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Egyras / HeishaMon

Panasonic Aquarea air-water H, J, K and L series protocol decrypt
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Communication Error H74 #487

Open Skol6 opened 1 month ago

Skol6 commented 1 month ago

Hi Folks,

Heishamon was running for several weeks without any issues. during the last days I got multiple times commincation error H74.

Not nowing what could be the problem I have performed a complete power cycle of my aquarea heat pump. Afterwards everything is running normal again.

Can someone confirm this issue?

Keisha0815 commented 2 weeks ago

Hi Skol6, my Heishamon yesterday losts its connection to the heatpump too. Where have you read the error number? I´ve tried to reboot but it does not run. After a complete power cycle it would connect again and now it works until ...? In the OptionalPCB.md you can see the error H74 is a problem with OptionalPCB:

Remark 3: Setting in HP Service settings Optional PCB to YES gives expectation ,that Optional PCB emulator ( HeishaMon) will sent continuously Optional PCB Set Command. When communication disappear (for around 40s) HP generates H74 error and switches off to StandBy. So ensure continiues communication is very important , be aware during switch off , factory default of HeishaMon , or similar action.

Maybe this was my problem too ...Testing the Options Good Luck, Armin

Skol6 commented 2 weeks ago

Hi, the error number was shown directly in the heat pump menu.

Thanks for the remark information. BUT I did not change anything when the failures where coming up. Maybe the reason is full memory and slow communication. I will try to keep an eye on it.

Regards

Keisha0815 commented 2 weeks ago

Hi, i‘ve not seen any errors in the heishamon menu. Have you installed the CZ-NS5P? Wifi-Problems?

Skol6 commented 2 days ago

I am not using the CZ-NS5P.

IgorYbema commented 2 days ago

Not using the CZ-NS5P but you are getting H74? Then you most be using the optional pcb emulation in heishamon and enable the optional pcb in the heatpump. The emulation is not perfect. If heishamon fails/get delayed the communication stops and causing the H74. This can be caused by so many reason but mainly network related as heishamon is a single threaded device not able to handle network delays together with communication to the heatpump at the same time.