Operation Manual

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L-2230 Troubleshooting
Fault: No heating.
Possible Reason/Correction
1. Unit is cool only, or if reverse cycle, 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.
Fault: Low airflow.
Possible Reason/Correction
1. Airflow is blocked.
Remove any obstructions in return air stream. Clean
return air filter and grille. Check for crushed or
restricted ducting, ducting must be as straight,
smooth and taut as possible.
2. Fan Coil is iced.
See below.
Fault: Fan coil is iced.
Possible Reason/Correction
1. Thermostat set point is too low.
Raise set point.
2. Improper airflow.
Remove any obstructions in return air stream. Clean
return air filter and grille. Check for crushed or
restricted ducting, must be as straight, smooth and
taut as possible. See the Digital Controls Trouble-
shooting section below for reprogramming options.
3. Supply air is short-cycling.
Redirect supply air so that is not blowing into the
return air stream. Seal any air leaks on duct.
4. Humidity level too high.
Close hatches and doors.
5. When all else fails.
Switch air conditioning to heat until ice melts or use
hair dryer to melt.
Fault: Water coil is iced in the heating
mode.
1. Seawater temperature is below 40°F (4.4°C).
Shut down system to prevent damage to condenser.
Allow coil to defrost.
Fault: System runs continuously.
Possible Reason/Correction
1. Set point temperature is improperly set: too low
for cooling or too high for heating.
Raise or lower set point.
2. Porthole or hatches open.
Close all port holes and hatches.
3. Seawater temperature too high for cooling or to
low for heating.
Seawater temperature will directly affect the air
conditioning unit's efficiency. This air conditioning
unit can effectively cool your boat in water tempera-
tures up to 90°F (32.2°C) and heat (if reverse cycle
option is installed) in water as low as 40°F (4.4°C).
4. Improper air sensor location.
Check your specific control troubleshooting section.
3.02 Digital Controls Troubleshooting
Fault: Digital display panel is not lit.
Possible Reason/Correction
1. 8-pin display cable plugs are not making
contact (unplugged, dirty, bent, or broken
pins).
With POWER OFF at the circuit breaker, remove
connector and inspect. If damaged, replace connec-
tor or entire display cable.
Fault: Fan is not running or runs
continuously.
Possible Reason/Correction
1. Digital control is programmed for either fan
cycling with compressor or continuous fan
operation.
Press and hold the Fan Button for five seconds to
change to "con" so fan will stay on continuously or to
"CYC" so the fan cycles with the compressor.
Note: After the compressor cycles off, the fan will
continue to run for two minutes in cool mode and
four minutes in Heat Mode regardless of parameter
setting.