NANO VOLUME 1 & 2

HVAC

847

HVAC

VERIFYWHETHERMALFUNCTIONS

ARE INCOMPRESSOROILAMOUNT

AND A/C COMPRESSOR OR

ELSEWHERE

When engine is racing, does high-

pressure value increase?

VERIFYWHETHERMALFUNCTIONS

ARE INCOMPRESSOROILAMOUNT

ORA/C COMPRESSOR

After compressor oil is replenished

each 10 ml, does high-pressure value

increase?

VERIFYWHETHERMALFUNCTION IS

IN EXPANSION VALVE OR

ELSEWHERE

Is only refrigerant low-pressure value

high?

VERIFY THATAIRMIX IS INSTALLED

SECURELYAND PROPERLY

Are heater unit’s air mix links, air mix

cranks and air mix rods securely and

properly installed?

VERIFY THAT EXPANSION VALVE

HEAT-SENSING TUBE WITHIN

COOLING UNIT IS POSITIONED

SECURELYAND CORRECTLY

Is expansion valve heat-sensing tube

within cooling unit securely installed in

proper position?

VERIFY THAT MALFUNCTION

SYMPTOMOCCURSAFTERREPAIR

Does cool air blow out? ( Are results of

refrigerant system performance test

okay?)

Return to step 3.

Go to next step

Troubleshooting completed. ( Explain to

customer that cause was insufficient

compressor oil.)

Replace A/C compressor. (Cause is

defectiveAC compressor)

Go to step 20.

Go to next step

Repair or install links, cranks and rods

securely in proper position.

Replace expansion valve, then go to next

step.( Since valve opens too much,

replacement is necessary.)

Install heat-sensing tube securely in

proper position, then go to next step

Troubleshooting completed.

Explain repairs to customer.

Recheck malfunction symptoms, then

repeat from step 1 if malfunction recurs.

When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while

doing the inspection to discover whether poor contact points are cause of any intermittent malfunctions. If there

is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and

undamaged.

Yes

STEP INSPECTION

ACTION