Technical data

CU230P-2 Control Units, Getting Started
28 A5E02484096, 05/2009
6 Diagnostics
Options to display the state
Extraordinary inverter states are displayed using fault and alarm messages. An overview of all of the possible alarms and
faults is provided in Chapter 3 of the list manual.
The inverter provides the following options to display the state:
● LED - via the Control Unit
You will find details in the next section.
● Alarm and fault numbers via IOP and STARTER
You will find detailed descriptions on the alarm and fault numbers in the corresponding online help or in the List Manual.
● Diagnostic parameters via a control
Fault display on a higher-level control system
6.1 Operating states indicated on LEDs
Operating states of the Control Unit displayed by LEDs
The Control Unit is equipped with two LEDs, RDY (Ready) and BF (Bus Fault) that display the inverter status by showing a
red or green steady or flashing light.
There are two main inverter states, i.e. power-up and operation.
● Power-up
During power-up, the inverter progresses through various states which are indicated by red flickering or flashing for brief
periods by the Ready and the Bus Fault LEDs. It is not possible to read the inverter's current state from these displays.
● Operation
The relevant inverter state in operation is displayed by the LED states described below.
Possible LED states
21UHG
21JUHHQ
IODVKLQJUHG+]
IODVKLQJJUHHQ+]
IODVKLQJUHG+]
IODVKLQJJUHHQ+]
/('GLVSOD\VIRULQYHUWHUDQGFRPPXQLFDWLRQ $GGLWLRQDOVWDWXVGLVSOD\VIRUWKHRSHUDWRUSDQHO/('IRU&$1RSHQ
IODVKLQJUHG+]
IODVKLQJJUHHQ+]
VLQJOHIODVKUHG
VLQJOHIODVKJUHHQ
GRXEOHIODVKUHG
GRXEOHIODVKUHG
V
V
Table 4 LED display of inverter states
LED Explanation
RDY BF
ON - green --- Ready for operation (no active fault)
2 Hz - red --- General fault
0.5 Hz - green OFF Commissioning/reset to factory settings