FAN1 DC drops when AC FAN2 comes on.

[oversteer]

Hello

I have a M150 GPRP, have FAN1 running factory fan controller PWM, and FAN2 is AC FAN via PDM output.

When AC cycles on and FAN2 is switched on FAN1 DC drops to minimum, and then goes back to running DC from table when FAN2/AC cycles off.
Both fans are set to be AC fan, I want maximum cooling when AC kicks in as I have an Interchiller WAIC set-up with 2 condensers that create a lot of heat and make engine temps an issue.

What am I missing here !? why does FAN1 stop when FAN2/AC turns on ?

M1fans.JPG (244.59 KiB) Viewed 36 times

[Stephen Dean]

Hi,

Can you post the PDM Config and M1 Package (send them through to support@motec.com.au if you prefer) so that we can have a look at them. We need to see the conditions that are triggering the operations.

[oversteer]

Tune;
https://drive.google.com/file/d/1noyxTW ... sp=sharing
pdm;
https://drive.google.com/file/d/1kfcRE8 ... sp=sharing
log;
https://drive.google.com/file/d/1OnxSah ... sp=sharing

Pdm doesn't have anything to do with main pwm fan, that has its own fuse and pwm controller, so it has to be the m1's logic thats stopping fan1 when 2 operates.