EN
Troubleshooting
MCS T6, MCS T12, MCS T16
26
No cooling or heating
(contn’d).
Fan coil is iced (in cooling).
See below.
Fan is not running.
See corresponding section in “Con-
trol Panel Troubleshooting” on
page 30.
Seawater plumbing is air-locked.
Ensure that seawater plumbing is
installed per the guidelines in the
Installation Manual
.
The Marine Climate System is pro-
grammed for Cool or Heat only, or
mechanical control thermostat is
rotated too far towards either Cooler
or Warmer setting.
Set P-1 to the desired value or rotate
the mechanical control thermostat.
High pressure switch open (in cool-
ing) due to improper seawater flow.
Strainer or intake may be plugged,
seacock may be closed.
Check seawater hose for kinks or col-
lapses.
Verify pump operation.
Check pump circuit breaker if appli-
cable.
High pressure switch open (in heat-
ing) due to improper airflow.
Remove any obstructions in return air
stream.
Clean return air filter and grille.
Check for crushed or restricted duct-
ing (ducting must be as straight,
smooth and taut as possible).
High-pressure switch is open in heat-
ing mode.
System may cycle on high-pressure if
seawater temperature is above
12.8 °C (55 °F).
Compressor’s thermal overload is
open due to either of the above rea-
sons.
Compressor needs to cool down.
Turn system off for a while (it may take
up to three hours to reset thermal
overload).
No cooling
Control panel may not be in “cool”
position.
Reset control panel.
Coil iced.
See below.
No heating.
Unit is “cool only”, or if reverse cycle,
reversing valve may be stuck.
Tap reversing valve lightly with rub-
ber mallet while unit is in heat mode.
Call for service if that does not cor-
rect the problem.
Problem
Possible Reason
Solution
MCS-6-12-16--O-West.book Seite 26 Dienstag, 14. November 2017 11:28 11
Summary of Contents for MCS T12
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