Setting vacuum, Way digital valve body configuration, Closed = open – Mastercool 90413 4-way Valve Digital Manifold User Manual

Page 4: Diagnostic configuration, Vacuum configuration, Diagnosing the system pressure and temperature

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AUTO-OFF

• Next AUTO-OFF will display.
Press the

SELECT button to disable Auto-Off [auto-off will clear from the display.]

If the auto-off feature is displayed the manifold will shut down after 15 minutes. Press
the

ON/OFF button to turn the unit back on and allow 15-20 seconds to initialize.

NOTE: It is recommended to keep the auto-off feature enabled to save the life of

the battery.

SETTING VACUUM

• Connect the vacuum sensor cable to the
manifold and turn the unit on.
• Press the

VACUUM button. This will

phase out the temperature display and
only show the vacuum units.
• Press the

SELECT button until the

desired vacuum unit is displayed.
• Press

ENTER to conﬁrm.

Fig. A

• The vacuum display will automatically go off after 15 minutes.
Press the

ON/OFF button and VACUUM button to turn the unit on. Allow 30-45

seconds for the sensor to warm up and the correct vacuum reading to appear.
(

If pressure, temperature or deep vacuum is being used for an extended period

of time turn the unit off and turn back on again when

reading is required.)

NOTE: (SEE FIG. A) To disconnect the vacuum sensor cable be sure to press the
release latch under the connector cable. Pulling on the cable without disengaging
the latch will cause damage and is not replaceable under warranty.

4-WAY DIGITAL VALVE BODY CONFIGURATION

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= CLOSED

= OPEN

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DIAGNOSTIC CONFIGURATION

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VACUUM CONFIGURATION

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CHARGING CONFIGURATION

IMPORTANT NOTES FOR SERVICING AC/R SYSTEM

A system that has been opened or one that is found to be excessively low on refrigerant
pressure as a result of a leak, must be fully evacuated by means of recovery/recycling and
deep vacuum. A system that has been evacuated must be repaired, leak tested and
evacuated again before charging.

DIAGNOSING THE SYSTEM PRESSURE AND TEMPERATURE

1. Make sure all valves on the manifold are closed.
2. Connect the blue and red hose from the low and high side of the manifold to the system.

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This manual is related to the following products:

99972 4-way Valve Digital Manifold, 99961 4-way Valve Digital Manifold, 99903_99903-2 4-way Valve Digital Manifold

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