No.
Fault code
Fault
Cause/Remedy
5
4
3
2
1
20
●
∘
●
∘
∘
Overtemperature cut-
out of the heat exchan-
ger of the internal de-
vice
...
(N/A)
24
●
●
∘
∘
∘
EEPROM not updated
Unit operates with ROM
parameters; no change of
the unit settings (fan, tem-
perature etc.) possible.
Replace the controller of the
internal device.
25
●
●
∘
∘
●
EEPROM faulty
26
●
●
∘
●
∘
Poor communication
Check the electrical con-
necting cable between the
internal device, the external
unit and earth
27
●
●
∘
●
●
Utilisation of EEPROM
data
No fault
28
●
●
●
∘
∘
Model A
29
●
●
●
∘
●
Model B
30
●
●
●
●
∘
Model C
31
●
●
●
●
●
Model D
●
Cooling and heating LEDs illumi-
nate together
∘
Only the heating LED illuminates
Fault codes, external unit, type OS303H, OS304H and OS305H
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.
Diagnosis
(cont.)
17
Troubleshooting
5692
687
GB
Содержание Vitoclima 300-S
Страница 40: ...Type OS307H A Control PCB B Power supply PCB External units cont 40 Connection and wiring diagrams 5692 687 GB ...
Страница 54: ...54 5692 687 GB ...
Страница 55: ...55 5692 687 GB ...