Operation of the Digital Control Panel
EnviroComfort Installation Manual
16
L-2657 ENGLISH
OPERATION
O
PERATION
OF
THE
D
IGITAL
C
ONTROL
P
ANEL
Refer to the separate
Dometic Digital Control Operations Manual
for full operating instructions.
I
NITIAL
S
TARTUP
1.
Ensure seawater intake ball valve (seacock) is open.
2.
Make sure the control is powered OFF.
3.
Turn on air conditioning unit circuit breaker. If the seawater pump has its own circuit breaker, turn that on too.
4.
Press the Fan button. Verify that the fan is running and that there is steady airflow out of the supply-air grille.
5.
Select a temperature set point lower than the current cabin temperature. This starts the compressor and seawater
pump.
6.
Check for a steady solid stream of seawater from the overboard discharge.
O
VERVIEW
Power On
– Press the Power button once to engage the system. The display indicates room temperature when the system is
on and is blank when the system is off.
Set Temperature
– Press the Up or Down button to set the desired room temperature. The set point can be viewed by
momentarily pressing and releasing the Up or Down button.
Fan Speed
– Fan-speed operation is automatic, allowing fan speed to decrease as the set point temperature is approached in
the Cool Mode. The fan operates at low speed when set point is satisfied. Use the Fan button to select manual fan speeds.
You can program the fan to run only when cooling or heating is required. Normally the automatic fan-speed operation is
reversed in the Heating Mode, however, the fan can be programmed to operate the same as in the Cooling Mode.
Memory
– The control’s nonvolatile memory requires no batteries or backup power. When power is lost, the operating
parameters are retained indefinitely. When power is restored, the control resumes operating as last programmed.
T
ROUBLESHOOTING
G
UIDELINES
Before you call for service, review this list. It may save you time and expense. This list contains common occurrences that are
not a result of defective workmanship or materials. If you need service after trying these procedures, call your nearest Dometic
dealer.
NOTE
Do not turn the digital control off and immediately turn it back on. Wait at least 30 seconds for system refrigerant
pressures to balance, otherwise the breaker will trip.
Table 3: General Troubleshooting Guidelines
PROBLEM
POSSIBLE REASONS & SOLUTIONS
System will not start.
1.
Air conditioner circuit breaker is off.
Turn circuit breaker on at ship’s panel.
2.
Wrong wiring at terminal strip.
Check wiring diagram; correct if necessary.
3.
Input-line voltage is insufficient.
Check power source for proper voltage. Check
wiring and terminals for proper sizes and connections.
No cooling.
1.
Selector knob may not be in “cool” position.
Reset selector knob.
2.
Temperature set point is above ambient temperature.
Lower temperature
setting.
3.
Obstructed water flow.
Clean seawater strainer. Check for good steady flow from
overboard discharge.
4.
Pump may be air locked.
Remove hose from pump discharge to purge air from
line.
5.
Coil iced.
See below.
Summary of Contents for EnviroComfort ECD
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