Cruisair Air Conditioner Troubleshooting

Cruisair Marine Air Conditioner Troubleshooting

TroubleProbable CauseSymptomsRemedy
Compressor fails to startPower source failureNo current at power sourceCheck for tripped circuit breaker
Faulty switch assemblyNo current at condensing unit terminal stripCheck for faulty switch
Low voltageCompressor tries to start & then cuts offCorrect power source
Faulty high pressure switchVoltage to switch but no voltage between the switch and compressorReplace high pressure switch
Faulty compressorUnit draws locked rotor amp. (locked rotor amp found on data plate)Replace compressor
Compressor cycles every 15 to 30 secondsLow voltageCompressor's thermal overload opensCorrect power source
Incorrect refrigerant chargeExcessive head pressure
Restricted condenser air flowExcessive head pressure. High pressure switch opensCorrect condenser air flow
High pressure switch incorrectly setSwitch opens before 425 psig head pressureReplace high pressure switch
System not coolingSwitch assembly not set properly or thermostat satisfiedVentilation operation onlySet switch and thermostat at correct selection
No or restricted air flowCompressor cycles quicklyCheck for restricted condenser air flow
System low on refrigerantCompressor suction line warmCheck refrigerant charge
Thermostat satisfiedCompressor runs for short time and then cycles offReset thermostat to desired level. Calibrate if necessary
Iced cooling unitRestricted air flowRestricted discharge air flowClean return air filter & check for airflow restrictions
Low refrigerant chargeCompressor suction line warmCheck refrigerant charge
Blower or fan motor inoperativePower source failureNo current at power systemCheck for tripped circuit breaker
Low voltageHot motor. Motor thermal'electric protector openCheck power source
Faulty switch assemblyNo power to motorReplace faulty switch
Cooling unit throwing water out of discharge grillBlocked or restricted condensate drainExcessive water out of discharge grillCheck for condensate drain restrictions

Cruisair FCF 5,000 Air Conditioner Troubleshooting

FAULTPOSSIBLE REASONCORRECTION
Will not startA/C circuit breaker is offTurn 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 heatingTemperature set point is above (in cooling) or below (in heating) ambient temperatureLower 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 HeatingUnit 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 flowAir flow is blockedRemove 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 icedSee below.
Coil is icedThermostat set point is too lowRaise set point.
Improper air flowRemove 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°FShut 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.