Troubleshooting; General Troubleshooting - Dometic MCS6 Bedienungsanleitung

MCS6, MCS12, MCS16
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Troubleshooting

9.1

General Troubleshooting

Problem
System will not start.
Fan is not running.
No cooling or heating. Temperature set point is satisfied. Lower or raise set point.
EN
Possible Reason
Air conditioning unit circuit
breaker is off.
Control is not turned on.
Wrong wiring at terminal strip.
Push-on butt connectors became
disconnected during installation.
Input line voltage is insufficient.
–
Obstructed seawater flow.
Seawater pump may be air-
locked.
Loss refrigerant gas.
Seawater temperature too high
for cooling or too low for heating.
Troubleshooting
Solution
Turn circuit breaker on at ship's
panel.
Turn control on.
Check wiring diagram and correct
if necessary.
Disconnect power supply and
open electric box.
Check wiring diagram, correct if
necessary.
Check power source (shore/gen-
erator) for proper voltage.
Check wiring and terminals for
proper sizes and connections.
Verify with a volt-meter that the
power at the unit is the same as
the power source.
See corresponding section in
"Control Panel Troubleshooting"
on page 27.
Clean seawater strainer.
Check for obstructions at speed
scoop thru-hull inlet.
Check for a good steady flow
from the overboard discharge.
Remove hose from pump dis-
charge to purge air from line.
Check air conditioning unit for
refrigerant oil leakage.
Call service technician.
Seawater temperature will
directly affect air conditioning
unit's efficiency.
This air conditioning unit can
effectively cool your boat in water
temperature up to 90 °F (32.2 °C)
and heat in water temperatures
as low as 40 °F (4.4 °C).
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