Viessmann VITOTRONIC 200 Service Instructions Manual page 158

Diagnosis
Refrigerant circuit
Message Meaning
code
95 Discharge current at IGBT
H
too high
96 Precharge relay open
H
97 Voltage difference of indi-
H
vidual phases too high
(> 50 %)
98 Voltage difference of indi-
H
vidual phases too high
(> 5 A)
99 Current difference of pow-
H
er factor correction filter
too high (> 10 A)
9A Supply voltage of inverter
H
control outside of voltage
range
9B Temperature of power fac-
H
tor correction filter too
high
9C Outside temperature too
H
low
9D Temperature differential of
H
phase controls too high
9F More than 10 messages
H
have occurred
B0 Fan communication fault
S
B1 Fan motor overheats
S
B2 Fan motor speed monitor
S
faulty
B3 Fan motor blocked
S
B4 Fan motor supply voltage
S
too low
158
(cont.)
Heat pump characteris-
tics
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Compressor OFF
Fan off, compressor re-
mains in operation.
Fan off, compressor re-
mains in operation.
Fan off, compressor re-
mains in operation.
Fan off, compressor re-
mains in operation.
Fan off, compressor re-
mains in operation.
Measure
Replace inverter.
Test coil resistance at compressor.
■
Resistance on all windings must be
similar ( 10 %). For m
± Ω
ble measuring device.
Replace inverter if necessary.
■
No action required
Test coil resistance at compressor.
■
Resistance on all windings must be
similar ( 10 %). For m
± Ω
ble measuring device.
Replace inverter if necessary.
■
Inverter is automatically reset. If mes-
sage continues to be displayed, reset
inverter in "Actuator test".
Check plug at connection J19: See
■
"EEV PCB [4]".
Check luster terminals in the heat
■
pump terminal area if necessary.
Replace motor if it is mechanically
■
sluggish in its movement.
If the motor turns easily, notify a spe-
■
cialist.
Check electrical connection of fan in
■
heat pump terminal area.
Replace fan motor if necessary.
■
If fault persists, notify a specialist.
■
If motor is mechanically sluggish, re-
■
move blockage. Replace motor if
necessary.
If the motor turns easily, notify a spe-
■
cialist.
Check electrical connection of fan in
■
heat pump terminal area.
Replace fan motor if necessary.
■
If fault persists, notify a specialist.
■
use a suita-
use a suita-