Will not start | A/C circuit breaker is off | Turn circuit breaker on at ship’s panel, |
| Display control is not turned on. | Check wiring Diagram and correct if necessary. |
| Incorrect wiring at terminal strip. | Disconnect power supply and open electric box, check wiring diagram, correct if necessary. |
| Push-on butt connectors pulled apart during installation. | Check power source (shore/generator) for proper voltage. |
| Input line voltage is insufficient, | Check wiring and terminals for proper sizes and connections. |
Fan not running. | Check your specific control Troubleshooting section | |
No cooling or heating | Temperature set point is above (in cooling) or below (in heating) ambient temperature | Lower or raise set point. |
| Obstructed seawater flow. | Clean seawater strainer. Check for obstructions at speed scoop thru-hull inlet. Check for a good steady flow from the overboard discharge. |
| Seawater pump maybe air-locked. | Remove hose from pump discharge to purge air from line |
| Loss refrigerant gas. | Check a/c unit for refrigerant oil leakage, call service technician. |
| Seawater temperature too high for cooling or too low for heating. | Seawater temperature will directly affect a/c unit’s efficiency. This a/c unit can effectively cool your boat in water temperature up to 90°F and heat (if reverse cycle option is installed) in water as tow as 40°F. |
| Coil is iced (in cooling) | |
| Fan is not running. | |
| Pressure switch or thermal overload opened. | Check you specific control troubleshooting section. |
No Heating | Unit is “cool only”, or stuck in reverse cyde. Reversing valve may be stuck. | Tap reversing valve lightly with rubber mallet while unit is in heat mode, Call for service if that does not correct the problem |
Low air flow | Air flow is blocked | Remove any obstructions in return air stream, Clean return air filter and grille. Check for crushed or restricted ducting, duding must be as straight, smooth and taut as possible. |
| Coil is iced | See below. |
Coil is iced | Thermostat set point is too low | Raise set point. |
| Improper air flow | Remove any obstructions in return air stream. Clean return air filter and grille. Check for crushed or restricted ducting, duding must be as straight, smooth and taut as possible. |
| Supply air is short-cyding. | Redirect supply air so that is not blowing into the return air stream. Seal any air leaks on duct. |
| Seawater temperature is below 40°F | Shut down system to prevent damage to condenser. Allow coil to defrost (see below). |
| Humidity level too high. | Close hatches and doors. |
| When all else fails. | Switch a/c to heat until ice melts or use hair dryer to melt. |
| Check your spedfic control troubleshooting sadiron. | |
System runs continuously. | Set point temperature is improperly set: too low for cooling or too high for heating. | Raise or lower set point. |
| Porthole or hatches open. | Close all port holes and hatches. |
| Seawater temperature too high for cooling or to low for heating. | 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. |