Message History [6] - Viessmann VITOTRONIC 200 Service Instructions Manual

Diagnosis
Refrigerant circuit
Message history [6]
For refrigerant circuit controller [6]: For differentiating
between the refrigerant circuit controllers, see chapter
"System information".
Message history of the refrigerant circuit controller
(status and fault information):
■ Messages cannot be acknowledged in the message
history.
■ Messages are listed in chronological order. The most
recent message is listed first.
Up to 30 entries are stored.
■
1. Service menu:
Press OK + simultaneously and hold for
å
approx. 4 s.
2. "Diagnosis"
3. "Refrigerant circuit"
4. "Message history"
Message overview
Note
Some faults should only be remedied by a (specialist)
heating contractor certified for heat pumps by
Viessmann.
Message Meaning
code
00 No message
―
04 Short circuit/lead break,
S
hot gas temperature sen-
sor
05 Short circuit/lead break,
S
high pressure sensor
08 Short circuit/lead break,
S
return temperature sensor,
secondary circuit
172
(cont.)
Heat pump characteris-
tics
―
Both compressors OFF
Both compressors OFF
Operation with temperature
value of flow temperature
sensor in secondary circuit,
minus 5 K
A B
Message history
0 09.09.2009 17:16:00
1 09.09.2009 17:16:01
2 09.09.2009 17:16:02
3 09.09.2009 17:16:03
Back with
Fig. 38
Message number
A
B Date and time of the last occurrence
2-digit message code
C
Type of message: "Note" or "Fault"
D
Frequency of occurrence
E
Refrigerant circuit controller messages can trigger a
message at the heat pump control unit (see "Message
overview"). Which message will be triggered at the
heat pump control unit depends on the type of mes-
sage at the refrigerant circuit controller.
Type of message at Message at heat pump con-
refrigerant circuit trol unit
controller
"Note" "07 Fault refrigerant circ"
H
"Fault" "05 Fault refrigerant circ"
S
Measure
―
Check resistance value (NTC 10 k
at sensor connection on the EEV PCB:
See "Controller PCB and EEV PCB
[6]".
Test voltage at the high pressure sen-
sor connection: See "Controller PCB
and EEV PCB [6]".
0.5 V: 0 bar
■
4.5 V: Max. pressure, see sensor im-
■
print.
Check resistance value (NTC 10 k
at sensor connection on the controller
PCB: See "Controller PCB and EEV
PCB [6]".
C D E
06 Fault 7
0A Fault 3
03 Note 11
10 Fault
1
)
Ω
)
Ω