ABB ACS800 Series Firmware Manual page 186

174
Fault Cause
SLOT OVERLAP Two option modules have same connection
interface selection.
(FF8A)
START INHIBI Optional start inhibit hardware logic is
activated.
(FF7A)
SUPPLY PHASE Intermediate circuit DC voltage is oscillating
due to missing mains phase, blown fuse or
(3130)
rectifier bridge internal fault.
02.19 FW 2 bit 00
Trip occurs when DC voltage ripple is 13% of
DC voltage.
TEMP DIF xx y Excessive temperature difference between
several parallel connected inverter modules. xx
(4380)
(1...12) refers to inverter module number and y
refers to phase (U, V, W).
Alarm is indicated when temperature difference
is 15°C. Fault is indicated when temperature
difference is 20°C
Excessive temperature can be caused e.g. by
unequal current sharing between parallel
connected inverters.
THERMAL MODE Motor thermal protection mode is set to DTC
for high-power motor.
(FF50)
THERMISTOR Motor temperature is excessive. Motor thermal
protection mode selection is THERMISTOR.
(4311)
02.18 FW 1 bit 05
(programmable
Fault Function
30.04...30.05)
UNDERLOAD Motor load is too low due to e.g. release
mechanism in driven equipment.
(FF6A)
02.18 FW 1 bit 08
(programmable
Fault Function
30.13...30.15)
USER MACRO No User Macro saved or file is defective.
(FFA1)
Fault tracing
What to Do
Check connection interface selections in group
98 OPTION MODULES.
Check start inhibit circuit (AGPS board).
Check mains fuses.
Check for mains supply imbalance.
Check cooling fan.
Replace fan.
Check air filters.
See parameter 30.05.
Check motor ratings and load.
Check start-up data.
Check thermistor connections to digital input
DI6.
Check for problem in driven equipment.
Check Fault Function parameters.
Create User Macro.