Install the manifold gauge set .

Connect the three 1.5 V dry cell batterie's positive (+) lead to terminal 3 and the negative (-) lead to terminal 1. Then connect the voltmeter's positive (+) lead to terminal 2 and the negative (-) lead to terminal 1. Measure the voltage.

• OK:
• The voltage changes according to refrigerant pressure, as shown in the graph.

If the voltage is not as specified, replace the pressure sensor.

Install the manifold gauge set .

Connect the three 1.5 V dry cell batterie's positive (+) lead to terminal 3 and the negative (-) lead to terminal 1. Then connect the voltmeter's positive (+) lead to terminal 2 and the negative (-) lead to terminal 1. Measure the voltage.

• OK:
• The voltage changes according to refrigerant pressure, as shown in the graph.

If the voltage is not as specified, replace the low pressure sensor.