Webasto FCF 10 Installation And Operation Manual - page 27
27
FAULT
POSSIBLE REASON
CORRECTION
No Heating
Reversing valve may be stuck.
Tap reversing valve lightly with rubber mallet while
unit is in heat mode, call for service if the problem
cannot be solved.
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, ducting 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, ducting must be as straight,
smooth and taut as possible.
Supply air is short-cycling,
Redirect supply air so that is not blowing into the
return air stream. Seal any air leaks on duct.
Seawater temperature is below 40oF
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 specific control
troubleshooting section,