Maintenance - Dometic MCS5 Notice D'utilisation

_BA_MCS.book Seite 31 Donnerstag, 2. April 2009 9:56 09
MCS5, MCS15
Problem
"LPF" (Low Freon
Pressure) is
displayed.
"PLF" (Low Pump
Flow) is displayed.
10

Maintenance

10.1 Reversing Valve
The reversing valve must be energized periodically to keep the internal parts
moving freely.
Switch the air conditioner unit into heat for a few seconds once a month.
10.2 Seawater Strainer
Ensure that your pump receives adequate seawater flow by regularly
cleaning the strainer basket.
Periodically check the overboard discharge for a steady stream of water.
Check seawater intake speed scoop for obstructions.
Make sure hoses are not looped, kinked or crushed.
Possible Reason
Low-pressure switch is open due
to low seawater and/or low return
air temperatures.
Low pressure switch is open due
to loss of refrigerant.
Condenser coil is too hot.
Thermistor is damaged.
Damaged jack/socket on circuit
board.
Maintenance
Solution
Try restarting the air conditioning
unit, the optional low pressure
switch has a ten minute shut-
down time delay that may be in
affect.
Check air conditioning unit for
refrigerant oil leakage.
Call service technician.
Verify that unit is getting water
flow, and that condenser is not
fouled.
Unplug water sensor if installed.
Try another if it is available.
Visually check to see that pins
inside socket are not bent or cor-
roded.
Repair or replace circuit board if
needed.
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