January 4, 20242 yr Yes indeed although whilst I anticipate that my engineer in fitting the new sensor will have been astute to the possibility that the same problem could reoccur, there are many other wires and checking them all will not be easy. The one which caused the problem on this occasion was partially hidden behind the pcb.
March 18, 20242 yr I’m involved in the installation of an ex display therma-v that didn’t come with the in-room display/controller and the dhw tank sensor. I’ve got part numbers and sources for those, but could someone sanity check my thoughts: It’s a 2 core cable from the display to the heat pump? The therma-v has a built in flow/buffer temperature sensor? There isn’t a volt-free call for heat input, just a 240v thermostat wiring strip? I should add that I don’t have the manual, just going off the wiring diagram on the inside of the door. @adam Huttel
March 18, 20242 yr You can get around the DHW temperature probe with an on off thermostat and two resistors. I works and is working currently for me. https://forum.buildhub.org.uk/topic/36003-pt100-cylinder-probe-wireless-connection/
March 18, 20242 yr 33 minutes ago, JohnMo said: You can get around the DHW temperature probe with an on off thermostat and two resistors. I works and is working currently for me. https://forum.buildhub.org.uk/topic/36003-pt100-cylinder-probe-wireless-connection/ I'd much rather not re-invent anything and just buy the correct part from City plumbing...
March 18, 20242 yr 3 hours ago, HughF said: I should add that I don’t have the manual, just going off the wiring diagram on the inside of the door. umm... get the manual?
March 18, 20242 yr 1 minute ago, dpmiller said: umm... get the manual? Yeh, found it now... LG aren't the easiest things to find details for. It's nicer in some ways than the Cool Energy, but much worse in other ways... Edited March 18, 20242 yr by HughF
March 21, 20242 yr I think somewhere back here is a post that says that the current Therma V generation controller does not work with the previous generation heat pump. Better check how long this ex-display model was on display.
November 5, 20241 yr On 18/03/2024 at 06:31, HughF said: I’m involved in the installation of an ex display therma-v that didn’t come with the in-room display/controller and the dhw tank sensor. I’ve got part numbers and sources for those, but could someone sanity check my thoughts: It’s a 2 core cable from the display to the heat pump? The therma-v has a built in flow/buffer temperature sensor? There isn’t a volt-free call for heat input, just a 240v thermostat wiring strip? I should add that I don’t have the manual, just going off the wiring diagram on the inside of the door. @adam Huttel Can you confirm that the thermostat uses a L, N and switched L as call for heat - all 240v? I am planning on using a wifi relay switch powered by the L and N and controlled by home automation (samsung smartthings) to use my smart thermostat to control the unit operation. With a thermostat controlling call for heat, will the AI still control the flow temp based on the external temp? Thanks Edited November 5, 20241 yr by Michael_S
November 5, 20241 yr I have a 2nd gen (U32) 12kwh purchased second hand. It is set up and running, heating only with the secondary immersion heater disabled via the dip switches. I am using the weather comp AI (-10 +55, 15 +25) to control the operation with the 'hysteresis' On-off range set to the highest values to minimise short cycling. On the controller you can manually apply a flow temp offset between +/- 3. Is these any way to automate this offset on a time programme so I can have a night time set back so we can have the house cooler at night? Thanks
November 7, 20241 yr On 05/11/2024 at 18:21, Michael_S said: On the controller you can manually apply a flow temp offset between +/- 3. Is these any way to automate this offset on a time programme so I can have a night time set back so we can have the house cooler at night? No. Unless, I suppose, it is an undocumented feature.
November 7, 20241 yr 41 minutes ago, ReedRichards said: No. Unless, I suppose, it is an undocumented feature. Thanks. Seems an odd omission, my 15 year old gas boiler with weather comp had this option. Perhaps they expect everyone to use a programable thermostat to control the unit?
November 8, 20241 yr On 07/11/2024 at 12:04, Michael_S said: Thanks. Seems an odd omission, my 15 year old gas boiler with weather comp had this option. Perhaps they expect everyone to use a programable thermostat to control the unit? Maybe, but then you can't use the Load Compensation capability ("Air + Water").
November 12, 20241 yr Another question - LG Therma V and power cuts. Default behaviour seems to be go to standby after a power interruption and lose the unit time and for mine set a random 'holiday' programme active every day. Having the unit default to basically 'off' after a power cut seems like a potential disaster if you are away on holiday in the winter and have a power outage - any way around this?
November 13, 20241 yr Maybe you can post a picture or two because your description isn't making sense to me?
May 25, 20251 yr Can anyone advise on LG part numbers for the LG wall controller? This is to fit a 7kW therma-v. helping my mate commission his unit that came ex-display with the controller missing. LG have been particularly useless on the phone/email so far.
May 28, 20251 yr On 25/05/2025 at 19:32, HughF said: Can anyone advise on LG part numbers for the LG wall controller? This is to fit a 7kW therma-v. helping my mate commission his unit that came ex-display with the controller missing. LG have been particularly useless on the phone/email so far. Will depend for on the serries Uxx number
June 19, 20251 yr On 29/05/2025 at 00:42, Michael_S said: Will depend for on the serries Uxx number Series 4 iirc
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