CTM Marine Self-Contained CT Installation & User Manual
19
Troubleshooting
Always refer to the user manual of your digital control for troubleshooting as well.
PROBLEM
POSSIBLE CAUSE
POSSIBLE SOLUTION
System won’t start
EV handler circuit breaker is
OFF.
Turn circuit breaker ON at the main vessel’s
panel.
Wrong wiring terminal strip
Check the wiring diagram and make the
necessary corrections
Input-line Voltage is
insufficient.
Check power source, either shore or generator
power for proper voltage. Check wiring terminals
for proper sizes and connections. Verify with a
volt-meter that power at the unit matches the
power source’s voltage.
Fan is not running
Refer to the troubleshooting section of your digital control manual
Unit is not cooling
Temperature set point.
Lower temperature to desired temperature on
display control.
Obstructed seawater flow
Clean seawater strainer, check for any
obstructions at scoop thru-hull inlet, and check
for good steady flow from overboard discharge.
Seawater pump may be air- Remove hose from pump discharge to purge air
locked
from line.
Loss of refrigerant gas
Check unit for leakage and call an certified
technician.
Seawater temperature to
high for cooling.
Seawater temperature will directly affect the
efficiency of your unit. Your unit will effectively
cool your boat with seawater temperatures up to
90ºF (32.2ºC).
Fan coil is iced
Refer tot he troubleshooting section of your
digital control manual
Fan is not running
Refer tot he troubleshooting section of your
digital control manual
Seawater Plumbing is air-
locked
Make sure the seawater plumbing system is
properly installed per the instructions in this
manual.
High-Pressure Switch is
open due to improper
seawater flow
Strainer or intake may be plugged, seacock may
be closed. Check seawater hose for kinks or
collapses. Verify pump operation.
