English
TROUBLESHOOTING AND MAINTENANCE
Protection/Alarm
Description
Possible causes
F157:
IGBT undertemperature
Fault of undertemperature measured by the sensors
in the IGBTs, rectifier, power and/or control below -30
◦
C.
- Ambient temperature around the inverter
≤
-30
◦
C.
F158:
Corrupted settings
Inverter settings are invalid.
Note:
- Restore the settings from a backup.
- Parameter settings file cannot be restored correctly.
F160:
STO90 Fault
It indicates to the user that STO90 is in a fault state.
- Incorrect installation of the safety inputs circuit
(STO1 and STO2).
- Actuation time between the safety inputs (STO1 and
STO2) greater than 1 s.
- Incorrect setting of the safety input type (dry contact
or OSSD) on DIP switches S1.
- DIP switches S2 activated in a state other than the
STO state.
- Incorrect programming of the safety function or
programming timeout (2 min).
- Damage in the electronic circuit of STO90.
F161:
STO90 Off-line
It indicates to the user that CFW900 central control
has lost communication with STO90.
- Poor contact between STO90 and CFW900 central
control.
- Damage in the electronic circuit of STO90 or
CFW900 central control.
F171:
Pow. Fan 1 Speed
Heat sink fan 1 speed fault.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
F172:
Pow. Fan 2 Speed
Heat sink fan 2 speed fault.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
F173:
Pow. Fan 3 Speed
Heat sink fan 3 speed fault.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
F174:
Pow. Fan 4 Speed
Heat sink fan 4 speed fault.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
F175:
Int. Fan 1 Speed
Internal fan 1 speed fault.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
F176:
Int. Fan 2 Speed
Internal fan 2 speed fault.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
A181:
Clock with invalid value
Clock with wrong time.
- Set the date and time in C11.1.2.
- Battery low, defective or not installed.
F185:
Pre-charge Protection
It indicates pre-charge contactor fault.
- Defective pre-charge contactor.
- Command fuse open.
- Phase loss at input L1/R or L2/S.
A186:
Pow. Fan 1 Speed
Heat sink fan low speed alarm.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
64 | CFW900
Summary of Contents for CFW900
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