Marine Air Systems vector compact - Passport II Digital Control Troubleshooting Guidelines

GENERAL TROUBLESHOOTING GUIDELINES CONTINUED
FAULT
Low airflow.
Coil is iced.
System runs
continuously.
POSSIBLE REASON
Air flow is blocked.
Coil
is iced.
Thermostat set point is too low.
Improper air flow.
Supply air is short-cycling.
Seawater temperature is below
40°F.
Humidity level too high.
When all else fails.
Check your specific control
troubleshooting section.
Set point temperature is
improperly set: too low for
cooling or too high for heating.
Porthole or hatches open.
Seawater temperature too high
for cooling or too low for
heating.
Improper air sensor location.
CORRECTION
Remove any obstructions in return air stream.
Clean return air filter and grille. Check for
crushed or restricted ducting, ducting must be as
straight, smooth and taut as possible.
See below.
Raise set point.
Remove any obstructions in return air stream.
Clean return air filter and grille. Check for
crushed or restricted ducting, ducting must be as
straight, smooth and taut as possible.
Redirect supply air so that it is not blowing into
the return air stream. Seal any air leaks on duct.
Shut down system to prevent damage to
condenser. Allow coil to defrost (see below).
Close hatches and doors.
Switch a/c to heat until ice melts or use hair
dryer to melt ice.
Raise or lower set point.
Close all port holes and hatches.
Seawater temperature will directly affect the a/c
unit's efficiency. This a/c unit can effectively
cool your boat in water temperatures up to 90°F
and heat (if reverse cycle option is installed) in
water as low as 40°F. Switch to electric heat if
installed.
Check your specific control troubleshooting
section.
PASSPORT II DIGITAL CONTROL TROUBLESHOOTING GUIDELINES
FAULT
Passport II
display panel
is not lit.
POSSIBLE REASON
8-pin display cable plugs are
not making contact (unplugged,
dirt, bent, or broken pins).
CORRECTION
With POWER OFF at the circuit breaker,
remove connector and inspect. If damaged,
replace connector or entire display cable.
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