Viessmann Vitoclima 300-S, Service Instructions Manual

Page: 21 / 56

No. Fault code Fault Cause/Remedy
5 4 3 2 1
8 ∘ ● ∘ ∘ ∘ Processor fault exter-
nal fan Overheating/overvoltage at
the external fan controller;
air inlet blocked; motor jum-
per incorrectly placed on the
external unit controller;
check external fan motor
9 ∘ ● ∘ ∘ ● External fan idle Check external fan motor
10 ∘ ● ∘ ● ∘ Max. speed of the ex-
ternal fan exceeded Wind-influenced excess air
inlet on the suction side; if
required, fit wind break; elec-
tromagnetic faults
11 ∘ ● ∘ ● ● Compressor processor
fault Overheating/overvoltage at
the compressor speed con-
troller; air inlet blocked;
check compressor motor
12 ∘ ● ● ∘ ∘ Compressor idle Checking the compressor
13 ∘ ● ● ∘ ● Max. compressor
speed exceeded Restart; if problem persists,
replace controller of the ex-
ternal unit
14 ∘ ● ● ● ∘ Excessive compressor
power consumption Checking the compressor
15 ∘ ● ● ● ● DC undervoltage DC voltage below limit; re-
place external unit controller
16 ● ∘ ∘ ∘ ∘ DC overvoltage Check mains voltage under
load (max. 264 V~); if OK
then replace external unit
controller
17 ● ∘ ∘ ∘ ● AC undervoltage Check mains voltage under
load (max. 198 V~); if OK
then replace external unit
controller
18 ● ∘ ∘ ● ∘ No communication Check the connecting cable
between the internal device,
the external unit and earth
... (N/A)
22 ● ∘ ● ● ∘ Min. compressor
speed not achieved Restart; if problem persists,
replace controller of the ex-
ternal unit
23 ● ∘ ● ● ● System configuration
changed For information only (com-
munication cables were
modified)
Diagnosis
(cont.)
21
Troubleshooting
5692
687
GB