Fault codes external unit, type OS307H
Fault codes are illustrated through the simultaneous illumination of the cooling
and heating LEDs.
The heating LED illuminates 5 times in succession. Either the cooling LED illu-
minates at the same time or not.
This results in the fault code detailed in the following table:
Note
The fault code can also be checked at the LEDs of the external unit. Fault codes
are illustrated through the simultaneous illumination of the status and fault
LEDs. The status LED illuminates 5 times in succession. Either the fault LED
illuminates at the same time or not.
Note
Only one fault code will be displayed, even if several faults have occurred.
To display further fault codes:
&
Switch the unit OFF and isolate it from the power supply.
&
Remove the fault.
&
Call up the diagnostic function again.
No.
Fault code
Fault
Cause/Remedy
5
4
3
2
1
1
∘
∘
∘
∘
●
Temperature sensor of
the heat exchanger of
the external unit
Check sensor connection;
replace sensor
2
∘
∘
∘
●
∘
Compressor tempera-
ture sensor
3
∘
∘
∘
●
●
Processor temperature
sensor
4
∘
∘
●
∘
∘
Outside temperature
sensor
5
∘
∘
●
∘
●
Wet steam tempera-
ture sensor
6
∘
∘
●
●
∘
Suction gas tempera-
ture sensor
7
∘
∘
●
●
●
No feedback external
fan/compressor
Check the connections of the
external fan (voltage and ve-
locity sensor); check the fan
motor; check the compressor
connection and motor
Diagnosis
(cont.)
20
Troubleshooting
5692
687
GB
Содержание Vitoclima 300-S
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