No temperature display cant set temperature

The water jet motor is most likely defective.

Is the voltage correct ?

Hi, I am not a hot tub expert and I don't know what PR status is or what PL on the display means . However I did a quick search for you and have a web address that might help you find a solution.
http://www.spacare.com/troubleshootingguideforspaandhottubs.aspx
Hope it helps you
Regards
Steve

Your spa is in Economy Mode:
Ecn or Ec MessageEcn or Ec Message

If the Ecn or Ec Message is Alternating with the Water Temperature on the Display, the Spa is Operating in the Economy Heating Mode.

If the Ecn or Ec Message is ON Solid (Not Flashing) on the Display, the Spa is Operating in the Economy Heating Mode, but there is No current water temperature because the Spa is between Filter Cycles.

Ecn or Ec is Alternating with Temp:
The Spa is Operating in the "Economy" (Ecn or Ec) Heating Mode.

The Water Temperature is Sampled Only during Programmed Filter Cycles. The Heater will Only operate and Heat up to Set Temperature during the Filter Cycles. The Water Temperature will probably drop Below Set Temperature between Filter Cycles. Other Heating Modes are Standard, Standard in Economy, and Sleep Modes.

Ecn or Ec is ON Solid (Not Flashing):
The Current Water Temperature is "Unknown" (- - - or - -) while in Economy or Sleep Mode.

Between Filter Cycles, while in the Economy or Sleep Heating Modes, the Pump has not turned ON and the Last Water Temperature is not Current. To read the Current Water Temperature, either Change to Standard Heating Mode or turn On the Heating Related Pump, and wait at least 2 Minutes.

Hold temperature UP & DOWN together for 6 seconds.
or
Balboa 7 button controls, both buttons to the left of the display screen & down temperature.

Priming can be done many different ways depending on thetubs design. Some tub manufactures provide bleed valves located on the plumbingjust beyond the pump and heater unions. Some pumps have a bleed valve locatedon the pump. If there are no bleed valves then you will have to release theunion nuts to allow the air to escape.
You can find answers to common spa or bath problems online at http://www.balboadirect.com/support.aspx
Hope that helps.

Hello!
I have a question about my Balboy 500Z. When the water is heated the motor pump is still running that means the pump runs all the time without interrupt even the water has it's temperature. Now my question: is it possible to turn of the pump? thank you for your quick answer! Greetings Beat from Switzerland

I have a 6 month old Balboa 500Z. I have noticed that the filter system tis running all the time 24/7. I have reset the filter cycle to run for 2 hours { F2 }. It still is running all the time. It dose not seem to make a difference what I set the cycle for it just keeps running

sound like you have the filter cycle set to fc means filters all the time try to push temp button and then pump button. in sequence you want it to be f2 means filters 2hrs every 12 hours