Subaru R-12, R-134A manual Performance Test Results, Standard Compressor Systems

Subaru Air Conditioning Systems

Performance Test Results

Standard Compressor Systems

➊System performs to specifications; test complete

➋Higher than normal pressures indicate: —Restriction of air across

condenser —Defective cooling fan(s) —Refrigerant overcharge

—Restriction in system —Air in system —Moisture in system

➌Lower than normal pressures indicate: —System is undercharged —Compressor is defective

Variable Displacement

Compressor Systems

➊System performs to

specifications, test complete

➋Higher than normal pressures indicate: —Restriction of air across

condenser —Defective cooling fan(s) —Refrigerant overcharge —Restriction in system —Air in system —Moisture in system

➌Lower than normal pressures indicate: —Compressor has shifted

to minimum stroke

•Stop engine

•Wait ten (10) minutes, retest —System is undercharged

•“Clunking” sound is normal

while charging system —Compressor is defective

Control Valve Testing—

Variable Displacement

Compressor

➊Bring compressor to the minimum stroke position —Open hood and windows —Set engine speed to fast idle

—Set blower speed to low —Set A/C control to A/C MAX

➋Suction pressure should be 25-35 psi

Note: When inlet air temperature to evaporator is “LOW”, the discharge pressure may appear to be excessively “LOW” and bubbles may be seen in sight glass. This condition is normal.

➌Lower than normal pressure indicates:

—System is undercharged, or —Compressor is NOT changing to minimum stroke

➍Switch system “ON” and “OFF”

➎If high and low side pressures remain equal —Extreme System undercharge, or —Defective compressor

Note: The clutches on the variable displacement Calsonic and DIESEL KIKI compressors are not serviceable. Always refer to the current Subaru Service Bulletins for possible future changes to this procedure.

Wrench	Related Air Conditioning Service Bulletins
End
The

Number	Date	Title	Remarks	Number Date		Title
15-42-87	05-18-87	Accessory A/C		10-57-90	05-29-90	A/C Compressor Inspection
		Justy S0A332A105
				10-58-90	05-30-90	Thermoprotector Service Procedure
15-44-87	05-26-87	Accessory AC
		(S0A332A1 05)	Install on (4EAT)	10-59-90	07-06-90	Thermoprotector Testing
						Procedure Clarification
02-70-89	08-24-89	Idle Speed
		Adjustment Procedure		10-60-90	08-14-90	Automatic Climate Control
		for MT/ECVT				Diagnostic Information
02-72-89	05-07-86	Idle Speed	Addendum to Service	10-61-91	07-02-91	Removal and Recycling of
		Adjustment Procedure	Bulletin #02-70-89			Refrigerant R-1 2
		for MT/ECVT
				10-62-91	09-20-91	Wynn’s Justy A/C
10-49-88	08-04-88	Fresh/Circ Air Lever				SOA329A110 & S0A329A112
		Not Holding Position
				10-63-93	04-12-93	R-134a Refrigerant Handling Procedures
10-50-89	05-29-89	Heater Gears
		(87-89 ‘L’ Series)		10-64-93	11-08-93	Heater Vent Door Binding Or Leaking Air
10-51-89	05-29-89	Compressor Oil (Legacy)		10-65-94	03-08-94	Proper Oils For Subaru A/C Systems
10-52-89	07-28-89	V-5 Compressor & A/C		10-66-94	06-17-94	R-12 and R-134a Air Conditioning System
		System Service Information				Handling Procedures
10-53-89	10-18-89	A/C System Servicing		10-67-94	11-11-94	Clicking Noise From The Heater
						Mode Door Actuator
10-55-90	01-29-90	Discontinued Shorting Loop
		For A/C Cut Relay		10-68-96R	07-01-98	Air Conditioning Retrofit Procedures
						R-12 to R-134a
10-56-90	01 -29-90	Heater Gears - ‘87 to ‘89
		‘L’ Series & XT Models

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