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Electronic Expansion Valve Test (EEV) : On Multi-Zone Systems Look For CN802 Use Pin 3 For DC Ground

The document provides instructions for testing an electronic expansion valve (EEV) by using a multi-meter to check the ohms reading according to a provided chart. It also describes how to test for 12 volts DC output from the control board on multi-zone systems by checking pin 3 for DC ground and verifying a voltage read of 12-13 volts DC when testing the six solder points on the board.

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Mario Fernandes
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2K views1 page

Electronic Expansion Valve Test (EEV) : On Multi-Zone Systems Look For CN802 Use Pin 3 For DC Ground

The document provides instructions for testing an electronic expansion valve (EEV) by using a multi-meter to check the ohms reading according to a provided chart. It also describes how to test for 12 volts DC output from the control board on multi-zone systems by checking pin 3 for DC ground and verifying a voltage read of 12-13 volts DC when testing the six solder points on the board.

Uploaded by

Mario Fernandes
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Electronic Expansion Valve Test

(EEV)
To ohm out the expansion valve,
set your multi-meter to ‘ohms’ and
conduct the tests using the chart.

6-wire

5-wire

Checking for 12
volts DC output On Multi-zone systems
from Control Board Look for CN802
Use Pin 3 for DC Ground
Find and use a DC ground on
the main control board.

2. Test on all six solder points on the


board and verify voltage reads
12-13 volts DC.

Tech-Tip #020
Rev. Date 9/25/12

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