Manual Dometic Elite Control DX systems (page 17 of 24) (English)

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Elite Control Operations Manual Digital-Controls Troubleshooting

L-2230 ENGLISH 15

DIGITAL-CONTROLS TROUBLESHOOTING

See also “General Troubleshooting” on page 14.

Low airflow. 1. Airflow is blocked. 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.

2. Fan speed is set to Manual Low. If the fan speed is set to Manual Low, press and

release the Fan button until the desired fan speed and airflow are reached. If

automatic fan-speed control is desired, press and release the Fan button until the

indicator light next to the word AUTO is lit.

3. Fan Coil is iced. See below.

Fan coil is iced. 1. Thermostat set point is too low. Raise set point.

2. 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. See the “Digital-Controls Troubleshooting” on page 15

for reprogramming options.

3. Supply air is short-cycling. Redirect supply air so that is not blowing into the return

air stream. Seal any air leaks on duct.

4. Humidity level too high. Close hatches and doors.

5. When all else fails. Switch air conditioning unit to heat until ice melts or use hair

dryer to melt.

Water coil is iced in the

Heating Mode.

Seawater temperature is below 40°F (4.4°C). Shut down system to prevent damage to

condenser. Allow coil to defrost.

System runs continuously. 1. Set point temperature is improperly set: too low for cooling or too high for

heating. Raise or lower set point.

2. Porthole or hatches open. Close all port holes and hatches.

3. Seawater temperature too high for cooling or too low for heating. Seawater

temperature will directly affect the air conditioning unit’s efficiency. This air

conditioning unit can effectively cool your boat in water temperatures up to 90°F

(32.2°C) and heat (if reverse cycle option is installed) in water as low as 40°F (4.4°C).

4. Improper air sensor location. Check your specific control troubleshooting section.

Table 4: Digital-Controls Troubleshooting

PROBLEM POSSIBLE REASON/SOLUTION

Digital display panel is not

lit.

The 8-pin display-cable plugs are not making contact (unplugged, dirty, bent, or

broken pins). With POWER OFF at the circuit breaker, remove connector and inspect. If

damaged, replace connector or entire display cable.

Fan is not running or runs

continuously.

Digital control is set for either fan cycling with compressor or continuous fan

operation. Press and hold the Fan button for five seconds to change the fan operation to

cycled (“CYC”) or continuous (“con”). Note: When configured for electric heat, after a heat

cycle ends the fan will stay on for 4 minutes even if the fan is set to cycled operation.

Fan is not running but the

compressor is.

Failed triac on circuit board. Send for repair or call local service technician.

Fan runs continuously

although it is set to cycle

with compressor.

Failed triac on circuit board. Send for repair or call local service technician.

Table 3: General Troubleshooting (continued)

PROBLEM POSSIBLE REASON/SOLUTION

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Dometic Elite Control DX systems Manual

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