Re: Daikin twin not ramping up on heating
With this free app from Daikin, you can find the resistance values
Without this app, I can't service a VRV :-)
https://play.google.com/store/apps/d...n.aircon&hl=nlIt's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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24-01-2019, 10:20 PM #6
Re: Daikin twin not ramping up on heating
Returned to site today.
Thought I'd go through a run again before pulling it apart.. As you'd expect both indoor units ramped up to full heating. 45 minutes later everything worked as normal
Left alone till the next time it fails
Thanks to all.