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Dometic Elite Control DX systems Manual

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General Troubleshooting Elite Control Operations Manual
14 L-2230 ENGLISH
TROUBLESHOOTING
GENERAL TROUBLESHOOTING
See also “Digital-Controls Troubleshooting” on page 15.
Table 3: General Troubleshooting
PROBLEM POSSIBLE REASON/SOLUTION
System will not start. 1. Air conditioner circuit breaker is off. Turn circuit breaker on at ship’s panel.
2. Digital control is not turned on. Turn on the control.
3. Wrong wiring at terminal strip. Check wiring diagram; correct if necessary.
4. Input-line voltage is insufficient. Check power source (shore/generator) 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.
5. Push-on connectors or butt splices became disconnected during installation.
Disconnect power supply and open electric box, check wiring diagram, correct if
necessary.
Fan is not running. Check “Digital-Controls Troubleshooting” on page 15.
No cooling or heating. 1. Temperature set point is satisfied. Lower or raise set point.
2. Obstructed seawater flow. Clean seawater strainer. Check for obstructions at speed
scoop thru-hull inlet. Check for a good steady flow from the overboard discharge.
3. Seawater pump may be air-locked. Remove hose from pump discharge to purge air
from line.
4. Loss of refrigerant gas. Check air conditioning unit for refrigerant oil leakage, call
service technician.
5. Seawater temperature too high for cooling or too low for heating. 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
(if reverse-cycle option is installed) in water temperatures as low as 40°F (4.4°C).
6. Fan coil is iced (in cooling). Check your specific control troubleshooting section.
7. Fan is not running. Check your specific control troubleshooting section.
8. Seawater plumbing is air-locked. Ensure that seawater plumbing is installed per the
guidelines in this manual.
9. Digital control is programmed for Cool or Heat only, or mechanical-control
thermostat is rotated too far toward either Cooler or Warmer setting. See digital
control manual for reprogramming or see mechanical control operation section in this
manual.
10. High-pressure switch is open (in cooling) 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. Check pump circuit breaker if applicable.
11. High-pressure switch is open (in heating) due to improper airflow. 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.
12. High-pressure switch is open (in heating) due to high seawater temperature.
System may cycle on high pressure if seawater temperature is above 55°F (12.8°C).
13. Compressor’s thermal overload is open due to either of the above reasons.
Compressor needs to cool down. Turn system off for a while (it may take up to three
hours to reset thermal overload).
No heating. Unit is "cool only", or if reverse cycle, reversing valve may be stuck. Tap reversing
valve lightly with rubber mallet while unit is in heat mode. Call for service if that does not
correct the problem.
… 16 …


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