Viessmann VITOTRONIC 200 Service Instructions Manual page 171

Refrigerant circuit
(cont.)
Message Meaning
code
A8 Vitocal 333-G:
H
Compressor drive over-
heated
A9 Vitocal 333-G:
H
Current phase L1 of com-
pressor too high
AA Vitocal 333-G:
H
Current phase L2 of com-
pressor too high
AB Vitocal 333-G:
H
Current phase L3 of com-
pressor too high
AC Vitocal 333-G:
H
Current of power factor
correction filter too high
(detected via sensor)
AD Vitocal 333-G:
H
Current of power factor
correction filter too high
(detected via software)
AE Vitocal 333-G:
H
Voltage of power factor
correction filter too high
B9 Secondary pump blocked
S
BA Secondary pump electrical
S
fault
BB Fault, PWM signal from
S
secondary pump (actual
speed)
BC Secondary pump run dry
S
C4 Vitocal 333-G:
H
Slip of compressor drive
too high
8C Vitocal 333-G:
H
Modbus communication
error
Heat pump characteris-
tics
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor remains in op-
eration.
Secondary pump continues
to run at previously set
speed, without monitoring.
Compressor OFF
Compressor OFF
Compressor OFF
Measure
Test coil resistance at compressor.
■
Resistance on all windings must be
similar ( 10 %). For m
± Ω
ble measuring device.
Replace compressor and/or inverter
■
if necessary.
Replace inverter.
Check secondary pump. Replace the
secondary pump if required.
Carry out electrical check of secon-
dary pump.
Vitocal 222-G:
Check voltage at connections J5
■
and J17 on the EEV PCB.
Vitocal 333-G:
Check voltage at connection J20 on
■
the EEV PCB.
See "EEV PCB [4-6] / [4-7]".
Replace the secondary pump if re-
quired.
Check PWM signal at secondary
pump. Check signal at connection J26
on the EEV PCB: See "EEV PCB
[4-6] / [4-7]".
Replace the secondary pump if re-
quired.
Fill the secondary circuit. Vent the sec-
ondary circuit.
No action required
Check Modbus connecting cable, in-
verter EEV PCB.
—
Diagnosis
use a suita-
171