Halcyon Multifunction Compensator, Owner'S Manual

16

Pre-Dive MC System Inspection

Before each use, the MC must be given a thorough visual inspection and functional test. Never dive 
with a MC that shows signs of damage to its bladder or valving until it has received a complete in-
spection and service from an Authorized Halcyon Dealer.

Inspection Checklist

1. Connect the wing’s power inflator to a clean air source, via the LP quick disconnect hose. Depress 
and release the inflator button intermittently to ensure that the airflow is unobstructed, and that 
the airflow stops completely when the button is released.

2. Manually operate the overpressure (OP) valve by pulling on the attached string to test spring and 
valve integrity. Fully inflate the buoyancy wing until the OP valve opens. Examine the operation of 
the OP valve by repeatedly inflating the wing to ensure that the valve opens to relieve excess pres-
sure, yet closes immediately afterward to allow the bladder to remain taut and fully inflated.

3. Check the function of the oral inflator button, rapid exhaust valve, and overpressure/manual 
dump valve to ensure a rapid and unobstructed exhaust from each valve. Listen closely for any leak-
age with the wing fully inflated but not connected to a low pressure air source. If there is any suspi-
cion of leak, submerge and once equalized to depth check for continued bubbling. 

WARNING: 

If any leakage can be heard, or if the bladder begins to deflate within 5-10 min-

utes, 

DO NOT

 attempt to use the MC until it has received factory prescribed service from an 

Authorized Halcyon Dealer.

4. Make a final check of tension of both cam straps on the SCUBA cylinder to ensure that they have 
not loosened due to stretching. Retighten if necessary.

5. Before entering the water, check both ACB system pockets to ensure that they are correctly fas-
tened to the MC with the Fastex buckles.

WARNING: 

Loss of the ACB System pockets can occur if the buckles are not securely 

latched. Unintentional release of both weight pockets underwater may lead to an uncon-
trolled ascent, and could result in serious injury or death.