@Phaedrux
I Firmware is: 3.4.0beta7
I later changed config to M307 H2 A100 C10000 D2000 B1 S1.0 which kind of does the job, it doesn't throw errors anymore.

Is it possible to completely disable the chamber heating monitoring feature that spits out ""temperature rising too slowly" fault?

In my setup I have AC 500W heater with dedicated circuitry to control fan speed that blows exactly 70C air.
I use fan2 output to turn heater ON/OFF with SSR and 24V fan.

config.g

M308 S0 P"bedtemp" Y"thermistor" T102000 B4300 R4700 A"BedHeat" ; configure sensor 0 as thermistor on pin bedtemp
M308 S1 P"e0temp" Y"thermistor" T114000 B4300 R4700 A"Extruder" ; configure sensor 1 as thermistor on pin e0temp
M308 S2 P"e1temp" Y"thermistor" T100000 B4138 R4700 A"Chamber" ; Chamber Thermistor
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
M950 H2 C"fan2" T2 ; create chamber heater on fan2 and map it to sensor 2
M307 H1 B0 S1.00
M307 H1 A454.9 C173.2 D5.5 S1.00 V25.2 ; disable bang-bang mode for heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M141 H2 ; map chamber to heater 2
M143 H0 S100 T0 ; set temperature limit for heater 0 to 100C
M143 H1 S280 T1 ; set temperature limit for heater 1 to 280C
M143 H2 S60 T2 ; set temperature limit for heater 2 to 60C

thank you