page no. 30 of 36
Vision Maxi
User Instructions Doc Ref M609 issue 1.0 June 2021.
TROUBLESHOOTING
4.1 Troubleshooting table
In the even of a malfunction, please refer to the following
table. If, after performing the suggested checks, the problem
is not solved, please contact the authorised technical
assistance.
Anomalies
Possible causes
Remedies
The appliance doesn’t switch on
No power supply
Check there is power supply (by turning a light on, for example).
Check that the thermal-magnetic circuit breaker used exclusively to protect the appliance has not been tripped
(if it has, reset it). If the problem repeats immediately, please call the Service Centre and avoid trying to make
the appliance work.
Remote control batteries have run out
Check that the appliance can be turned on using the touch-screen display and substitute the batteries.
The appliance does not cool/heat
adequately.
The temperature set is too high or too low.
Check and, if necessary, adjust the temperature setting on the remote control
The air filter is clogged
Check the air filter and clean it if necessary
Check that there are no other obstacles to the air flow both inside
and outside.
Remove anything that might block the air flow.
The heating and cooling load has increased (for example, a
door or a window has been left open or an appliance has been
installed in the room which generates a lot of heat).
Try to reduce the heating and cooling load of the room following instructions below:
Cover large windows exposed to sunlight with curtains or with external maskings (blinds, porches, reflecting
films, etc.);
The air conditioned room must remain closed for as long as possible;
Avoid turning on halogen lamps or other high energy consumption appliances such as small ovens, steam
irons, hot plates etc.).
Displayed faults
In the event of a malfunction, the display shows an alarm
code. The appliance still retains some functions (see the
OPERATION column).
Alarm
Cause
Function
E1
Faulty room temperature RT sensor
It is possible to normally activate the Cooling, Dehumidification and Heating modes. Regulation only monitors internal battery
anti-frost
E2
Faulty internal coil IPT sensor
None of the modes can be activated.
E3
Faulty outside temperature OT sensor
None of the modes can be activated.
E4
Faulty external coil OPT sensor
It is possible to normally activate the Cooling, Dehumidification and Heating modes.The control performs defrosting cycles at fixed
times.
E5
Faulty internal fan motor
None of the modes can be activated.
E6
Faulty external fan motor
None of the modes can be activated.
E7
Lack of communication with the display *
None of the modes can be activated.
E8
Compressor discharge probe failure *
None of the modes can be activated.
CP
Open CP contact
The appliance only works if the contact is closed. Check that the clamps are connected.
OF
Maximum level float intervention
During cooling and dehumidification, electronics keeps the water distribution system active with the battery - together with the fan
- to disperse excess water in the container. During heating, condensation should drain freely through the specific pipe. In the event of
an alarm, check that the condensation pipe is not bent or obstructed, thus preventing the water from flowing out.
* for DC Inverter models: lack of communication between the main, power, driver or display boards
The only way to resolve the problem is to disconnect and reconnect the power to the unit. If the alarm
persists, contact your Technical Assistance Centre.
4.3 Diagnosis of possible anomalies
If the conditioner blocks because of an alarm (see following
table), please communicate to the assistance centre the code
on the display to facilitate interventions.
