Marine Air Systems vector compact - General Troubleshooting Guidelines

GENERAL TROUBLESHOOTING GUIDELINES
Also see specific a/c control troubleshooting sections following these general guidelines.
FAULT
Will not start.
Fan is not
running.
No cooling or
heating.
No heating.
POSSIBLE REASON
A/C circuit breaker is off.
Control is not turned on.
Wrong wiring at terminal strip.
Push-on butt connectors
became disconnected during
installation.
Input line voltage is
insufficient.
Check your specific control
troubleshooting section.
Temperature set point is above
(in cooling) or below (in
heating) ambient temperature.
Obstructed seawater flow.
Seawater pump may be air-
locked.
Loss of refrigerant gas.
Seawater temperature too high
for cooling or too low for
heating.
Coil is iced (in cooling).
Fan is not running.
Pressure switch or thermal
overload opened.
Unit is "cool only" not reverse
cycle.
CORRECTION
Turn circuit breaker on at ship's panel.
See control operation section in this manual.
Check wiring diagram and correct if necessary.
Disconnect power supply and open electric box,
check wiring diagram, correct if necessary.
Check power source (shore/generator) for
proper voltage. Check wiring and terminals for
proper sizes and connections.
Lower or raise set point
Clean seawater strainer. Check for obstructions
at speed scoop thru-hull inlet. Check for a good
steady flow from the overboard discharge.
Remove hose from pump discharge to purge air
from line.
Check a/c unit for refrigerant oil leakage, call
service technician (see back of manual).
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.
See below.
See below.
Check your specific control troubleshooting
section.
Install optional electric heat; contact your dealer
for details.
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