When the NetCol5000-A air conditioner was commissioned, Which statement about the possible cause of the "exhaust high pressure alarm" was wrong?

• A.Too little refrigerant charge
• B.Excessive refrigerant charge
• C.Outdoor fan cannot start
• D.Outdoor unit fan speed is too low

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What are the access control type of the micro module? (Multiple Choice)

• A.Fingerprint swipe access control machine
• B.Fingerprint password swipe access control machine
• C.Face recognition access control
• D.Password swipe access control machine

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