SAFARI

40 AIRCONDITIONING 6. Excessive Refrigerant, or Insufficient Condenser Cooling Problem Cause Check and remedy - Check refrigerant quantity. 1. Pressure is high - Slowly vent out re- on both low pres- Excessive frigerant if over- sure and high refrigerant charged. pressure sides. - Check and repair 2. Bubbles can not Poor con- condenser fan. be seen in the denser - Check vehicle cool sight glass cooling ing system. 7. Air Entered in the Cycle Problem Cause Check and remedy 1. Pressure is high on both low pres- sure and high - Replace the refrig- pressure sides. erant 2. The low pressure Air is en- - Be sure to evacu- piping is hot to tered in the ate the air after fin- the touch. cycle ishing the remedy. 3. Bubbles are visi- ble in the sight glass 8. Expansion Valve Opens too Far Problem Cause Check and remedy 1. Pressure is high - Check expansion on both low pres- valve. sure and high - Check the installa- pressure sides. tion condition of 2. Frost (dew) ap- Expansion the temperature pears on the low valve fault sensing bulb. pressure side pip- - This problem fre- ing quently occurs af- ter replacing the expansion valve Fig. 58 - Excessive refrigerant, or insufficient condenser cooling Fig. 59 - Air entered in the cycle Fig. 60 - Expansion valve opens too far