coffeMachine, User. Public/Private

"use strict";
function PUser(name) {
  "use strict";
  let rname = name;
  const sbue = 'Bue! ';
  this.sayHi = () =>
  console.log('hey ' + rname, bue());
  //this.setName = (name) => rname = name;
  Object.defineProperty(this, 'rname', {
    get: () => rname,
    set: (name) => {rname = name;}
  });
  let bue = ()=>`${sbue}${rname}`;
}
var nuser = new PUser('Vas');
nuser.sayHi();
// nuser.setName('sobol');
nuser.rname = 'sobol';
nuser.sayHi();
console.log(nuser.rname);

/**
* CoffeeMachine constructor
* @param {integer} power
* @param {integer} capacity
*/
function CoffeeMachine(power, capacity) {
  'use strict';
  if (!isFinite(power) || !isFinite(capacity)) throw new Error('Power and Capacity mast be a Integer')
  let waterAmount = 0;
  let timerId;
  let self = this;
  let running = false;
  this.run = () => {
    console.log(`Is running: ${running=true}`);
    timerId = setTimeout(onReady, getBoilTime());
  }
  this.stop = () => {
    clearTimeout(timerId);
    running = false;
    console.log('Stopped!');
  };
  //getter/seter via method
  this.wa = (amount = 0) => {
    if (!amount) return waterAmount;
    waterAmount = amount;
  };
  this.addWater = (addWater)=>{
    let newAmount = waterAmount + addWater;
    if (newAmount<0 || newAmount>capacity) throw new Error("Check water add count");
    else waterAmount = newAmount;
  }
  //getter/setter via property
  Object.defineProperties(this, {
    "power": {
      get: () => {
        return power;
      }
    },
    "running": {
      get: ()=>{return running;}
    },
    "waterAmount": {
      get: () => waterAmount,
      set: (amount) => {
        switch (amount) {
          case (amount < 0) :
            throw new Error('Less then 0');
            break;
          case (amount > capacity) :
            throw new Error('More then capacity');
            break;
          default:
            waterAmount = amount;
        }
      }
    }
  });
  let getBoilTime = function () {
    const c = 4200;
    const dT = 80;
    return c * waterAmount * dT / power;
  }; //.bind(this);
  function onReady() {
    console.log('Coffee ready!');
    running = false;
  }
}
var coffeeMachine = new CoffeeMachine(100000, 300);
coffeeMachine.waterAmount = 200;
coffeeMachine.addWater(100);
console.log(coffeeMachine.waterAmount + ' ' + coffeeMachine.power);
// coffeeMachine.wa(219);
console.log('Remind ', coffeeMachine.wa());
coffeeMachine.run();
console.log(coffeeMachine.running);
 setTimeout(function(){console.log(coffeeMachine.running)},3000);

/**
* User constructor with private and public methods
*/
function User(){
  let firstName, surName;
  this.getFullName = ()=> `${firstName} ${surName}`;
  Object.defineProperties(this,{
    firstName:{
      set: (fName)=>{firstName = fName;}
    },
    surName:{
      set: (sName)=>{surName = sName;}
    }
  });
}

var user = new User;
user.surName = "Doe";
user.firstName = "John";
console.log(user.getFullName());