Viessmann VITOTRONIC 200 Service Instructions Manual page 154

Diagnosis
Refrigerant circuit
Message Meaning
code
03 Short circuit/lead break,
S
suction gas temperature
sensor
05 Short circuit/lead break,
S
high pressure sensor
06 Short circuit/lead break
S
liquid gas temperature
sensor (downstream of re-
frigerant collector)
0A Short circuit/lead break,
S
low pressure sensor (suc-
tion gas pressure sensor)
0D S Short circuit/lead break,
coding resistor
0E S Short circuit/lead break,
hot gas temperature sen-
sor
0F Short circuit/lead break
S
liquid gas temperature
sensor (downstream of
condenser)
10 Compressor has stopped.
H
13 Communication error
S
18 Compressor fault (general
S
message)
1E EEV PCB faulty
S
20 Condensing pressure too
H
high (control high pres-
sure)
21 Inadequate evaporation
H
pressure (low pressure
fault)
22 Excessively high hot gas
H
temperature
26 Max. defrost time excee-
H
ded
154
(cont.)
Heat pump characteris-
tics
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Subject to other messages
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Defrost is terminated early.
Measure
Check resistance value (NTC 10 k
at connection J21 (T7) on the EEV
PCB: See "EEV PCB [4]".
Check current at connection J10 (P2)
on the EEV PCB: See "EEV PCB [4]".
Take refrigerant R410A into account.
Check resistance value (NTC 10 k
at connection J13 (T5) on the EEV
PCB: See "EEV PCB [4]".
Check current at connection J10 (P1)
on the EEV PCB: See "EEV PCB [4]".
Take refrigerant R410A into account.
Check resistance at connection J10
■
(P3) on the EEV PCB.
If necessary, contact Viessmann
■
Werke technical services.
Check 3-pole plug at the compressor
(white, red and black wires). Replace
hot gas temperature sensor if neces-
sary.
Check resistance value (NTC 10 k
at connection J13 (T5) on the EEV
PCB: See "EEV PCB [4]".
No action required
Check the electrical connection be-
tween the refrigerant circuit controller
and the inverter.
See further messages regarding the
compressor and inverter (message
code "80" and above).
Replace EEV PCB.
As for "D4 Control high pressure":
See "Message overview" for the heat
pump control unit.
As for "D3 Low pressure": See "Mes-
sage overview" for the heat pump con-
trol unit.
Have a specialist check the com-
■
pressor parameters ("5xxx").
Check whether the coding card
■
matches the heat pump. To check in-
formation, see "System information".
Check "Evaporator temperature
■
for defrost end 5010". Restore fac-
tory settings if necessary.
Check function of 4-way diverter
■
valve: See "Actuator test".
)
Ω
)
Ω
)
Ω