Bosch Rexroth EFC 3600 Operating Instructions Manual page 136

Bosch Rexroth AG
Diagnosis
Error
Error name Possible reason
code
SC
IPHL
OPHL
OH
134/235
Internal fault of IGBT
External short circuit of motor
phase-phase
Earth surge
Abnormal, omitted or broken
connection of frequency con‐
verter power supply
Broken fuse
Imbalance in the three pha‐
ses of input power supply
Main circuit capacitor deterio‐
ration
Abnormal, omitted or broken
connection of frequency con‐
verter outputs
Imbalance in the three pha‐
ses of outputs
Frequency converter (heat
sink) temperature is higher
than max allowable tempera‐
ture 85°C
Temperature detection circuit
fault
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
Solution
Replace the frequency converter
Check the motor
Remove the short circuit and
check the motor
Follow operating procedures to
check power supply connections,
remove omitted or broken con‐
nection
Check fuse
Check if the imbalance situation
exceeds requirements
Replace the frequency converter
Check the connections of fre‐
quency converter outputs, remove
omitted or broken connections
Check the motor
● Reduce ambient temperature,
improve ventilation and heat
dissipation; clear dust, cotton
wadding in air ducts; check fan
and its power supply connec‐
tion (if available)
● Reduce the load if it is too
heavy
● Reduce the carrier frequency
[b0.21]
Replace the frequency converter