Cruisair Air Conditioner Troubleshooting

Cruisair Marine Air Conditioner Troubleshooting

Trouble	Probable Cause	Symptoms	Remedy
Compressor fails to start	Power source failure	No current at power source	Check for tripped circuit breaker
	Faulty switch assembly	No current at condensing unit terminal strip	Check for faulty switch
	Low voltage	Compressor tries to start & then cuts off	Correct power source
	Faulty high pressure switch	Voltage to switch but no voltage between the switch and compressor	Replace high pressure switch
	Faulty compressor	Unit draws locked rotor amp. (locked rotor amp found on data plate)	Replace compressor
Compressor cycles every 15 to 30 seconds	Low voltage	Compressor's thermal overload opens	Correct power source
	Incorrect refrigerant charge	Excessive head pressure
	Restricted condenser air flow	Excessive head pressure. High pressure switch opens	Correct condenser air flow
	High pressure switch incorrectly set	Switch opens before 425 psig head pressure	Replace high pressure switch
System not cooling	Switch assembly not set properly or thermostat satisfied	Ventilation operation only	Set switch and thermostat at correct selection
	No or restricted air flow	Compressor cycles quickly	Check for restricted condenser air flow
	System low on refrigerant	Compressor suction line warm	Check refrigerant charge
	Thermostat satisfied	Compressor runs for short time and then cycles off	Reset thermostat to desired level. Calibrate if necessary
Iced cooling unit	Restricted air flow	Restricted discharge air flow	Clean return air filter & check for airflow restrictions
	Low refrigerant charge	Compressor suction line warm	Check refrigerant charge
Blower or fan motor inoperative	Power source failure	No current at power system	Check for tripped circuit breaker
	Low voltage	Hot motor. Motor thermal'electric protector open	Check power source
	Faulty switch assembly	No power to motor	Replace faulty switch
Cooling unit throwing water out of discharge grill	Blocked or restricted condensate drain	Excessive water out of discharge grill	Check for condensate drain restrictions

Cruisair FCF 5,000 Air Conditioner Troubleshooting

FAULT	POSSIBLE REASON	CORRECTION
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.