Technical data
17 Diagnostic
With this feature is possible to have a visual signal that a trouble is occurring.
This mode is always active and the signalling is made through the display board LEDS
.
In case of no troubles the LEDS status follows its normal function.
The detected troubles are showed to the user/technician using the 3 leds of the receive
r
For each fault there are different effects upon the operation of the A/C:
NOTES
The troubles are shown according to a priority list that is, in case of more than on
e
trouble present, is always showed, at first, the one with the highest priority (1 2 3 etc).
Sensor damaged means a situation where sensor is short-circuited or opened.
In case of damaged sensors, the system (CM, FMO, FMI etc), if in OFF state, does not start.
Effects
LD1(tmr)
blu
LD2(stby)
org
LD3(opr)
grn
9 RAT probe damaged O F F
8 OAT probe damaged ● FF
7 ICT probe damaged F O F
6 OCT probe damaged F ● F
5 CDT probe damaged O F O
4 Compress. overcurrent O F ●
3 Compressor overtemp. ● FO
2 PFC fault ● F ●
1 Water level alarm O O F
See paragraph 20. DRAIN PUMP
O = LED off
F = LED blinking
● = LED on
* If a fault occurred, the unit can operate only in fan and fan heater mode. In these modes,
the fault signalling is suspended.
System does not operate in cool,
dry and heat mode*. As soon as
fault is cleared, system
automatically restarts after 3
minutes. During this time, the
signalling is showed.
Priority FAULT
LEDS status
Pagina 16