Press the SET key once to enter the control temperature setting, press ▲ or ▼ keys to adjust your set point temperature. Press SET button again to exit setting mode.
Press and hold SET button for three seconds to enter the system menu settings, press ▲ or▼ button to select the menu, press the SET button once to enter the appropriate parameter settings, press ▲ or ▼ button to modify the parameters.
After adjustment, you can exit by pressing the RST key, or by waiting for 5 seconds.
Menu codes:
HC Heating or Cooling mode control
d Temperature differential
LS Minimum set limits
HS Maximum set limits
CA Tempreature calibration
PT Compressor delay
The compressor delay comes factory set to 1 min, so if you weren't waiting 1 min for the relay to activate after turning the unit on, that very well could have been your problem. Once you get it up and running, I'd suggest putting the compressor delay at the max setting (10 min) to protect your compressor from short cycling.
Hope this helps.