Vertical Exposed Fan Coil Unit
22
(11) Factory data reset
All parameters (3.3.8) can be reset to factory defaults.
As shown in the Figure 17, on the parameter setting page, press (MODE) to switch the option
number to 11.
(UP) or
(DOWN) is provided to allow a switch between ON and OFF.
Figure 17
3.4 Ambient temperature sensor failure
As shown in the Figure 18, if the ambient temperature sensor fails to work, the screen will not display
the ambient temperature or the set temperature but “F5”. In this case, the unit continues to work at 24°C,
an ambient temperature. The user is allowed to adjust the set temperature.
Figure 18
No.
Code
Description
1
F5
Indoor ambient temperature sensor failure
3.5 Failure handling
The product maintenance is performed by qualified technicians only.
Status
Maintenance approaches
Start-up failure
1. Check if L/N lines work well and wiring is safe.
2. Check if ON/OFF key is effective.
3. Try to replace the main control panel first. If it does not
work, replace the power panel.
Unrecognizable code on the LCD
Loosen the fixing screws as the panel is not fitted properly.
Blown fuses
1. Check if wiring is correct.
2. Replace the power panel.
Abnormal output with a normal display
Try to replace the main control panel first. If it does not work,
replace the power panel.
