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Problem
The fan is not blowing or does not stop blowing.
The mode icon is flashing.
The filter warning displays.
Fault: Return Air Sensor Failure
Fault: Suction Temp Sensor Failure
Fault: Discharge Pressure Transducer Failure
Fault: High Discharge Pressure
Fault: Low Suction Pressure
Fault: Compressor Start Failure
Fault: Low Superheat
Fault: Low Suction Temperature
Fault: Clock Board Fault or Not Connected
Fault: AC Low Voltage
Possible cause
An electrical part has failed.
The Fan Operate mode is set for either Cycled or Continuous.
An electrical part has failed.
The compressor cycled off because the mode was changed.
The compressor cycled off because the target temperature
was exceeded by 1 °F (0.6 °C) or more.
The timer setting to clean or replace the air filter has been
reached.
An electrical connection or part has failed.
An electrical connection or part has failed.
An electrical part has failed.
The flow of seawater is obstructed or blocked.
The seawater pump may be be airlocked.
The seawater pump is not running.
The condensing coil is dirty.
The seawater temperature is too high during heating opera-
tion.
There is insufficient return airflow.
The return air pressure is too low during cooling operation.
The return air is restricted.
The seawater temperature is too low during heating opera-
tion.
The system has lost refrigerant
The supply voltage is too low.
An electrical part has failed.
A blower or expansion valve has malfunctioned.
A blower or expansion valve has malfunctioned.
An electrical part has failed.
The supply voltage is too low.
Suggested remedy
Contact a qualified service technician.
On the Parameters menu, change the Fan Operate Mode to
the desired setting.
Contact a qualified service technician.
The compressor will cycle back on three minutes after the
mode change.
The compressor will cycle on once the cabin temperature no
longer exceeds the set point.
1.
Clean or replace the air filter.
2.
On the Parameter menu, use the Filter Hours Reset func-
tion to reset the timer.
Contact a qualified service technician.
Contact a qualified service technician.
Contact a qualified service technician.
1.
Verify that the seacock is open and water if flowing to the
pump.
2.
Clean the seawater strainer.
3.
Check for a strong, steady flow from the overboard dis-
charge.
1.
Verify that the seawater plumbing is installed according
to the instructions in the installation manual included with
the air conditioner.
2.
Remove the hose from the pump discharge to purge air
from the line, then place the hose again.
1.
Ensure the pump is not damaged from being run dry.
2.
Verify that the pump is receiving voltage.
3.
Check that water is flowing strongly out of the overflow.
Clean the condensing coil.
Seawater temperature directly affects the unit's efficiency. For
the unit to heat (if the reverse-cycle option is available), the wa-
ter temperature must be less than 65 °F (18.33 °C).
1.
Remove any obstructions in the return air stream.
2.
Clean the air filter and the grille.
3.
Check for crushed or restricted ducting.
The ducting must be as straight, smooth, and firmly sup-
ported as possible.
The ambient temperature directly affects the unit's efficien-
cy. For optimum cooling, the air temperature must be 65 °F
(18.33 °C) or higher.
1.
Remove any obstructions in the return air stream.
2.
Clean or replace the air filter and grille.
Seawater temperature directly affects the unit's efficiency. For
the unit to heat (if the reverse-cycle option is available), the wa-
ter temperature must be 40 °F (4.44 °C) or higher.
Contact a qualified service technician.
1.
Verify the voltage is correct at the power source.
2.
If the problem persists, contact a qualified service techni-
cian.
Contact a qualified service technician.
Contact a qualified service technician.
Contact a qualified service technician.
Contact a qualified service technician.
1.
Verify the voltage is correct at the power source.
2.
If the problem persists, contact a qualified service techni-
cian.
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