View Full Version : lower temps from prommy??
Barracuda
06-01-2003, 10:53 PM
hi all i would like to know how can i get lower temps from my prommy.I have defults settings now.Can anyone tell me step by step what is the best settings at prommys digital panel to have the lower temps that i can get?
thank you in advance
SmokeyTheBandit
06-02-2003, 01:04 AM
Try this !
St1 = -20
St2 = -33
P1 = 13
P2 = 13
P3 = 2.0
P14 = 1.6
P25 = -55
P26 = 40
P27 = 2.0
P28 = 0
CodeRed
06-02-2003, 01:29 AM
P14 is the sensor calibration offset. Do not change this unless you want to introduce an offset into your temp readings.
Those numbers look just like the standard factory default values?
St1 and St2 are default, right?
So, what do these settings improve? I have tried messing with the settings, but it keeps idling around -33 after a few hours.
CodeRed
06-02-2003, 01:51 AM
Lowering St2 is the only setting that will improve temps by running the fans at full speed. The only drawback is that the heater is turned off so this is not good for long term use as condensation may form on the top of the evaporator block.
You could manually run the fans at full speed (and leave the heater on) if you short the zener diode located between terminals 10 and 11 of the control unit. This zener is used to drop the voltage to the condensor fan to 7.3V.
There is another 4.7V zener on the rear fan. I have also removed this one to keep more airflow over my compressor. Its running bloody hot with 404a in it.