Viessmann VITOTRONIC 200 Service Instructions Manual page 149

Refrigerant circuit
(cont.)
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
Message Meaning
code
00 No message
―
01 Short circuit/lead break,
S
air intake temperature
sensor
02 Short circuit/lead break,
S
air discharge temperature
sensor
03 Short circuit/lead break
S
suction gas temperature
sensor
04 Short circuit/lead break,
S
hot gas temperature sen-
sor
05 Short circuit/lead break,
S
high pressure sensor
06 Short circuit/lead break
S
liquid gas temperature
sensor 1 (upstream of the
EEV)
07 Short circuit/lead break
S
liquid gas temperature
sensor 2 (downstream of
the EEV)
08 Short circuit/lead break,
S
return temperature sensor,
secondary circuit
09 Short circuit/lead break
S
evaporator temperature
sensor
0A Short circuit/lead break,
S
low pressure sensor
10/11 Compressor has stopped.
H
12 Inverter fault (general
―
message)
15 Inverter and compressor
S
incompatible
Heat pump characteris-
tics
―
Operation with temperature
value of return temperature
sensor in primary circuit,
plus 3 K
Operation with temperature
value of flow temperature
sensor in primary circuit,
minus 2 K
Compressor OFF
Compressor remains in
■
operation.
Energy statement is not
■
calculated correctly: See
chapter "Diagnosis, ener-
gy statement".
Compressor remains in
■
operation.
Energy statement is not
■
calculated correctly: See
chapter "Diagnosis, ener-
gy statement".
Operation with temperature
value of flow temperature
sensor in secondary circuit,
minus 5 K
Compressor may stop due
to a change in refrigerant
circuit conditions.
Compressor OFF
Subject to other messages
Compressor OFF
Measure
―
Check resistance value (Pt500A) at
the sensor connection of the EEV
PCB: See "EEV PCB [2]".
Check resistance value (Pt500A) at
the sensor connection of the EEV
PCB: See "EEV PCB [2]".
Test voltage at the high pressure sen-
sor connection: See "EEV PCB [2]".
0.5 V: 0 bar
■
4.5 V: Max. pressure, see sensor im-
■
print.
Check resistance value (Pt500A) at
the sensor connection of the EEV
PCB: See "EEV PCB [2]".
Test voltage at the low pressure sen-
sor connection: See "EEV PCB [2]".
0.5 V: 0 bar
■
4.5 V: Max. pressure, see sensor im-
■
print.
No action required
Observe other messages relating to
the inverter (message codes "80" to
"93").
Check whether the coding card match-
es the heat pump. To check informa-
tion, see "System information".
Diagnosis
149