Instruction manual
Pag. 20 of 28
Date 2021-07-27
6.1.1 ALARMS and troubleshooting
In case of failure the following codes are shown on two digits display in the electrical box:
E1
：
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 error 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 E1 to E7 please try to switch OFF the unit and then ON again, if the problem persists call a
INNOVA authorized service.
The HP alarm in cooling mode could be due to a clogged source circuit, or the pump not working properly (e.g.
thermal load protection). Please visually check the overboard drain, and in case of poor water flow, check and clean
all parts involved.
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 may be due to poor water circulation on the source side or too low water
temperature (below 5°C). Please check the seawater flow first as specified above.
7.0
WORKING LIMITS
The unit operates correctly within the following ranges:
✓
Summer cooling mode: 15°C < source-side temperature< 40°C
✓
Winter heating mode: 10°C < source-side temperature < 20°C
Should working conditions be out of these ranges, in your particular application, please contact INNOVA
before installation in order to find a suitable solution.
7.1
Recommendations for sources with sea, lake or river water
Localized situations: in some regions, it is common to experience a tremendous presence of jellyfish or
seaweed concentrated in back bay marinas for some periods of time. This can clog strainers, water pumps
and heat exchangers in a little while, causing shut-down faults and sometimes equipment damage. In such
particular conditions, please seek for the advice of a local INNOVA service representative. Any possible
modification to the overall system (self-contained, pumps, strainers, etc.) that could overtake the problem
must be approved by INNOVA, 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 related to the boat type and its speed. The
compressor could be damaged if the seawater flow through the heat exchanger is considerably reduced.