Parker AQUA DUO A455C-2800, Technical Manual

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Another cause may be an air suction leak at or prior to the Booster Pump (suction line at
or prior to the Inlet of the Booster Pump). Within up to 10 minutes of operation, if the
Low-Pressure Gauge gradually decreases to near or below 6 PSI, check the inlet line and
associated components prior to the Boost Pump Inlet:
•
Sea strainer Mesh Screen clean all debris and check for air suction leak
•
Prefilter Elements replace
•
Plankton Filter Element clean debris from screen
•
Inlet Thru-Hull Fitting for debris, underneath the boat, and check for air suction leaks.
•
Sea cock Valve must be full open and checked for air suction leaks
•
No kinks or blockages in the inlet line and check for air suction leaks from each fitting.
•
Ensure that the Booster Pump is operational and delivering flow and pressure
4.
If system shuts down due to low or high pressure prematurely, then either the Low-
Pressure or the High-Pressure transducer may require adjustment or replacement. Refer to
High- and Low-Pressure transducer Troubleshooting as well as High- and Low-Pressure Gauge
Troubleshooting.
5.
System Shuts Down By Itself
Voltage may have been interrupted causing the system to shut down. Check Voltage at the
system inside the Control Panel. The system must receive adequate voltage at start up and
during operation in order for it to operate normally.
•
AC systems shut down by design when the voltage falls below 10% of the set voltage
Check power cable wire size from the power source to the system to ensure that it is not
undersized and causing voltage drop to the system. Check power cable wire connections
from the power source to the system to ensure that they are tight.
6.
System Shuts Down by Itself and does not Start when the "Start" switch is pressed
Check power source circuit breaker.
•
If the breaker has tripped and if this is a continual problem, check circuit breaker
amperage rating to ensure that the proper circuit breaker has been installed.
•
Occasionally a circuit breaker can be “weak” or defective causing premature trip.
•
Have a qualified electrician check the circuit breaker with a full rated load to test its integrity.
•
Check Power Wire Size to ensure that it is proper for the amperage rating of the
system. Undersize wire will cause voltage drop and increased current.
7.
System Shuts Down when the Operating pressure is less than 950 PSI
Inspect the pressure gauge orifice inside the High-Pressure Gauge port and dislodge debris
within the orifice by cleaning or opening the hole with a small drill bit 1/32-inch (1 mm)
diameter. Replace Gauge if necessary.