SAFARI

39 AIRCONDITIONING 3. Refrigerant Fails to Circulate (Cycle Is Clogged Up) Problem Cause Check and remedy 1 when completely clogged up -Check receiver, ex- Vacuum is imme- pansion valves, diately indicated EPR, etc. on the low pressu- -A temperature dif- re side. Clogging of ference occurs be- A/C cycle tween IN and OUT 2. When slightly of the defective clogged up parts. Vacuum is gradu- -Be Sure to evacu- ally indicated on ate the air after fin- the low pressure ishing the remedy. side 4. Moisture Entered in the Cycle Problem Cause Check and remedy 1. The air condi- tioner operates Freezing of -Check the expan- normally at the expansion sion valve, etc. beginning, but valve from -Replace receiver over time, vac- the press- (or dryer) uum is indicated ence mois- Be sure to evacu- on the low pres- ture ate the air after fin- sure side. ishing the remedy. 5. Compressor Compression Failure Problem Cause Check and remedy 1. Pressure on low -Check compressor pressure side is - in the case of a high; pressure on compression mal- high pressure function of the side is low. Compressor compressor (the 2. When the A/C is defect compressor is not turned off the hot to the touch) low and high pressure sides soon equalize. Caution With a variable capacity type compressor, it is easy to mistake compression failure depending on several variable conditions. therefore, per- from troubleshooting by following the test procedure for the capacity compressor. Fig. 55 - Refrigerant fails to circulate Fig. 56 - Moisture entered in cycle Fig. 57 - Compressor compression failure