A/C SYSTEM GENERAL DIAGNOSTIC PROCEDURES
Article Text (p. 5)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 04:42PM
and on too rapidly. Switch
NORMAL NORMAL Cycling clutch systems only - Misadjusted
to compressor doesn't turn on Thermostatic
HIGH soon enough. Discharge air Switch or
becomes warm as low side Defective
pressure rises. Pressure
Sensing Switch
LOW LOW Bubbles in sight glass. Low R-12
Outlet air slightly cool. Charge
LOW LOW Sight glass clear. Outlet Excessively
air very warm. Low R-12
Charge
LOW LOW Outlet air slightly cool. Expansion
Sweating or frost at Valve Stuck
expansion valve. Closed Screen
Plugged or
Sensing Bulb
Malfunction
LOW LOW Outlet air slightly cool. Restriction
High side line cool to touch. on High Side
Sweating or frost on high
side.
LOW HIGH Evaporator outlet pipe cold. STV Stuck
Low side goes into vacuum Open
when blower is disconnected.
HIGH LOW Evaporator outlet pipe warm. STV Stuck
Outlet air warm. Closed
HIGH LOW Noise from compressor. Compressor
Malfunction
HIGH HIGH Outlet air warm. Liquid Compressor
line very hot. Bubbles in Malfunction
sight glass. or R-12
Overcharge
HIGH HIGH Outlet air slightly cool. Large Amount
Bubbles in sight glass. of Air and
Moisture in
System
HIGH HIGH Outlet air warm. Evaporator Expansion
outlet sweating and frost. Valve
Stuck Open
(1) - If equipped with a low refrigerant charge protection system,
compressor operation may have stopped.
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