L11 CLIMATE CONTROL WORKING IRREGULARLY - Alfa - 166 - eLearn

3308677 - L11 CLIMATE CONTROL WORKING IRREGULARLY

The fan works properly and sends air into the interior compartment in accordance with the set flows, but this air sometimes reduces the temperature too much and sometimes too little

remember that the climate control system should be checked about once a year. Ascertain whether it has been checked recently. If it has not, recharge the system: Op. 5040A10

1	SYSTEM OPERATION CHECK	All OK	Problems met	Operation
		Results of the tests
	Check that the system cooling is correct: See Test 5040A Checking operation of air conditioner (temperature)	Continue to Step 2	The temperature decreases very slowly: insufficient fluid:	Recharge the system: Op. 5040A10
2	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check that there are no faults in the climate control control unit	Continue to Step 3	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore connection between climate control control unit and diagnostic connector ( See E6020 AIR CONDITIONING )
			Specific software not available	Continue to Step 3
3	CHECKING SYSTEM PRESSURE	All OK	Problems met	Operation
	After recharging the system ( Op. 5040A10 ), check the system pressures: See Test 5040B Check on operation of air conditioning system (pressures)	Continue to Step 4	High pressure does not increase or low pressure decreases too much: leaks in the circuit	Locate the leaks Op. 5040A14
			High pressure correct, low pressure very high	Replace the expansion valve Op. 5040B30
			High pressure high, low pressure below normal	Clean or replace the drier filter Op. 5040A44
			Irregular pressures: pipes or evaporator blocked	Wash the system: Op. 5040A10 If the fault persists, replace the evaporator: Op. 5040C60
4	CONDENSER CHECK	All OK	Problems met	Operation
	Visually inspect the condition of the condenser: the heat exchange surface should not be dirty or fouled	Continue to Step 5	Condenser dirty	Clean the condenser if necessary, replace it: Op. 5040A40
5	HECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'