Viessmann VITOTRONIC 200 Service Instructions Manual page 157

Refrigerant circuit
(cont.)
Message Meaning
code
81 Torque of compressor
H
drive too high
82 Mains voltage too high
H
(> 420 V~) or intermediate
circuit voltage too high
83 Mains voltage too low
H
(< 380 V~) or intermediate
circuit voltage too low
84 Temperature at inverter
H
(IGBT) too high
85 Temperature at inverter
H
(IGBT) too low
86 Inverter power consump-
H
tion (IGBT) permanently
too high
87 Temperature at the com-
H
pressor drive windings too
high (> 90 °C)
88 Compressor drive blocked
S
for more than 5 s.
89 A-D converter fault
S
■
Instrument transformer
■
faulty
8C H Modbus communication
error
8F Inverter switched off
S
92 Compressor does not
H
reach its set speed.
Heat pump characteris-
tics
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Measure
Test coil resistance at compressor. Re-
sistance on all windings must be simi-
lar ( 10 %). For m use a suitable
± Ω
measuring device.
Test mains voltage at mains terminals:
If mains voltage is too high (+10 %),
clarify the cause in consultation with
the power supply utility.
Test mains voltage at mains terminals:
If mains voltage is too low (
clarify the cause in consultation with
the power supply utility.
Check fan at inverter heat sink. Re-
place inverter if necessary.
Replace inverter.
Test coil resistance at compressor. Re-
sistance on all windings must be simi-
lar ( 10 %). For m use a suitable
± Ω
measuring device.
No action required
■
If problem recurs: Notify a specialist.
■
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 Modbus connecting cable, in-
verter EEV PCB.
—
Check that the correct coding card is
■
fitted: See "System information".
Check phase sequence on compres-
■
sor.
Diagnosis
10 %),
–
use a suita-
157