6.1.1 ALARMS and troub/eshooting
In case of failure the following codes are shown on two digits display in the electrical box : El : Room temperature:
sensor failure;
E2 : Evaporator coil temperature: sensor failure; E3 : Seawater inlet temperature: sensor failure; E4 : Condenser
temperature: sensor failure; E5 : Indoor DC Fan failure;
E7: Communication errar between main MCU and room thermostat; LP: Low Pressure switch alarm;
HP: High Pressure switch alarm;
LT: low evaporator temperature in heating mode
In case of alarm from El to E7 please try to switch OFF the unit and then ON again, if the problem persists cali a Uflex
authorized service.
HP alarm in cooling mode could be due to obstructed seawater circuit, or to the seawater pump not working
properly (e.g. thermal load protection). Please check visually the seawater discharge overboard, and in case of
poor water flow, check and clean all the involved parts.
In case of HP alarm appears in heating mode, the air flow through the air outlet could be too low. Please check all
the ducts are not obstructed somewhere. Also, the air suction filter, if dirty. could cause high pressure, provide then
to clean it before restarting the unit.
LP alarm is most commonly due to a consistent leakage of refrigerant, check the refrigerating circuit for leakages.
In case of LT alarm, the problem could be due to poor seawater circulation or seawater temperature too low (below
5
°
C). Please check first the seawater flow as above specified.
7.0 WORKING LIMITS
The unit operates correctly within the following ranges:
✓ Summer cooling mode: 15
°
C < sea water temperature < 40
°
C
✓ Winter heating mode: 5
°
C < sea water temperature < 20
°
C
Should working conditions be out of these ranges, in your particular application, please contact Uflex
before installation in arder to find a suitable solution.
Localized situations: in some regions, it is common to experience a tremendous presence of jellyfish or
seaweed concentrateci in back bay marinas for some periods of time. This can clog strainers, water pumps
and heat exchangers in a little w hile, causing shut-down faults and sometimes equipment damage. In such
particular conditions. please seek for the advice of a locai Uflex service representative. Any possible
modification to the overall system (self-contained, pumps, strainers, etc.) that could overtake the problem
must be approved by Uflex, otherwise warranty coverage will expire.
The standard pump is not self-priming: any damage incurred due to a pump running dry is not covered
under warranty. Air conditioning system must be switched off, as well as pumps, whenever there is a risk of
pump loosing priming, due to particular seawater conditions relateci to the boot type and its speed. The
compressor could be damaged if the seawater flow through the heat exchanger is considerably reduced.
This air conditioning system is designed to work under normai operation conditions. Where failure or
malfunctions could lead to an abnormal operating condition that could cause injury or damage to any
equipment or other property, additional precautions must be designed into the contrai system. Other
lnstruction manual
Pag. 19 of 28
Date 2019-12-20
